[RFC,v3 02/10] dpaa_eth: add support for DPAA Ethernet

From: Madalin Bucur
Date: Wed Apr 29 2015 - 11:01:31 EST

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This introduces the Freescale Data Path Acceleration Architecture
(DPAA) Ethernet driver (dpaa_eth) that builds upon the DPAA QMan,
BMan, PAMU and FMan drivers to deliver Ethernet connectivity on
the Freescale DPAA QorIQ platforms.

Signed-off-by: Madalin Bucur <madalin.bucur@xxxxxxxxxxxxx>
---
drivers/net/ethernet/freescale/Kconfig | 2 +
drivers/net/ethernet/freescale/Makefile | 1 +
drivers/net/ethernet/freescale/dpaa/Kconfig | 46 +
drivers/net/ethernet/freescale/dpaa/Makefile | 13 +
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 829 +++++++++++++
drivers/net/ethernet/freescale/dpaa/dpaa_eth.h | 446 +++++++
.../net/ethernet/freescale/dpaa/dpaa_eth_common.c | 1280 ++++++++++++++++++++
.../net/ethernet/freescale/dpaa/dpaa_eth_common.h | 119 ++
drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c | 428 +++++++
9 files changed, 3164 insertions(+)
create mode 100644 drivers/net/ethernet/freescale/dpaa/Kconfig
create mode 100644 drivers/net/ethernet/freescale/dpaa/Makefile
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c

diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig
index 24e938d..36830a1 100644
--- a/drivers/net/ethernet/freescale/Kconfig
+++ b/drivers/net/ethernet/freescale/Kconfig
@@ -94,4 +94,6 @@ config GIANFAR
This driver supports the Gigabit TSEC on the MPC83xx, MPC85xx,
and MPC86xx family of chips, and the FEC on the 8540.

+source "drivers/net/ethernet/freescale/dpaa/Kconfig"
+
endif # NET_VENDOR_FREESCALE
diff --git a/drivers/net/ethernet/freescale/Makefile b/drivers/net/ethernet/freescale/Makefile
index 4097c58..ae13dc5 100644
--- a/drivers/net/ethernet/freescale/Makefile
+++ b/drivers/net/ethernet/freescale/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_FS_ENET) += fs_enet/
obj-$(CONFIG_FSL_PQ_MDIO) += fsl_pq_mdio.o
obj-$(CONFIG_FSL_XGMAC_MDIO) += xgmac_mdio.o
obj-$(CONFIG_GIANFAR) += gianfar_driver.o
+obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
obj-$(CONFIG_PTP_1588_CLOCK_GIANFAR) += gianfar_ptp.o
gianfar_driver-objs := gianfar.o \
gianfar_ethtool.o
diff --git a/drivers/net/ethernet/freescale/dpaa/Kconfig b/drivers/net/ethernet/freescale/dpaa/Kconfig
new file mode 100644
index 0000000..1f3a203
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/Kconfig
@@ -0,0 +1,46 @@
+menuconfig FSL_DPAA_ETH
+ tristate "DPAA Ethernet"
+ depends on FSL_SOC && FSL_BMAN && FSL_QMAN && FSL_FMAN
+ select PHYLIB
+ select FSL_FMAN_MAC
+ ---help---
+ Data Path Acceleration Architecture Ethernet driver,
+ supporting the Freescale QorIQ chips.
+ Depends on Freescale Buffer Manager and Queue Manager
+ driver and Frame Manager Driver.
+
+if FSL_DPAA_ETH
+
+config FSL_DPAA_CS_THRESHOLD_1G
+ hex "Egress congestion threshold on 1G ports"
+ range 0x1000 0x10000000
+ default "0x06000000"
+ ---help---
+ The size in bytes of the egress Congestion State notification threshold on 1G ports.
+ The 1G dTSECs can quite easily be flooded by cores doing Tx in a tight loop
+ (e.g. by sending UDP datagrams at "while(1) speed"),
+ and the larger the frame size, the more acute the problem.
+ So we have to find a balance between these factors:
+ - avoiding the device staying congested for a prolonged time (risking
+ the netdev watchdog to fire - see also the tx_timeout module param);
+ - affecting performance of protocols such as TCP, which otherwise
+ behave well under the congestion notification mechanism;
+ - preventing the Tx cores from tightly-looping (as if the congestion
+ threshold was too low to be effective);
+ - running out of memory if the CS threshold is set too high.
