Re: [PATCH] net: emac: emac gigabit ethernet controller driver
From: Timur Tabi
Date: Tue Dec 15 2015 - 19:16:19 EST
Gilad Avidov wrote:
Add support for ethernet controller HW on Qualcomm Technologies, Inc. SoC.
This driver supports the following features:
1) Receive Side Scaling (RSS).
2) Checksum offload.
3) Runtime power management support.
4) Interrupt coalescing support.
5) SGMII phy.
6) SGMII direct connection without external phy.
Based on a driver by Niranjana Vishwanathapura
<nvishwan@xxxxxxxxxxxxxx>.
Changes since v1 (https://lkml.org/lkml/2015/12/7/1088)
You forgot to add "[v2]" to the subject line of this email.
- replace hw bit fields to macros with bitwise operations.
- change all iterators to unsized types (int)
- some minor code flow improvements.
- change return type to void for functions which return value is never
used.
- replace instance of xxxxl_relaxed() io followed by mb() with a
readl()/writel().
Signed-off-by: Gilad Avidov <gavidov@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/net/qcom-emac.txt | 80 +
drivers/net/ethernet/qualcomm/Kconfig | 7 +
drivers/net/ethernet/qualcomm/Makefile | 2 +
drivers/net/ethernet/qualcomm/emac/Makefile | 7 +
drivers/net/ethernet/qualcomm/emac/emac-mac.c | 2224 ++++++++++++++++++++
drivers/net/ethernet/qualcomm/emac/emac-mac.h | 287 +++
drivers/net/ethernet/qualcomm/emac/emac-phy.c | 529 +++++
drivers/net/ethernet/qualcomm/emac/emac-phy.h | 73 +
drivers/net/ethernet/qualcomm/emac/emac-sgmii.c | 696 ++++++
drivers/net/ethernet/qualcomm/emac/emac-sgmii.h | 30 +
drivers/net/ethernet/qualcomm/emac/emac.c | 1322 ++++++++++++
drivers/net/ethernet/qualcomm/emac/emac.h | 427 ++++
12 files changed, 5684 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/qcom-emac.txt
create mode 100644 drivers/net/ethernet/qualcomm/emac/Makefile
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-mac.c
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-mac.h
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-phy.c
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-phy.h
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac.c
create mode 100644 drivers/net/ethernet/qualcomm/emac/emac.h
diff --git a/Documentation/devicetree/bindings/net/qcom-emac.txt b/Documentation/devicetree/bindings/net/qcom-emac.txt
new file mode 100644
index 0000000..51c17c1
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qcom-emac.txt
@@ -0,0 +1,80 @@
+Qualcomm EMAC Gigabit Ethernet Controller
+
+Required properties:
+- cell-index : EMAC controller instance number.
+- compatible : Should be "qcom,emac".
+- reg : Offset and length of the register regions for the device
+- reg-names : Register region names referenced in 'reg' above.
+ Required register resource entries are:
+ "base" : EMAC controller base register block.
+ "csr" : EMAC wrapper register block.
+ Optional register resource entries are:
+ "ptp" : EMAC PTP (1588) register block.
+ Required if 'qcom,emac-tstamp-en' is present.
+ "sgmii" : EMAC SGMII PHY register block.
+- interrupts : Interrupt numbers used by this controller
+- interrupt-names : Interrupt resource names referenced in 'interrupts' above.
+ Required interrupt resource entries are:
+ "core0_irq" : EMAC core0 interrupt.
+ "sgmii_irq" : EMAC SGMII interrupt.
+ Optional interrupt resource entries are:
+ "core1_irq" : EMAC core1 interrupt.
+ "core2_irq" : EMAC core2 interrupt.
+ "core3_irq" : EMAC core3 interrupt.
+ "wol_irq" : EMAC Wake-On-LAN (WOL) interrupt. Required if WOL is used.
+- qcom,emac-gpio-mdc : GPIO pin number of the MDC line of MDIO bus.
+- qcom,emac-gpio-mdio : GPIO pin number of the MDIO line of MDIO bus.
+- phy-addr : Specifies phy address on MDIO bus.
+ Required if the optional property "qcom,no-external-phy"
+ is not specified.
+
+Optional properties:
+- qcom,emac-tstamp-en : Enables the PTP (1588) timestamping feature.
+ Include this only if PTP (1588) timestamping
+ feature is needed. If included, "ptp" register
+ base should be specified.
+- mac-address : The 6-byte MAC address. If present, it is the
+ default MAC address.
+- qcom,no-external-phy : Indicates there is no external PHY connected to
+ EMAC. Include this only if the EMAC is directly
+ connected to the peer end without EPHY.
+- qcom,emac-ptp-grandmaster : Enable the PTP (1588) grandmaster mode.
+ Include this only if PTP (1588) is configured as
+ grandmaster.
+- qcom,emac-ptp-frac-ns-adj : The vector table to adjust the fractional ns per
+ RTC clock cycle.
+ Include this only if there is accuracy loss of
+ fractional ns per RTC clock cycle. For individual
+ table entry, the first field indicates the RTC
+ reference clock rate. The second field indicates
+ the number of adjustment in 2 ^ -26 ns.
+Example:
+ emac0: qcom,emac@feb20000 {
+ cell-index = <0>;
+ compatible = "qcom,emac";
+ reg-names = "base", "csr", "ptp", "sgmii";
+ reg = <0xfeb20000 0x10000>,
+ <0xfeb36000 0x1000>,
+ <0xfeb3c000 0x4000>,
+ <0xfeb38000 0x400>;
+ #address-cells = <0>;
+ interrupt-parent = <&emac0>;
+ #interrupt-cells = <1>;
+ interrupts = <0 1 2 3 4 5>;
+ interrupt-map-mask = <0xffffffff>;
+ interrupt-map = <0 &intc 0 76 0
+ 1 &intc 0 77 0
+ 2 &intc 0 78 0
+ 3 &intc 0 79 0
+ 4 &intc 0 80 0>;
+ interrupt-names = "core0_irq",
+ "core1_irq",
+ "core2_irq",
+ "core3_irq",
+ "sgmii_irq";
+ qcom,emac-gpio-mdc = <&msmgpio 123 0>;
+ qcom,emac-gpio-mdio = <&msmgpio 124 0>;
+ qcom,emac-tstamp-en;
+ qcom,emac-ptp-frac-ns-adj = <125000000 1>;
+ phy-addr = <0>;
+ };
diff --git a/drivers/net/ethernet/qualcomm/Kconfig b/drivers/net/ethernet/qualcomm/Kconfig
index a76e380..ae9442d 100644
--- a/drivers/net/ethernet/qualcomm/Kconfig
+++ b/drivers/net/ethernet/qualcomm/Kconfig
@@ -24,4 +24,11 @@ config QCA7000
To compile this driver as a module, choose M here. The module
will be called qcaspi.
+config QCOM_EMAC
+ tristate "MSM EMAC Gigabit Ethernet support"
+ default n
+ select CRC32
+ ---help---
+ This driver supports the Qualcomm EMAC Gigabit Ethernet controller.
Needs more text here.
+
endif # NET_VENDOR_QUALCOMM
diff --git a/drivers/net/ethernet/qualcomm/Makefile b/drivers/net/ethernet/qualcomm/Makefile
index 9da2d75..b14686e 100644
--- a/drivers/net/ethernet/qualcomm/Makefile
+++ b/drivers/net/ethernet/qualcomm/Makefile
@@ -4,3 +4,5 @@
obj-$(CONFIG_QCA7000) += qcaspi.o
qcaspi-objs := qca_spi.o qca_framing.o qca_7k.o qca_debug.o
+
+obj-$(CONFIG_QCOM_EMAC) += emac/
\ No newline at end of file
diff --git a/drivers/net/ethernet/qualcomm/emac/Makefile b/drivers/net/ethernet/qualcomm/emac/Makefile
new file mode 100644
index 0000000..01ee144
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Qualcomm Technologies, Inc. EMAC Gigabit Ethernet driver
+#
+
+obj-$(CONFIG_QCOM_EMAC) += qcom-emac.o
+
+qcom-emac-objs := emac.o emac-mac.o emac-phy.o emac-sgmii.o
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
new file mode 100644
index 0000000..9cb1275
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -0,0 +1,2224 @@
+/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Qualcomm Technologies, Inc. EMAC Ethernet Controller MAC layer support
+ */
+
+#include <linux/tcp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/crc32.h>
+#include <linux/if_vlan.h>
+#include <linux/jiffies.h>
+#include <linux/phy.h>
+#include <linux/of.h>
+#include <linux/gpio.h>
+#include <linux/pm_runtime.h>
+#include "emac.h"
+#include "emac-mac.h"
+
+/* EMAC base register offsets */
+#define EMAC_MAC_CTRL 0x001480
+#define EMAC_WOL_CTRL0 0x0014a0
+#define EMAC_RSS_KEY0 0x0014b0
+#define EMAC_H1TPD_BASE_ADDR_LO 0x0014e0
+#define EMAC_H2TPD_BASE_ADDR_LO 0x0014e4
+#define EMAC_H3TPD_BASE_ADDR_LO 0x0014e8
+#define EMAC_INTER_SRAM_PART9 0x001534
+#define EMAC_DESC_CTRL_0 0x001540
+#define EMAC_DESC_CTRL_1 0x001544
+#define EMAC_DESC_CTRL_2 0x001550
+#define EMAC_DESC_CTRL_10 0x001554
+#define EMAC_DESC_CTRL_12 0x001558
+#define EMAC_DESC_CTRL_13 0x00155c
+#define EMAC_DESC_CTRL_3 0x001560
+#define EMAC_DESC_CTRL_4 0x001564
+#define EMAC_DESC_CTRL_5 0x001568
+#define EMAC_DESC_CTRL_14 0x00156c
+#define EMAC_DESC_CTRL_15 0x001570
+#define EMAC_DESC_CTRL_16 0x001574
+#define EMAC_DESC_CTRL_6 0x001578
+#define EMAC_DESC_CTRL_8 0x001580
+#define EMAC_DESC_CTRL_9 0x001584
+#define EMAC_DESC_CTRL_11 0x001588
+#define EMAC_TXQ_CTRL_0 0x001590
+#define EMAC_TXQ_CTRL_1 0x001594
+#define EMAC_TXQ_CTRL_2 0x001598
+#define EMAC_RXQ_CTRL_0 0x0015a0
+#define EMAC_RXQ_CTRL_1 0x0015a4
+#define EMAC_RXQ_CTRL_2 0x0015a8
+#define EMAC_RXQ_CTRL_3 0x0015ac
+#define EMAC_BASE_CPU_NUMBER 0x0015b8
+#define EMAC_DMA_CTRL 0x0015c0
+#define EMAC_MAILBOX_0 0x0015e0
+#define EMAC_MAILBOX_5 0x0015e4
+#define EMAC_MAILBOX_6 0x0015e8
+#define EMAC_MAILBOX_13 0x0015ec
+#define EMAC_MAILBOX_2 0x0015f4
+#define EMAC_MAILBOX_3 0x0015f8
+#define EMAC_MAILBOX_11 0x00160c
+#define EMAC_AXI_MAST_CTRL 0x001610
+#define EMAC_MAILBOX_12 0x001614
+#define EMAC_MAILBOX_9 0x001618
+#define EMAC_MAILBOX_10 0x00161c
+#define EMAC_ATHR_HEADER_CTRL 0x001620
+#define EMAC_CLK_GATE_CTRL 0x001814
+#define EMAC_MISC_CTRL 0x001990
+#define EMAC_MAILBOX_7 0x0019e0
+#define EMAC_MAILBOX_8 0x0019e4
+#define EMAC_MAILBOX_15 0x001bd4
+#define EMAC_MAILBOX_16 0x001bd8
+
+/* EMAC_MAC_CTRL */
+#define SINGLE_PAUSE_MODE 0x10000000
+#define DEBUG_MODE 0x8000000
+#define BROAD_EN 0x4000000
+#define MULTI_ALL 0x2000000
+#define RX_CHKSUM_EN 0x1000000
+#define HUGE 0x800000
+#define SPEED_BMSK 0x300000
+#define SPEED_SHFT 20
+#define SIMR 0x80000
+#define TPAUSE 0x10000
+#define PROM_MODE 0x8000
+#define VLAN_STRIP 0x4000
+#define PRLEN_BMSK 0x3c00
+#define PRLEN_SHFT 10
+#define HUGEN 0x200
+#define FLCHK 0x100
+#define PCRCE 0x80
+#define CRCE 0x40
+#define FULLD 0x20
+#define MAC_LP_EN 0x10
+#define RXFC 0x8
+#define TXFC 0x4
+#define RXEN 0x2
+#define TXEN 0x1
+
+/* EMAC_WOL_CTRL0 */
+#define LK_CHG_PME 0x20
+#define LK_CHG_EN 0x10
+#define MG_FRAME_PME 0x8
+#define MG_FRAME_EN 0x4
+#define WK_FRAME_EN 0x1
+
+/* EMAC_DESC_CTRL_3 */
+#define RFD_RING_SIZE_BMSK 0xfff
+
+/* EMAC_DESC_CTRL_4 */
+#define RX_BUFFER_SIZE_BMSK 0xffff
+
+/* EMAC_DESC_CTRL_6 */
+#define RRD_RING_SIZE_BMSK 0xfff
+
+/* EMAC_DESC_CTRL_9 */
+#define TPD_RING_SIZE_BMSK 0xffff
+
+/* EMAC_TXQ_CTRL_0 */
+#define NUM_TXF_BURST_PREF_BMSK 0xffff0000
+#define NUM_TXF_BURST_PREF_SHFT 16
+#define LS_8023_SP 0x80
+#define TXQ_MODE 0x40
+#define TXQ_EN 0x20
+#define IP_OP_SP 0x10
+#define NUM_TPD_BURST_PREF_BMSK 0xf
+#define NUM_TPD_BURST_PREF_SHFT 0
+
+/* EMAC_TXQ_CTRL_1 */
+#define JUMBO_TASK_OFFLOAD_THRESHOLD_BMSK 0x7ff
+
+/* EMAC_TXQ_CTRL_2 */
+#define TXF_HWM_BMSK 0xfff0000
+#define TXF_LWM_BMSK 0xfff
+
+/* EMAC_RXQ_CTRL_0 */
+#define RXQ_EN 0x80000000
+#define CUT_THRU_EN 0x40000000
+#define RSS_HASH_EN 0x20000000
+#define NUM_RFD_BURST_PREF_BMSK 0x3f00000
+#define NUM_RFD_BURST_PREF_SHFT 20
+#define IDT_TABLE_SIZE_BMSK 0x1ff00
+#define IDT_TABLE_SIZE_SHFT 8
+#define SP_IPV6 0x80
+
+/* EMAC_RXQ_CTRL_1 */
+#define JUMBO_1KAH_BMSK 0xf000
+#define JUMBO_1KAH_SHFT 12
+#define RFD_PREF_LOW_TH 0x10
+#define RFD_PREF_LOW_THRESHOLD_BMSK 0xfc0
+#define RFD_PREF_LOW_THRESHOLD_SHFT 6
+#define RFD_PREF_UP_TH 0x10
+#define RFD_PREF_UP_THRESHOLD_BMSK 0x3f
+#define RFD_PREF_UP_THRESHOLD_SHFT 0
+
+/* EMAC_RXQ_CTRL_2 */
+#define RXF_DOF_THRESFHOLD 0x1a0
+#define RXF_DOF_THRESHOLD_BMSK 0xfff0000
+#define RXF_DOF_THRESHOLD_SHFT 16
+#define RXF_UOF_THRESFHOLD 0xbe
+#define RXF_UOF_THRESHOLD_BMSK 0xfff
+#define RXF_UOF_THRESHOLD_SHFT 0
+
+/* EMAC_RXQ_CTRL_3 */
+#define RXD_TIMER_BMSK 0xffff0000
+#define RXD_THRESHOLD_BMSK 0xfff
+#define RXD_THRESHOLD_SHFT 0
+
+/* EMAC_DMA_CTRL */
+#define DMAW_DLY_CNT_BMSK 0xf0000
+#define DMAW_DLY_CNT_SHFT 16
+#define DMAR_DLY_CNT_BMSK 0xf800
+#define DMAR_DLY_CNT_SHFT 11
+#define DMAR_REQ_PRI 0x400
+#define REGWRBLEN_BMSK 0x380
+#define REGWRBLEN_SHFT 7
+#define REGRDBLEN_BMSK 0x70
+#define REGRDBLEN_SHFT 4
+#define OUT_ORDER_MODE 0x4
+#define ENH_ORDER_MODE 0x2
+#define IN_ORDER_MODE 0x1
+
+/* EMAC_MAILBOX_13 */
+#define RFD3_PROC_IDX_BMSK 0xfff0000
+#define RFD3_PROC_IDX_SHFT 16
+#define RFD3_PROD_IDX_BMSK 0xfff
+#define RFD3_PROD_IDX_SHFT 0
+
+/* EMAC_MAILBOX_2 */
+#define NTPD_CONS_IDX_BMSK 0xffff0000
+#define NTPD_CONS_IDX_SHFT 16
+
+/* EMAC_MAILBOX_3 */
+#define RFD0_CONS_IDX_BMSK 0xfff
+#define RFD0_CONS_IDX_SHFT 0
+
+/* EMAC_MAILBOX_11 */
+#define H3TPD_PROD_IDX_BMSK 0xffff0000
+#define H3TPD_PROD_IDX_SHFT 16
+
+/* EMAC_AXI_MAST_CTRL */
+#define DATA_BYTE_SWAP 0x8
+#define MAX_BOUND 0x2
+#define MAX_BTYPE 0x1
+
+/* EMAC_MAILBOX_12 */
+#define H3TPD_CONS_IDX_BMSK 0xffff0000
+#define H3TPD_CONS_IDX_SHFT 16
+
+/* EMAC_MAILBOX_9 */
+#define H2TPD_PROD_IDX_BMSK 0xffff
+#define H2TPD_PROD_IDX_SHFT 0
+
+/* EMAC_MAILBOX_10 */
+#define H1TPD_CONS_IDX_BMSK 0xffff0000
+#define H1TPD_CONS_IDX_SHFT 16
+#define H2TPD_CONS_IDX_BMSK 0xffff
+#define H2TPD_CONS_IDX_SHFT 0
+
+/* EMAC_ATHR_HEADER_CTRL */
+#define HEADER_CNT_EN 0x2
+#define HEADER_ENABLE 0x1
+
+/* EMAC_MAILBOX_0 */
+#define RFD0_PROC_IDX_BMSK 0xfff0000
+#define RFD0_PROC_IDX_SHFT 16
+#define RFD0_PROD_IDX_BMSK 0xfff
+#define RFD0_PROD_IDX_SHFT 0
+
+/* EMAC_MAILBOX_5 */
+#define RFD1_PROC_IDX_BMSK 0xfff0000
+#define RFD1_PROC_IDX_SHFT 16
+#define RFD1_PROD_IDX_BMSK 0xfff
+#define RFD1_PROD_IDX_SHFT 0
+
+/* EMAC_MISC_CTRL */
+#define RX_UNCPL_INT_EN 0x1
+
+/* EMAC_MAILBOX_7 */
+#define RFD2_CONS_IDX_BMSK 0xfff0000
+#define RFD2_CONS_IDX_SHFT 16
+#define RFD1_CONS_IDX_BMSK 0xfff
+#define RFD1_CONS_IDX_SHFT 0
+
+/* EMAC_MAILBOX_8 */
+#define RFD3_CONS_IDX_BMSK 0xfff
+#define RFD3_CONS_IDX_SHFT 0
+
+/* EMAC_MAILBOX_15 */
+#define NTPD_PROD_IDX_BMSK 0xffff
+#define NTPD_PROD_IDX_SHFT 0
+
+/* EMAC_MAILBOX_16 */
+#define H1TPD_PROD_IDX_BMSK 0xffff
+#define H1TPD_PROD_IDX_SHFT 0
+
+#define RXQ0_RSS_HSTYP_IPV6_TCP_EN 0x20
+#define RXQ0_RSS_HSTYP_IPV6_EN 0x10
+#define RXQ0_RSS_HSTYP_IPV4_TCP_EN 0x8
+#define RXQ0_RSS_HSTYP_IPV4_EN 0x4
+
+/* DMA address */
+#define DMA_ADDR_HI_MASK 0xffffffff00000000ULL
+#define DMA_ADDR_LO_MASK 0x00000000ffffffffULL
+
+#define EMAC_DMA_ADDR_HI(_addr) \
+ ((u32)(((u64)(_addr) & DMA_ADDR_HI_MASK) >> 32))
+#define EMAC_DMA_ADDR_LO(_addr) \
+ ((u32)((u64)(_addr) & DMA_ADDR_LO_MASK))
+
+/* EMAC_EMAC_WRAPPER_TX_TS_INX */
+#define EMAC_WRAPPER_TX_TS_EMPTY 0x80000000
+#define EMAC_WRAPPER_TX_TS_INX_BMSK 0xffff
+
+struct emac_skb_cb {
+ u32 tpd_idx;
+ unsigned long jiffies;
+};
+
+struct emac_tx_ts_cb {
+ u32 sec;
+ u32 ns;
+};
+
+#define EMAC_SKB_CB(skb) ((struct emac_skb_cb *)(skb)->cb)
+#define EMAC_TX_TS_CB(skb) ((struct emac_tx_ts_cb *)(skb)->cb)
+#define EMAC_RSS_IDT_SIZE 256
+#define JUMBO_1KAH 0x4
+#define RXD_TH 0x100
+#define EMAC_TPD_LAST_FRAGMENT 0x80000000
+#define EMAC_TPD_TSTAMP_SAVE 0x80000000
+
+/* EMAC Errors in emac_rrd.word[3] */
+#define EMAC_RRD_L4F BIT(14)
+#define EMAC_RRD_IPF BIT(15)
+#define EMAC_RRD_CRC BIT(21)
+#define EMAC_RRD_FAE BIT(22)
+#define EMAC_RRD_TRN BIT(23)
+#define EMAC_RRD_RNT BIT(24)
+#define EMAC_RRD_INC BIT(25)
+#define EMAC_RRD_FOV BIT(29)
+#define EMAC_RRD_LEN BIT(30)
+
+/* Error bits that will result in a received frame being discarded */
+#define EMAC_RRD_ERROR (EMAC_RRD_IPF | EMAC_RRD_CRC | EMAC_RRD_FAE | \
+ EMAC_RRD_TRN | EMAC_RRD_RNT | EMAC_RRD_INC | \
+ EMAC_RRD_FOV | EMAC_RRD_LEN)
+#define EMAC_RRD_STATS_DW_IDX 3
+
+#define EMAC_RRD(RXQ, SIZE, IDX) ((RXQ)->rrd.v_addr + (SIZE * (IDX)))
+#define EMAC_RFD(RXQ, SIZE, IDX) ((RXQ)->rfd.v_addr + (SIZE * (IDX)))
+#define EMAC_TPD(TXQ, SIZE, IDX) ((TXQ)->tpd.v_addr + (SIZE * (IDX)))
+
+#define GET_RFD_BUFFER(RXQ, IDX) (&((RXQ)->rfd.rfbuff[(IDX)]))
+#define GET_TPD_BUFFER(RTQ, IDX) (&((RTQ)->tpd.tpbuff[(IDX)]))
+
+#define EMAC_TX_POLL_HWTXTSTAMP_THRESHOLD 8
+
+#define ISR_RX_PKT (\
+ RX_PKT_INT0 |\
+ RX_PKT_INT1 |\
+ RX_PKT_INT2 |\
+ RX_PKT_INT3)
+
+static void emac_mac_irq_enable(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < EMAC_NUM_CORE_IRQ; i++) {
+ struct emac_irq *irq = &adpt->irq[i];
+ const struct emac_irq_config *irq_cfg = &emac_irq_cfg_tbl[i];
+
+ writel_relaxed(~DIS_INT, adpt->base + irq_cfg->status_reg);
+ writel_relaxed(irq->mask, adpt->base + irq_cfg->mask_reg);
+ }
+
+ wmb(); /* ensure that irq and ptp setting are flushed to HW */
+}
+
+static void emac_mac_irq_disable(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < EMAC_NUM_CORE_IRQ; i++) {
+ const struct emac_irq_config *irq_cfg = &emac_irq_cfg_tbl[i];
+
+ writel_relaxed(DIS_INT, adpt->base + irq_cfg->status_reg);
+ writel_relaxed(0, adpt->base + irq_cfg->mask_reg);
+ }
+ wmb(); /* ensure that irq clearings are flushed to HW */
+
+ for (i = 0; i < EMAC_NUM_CORE_IRQ; i++)
+ if (adpt->irq[i].irq)
+ synchronize_irq(adpt->irq[i].irq);
+}
+
+void emac_mac_multicast_addr_set(struct emac_adapter *adpt, u8 *addr)
+{
+ u32 crc32, bit, reg, mta;
+
+ /* Calculate the CRC of the MAC address */
+ crc32 = ether_crc(ETH_ALEN, addr);
+
+ /* The HASH Table is an array of 2 32-bit registers. It is
+ * treated like an array of 64 bits (BitArray[hash_value]).
+ * Use the upper 6 bits of the above CRC as the hash value.
+ */
+ reg = (crc32 >> 31) & 0x1;
+ bit = (crc32 >> 26) & 0x1F;
+
+ mta = readl_relaxed(adpt->base + EMAC_HASH_TAB_REG0 + (reg << 2));
+ mta |= (0x1 << bit);
+ writel_relaxed(mta, adpt->base + EMAC_HASH_TAB_REG0 + (reg << 2));
+ wmb(); /* ensure that the mac address is flushed to HW */
+}
+
+void emac_mac_multicast_addr_clear(struct emac_adapter *adpt)
+{
+ writel_relaxed(0, adpt->base + EMAC_HASH_TAB_REG0);
+ writel_relaxed(0, adpt->base + EMAC_HASH_TAB_REG1);
+ wmb(); /* ensure that clearing the mac address is flushed to HW */
+}
As Arnd said, all of these wmb() are bogus. They don't guarantee any
actual flushing to hardware. And the writel_relaxed() should be changed
to writel() in almost every situation.
+
+/* definitions for RSS */
+#define EMAC_RSS_KEY(_i, _type) \
+ (EMAC_RSS_KEY0 + ((_i) * sizeof(_type)))
+#define EMAC_RSS_TBL(_i, _type) \
+ (EMAC_IDT_TABLE0 + ((_i) * sizeof(_type)))
+
+/* RSS */
+static void emac_mac_rss_config(struct emac_adapter *adpt)
+{
+ int key_len_by_u32 = ARRAY_SIZE(adpt->rss_key);
+ int idt_len_by_u32 = ARRAY_SIZE(adpt->rss_idt);
+ u32 rxq0;
+ int i;
+
+ /* Fill out hash function keys */
+ for (i = 0; i < key_len_by_u32; i++) {
+ u32 key, idx_base;
+
+ idx_base = (key_len_by_u32 - i) * 4;
+ key = ((adpt->rss_key[idx_base - 1]) |
+ (adpt->rss_key[idx_base - 2] << 8) |
+ (adpt->rss_key[idx_base - 3] << 16) |
+ (adpt->rss_key[idx_base - 4] << 24));
+ writel_relaxed(key, adpt->base + EMAC_RSS_KEY(i, u32));
+ }
+
+ /* Fill out redirection table */
+ for (i = 0; i < idt_len_by_u32; i++)
+ writel_relaxed(adpt->rss_idt[i],
+ adpt->base + EMAC_RSS_TBL(i, u32));
+
+ writel_relaxed(adpt->rss_base_cpu, adpt->base + EMAC_BASE_CPU_NUMBER);
+
+ rxq0 = readl_relaxed(adpt->base + EMAC_RXQ_CTRL_0);
+ if (adpt->rss_hstype & EMAC_RSS_HSTYP_IPV4_EN)
+ rxq0 |= RXQ0_RSS_HSTYP_IPV4_EN;
+ else
+ rxq0 &= ~RXQ0_RSS_HSTYP_IPV4_EN;
+
+ if (adpt->rss_hstype & EMAC_RSS_HSTYP_TCP4_EN)
+ rxq0 |= RXQ0_RSS_HSTYP_IPV4_TCP_EN;
+ else
+ rxq0 &= ~RXQ0_RSS_HSTYP_IPV4_TCP_EN;
+
+ if (adpt->rss_hstype & EMAC_RSS_HSTYP_IPV6_EN)
+ rxq0 |= RXQ0_RSS_HSTYP_IPV6_EN;
+ else
+ rxq0 &= ~RXQ0_RSS_HSTYP_IPV6_EN;
+
+ if (adpt->rss_hstype & EMAC_RSS_HSTYP_TCP6_EN)
+ rxq0 |= RXQ0_RSS_HSTYP_IPV6_TCP_EN;
+ else
+ rxq0 &= ~RXQ0_RSS_HSTYP_IPV6_TCP_EN;
+
+ rxq0 |= ((adpt->rss_idt_size << IDT_TABLE_SIZE_SHFT) &
+ IDT_TABLE_SIZE_BMSK);
+ rxq0 |= RSS_HASH_EN;
+
+ wmb(); /* ensure all parameters are written before enabling RSS */
+
+ writel(rxq0, adpt->base + EMAC_RXQ_CTRL_0);
+}
+
+/* Config MAC modes */
+void emac_mac_mode_config(struct emac_adapter *adpt)
+{
+ u32 mac;
+
+ mac = readl_relaxed(adpt->base + EMAC_MAC_CTRL);
+
+ if (test_bit(EMAC_STATUS_VLANSTRIP_EN, &adpt->status))
+ mac |= VLAN_STRIP;
+ else
+ mac &= ~VLAN_STRIP;
+
+ if (test_bit(EMAC_STATUS_PROMISC_EN, &adpt->status))
+ mac |= PROM_MODE;
+ else
+ mac &= ~PROM_MODE;
+
+ if (test_bit(EMAC_STATUS_MULTIALL_EN, &adpt->status))
+ mac |= MULTI_ALL;
+ else
+ mac &= ~MULTI_ALL;
+
+ if (test_bit(EMAC_STATUS_LOOPBACK_EN, &adpt->status))
+ mac |= MAC_LP_EN;
+ else
+ mac &= ~MAC_LP_EN;
+
+ writel_relaxed(mac, adpt->base + EMAC_MAC_CTRL);
+ wmb(); /* ensure MAC setting is flushed to HW */
+}
+
+/* Wake On LAN (WOL) */
+void emac_mac_wol_config(struct emac_adapter *adpt, u32 wufc)
+{
+ u32 wol = 0;
+
+ /* turn on magic packet event */
+ if (wufc & EMAC_WOL_MAGIC)
+ wol |= MG_FRAME_EN | MG_FRAME_PME | WK_FRAME_EN;
+
+ /* turn on link up event */
+ if (wufc & EMAC_WOL_PHY)
+ wol |= LK_CHG_EN | LK_CHG_PME;
+
+ writel_relaxed(wol, adpt->base + EMAC_WOL_CTRL0);
+ wmb(); /* ensure that WOL setting is flushed to HW */
+}
+
+/* Power Management */
+void emac_mac_pm(struct emac_adapter *adpt, u32 speed, bool wol_en, bool rx_en)
+{
+ u32 dma_mas, mac;
+
+ dma_mas = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL);
+ dma_mas &= ~LPW_CLK_SEL;
+ dma_mas |= LPW_STATE;
+
+ mac = readl_relaxed(adpt->base + EMAC_MAC_CTRL);
+ mac &= ~(FULLD | RXEN | TXEN);
+ mac = (mac & ~SPEED_BMSK) |
+ (((u32)emac_mac_speed_10_100 << SPEED_SHFT) & SPEED_BMSK);
+
+ if (wol_en) {
+ if (rx_en)
+ mac |= RXEN | BROAD_EN;
+
+ /* If WOL is enabled, set link speed/duplex for mac */
+ if (speed == EMAC_LINK_SPEED_1GB_FULL)
+ mac = (mac & ~SPEED_BMSK) |
+ (((u32)emac_mac_speed_1000 << SPEED_SHFT) &
+ SPEED_BMSK);
+
+ if (speed == EMAC_LINK_SPEED_10_FULL ||
+ speed == EMAC_LINK_SPEED_100_FULL ||
+ speed == EMAC_LINK_SPEED_1GB_FULL)
+ mac |= FULLD;
+ } else {
+ /* select lower clock speed if WOL is disabled */
+ dma_mas |= LPW_CLK_SEL;
+ }
+
+ writel_relaxed(dma_mas, adpt->base + EMAC_DMA_MAS_CTRL);
+ writel_relaxed(mac, adpt->base + EMAC_MAC_CTRL);
+ wmb(); /* ensure that power setting is flushed to HW */
+}
+
+/* Config descriptor rings */
+static void emac_mac_dma_rings_config(struct emac_adapter *adpt)
+{
+ static const unsigned int tpd_q_offset[] = {
+ EMAC_DESC_CTRL_8, EMAC_H1TPD_BASE_ADDR_LO,
+ EMAC_H2TPD_BASE_ADDR_LO, EMAC_H3TPD_BASE_ADDR_LO};
+ static const unsigned int rfd_q_offset[] = {
+ EMAC_DESC_CTRL_2, EMAC_DESC_CTRL_10,
+ EMAC_DESC_CTRL_12, EMAC_DESC_CTRL_13};
+ static const unsigned int rrd_q_offset[] = {
+ EMAC_DESC_CTRL_5, EMAC_DESC_CTRL_14,
+ EMAC_DESC_CTRL_15, EMAC_DESC_CTRL_16};
+ int i;
+
+ if (adpt->timestamp_en)
+ emac_reg_update32(adpt->csr + EMAC_EMAC_WRAPPER_CSR1,
+ 0, ENABLE_RRD_TIMESTAMP);
+
+ /* TPD (Transmit Packet Descriptor) */
+ writel_relaxed(EMAC_DMA_ADDR_HI(adpt->tx_q[0].tpd.p_addr),
+ adpt->base + EMAC_DESC_CTRL_1);
+
+ for (i = 0; i < adpt->tx_q_cnt; ++i)
+ writel_relaxed(EMAC_DMA_ADDR_LO(adpt->tx_q[i].tpd.p_addr),
+ adpt->base + tpd_q_offset[i]);
+
+ writel_relaxed(adpt->tx_q[0].tpd.count & TPD_RING_SIZE_BMSK,
+ adpt->base + EMAC_DESC_CTRL_9);
+
+ /* RFD (Receive Free Descriptor) & RRD (Receive Return Descriptor) */
+ writel_relaxed(EMAC_DMA_ADDR_HI(adpt->rx_q[0].rfd.p_addr),
+ adpt->base + EMAC_DESC_CTRL_0);
+
+ for (i = 0; i < adpt->rx_q_cnt; ++i) {
+ writel_relaxed(EMAC_DMA_ADDR_LO(adpt->rx_q[i].rfd.p_addr),
+ adpt->base + rfd_q_offset[i]);
+ writel_relaxed(EMAC_DMA_ADDR_LO(adpt->rx_q[i].rrd.p_addr),
+ adpt->base + rrd_q_offset[i]);
+ }
+
+ writel_relaxed(adpt->rx_q[0].rfd.count & RFD_RING_SIZE_BMSK,
+ adpt->base + EMAC_DESC_CTRL_3);
+ writel_relaxed(adpt->rx_q[0].rrd.count & RRD_RING_SIZE_BMSK,
+ adpt->base + EMAC_DESC_CTRL_6);
+
+ writel_relaxed(adpt->rxbuf_size & RX_BUFFER_SIZE_BMSK,
+ adpt->base + EMAC_DESC_CTRL_4);
+
+ writel_relaxed(0, adpt->base + EMAC_DESC_CTRL_11);
+
+ wmb(); /* ensure all parameters are written before we enable them */
+
+ /* Load all of the base addresses above and ensure that triggering HW to
+ * read ring pointers is flushed
+ */
+ writel(1, adpt->base + EMAC_INTER_SRAM_PART9);
+}
+
+/* Config transmit parameters */
+static void emac_mac_tx_config(struct emac_adapter *adpt)
+{
+ u32 val;
+
+ writel_relaxed((EMAC_MAX_TX_OFFLOAD_THRESH >> 3) &
+ JUMBO_TASK_OFFLOAD_THRESHOLD_BMSK,
+ adpt->base + EMAC_TXQ_CTRL_1);
+
+ val = (adpt->tpd_burst << NUM_TPD_BURST_PREF_SHFT) &
+ NUM_TPD_BURST_PREF_BMSK;
+
+ val |= (TXQ_MODE | LS_8023_SP);
+ val |= (0x0100 << NUM_TXF_BURST_PREF_SHFT) &
+ NUM_TXF_BURST_PREF_BMSK;
+
+ writel_relaxed(val, adpt->base + EMAC_TXQ_CTRL_0);
+ emac_reg_update32(adpt->base + EMAC_TXQ_CTRL_2,
+ (TXF_HWM_BMSK | TXF_LWM_BMSK), 0);
+ wmb(); /* ensure that Tx control settings are flushed to HW */
+}
+
+/* Config receive parameters */
+static void emac_mac_rx_config(struct emac_adapter *adpt)
+{
+ u32 val;
+
+ val = ((adpt->rfd_burst << NUM_RFD_BURST_PREF_SHFT) &
+ NUM_RFD_BURST_PREF_BMSK);
+ val |= (SP_IPV6 | CUT_THRU_EN);
+
+ writel_relaxed(val, adpt->base + EMAC_RXQ_CTRL_0);
+
+ val = readl_relaxed(adpt->base + EMAC_RXQ_CTRL_1);
+ val &= ~(JUMBO_1KAH_BMSK | RFD_PREF_LOW_THRESHOLD_BMSK |
+ RFD_PREF_UP_THRESHOLD_BMSK);
+ val |= (JUMBO_1KAH << JUMBO_1KAH_SHFT) |
+ (RFD_PREF_LOW_TH << RFD_PREF_LOW_THRESHOLD_SHFT) |
+ (RFD_PREF_UP_TH << RFD_PREF_UP_THRESHOLD_SHFT);
+ writel_relaxed(val, adpt->base + EMAC_RXQ_CTRL_1);
+
+ val = readl_relaxed(adpt->base + EMAC_RXQ_CTRL_2);
+ val &= ~(RXF_DOF_THRESHOLD_BMSK | RXF_UOF_THRESHOLD_BMSK);
+ val |= (RXF_DOF_THRESFHOLD << RXF_DOF_THRESHOLD_SHFT) |
+ (RXF_UOF_THRESFHOLD << RXF_UOF_THRESHOLD_SHFT);
+ writel_relaxed(val, adpt->base + EMAC_RXQ_CTRL_2);
+
+ val = readl_relaxed(adpt->base + EMAC_RXQ_CTRL_3);
+ val &= ~(RXD_TIMER_BMSK | RXD_THRESHOLD_BMSK);
+ val |= RXD_TH << RXD_THRESHOLD_SHFT;
+ writel_relaxed(val, adpt->base + EMAC_RXQ_CTRL_3);
Can you use emac_reg_update32() here?
+ wmb(); /* ensure that Rx control settings are flushed to HW */
+}
+
+/* Config dma */
+static void emac_mac_dma_config(struct emac_adapter *adpt)
+{
+ u32 dma_ctrl;
+
+ dma_ctrl = DMAR_REQ_PRI;
+
+ switch (adpt->dma_order) {
+ case emac_dma_ord_in:
+ dma_ctrl |= IN_ORDER_MODE;
+ break;
+ case emac_dma_ord_enh:
+ dma_ctrl |= ENH_ORDER_MODE;
+ break;
+ case emac_dma_ord_out:
+ dma_ctrl |= OUT_ORDER_MODE;
+ break;
+ default:
+ break;
+ }
+
+ dma_ctrl |= (((u32)adpt->dmar_block) << REGRDBLEN_SHFT) &
+ REGRDBLEN_BMSK;
+ dma_ctrl |= (((u32)adpt->dmaw_block) << REGWRBLEN_SHFT) &
+ REGWRBLEN_BMSK;
+ dma_ctrl |= (((u32)adpt->dmar_dly_cnt) << DMAR_DLY_CNT_SHFT) &
+ DMAR_DLY_CNT_BMSK;
+ dma_ctrl |= (((u32)adpt->dmaw_dly_cnt) << DMAW_DLY_CNT_SHFT) &
+ DMAW_DLY_CNT_BMSK;
+
+ /* config DMA and ensure that configuration is flushed to HW */
+ writel(dma_ctrl, adpt->base + EMAC_DMA_CTRL);
+}
+
+void emac_mac_config(struct emac_adapter *adpt)
+{
+ u32 val;
+
+ emac_mac_addr_clear(adpt, adpt->mac_addr);
+
+ emac_mac_dma_rings_config(adpt);
+
+ writel_relaxed(adpt->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
+ adpt->base + EMAC_MAX_FRAM_LEN_CTRL);
+
+ emac_mac_tx_config(adpt);
+ emac_mac_rx_config(adpt);
+ emac_mac_dma_config(adpt);
+
+ val = readl_relaxed(adpt->base + EMAC_AXI_MAST_CTRL);
+ val &= ~(DATA_BYTE_SWAP | MAX_BOUND);
+ val |= MAX_BTYPE;
+ writel_relaxed(val, adpt->base + EMAC_AXI_MAST_CTRL);
Can you use emac_reg_update32() here?
+ writel_relaxed(0, adpt->base + EMAC_CLK_GATE_CTRL);
+ writel_relaxed(RX_UNCPL_INT_EN, adpt->base + EMAC_MISC_CTRL);
+ wmb(); /* ensure that the MAC configuration is flushed to HW */
+}
+
+void emac_mac_reset(struct emac_adapter *adpt)
+{
+ writel_relaxed(0, adpt->base + EMAC_INT_MASK);
+ writel_relaxed(DIS_INT, adpt->base + EMAC_INT_STATUS);
+
+ emac_mac_stop(adpt);
+
+ emac_reg_update32(adpt->base + EMAC_DMA_MAS_CTRL, 0, SOFT_RST);
+ wmb(); /* ensure mac is fully reset */
+ usleep_range(100, 150); /* reset may take upto 100usec */
+
+ emac_reg_update32(adpt->base + EMAC_DMA_MAS_CTRL, 0, INT_RD_CLR_EN);
+ wmb(); /* ensure the interrupt clear-on-read setting is flushed to HW */
+}
+
+void emac_mac_start(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 mac, csr1;
+
+ /* enable tx queue */
+ if (adpt->tx_q_cnt && (adpt->tx_q_cnt <= EMAC_MAX_TX_QUEUES))
+ emac_reg_update32(adpt->base + EMAC_TXQ_CTRL_0, 0, TXQ_EN);
+
+ /* enable rx queue */
+ if (adpt->rx_q_cnt && (adpt->rx_q_cnt <= EMAC_MAX_RX_QUEUES))
+ emac_reg_update32(adpt->base + EMAC_RXQ_CTRL_0, 0, RXQ_EN);
+
+ /* enable mac control */
+ mac = readl_relaxed(adpt->base + EMAC_MAC_CTRL);
+ csr1 = readl_relaxed(adpt->csr + EMAC_EMAC_WRAPPER_CSR1);
+
+ mac |= TXEN | RXEN; /* enable RX/TX */
+
+ /* enable RX/TX Flow Control */
+ switch (phy->cur_fc_mode) {
+ case EMAC_FC_FULL:
+ mac |= (TXFC | RXFC);
+ break;
+ case EMAC_FC_RX_PAUSE:
+ mac |= RXFC;
+ break;
+ case EMAC_FC_TX_PAUSE:
+ mac |= TXFC;
+ break;
+ default:
+ break;
+ }
+
+ /* setup link speed */
+ mac &= ~SPEED_BMSK;
+ switch (phy->link_speed) {
+ case EMAC_LINK_SPEED_1GB_FULL:
+ mac |= ((emac_mac_speed_1000 << SPEED_SHFT) & SPEED_BMSK);
+ csr1 |= FREQ_MODE;
+ break;
+ default:
+ mac |= ((emac_mac_speed_10_100 << SPEED_SHFT) & SPEED_BMSK);
+ csr1 &= ~FREQ_MODE;
+ break;
+ }
+
+ switch (phy->link_speed) {
+ case EMAC_LINK_SPEED_1GB_FULL:
+ case EMAC_LINK_SPEED_100_FULL:
+ case EMAC_LINK_SPEED_10_FULL:
+ mac |= FULLD;
+ break;
+ default:
+ mac &= ~FULLD;
+ }
+
+ /* other parameters */
+ mac |= (CRCE | PCRCE);
+ mac |= ((adpt->preamble << PRLEN_SHFT) & PRLEN_BMSK);
+ mac |= BROAD_EN;
+ mac |= FLCHK;
+ mac &= ~RX_CHKSUM_EN;
+ mac &= ~(HUGEN | VLAN_STRIP | TPAUSE | SIMR | HUGE | MULTI_ALL |
+ DEBUG_MODE | SINGLE_PAUSE_MODE);
+
+ writel_relaxed(csr1, adpt->csr + EMAC_EMAC_WRAPPER_CSR1);
+
+ writel_relaxed(mac, adpt->base + EMAC_MAC_CTRL);
+
+ /* enable interrupt read clear, low power sleep mode and
+ * the irq moderators
+ */
+
+ writel_relaxed(adpt->irq_mod, adpt->base + EMAC_IRQ_MOD_TIM_INIT);
+ writel_relaxed(INT_RD_CLR_EN | LPW_MODE | IRQ_MODERATOR_EN |
+ IRQ_MODERATOR2_EN, adpt->base + EMAC_DMA_MAS_CTRL);
+
+ emac_mac_mode_config(adpt);
+
+ emac_reg_update32(adpt->base + EMAC_ATHR_HEADER_CTRL,
+ (HEADER_ENABLE | HEADER_CNT_EN), 0);
+
+ emac_reg_update32(adpt->csr + EMAC_EMAC_WRAPPER_CSR2, 0, WOL_EN);
+ wmb(); /* ensure that MAC setting are flushed to HW */
+}
+
+void emac_mac_stop(struct emac_adapter *adpt)
+{
+ emac_reg_update32(adpt->base + EMAC_RXQ_CTRL_0, RXQ_EN, 0);
+ emac_reg_update32(adpt->base + EMAC_TXQ_CTRL_0, TXQ_EN, 0);
+ emac_reg_update32(adpt->base + EMAC_MAC_CTRL, (TXEN | RXEN), 0);
+ wmb(); /* ensure mac is stopped before we proceed */
+ usleep_range(1000, 1050); /* stopping may take upto 1msec */
+}
+
+/* set MAC address */
+void emac_mac_addr_clear(struct emac_adapter *adpt, u8 *addr)
+{
+ u32 sta;
+
+ /* for example: 00-A0-C6-11-22-33
+ * 0<-->C6112233, 1<-->00A0.
+ */
+
+ /* low 32bit word */
+ sta = (((u32)addr[2]) << 24) | (((u32)addr[3]) << 16) |
+ (((u32)addr[4]) << 8) | (((u32)addr[5]));
+ writel_relaxed(sta, adpt->base + EMAC_MAC_STA_ADDR0);
+
+ /* hight 32bit word */
+ sta = (((u32)addr[0]) << 8) | (((u32)addr[1]));
+ writel_relaxed(sta, adpt->base + EMAC_MAC_STA_ADDR1);
+ wmb(); /* ensure that the MAC address is flushed to HW */
+}
+
+/* Read one entry from the HW tx timestamp FIFO */
+static bool emac_mac_tx_ts_read(struct emac_adapter *adpt,
+ struct emac_tx_ts *ts)
+{
+ u32 ts_idx;
+
+ ts_idx = readl_relaxed(adpt->csr + EMAC_EMAC_WRAPPER_TX_TS_INX);
+
+ if (ts_idx & EMAC_WRAPPER_TX_TS_EMPTY)
+ return false;
+
+ ts->ns = readl_relaxed(adpt->csr + EMAC_EMAC_WRAPPER_TX_TS_LO);
+ ts->sec = readl_relaxed(adpt->csr + EMAC_EMAC_WRAPPER_TX_TS_HI);
+ ts->ts_idx = ts_idx & EMAC_WRAPPER_TX_TS_INX_BMSK;
+
+ return true;
+}
+
+/* Free all descriptors of given transmit queue */
+static void emac_tx_q_descs_free(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q)
+{
+ size_t size;
+ int i;
+
+ /* ring already cleared, nothing to do */
+ if (!tx_q->tpd.tpbuff)
+ return;
+
+ for (i = 0; i < tx_q->tpd.count; i++) {
+ struct emac_buffer *tpbuf = GET_TPD_BUFFER(tx_q, i);
+
+ if (tpbuf->dma) {
+ dma_unmap_single(adpt->netdev->dev.parent, tpbuf->dma,
+ tpbuf->length, DMA_TO_DEVICE);
+ tpbuf->dma = 0;
+ }
+ if (tpbuf->skb) {
+ dev_kfree_skb_any(tpbuf->skb);
+ tpbuf->skb = NULL;
+ }
+ }
+
+ size = sizeof(struct emac_buffer) * tx_q->tpd.count;
+ memset(tx_q->tpd.tpbuff, 0, size);
+
+ /* clear the descriptor ring */
+ memset(tx_q->tpd.v_addr, 0, tx_q->tpd.size);
+
+ tx_q->tpd.consume_idx = 0;
+ tx_q->tpd.produce_idx = 0;
+}
+
+static void emac_tx_q_descs_free_all(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < adpt->tx_q_cnt; i++)
+ emac_tx_q_descs_free(adpt, &adpt->tx_q[i]);
+ netdev_reset_queue(adpt->netdev);
+}
+
+/* Free all descriptors of given receive queue */
+static void emac_rx_q_free_descs(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q)
+{
+ struct device *dev = adpt->netdev->dev.parent;
+ size_t size;
+ int i;
+
+ /* ring already cleared, nothing to do */
+ if (!rx_q->rfd.rfbuff)
+ return;
+
+ for (i = 0; i < rx_q->rfd.count; i++) {
+ struct emac_buffer *rfbuf = GET_RFD_BUFFER(rx_q, i);
+
+ if (rfbuf->dma) {
+ dma_unmap_single(dev, rfbuf->dma, rfbuf->length,
+ DMA_FROM_DEVICE);
+ rfbuf->dma = 0;
+ }
+ if (rfbuf->skb) {
+ dev_kfree_skb(rfbuf->skb);
+ rfbuf->skb = NULL;
+ }
+ }
+
+ size = sizeof(struct emac_buffer) * rx_q->rfd.count;
+ memset(rx_q->rfd.rfbuff, 0, size);
+
+ /* clear the descriptor rings */
+ memset(rx_q->rrd.v_addr, 0, rx_q->rrd.size);
+ rx_q->rrd.produce_idx = 0;
+ rx_q->rrd.consume_idx = 0;
+
+ memset(rx_q->rfd.v_addr, 0, rx_q->rfd.size);
+ rx_q->rfd.produce_idx = 0;
+ rx_q->rfd.consume_idx = 0;
+}
+
+static void emac_rx_q_free_descs_all(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ emac_rx_q_free_descs(adpt, &adpt->rx_q[i]);
+}
+
+/* Free all buffers associated with given transmit queue */
+static void emac_tx_q_bufs_free(struct emac_adapter *adpt, int que_idx)
+{
+ struct emac_tx_queue *tx_q = &adpt->tx_q[que_idx];
+
+ emac_tx_q_descs_free(adpt, tx_q);
+
+ kfree(tx_q->tpd.tpbuff);
+ tx_q->tpd.tpbuff = NULL;
+ tx_q->tpd.v_addr = NULL;
+ tx_q->tpd.p_addr = 0;
+ tx_q->tpd.size = 0;
+}
+
+static void emac_tx_q_bufs_free_all(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < adpt->tx_q_cnt; i++)
+ emac_tx_q_bufs_free(adpt, i);
+}
+
+/* Allocate TX descriptor ring for the given transmit queue */
+static int emac_tx_q_desc_alloc(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q)
+{
+ struct emac_ring_header *ring_header = &adpt->ring_header;
+ size_t size;
+
+ size = sizeof(struct emac_buffer) * tx_q->tpd.count;
+ tx_q->tpd.tpbuff = kzalloc(size, GFP_KERNEL);
+ if (!tx_q->tpd.tpbuff)
+ return -ENOMEM;
+
+ tx_q->tpd.size = tx_q->tpd.count * (adpt->tpd_size * 4);
+ tx_q->tpd.p_addr = ring_header->p_addr + ring_header->used;
+ tx_q->tpd.v_addr = ring_header->v_addr + ring_header->used;
+ ring_header->used += ALIGN(tx_q->tpd.size, 8);
+ tx_q->tpd.produce_idx = 0;
+ tx_q->tpd.consume_idx = 0;
+
+ return 0;
+}
+
+static int emac_tx_q_desc_alloc_all(struct emac_adapter *adpt)
+{
+ int retval = 0;
+ int i;
+
+ for (i = 0; i < adpt->tx_q_cnt; i++) {
+ retval = emac_tx_q_desc_alloc(adpt, &adpt->tx_q[i]);
+ if (retval)
+ break;
+ }
+
+ if (retval) {
+ netdev_err(adpt->netdev, "error: Tx Queue %u alloc failed\n",
+ i);
+ for (i--; i > 0; i--)
+ emac_tx_q_bufs_free(adpt, i);
+ }
+
+ return retval;
+}
+
+/* Free all buffers associated with given transmit queue */
+static void emac_rx_q_free_bufs(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q)
+{
+ emac_rx_q_free_descs(adpt, rx_q);
+
+ kfree(rx_q->rfd.rfbuff);
+ rx_q->rfd.rfbuff = NULL;
+
+ rx_q->rfd.v_addr = NULL;
+ rx_q->rfd.p_addr = 0;
+ rx_q->rfd.size = 0;
+
+ rx_q->rrd.v_addr = NULL;
+ rx_q->rrd.p_addr = 0;
+ rx_q->rrd.size = 0;
+}
+
+static void emac_rx_q_free_bufs_all(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ emac_rx_q_free_bufs(adpt, &adpt->rx_q[i]);
+}
+
+/* Allocate RX descriptor rings for the given receive queue */
+static int emac_rx_descs_alloc(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q)
+{
+ struct emac_ring_header *ring_header = &adpt->ring_header;
+ unsigned long size;
+
+ size = sizeof(struct emac_buffer) * rx_q->rfd.count;
+ rx_q->rfd.rfbuff = kzalloc(size, GFP_KERNEL);
+ if (!rx_q->rfd.rfbuff)
+ return -ENOMEM;
+
+ rx_q->rrd.size = rx_q->rrd.count * (adpt->rrd_size * 4);
+ rx_q->rfd.size = rx_q->rfd.count * (adpt->rfd_size * 4);
+
+ rx_q->rrd.p_addr = ring_header->p_addr + ring_header->used;
+ rx_q->rrd.v_addr = ring_header->v_addr + ring_header->used;
+ ring_header->used += ALIGN(rx_q->rrd.size, 8);
+
+ rx_q->rfd.p_addr = ring_header->p_addr + ring_header->used;
+ rx_q->rfd.v_addr = ring_header->v_addr + ring_header->used;
+ ring_header->used += ALIGN(rx_q->rfd.size, 8);
+
+ rx_q->rrd.produce_idx = 0;
+ rx_q->rrd.consume_idx = 0;
+
+ rx_q->rfd.produce_idx = 0;
+ rx_q->rfd.consume_idx = 0;
+
+ return 0;
+}
+
+static int emac_rx_descs_allocs_all(struct emac_adapter *adpt)
+{
+ int retval = 0;
+ int i;
+
+ for (i = 0; i < adpt->rx_q_cnt; i++) {
+ retval = emac_rx_descs_alloc(adpt, &adpt->rx_q[i]);
+ if (retval)
+ break;
+ }
+
+ if (retval) {
+ netdev_err(adpt->netdev, "error: Rx Queue %d alloc failed\n",
+ i);
+ for (i--; i > 0; i--)
+ emac_rx_q_free_bufs(adpt, &adpt->rx_q[i]);
+ }
+
+ return retval;
+}
+
+/* Allocate all TX and RX descriptor rings */
+int emac_mac_rx_tx_rings_alloc_all(struct emac_adapter *adpt)
+{
+ struct emac_ring_header *ring_header = &adpt->ring_header;
+ int num_tques = adpt->tx_q_cnt;
+ int num_rques = adpt->rx_q_cnt;
+ unsigned int num_tx_descs = adpt->tx_desc_cnt;
+ unsigned int num_rx_descs = adpt->rx_desc_cnt;
+ struct device *dev = adpt->netdev->dev.parent;
+ int retval, que_idx;
+
+ for (que_idx = 0; que_idx < adpt->tx_q_cnt; que_idx++)
+ adpt->tx_q[que_idx].tpd.count = adpt->tx_desc_cnt;
+
+ for (que_idx = 0; que_idx < adpt->rx_q_cnt; que_idx++) {
+ adpt->rx_q[que_idx].rrd.count = adpt->rx_desc_cnt;
+ adpt->rx_q[que_idx].rfd.count = adpt->rx_desc_cnt;
+ }
+
+ /* Ring DMA buffer. Each ring may need up to 8 bytes for alignment,
+ * hence the additional padding bytes are allocated.