+
+config FSL_DPAA_CS_THRESHOLD_10G
+ hex "Egress congestion threshold on 10G ports"
+ range 0x1000 0x20000000
+ default "0x10000000"
+ ---help ---
+ The size in bytes of the egress Congestion State notification threshold on 10G ports.
+
+config FSL_DPAA_INGRESS_CS_THRESHOLD
+ hex "Ingress congestion threshold on FMan ports"
+ default "0x10000000"
+ ---help---
+ The size in bytes of the ingress tail-drop threshold on FMan ports.
+ Traffic piling up above this value will be rejected by QMan and discarded by FMan.
+
+endif # FSL_DPAA_ETH
diff --git a/drivers/net/ethernet/freescale/dpaa/Makefile b/drivers/net/ethernet/freescale/dpaa/Makefile
new file mode 100644
index 0000000..cf126dd
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile for the Freescale DPAA Ethernet controllers
+#
+
+# Include FMan headers
+FMAN = $(srctree)/drivers/net/ethernet/freescale/fman
+ccflags-y += -I$(FMAN)
+ccflags-y += -I$(FMAN)/inc
+ccflags-y += -I$(FMAN)/flib
+
+obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o
+
+fsl_dpa-objs += dpaa_eth.o dpaa_eth_sg.o dpaa_eth_common.o
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
new file mode 100644
index 0000000..80c3651
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -0,0 +1,829 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/kthread.h>
+#include <linux/io.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+#include <linux/icmp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/tcp.h>
+#include <linux/net.h>
+#include <linux/if_ether.h>
+#include <linux/highmem.h>
+#include <linux/percpu.h>
+#include <linux/dma-mapping.h>
+#include <soc/fsl/bman.h>
+
+#include "fsl_fman.h"
+#include "fm_ext.h"
+#include "fm_port_ext.h"
+
+#include "mac.h"
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+
+#define DPA_NAPI_WEIGHT 64
+
+/* Valid checksum indication */
+#define DPA_CSUM_VALID 0xFFFF
+
+#define DPA_DESCRIPTION "FSL DPAA Ethernet driver"
+
+static u8 debug = -1;
+module_param(debug, byte, S_IRUGO);
+MODULE_PARM_DESC(debug, "Module/Driver verbosity level");
+
+/* This has to work in tandem with the DPA_CS_THRESHOLD_xxx values. */
+static u16 tx_timeout = 1000;
+module_param(tx_timeout, ushort, S_IRUGO);
+MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");
+
+/* BM */
+
+#define DPAA_ETH_MAX_PAD (L1_CACHE_BYTES * 8)
+
+static u8 dpa_priv_common_bpid;
+
+static void _dpa_rx_error(struct net_device *net_dev,
+ const struct dpa_priv_s *priv,
+ struct dpa_percpu_priv_s *percpu_priv,
+ const struct qm_fd *fd,
+ u32 fqid)
+{
+ /* limit common, possibly innocuous Rx FIFO Overflow errors'
+ * interference with zero-loss convergence benchmark results.
+ */
+ if (likely(fd->status & FM_FD_STAT_ERR_PHYSICAL))
+ pr_warn_once("non-zero error counters in fman statistics (sysfs)\n");
+ else
+ if (net_ratelimit())
+ netif_err(priv, hw, net_dev, "Err FD status = 0x%08x\n",
+ fd->status & FM_FD_STAT_RX_ERRORS);
+
+ percpu_priv->stats.rx_errors++;
+
+ dpa_fd_release(net_dev, fd);
+}
+
+static void _dpa_tx_error(struct net_device *net_dev,
+ const struct dpa_priv_s *priv,
+ struct dpa_percpu_priv_s *percpu_priv,
+ const struct qm_fd *fd,
+ u32 fqid)
+{
+ struct sk_buff *skb;
+
+ if (net_ratelimit())
+ netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+ fd->status & FM_FD_STAT_TX_ERRORS);
+
+ percpu_priv->stats.tx_errors++;
+
+ /* If we intended the buffers from this frame to go into the bpools
+ * when the FMan transmit was done, we need to put it in manually.