+ */
+ ring_header->size =
+ num_tques * num_tx_descs * (adpt->tpd_size * 4) +
+ num_rques * num_rx_descs * (adpt->rfd_size * 4) +
+ num_rques * num_rx_descs * (adpt->rrd_size * 4) +
+ num_tques * 8 + num_rques * 2 * 8;
+
+ netif_info(adpt, ifup, adpt->netdev,
+ "TX queues %d, TX descriptors %d\n", num_tques,
+ num_tx_descs);
+ netif_info(adpt, ifup, adpt->netdev,
+ "RX queues %d, Rx descriptors %d\n", num_rques,
+ num_rx_descs);
+
+ ring_header->used = 0;
+ ring_header->v_addr = dma_alloc_coherent(dev, ring_header->size,
+ &ring_header->p_addr,
+ GFP_KERNEL);
+ if (!ring_header->v_addr)
+ return -ENOMEM;
+
+ memset(ring_header->v_addr, 0, ring_header->size);
+ ring_header->used = ALIGN(ring_header->p_addr, 8) - ring_header->p_addr;
+
+ retval = emac_tx_q_desc_alloc_all(adpt);
+ if (retval)
+ goto err_alloc_tx;
+
+ retval = emac_rx_descs_allocs_all(adpt);
+ if (retval)
+ goto err_alloc_rx;
+
+ return 0;
+
+err_alloc_rx:
+ emac_tx_q_bufs_free_all(adpt);
+err_alloc_tx:
+ dma_free_coherent(dev, ring_header->size,
+ ring_header->v_addr, ring_header->p_addr);
+
+ ring_header->v_addr = NULL;
+ ring_header->p_addr = 0;
+ ring_header->size = 0;
+ ring_header->used = 0;
+
+ return retval;
+}
+
+/* Free all TX and RX descriptor rings */
+void emac_mac_rx_tx_rings_free_all(struct emac_adapter *adpt)
+{
+ struct emac_ring_header *ring_header = &adpt->ring_header;
+ struct device *dev = adpt->netdev->dev.parent;
+
+ emac_tx_q_bufs_free_all(adpt);
+ emac_rx_q_free_bufs_all(adpt);
+
+ dma_free_coherent(dev, ring_header->size,
+ ring_header->v_addr, ring_header->p_addr);
+
+ ring_header->v_addr = NULL;
+ ring_header->p_addr = 0;
+ ring_header->size = 0;
+ ring_header->used = 0;
+}
+
+/* Initialize descriptor rings */
+static void emac_mac_rx_tx_ring_reset_all(struct emac_adapter *adpt)
+{
+ int i, j;
+
+ for (i = 0; i < adpt->tx_q_cnt; i++) {
+ struct emac_tx_queue *tx_q = &adpt->tx_q[i];
+ struct emac_buffer *tpbuf = tx_q->tpd.tpbuff;
+
+ tx_q->tpd.produce_idx = 0;
+ tx_q->tpd.consume_idx = 0;
+ for (j = 0; j < tx_q->tpd.count; j++)
+ tpbuf[j].dma = 0;
+ }
+
+ for (i = 0; i < adpt->rx_q_cnt; i++) {
+ struct emac_rx_queue *rx_q = &adpt->rx_q[i];
+ struct emac_buffer *rfbuf = rx_q->rfd.rfbuff;
+
+ rx_q->rrd.produce_idx = 0;
+ rx_q->rrd.consume_idx = 0;
+ rx_q->rfd.produce_idx = 0;
+ rx_q->rfd.consume_idx = 0;
+ for (j = 0; j < rx_q->rfd.count; j++)
+ rfbuf[j].dma = 0;
+ }
+}
+
+/* Configure Receive Side Scaling (RSS) */
+static void emac_rss_config(struct emac_adapter *adpt)
+{
+ static const u8 key[40] = {
+ 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
+ 0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
+ 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
+ 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
+ 0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA
+ };
+ u32 reta = 0;
+ int i, j;
+
+ if (adpt->rx_q_cnt == 1)
+ return;
+
+ if (!adpt->rss_initialized) {
+ adpt->rss_initialized = true;
+ /* initialize rss hash type and idt table size */
+ adpt->rss_hstype = EMAC_RSS_HSTYP_ALL_EN;
+ adpt->rss_idt_size = EMAC_RSS_IDT_SIZE;
+
+ /* Fill out RSS key */
+ memcpy(adpt->rss_key, key, sizeof(adpt->rss_key));
+
+ /* Fill out redirection table */
+ memset(adpt->rss_idt, 0x0, sizeof(adpt->rss_idt));
+ for (i = 0, j = 0; i < EMAC_RSS_IDT_SIZE; i++, j++) {
+ if (j == adpt->rx_q_cnt)
+ j = 0;
+ if (j > 1)
+ reta |= (j << ((i & 7) * 4));
+ if ((i & 7) == 7) {
+ adpt->rss_idt[(i >> 3)] = reta;
+ reta = 0;
+ }
+ }
+ }
+
+ emac_mac_rss_config(adpt);
+}
+
+/* Produce new receive free descriptor */
+static void emac_mac_rx_rfd_create(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q,
+ union emac_rfd *rfd)
+{
+ u32 *hw_rfd = EMAC_RFD(rx_q, adpt->rfd_size,
+ rx_q->rfd.produce_idx);
+
+ *(hw_rfd++) = rfd->word[0];
+ *hw_rfd = rfd->word[1];
+
+ if (++rx_q->rfd.produce_idx == rx_q->rfd.count)
+ rx_q->rfd.produce_idx = 0;
+}
+
+/* Fill up receive queue's RFD with preallocated receive buffers */
+static int emac_mac_rx_descs_refill(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q)
+{
+ struct emac_buffer *curr_rxbuf;
+ struct emac_buffer *next_rxbuf;
+ union emac_rfd rfd;
+ struct sk_buff *skb;
+ void *skb_data = NULL;
+ int count = 0;
+ u32 next_produce_idx;
+
+ next_produce_idx = rx_q->rfd.produce_idx;
+ if (++next_produce_idx == rx_q->rfd.count)
+ next_produce_idx = 0;
+ curr_rxbuf = GET_RFD_BUFFER(rx_q, rx_q->rfd.produce_idx);
+ next_rxbuf = GET_RFD_BUFFER(rx_q, next_produce_idx);
+
+ /* this always has a blank rx_buffer*/
+ while (!next_rxbuf->dma) {
+ skb = dev_alloc_skb(adpt->rxbuf_size + NET_IP_ALIGN);
+ if (!skb)
+ break;
+
+ /* Make buffer alignment 2 beyond a 16 byte boundary
+ * this will result in a 16 byte aligned IP header after
+ * the 14 byte MAC header is removed
+ */
+ skb_reserve(skb, NET_IP_ALIGN);
+ skb_data = skb->data;
+ curr_rxbuf->skb = skb;
+ curr_rxbuf->length = adpt->rxbuf_size;
+ curr_rxbuf->dma = dma_map_single(adpt->netdev->dev.parent,
+ skb_data, curr_rxbuf->length,
+ DMA_FROM_DEVICE);
+ rfd.addr = curr_rxbuf->dma;
+ emac_mac_rx_rfd_create(adpt, rx_q, &rfd);
+ next_produce_idx = rx_q->rfd.produce_idx;
+ if (++next_produce_idx == rx_q->rfd.count)
+ next_produce_idx = 0;
+
+ curr_rxbuf = GET_RFD_BUFFER(rx_q, rx_q->rfd.produce_idx);
+ next_rxbuf = GET_RFD_BUFFER(rx_q, next_produce_idx);
+ count++;
+ }
+
+ if (count) {
+ u32 prod_idx = (rx_q->rfd.produce_idx << rx_q->produce_shft) &
+ rx_q->produce_mask;
+ wmb(); /* ensure that the descriptors are properly set */
+ emac_reg_update32(adpt->base + rx_q->produce_reg,
+ rx_q->produce_mask, prod_idx);
+ wmb(); /* ensure that the producer's index is flushed to HW */
+ netif_dbg(adpt, rx_status, adpt->netdev,
+ "RX[%d]: prod idx 0x%x\n", rx_q->que_idx,
+ rx_q->rfd.produce_idx);
+ }
+
+ return count;
+}
+
+/* Bringup the interface/HW */
+int emac_mac_up(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+
+ struct net_device *netdev = adpt->netdev;
+ int retval = 0;
+ int i;
+
+ emac_mac_rx_tx_ring_reset_all(adpt);
+ emac_rx_mode_set(netdev);
+
+ emac_mac_config(adpt);
+ emac_rss_config(adpt);
+
+ retval = emac_phy_up(adpt);
+ if (retval)
+ return retval;
+
+ for (i = 0; phy->uses_gpios && i < EMAC_GPIO_CNT; i++) {
+ retval = gpio_request(adpt->gpio[i], emac_gpio_name[i]);
+ if (retval) {
+ netdev_err(adpt->netdev,
+ "error:%d on gpio_request(%d:%s)\n",
+ retval, adpt->gpio[i], emac_gpio_name[i]);
+ while (--i >= 0)
+ gpio_free(adpt->gpio[i]);
+ goto err_request_gpio;
+ }
+ }
+
+ for (i = 0; i < EMAC_IRQ_CNT; i++) {
+ struct emac_irq *irq = &adpt->irq[i];
+ const struct emac_irq_config *irq_cfg = &emac_irq_cfg_tbl[i];
+
+ if (!irq->irq)
+ continue;
+
+ retval = request_irq(irq->irq, irq_cfg->handler,
+ irq_cfg->irqflags, irq_cfg->name, irq);
+ if (retval) {
+ netdev_err(adpt->netdev,
+ "error:%d on request_irq(%d:%s flags:0x%lx)\n",
+ retval, irq->irq, irq_cfg->name,
+ irq_cfg->irqflags);
+ while (--i >= 0)
+ if (adpt->irq[i].irq)
+ free_irq(adpt->irq[i].irq,
+ &adpt->irq[i]);
+ goto err_request_irq;
+ }
+ }
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ emac_mac_rx_descs_refill(adpt, &adpt->rx_q[i]);
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ napi_enable(&adpt->rx_q[i].napi);
+
+ emac_mac_irq_enable(adpt);
+
+ netif_start_queue(netdev);
+ clear_bit(EMAC_STATUS_DOWN, &adpt->status);
+
+ /* check link status */
+ set_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status);
+ adpt->link_chk_timeout = jiffies + EMAC_TRY_LINK_TIMEOUT;
+ mod_timer(&adpt->timers, jiffies);
+
+ return retval;
+
+err_request_irq:
+ for (i = 0; adpt->phy.uses_gpios && i < EMAC_GPIO_CNT; i++)
+ gpio_free(adpt->gpio[i]);
+err_request_gpio:
+ emac_phy_down(adpt);
+ return retval;
+}
+
+/* Bring down the interface/HW */
+void emac_mac_down(struct emac_adapter *adpt, bool reset)
+{
+ struct net_device *netdev = adpt->netdev;
+ struct emac_phy *phy = &adpt->phy;
+
+ unsigned long flags;
+ int i;
+
+ set_bit(EMAC_STATUS_DOWN, &adpt->status);
+
+ netif_stop_queue(netdev);
+ netif_carrier_off(netdev);
+ emac_mac_irq_disable(adpt);
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ napi_disable(&adpt->rx_q[i].napi);
+
+ emac_phy_down(adpt);
+
+ for (i = 0; i < EMAC_IRQ_CNT; i++)
+ if (adpt->irq[i].irq)
+ free_irq(adpt->irq[i].irq, &adpt->irq[i]);
+
+ for (i = 0; phy->uses_gpios && i < EMAC_GPIO_CNT; i++)
+ gpio_free(adpt->gpio[i]);
+
+ clear_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status);
+ clear_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status);
+ clear_bit(EMAC_STATUS_TASK_CHK_SGMII_REQ, &adpt->status);
+ del_timer_sync(&adpt->timers);
+
+ cancel_work_sync(&adpt->tx_ts_task);
+ spin_lock_irqsave(&adpt->tx_ts_lock, flags);
+ __skb_queue_purge(&adpt->tx_ts_pending_queue);
+ __skb_queue_purge(&adpt->tx_ts_ready_queue);
+ spin_unlock_irqrestore(&adpt->tx_ts_lock, flags);
+
+ if (reset)
+ emac_mac_reset(adpt);
+
+ pm_runtime_put_noidle(netdev->dev.parent);
+ phy->link_speed = EMAC_LINK_SPEED_UNKNOWN;
+ emac_tx_q_descs_free_all(adpt);
+ emac_rx_q_free_descs_all(adpt);
+}
+
+/* Consume next received packet descriptor */
+static bool emac_rx_process_rrd(struct emac_adapter *adpt,
+ struct emac_rx_queue *rx_q,
+ struct emac_rrd *rrd)
+{
+ u32 *hw_rrd = EMAC_RRD(rx_q, adpt->rrd_size,
+ rx_q->rrd.consume_idx);
+
+ /* If time stamping is enabled, it will be added in the beginning of
+ * the hw rrd (hw_rrd). In sw rrd (rrd), 32bit words 4 & 5 are reserved
+ * for the time stamp; hence the conversion.
+ * Also, read the rrd word with update flag first; read rest of rrd
+ * only if update flag is set.
+ */
+ if (adpt->timestamp_en)
+ rrd->word[3] = *(hw_rrd + 5);
+ else
+ rrd->word[3] = *(hw_rrd + 3);
+ rmb(); /* ensure hw receive returned descriptor timestamp is read */
+
+ if (!RRD_UPDT(rrd))
+ return false;
+
+ if (adpt->timestamp_en) {
+ rrd->word[4] = *(hw_rrd++);
+ rrd->word[5] = *(hw_rrd++);
+ } else {
+ rrd->word[4] = 0;
+ rrd->word[5] = 0;
+ }
+
+ rrd->word[0] = *(hw_rrd++);
+ rrd->word[1] = *(hw_rrd++);
+ rrd->word[2] = *(hw_rrd++);
+ rmb(); /* ensure descriptor is read */
Why are the rmb()s necessary?
+
+ netif_dbg(adpt, rx_status, adpt->netdev,
+ "RX[%d]:SRRD[%x]: %x:%x:%x:%x:%x:%x\n",
+ rx_q->que_idx, rx_q->rrd.consume_idx, rrd->word[0],
+ rrd->word[1], rrd->word[2], rrd->word[3],
+ rrd->word[4], rrd->word[5]);
+
+ if (unlikely(RRD_NOR(rrd) != 1)) {
+ netdev_err(adpt->netdev,
+ "error: multi-RFD not support yet! nor:%lu\n",
+ RRD_NOR(rrd));
+ }
+
+ /* mark rrd as processed */
+ RRD_UPDT_SET(rrd, 0);
+ *hw_rrd = rrd->word[3];
+
+ if (++rx_q->rrd.consume_idx == rx_q->rrd.count)
+ rx_q->rrd.consume_idx = 0;
+
+ return true;
+}
+
+/* Produce new transmit descriptor */
+static bool emac_tx_tpd_create(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q, struct emac_tpd *tpd)
+{
+ u32 *hw_tpd;
+
+ tx_q->tpd.last_produce_idx = tx_q->tpd.produce_idx;
+ hw_tpd = EMAC_TPD(tx_q, adpt->tpd_size, tx_q->tpd.produce_idx);
+
+ if (++tx_q->tpd.produce_idx == tx_q->tpd.count)
+ tx_q->tpd.produce_idx = 0;
+
+ *(hw_tpd++) = tpd->word[0];
+ *(hw_tpd++) = tpd->word[1];
+ *(hw_tpd++) = tpd->word[2];
+ *hw_tpd = tpd->word[3];
+
+ netif_dbg(adpt, tx_done, adpt->netdev, "TX[%d]:STPD[%x]: %x:%x:%x:%x\n",
+ tx_q->que_idx, tx_q->tpd.last_produce_idx, tpd->word[0],
+ tpd->word[1], tpd->word[2], tpd->word[3]);
+
+ return true;
+}
+
+/* Mark the last transmit descriptor as such (for the transmit packet) */
+static void emac_tx_tpd_mark_last(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q)
+{
+ u32 tmp_tpd;
+ u32 *hw_tpd = EMAC_TPD(tx_q, adpt->tpd_size,
+ tx_q->tpd.last_produce_idx);
+
+ tmp_tpd = *(hw_tpd + 1);
+ tmp_tpd |= EMAC_TPD_LAST_FRAGMENT;
+ *(hw_tpd + 1) = tmp_tpd;
+}
+
+void emac_tx_tpd_ts_save(struct emac_adapter *adpt, struct emac_tx_queue *tx_q)
+{
+ u32 tmp_tpd;
+ u32 *hw_tpd = EMAC_TPD(tx_q, adpt->tpd_size,
+ tx_q->tpd.last_produce_idx);
+
+ tmp_tpd = *(hw_tpd + 3);
+ tmp_tpd |= EMAC_TPD_TSTAMP_SAVE;
+ *(hw_tpd + 3) = tmp_tpd;
+}
+
+static void emac_rx_rfd_clean(struct emac_rx_queue *rx_q,
+ struct emac_rrd *rrd)
+{
+ struct emac_buffer *rfbuf = rx_q->rfd.rfbuff;
+ u32 consume_idx = RRD_SI(rrd);
+ int i;
+
+ for (i = 0; i < RRD_NOR(rrd); i++) {
+ rfbuf[consume_idx].skb = NULL;
+ if (++consume_idx == rx_q->rfd.count)
+ consume_idx = 0;
+ }
+
+ rx_q->rfd.consume_idx = consume_idx;
+ rx_q->rfd.process_idx = consume_idx;
+}
+
+/* proper lock must be acquired before polling */
+static void emac_tx_ts_poll(struct emac_adapter *adpt)
+{
+ struct sk_buff_head *pending_q = &adpt->tx_ts_pending_queue;
+ struct sk_buff_head *q = &adpt->tx_ts_ready_queue;
+ struct sk_buff *skb, *skb_tmp;
+ struct emac_tx_ts tx_ts;
+
+ while (emac_mac_tx_ts_read(adpt, &tx_ts)) {
+ bool found = false;
+
+ adpt->tx_ts_stats.rx++;
+
+ skb_queue_walk_safe(pending_q, skb, skb_tmp) {
+ if (EMAC_SKB_CB(skb)->tpd_idx == tx_ts.ts_idx) {
+ struct sk_buff *pskb;
+
+ EMAC_TX_TS_CB(skb)->sec = tx_ts.sec;
+ EMAC_TX_TS_CB(skb)->ns = tx_ts.ns;
+ /* the tx timestamps for all the pending
+ * packets before this one are lost
+ */
+ while ((pskb = __skb_dequeue(pending_q))
+ != skb) {
+ EMAC_TX_TS_CB(pskb)->sec = 0;
+ EMAC_TX_TS_CB(pskb)->ns = 0;
+ __skb_queue_tail(q, pskb);
+ adpt->tx_ts_stats.lost++;
+ }
+ __skb_queue_tail(q, skb);
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ netif_dbg(adpt, tx_done, adpt->netdev,
+ "no entry(tpd=%d) found, drop tx timestamp\n",
+ tx_ts.ts_idx);
+ adpt->tx_ts_stats.drop++;
+ }
+ }
+
+ skb_queue_walk_safe(pending_q, skb, skb_tmp) {
+ /* No packet after this one expires */
+ if (time_is_after_jiffies(EMAC_SKB_CB(skb)->jiffies +
+ msecs_to_jiffies(100)))
+ break;
+ adpt->tx_ts_stats.timeout++;
+ netif_dbg(adpt, tx_done, adpt->netdev,
+ "tx timestamp timeout: tpd_idx=%d\n",
+ EMAC_SKB_CB(skb)->tpd_idx);
+
+ __skb_unlink(skb, pending_q);
+ EMAC_TX_TS_CB(skb)->sec = 0;
+ EMAC_TX_TS_CB(skb)->ns = 0;
+ __skb_queue_tail(q, skb);
+ }
+}
+
+static void emac_schedule_tx_ts_task(struct emac_adapter *adpt)
+{
+ if (test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ return;
+
+ if (schedule_work(&adpt->tx_ts_task))
+ adpt->tx_ts_stats.sched++;
+}
+
+void emac_mac_tx_ts_periodic_routine(struct work_struct *work)
+{
+ struct emac_adapter *adpt = container_of(work, struct emac_adapter,
+ tx_ts_task);
+ struct sk_buff *skb;
+ struct sk_buff_head q;
+ unsigned long flags;
+
+ adpt->tx_ts_stats.poll++;
+
+ __skb_queue_head_init(&q);
+
+ while (1) {
+ spin_lock_irqsave(&adpt->tx_ts_lock, flags);
+ if (adpt->tx_ts_pending_queue.qlen)
+ emac_tx_ts_poll(adpt);
+ skb_queue_splice_tail_init(&adpt->tx_ts_ready_queue, &q);
+ spin_unlock_irqrestore(&adpt->tx_ts_lock, flags);
+
+ if (!q.qlen)
+ break;
+
+ while ((skb = __skb_dequeue(&q))) {
+ struct emac_tx_ts_cb *cb = EMAC_TX_TS_CB(skb);
+
+ if (cb->sec || cb->ns) {
+ struct skb_shared_hwtstamps ts;
+
+ ts.hwtstamp = ktime_set(cb->sec, cb->ns);
+ skb_tstamp_tx(skb, &ts);
+ adpt->tx_ts_stats.deliver++;
+ }
+ dev_kfree_skb_any(skb);
+ }
+ }
+
+ if (adpt->tx_ts_pending_queue.qlen)
+ emac_schedule_tx_ts_task(adpt);
+}
+
+/* Push the received skb to upper layers */
+static void emac_receive_skb(struct emac_rx_queue *rx_q,
+ struct sk_buff *skb,
+ u16 vlan_tag, bool vlan_flag)
+{
+ if (vlan_flag) {
+ u16 vlan;
+
+ EMAC_TAG_TO_VLAN(vlan_tag, vlan);
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
+ }
+
+ napi_gro_receive(&rx_q->napi, skb);
+}
+
+/* Process receive event */
+void emac_mac_rx_process(struct emac_adapter *adpt, struct emac_rx_queue *rx_q,
+ int *num_pkts, int max_pkts)
+{
+ struct net_device *netdev = adpt->netdev;
+
+ struct emac_rrd rrd;
+ struct emac_buffer *rfbuf;
+ struct sk_buff *skb;
+
+ u32 hw_consume_idx, num_consume_pkts;
+ unsigned int count = 0;
+ u32 proc_idx;
+ u32 reg = readl_relaxed(adpt->base + rx_q->consume_reg);
+
+ hw_consume_idx = (reg & rx_q->consume_mask) >> rx_q->consume_shft;
+ num_consume_pkts = (hw_consume_idx >= rx_q->rrd.consume_idx) ?
+ (hw_consume_idx - rx_q->rrd.consume_idx) :
+ (hw_consume_idx + rx_q->rrd.count - rx_q->rrd.consume_idx);
+
+ do {
+ if (!num_consume_pkts)
+ break;
+
+ if (!emac_rx_process_rrd(adpt, rx_q, &rrd))
+ break;
+
+ if (likely(RRD_NOR(&rrd) == 1)) {
+ /* good receive */
+ rfbuf = GET_RFD_BUFFER(rx_q, RRD_SI(&rrd));
+ dma_unmap_single(adpt->netdev->dev.parent, rfbuf->dma,
+ rfbuf->length, DMA_FROM_DEVICE);
+ rfbuf->dma = 0;
+ skb = rfbuf->skb;
+ } else {
+ netdev_err(adpt->netdev,
+ "error: multi-RFD not support yet!\n");
+ break;
+ }
+ emac_rx_rfd_clean(rx_q, &rrd);
+ num_consume_pkts--;
+ count++;
+
+ /* Due to a HW issue in L4 check sum detection (UDP/TCP frags
+ * with DF set are marked as error), drop packets based on the
+ * error mask rather than the summary bit (ignoring L4F errors)
+ */
+ if (rrd.word[EMAC_RRD_STATS_DW_IDX] & EMAC_RRD_ERROR) {
+ netif_dbg(adpt, rx_status, adpt->netdev,
+ "Drop error packet[RRD: 0x%x:0x%x:0x%x:0x%x]\n",
+ rrd.word[0], rrd.word[1],
+ rrd.word[2], rrd.word[3]);
+
+ dev_kfree_skb(skb);
+ continue;
+ }
+
+ skb_put(skb, RRD_PKT_SIZE(&rrd) - ETH_FCS_LEN);
+ skb->dev = netdev;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ if (netdev->features & NETIF_F_RXCSUM)
+ skb->ip_summed = (RRD_L4F(&rrd) ?
+ CHECKSUM_NONE : CHECKSUM_UNNECESSARY);
+ else
+ skb_checksum_none_assert(skb);
+
+ if (test_bit(EMAC_STATUS_TS_RX_EN, &adpt->status)) {
+ struct skb_shared_hwtstamps *hwts = skb_hwtstamps(skb);
+
+ hwts->hwtstamp = ktime_set(RRD_TS_HI(&rrd),
+ RRD_TS_LOW(&rrd));
+ }
+
+ emac_receive_skb(rx_q, skb, (u16)RRD_CVALN_TAG(&rrd),
+ (bool)RRD_CVTAG(&rrd));
+
+ netdev->last_rx = jiffies;
+ (*num_pkts)++;
+ } while (*num_pkts < max_pkts);
+
+ if (count) {
+ proc_idx = (rx_q->rfd.process_idx << rx_q->process_shft) &
+ rx_q->process_mask;
+ wmb(); /* ensure that the descriptors are properly cleared */
+ emac_reg_update32(adpt->base + rx_q->process_reg,
+ rx_q->process_mask, proc_idx);
+ wmb(); /* ensure that RFD producer index is flushed to HW */
+ netif_dbg(adpt, rx_status, adpt->netdev,
+ "RX[%d]: proc idx 0x%x\n", rx_q->que_idx,
+ rx_q->rfd.process_idx);
+
+ emac_mac_rx_descs_refill(adpt, rx_q);
+ }
+}
+
+/* Process transmit event */
+void emac_mac_tx_process(struct emac_adapter *adpt, struct emac_tx_queue *tx_q)
+{
+ struct emac_buffer *tpbuf;
+ u32 hw_consume_idx;
+ u32 pkts_compl = 0, bytes_compl = 0;
+ u32 reg = readl_relaxed(adpt->base + tx_q->consume_reg);
+
+ hw_consume_idx = (reg & tx_q->consume_mask) >> tx_q->consume_shft;
+
+ netif_dbg(adpt, tx_done, adpt->netdev, "TX[%d]: cons idx 0x%x\n",
+ tx_q->que_idx, hw_consume_idx);
+
+ while (tx_q->tpd.consume_idx != hw_consume_idx) {
+ tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.consume_idx);
+ if (tpbuf->dma) {
+ dma_unmap_single(adpt->netdev->dev.parent, tpbuf->dma,
+ tpbuf->length, DMA_TO_DEVICE);
+ tpbuf->dma = 0;
+ }
+
+ if (tpbuf->skb) {
+ pkts_compl++;
+ bytes_compl += tpbuf->skb->len;
+ dev_kfree_skb_irq(tpbuf->skb);
+ tpbuf->skb = NULL;
+ }
+
+ if (++tx_q->tpd.consume_idx == tx_q->tpd.count)
+ tx_q->tpd.consume_idx = 0;
+ }
+
+ if (pkts_compl || bytes_compl)
+ netdev_completed_queue(adpt->netdev, pkts_compl, bytes_compl);
+}
+
+/* Initialize all queue data structures */
+void emac_mac_rx_tx_ring_init_all(struct platform_device *pdev,
+ struct emac_adapter *adpt)
+{
+ int que_idx;
+
+ adpt->tx_q_cnt = EMAC_DEF_TX_QUEUES;
+ adpt->rx_q_cnt = EMAC_DEF_RX_QUEUES;
+
+ for (que_idx = 0; que_idx < adpt->tx_q_cnt; que_idx++)
+ adpt->tx_q[que_idx].que_idx = que_idx;
+
+ for (que_idx = 0; que_idx < adpt->rx_q_cnt; que_idx++) {
+ struct emac_rx_queue *rx_q = &adpt->rx_q[que_idx];
+
+ rx_q->que_idx = que_idx;
+ rx_q->netdev = adpt->netdev;
+ }
+
+ switch (adpt->rx_q_cnt) {
+ case 4:
+ adpt->rx_q[3].produce_reg = EMAC_MAILBOX_13;
+ adpt->rx_q[3].produce_mask = RFD3_PROD_IDX_BMSK;
+ adpt->rx_q[3].produce_shft = RFD3_PROD_IDX_SHFT;
+
+ adpt->rx_q[3].process_reg = EMAC_MAILBOX_13;
+ adpt->rx_q[3].process_mask = RFD3_PROC_IDX_BMSK;
+ adpt->rx_q[3].process_shft = RFD3_PROC_IDX_SHFT;
+
+ adpt->rx_q[3].consume_reg = EMAC_MAILBOX_8;
+ adpt->rx_q[3].consume_mask = RFD3_CONS_IDX_BMSK;
+ adpt->rx_q[3].consume_shft = RFD3_CONS_IDX_SHFT;
+
+ adpt->rx_q[3].irq = &adpt->irq[3];
+ adpt->rx_q[3].intr = adpt->irq[3].mask & ISR_RX_PKT;
+
+ /* fall through */
+ case 3:
+ adpt->rx_q[2].produce_reg = EMAC_MAILBOX_6;
+ adpt->rx_q[2].produce_mask = RFD2_PROD_IDX_BMSK;
+ adpt->rx_q[2].produce_shft = RFD2_PROD_IDX_SHFT;
+
+ adpt->rx_q[2].process_reg = EMAC_MAILBOX_6;
+ adpt->rx_q[2].process_mask = RFD2_PROC_IDX_BMSK;
+ adpt->rx_q[2].process_shft = RFD2_PROC_IDX_SHFT;
+
+ adpt->rx_q[2].consume_reg = EMAC_MAILBOX_7;
+ adpt->rx_q[2].consume_mask = RFD2_CONS_IDX_BMSK;
+ adpt->rx_q[2].consume_shft = RFD2_CONS_IDX_SHFT;
+
+ adpt->rx_q[2].irq = &adpt->irq[2];
+ adpt->rx_q[2].intr = adpt->irq[2].mask & ISR_RX_PKT;
+
+ /* fall through */
+ case 2:
+ adpt->rx_q[1].produce_reg = EMAC_MAILBOX_5;
+ adpt->rx_q[1].produce_mask = RFD1_PROD_IDX_BMSK;
+ adpt->rx_q[1].produce_shft = RFD1_PROD_IDX_SHFT;
+
+ adpt->rx_q[1].process_reg = EMAC_MAILBOX_5;
+ adpt->rx_q[1].process_mask = RFD1_PROC_IDX_BMSK;
+ adpt->rx_q[1].process_shft = RFD1_PROC_IDX_SHFT;
+
+ adpt->rx_q[1].consume_reg = EMAC_MAILBOX_7;
+ adpt->rx_q[1].consume_mask = RFD1_CONS_IDX_BMSK;
+ adpt->rx_q[1].consume_shft = RFD1_CONS_IDX_SHFT;
+
+ adpt->rx_q[1].irq = &adpt->irq[1];
+ adpt->rx_q[1].intr = adpt->irq[1].mask & ISR_RX_PKT;
+
+ /* fall through */
+ case 1:
+ adpt->rx_q[0].produce_reg = EMAC_MAILBOX_0;
+ adpt->rx_q[0].produce_mask = RFD0_PROD_IDX_BMSK;
+ adpt->rx_q[0].produce_shft = RFD0_PROD_IDX_SHFT;
+
+ adpt->rx_q[0].process_reg = EMAC_MAILBOX_0;
+ adpt->rx_q[0].process_mask = RFD0_PROC_IDX_BMSK;
+ adpt->rx_q[0].process_shft = RFD0_PROC_IDX_SHFT;
+
+ adpt->rx_q[0].consume_reg = EMAC_MAILBOX_3;
+ adpt->rx_q[0].consume_mask = RFD0_CONS_IDX_BMSK;
+ adpt->rx_q[0].consume_shft = RFD0_CONS_IDX_SHFT;
+
+ adpt->rx_q[0].irq = &adpt->irq[0];
+ adpt->rx_q[0].intr = adpt->irq[0].mask & ISR_RX_PKT;
+ break;
+ }
+
+ switch (adpt->tx_q_cnt) {
+ case 4:
+ adpt->tx_q[3].produce_reg = EMAC_MAILBOX_11;
+ adpt->tx_q[3].produce_mask = H3TPD_PROD_IDX_BMSK;
+ adpt->tx_q[3].produce_shft = H3TPD_PROD_IDX_SHFT;
+
+ adpt->tx_q[3].consume_reg = EMAC_MAILBOX_12;
+ adpt->tx_q[3].consume_mask = H3TPD_CONS_IDX_BMSK;
+ adpt->tx_q[3].consume_shft = H3TPD_CONS_IDX_SHFT;
+
+ /* fall through */
+ case 3:
+ adpt->tx_q[2].produce_reg = EMAC_MAILBOX_9;
+ adpt->tx_q[2].produce_mask = H2TPD_PROD_IDX_BMSK;
+ adpt->tx_q[2].produce_shft = H2TPD_PROD_IDX_SHFT;
+
+ adpt->tx_q[2].consume_reg = EMAC_MAILBOX_10;
+ adpt->tx_q[2].consume_mask = H2TPD_CONS_IDX_BMSK;
+ adpt->tx_q[2].consume_shft = H2TPD_CONS_IDX_SHFT;
+
+ /* fall through */
+ case 2:
+ adpt->tx_q[1].produce_reg = EMAC_MAILBOX_16;
+ adpt->tx_q[1].produce_mask = H1TPD_PROD_IDX_BMSK;
+ adpt->tx_q[1].produce_shft = H1TPD_PROD_IDX_SHFT;
+
+ adpt->tx_q[1].consume_reg = EMAC_MAILBOX_10;
+ adpt->tx_q[1].consume_mask = H1TPD_CONS_IDX_BMSK;
+ adpt->tx_q[1].consume_shft = H1TPD_CONS_IDX_SHFT;
+
+ /* fall through */
+ case 1:
+ adpt->tx_q[0].produce_reg = EMAC_MAILBOX_15;
+ adpt->tx_q[0].produce_mask = NTPD_PROD_IDX_BMSK;
+ adpt->tx_q[0].produce_shft = NTPD_PROD_IDX_SHFT;
+
+ adpt->tx_q[0].consume_reg = EMAC_MAILBOX_2;
+ adpt->tx_q[0].consume_mask = NTPD_CONS_IDX_BMSK;
+ adpt->tx_q[0].consume_shft = NTPD_CONS_IDX_SHFT;
+ break;
+ }
+}
+
+/* get the number of free transmit descriptors */
+static u32 emac_tpd_num_free_descs(struct emac_tx_queue *tx_q)
+{
+ u32 produce_idx = tx_q->tpd.produce_idx;
+ u32 consume_idx = tx_q->tpd.consume_idx;
+
+ return (consume_idx > produce_idx) ?
+ (consume_idx - produce_idx - 1) :
+ (tx_q->tpd.count + consume_idx - produce_idx - 1);
+}
+
+/* Check if enough transmit descriptors are available */
+static bool emac_tx_has_enough_descs(struct emac_tx_queue *tx_q,
+ const struct sk_buff *skb)
+{
+ u32 num_required = 1;
+ int i;
+ u16 proto_hdr_len = 0;
+
+ if (skb_is_gso(skb)) {
+ proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ if (proto_hdr_len < skb_headlen(skb))
+ num_required++;
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
+ num_required++;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ num_required++;
+
+ return num_required < emac_tpd_num_free_descs(tx_q);
+}
+
+/* Fill up transmit descriptors with TSO and Checksum offload information */
+static int emac_tso_csum(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q,
+ struct sk_buff *skb,
+ struct emac_tpd *tpd)
+{
+ u8 hdr_len;
+ int retval;
+
+ if (skb_is_gso(skb)) {
+ if (skb_header_cloned(skb)) {
+ retval = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+ if (unlikely(retval))
+ return retval;
+ }
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ u32 pkt_len = ((unsigned char *)ip_hdr(skb) - skb->data)
+ + ntohs(ip_hdr(skb)->tot_len);
+ if (skb->len > pkt_len)
+ pskb_trim(skb, pkt_len);
+ }
+
+ hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ if (unlikely(skb->len == hdr_len)) {
+ /* we only need to do csum */
+ netif_warn(adpt, tx_err, adpt->netdev,
+ "tso not needed for packet with 0 data\n");
+ goto do_csum;
+ }
+
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) {
+ ip_hdr(skb)->check = 0;
+ tcp_hdr(skb)->check = ~csum_tcpudp_magic(
+ ip_hdr(skb)->saddr,
+ ip_hdr(skb)->daddr,
+ 0, IPPROTO_TCP, 0);
+ TPD_IPV4_SET(tpd, 1);
+ }
+
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) {
+ /* ipv6 tso need an extra tpd */
+ struct emac_tpd extra_tpd;
+
+ memset(tpd, 0, sizeof(*tpd));
+ memset(&extra_tpd, 0, sizeof(extra_tpd));
+
+ ipv6_hdr(skb)->payload_len = 0;
+ tcp_hdr(skb)->check = ~csum_ipv6_magic(
+ &ipv6_hdr(skb)->saddr,
+ &ipv6_hdr(skb)->daddr,
+ 0, IPPROTO_TCP, 0);
+ TPD_PKT_LEN_SET(&extra_tpd, skb->len);
+ TPD_LSO_SET(&extra_tpd, 1);
+ TPD_LSOV_SET(&extra_tpd, 1);
+ emac_tx_tpd_create(adpt, tx_q, &extra_tpd);
+ TPD_LSOV_SET(tpd, 1);
+ }
+
+ TPD_LSO_SET(tpd, 1);
+ TPD_TCPHDR_OFFSET_SET(tpd, skb_transport_offset(skb));
+ TPD_MSS_SET(tpd, skb_shinfo(skb)->gso_size);
+ return 0;
+ }
+
+do_csum:
+ if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
+ u8 css, cso;
+
+ cso = skb_transport_offset(skb);
+ if (unlikely(cso & 0x1)) {
+ netdev_err(adpt->netdev,
+ "error: payload offset should be even\n");
+ return -EINVAL;
+ }
+ css = cso + skb->csum_offset;
+
+ TPD_PAYLOAD_OFFSET_SET(tpd, cso >> 1);
+ TPD_CXSUM_OFFSET_SET(tpd, css >> 1);
+ TPD_CSX_SET(tpd, 1);
+ }
+
+ return 0;
+}
+
+/* Fill up transmit descriptors */
+static void emac_tx_fill_tpd(struct emac_adapter *adpt,
+ struct emac_tx_queue *tx_q, struct sk_buff *skb,
+ struct emac_tpd *tpd)
+{
+ struct emac_buffer *tpbuf = NULL;
+ u16 nr_frags = skb_shinfo(skb)->nr_frags;
+ u32 len = skb_headlen(skb);
+ u16 map_len = 0;
+ u16 mapped_len = 0;
+ u16 hdr_len = 0;
+ int i;
+
+ /* if Large Segment Offload is (in TCP Segmentation Offload struct) */
+ if (TPD_LSO(tpd)) {
+ hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ map_len = hdr_len;
+
+ tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
+ tpbuf->length = map_len;
+ tpbuf->dma = dma_map_single(adpt->netdev->dev.parent, skb->data,
+ hdr_len, DMA_TO_DEVICE);
+ mapped_len += map_len;
+ TPD_BUFFER_ADDR_L_SET(tpd, EMAC_DMA_ADDR_LO(tpbuf->dma));
+ TPD_BUFFER_ADDR_H_SET(tpd, EMAC_DMA_ADDR_HI(tpbuf->dma));
+ TPD_BUF_LEN_SET(tpd, tpbuf->length);
+ emac_tx_tpd_create(adpt, tx_q, tpd);
+ }
+
+ if (mapped_len < len) {
+ tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
+ tpbuf->length = len - mapped_len;
+ tpbuf->dma = dma_map_single(adpt->netdev->dev.parent,
+ skb->data + mapped_len,
+ tpbuf->length, DMA_TO_DEVICE);
+ TPD_BUFFER_ADDR_L_SET(tpd, EMAC_DMA_ADDR_LO(tpbuf->dma));
+ TPD_BUFFER_ADDR_H_SET(tpd, EMAC_DMA_ADDR_HI(tpbuf->dma));
+ TPD_BUF_LEN_SET(tpd, tpbuf->length);
+ emac_tx_tpd_create(adpt, tx_q, tpd);
+ }
+
+ for (i = 0; i < nr_frags; i++) {
+ struct skb_frag_struct *frag;
+
+ frag = &skb_shinfo(skb)->frags[i];
+
+ tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
+ tpbuf->length = frag->size;
+ tpbuf->dma = dma_map_page(adpt->netdev->dev.parent,
+ frag->page.p, frag->page_offset,
+ tpbuf->length, DMA_TO_DEVICE);
+ TPD_BUFFER_ADDR_L_SET(tpd, EMAC_DMA_ADDR_LO(tpbuf->dma));
+ TPD_BUFFER_ADDR_H_SET(tpd, EMAC_DMA_ADDR_HI(tpbuf->dma));
+ TPD_BUF_LEN_SET(tpd, tpbuf->length);
+ emac_tx_tpd_create(adpt, tx_q, tpd);
+ }
+
+ /* The last tpd */
+ emac_tx_tpd_mark_last(adpt, tx_q);
+
+ if (test_bit(EMAC_STATUS_TS_TX_EN, &adpt->status) &&
+ (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
+ struct sk_buff *skb_ts = skb_clone(skb, GFP_ATOMIC);
+
+ if (likely(skb_ts)) {
+ unsigned long flags;
+
+ emac_tx_tpd_ts_save(adpt, tx_q);
+ skb_ts->sk = skb->sk;
+ EMAC_SKB_CB(skb_ts)->tpd_idx =
+ tx_q->tpd.last_produce_idx;
+ EMAC_SKB_CB(skb_ts)->jiffies = get_jiffies_64();
+ skb_shinfo(skb_ts)->tx_flags |= SKBTX_IN_PROGRESS;
+ spin_lock_irqsave(&adpt->tx_ts_lock, flags);
+ if (adpt->tx_ts_pending_queue.qlen >=
+ EMAC_TX_POLL_HWTXTSTAMP_THRESHOLD) {
+ emac_tx_ts_poll(adpt);
+ adpt->tx_ts_stats.tx_poll++;
+ }
+ __skb_queue_tail(&adpt->tx_ts_pending_queue,
+ skb_ts);
+ spin_unlock_irqrestore(&adpt->tx_ts_lock, flags);
+ adpt->tx_ts_stats.tx++;
+ emac_schedule_tx_ts_task(adpt);
+ }
+ }
+
+ /* The last buffer info contain the skb address,
+ * so it will be freed after unmap
+ */
+ tpbuf->skb = skb;
+}
+
+/* Transmit the packet using specified transmit queue */
+int emac_mac_tx_buf_send(struct emac_adapter *adpt, struct emac_tx_queue *tx_q,
+ struct sk_buff *skb)
+{
+ struct emac_tpd tpd;
+ u32 prod_idx;
+
+ if (test_bit(EMAC_STATUS_DOWN, &adpt->status)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ if (!emac_tx_has_enough_descs(tx_q, skb)) {
+ /* not enough descriptors, just stop queue */
+ netif_stop_queue(adpt->netdev);
+ return NETDEV_TX_BUSY;
+ }
+
+ memset(&tpd, 0, sizeof(tpd));
+
+ if (emac_tso_csum(adpt, tx_q, skb, &tpd) != 0) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ if (skb_vlan_tag_present(skb)) {
+ u16 tag;
+
+ EMAC_VLAN_TO_TAG(skb_vlan_tag_get(skb), tag);
+ TPD_CVLAN_TAG_SET(&tpd, tag);
+ TPD_INSTC_SET(&tpd, 1);
+ }
+
+ if (skb_network_offset(skb) != ETH_HLEN)
+ TPD_TYP_SET(&tpd, 1);
+
+ emac_tx_fill_tpd(adpt, tx_q, skb, &tpd);
+
+ netdev_sent_queue(adpt->netdev, skb->len);
+
+ /* update produce idx */
+ prod_idx = (tx_q->tpd.produce_idx << tx_q->produce_shft) &
+ tx_q->produce_mask;
+ emac_reg_update32(adpt->base + tx_q->produce_reg,
+ tx_q->produce_mask, prod_idx);
+ wmb(); /* ensure that RFD producer index is flushed to HW */
+ netif_dbg(adpt, tx_queued, adpt->netdev, "TX[%d]: prod idx 0x%x\n",
+ tx_q->que_idx, tx_q->tpd.produce_idx);
+
+ return NETDEV_TX_OK;
+}
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.h b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
new file mode 100644
index 0000000..06afef6
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
@@ -0,0 +1,287 @@
+/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* EMAC DMA HW engine uses three rings:
+ * Tx:
+ * TPD: Transmit Packet Descriptor ring.
+ * Rx:
+ * RFD: Receive Free Descriptor ring.
+ * Ring of descriptors with empty buffers to be filled by Rx HW.
+ * RRD: Receive Return Descriptor ring.
+ * Ring of descriptors with buffers filled with received data.
+ */
+
+#ifndef _EMAC_HW_H_
+#define _EMAC_HW_H_
+
+/* EMAC_CSR register offsets */
+#define EMAC_EMAC_WRAPPER_CSR1 0x000000
+#define EMAC_EMAC_WRAPPER_CSR2 0x000004
+#define EMAC_EMAC_WRAPPER_TX_TS_LO 0x000104
+#define EMAC_EMAC_WRAPPER_TX_TS_HI 0x000108
+#define EMAC_EMAC_WRAPPER_TX_TS_INX 0x00010c
+
+/* DMA Order Settings */
+enum emac_dma_order {
+ emac_dma_ord_in = 1,
+ emac_dma_ord_enh = 2,
+ emac_dma_ord_out = 4
+};
+
+enum emac_mac_speed {
+ emac_mac_speed_0 = 0,
+ emac_mac_speed_10_100 = 1,
+ emac_mac_speed_1000 = 2
+};
+
+enum emac_dma_req_block {
+ emac_dma_req_128 = 0,
+ emac_dma_req_256 = 1,
+ emac_dma_req_512 = 2,
+ emac_dma_req_1024 = 3,
+ emac_dma_req_2048 = 4,
+ emac_dma_req_4096 = 5
+};
+
+/* Returns the value of bits idx...idx+n_bits */
+#define BITS_MASK(idx, n_bits) (((((unsigned long)1) << (n_bits)) - 1) << (idx))
+#define BITS_GET(val, idx, n_bits) (((val) & BITS_MASK(idx, n_bits)) >> idx)
+#define BITS_SET(val, idx, n_bits, new_val) \
+ ((val) = (((val) & (~BITS_MASK(idx, n_bits))) | \
+ (((new_val) << (idx)) & BITS_MASK(idx, n_bits))))
+
+/* RRD (Receive Return Descriptor) */
+struct emac_rrd {
+ u32 word[6];
+
+/* number of RFD */
+#define RRD_NOR(rrd) BITS_GET((rrd)->word[0], 16, 4)
+/* start consumer index of rfd-ring */
+#define RRD_SI(rrd) BITS_GET((rrd)->word[0], 20, 12)
+/* vlan-tag (CVID, CFI and PRI) */
+#define RRD_CVALN_TAG(rrd) BITS_GET((rrd)->word[2], 0, 16)
+/* length of the packet */
+#define RRD_PKT_SIZE(rrd) BITS_GET((rrd)->word[3], 0, 14)
+/* L4(TCP/UDP) checksum failed */
+#define RRD_L4F(rrd) BITS_GET((rrd)->word[3], 14, 1)
+/* vlan tagged */
+#define RRD_CVTAG(rrd) BITS_GET((rrd)->word[3], 16, 1)
+/* When set, indicates that the descriptor is updated by the IP core.
+ * When cleared, indicates that the descriptor is invalid.
+ */
+#define RRD_UPDT(rrd) BITS_GET((rrd)->word[3], 31, 1)
+#define RRD_UPDT_SET(rrd, val) BITS_SET((rrd)->word[3], 31, 1, val)
+/* timestamp low */
+#define RRD_TS_LOW(rrd) BITS_GET((rrd)->word[4], 0, 30)
+/* timestamp high */
+#define RRD_TS_HI(rrd) ((rrd)->word[5])
+};
+
+/* RFD (Receive Free Descriptor) */
+union emac_rfd {
+ u64 addr;
+ u32 word[2];
+};
+
+/* TPD (Transmit Packet Descriptor) */
+struct emac_tpd {
+ u32 word[4];
+
+/* Number of bytes of the transmit packet. (include 4-byte CRC) */
+#define TPD_BUF_LEN_SET(tpd, val) BITS_SET((tpd)->word[0], 0, 16, val)
+/* Custom Checksum Offload: When set, ask IP core to offload custom checksum */
+#define TPD_CSX_SET(tpd, val) BITS_SET((tpd)->word[1], 8, 1, val)
+/* TCP Large Send Offload: When set, ask IP core to do offload TCP Large Send */
+#define TPD_LSO(tpd) BITS_GET((tpd)->word[1], 12, 1)
+#define TPD_LSO_SET(tpd, val) BITS_SET((tpd)->word[1], 12, 1, val)
+/* Large Send Offload Version: When set, indicates this is an LSOv2
+ * (for both IPv4 and IPv6). When cleared, indicates this is an LSOv1
+ * (only for IPv4).
+ */
+#define TPD_LSOV_SET(tpd, val) BITS_SET((tpd)->word[1], 13, 1, val)
+/* IPv4 packet: When set, indicates this is an IPv4 packet, this bit is only
+ * for LSOV2 format.
+ */
+#define TPD_IPV4_SET(tpd, val) BITS_SET((tpd)->word[1], 16, 1, val)
+/* 0: Ethernet frame (DA+SA+TYPE+DATA+CRC)
+ * 1: IEEE 802.3 frame (DA+SA+LEN+DSAP+SSAP+CTL+ORG+TYPE+DATA+CRC)
+ */
+#define TPD_TYP_SET(tpd, val) BITS_SET((tpd)->word[1], 17, 1, val)
+/* Low-32bit Buffer Address */
+#define TPD_BUFFER_ADDR_L_SET(tpd, val) ((tpd)->word[2] = (val))
+/* CVLAN Tag to be inserted if INS_VLAN_TAG is set, CVLAN TPID based on global
+ * register configuration.
+ */
+#define TPD_CVLAN_TAG_SET(tpd, val) BITS_SET((tpd)->word[3], 0, 16, val)
+/* Insert CVlan Tag: When set, ask MAC to insert CVLAN TAG to outgoing packet
+ */
+#define TPD_INSTC_SET(tpd, val) BITS_SET((tpd)->word[3], 17, 1, val)
+/* High-14bit Buffer Address, So, the 64b-bit address is
+ * {DESC_CTRL_11_TX_DATA_HIADDR[17:0],(register) BUFFER_ADDR_H, BUFFER_ADDR_L}
+ */
+#define TPD_BUFFER_ADDR_H_SET(tpd, val) BITS_SET((tpd)->word[3], 18, 13, val)
+/* Format D. Word offset from the 1st byte of this packet to start to calculate
+ * the custom checksum.
+ */
+#define TPD_PAYLOAD_OFFSET_SET(tpd, val) BITS_SET((tpd)->word[1], 0, 8, val)
+/* Format D. Word offset from the 1st byte of this packet to fill the custom
+ * checksum to
+ */
+#define TPD_CXSUM_OFFSET_SET(tpd, val) BITS_SET((tpd)->word[1], 18, 8, val)
+
+/* Format C. TCP Header offset from the 1st byte of this packet. (byte unit) */
+#define TPD_TCPHDR_OFFSET_SET(tpd, val) BITS_SET((tpd)->word[1], 0, 8, val)
+/* Format C. MSS (Maximum Segment Size) got from the protocol layer. (byte unit)
+ */
+#define TPD_MSS_SET(tpd, val) BITS_SET((tpd)->word[1], 18, 13, val)
+/* packet length in ext tpd */
+#define TPD_PKT_LEN_SET(tpd, val) ((tpd)->word[2] = (val))
+};
+
+/* emac_ring_header represents a single, contiguous block of DMA space
+ * mapped for the three descriptor rings (tpd, rfd, rrd)
+ */
+struct emac_ring_header {
+ void *v_addr; /* virtual address */
+ dma_addr_t p_addr; /* physical address */
+ size_t size; /* length in bytes */
+ size_t used;
+};
+
+/* emac_buffer is wrapper around a pointer to a socket buffer
+ * so a DMA handle can be stored along with the skb
+ */
+struct emac_buffer {
+ struct sk_buff *skb; /* socket buffer */
+ u16 length; /* rx buffer length */
+ dma_addr_t dma;
+};
+
+/* receive free descriptor (rfd) ring */
+struct emac_rfd_ring {
+ struct emac_buffer *rfbuff;
+ u32 __iomem *v_addr; /* virtual address */
+ dma_addr_t p_addr; /* physical address */
+ u64 size; /* length in bytes */
+ u32 count; /* number of desc in the ring */
+ u32 produce_idx;
+ u32 process_idx;
+ u32 consume_idx; /* unused */
+};
+
+/* Receive Return Desciptor (RRD) ring */
+struct emac_rrd_ring {
+ u32 __iomem *v_addr; /* virtual address */
+ dma_addr_t p_addr; /* physical address */
+ u64 size; /* length in bytes */
+ u32 count; /* number of desc in the ring */
+ u32 produce_idx; /* unused */
+ u32 consume_idx;
+};
+
+/* Rx queue */
+struct emac_rx_queue {
+ struct net_device *netdev; /* netdev ring belongs to */
+ struct emac_rrd_ring rrd;
+ struct emac_rfd_ring rfd;
+ struct napi_struct napi;
+
+ u16 que_idx; /* index in multi rx queues*/
+ u16 produce_reg;
+ u32 produce_mask;
+ u8 produce_shft;
+
+ u16 process_reg;
+ u32 process_mask;
+ u8 process_shft;
+
+ u16 consume_reg;
+ u32 consume_mask;
+ u8 consume_shft;
+
+ u32 intr;
+ struct emac_irq *irq;
+};
+
+/* Transimit Packet Descriptor (tpd) ring */
+struct emac_tpd_ring {
+ struct emac_buffer *tpbuff;
+ u32 __iomem *v_addr; /* virtual address */
+ dma_addr_t p_addr; /* physical address */
dma_addr_t is a bus address, not a physical address. So is the type
wrong, or the comment?
+
+ u64 size; /* length in bytes */
+ u32 count; /* number of desc in the ring */
+ u32 produce_idx;
+ u32 consume_idx;
+ u32 last_produce_idx;
+};
+
+/* Tx queue */
+struct emac_tx_queue {
+ struct emac_tpd_ring tpd;
+
+ u16 que_idx; /* for multiqueue management */
+ u16 max_packets; /* max packets per interrupt */
+ u16 produce_reg;
+ u32 produce_mask;
+ u8 produce_shft;
+
+ u16 consume_reg;
+ u32 consume_mask;
+ u8 consume_shft;
+};
So this structure is not packed, since produce_mask is unaligned. Is
this supposed to match a hardware buffer? If not, can you rearrange the
fields so that they are packed?
Also, can you spell out "shift"? Dropping one letter seems silly.