+ */
+ if (fd->cmd & FM_FD_CMD_FCO) {
+ dpa_fd_release(net_dev, fd);
+ return;
+ }
+
+ skb = _dpa_cleanup_tx_fd(priv, fd);
+ dev_kfree_skb(skb);
+}
+
+static int dpaa_eth_poll(struct napi_struct *napi, int budget)
+{
+ struct dpa_napi_portal *np =
+ container_of(napi, struct dpa_napi_portal, napi);
+
+ int cleaned = qman_p_poll_dqrr(np->p, budget);
+
+ if (cleaned < budget) {
+ int tmp;
+
+ napi_complete(napi);
+ tmp = qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
+ DPA_ERR_ON(tmp);
+ }
+
+ return cleaned;
+}
+
+static void __hot _dpa_tx_conf(struct net_device *net_dev,
+ const struct dpa_priv_s *priv,
+ struct dpa_percpu_priv_s *percpu_priv,
+ const struct qm_fd *fd,
+ u32 fqid)
+{
+ struct sk_buff *skb;
+
+ if (unlikely(fd->status & FM_FD_STAT_TX_ERRORS) != 0) {
+ if (net_ratelimit())
+ netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+ fd->status & FM_FD_STAT_TX_ERRORS);
+
+ percpu_priv->stats.tx_errors++;
+ }
+
+ skb = _dpa_cleanup_tx_fd(priv, fd);
+
+ dev_kfree_skb(skb);
+}
+
+static enum qman_cb_dqrr_result
+priv_rx_error_dqrr(struct qman_portal *portal,
+ struct qman_fq *fq,
+ const struct qm_dqrr_entry *dq)
+{
+ struct net_device *net_dev;
+ struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv;
+ int *count_ptr;
+
+ net_dev = ((struct dpa_fq *)fq)->net_dev;
+ priv = netdev_priv(net_dev);
+
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+ count_ptr = raw_cpu_ptr(priv->dpa_bp->percpu_count);
+
+ if (dpaa_eth_napi_schedule(percpu_priv, portal))
+ return qman_cb_dqrr_stop;
+
+ if (unlikely(dpaa_eth_refill_bpools(priv->dpa_bp, count_ptr)))
+ /* Unable to refill the buffer pool due to insufficient
+ * system memory. Just release the frame back into the pool,
+ * otherwise we'll soon end up with an empty buffer pool.
+ */
+ dpa_fd_release(net_dev, &dq->fd);
+ else
+ _dpa_rx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+ return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result __hot
+priv_rx_default_dqrr(struct qman_portal *portal,
+ struct qman_fq *fq,
+ const struct qm_dqrr_entry *dq)
+{
+ struct net_device *net_dev;
+ struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv;
+ int *count_ptr;
+ struct dpa_bp *dpa_bp;
+
+ net_dev = ((struct dpa_fq *)fq)->net_dev;
+ priv = netdev_priv(net_dev);
+ dpa_bp = priv->dpa_bp;
+
+ /* IRQ handler, non-migratable; safe to use raw_cpu_ptr here */
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+ count_ptr = raw_cpu_ptr(dpa_bp->percpu_count);
+
+ if (unlikely(dpaa_eth_napi_schedule(percpu_priv, portal)))
+ return qman_cb_dqrr_stop;
+
+ /* Vale of plenty: make sure we didn't run out of buffers */
+
+ if (unlikely(dpaa_eth_refill_bpools(dpa_bp, count_ptr)))
+ /* Unable to refill the buffer pool due to insufficient
+ * system memory. Just release the frame back into the pool,
+ * otherwise we'll soon end up with an empty buffer pool.