+
+/* HW tx timestamp */
+struct emac_tx_ts {
+ u32 ts_idx;
+ u32 sec;
+ u32 ns;
+};
+
+/* Tx timestamp statistics */
+struct emac_tx_ts_stats {
+ u32 tx;
+ u32 rx;
+ u32 deliver;
+ u32 drop;
+ u32 lost;
+ u32 timeout;
+ u32 sched;
+ u32 poll;
+ u32 tx_poll;
+};
+
+struct emac_adapter;
+
+int emac_mac_up(struct emac_adapter *adpt);
+void emac_mac_down(struct emac_adapter *adpt, bool reset);
+void emac_mac_reset(struct emac_adapter *adpt);
+void emac_mac_start(struct emac_adapter *adpt);
+void emac_mac_stop(struct emac_adapter *adpt);
+void emac_mac_addr_clear(struct emac_adapter *adpt, u8 *addr);
+void emac_mac_pm(struct emac_adapter *adpt, u32 speed, bool wol_en, bool rx_en);
+void emac_mac_mode_config(struct emac_adapter *adpt);
+void emac_mac_wol_config(struct emac_adapter *adpt, u32 wufc);
+void emac_mac_rx_process(struct emac_adapter *adpt, struct emac_rx_queue *rx_q,
+ int *num_pkts, int max_pkts);
+int emac_mac_tx_buf_send(struct emac_adapter *adpt, struct emac_tx_queue *tx_q,
+ struct sk_buff *skb);
+void emac_mac_tx_process(struct emac_adapter *adpt, struct emac_tx_queue *tx_q);
+void emac_mac_rx_tx_ring_init_all(struct platform_device *pdev,
+ struct emac_adapter *adpt);
+int emac_mac_rx_tx_rings_alloc_all(struct emac_adapter *adpt);
+void emac_mac_rx_tx_rings_free_all(struct emac_adapter *adpt);
+void emac_mac_tx_ts_periodic_routine(struct work_struct *work);
+void emac_mac_multicast_addr_clear(struct emac_adapter *adpt);
+void emac_mac_multicast_addr_set(struct emac_adapter *adpt, u8 *addr);
+
+#endif /*_EMAC_HW_H_*/
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-phy.c b/drivers/net/ethernet/qualcomm/emac/emac-phy.c
new file mode 100644
index 0000000..45571a5
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-phy.c
@@ -0,0 +1,529 @@
+/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Qualcomm Technologies, Inc. EMAC PHY Controller driver.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/pm_runtime.h>
+#include <linux/phy.h>
+#include "emac.h"
+#include "emac-mac.h"
+#include "emac-phy.h"
+#include "emac-sgmii.h"
+
+/* EMAC base register offsets */
+#define EMAC_MDIO_CTRL 0x001414
+#define EMAC_PHY_STS 0x001418
+#define EMAC_MDIO_EX_CTRL 0x001440
+
+/* EMAC_MDIO_CTRL */
+#define MDIO_MODE 0x40000000
+#define MDIO_PR 0x20000000
+#define MDIO_AP_EN 0x10000000
+#define MDIO_BUSY 0x8000000
+#define MDIO_CLK_SEL_BMSK 0x7000000
+#define MDIO_CLK_SEL_SHFT 24
+#define MDIO_START 0x800000
+#define SUP_PREAMBLE 0x400000
+#define MDIO_RD_NWR 0x200000
+#define MDIO_REG_ADDR_BMSK 0x1f0000
+#define MDIO_REG_ADDR_SHFT 16
+#define MDIO_DATA_BMSK 0xffff
+#define MDIO_DATA_SHFT 0
+
+/* EMAC_PHY_STS */
+#define PHY_ADDR_BMSK 0x1f0000
+#define PHY_ADDR_SHFT 16
+
+/* EMAC_MDIO_EX_CTRL */
+#define DEVAD_BMSK 0x1f0000
+#define DEVAD_SHFT 16
+#define EX_REG_ADDR_BMSK 0xffff
+#define EX_REG_ADDR_SHFT 0
+
+#define MDIO_CLK_25_4 0
+#define MDIO_CLK_25_28 7
+
+#define MDIO_WAIT_TIMES 1000
+
+/* PHY */
+#define MII_PSSR 0x11 /* PHY Specific Status Reg */
+
+/* MII_BMCR (0x00) */
+#define BMCR_SPEED10 0x0000
+
+/* MII_PSSR (0x11) */
+#define PSSR_SPD_DPLX_RESOLVED 0x0800 /* 1=Speed & Duplex resolved */
+#define PSSR_DPLX 0x2000 /* 1=Duplex 0=Half Duplex */
+#define PSSR_SPEED 0xC000 /* Speed, bits 14:15 */
+#define PSSR_10MBS 0x0000 /* 00=10Mbs */
+#define PSSR_100MBS 0x4000 /* 01=100Mbs */
+#define PSSR_1000MBS 0x8000 /* 10=1000Mbs */
+
+#define EMAC_LINK_SPEED_DEFAULT (\
+ EMAC_LINK_SPEED_10_HALF |\
+ EMAC_LINK_SPEED_10_FULL |\
+ EMAC_LINK_SPEED_100_HALF |\
+ EMAC_LINK_SPEED_100_FULL |\
+ EMAC_LINK_SPEED_1GB_FULL)
+
+static int emac_phy_mdio_autopoll_disable(struct emac_adapter *adpt)
+{
+ int i;
+ u32 val;
+
+ emac_reg_update32(adpt->base + EMAC_MDIO_CTRL, MDIO_AP_EN, 0);
+ wmb(); /* ensure mdio autopoll disable is requested */
+
+ /* wait for any mdio polling to complete */
+ for (i = 0; i < MDIO_WAIT_TIMES; i++) {
+ val = readl_relaxed(adpt->base + EMAC_MDIO_CTRL);
+ if (!(val & MDIO_BUSY))
+ return 0;
+
+ usleep_range(100, 150);
+ }
Please use readl_poll_timeout() instead.
+
+ /* failed to disable; ensure it is enabled before returning */
+ emac_reg_update32(adpt->base + EMAC_MDIO_CTRL, 0, MDIO_AP_EN);
+ wmb(); /* ensure mdio autopoll is enabled */
+ return -EBUSY;
+}
+
+static void emac_phy_mdio_autopoll_enable(struct emac_adapter *adpt)
+{
+ emac_reg_update32(adpt->base + EMAC_MDIO_CTRL, 0, MDIO_AP_EN);
+ wmb(); /* ensure mdio autopoll is enabled */
+}
+
+int emac_phy_read_reg(struct emac_adapter *adpt, bool ext, u8 dev, bool fast,
+ u16 reg_addr, u16 *phy_data)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 clk_sel, val = 0;
+ int i;
+ int ret = 0;
+
+ *phy_data = 0;
+ clk_sel = fast ? MDIO_CLK_25_4 : MDIO_CLK_25_28;
+
+ if (phy->external) {
+ ret = emac_phy_mdio_autopoll_disable(adpt);
+ if (ret)
+ return ret;
+ }
+
+ emac_reg_update32(adpt->base + EMAC_PHY_STS, PHY_ADDR_BMSK,
+ (dev << PHY_ADDR_SHFT));
+ wmb(); /* ensure PHY address is set before we proceed */
+
+ if (ext) {
+ val = ((dev << DEVAD_SHFT) & DEVAD_BMSK) |
+ ((reg_addr << EX_REG_ADDR_SHFT) & EX_REG_ADDR_BMSK);
+ writel_relaxed(val, adpt->base + EMAC_MDIO_EX_CTRL);
+ wmb(); /* ensure proper address is set before proceeding */
+
+ val = SUP_PREAMBLE |
+ ((clk_sel << MDIO_CLK_SEL_SHFT) & MDIO_CLK_SEL_BMSK) |
+ MDIO_START | MDIO_MODE | MDIO_RD_NWR;
+ } else {
+ val = val & ~(MDIO_REG_ADDR_BMSK | MDIO_CLK_SEL_BMSK |
+ MDIO_MODE | MDIO_PR);
+ val = SUP_PREAMBLE |
+ ((clk_sel << MDIO_CLK_SEL_SHFT) & MDIO_CLK_SEL_BMSK) |
+ ((reg_addr << MDIO_REG_ADDR_SHFT) & MDIO_REG_ADDR_BMSK) |
+ MDIO_START | MDIO_RD_NWR;
+ }
+
+ writel_relaxed(val, adpt->base + EMAC_MDIO_CTRL);
+ mb(); /* ensure hw starts the operation before we check for result */
+
+ for (i = 0; i < MDIO_WAIT_TIMES; i++) {
+ val = readl_relaxed(adpt->base + EMAC_MDIO_CTRL);
+ if (!(val & (MDIO_START | MDIO_BUSY))) {
+ *phy_data = (u16)((val >> MDIO_DATA_SHFT) &
+ MDIO_DATA_BMSK);
+ break;
+ }
+ usleep_range(100, 150);
+ }
I think you can use readl_poll_timeout() here as well, with a little
creativity.
+
+ if (i == MDIO_WAIT_TIMES)
+ ret = -EIO;
+
+ if (phy->external)
+ emac_phy_mdio_autopoll_enable(adpt);
+
+ return ret;
+}
+
+int emac_phy_write_reg(struct emac_adapter *adpt, bool ext, u8 dev, bool fast,
+ u16 reg_addr, u16 phy_data)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 clk_sel, val = 0;
+ int i;
+ int ret = 0;
+
+ clk_sel = fast ? MDIO_CLK_25_4 : MDIO_CLK_25_28;
+
+ if (phy->external) {
+ ret = emac_phy_mdio_autopoll_disable(adpt);
+ if (ret)
+ return ret;
+ }
+
+ emac_reg_update32(adpt->base + EMAC_PHY_STS, PHY_ADDR_BMSK,
+ (dev << PHY_ADDR_SHFT));
+ wmb(); /* ensure PHY address is set before we proceed */
+
+ if (ext) {
+ val = ((dev << DEVAD_SHFT) & DEVAD_BMSK) |
+ ((reg_addr << EX_REG_ADDR_SHFT) & EX_REG_ADDR_BMSK);
+ writel_relaxed(val, adpt->base + EMAC_MDIO_EX_CTRL);
+ wmb(); /* ensure proper address is set before proceeding */
+
+ val = SUP_PREAMBLE |
+ ((clk_sel << MDIO_CLK_SEL_SHFT) & MDIO_CLK_SEL_BMSK) |
+ ((phy_data << MDIO_DATA_SHFT) & MDIO_DATA_BMSK) |
+ MDIO_START | MDIO_MODE;
+ } else {
+ val = val & ~(MDIO_REG_ADDR_BMSK | MDIO_CLK_SEL_BMSK |
+ MDIO_DATA_BMSK | MDIO_MODE | MDIO_PR);
+ val = SUP_PREAMBLE |
+ ((clk_sel << MDIO_CLK_SEL_SHFT) & MDIO_CLK_SEL_BMSK) |
+ ((reg_addr << MDIO_REG_ADDR_SHFT) & MDIO_REG_ADDR_BMSK) |
+ ((phy_data << MDIO_DATA_SHFT) & MDIO_DATA_BMSK) |
+ MDIO_START;
+ }
+
+ writel_relaxed(val, adpt->base + EMAC_MDIO_CTRL);
+ mb(); /* ensure hw starts the operation before we check for result */
+
+ for (i = 0; i < MDIO_WAIT_TIMES; i++) {
+ val = readl_relaxed(adpt->base + EMAC_MDIO_CTRL);
+ if (!(val & (MDIO_START | MDIO_BUSY)))
+ break;
+ usleep_range(100, 150);
+ }
Please use readl_poll_timeout() instead.
+
+ if (i == MDIO_WAIT_TIMES)
+ ret = -EIO;
+
+ if (phy->external)
+ emac_phy_mdio_autopoll_enable(adpt);
+
+ return ret;
+}
+
+int emac_phy_read(struct emac_adapter *adpt, u16 phy_addr, u16 reg_addr,
+ u16 *phy_data)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int ret;
+
+ mutex_lock(&phy->lock);
+ ret = emac_phy_read_reg(adpt, false, phy_addr, true, reg_addr,
+ phy_data);
+ mutex_unlock(&phy->lock);
+
+ if (ret)
+ netdev_err(adpt->netdev, "error: reading phy reg 0x%02x\n",
+ reg_addr);
+ else
+ netif_dbg(adpt, hw, adpt->netdev,
+ "EMAC PHY RD: 0x%02x -> 0x%04x\n", reg_addr,
+ *phy_data);
+
+ return ret;
+}
+
+int emac_phy_write(struct emac_adapter *adpt, u16 phy_addr, u16 reg_addr,
+ u16 phy_data)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int ret;
+
+ mutex_lock(&phy->lock);
+ ret = emac_phy_write_reg(adpt, false, phy_addr, true, reg_addr,
+ phy_data);
+ mutex_unlock(&phy->lock);
+
+ if (ret)
+ netdev_err(adpt->netdev, "error: writing phy reg 0x%02x\n",
+ reg_addr);
+ else
+ netif_dbg(adpt, hw,
+ adpt->netdev, "EMAC PHY WR: 0x%02x <- 0x%04x\n",
+ reg_addr, phy_data);
+
+ return ret;
+}
+
+/* initialize external phy */
+int emac_phy_external_init(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u16 phy_id[2];
+ int ret = 0;
+
+ if (phy->external) {
+ ret = emac_phy_read(adpt, phy->addr, MII_PHYSID1, &phy_id[0]);
+ if (ret)
+ return ret;
+
+ ret = emac_phy_read(adpt, phy->addr, MII_PHYSID2, &phy_id[1]);
+ if (ret)
+ return ret;
+
+ phy->id[0] = phy_id[0];
+ phy->id[1] = phy_id[1];
+ } else {
+ emac_phy_mdio_autopoll_disable(adpt);
+ }
+
+ return 0;
+}
+
+static int emac_phy_link_setup_external(struct emac_adapter *adpt,
+ enum emac_flow_ctrl req_fc_mode,
+ u32 speed, bool autoneg, bool fc)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u16 adv, bmcr, ctrl1000 = 0;
+ int ret = 0;
+
+ if (autoneg) {
+ switch (req_fc_mode) {
+ case EMAC_FC_FULL:
+ case EMAC_FC_RX_PAUSE:
+ adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
+ break;
+ case EMAC_FC_TX_PAUSE:
+ adv = ADVERTISE_PAUSE_ASYM;
+ break;
+ default:
+ adv = 0;
+ break;
+ }
+ if (!fc)
+ adv &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
+
+ if (speed & EMAC_LINK_SPEED_10_HALF)
+ adv |= ADVERTISE_10HALF;
+
+ if (speed & EMAC_LINK_SPEED_10_FULL)
+ adv |= ADVERTISE_10HALF | ADVERTISE_10FULL;
+
+ if (speed & EMAC_LINK_SPEED_100_HALF)
+ adv |= ADVERTISE_100HALF;
+
+ if (speed & EMAC_LINK_SPEED_100_FULL)
+ adv |= ADVERTISE_100HALF | ADVERTISE_100FULL;
+
+ if (speed & EMAC_LINK_SPEED_1GB_FULL)
+ ctrl1000 |= ADVERTISE_1000FULL;
+
+ ret |= emac_phy_write(adpt, phy->addr, MII_ADVERTISE, adv);
+ ret |= emac_phy_write(adpt, phy->addr, MII_CTRL1000, ctrl1000);
+
+ bmcr = BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART;
+ ret |= emac_phy_write(adpt, phy->addr, MII_BMCR, bmcr);
+ } else {
+ bmcr = BMCR_RESET;
+ switch (speed) {
+ case EMAC_LINK_SPEED_10_HALF:
+ bmcr |= BMCR_SPEED10;
+ break;
+ case EMAC_LINK_SPEED_10_FULL:
+ bmcr |= BMCR_SPEED10 | BMCR_FULLDPLX;
+ break;
+ case EMAC_LINK_SPEED_100_HALF:
+ bmcr |= BMCR_SPEED100;
+ break;
+ case EMAC_LINK_SPEED_100_FULL:
+ bmcr |= BMCR_SPEED100 | BMCR_FULLDPLX;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret |= emac_phy_write(adpt, phy->addr, MII_BMCR, bmcr);
+ }
+
+ return ret;
+}
+
+int emac_phy_link_setup(struct emac_adapter *adpt, u32 speed, bool autoneg,
+ bool fc)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int ret = 0;
+
+ if (!phy->external)
+ return emac_sgmii_no_ephy_link_setup(adpt, speed, autoneg);
+
+ if (emac_phy_link_setup_external(adpt, phy->req_fc_mode, speed, autoneg,
+ fc)) {
+ netdev_err(adpt->netdev,
+ "error: on ephy setup speed:%d autoneg:%d fc:%d\n",
+ speed, autoneg, fc);
+ ret = -EINVAL;
+ } else {
+ phy->autoneg = autoneg;
+ }
+
+ return ret;
+}
+
+int emac_phy_link_check(struct emac_adapter *adpt, u32 *speed, bool *link_up)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u16 bmsr, pssr;
+ int ret;
+
+ if (!phy->external) {
+ emac_sgmii_no_ephy_link_check(adpt, speed, link_up);
+ return 0;
+ }
+
+ ret = emac_phy_read(adpt, phy->addr, MII_BMSR, &bmsr);
+ if (ret)
+ return ret;
+
+ if (!(bmsr & BMSR_LSTATUS)) {
+ *link_up = false;
+ *speed = EMAC_LINK_SPEED_UNKNOWN;
+ return 0;
+ }
+ *link_up = true;
+ ret = emac_phy_read(adpt, phy->addr, MII_PSSR, &pssr);
+ if (ret)
+ return ret;
+
+ if (!(pssr & PSSR_SPD_DPLX_RESOLVED)) {
+ netdev_err(adpt->netdev, "error: speed duplex resolved\n");
+ return -EINVAL;
+ }
+
+ switch (pssr & PSSR_SPEED) {
+ case PSSR_1000MBS:
+ if (pssr & PSSR_DPLX)
+ *speed = EMAC_LINK_SPEED_1GB_FULL;
+ else
+ netdev_err(adpt->netdev,
+ "error: 1000M half duplex is invalid");
+ break;
+ case PSSR_100MBS:
+ if (pssr & PSSR_DPLX)
+ *speed = EMAC_LINK_SPEED_100_FULL;
+ else
+ *speed = EMAC_LINK_SPEED_100_HALF;
+ break;
+ case PSSR_10MBS:
+ if (pssr & PSSR_DPLX)
+ *speed = EMAC_LINK_SPEED_10_FULL;
+ else
+ *speed = EMAC_LINK_SPEED_10_HALF;
+ break;
+ default:
+ *speed = EMAC_LINK_SPEED_UNKNOWN;
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+/* Read speed off the LPA (Link Partner Ability) register */
+void emac_phy_link_speed_get(struct emac_adapter *adpt, u32 *speed)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int ret;
+ u16 lpa, stat1000;
+ bool link;
+
+ if (!phy->external) {
+ emac_sgmii_no_ephy_link_check(adpt, speed, &link);
+ return;
+ }
+
+ ret = emac_phy_read(adpt, phy->addr, MII_LPA, &lpa);
+ ret |= emac_phy_read(adpt, phy->addr, MII_STAT1000, &stat1000);
+ if (ret)
+ return;
+
+ *speed = EMAC_LINK_SPEED_10_HALF;
+ if (lpa & LPA_10FULL)
+ *speed = EMAC_LINK_SPEED_10_FULL;
+ else if (lpa & LPA_10HALF)
+ *speed = EMAC_LINK_SPEED_10_HALF;
+ else if (lpa & LPA_100FULL)
+ *speed = EMAC_LINK_SPEED_100_FULL;
+ else if (lpa & LPA_100HALF)
+ *speed = EMAC_LINK_SPEED_100_HALF;
+ else if (stat1000 & LPA_1000FULL)
+ *speed = EMAC_LINK_SPEED_1GB_FULL;
+}
+
+/* Read phy configuration and initialize it */
+int emac_phy_config(struct platform_device *pdev, struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ struct device_node *dt = pdev->dev.of_node;
+ int ret;
+
+ phy->external = !of_property_read_bool(dt, "qcom,no-external-phy");
+
+ /* get phy address on MDIO bus */
+ if (phy->external) {
+ ret = of_property_read_u32(dt, "phy-addr", &phy->addr);
+ if (ret)
+ return ret;
+ } else {
+ phy->uses_gpios = false;
+ }
+
+ ret = emac_sgmii_config(pdev, adpt);
+ if (ret)
+ return ret;
+
+ mutex_init(&phy->lock);
+
+ phy->autoneg = true;
+ phy->autoneg_advertised = EMAC_LINK_SPEED_DEFAULT;
+
+ return emac_sgmii_init(adpt);
+}
+
+int emac_phy_up(struct emac_adapter *adpt)
+{
+ return emac_sgmii_up(adpt);
+}
+
+void emac_phy_down(struct emac_adapter *adpt)
+{
+ emac_sgmii_down(adpt);
+}
+
+void emac_phy_reset(struct emac_adapter *adpt)
+{
+ emac_sgmii_reset(adpt);
+}
+
+void emac_phy_periodic_check(struct emac_adapter *adpt)
+{
+ emac_sgmii_periodic_check(adpt);
+}
Do you really need these wrapper functions? Why not just call the emac_
functions directly?
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-phy.h b/drivers/net/ethernet/qualcomm/emac/emac-phy.h
new file mode 100644
index 0000000..ef16471
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-phy.h
@@ -0,0 +1,73 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 2 and
+* only version 2 as published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*/
+
+#ifndef _EMAC_PHY_H_
+#define _EMAC_PHY_H_
+
+enum emac_flow_ctrl {
+ EMAC_FC_NONE,
+ EMAC_FC_RX_PAUSE,
+ EMAC_FC_TX_PAUSE,
+ EMAC_FC_FULL,
+ EMAC_FC_DEFAULT
+};
+
+/* emac_phy
+ * @base register file base address space.
+ * @irq phy interrupt number.
+ * @external true when external phy is used.
+ * @addr mii address.
+ * @id vendor id.
+ * @cur_fc_mode flow control mode in effect.
+ * @req_fc_mode flow control mode requested by caller.
+ * @disable_fc_autoneg Do not auto-negotiate flow control.
+ */
+struct emac_phy {
+ void __iomem *base;
+ int irq;
+
+ bool external;
+ bool uses_gpios;
+ u32 addr;
+ u16 id[2];
+ bool autoneg;
+ u32 autoneg_advertised;
+ u32 link_speed;
+ bool link_up;
+ /* lock - synchronize access to mdio bus */
+ struct mutex lock;
+
+ /* flow control configuration */
+ enum emac_flow_ctrl cur_fc_mode;
+ enum emac_flow_ctrl req_fc_mode;
+ bool disable_fc_autoneg;
+};
+
+struct emac_adapter;
+struct platform_device;
+
+int emac_phy_read(struct emac_adapter *adpt, u16 phy_addr, u16 reg_addr,
+ u16 *phy_data);
+int emac_phy_write(struct emac_adapter *adpt, u16 phy_addr, u16 reg_addr,
+ u16 phy_data);
+int emac_phy_config(struct platform_device *pdev, struct emac_adapter *adpt);
+int emac_phy_up(struct emac_adapter *adpt);
+void emac_phy_down(struct emac_adapter *adpt);
+void emac_phy_reset(struct emac_adapter *adpt);
+void emac_phy_periodic_check(struct emac_adapter *adpt);
+int emac_phy_external_init(struct emac_adapter *adpt);
+int emac_phy_link_setup(struct emac_adapter *adpt, u32 speed, bool autoneg,
+ bool fc);
+int emac_phy_link_check(struct emac_adapter *adpt, u32 *speed, bool *link_up);
+void emac_phy_link_speed_get(struct emac_adapter *adpt, u32 *speed);
+
+#endif /* _EMAC_PHY_H_ */
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
new file mode 100644
index 0000000..7348e21
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
@@ -0,0 +1,696 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Qualcomm Technologies, Inc. EMAC SGMII Controller driver.
+ */
+
+#include "emac.h"
+#include "emac-mac.h"
+#include "emac-sgmii.h"
+
+/* EMAC_QSERDES register offsets */
+#define EMAC_QSERDES_COM_SYS_CLK_CTRL 0x000000
+#define EMAC_QSERDES_COM_PLL_CNTRL 0x000014
+#define EMAC_QSERDES_COM_PLL_IP_SETI 0x000018
+#define EMAC_QSERDES_COM_PLL_CP_SETI 0x000024
+#define EMAC_QSERDES_COM_PLL_IP_SETP 0x000028
+#define EMAC_QSERDES_COM_PLL_CP_SETP 0x00002c
+#define EMAC_QSERDES_COM_SYSCLK_EN_SEL 0x000038
+#define EMAC_QSERDES_COM_RESETSM_CNTRL 0x000040
+#define EMAC_QSERDES_COM_PLLLOCK_CMP1 0x000044
+#define EMAC_QSERDES_COM_PLLLOCK_CMP2 0x000048
+#define EMAC_QSERDES_COM_PLLLOCK_CMP3 0x00004c
+#define EMAC_QSERDES_COM_PLLLOCK_CMP_EN 0x000050
+#define EMAC_QSERDES_COM_DEC_START1 0x000064
+#define EMAC_QSERDES_COM_DIV_FRAC_START1 0x000098
+#define EMAC_QSERDES_COM_DIV_FRAC_START2 0x00009c
+#define EMAC_QSERDES_COM_DIV_FRAC_START3 0x0000a0
+#define EMAC_QSERDES_COM_DEC_START2 0x0000a4
+#define EMAC_QSERDES_COM_PLL_CRCTRL 0x0000ac
+#define EMAC_QSERDES_COM_RESET_SM 0x0000bc
+#define EMAC_QSERDES_TX_BIST_MODE_LANENO 0x000100
+#define EMAC_QSERDES_TX_TX_EMP_POST1_LVL 0x000108
+#define EMAC_QSERDES_TX_TX_DRV_LVL 0x00010c
+#define EMAC_QSERDES_TX_LANE_MODE 0x000150
+#define EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN 0x000170
+#define EMAC_QSERDES_RX_CDR_CONTROL 0x000200
+#define EMAC_QSERDES_RX_CDR_CONTROL2 0x000210
+#define EMAC_QSERDES_RX_RX_EQ_GAIN12 0x000230
+
+/* EMAC_SGMII register offsets */
+#define EMAC_SGMII_PHY_SERDES_START 0x000300
+#define EMAC_SGMII_PHY_CMN_PWR_CTRL 0x000304
+#define EMAC_SGMII_PHY_RX_PWR_CTRL 0x000308
+#define EMAC_SGMII_PHY_TX_PWR_CTRL 0x00030C
+#define EMAC_SGMII_PHY_LANE_CTRL1 0x000318
+#define EMAC_SGMII_PHY_AUTONEG_CFG2 0x000348
+#define EMAC_SGMII_PHY_CDR_CTRL0 0x000358
+#define EMAC_SGMII_PHY_SPEED_CFG1 0x000374
+#define EMAC_SGMII_PHY_POW_DWN_CTRL0 0x000380
+#define EMAC_SGMII_PHY_RESET_CTRL 0x0003a8
+#define EMAC_SGMII_PHY_IRQ_CMD 0x0003ac
+#define EMAC_SGMII_PHY_INTERRUPT_CLEAR 0x0003b0
+#define EMAC_SGMII_PHY_INTERRUPT_MASK 0x0003b4
+#define EMAC_SGMII_PHY_INTERRUPT_STATUS 0x0003b8
+#define EMAC_SGMII_PHY_RX_CHK_STATUS 0x0003d4
+#define EMAC_SGMII_PHY_AUTONEG0_STATUS 0x0003e0
+#define EMAC_SGMII_PHY_AUTONEG1_STATUS 0x0003e4
+
+#define SGMII_CDR_MAX_CNT 0x0f
+
+#define QSERDES_PLL_IPSETI 0x01
+#define QSERDES_PLL_CP_SETI 0x3b
+#define QSERDES_PLL_IP_SETP 0x0a
+#define QSERDES_PLL_CP_SETP 0x09
+#define QSERDES_PLL_CRCTRL 0xfb
+#define QSERDES_PLL_DEC 0x02
+#define QSERDES_PLL_DIV_FRAC_START1 0x55
+#define QSERDES_PLL_DIV_FRAC_START2 0x2a
+#define QSERDES_PLL_DIV_FRAC_START3 0x03
+#define QSERDES_PLL_LOCK_CMP1 0x2b
+#define QSERDES_PLL_LOCK_CMP2 0x68
+#define QSERDES_PLL_LOCK_CMP3 0x00
+
+#define QSERDES_RX_CDR_CTRL1_THRESH 0x03
+#define QSERDES_RX_CDR_CTRL1_GAIN 0x02
+#define QSERDES_RX_CDR_CTRL2_THRESH 0x03
+#define QSERDES_RX_CDR_CTRL2_GAIN 0x04
+#define QSERDES_RX_EQ_GAIN2 0x0f
+#define QSERDES_RX_EQ_GAIN1 0x0f
+
+#define QSERDES_TX_BIST_MODE_LANENO 0x00
+#define QSERDES_TX_DRV_LVL 0x0f
+#define QSERDES_TX_EMP_POST1_LVL 0x01
+#define QSERDES_TX_LANE_MODE 0x08
+
+/* EMAC_QSERDES_COM_SYS_CLK_CTRL */
+#define SYSCLK_CM 0x10
+#define SYSCLK_AC_COUPLE 0x08
+
+/* EMAC_QSERDES_COM_PLL_CNTRL */
+#define OCP_EN 0x20
+#define PLL_DIV_FFEN 0x04
+#define PLL_DIV_ORD 0x02
+
+/* EMAC_QSERDES_COM_SYSCLK_EN_SEL */
+#define SYSCLK_SEL_CMOS 0x8
+
+/* EMAC_QSERDES_COM_RESETSM_CNTRL */
+#define FRQ_TUNE_MODE 0x10
+
+/* EMAC_QSERDES_COM_PLLLOCK_CMP_EN */
+#define PLLLOCK_CMP_EN 0x01
+
+/* EMAC_QSERDES_COM_DEC_START1 */
+#define DEC_START1_MUX 0x80
+
+/* EMAC_QSERDES_COM_DIV_FRAC_START1 */
+#define DIV_FRAC_START1_MUX 0x80
+
+/* EMAC_QSERDES_COM_DIV_FRAC_START2 */
+#define DIV_FRAC_START2_MUX 0x80
+
+/* EMAC_QSERDES_COM_DIV_FRAC_START3 */
+#define DIV_FRAC_START3_MUX 0x10
+
+/* EMAC_QSERDES_COM_DEC_START2 */
+#define DEC_START2_MUX 0x2
+#define DEC_START2 0x1
+
+/* EMAC_QSERDES_COM_RESET_SM */
+#define QSERDES_READY 0x20
+
+/* EMAC_QSERDES_TX_TX_EMP_POST1_LVL */
+#define TX_EMP_POST1_LVL_MUX 0x20
+#define TX_EMP_POST1_LVL_BMSK 0x1f
+#define TX_EMP_POST1_LVL_SHFT 0
+
+/* EMAC_QSERDES_TX_TX_DRV_LVL */
+#define TX_DRV_LVL_MUX 0x10
+#define TX_DRV_LVL_BMSK 0x0f
+#define TX_DRV_LVL_SHFT 0
+
+/* EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN */
+#define EMP_EN_MUX 0x02
+#define EMP_EN 0x01
+
+/* EMAC_QSERDES_RX_CDR_CONTROL & EMAC_QSERDES_RX_CDR_CONTROL2 */
+#define SECONDORDERENABLE 0x40
+#define FIRSTORDER_THRESH_BMSK 0x38
+#define FIRSTORDER_THRESH_SHFT 3
+#define SECONDORDERGAIN_BMSK 0x07
+#define SECONDORDERGAIN_SHFT 0
+
+/* EMAC_QSERDES_RX_RX_EQ_GAIN12 */
+#define RX_EQ_GAIN2_BMSK 0xf0
+#define RX_EQ_GAIN2_SHFT 4
+#define RX_EQ_GAIN1_BMSK 0x0f
+#define RX_EQ_GAIN1_SHFT 0
+
+/* EMAC_SGMII_PHY_SERDES_START */
+#define SERDES_START 0x01
+
+/* EMAC_SGMII_PHY_CMN_PWR_CTRL */
+#define BIAS_EN 0x40
+#define PLL_EN 0x20
+#define SYSCLK_EN 0x10
+#define CLKBUF_L_EN 0x08
+#define PLL_TXCLK_EN 0x02
+#define PLL_RXCLK_EN 0x01
+
+/* EMAC_SGMII_PHY_RX_PWR_CTRL */
+#define L0_RX_SIGDET_EN 0x80
+#define L0_RX_TERM_MODE_BMSK 0x30
+#define L0_RX_TERM_MODE_SHFT 4
+#define L0_RX_I_EN 0x02
+
+/* EMAC_SGMII_PHY_TX_PWR_CTRL */
+#define L0_TX_EN 0x20
+#define L0_CLKBUF_EN 0x10
+#define L0_TRAN_BIAS_EN 0x02
+
+/* EMAC_SGMII_PHY_LANE_CTRL1 */
+#define L0_RX_EQ_EN 0x40
+#define L0_RESET_TSYNC_EN 0x10
+#define L0_DRV_LVL_BMSK 0x0f
+#define L0_DRV_LVL_SHFT 0
+
+/* EMAC_SGMII_PHY_AUTONEG_CFG2 */
+#define FORCE_AN_TX_CFG 0x20
+#define FORCE_AN_RX_CFG 0x10
+#define AN_ENABLE 0x01
+
+/* EMAC_SGMII_PHY_SPEED_CFG1 */
+#define DUPLEX_MODE 0x10
+#define SPDMODE_1000 0x02
+#define SPDMODE_100 0x01
+#define SPDMODE_10 0x00
+#define SPDMODE_BMSK 0x03
+#define SPDMODE_SHFT 0
+
+/* EMAC_SGMII_PHY_POW_DWN_CTRL0 */
+#define PWRDN_B 0x01
+
+/* EMAC_SGMII_PHY_RESET_CTRL */
+#define PHY_SW_RESET 0x01
+
+/* EMAC_SGMII_PHY_IRQ_CMD */
+#define IRQ_GLOBAL_CLEAR 0x01
+
+/* EMAC_SGMII_PHY_INTERRUPT_MASK */
+#define DECODE_CODE_ERR 0x80
+#define DECODE_DISP_ERR 0x40
+#define PLL_UNLOCK 0x20
+#define AN_ILLEGAL_TERM 0x10
+#define SYNC_FAIL 0x08
+#define AN_START 0x04
+#define AN_END 0x02
+#define AN_REQUEST 0x01
+
+#define SGMII_PHY_IRQ_CLR_WAIT_TIME 10
+
+#define SGMII_PHY_INTERRUPT_ERR (\
+ DECODE_CODE_ERR |\
+ DECODE_DISP_ERR)
+
+#define SGMII_ISR_AN_MASK (\
+ AN_REQUEST |\
+ AN_START |\
+ AN_END |\
+ AN_ILLEGAL_TERM |\
+ PLL_UNLOCK |\
+ SYNC_FAIL)
+
+#define SGMII_ISR_MASK (\
+ SGMII_PHY_INTERRUPT_ERR |\
+ SGMII_ISR_AN_MASK)
+
+/* SGMII TX_CONFIG */
+#define TXCFG_LINK 0x8000
+#define TXCFG_MODE_BMSK 0x1c00
+#define TXCFG_1000_FULL 0x1800
+#define TXCFG_100_FULL 0x1400
+#define TXCFG_100_HALF 0x0400
+#define TXCFG_10_FULL 0x1000
+#define TXCFG_10_HALF 0x0000
+
+#define SERDES_START_WAIT_TIMES 100
+
+struct emac_reg_write {
+ ulong offset;
+#define END_MARKER 0xffffffff
+ u32 val;
+};
+
+static void emac_reg_write_all(void __iomem *base,
+ const struct emac_reg_write *itr, size_t size)
+{
+ size_t i;
+
+ for (i = 0; i < size; ++itr, ++i)
+ writel_relaxed(itr->val, base + itr->offset);
+}
+
+static const struct emac_reg_write physical_coding_sublayer_programming[] = {
+{EMAC_SGMII_PHY_CDR_CTRL0, SGMII_CDR_MAX_CNT},
+{EMAC_SGMII_PHY_POW_DWN_CTRL0, PWRDN_B},
+{EMAC_SGMII_PHY_CMN_PWR_CTRL, BIAS_EN | SYSCLK_EN | CLKBUF_L_EN |
+ PLL_TXCLK_EN | PLL_RXCLK_EN},
+{EMAC_SGMII_PHY_TX_PWR_CTRL, L0_TX_EN | L0_CLKBUF_EN | L0_TRAN_BIAS_EN},
+{EMAC_SGMII_PHY_RX_PWR_CTRL, L0_RX_SIGDET_EN | (1 << L0_RX_TERM_MODE_SHFT) |
+ L0_RX_I_EN},
+{EMAC_SGMII_PHY_CMN_PWR_CTRL, BIAS_EN | PLL_EN | SYSCLK_EN | CLKBUF_L_EN |
+ PLL_TXCLK_EN | PLL_RXCLK_EN},
+{EMAC_SGMII_PHY_LANE_CTRL1, L0_RX_EQ_EN | L0_RESET_TSYNC_EN |
+ L0_DRV_LVL_BMSK},
+};
+
+static const struct emac_reg_write sysclk_refclk_setting[] = {
+{EMAC_QSERDES_COM_SYSCLK_EN_SEL, SYSCLK_SEL_CMOS},
+{EMAC_QSERDES_COM_SYS_CLK_CTRL, SYSCLK_CM | SYSCLK_AC_COUPLE},
+};
+
+static const struct emac_reg_write pll_setting[] = {
+{EMAC_QSERDES_COM_PLL_IP_SETI, QSERDES_PLL_IPSETI},
+{EMAC_QSERDES_COM_PLL_CP_SETI, QSERDES_PLL_CP_SETI},
+{EMAC_QSERDES_COM_PLL_IP_SETP, QSERDES_PLL_IP_SETP},
+{EMAC_QSERDES_COM_PLL_CP_SETP, QSERDES_PLL_CP_SETP},
+{EMAC_QSERDES_COM_PLL_CRCTRL, QSERDES_PLL_CRCTRL},
+{EMAC_QSERDES_COM_PLL_CNTRL, OCP_EN | PLL_DIV_FFEN | PLL_DIV_ORD},
+{EMAC_QSERDES_COM_DEC_START1, DEC_START1_MUX | QSERDES_PLL_DEC},
+{EMAC_QSERDES_COM_DEC_START2, DEC_START2_MUX | DEC_START2},
+{EMAC_QSERDES_COM_DIV_FRAC_START1, DIV_FRAC_START1_MUX |
+ QSERDES_PLL_DIV_FRAC_START1},
+{EMAC_QSERDES_COM_DIV_FRAC_START2, DIV_FRAC_START2_MUX |
+ QSERDES_PLL_DIV_FRAC_START2},
+{EMAC_QSERDES_COM_DIV_FRAC_START3, DIV_FRAC_START3_MUX |
+ QSERDES_PLL_DIV_FRAC_START3},
+{EMAC_QSERDES_COM_PLLLOCK_CMP1, QSERDES_PLL_LOCK_CMP1},
+{EMAC_QSERDES_COM_PLLLOCK_CMP2, QSERDES_PLL_LOCK_CMP2},
+{EMAC_QSERDES_COM_PLLLOCK_CMP3, QSERDES_PLL_LOCK_CMP3},
+{EMAC_QSERDES_COM_PLLLOCK_CMP_EN, PLLLOCK_CMP_EN},
+{EMAC_QSERDES_COM_RESETSM_CNTRL, FRQ_TUNE_MODE},
+};
+
+static const struct emac_reg_write cdr_setting[] = {
+{EMAC_QSERDES_RX_CDR_CONTROL, SECONDORDERENABLE |
+ (QSERDES_RX_CDR_CTRL1_THRESH << FIRSTORDER_THRESH_SHFT) |
+ (QSERDES_RX_CDR_CTRL1_GAIN << SECONDORDERGAIN_SHFT)},
+{EMAC_QSERDES_RX_CDR_CONTROL2, SECONDORDERENABLE |
+ (QSERDES_RX_CDR_CTRL2_THRESH << FIRSTORDER_THRESH_SHFT) |
+ (QSERDES_RX_CDR_CTRL2_GAIN << SECONDORDERGAIN_SHFT)},
+};
+
+static const struct emac_reg_write tx_rx_setting[] = {
+{EMAC_QSERDES_TX_BIST_MODE_LANENO, QSERDES_TX_BIST_MODE_LANENO},
+{EMAC_QSERDES_TX_TX_DRV_LVL, TX_DRV_LVL_MUX |
+ (QSERDES_TX_DRV_LVL << TX_DRV_LVL_SHFT)},
+{EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN, EMP_EN_MUX | EMP_EN},
+{EMAC_QSERDES_TX_TX_EMP_POST1_LVL, TX_EMP_POST1_LVL_MUX |
+ (QSERDES_TX_EMP_POST1_LVL << TX_EMP_POST1_LVL_SHFT)},
+{EMAC_QSERDES_RX_RX_EQ_GAIN12,
+ (QSERDES_RX_EQ_GAIN2 << RX_EQ_GAIN2_SHFT) |
+ (QSERDES_RX_EQ_GAIN1 << RX_EQ_GAIN1_SHFT)},
+{EMAC_QSERDES_TX_LANE_MODE, QSERDES_TX_LANE_MODE},
+};
+
+int emac_sgmii_link_init(struct emac_adapter *adpt, u32 speed, bool autoneg,
+ bool fc)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 val;
+ u32 speed_cfg = 0;
+
+ val = readl_relaxed(phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
+
+ if (autoneg) {
+ val &= ~(FORCE_AN_RX_CFG | FORCE_AN_TX_CFG);
+ val |= AN_ENABLE;
+ writel_relaxed(val, phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
+ } else {
+ switch (speed) {
+ case EMAC_LINK_SPEED_10_HALF:
+ speed_cfg = SPDMODE_10;
+ break;
+ case EMAC_LINK_SPEED_10_FULL:
+ speed_cfg = SPDMODE_10 | DUPLEX_MODE;
+ break;
+ case EMAC_LINK_SPEED_100_HALF:
+ speed_cfg = SPDMODE_100;
+ break;
+ case EMAC_LINK_SPEED_100_FULL:
+ speed_cfg = SPDMODE_100 | DUPLEX_MODE;
+ break;
+ case EMAC_LINK_SPEED_1GB_FULL:
+ speed_cfg = SPDMODE_1000 | DUPLEX_MODE;
+ break;
+ default:
+ return -EINVAL;
+ }
+ val &= ~AN_ENABLE;
+ writel_relaxed(speed_cfg,
+ phy->base + EMAC_SGMII_PHY_SPEED_CFG1);
+ writel_relaxed(val, phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
+ }
+ /* Ensure Auto-Neg setting are written to HW before leaving */
+ wmb();
+
+ return 0;
+}
+
+int emac_sgmii_irq_clear(struct emac_adapter *adpt, u32 irq_bits)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 status;
+ int i;
+
+ writel_relaxed(irq_bits, phy->base + EMAC_SGMII_PHY_INTERRUPT_CLEAR);
+ writel_relaxed(IRQ_GLOBAL_CLEAR, phy->base + EMAC_SGMII_PHY_IRQ_CMD);
+ /* Ensure interrupt clear command is written to HW */
+ wmb();
+
+ /* After set the IRQ_GLOBAL_CLEAR bit, the status clearing must
+ * be confirmed before clearing the bits in other registers.
+ * It takes a few cycles for hw to clear the interrupt status.
+ */
+ for (i = 0; i < SGMII_PHY_IRQ_CLR_WAIT_TIME; i++) {
+ udelay(1);
+ status = readl_relaxed(phy->base +
+ EMAC_SGMII_PHY_INTERRUPT_STATUS);
+ if (!(status & irq_bits))
+ break;
+ }
Please use readl_poll_timeout() instead.
+ if (status & irq_bits) {
+ netdev_err(adpt->netdev,
+ "error: failed clear SGMII irq: status:0x%x bits:0x%x\n",
+ status, irq_bits);
+ return -EIO;
+ }
+
+ /* Finalize clearing procedure */
+ writel_relaxed(0, phy->base + EMAC_SGMII_PHY_IRQ_CMD);
+ writel_relaxed(0, phy->base + EMAC_SGMII_PHY_INTERRUPT_CLEAR);
+ /* Ensure that clearing procedure finalization is written to HW */
+ wmb();
+
+ return 0;
+}
+
+int emac_sgmii_init(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int i;
+ int ret;
+
+ ret = emac_sgmii_link_init(adpt, phy->autoneg_advertised, phy->autoneg,
+ !phy->disable_fc_autoneg);
+ if (ret)
+ return ret;
+
+ emac_reg_write_all(phy->base, physical_coding_sublayer_programming,
+ ARRAY_SIZE(physical_coding_sublayer_programming));
+
+ /* Ensure Rx/Tx lanes power configuration is written to hw before
+ * configuring the SerDes engine's clocks
+ */
+ wmb();
+
+ emac_reg_write_all(phy->base, sysclk_refclk_setting,
+ ARRAY_SIZE(sysclk_refclk_setting));
+ emac_reg_write_all(phy->base, pll_setting, ARRAY_SIZE(pll_setting));
+ emac_reg_write_all(phy->base, cdr_setting, ARRAY_SIZE(cdr_setting));
+ emac_reg_write_all(phy->base, tx_rx_setting,
+ ARRAY_SIZE(tx_rx_setting));
+
+ /* Ensure SerDes engine configuration is written to hw before powering
+ * it up
+ */
+ wmb();
+
+ writel_relaxed(SERDES_START, phy->base + EMAC_SGMII_PHY_SERDES_START);
+
+ /* Ensure Rx/Tx SerDes engine power-up command is written to HW */
+ wmb();
+
+ for (i = 0; i < SERDES_START_WAIT_TIMES; i++) {
+ if (readl_relaxed(phy->base + EMAC_QSERDES_COM_RESET_SM) &
+ QSERDES_READY)
+ break;
+ usleep_range(100, 200);
+ }
Please use readl_poll_timeout() instead.
+
+ if (i == SERDES_START_WAIT_TIMES) {
+ netdev_err(adpt->netdev, "error: ser/des failed to start\n");
+ return -EIO;
+ }
+ /* Mask out all the SGMII Interrupt */
+ writel_relaxed(0, phy->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+ /* Ensure SGMII interrupts are masked out before clearing them */
+ wmb();
+
+ emac_sgmii_irq_clear(adpt, SGMII_PHY_INTERRUPT_ERR);
+
+ return 0;
+}
+
+void emac_sgmii_reset_prepare(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 val;
+
+ val = readl_relaxed(phy->base + EMAC_EMAC_WRAPPER_CSR2);
+ writel_relaxed(((val & ~PHY_RESET) | PHY_RESET),
+ phy->base + EMAC_EMAC_WRAPPER_CSR2);
+ /* Ensure phy-reset command is written to HW before the release cmd */
+ wmb();
+ msleep(50);
+ val = readl_relaxed(phy->base + EMAC_EMAC_WRAPPER_CSR2);
+ writel_relaxed((val & ~PHY_RESET),
+ phy->base + EMAC_EMAC_WRAPPER_CSR2);
+ /* Ensure phy-reset release command is written to HW before initializing
+ * SGMII
+ */
+ wmb();
+ msleep(50);
+}
+
+void emac_sgmii_reset(struct emac_adapter *adpt)
+{
+ clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], EMC_CLK_RATE_19_2MHZ);
+ emac_sgmii_reset_prepare(adpt);
+ emac_sgmii_init(adpt);
+ clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], EMC_CLK_RATE_125MHZ);
+}
+
+int emac_sgmii_no_ephy_link_setup(struct emac_adapter *adpt, u32 speed,
+ bool autoneg)
+{
+ struct emac_phy *phy = &adpt->phy;
+
+ phy->autoneg = autoneg;
+ phy->autoneg_advertised = speed;
+ /* The AN_ENABLE and SPEED_CFG can't change on fly. The SGMII_PHY has
+ * to be re-initialized.
+ */
+ emac_sgmii_reset_prepare(adpt);
+ return emac_sgmii_init(adpt);
In general, there should be a blank line above "return" statements.
Please fix everywhere.
+}
+
+int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ struct resource *res;
+ int ret;
+
+ ret = platform_get_irq_byname(pdev, "sgmii_irq");
+ if (ret < 0)
+ return ret;
+
+ phy->irq = ret;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sgmii");
+ if (!res) {
+ netdev_err(adpt->netdev, "error: missing 'sgmii' resource\n");
+ return -ENXIO;
+ }
+
+ phy->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(phy->base))
+ return -ENOMEM;
+
+ return 0;
+}
+
+void emac_sgmii_autoneg_check(struct emac_adapter *adpt, u32 *speed,
+ bool *link_up)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 autoneg0, autoneg1, status;
+
+ autoneg0 = readl_relaxed(phy->base + EMAC_SGMII_PHY_AUTONEG0_STATUS);
+ autoneg1 = readl_relaxed(phy->base + EMAC_SGMII_PHY_AUTONEG1_STATUS);
+ status = ((autoneg1 & 0xff) << 8) | (autoneg0 & 0xff);
+
+ if (!(status & TXCFG_LINK)) {
+ *link_up = false;
+ *speed = EMAC_LINK_SPEED_UNKNOWN;
+ return;
+ }
+
+ *link_up = true;
+
+ switch (status & TXCFG_MODE_BMSK) {
+ case TXCFG_1000_FULL:
+ *speed = EMAC_LINK_SPEED_1GB_FULL;
+ break;
+ case TXCFG_100_FULL:
+ *speed = EMAC_LINK_SPEED_100_FULL;
+ break;
+ case TXCFG_100_HALF:
+ *speed = EMAC_LINK_SPEED_100_HALF;
+ break;
+ case TXCFG_10_FULL:
+ *speed = EMAC_LINK_SPEED_10_FULL;
+ break;
+ case TXCFG_10_HALF:
+ *speed = EMAC_LINK_SPEED_10_HALF;
+ break;
+ default:
+ *speed = EMAC_LINK_SPEED_UNKNOWN;
+ break;
+ }
+}
+
+void emac_sgmii_no_ephy_link_check(struct emac_adapter *adpt, u32 *speed,
+ bool *link_up)
+{
+ struct emac_phy *phy = &adpt->phy;
+ u32 val;
+
+ val = readl_relaxed(phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
+ if (val & AN_ENABLE) {
+ emac_sgmii_autoneg_check(adpt, speed, link_up);
+ return;
+ }
+
+ val = readl_relaxed(phy->base + EMAC_SGMII_PHY_SPEED_CFG1);
+ val &= DUPLEX_MODE | SPDMODE_BMSK;
+ switch (val) {
switch (val & (DUPLEX_MODE | SPDMODE_BMSK)) {
is cleaner
+ case DUPLEX_MODE | SPDMODE_1000:
+ *speed = EMAC_LINK_SPEED_1GB_FULL;
+ break;
+ case DUPLEX_MODE | SPDMODE_100:
+ *speed = EMAC_LINK_SPEED_100_FULL;
+ break;
+ case SPDMODE_100:
+ *speed = EMAC_LINK_SPEED_100_HALF;
+ break;
+ case DUPLEX_MODE | SPDMODE_10:
+ *speed = EMAC_LINK_SPEED_10_FULL;
+ break;
+ case SPDMODE_10:
+ *speed = EMAC_LINK_SPEED_10_HALF;
+ break;
+ default:
+ *speed = EMAC_LINK_SPEED_UNKNOWN;
+ break;
+ }
+ *link_up = true;
+}
+
+irqreturn_t emac_sgmii_isr(int _irq, void *data)
+{
+ struct emac_adapter *adpt = data;
+ struct emac_phy *phy = &adpt->phy;
+ u32 status;
+
+ netif_dbg(adpt, intr, adpt->netdev, "receive sgmii interrupt\n");
+
+ do {
+ status = readl_relaxed(phy->base +
+ EMAC_SGMII_PHY_INTERRUPT_STATUS) &
+ SGMII_ISR_MASK;
+ if (!status)
+ break;
+
+ if (status & SGMII_PHY_INTERRUPT_ERR) {
+ set_bit(EMAC_STATUS_TASK_CHK_SGMII_REQ, &adpt->status);
+ if (!test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ emac_work_thread_reschedule(adpt);
+ }
+
+ if (status & SGMII_ISR_AN_MASK)
+ emac_lsc_schedule_check(adpt);
+
+ if (emac_sgmii_irq_clear(adpt, status) != 0) {
+ /* reset */
+ set_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status);
+ emac_work_thread_reschedule(adpt);
+ break;
+ }
+ } while (1);
+
+ return IRQ_HANDLED;
+}
+
+int emac_sgmii_up(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int ret;
+
+ ret = request_irq(phy->irq, emac_sgmii_isr, IRQF_TRIGGER_RISING,
+ "sgmii_irq", adpt);
+ if (ret)
+ netdev_err(adpt->netdev,
+ "error:%d on request_irq(%d:sgmii_irq)\n", ret,
+ phy->irq);
+
+ /* enable sgmii irq */
+ writel_relaxed(SGMII_ISR_MASK,
+ phy->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+
+ return ret;
+}
+
+void emac_sgmii_down(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+
+ writel_relaxed(0, phy->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+ synchronize_irq(phy->irq);
+ free_irq(phy->irq, adpt);
+}
+
+/* Check SGMII for error */
+void emac_sgmii_periodic_check(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+
+ if (!test_bit(EMAC_STATUS_TASK_CHK_SGMII_REQ, &adpt->status))
+ return;
+ clear_bit(EMAC_STATUS_TASK_CHK_SGMII_REQ, &adpt->status);
+
+ /* ensure that no reset is in progress while link task is running */
+ while (test_and_set_bit(EMAC_STATUS_RESETTING, &adpt->status))
+ msleep(20); /* Reset might take few 10s of ms */
+
+ if (test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ goto sgmii_task_done;
+
+ if (readl_relaxed(phy->base + EMAC_SGMII_PHY_RX_CHK_STATUS) & 0x40)
+ goto sgmii_task_done;
+
+ netdev_err(adpt->netdev, "error: SGMII CDR not locked\n");
+
+sgmii_task_done:
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+}
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
new file mode 100644
index 0000000..4d55915b
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
@@ -0,0 +1,30 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _EMAC_SGMII_H_
+#define _EMAC_SGMII_H_
+
+struct emac_adapter;
+struct platform_device;
+
+int emac_sgmii_init(struct emac_adapter *adpt);
+int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt);
+void emac_sgmii_reset(struct emac_adapter *adpt);
+int emac_sgmii_up(struct emac_adapter *adpt);
+void emac_sgmii_down(struct emac_adapter *adpt);
+void emac_sgmii_periodic_check(struct emac_adapter *adpt);
+int emac_sgmii_no_ephy_link_setup(struct emac_adapter *adpt, u32 speed,
+ bool autoneg);
+void emac_sgmii_no_ephy_link_check(struct emac_adapter *adpt, u32 *speed,
+ bool *link_up);
+
+#endif /*_EMAC_SGMII_H_*/
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c
new file mode 100644
index 0000000..fcf8784
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac.c
@@ -0,0 +1,1322 @@
+/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver
+ * The EMAC driver supports following features:
+ * 1) Receive Side Scaling (RSS).
+ * 2) Checksum offload.
+ * 3) Multiple PHY support on MDIO bus.
+ * 4) Runtime power management support.
+ * 5) Interrupt coalescing support.
+ * 6) SGMII phy.
+ * 7) SGMII direct connection (without external phy).