+ */
+ dpa_fd_release(net_dev, &dq->fd);
+ else
+ _dpa_rx(net_dev, portal, priv, percpu_priv, &dq->fd, fq->fqid,
+ count_ptr);
+
+ return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result
+priv_tx_conf_error_dqrr(struct qman_portal *portal,
+ struct qman_fq *fq,
+ const struct qm_dqrr_entry *dq)
+{
+ struct net_device *net_dev;
+ struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv;
+
+ net_dev = ((struct dpa_fq *)fq)->net_dev;
+ priv = netdev_priv(net_dev);
+
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+ if (dpaa_eth_napi_schedule(percpu_priv, portal))
+ return qman_cb_dqrr_stop;
+
+ _dpa_tx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+ return qman_cb_dqrr_consume;
+}
+
+static enum qman_cb_dqrr_result __hot
+priv_tx_conf_default_dqrr(struct qman_portal *portal,
+ struct qman_fq *fq,
+ const struct qm_dqrr_entry *dq)
+{
+ struct net_device *net_dev;
+ struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv;
+
+ net_dev = ((struct dpa_fq *)fq)->net_dev;
+ priv = netdev_priv(net_dev);
+
+ /* Non-migratable context, safe to use raw_cpu_ptr */
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+ if (dpaa_eth_napi_schedule(percpu_priv, portal))
+ return qman_cb_dqrr_stop;
+
+ _dpa_tx_conf(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
+
+ return qman_cb_dqrr_consume;
+}
+
+static void priv_ern(struct qman_portal *portal,
+ struct qman_fq *fq,
+ const struct qm_mr_entry *msg)
+{
+ struct net_device *net_dev;
+ const struct dpa_priv_s *priv;
+ struct sk_buff *skb;
+ struct dpa_percpu_priv_s *percpu_priv;
+ struct qm_fd fd = msg->ern.fd;
+
+ net_dev = ((struct dpa_fq *)fq)->net_dev;
+ priv = netdev_priv(net_dev);
+ /* Non-migratable context, safe to use raw_cpu_ptr */
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+ percpu_priv->stats.tx_dropped++;
+ percpu_priv->stats.tx_fifo_errors++;
+
+ /* If we intended this buffer to go into the pool
+ * when the FM was done, we need to put it in
+ * manually.
+ */
+ if (msg->ern.fd.cmd & FM_FD_CMD_FCO) {
+ dpa_fd_release(net_dev, &fd);
+ return;
+ }
+
+ skb = _dpa_cleanup_tx_fd(priv, &fd);
+ dev_kfree_skb_any(skb);
+}
+
+static const struct dpa_fq_cbs_t private_fq_cbs = {
+ .rx_defq = { .cb = { .dqrr = priv_rx_default_dqrr } },
+ .tx_defq = { .cb = { .dqrr = priv_tx_conf_default_dqrr } },
+ .rx_errq = { .cb = { .dqrr = priv_rx_error_dqrr } },
+ .tx_errq = { .cb = { .dqrr = priv_tx_conf_error_dqrr } },
+ .egress_ern = { .cb = { .ern = priv_ern } }
+};
+
+static void dpaa_eth_napi_enable(struct dpa_priv_s *priv)
+{
+ struct dpa_percpu_priv_s *percpu_priv;
+ int i, j;
+
+ for_each_possible_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ for (j = 0; j < qman_portal_max; j++)
+ napi_enable(&percpu_priv->np[j].napi);
+ }
+}
+
+static void dpaa_eth_napi_disable(struct dpa_priv_s *priv)
+{
+ struct dpa_percpu_priv_s *percpu_priv;
+ int i, j;
+
+ for_each_possible_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ for (j = 0; j < qman_portal_max; j++)
+ napi_disable(&percpu_priv->np[j].napi);
+ }
+}
+
+static int dpa_eth_priv_start(struct net_device *net_dev)
+{
+ int err;
+ struct dpa_priv_s *priv;
+
+ priv = netdev_priv(net_dev);
+
+ dpaa_eth_napi_enable(priv);
+
+ err = dpa_start(net_dev);
+ if (err < 0)
+ dpaa_eth_napi_disable(priv);
+
+ return err;
+}
+
+static int dpa_eth_priv_stop(struct net_device *net_dev)
+{
+ int err;
+ struct dpa_priv_s *priv;
+
+ err = dpa_stop(net_dev);
+ /* Allow NAPI to consume any frame still in the Rx/TxConfirm
+ * ingress queues. This is to avoid a race between the current
+ * context and ksoftirqd which could leave NAPI disabled while
+ * in fact there's still Rx traffic to be processed.