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/of_gpio.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include "emac.h"
+#include "emac-mac.h"
+#include "emac-phy.h"
+
+#define DRV_VERSION "1.1.0.0"
+
+static int debug = -1;
+module_param(debug, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+static int emac_irq_use_extended;
+module_param(emac_irq_use_extended, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+const char emac_drv_name[] = "qcom-emac";
+const char emac_drv_description[] =
+ "Qualcomm Technologies, Inc. EMAC Ethernet Driver";
+const char emac_drv_version[] = DRV_VERSION;
+
+#define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
+ NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP | \
+ NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR | NETIF_MSG_TX_QUEUED | \
+ NETIF_MSG_INTR | NETIF_MSG_TX_DONE | NETIF_MSG_RX_STATUS | \
+ NETIF_MSG_PKTDATA | NETIF_MSG_HW | NETIF_MSG_WOL)
+
+#define EMAC_RRD_SIZE 4
+#define EMAC_TS_RRD_SIZE 6
+#define EMAC_TPD_SIZE 4
+#define EMAC_RFD_SIZE 2
+
+#define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0
+#define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22
+#define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0
+#define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24
+
+#define RXQ0_NUM_RFD_PREF_DEF 8
+#define TXQ0_NUM_TPD_PREF_DEF 5
+
+#define EMAC_PREAMBLE_DEF 7
+
+#define DMAR_DLY_CNT_DEF 15
+#define DMAW_DLY_CNT_DEF 4
+
+#define IMR_NORMAL_MASK (\
+ ISR_ERROR |\
+ ISR_GPHY_LINK |\
+ ISR_TX_PKT |\
+ GPHY_WAKEUP_INT)
+
+#define IMR_EXTENDED_MASK (\
+ SW_MAN_INT |\
+ ISR_OVER |\
+ ISR_ERROR |\
+ ISR_GPHY_LINK |\
+ ISR_TX_PKT |\
+ GPHY_WAKEUP_INT)
+
+#define ISR_TX_PKT (\
+ TX_PKT_INT |\
+ TX_PKT_INT1 |\
+ TX_PKT_INT2 |\
+ TX_PKT_INT3)
+
+#define ISR_GPHY_LINK (\
+ GPHY_LINK_UP_INT |\
+ GPHY_LINK_DOWN_INT)
+
+#define ISR_OVER (\
+ RFD0_UR_INT |\
+ RFD1_UR_INT |\
+ RFD2_UR_INT |\
+ RFD3_UR_INT |\
+ RFD4_UR_INT |\
+ RXF_OF_INT |\
+ TXF_UR_INT)
+
+#define ISR_ERROR (\
+ DMAR_TO_INT |\
+ DMAW_TO_INT |\
+ TXQ_TO_INT)
+
+static irqreturn_t emac_isr(int irq, void *data);
+static irqreturn_t emac_wol_isr(int irq, void *data);
+
+/* RSS SW woraround:
+ * EMAC HW has an issue with interrupt assignment because of which receive queue
+ * 1 is disabled and following receive rss queue to interrupt mapping is used:
+ * rss-queue intr
+ * 0 core0
+ * 1 core3 (disabled)
+ * 2 core1
+ * 3 core2
+ */
+const struct emac_irq_config emac_irq_cfg_tbl[EMAC_IRQ_CNT] = {
+{ "core0_irq", emac_isr, EMAC_INT_STATUS, EMAC_INT_MASK, RX_PKT_INT0, 0},
+{ "core3_irq", emac_isr, EMAC_INT3_STATUS, EMAC_INT3_MASK, 0, 0},
+{ "core1_irq", emac_isr, EMAC_INT1_STATUS, EMAC_INT1_MASK, RX_PKT_INT2, 0},
+{ "core2_irq", emac_isr, EMAC_INT2_STATUS, EMAC_INT2_MASK, RX_PKT_INT3, 0},
+{ "wol_irq", emac_wol_isr, 0, 0, 0, 0},
+};
+
+const char * const emac_gpio_name[] = {
+ "qcom,emac-gpio-mdc", "qcom,emac-gpio-mdio"
+};
+
+/* in sync with enum emac_clk_id */
+static const char * const emac_clk_name[] = {
+ "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk",
+ "rx_clk", "sys_clk"
+};
+
+void emac_reg_update32(void __iomem *addr, u32 mask, u32 val)
+{
+ u32 data = readl_relaxed(addr);
+
+ writel_relaxed(((data & ~mask) | val), addr);
+}
+
+/* reinitialize */
+void emac_reinit_locked(struct emac_adapter *adpt)
+{
+ WARN_ON(in_interrupt());
+
+ while (test_and_set_bit(EMAC_STATUS_RESETTING, &adpt->status))
+ msleep(20); /* Reset might take few 10s of ms */
+
+ if (test_bit(EMAC_STATUS_DOWN, &adpt->status)) {
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+ return;
+ }
+
+ emac_mac_down(adpt, true);
+
+ emac_phy_reset(adpt);
+ emac_mac_up(adpt);
+
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+}
+
+void emac_work_thread_reschedule(struct emac_adapter *adpt)
+{
+ if (!test_bit(EMAC_STATUS_DOWN, &adpt->status) &&
+ !test_bit(EMAC_STATUS_WATCH_DOG, &adpt->status)) {
+ set_bit(EMAC_STATUS_WATCH_DOG, &adpt->status);
+ schedule_work(&adpt->work_thread);
+ }
+}
+
+void emac_lsc_schedule_check(struct emac_adapter *adpt)
+{
+ set_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status);
+ adpt->link_chk_timeout = jiffies + EMAC_TRY_LINK_TIMEOUT;
+
+ if (!test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ emac_work_thread_reschedule(adpt);
+}
+
+/* Change MAC address */
+static int emac_set_mac_address(struct net_device *netdev, void *p)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ struct sockaddr *addr = p;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (netif_running(netdev))
+ return -EBUSY;
+
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+ memcpy(adpt->mac_addr, addr->sa_data, netdev->addr_len);
+
+ emac_mac_addr_clear(adpt, adpt->mac_addr);
+ return 0;
+}
+
+/* NAPI */
+static int emac_napi_rtx(struct napi_struct *napi, int budget)
+{
+ struct emac_rx_queue *rx_q = container_of(napi, struct emac_rx_queue,
+ napi);
+ struct emac_adapter *adpt = netdev_priv(rx_q->netdev);
+ struct emac_irq *irq = rx_q->irq;
+
+ int work_done = 0;
+
+ /* Keep link state information with original netdev */
+ if (!netif_carrier_ok(adpt->netdev))
+ goto quit_polling;
+
+ emac_mac_rx_process(adpt, rx_q, &work_done, budget);
+
+ if (work_done < budget) {
+quit_polling:
+ napi_complete(napi);
+
+ irq->mask |= rx_q->intr;
+ writel_relaxed(irq->mask, adpt->base +
+ emac_irq_cfg_tbl[irq->idx].mask_reg);
+ wmb(); /* ensure that interrupt enable is flushed to HW */
+ }
+
+ return work_done;
+}
+
+/* Transmit the packet */
+static int emac_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_tx_queue *tx_q = &adpt->tx_q[EMAC_ACTIVE_TXQ];
+
+ return emac_mac_tx_buf_send(adpt, tx_q, skb);
+}
+
+/* ISR */
+static irqreturn_t emac_wol_isr(int irq, void *data)
+{
+ netif_dbg(emac_irq_get_adpt(data), wol, emac_irq_get_adpt(data)->netdev,
+ "EMAC wol interrupt received\n");
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t emac_isr(int _irq, void *data)
+{
+ struct emac_irq *irq = data;
+ const struct emac_irq_config *irq_cfg = &emac_irq_cfg_tbl[irq->idx];
+ struct emac_adapter *adpt = emac_irq_get_adpt(data);
+ struct emac_rx_queue *rx_q = &adpt->rx_q[irq->idx];
+
+ int max_ints = 1;
+ u32 isr, status;
+
+ /* disable the interrupt */
+ writel_relaxed(0, adpt->base + irq_cfg->mask_reg);
+ wmb(); /* ensure that interrupt disable is flushed to HW */
+
+ do {
+ isr = readl_relaxed(adpt->base + irq_cfg->status_reg);
+ status = isr & irq->mask;
+
+ if (status == 0)
+ break;
+
+ if (status & ISR_ERROR) {
+ netif_warn(adpt, intr, adpt->netdev,
+ "warning: error irq status 0x%x\n",
+ status & ISR_ERROR);
+ /* reset MAC */
+ set_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status);
+ emac_work_thread_reschedule(adpt);
+ }
+
+ /* Schedule the napi for receive queue with interrupt
+ * status bit set
+ */
+ if ((status & rx_q->intr)) {
+ if (napi_schedule_prep(&rx_q->napi)) {
+ irq->mask &= ~rx_q->intr;
+ __napi_schedule(&rx_q->napi);
+ }
+ }
+
+ if (status & ISR_TX_PKT) {
+ if (status & TX_PKT_INT)
+ emac_mac_tx_process(adpt, &adpt->tx_q[0]);
+ if (status & TX_PKT_INT1)
+ emac_mac_tx_process(adpt, &adpt->tx_q[1]);
+ if (status & TX_PKT_INT2)
+ emac_mac_tx_process(adpt, &adpt->tx_q[2]);
+ if (status & TX_PKT_INT3)
+ emac_mac_tx_process(adpt, &adpt->tx_q[3]);
+ }
+
+ if (status & ISR_OVER)
+ netif_warn(adpt, intr, adpt->netdev,
+ "warning: TX/RX overflow status 0x%x\n",
+ status & ISR_OVER);
+
+ /* link event */
+ if (status & (ISR_GPHY_LINK | SW_MAN_INT)) {
+ emac_lsc_schedule_check(adpt);
+ break;
+ }
+ } while (--max_ints > 0);
+
+ /* enable the interrupt */
+ writel_relaxed(irq->mask, adpt->base + irq_cfg->mask_reg);
+ wmb(); /* ensure that interrupt enable is flushed to HW */
+ return IRQ_HANDLED;
+}
+
+/* Configure VLAN tag strip/insert feature */
+static int emac_set_features(struct net_device *netdev,
+ netdev_features_t features)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ netdev_features_t changed = features ^ netdev->features;
+
+ if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX)))
+ return 0;
+
+ netdev->features = features;
+ if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
+ set_bit(EMAC_STATUS_VLANSTRIP_EN, &adpt->status);
+ else
+ clear_bit(EMAC_STATUS_VLANSTRIP_EN, &adpt->status);
+
+ if (netif_running(netdev))
+ emac_reinit_locked(adpt);
+
+ return 0;
+}
+
+/* Configure Multicast and Promiscuous modes */
+void emac_rx_mode_set(struct net_device *netdev)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ struct netdev_hw_addr *ha;
+
+ /* Check for Promiscuous and All Multicast modes */
+ if (netdev->flags & IFF_PROMISC) {
+ set_bit(EMAC_STATUS_PROMISC_EN, &adpt->status);
+ } else if (netdev->flags & IFF_ALLMULTI) {
+ set_bit(EMAC_STATUS_MULTIALL_EN, &adpt->status);
+ clear_bit(EMAC_STATUS_PROMISC_EN, &adpt->status);
+ } else {
+ clear_bit(EMAC_STATUS_MULTIALL_EN, &adpt->status);
+ clear_bit(EMAC_STATUS_PROMISC_EN, &adpt->status);
+ }
+ emac_mac_mode_config(adpt);
+
+ /* update multicast address filtering */
+ emac_mac_multicast_addr_clear(adpt);
+ netdev_for_each_mc_addr(ha, netdev)
+ emac_mac_multicast_addr_set(adpt, ha->addr);
+}
+
+/* Change the Maximum Transfer Unit (MTU) */
+static int emac_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ int old_mtu = netdev->mtu;
+ int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
+
+ if ((max_frame < EMAC_MIN_ETH_FRAME_SIZE) ||
+ (max_frame > EMAC_MAX_ETH_FRAME_SIZE)) {
+ netdev_err(adpt->netdev, "error: invalid MTU setting\n");
+ return -EINVAL;
+ }
+
+ if ((old_mtu != new_mtu) && netif_running(netdev)) {
+ netif_info(adpt, hw, adpt->netdev,
+ "changing MTU from %d to %d\n", netdev->mtu,
+ new_mtu);
+ netdev->mtu = new_mtu;
+ adpt->mtu = new_mtu;
+ adpt->rxbuf_size = new_mtu > EMAC_DEF_RX_BUF_SIZE ?
+ ALIGN(max_frame, 8) : EMAC_DEF_RX_BUF_SIZE;
+ emac_reinit_locked(adpt);
+ }
+
+ return 0;
+}
+
+/* Called when the network interface is made active */
+static int emac_open(struct net_device *netdev)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ int retval;
+
+ netif_carrier_off(netdev);
+
+ /* allocate rx/tx dma buffer & descriptors */
+ retval = emac_mac_rx_tx_rings_alloc_all(adpt);
+ if (retval) {
+ netdev_err(adpt->netdev, "error allocating rx/tx rings\n");
+ goto err_alloc_rtx;
Just do "return retval" here.
+ }
+
+ pm_runtime_set_active(netdev->dev.parent);
+ pm_runtime_enable(netdev->dev.parent);
+
+ retval = emac_mac_up(adpt);
+ if (retval)
+ goto err_up;
Just do "emac_mac_rx_tx_rings_free_all(adpt);" here. You don't need any
of these gotos.
+
+ return retval;
+
+err_up:
+ emac_mac_rx_tx_rings_free_all(adpt);
+err_alloc_rtx:
+ return retval;
+}
+
+/* Called when the network interface is disabled */
+static int emac_close(struct net_device *netdev)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ /* ensure no task is running and no reset is in progress */
+ while (test_and_set_bit(EMAC_STATUS_RESETTING, &adpt->status))
+ msleep(20); /* Reset might take few 10s of ms */
+
+ pm_runtime_disable(netdev->dev.parent);
+ if (!test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ emac_mac_down(adpt, true);
+ else
+ emac_mac_reset(adpt);
+
+ emac_mac_rx_tx_rings_free_all(adpt);
+
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+ return 0;
+}
+
+/* PHY related IOCTLs */
+static int emac_mii_ioctl(struct net_device *netdev,
+ struct ifreq *ifr, int cmd)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_phy *phy = &adpt->phy;
+ struct mii_ioctl_data *data = if_mii(ifr);
+ int retval = 0;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ data->phy_id = phy->addr;
+ break;
+
+ case SIOCGMIIREG:
+ if (!capable(CAP_NET_ADMIN)) {
+ retval = -EPERM;
+ break;
+ }
+
+ if (data->reg_num & ~(0x1F)) {
+ retval = -EFAULT;
+ break;
+ }
+
+ if (data->phy_id >= PHY_MAX_ADDR) {
+ retval = -EFAULT;
+ break;
+ }
+
+ if (phy->external && data->phy_id != phy->addr) {
+ retval = -EFAULT;
+ break;
+ }
+
+ retval = emac_phy_read(adpt, data->phy_id, data->reg_num,
+ &data->val_out);
+ break;
+
+ case SIOCSMIIREG:
+ if (!capable(CAP_NET_ADMIN)) {
+ retval = -EPERM;
+ break;
+ }
+
+ if (data->reg_num & ~(0x1F)) {
+ retval = -EFAULT;
+ break;
+ }
+
+ if (data->phy_id >= PHY_MAX_ADDR) {
+ retval = -EFAULT;
+ break;
+ }
+
+ if (phy->external && data->phy_id != phy->addr) {
+ retval = -EFAULT;
+ break;
+ }
+
+ retval = emac_phy_write(adpt, data->phy_id, data->reg_num,
+ data->val_in);
+
+ break;
+ }
Instead of doing "retval == xxx; break", this function would be half the
size if you just did "return xxx" directly.
+
+ return retval;
+}
+
+/* Respond to a TX hang */
+static void emac_tx_timeout(struct net_device *netdev)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ if (!test_bit(EMAC_STATUS_DOWN, &adpt->status)) {
+ set_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status);
+ emac_work_thread_reschedule(adpt);
+ }
+}
+
+/* IOCTL support for the interface */
+static int emac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ case SIOCGMIIREG:
+ case SIOCSMIIREG:
+ return emac_mii_ioctl(netdev, ifr, cmd);
+ case SIOCSHWTSTAMP:
+ default:
The "case SIOCSHWTSTAMP" is redundant.
+ return -EOPNOTSUPP;
+ }
+}
+
+/* Provide network statistics info for the interface */
+struct rtnl_link_stats64 *emac_get_stats64(struct net_device *netdev,
+ struct rtnl_link_stats64 *net_stats)
+{
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_stats *stats = &adpt->stats;
+ u16 addr = REG_MAC_RX_STATUS_BIN;
+ u64 *stats_itr = &adpt->stats.rx_ok;
+ u32 val;
+
+ while (addr <= REG_MAC_RX_STATUS_END) {
+ val = readl_relaxed(adpt->base + addr);
+ *stats_itr += val;
+ ++stats_itr;
+ addr += sizeof(u32);
+ }
+
+ /* additional rx status */
+ val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG23);
+ adpt->stats.rx_crc_align += val;
+ val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG24);
+ adpt->stats.rx_jubbers += val;
+
+ /* update tx status */
+ addr = REG_MAC_TX_STATUS_BIN;
+ stats_itr = &adpt->stats.tx_ok;
+
+ while (addr <= REG_MAC_TX_STATUS_END) {
+ val = readl_relaxed(adpt->base + addr);
+ *stats_itr += val;
+ ++stats_itr;
+ addr += sizeof(u32);
+ }
+
+ /* additional tx status */
+ val = readl_relaxed(adpt->base + EMAC_TXMAC_STATC_REG25);
+ adpt->stats.tx_col += val;
+
+ /* return parsed statistics */
+ net_stats->rx_packets = stats->rx_ok;
+ net_stats->tx_packets = stats->tx_ok;
+ net_stats->rx_bytes = stats->rx_byte_cnt;
+ net_stats->tx_bytes = stats->tx_byte_cnt;
+ net_stats->multicast = stats->rx_mcast;
+ net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 +
+ stats->tx_late_col + stats->tx_abort_col;
+
+ net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err +
+ stats->rx_len_err + stats->rx_sz_ov +
+ stats->rx_align_err;
+ net_stats->rx_fifo_errors = stats->rx_rxf_ov;
+ net_stats->rx_length_errors = stats->rx_len_err;
+ net_stats->rx_crc_errors = stats->rx_fcs_err;
+ net_stats->rx_frame_errors = stats->rx_align_err;
+ net_stats->rx_over_errors = stats->rx_rxf_ov;
+ net_stats->rx_missed_errors = stats->rx_rxf_ov;
+
+ net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col +
+ stats->tx_underrun + stats->tx_trunc;
+ net_stats->tx_fifo_errors = stats->tx_underrun;
+ net_stats->tx_aborted_errors = stats->tx_abort_col;
+ net_stats->tx_window_errors = stats->tx_late_col;
+
+ return net_stats;
+}
+
+static const struct net_device_ops emac_netdev_ops = {
+ .ndo_open = &emac_open,
+ .ndo_stop = &emac_close,
+ .ndo_validate_addr = ð_validate_addr,
+ .ndo_start_xmit = &emac_start_xmit,
+ .ndo_set_mac_address = &emac_set_mac_address,
+ .ndo_change_mtu = &emac_change_mtu,
+ .ndo_do_ioctl = &emac_ioctl,
+ .ndo_tx_timeout = &emac_tx_timeout,
+ .ndo_get_stats64 = &emac_get_stats64,
+ .ndo_set_features = emac_set_features,
+ .ndo_set_rx_mode = emac_rx_mode_set,
+};
+
+static inline char *emac_link_speed_to_str(u32 speed)
Should should not be inline.
static const char *emac_link_speed_to_str(u32 speed)
+{
+ switch (speed) {
+ case EMAC_LINK_SPEED_1GB_FULL:
+ return "1 Gbps Duplex Full";
+ case EMAC_LINK_SPEED_100_FULL:
+ return "100 Mbps Duplex Full";
+ case EMAC_LINK_SPEED_100_HALF:
+ return "100 Mbps Duplex Half";
+ case EMAC_LINK_SPEED_10_FULL:
+ return "10 Mbps Duplex Full";
+ case EMAC_LINK_SPEED_10_HALF:
+ return "10 Mbps Duplex HALF";
+ default:
+ return "unknown speed";
+ }
+}
+
+/* Check link status and handle link state changes */
+static void emac_work_thread_link_check(struct emac_adapter *adpt)
+{
+ struct net_device *netdev = adpt->netdev;
+ struct emac_phy *phy = &adpt->phy;
+
+ char *speed;
const char *speed;
+
+ if (!test_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status))
+ return;
+ clear_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status);
+
+ /* ensure that no reset is in progress while link task is running */
+ while (test_and_set_bit(EMAC_STATUS_RESETTING, &adpt->status))
+ msleep(20); /* Reset might take few 10s of ms */
+
+ if (test_bit(EMAC_STATUS_DOWN, &adpt->status))
+ goto link_task_done;
+
+ emac_phy_link_check(adpt, &phy->link_speed, &phy->link_up);
+ speed = emac_link_speed_to_str(phy->link_speed);
+
+ if (phy->link_up) {
+ if (netif_carrier_ok(netdev))
+ goto link_task_done;
+
+ pm_runtime_get_sync(netdev->dev.parent);
+ netif_info(adpt, timer, adpt->netdev, "NIC Link is Up %s\n",
+ speed);
+
+ emac_mac_start(adpt);
+ netif_carrier_on(netdev);
+ netif_wake_queue(netdev);
+ } else {
+ if (time_after(adpt->link_chk_timeout, jiffies))
+ set_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status);
+
+ /* only continue if link was up previously */
+ if (!netif_carrier_ok(netdev))
+ goto link_task_done;
+
+ phy->link_speed = 0;
+ netif_info(adpt, timer, adpt->netdev, "NIC Link is Down\n");
+ netif_stop_queue(netdev);
+ netif_carrier_off(netdev);
+
+ emac_mac_stop(adpt);
+ pm_runtime_put_sync(netdev->dev.parent);
+ }
+
+ /* link state transition, kick timer */
+ mod_timer(&adpt->timers, jiffies);
+
+link_task_done:
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+}
+
+/* Watchdog task routine */
+static void emac_work_thread(struct work_struct *work)
+{
+ struct emac_adapter *adpt = container_of(work, struct emac_adapter,
+ work_thread);
+
+ if (!test_bit(EMAC_STATUS_WATCH_DOG, &adpt->status))
+ netif_warn(adpt, timer, adpt->netdev,
+ "warning: WATCH_DOG flag isn't set\n");
+
+ if (test_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status)) {
+ clear_bit(EMAC_STATUS_TASK_REINIT_REQ, &adpt->status);
+
+ if ((!test_bit(EMAC_STATUS_DOWN, &adpt->status)) &&
+ (!test_bit(EMAC_STATUS_RESETTING, &adpt->status)))
+ emac_reinit_locked(adpt);
+ }
+
+ emac_work_thread_link_check(adpt);
+ emac_phy_periodic_check(adpt);
+ clear_bit(EMAC_STATUS_WATCH_DOG, &adpt->status);
+}
+
+/* Timer routine */
+static void emac_timer_thread(unsigned long data)
+{
+ struct emac_adapter *adpt = (struct emac_adapter *)data;
+ unsigned long delay;
+
+ if (pm_runtime_status_suspended(adpt->netdev->dev.parent))
+ return;
+
+ /* poll faster when waiting for link */
+ if (test_bit(EMAC_STATUS_TASK_LSC_REQ, &adpt->status))
+ delay = HZ / 10;
+ else
+ delay = 2 * HZ;
+
+ /* Reset the timer */
+ mod_timer(&adpt->timers, delay + jiffies);
+
+ emac_work_thread_reschedule(adpt);
+}
+
+/* Initialize various data structures */
+static void emac_init_adapter(struct emac_adapter *adpt)
+{
+ struct emac_phy *phy = &adpt->phy;
+ int max_frame;
+ u32 reg;
+
+ /* ids */
+ reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL);
+ adpt->devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT;
+ adpt->revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT;
+
+ /* descriptors */
+ adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS;
+ adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS;
+
+ /* mtu */
+ adpt->netdev->mtu = ETH_DATA_LEN;
+ adpt->mtu = adpt->netdev->mtu;
+ max_frame = adpt->netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
+ adpt->rxbuf_size = adpt->netdev->mtu > EMAC_DEF_RX_BUF_SIZE ?
+ ALIGN(max_frame, 8) : EMAC_DEF_RX_BUF_SIZE;
+
+ /* dma */
+ adpt->dma_order = emac_dma_ord_out;
+ adpt->dmar_block = emac_dma_req_4096;
+ adpt->dmaw_block = emac_dma_req_128;
+ adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF;
+ adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF;
+ adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF;
+ adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF;
+
+ /* link */
+ phy->link_up = false;
+ phy->link_speed = EMAC_LINK_SPEED_UNKNOWN;
+
+ /* flow control */
+ phy->req_fc_mode = EMAC_FC_FULL;
+ phy->cur_fc_mode = EMAC_FC_FULL;
+ phy->disable_fc_autoneg = false;
+
+ /* rss */
+ adpt->rss_initialized = false;
+ adpt->rss_hstype = 0;
+ adpt->rss_idt_size = 0;
+ adpt->rss_base_cpu = 0;
+ memset(adpt->rss_idt, 0x0, sizeof(adpt->rss_idt));
+ memset(adpt->rss_key, 0x0, sizeof(adpt->rss_key));
+
+ /* irq moderator */
+ reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) |
+ ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT);
+ adpt->irq_mod = reg;
+
+ /* others */
+ adpt->preamble = EMAC_PREAMBLE_DEF;
+ adpt->wol = EMAC_WOL_MAGIC | EMAC_WOL_PHY;
+}
+
+#ifdef CONFIG_PM
+static int emac_runtime_suspend(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ emac_mac_pm(adpt, adpt->phy.link_speed, !!adpt->wol,
+ !!(adpt->wol & EMAC_WOL_MAGIC));
+ return 0;
+}
+
+static int emac_runtime_idle(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+
+ /* schedule to enter runtime suspend state if the link does
+ * not come back up within the specified time
+ */
+ pm_schedule_suspend(netdev->dev.parent,
+ jiffies_to_msecs(EMAC_TRY_LINK_TIMEOUT));
+ return -EBUSY;
+}
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_PM_SLEEP
+static int emac_suspend(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_phy *phy = &adpt->phy;
+ int i;
+ u32 speed, adv_speed;
+ bool link_up = false;
+ int retval = 0;
+
+ /* cannot suspend if WOL is disabled */
+ if (!adpt->irq[EMAC_WOL_IRQ].irq)
+ return -EPERM;
+
+ netif_device_detach(netdev);
+ if (netif_running(netdev)) {
+ /* ensure no task is running and no reset is in progress */
+ while (test_and_set_bit(EMAC_STATUS_RESETTING, &adpt->status))
+ msleep(20); /* Reset might take few 10s of ms */
+
+ emac_mac_down(adpt, false);
+
+ clear_bit(EMAC_STATUS_RESETTING, &adpt->status);
+ }
+
+ emac_phy_link_check(adpt, &speed, &link_up);
+
+ if (link_up) {
+ adv_speed = EMAC_LINK_SPEED_10_HALF;
+ emac_phy_link_speed_get(adpt, &adv_speed);
+
+ retval = emac_phy_link_setup(adpt, adv_speed, true,
+ !adpt->phy.disable_fc_autoneg);
+ if (retval)
+ return retval;
+
+ link_up = false;
+ for (i = 0; i < EMAC_MAX_SETUP_LNK_CYCLE; i++) {
+ retval = emac_phy_link_check(adpt, &speed, &link_up);
+ if ((!retval) && link_up)
+ break;
+
+ /* link can take upto few seconds to come up */
"up to"
+ msleep(100);
+ }
+ }
+
+ if (!link_up)
+ speed = EMAC_LINK_SPEED_10_HALF;
+
+ phy->link_speed = speed;
+ phy->link_up = link_up;
+
+ emac_mac_wol_config(adpt, adpt->wol);
+ emac_mac_pm(adpt, phy->link_speed, !!adpt->wol,
+ !!(adpt->wol & EMAC_WOL_MAGIC));
+ return 0;
+}
+
+static int emac_resume(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+ struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_phy *phy = &adpt->phy;
+ u32 retval;
+
+ emac_mac_reset(adpt);
+ retval = emac_phy_link_setup(adpt, phy->autoneg_advertised, true,
+ !phy->disable_fc_autoneg);
+ if (retval)
+ return retval;
+
+ emac_mac_wol_config(adpt, 0);
+ if (netif_running(netdev)) {
+ retval = emac_mac_up(adpt);
+ if (retval)
+ return retval;
+ }
+
+ netif_device_attach(netdev);
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+/* Get the clock */
+static int emac_clks_get(struct platform_device *pdev,
+ struct emac_adapter *adpt)
+{
+ struct clk *clk;
+ int i;
+
+ for (i = 0; i < EMAC_CLK_CNT; i++) {
+ clk = clk_get(&pdev->dev, emac_clk_name[i]);
+
+ if (IS_ERR(clk)) {
+ netdev_err(adpt->netdev, "error:%ld on clk_get(%s)\n",
+ PTR_ERR(clk), emac_clk_name[i]);
+
+ while (--i >= 0)
+ if (adpt->clk[i])
+ clk_put(adpt->clk[i]);
+ return PTR_ERR(clk);
+ }
+
+ adpt->clk[i] = clk;
+ }
+
+ return 0;
+}
+
+/* Initialize clocks */
+static int emac_clks_phase1_init(struct emac_adapter *adpt)
+{
+ int retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]);
+ if (retval)
+ return retval;
+
+ retval = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED],
+ EMC_CLK_RATE_19_2MHZ);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+
+ return retval;
Just do "return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);"
+}
+
+/* Enable clocks; needs emac_clks_phase1_init to be called before */
+static int emac_clks_phase2_init(struct emac_adapter *adpt)
+{
+ int retval;
+
+ retval = clk_set_rate(adpt->clk[EMAC_CLK_TX], EMC_CLK_RATE_125MHZ);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]);
+ if (retval)
+ return retval;
+
+ retval = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED],
+ EMC_CLK_RATE_125MHZ);
+ if (retval)
+ return retval;
+
+ retval = clk_set_rate(adpt->clk[EMAC_CLK_MDIO],
+ EMC_CLK_RATE_25MHZ);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]);
+ if (retval)
+ return retval;
+
+ retval = clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]);
+
+ return retval;
Same here
+}
+
+static void emac_clks_phase1_teardown(struct emac_adapter *adpt)
+{
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_AXI]);
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_CFG_AHB]);
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+}
+
+static void emac_clks_phase2_teardown(struct emac_adapter *adpt)
+{
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_TX]);
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_MDIO]);
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_RX]);
+ clk_disable_unprepare(adpt->clk[EMAC_CLK_SYS]);
+}
+
+/* Get the resources */
+static int emac_probe_resources(struct platform_device *pdev,
+ struct emac_adapter *adpt)
+{
+ struct net_device *netdev = adpt->netdev;
+ struct device_node *node = pdev->dev.of_node;
+ struct resource *res;
+ const void *maddr;
+ int retval = 0;
+ int i;
+
+ if (!node)
+ return -ENODEV;
+
+ /* get id */
+ retval = of_property_read_u32(node, "cell-index", &pdev->id);
+ if (retval)
+ return retval;
+
+ /* get time stamp enable flag */
+ adpt->timestamp_en = of_property_read_bool(node, "qcom,emac-tstamp-en");
+
+ /* get gpios */
+ for (i = 0; adpt->phy.uses_gpios && i < EMAC_GPIO_CNT; i++) {
+ retval = of_get_named_gpio(node, emac_gpio_name[i], 0);
+ if (retval < 0)
+ return retval;
+
+ adpt->gpio[i] = retval;
+ }
+
+ /* get mac address */
+ maddr = of_get_mac_address(node);
+ if (!maddr)
+ return -ENODEV;
+
+ memcpy(adpt->mac_perm_addr, maddr, netdev->addr_len);
+
+ /* get irqs */
+ for (i = 0; i < EMAC_IRQ_CNT; i++) {
+ retval = platform_get_irq_byname(pdev,
+ emac_irq_cfg_tbl[i].name);
+ adpt->irq[i].irq = (retval > 0) ? retval : 0;
+ }
+
+ retval = emac_clks_get(pdev, adpt);
+ if (retval)
+ return retval;
+
+ /* get register addresses */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "base");
+ if (!res) {
+ netdev_err(adpt->netdev, "error: missing 'base' resource\n");
+ retval = -ENXIO;
+ goto err_reg_res;
+ }
+
+ adpt->base = devm_ioremap_resource(&pdev->dev, res);
+ if (!adpt->base) {
+ retval = -ENOMEM;
+ goto err_reg_res;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csr");
+ if (!res) {
+ netdev_err(adpt->netdev, "error: missing 'csr' resource\n");
+ retval = -ENXIO;
+ goto err_reg_res;
+ }
+
+ adpt->csr = devm_ioremap_resource(&pdev->dev, res);
+ if (!adpt->csr) {
+ retval = -ENOMEM;
+ goto err_reg_res;
+ }
+
+ netdev->base_addr = (unsigned long)adpt->base;
+ return 0;
+
+err_reg_res:
+ for (i = 0; i < EMAC_CLK_CNT; i++) {
+ if (adpt->clk[i])
+ clk_put(adpt->clk[i]);
+ }
+
+ return retval;
+}
+
+/* Release resources */
+static void emac_release_resources(struct emac_adapter *adpt)
+{
+ int i;
+
+ for (i = 0; i < EMAC_CLK_CNT; i++) {
+ if (adpt->clk[i])
+ clk_put(adpt->clk[i]);
Do you need
adpt->clk[i] = NULL;
here and everywhere else you call clk_put()?
+ }
+}
+
+/* Probe function */
+static int emac_probe(struct platform_device *pdev)
+{
+ struct net_device *netdev;
+ struct emac_adapter *adpt;
+ struct emac_phy *phy;
+ int i, retval = 0;
+ u32 hw_ver;
+
+ netdev = alloc_etherdev(sizeof(struct emac_adapter));
+ if (!netdev)
+ return -ENOMEM;
+
+ dev_set_drvdata(&pdev->dev, netdev);
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ adpt = netdev_priv(netdev);
+ adpt->netdev = netdev;
+ phy = &adpt->phy;
+ adpt->msg_enable = netif_msg_init(debug, EMAC_MSG_DEFAULT);
+
+ adpt->dma_mask = DMA_BIT_MASK(32);
+ pdev->dev.dma_mask = &adpt->dma_mask;
+ pdev->dev.dma_parms = &adpt->dma_parms;
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
How about dma_set_mask_and_coherent()? Or maybe
dma_coerce_mask_and_coherent().
+
+ dma_set_max_seg_size(&pdev->dev, 65536);
+ dma_set_seg_boundary(&pdev->dev, 0xffffffff);
+
+ for (i = 0; i < EMAC_IRQ_CNT; i++) {
+ adpt->irq[i].idx = i;
+ adpt->irq[i].mask = emac_irq_cfg_tbl[i].init_mask;
+ }
+ adpt->irq[0].mask |= (emac_irq_use_extended ? IMR_EXTENDED_MASK :
+ IMR_NORMAL_MASK);
+
+ retval = emac_probe_resources(pdev, adpt);
+ if (retval)
+ goto err_undo_netdev;
+
+ /* initialize clocks */
+ retval = emac_clks_phase1_init(adpt);
+ if (retval)
+ goto err_undo_resources;
+
+ hw_ver = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION);
+
+ netdev->watchdog_timeo = EMAC_WATCHDOG_TIME;
+ netdev->irq = adpt->irq[0].irq;
+
+ if (adpt->timestamp_en)
+ adpt->rrd_size = EMAC_TS_RRD_SIZE;
+ else
+ adpt->rrd_size = EMAC_RRD_SIZE;
+
+ adpt->tpd_size = EMAC_TPD_SIZE;
+ adpt->rfd_size = EMAC_RFD_SIZE;
+
+ /* init netdev */
+ netdev->netdev_ops = &emac_netdev_ops;
+
+ /* init adapter */
+ emac_init_adapter(adpt);
+
+ /* init phy */
+ retval = emac_phy_config(pdev, adpt);
+ if (retval)
+ goto err_undo_clk_phase1;
+
+ /* enable clocks */
+ retval = emac_clks_phase2_init(adpt);
+ if (retval)
+ goto err_undo_clk_phase1;
+
+ /* init external phy */
+ retval = emac_phy_external_init(adpt);
+ if (retval)
+ goto err_undo_clk_phase2;
+
+ /* reset mac */
+ emac_mac_reset(adpt);
+
+ /* setup link to put it in a known good starting state */
+ retval = emac_phy_link_setup(adpt, phy->autoneg_advertised, true,
+ !phy->disable_fc_autoneg);
+ if (retval)
+ goto err_undo_clk_phase2;
+
+ /* set mac address */
+ memcpy(adpt->mac_addr, adpt->mac_perm_addr, netdev->addr_len);
+ memcpy(netdev->dev_addr, adpt->mac_addr, netdev->addr_len);
+ emac_mac_addr_clear(adpt, adpt->mac_addr);
+
+ /* set hw features */
+ netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
+ NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX |
+ NETIF_F_HW_VLAN_CTAG_TX;
+ netdev->hw_features = netdev->features;
+
+ netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM |
+ NETIF_F_TSO | NETIF_F_TSO6;
+
+ setup_timer(&adpt->timers, &emac_timer_thread,
+ (unsigned long)adpt);
+ INIT_WORK(&adpt->work_thread, emac_work_thread);
+
+ /* Initialize queues */
+ emac_mac_rx_tx_ring_init_all(pdev, adpt);
+
+ for (i = 0; i < adpt->rx_q_cnt; i++)
+ netif_napi_add(netdev, &adpt->rx_q[i].napi,
+ emac_napi_rtx, 64);
+
+ spin_lock_init(&adpt->tx_ts_lock);
+ skb_queue_head_init(&adpt->tx_ts_pending_queue);
+ skb_queue_head_init(&adpt->tx_ts_ready_queue);
+ INIT_WORK(&adpt->tx_ts_task, emac_mac_tx_ts_periodic_routine);
+
+ set_bit(EMAC_STATUS_VLANSTRIP_EN, &adpt->status);
+ set_bit(EMAC_STATUS_DOWN, &adpt->status);
+ strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
+
+ retval = register_netdev(netdev);
+ if (retval)
+ goto err_undo_clk_phase2;
+
+ pr_info("%s - version %s\n", emac_drv_description, emac_drv_version);
Should be dev_info or dev_dbg instead.
+ netif_dbg(adpt, probe, adpt->netdev, "EMAC HW ID %d.%d\n", adpt->devid,
+ adpt->revid);
+ netif_dbg(adpt, probe, adpt->netdev, "EMAC HW version %d.%d.%d\n",
+ (hw_ver & MAJOR_BMSK) >> MAJOR_SHFT,
+ (hw_ver & MINOR_BMSK) >> MINOR_SHFT,
+ (hw_ver & STEP_BMSK) >> STEP_SHFT);
+ return 0;
+
+err_undo_clk_phase2:
+ emac_clks_phase2_teardown(adpt);
+err_undo_clk_phase1:
+ emac_clks_phase1_teardown(adpt);
+err_undo_resources:
+ emac_release_resources(adpt);
+err_undo_netdev:
+ free_netdev(netdev);
+ return retval;
+}
+
+static int emac_remove(struct platform_device *pdev)
+{
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+ struct emac_adapter *adpt = netdev_priv(netdev);
+
+ pr_info("removing %s\n", emac_drv_name);
Should be dev_dbg() instead, I think.
+
+ unregister_netdev(netdev);
+ emac_clks_phase2_teardown(adpt);
+ emac_clks_phase1_teardown(adpt);
+ emac_release_resources(adpt);
+ free_netdev(netdev);
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ return 0;
+}
+
+static const struct dev_pm_ops emac_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(
+ emac_suspend,
+ emac_resume
+ )
+ SET_RUNTIME_PM_OPS(
+ emac_runtime_suspend,
+ NULL,
+ emac_runtime_idle
+ )
+};
+
+static const struct of_device_id emac_dt_match[] = {
+ {
+ .compatible = "qcom,emac",
+ },
+ {}
+};
+
+static struct platform_driver emac_platform_driver = {
+ .probe = emac_probe,
+ .remove = emac_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = emac_drv_name,
+ .pm = &emac_pm_ops,
+ .of_match_table = emac_dt_match,
+ },
+};
+
+static int __init emac_module_init(void)
+{
+ return platform_driver_register(&emac_platform_driver);
+}
+
+static void __exit emac_module_exit(void)
+{
+ platform_driver_unregister(&emac_platform_driver);
+}
+
+module_init(emac_module_init);
+module_exit(emac_module_exit);
Can you use module_platform_driver instead?
+
+MODULE_LICENSE("GPL");
"GPL v2"?
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.h b/drivers/net/ethernet/qualcomm/emac/emac.h
new file mode 100644
index 0000000..65b0369
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac.h
@@ -0,0 +1,427 @@
+/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _EMAC_H_
+#define _EMAC_H_
+
+#include <asm/byteorder.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include "emac-mac.h"
+#include "emac-phy.h"
+
+/* EMAC base register offsets */
+#define EMAC_DMA_MAS_CTRL 0x001400
+#define EMAC_IRQ_MOD_TIM_INIT 0x001408
+#define EMAC_BLK_IDLE_STS 0x00140c
+#define EMAC_PHY_LINK_DELAY 0x00141c
+#define EMAC_SYS_ALIV_CTRL 0x001434
+#define EMAC_MAC_IPGIFG_CTRL 0x001484
+#define EMAC_MAC_STA_ADDR0 0x001488
+#define EMAC_MAC_STA_ADDR1 0x00148c
+#define EMAC_HASH_TAB_REG0 0x001490
+#define EMAC_HASH_TAB_REG1 0x001494
+#define EMAC_MAC_HALF_DPLX_CTRL 0x001498
+#define EMAC_MAX_FRAM_LEN_CTRL 0x00149c
+#define EMAC_INT_STATUS 0x001600
+#define EMAC_INT_MASK 0x001604
+#define EMAC_RXMAC_STATC_REG0 0x001700
+#define EMAC_RXMAC_STATC_REG22 0x001758
+#define EMAC_TXMAC_STATC_REG0 0x001760
+#define EMAC_TXMAC_STATC_REG24 0x0017c0
+#define EMAC_CORE_HW_VERSION 0x001974
+#define EMAC_IDT_TABLE0 0x001b00
+#define EMAC_RXMAC_STATC_REG23 0x001bc8
+#define EMAC_RXMAC_STATC_REG24 0x001bcc
+#define EMAC_TXMAC_STATC_REG25 0x001bd0
+#define EMAC_INT1_MASK 0x001bf0
+#define EMAC_INT1_STATUS 0x001bf4
+#define EMAC_INT2_MASK 0x001bf8
+#define EMAC_INT2_STATUS 0x001bfc
+#define EMAC_INT3_MASK 0x001c00
+#define EMAC_INT3_STATUS 0x001c04
+
+/* EMAC_DMA_MAS_CTRL */
+#define DEV_ID_NUM_BMSK 0x7f000000
+#define DEV_ID_NUM_SHFT 24
+#define DEV_REV_NUM_BMSK 0xff0000
+#define DEV_REV_NUM_SHFT 16
+#define INT_RD_CLR_EN 0x4000
+#define IRQ_MODERATOR2_EN 0x800
+#define IRQ_MODERATOR_EN 0x400
+#define LPW_CLK_SEL 0x80
+#define LPW_STATE 0x20
+#define LPW_MODE 0x10
+#define SOFT_RST 0x1
+
+/* EMAC_IRQ_MOD_TIM_INIT */
+#define IRQ_MODERATOR2_INIT_BMSK 0xffff0000
+#define IRQ_MODERATOR2_INIT_SHFT 16
+#define IRQ_MODERATOR_INIT_BMSK 0xffff
+#define IRQ_MODERATOR_INIT_SHFT 0
+
+/* EMAC_INT_STATUS */
+#define DIS_INT 0x80000000
+#define PTP_INT 0x40000000
+#define RFD4_UR_INT 0x20000000
+#define TX_PKT_INT3 0x4000000
+#define TX_PKT_INT2 0x2000000
+#define TX_PKT_INT1 0x1000000
+#define RX_PKT_INT3 0x80000
+#define RX_PKT_INT2 0x40000
+#define RX_PKT_INT1 0x20000
+#define RX_PKT_INT0 0x10000
+#define TX_PKT_INT 0x8000
+#define TXQ_TO_INT 0x4000
+#define GPHY_WAKEUP_INT 0x2000
+#define GPHY_LINK_DOWN_INT 0x1000
+#define GPHY_LINK_UP_INT 0x800
+#define DMAW_TO_INT 0x400
+#define DMAR_TO_INT 0x200
+#define TXF_UR_INT 0x100
+#define RFD3_UR_INT 0x80
+#define RFD2_UR_INT 0x40
+#define RFD1_UR_INT 0x20
+#define RFD0_UR_INT 0x10
+#define RXF_OF_INT 0x8
+#define SW_MAN_INT 0x4
+
+/* EMAC_MAILBOX_6 */
+#define RFD2_PROC_IDX_BMSK 0xfff0000
+#define RFD2_PROC_IDX_SHFT 16
+#define RFD2_PROD_IDX_BMSK 0xfff
+#define RFD2_PROD_IDX_SHFT 0
+
+/* EMAC_CORE_HW_VERSION */
+#define MAJOR_BMSK 0xf0000000
+#define MAJOR_SHFT 28
+#define MINOR_BMSK 0xfff0000
+#define MINOR_SHFT 16
+#define STEP_BMSK 0xffff
+#define STEP_SHFT 0
+
+/* EMAC_EMAC_WRAPPER_CSR1 */
+#define TX_INDX_FIFO_SYNC_RST 0x800000
+#define TX_TS_FIFO_SYNC_RST 0x400000
+#define RX_TS_FIFO2_SYNC_RST 0x200000
+#define RX_TS_FIFO1_SYNC_RST 0x100000
+#define TX_TS_ENABLE 0x10000
+#define DIS_1588_CLKS 0x800
+#define FREQ_MODE 0x200
+#define ENABLE_RRD_TIMESTAMP 0x8
+
+/* EMAC_EMAC_WRAPPER_CSR2 */
+#define HDRIVE_BMSK 0x3000
+#define HDRIVE_SHFT 12
+#define SLB_EN 0x200
+#define PLB_EN 0x100
+#define WOL_EN 0x80
+#define PHY_RESET 0x1
+
+/* Device IDs */
+#define EMAC_DEV_ID 0x0040
+
+/* 4 emac core irq and 1 wol irq */
+#define EMAC_NUM_CORE_IRQ 4
+#define EMAC_WOL_IRQ 4
+#define EMAC_IRQ_CNT 5
+/* mdio/mdc gpios */
+#define EMAC_GPIO_CNT 2
+
+enum emac_clk_id {
+ EMAC_CLK_AXI,
+ EMAC_CLK_CFG_AHB,
+ EMAC_CLK_HIGH_SPEED,
+ EMAC_CLK_MDIO,
+ EMAC_CLK_TX,
+ EMAC_CLK_RX,
+ EMAC_CLK_SYS,
+ EMAC_CLK_CNT
+};
+
+#define KHz(RATE) ((RATE) * 1000)
+#define MHz(RATE) (KHz(RATE) * 1000)
+
+enum emac_clk_rate {
+ EMC_CLK_RATE_2_5MHZ = KHz(2500),
+ EMC_CLK_RATE_19_2MHZ = KHz(19200),
+ EMC_CLK_RATE_25MHZ = MHz(25),
+ EMC_CLK_RATE_125MHZ = MHz(125),
+};
+
+#define EMAC_LINK_SPEED_UNKNOWN 0x0
+#define EMAC_LINK_SPEED_10_HALF 0x0001
+#define EMAC_LINK_SPEED_10_FULL 0x0002
+#define EMAC_LINK_SPEED_100_HALF 0x0004
+#define EMAC_LINK_SPEED_100_FULL 0x0008
+#define EMAC_LINK_SPEED_1GB_FULL 0x0020
+
+#define EMAC_MAX_SETUP_LNK_CYCLE 100
+
+/* Wake On Lan */
+#define EMAC_WOL_PHY 0x00000001 /* PHY Status Change */
+#define EMAC_WOL_MAGIC 0x00000002 /* Magic Packet */
+
+struct emac_stats {
+ /* rx */
+ u64 rx_ok; /* good packets */
+ u64 rx_bcast; /* good broadcast packets */
+ u64 rx_mcast; /* good multicast packets */
+ u64 rx_pause; /* pause packet */
+ u64 rx_ctrl; /* control packets other than pause frame. */
+ u64 rx_fcs_err; /* packets with bad FCS. */
+ u64 rx_len_err; /* packets with length mismatch */
+ u64 rx_byte_cnt; /* good bytes count (without FCS) */
+ u64 rx_runt; /* runt packets */
+ u64 rx_frag; /* fragment count */
+ u64 rx_sz_64; /* packets that are 64 bytes */
+ u64 rx_sz_65_127; /* packets that are 65-127 bytes */
+ u64 rx_sz_128_255; /* packets that are 128-255 bytes */
+ u64 rx_sz_256_511; /* packets that are 256-511 bytes */
+ u64 rx_sz_512_1023; /* packets that are 512-1023 bytes */
+ u64 rx_sz_1024_1518; /* packets that are 1024-1518 bytes */
+ u64 rx_sz_1519_max; /* packets that are 1519-MTU bytes*/
+ u64 rx_sz_ov; /* packets that are >MTU bytes (truncated) */
+ u64 rx_rxf_ov; /* packets dropped due to RX FIFO overflow */
+ u64 rx_align_err; /* alignment errors */
+ u64 rx_bcast_byte_cnt; /* broadcast packets byte count (without FCS) */
+ u64 rx_mcast_byte_cnt; /* multicast packets byte count (without FCS) */
+ u64 rx_err_addr; /* packets dropped due to address filtering */
+ u64 rx_crc_align; /* CRC align errors */
+ u64 rx_jubbers; /* jubbers */
+
+ /* tx */
+ u64 tx_ok; /* good packets */
+ u64 tx_bcast; /* good broadcast packets */
+ u64 tx_mcast; /* good multicast packets */
+ u64 tx_pause; /* pause packets */
+ u64 tx_exc_defer; /* packets with excessive deferral */
+ u64 tx_ctrl; /* control packets other than pause frame */
+ u64 tx_defer; /* packets that are deferred. */
+ u64 tx_byte_cnt; /* good bytes count (without FCS) */
+ u64 tx_sz_64; /* packets that are 64 bytes */
+ u64 tx_sz_65_127; /* packets that are 65-127 bytes */
+ u64 tx_sz_128_255; /* packets that are 128-255 bytes */
+ u64 tx_sz_256_511; /* packets that are 256-511 bytes */
+ u64 tx_sz_512_1023; /* packets that are 512-1023 bytes */
+ u64 tx_sz_1024_1518; /* packets that are 1024-1518 bytes */
+ u64 tx_sz_1519_max; /* packets that are 1519-MTU bytes */
+ u64 tx_1_col; /* packets single prior collision */
+ u64 tx_2_col; /* packets with multiple prior collisions */
+ u64 tx_late_col; /* packets with late collisions */
+ u64 tx_abort_col; /* packets aborted due to excess collisions */
+ u64 tx_underrun; /* packets aborted due to FIFO underrun */
+ u64 tx_rd_eop; /* count of reads beyond EOP */
+ u64 tx_len_err; /* packets with length mismatch */
+ u64 tx_trunc; /* packets truncated due to size >MTU */
+ u64 tx_bcast_byte; /* broadcast packets byte count (without FCS) */
+ u64 tx_mcast_byte; /* multicast packets byte count (without FCS) */
+ u64 tx_col; /* collisions */
+};
+
+enum emac_status_bits {
+ EMAC_STATUS_PROMISC_EN,
+ EMAC_STATUS_VLANSTRIP_EN,
+ EMAC_STATUS_MULTIALL_EN,
+ EMAC_STATUS_LOOPBACK_EN,
+ EMAC_STATUS_TS_RX_EN,
+ EMAC_STATUS_TS_TX_EN,
+ EMAC_STATUS_RESETTING,
+ EMAC_STATUS_DOWN,
+ EMAC_STATUS_WATCH_DOG,
+ EMAC_STATUS_TASK_REINIT_REQ,
+ EMAC_STATUS_TASK_LSC_REQ,
+ EMAC_STATUS_TASK_CHK_SGMII_REQ,
+};
+
+/* RSS hstype Definitions */
+#define EMAC_RSS_HSTYP_IPV4_EN 0x00000001
+#define EMAC_RSS_HSTYP_TCP4_EN 0x00000002
+#define EMAC_RSS_HSTYP_IPV6_EN 0x00000004
+#define EMAC_RSS_HSTYP_TCP6_EN 0x00000008
+#define EMAC_RSS_HSTYP_ALL_EN (\
+ EMAC_RSS_HSTYP_IPV4_EN |\
+ EMAC_RSS_HSTYP_TCP4_EN |\
+ EMAC_RSS_HSTYP_IPV6_EN |\
+ EMAC_RSS_HSTYP_TCP6_EN)
+
+#define EMAC_VLAN_TO_TAG(_vlan, _tag) \
+ (_tag = ((((_vlan) >> 8) & 0xFF) | (((_vlan) & 0xFF) << 8)))
+
+#define EMAC_TAG_TO_VLAN(_tag, _vlan) \
+ (_vlan = ((((_tag) >> 8) & 0xFF) | (((_tag) & 0xFF) << 8)))
+
+#define EMAC_DEF_RX_BUF_SIZE 1536
+#define EMAC_MAX_JUMBO_PKT_SIZE (9 * 1024)
+#define EMAC_MAX_TX_OFFLOAD_THRESH (9 * 1024)
+
+#define EMAC_MAX_ETH_FRAME_SIZE EMAC_MAX_JUMBO_PKT_SIZE
+#define EMAC_MIN_ETH_FRAME_SIZE 68
+
+#define EMAC_MAX_TX_QUEUES 4
+#define EMAC_DEF_TX_QUEUES 1
+#define EMAC_ACTIVE_TXQ 0
+
+#define EMAC_MAX_RX_QUEUES 4
+#define EMAC_DEF_RX_QUEUES 1
+
+#define EMAC_MIN_TX_DESCS 128
+#define EMAC_MIN_RX_DESCS 128
+
+#define EMAC_MAX_TX_DESCS 16383
+#define EMAC_MAX_RX_DESCS 2047
+
+#define EMAC_DEF_TX_DESCS 512
+#define EMAC_DEF_RX_DESCS 256
+
+#define EMAC_DEF_RX_IRQ_MOD 250
+#define EMAC_DEF_TX_IRQ_MOD 250
+
+#define EMAC_WATCHDOG_TIME (5 * HZ)
+
+/* by default check link every 4 seconds */
+#define EMAC_TRY_LINK_TIMEOUT (4 * HZ)
+
+/* emac_irq per-device (per-adapter) irq properties.
+ * @idx: index of this irq entry in the adapter irq array.
+ * @irq: irq number.
+ * @mask mask to use over status register.
+ */
+struct emac_irq {
+ int idx;
+ unsigned int irq;
+ u32 mask;
+};
+
+/* emac_irq_config irq properties which are common to all devices of this driver
+ * @name name in configuration (devicetree).
+ * @handler ISR.
+ * @status_reg status register offset.
+ * @mask_reg mask register offset.
+ * @init_mask initial value for mask to use over status register.
+ * @irqflags request_irq() flags.
+ */
+struct emac_irq_config {
+ char *name;
+ irq_handler_t handler;
+
+ u32 status_reg;
+ u32 mask_reg;
+ u32 init_mask;
+
+ unsigned long irqflags;
+};
+
+/* emac_irq_cfg_tbl a table of common irq properties to all devices of this
+ * driver.
+ */
+extern const struct emac_irq_config emac_irq_cfg_tbl[];
+
+/* The device's main data structure */
+struct emac_adapter {
+ struct net_device *netdev;
+
+ void __iomem *base;
+ void __iomem *csr;
+
+ struct emac_phy phy;
+ struct emac_stats stats;
+
+ struct emac_irq irq[EMAC_IRQ_CNT];
+ unsigned int gpio[EMAC_GPIO_CNT];
+ struct clk *clk[EMAC_CLK_CNT];
+
+ /* dma parameters */
+ u64 dma_mask;
+ struct device_dma_parameters dma_parms;
+
+ /* All Descriptor memory */
+ struct emac_ring_header ring_header;
+ struct emac_tx_queue tx_q[EMAC_MAX_TX_QUEUES];
+ struct emac_rx_queue rx_q[EMAC_MAX_RX_QUEUES];
+ unsigned int tx_q_cnt;
+ unsigned int rx_q_cnt;
+ unsigned int tx_desc_cnt;
+ unsigned int rx_desc_cnt;
+ unsigned int rrd_size; /* in quad words */
+ unsigned int rfd_size; /* in quad words */
+ unsigned int tpd_size; /* in quad words */
+
+ unsigned int rxbuf_size;
+
+ u16 devid;
+ u16 revid;
+
+ /* Ring parameter */
+ u8 tpd_burst;
+ u8 rfd_burst;
+ unsigned int dmaw_dly_cnt;
+ unsigned int dmar_dly_cnt;
+ enum emac_dma_req_block dmar_block;
+ enum emac_dma_req_block dmaw_block;
+ enum emac_dma_order dma_order;
+
+ /* MAC parameter */
+ u8 mac_addr[ETH_ALEN];
+ u8 mac_perm_addr[ETH_ALEN];
+ u32 mtu;
+
+ /* RSS parameter */
+ u8 rss_hstype;
+ u8 rss_base_cpu;
+ u16 rss_idt_size;
+ u32 rss_idt[32];
+ u8 rss_key[40];
+ bool rss_initialized;
+
+ u32 irq_mod;
+ u32 preamble;
+
+ /* Tx time-stamping queue */
+ struct sk_buff_head tx_ts_pending_queue;
+ struct sk_buff_head tx_ts_ready_queue;
+ struct work_struct tx_ts_task;
+ spinlock_t tx_ts_lock; /* Tx timestamp que lock */
+ struct emac_tx_ts_stats tx_ts_stats;
+
+ struct work_struct work_thread;
+ struct timer_list timers;
+ unsigned long link_chk_timeout;
+
+ bool timestamp_en;
+ u32 wol; /* Wake On Lan options */
+ u16 msg_enable;
+ unsigned long status;
+};
+
+static inline struct emac_adapter *emac_irq_get_adpt(struct emac_irq *irq)
+{
+ struct emac_irq *irq_0 = irq - irq->idx;
Blank link here, please
+ /* why using __builtin_offsetof() and not container_of() ?
+ * container_of(irq_0, struct emac_adapter, irq) fails to compile
+ * because emac->irq is of array type.
+ */
+ return (struct emac_adapter *)
+ ((char *)irq_0 - __builtin_offsetof(struct emac_adapter, irq));
+}
+
+void emac_reinit_locked(struct emac_adapter *adpt);
+void emac_work_thread_reschedule(struct emac_adapter *adpt);
+void emac_lsc_schedule_check(struct emac_adapter *adpt);
+void emac_rx_mode_set(struct net_device *netdev);
+void emac_reg_update32(void __iomem *addr, u32 mask, u32 val);
+
+extern const char * const emac_gpio_name[];
+
+#endif /* _EMAC_H_ */
--
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