+ */
+ usleep_range(5000, 10000);
+
+ priv = netdev_priv(net_dev);
+ dpaa_eth_napi_disable(priv);
+
+ return err;
+}
+
+static const struct net_device_ops dpa_private_ops = {
+ .ndo_open = dpa_eth_priv_start,
+ .ndo_start_xmit = dpa_tx,
+ .ndo_stop = dpa_eth_priv_stop,
+ .ndo_tx_timeout = dpa_timeout,
+ .ndo_get_stats64 = dpa_get_stats64,
+ .ndo_set_mac_address = dpa_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = dpa_change_mtu,
+ .ndo_set_rx_mode = dpa_set_rx_mode,
+ .ndo_init = dpa_ndo_init,
+ .ndo_set_features = dpa_set_features,
+ .ndo_fix_features = dpa_fix_features,
+};
+
+static int dpa_private_napi_add(struct net_device *net_dev)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ struct dpa_percpu_priv_s *percpu_priv;
+ int i, cpu;
+
+ for_each_possible_cpu(cpu) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+ percpu_priv->np = devm_kzalloc(net_dev->dev.parent,
+ qman_portal_max * sizeof(struct dpa_napi_portal),
+ GFP_KERNEL);
+
+ if (unlikely(!percpu_priv->np))
+ return -ENOMEM;
+
+ for (i = 0; i < qman_portal_max; i++)
+ netif_napi_add(net_dev, &percpu_priv->np[i].napi,
+ dpaa_eth_poll, DPA_NAPI_WEIGHT);
+ }
+
+ return 0;
+}
+
+void dpa_private_napi_del(struct net_device *net_dev)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ struct dpa_percpu_priv_s *percpu_priv;
+ int i, cpu;
+
+ for_each_possible_cpu(cpu) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
+
+ if (percpu_priv->np) {
+ for (i = 0; i < qman_portal_max; i++)
+ netif_napi_del(&percpu_priv->np[i].napi);
+
+ devm_kfree(net_dev->dev.parent, percpu_priv->np);
+ }
+ }
+}
+EXPORT_SYMBOL(dpa_private_napi_del);
+
+static int dpa_private_netdev_init(struct net_device *net_dev)
+{
+ int i;
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ struct dpa_percpu_priv_s *percpu_priv;
+ const u8 *mac_addr;
+
+ /* Although we access another CPU's private data here
+ * we do it at initialization so it is safe
+ */
+ for_each_possible_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+ percpu_priv->net_dev = net_dev;
+ }
+
+ net_dev->netdev_ops = &dpa_private_ops;
+ mac_addr = priv->mac_dev->addr;
+
+ net_dev->mem_start = priv->mac_dev->res->start;
+ net_dev->mem_end = priv->mac_dev->res->end;
+
+ net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+ NETIF_F_LLTX);
+
+ net_dev->features |= NETIF_F_GSO;
+
+ return dpa_netdev_init(net_dev, mac_addr, tx_timeout);
+}
+
+static struct dpa_bp * __cold
+dpa_priv_bp_probe(struct device *dev)
+{
+ struct dpa_bp *dpa_bp;
+
+ dpa_bp = devm_kzalloc(dev, sizeof(*dpa_bp), GFP_KERNEL);
+ if (unlikely(!dpa_bp))
+ return ERR_PTR(-ENOMEM);
+
+ dpa_bp->percpu_count = devm_alloc_percpu(dev, *dpa_bp->percpu_count);
+ dpa_bp->target_count = FSL_DPAA_ETH_MAX_BUF_COUNT;
+
+ dpa_bp->seed_cb = dpa_bp_priv_seed;
+ dpa_bp->free_buf_cb = _dpa_bp_free_pf;
+
+ return dpa_bp;
+}
+
+/* Place all ingress FQs (Rx Default, Rx Error) in a dedicated CGR.
+ * We won't be sending congestion notifications to FMan; for now, we just use
+ * this CGR to generate enqueue rejections to FMan in order to drop the frames
+ * before they reach our ingress queues and eat up memory.
+ */
+static int dpaa_eth_priv_ingress_cgr_init(struct dpa_priv_s *priv)
+{
+ struct qm_mcc_initcgr initcgr;
+ u32 cs_th;
+ int err;
+
+ err = qman_alloc_cgrid(&priv->ingress_cgr.cgrid);
+ if (err < 0) {
+ pr_err("Error %d allocating CGR ID\n", err);
+ goto out_error;
+ }
+
+ /* Enable CS TD, but disable Congestion State Change Notifications. */
+ initcgr.we_mask = QM_CGR_WE_CS_THRES;
+ initcgr.cgr.cscn_en = QM_CGR_EN;
+ cs_th = CONFIG_FSL_DPAA_INGRESS_CS_THRESHOLD;
+ qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);
+
+ initcgr.we_mask |= QM_CGR_WE_CSTD_EN;
+ initcgr.cgr.cstd_en = QM_CGR_EN;
+
+ /* This is actually a hack, because this CGR will be associated with
+ * our affine SWP. However, we'll place our ingress FQs in it.
+ */
+ err = qman_create_cgr(&priv->ingress_cgr, QMAN_CGR_FLAG_USE_INIT,
+ &initcgr);
+ if (err < 0) {
+ pr_err("Error %d creating ingress CGR with ID %d\n", err,
+ priv->ingress_cgr.cgrid);
+ qman_release_cgrid(priv->ingress_cgr.cgrid);
+ goto out_error;
+ }
+ pr_debug("Created ingress CGR %d for netdev with hwaddr %pM\n",
+ priv->ingress_cgr.cgrid, priv->mac_dev->addr);
+
+ /* struct qman_cgr allows special cgrid values (i.e. outside the 0..255
+ * range), but we have no common initialization path between the
+ * different variants of the DPAA Eth driver, so we do it here rather
+ * than modifying every other variant than "private Eth".
+ */
+ priv->use_ingress_cgr = true;
+
+out_error:
+ return err;
+}
+
+static int dpa_priv_bp_create(struct net_device *net_dev, struct dpa_bp *dpa_bp,
+ size_t count)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ int i;
+
+ netif_dbg(priv, probe, net_dev,
+ "Using private BM buffer pools\n");
+
+ priv->bp_count = count;
+
+ for (i = 0; i < count; i++) {
+ int err;
+
+ err = dpa_bp_alloc(&dpa_bp[i]);
+ if (err < 0) {
+ dpa_bp_free(priv);
+ priv->dpa_bp = NULL;
+ return err;
+ }
+
+ priv->dpa_bp = &dpa_bp[i];
+ }
+
+ dpa_priv_common_bpid = priv->dpa_bp->bpid;
+ return 0;
+}
+
+static const struct of_device_id dpa_match[];
+
+static int
+dpaa_eth_priv_probe(struct platform_device *pdev)
+{
+ int err = 0, i, channel;
+ struct device *dev;
+ struct dpa_bp *dpa_bp;
+ struct dpa_fq *dpa_fq, *tmp;
+ size_t count = 1;
+ struct net_device *net_dev = NULL;
+ struct dpa_priv_s *priv = NULL;
+ struct dpa_percpu_priv_s *percpu_priv;
+ struct fm_port_fqs port_fqs;
+ struct dpa_buffer_layout_s *buf_layout = NULL;
+ struct mac_device *mac_dev;
+ struct task_struct *kth;
+
+ dev = &pdev->dev;
+
+ /* Get the buffer pool assigned to this interface;
+ * run only once the default pool probing code
+ */
+ dpa_bp = (dpa_bpid2pool(dpa_priv_common_bpid)) ? :
+ dpa_priv_bp_probe(dev);
+ if (IS_ERR(dpa_bp))
+ return PTR_ERR(dpa_bp);
+
+ /* Allocate this early, so we can store relevant information in
+ * the private area
+ */
+ net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TX_QUEUES);
+ if (!net_dev) {
+ dev_err(dev, "alloc_etherdev_mq() failed\n");
+ goto alloc_etherdev_mq_failed;
+ }
+
+ snprintf(net_dev->name, IFNAMSIZ, "fm%d-mac%d",
+ dpa_mac_fman_index_get(pdev),
+ dpa_mac_hw_index_get(pdev));
+
+ /* Do this here, so we can be verbose early */
+ SET_NETDEV_DEV(net_dev, dev);
+ dev_set_drvdata(dev, net_dev);
+
+ priv = netdev_priv(net_dev);
+ priv->net_dev = net_dev;
+
+ priv->msg_enable = netif_msg_init(debug, -1);
+
+ mac_dev = dpa_mac_dev_get(pdev);
+ if (IS_ERR(mac_dev) || !mac_dev) {
+ err = PTR_ERR(mac_dev);
+ goto mac_probe_failed;
+ }
+
+ /* We have physical ports, so we need to establish
+ * the buffer layout.
+ */
+ buf_layout = devm_kzalloc(dev, 2 * sizeof(*buf_layout),
+ GFP_KERNEL);
+ if (!buf_layout)
+ goto alloc_failed;
+
+ dpa_set_buffers_layout(mac_dev, buf_layout);
+
+ /* For private ports, need to compute the size of the default
+ * buffer pool, based on FMan port buffer layout;also update
+ * the maximum buffer size for private ports if necessary
+ */
+ dpa_bp->size = dpa_bp_size(&buf_layout[RX]);
+
+ INIT_LIST_HEAD(&priv->dpa_fq_list);
+
+ memset(&port_fqs, 0, sizeof(port_fqs));
+
+ err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list, &port_fqs, true, RX);
+ if (!err)
+ err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list,
+ &port_fqs, true, TX);
+
+ if (err < 0)
+ goto fq_probe_failed;
+
+ /* bp init */
+
+ err = dpa_priv_bp_create(net_dev, dpa_bp, count);
+
+ if (err < 0)
+ goto bp_create_failed;
+
+ priv->mac_dev = mac_dev;
+
+ channel = dpa_get_channel();
+
+ if (channel < 0) {
+ err = channel;
+ goto get_channel_failed;
+ }
+
+ priv->channel = (u16)channel;
+
+ /* Start a thread that will walk the cpus with affine portals
+ * and add this pool channel to each's dequeue mask.
+ */
+ kth = kthread_run(dpaa_eth_add_channel,
+ (void *)(unsigned long)priv->channel,
+ "dpaa_%p:%d", net_dev, priv->channel);
+ if (!kth) {
+ err = -ENOMEM;
+ goto add_channel_failed;
+ }
+
+ dpa_fq_setup(priv, &private_fq_cbs, priv->mac_dev->port_dev[TX]);
+
+ /* Create a congestion group for this netdev, with
+ * dynamically-allocated CGR ID.
+ * Must be executed after probing the MAC, but before
+ * assigning the egress FQs to the CGRs.
+ */
+ err = dpaa_eth_cgr_init(priv);
+ if (err < 0) {
+ dev_err(dev, "Error initializing CGR\n");
+ goto tx_cgr_init_failed;
+ }
+ err = dpaa_eth_priv_ingress_cgr_init(priv);
+ if (err < 0) {
+ dev_err(dev, "Error initializing ingress CGR\n");
+ goto rx_cgr_init_failed;
+ }
+
+ /* Add the FQs to the interface, and make them active */
+ list_for_each_entry_safe(dpa_fq, tmp, &priv->dpa_fq_list, list) {
+ err = dpa_fq_init(dpa_fq, false);
+ if (err < 0)
+ goto fq_alloc_failed;
+ }
+
+ priv->buf_layout = buf_layout;
+ priv->tx_headroom = dpa_get_headroom(&priv->buf_layout[TX]);
+ priv->rx_headroom = dpa_get_headroom(&priv->buf_layout[RX]);
+
+ /* All real interfaces need their ports initialized */
+ dpaa_eth_init_ports(mac_dev, dpa_bp, count, &port_fqs,
+ buf_layout, dev);
+
+ priv->percpu_priv = devm_alloc_percpu(dev, *priv->percpu_priv);
+
+ if (!priv->percpu_priv) {
+ dev_err(dev, "devm_alloc_percpu() failed\n");
+ err = -ENOMEM;
+ goto alloc_percpu_failed;
+ }
+ for_each_possible_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+ memset(percpu_priv, 0, sizeof(*percpu_priv));
+ }
+
+ /* Initialize NAPI */
+ err = dpa_private_napi_add(net_dev);
+
+ if (err < 0)
+ goto napi_add_failed;
+
+ err = dpa_private_netdev_init(net_dev);
+
+ if (err < 0)
+ goto netdev_init_failed;
+
+ pr_info("Probed interface %s\n", net_dev->name);
+
+ return 0;
+
+netdev_init_failed:
+napi_add_failed:
+ dpa_private_napi_del(net_dev);
+alloc_percpu_failed:
+ dpa_fq_free(dev, &priv->dpa_fq_list);
+fq_alloc_failed:
+ qman_delete_cgr_safe(&priv->ingress_cgr);
+ qman_release_cgrid(priv->ingress_cgr.cgrid);
+rx_cgr_init_failed:
+ qman_delete_cgr_safe(&priv->cgr_data.cgr);
+ qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+tx_cgr_init_failed:
+add_channel_failed:
+get_channel_failed:
+ dpa_bp_free(priv);
+bp_create_failed:
+fq_probe_failed:
+alloc_failed:
+mac_probe_failed:
+ dev_set_drvdata(dev, NULL);
+ free_netdev(net_dev);
+alloc_etherdev_mq_failed:
+ if (atomic_read(&dpa_bp->refs) == 0)
+ devm_kfree(dev, dpa_bp);
+
+ return err;
+}
+
+static struct platform_device_id dpa_devtype[] = {
+ {
+ .name = "dpaa-ethernet",
+ .driver_data = 0,
+ }, {
+ }
+};
+MODULE_DEVICE_TABLE(platform, dpa_devtype);
+
+static struct platform_driver dpa_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ },
+ .id_table = dpa_devtype,
+ .probe = dpaa_eth_priv_probe,
+ .remove = dpa_remove
+};
+
+static int __init dpa_load(void)
+{
+ int err;
+
+ pr_info(DPA_DESCRIPTION "\n");
+
+ /* initialise dpaa_eth mirror values */
+ dpa_rx_extra_headroom = fm_get_rx_extra_headroom();
+ dpa_max_frm = fm_get_max_frm();
+
+ err = platform_driver_register(&dpa_driver);
+ if (unlikely(err < 0)) {
+ pr_err(KBUILD_MODNAME
+ ": %s:%hu:%s(): platform_driver_register() = %d\n",
+ KBUILD_BASENAME ".c", __LINE__, __func__, err);
+ }
+
+ pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
+ KBUILD_BASENAME ".c", __func__);
+
+ return err;
+}
+module_init(dpa_load);
+
+static void __exit dpa_unload(void)
+{
+ pr_debug(KBUILD_MODNAME ": -> %s:%s()\n",
+ KBUILD_BASENAME ".c", __func__);
+
+ platform_driver_unregister(&dpa_driver);
+
+ /* Only one channel is used and needs to be relased after all
+ * interfaces are removed
+ */
+ dpa_release_channel();
+
+ pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
+ KBUILD_BASENAME ".c", __func__);
+}
+module_exit(dpa_unload);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Andy Fleming <afleming@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION(DPA_DESCRIPTION);
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
new file mode 100644
index 0000000..3d286a1
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
@@ -0,0 +1,446 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DPA_H
+#define __DPA_H
+
+#include <linux/netdevice.h>
+#include <soc/fsl/qman.h>
+
+#include "fm_ext.h"
+#include "mac.h"
+
+extern int dpa_rx_extra_headroom;
+extern int dpa_max_frm;
+
+#define dpa_get_rx_extra_headroom() dpa_rx_extra_headroom
+#define dpa_get_max_frm() dpa_max_frm
+
+#define dpa_get_max_mtu() \
+ (dpa_get_max_frm() - (VLAN_ETH_HLEN + ETH_FCS_LEN))
+
+#define __hot
+
+/* Simple enum of FQ types - used for array indexing */
+enum port_type {RX, TX};
+
+struct dpa_buffer_layout_s {
+ u16 priv_data_size;
+ bool parse_results;
+ bool time_stamp;
+ bool hash_results;
+ u16 data_align;
+};
+
+#define DPA_ERR_ON(cond)
+
+#define DPA_TX_PRIV_DATA_SIZE 16
+#define DPA_PARSE_RESULTS_SIZE sizeof(fm_prs_result)
+#define DPA_TIME_STAMP_SIZE 8
+#define DPA_HASH_RESULTS_SIZE 8
+#define DPA_RX_PRIV_DATA_SIZE (DPA_TX_PRIV_DATA_SIZE + \
+ dpa_get_rx_extra_headroom())
+
+#define FM_FD_STAT_RX_ERRORS \
+ (FM_PORT_FRM_ERR_DMA | FM_PORT_FRM_ERR_PHYSICAL | \
+ FM_PORT_FRM_ERR_SIZE | FM_PORT_FRM_ERR_CLS_DISCARD | \
+ FM_PORT_FRM_ERR_EXTRACTION | FM_PORT_FRM_ERR_NO_SCHEME | \
+ FM_PORT_FRM_ERR_PRS_TIMEOUT | FM_PORT_FRM_ERR_PRS_ILL_INSTRUCT | \
+ FM_PORT_FRM_ERR_PRS_HDR_ERR)
+
+#define FM_FD_STAT_TX_ERRORS \
+ (FM_PORT_FRM_ERR_UNSUPPORTED_FORMAT | \
+ FM_PORT_FRM_ERR_LENGTH | FM_PORT_FRM_ERR_DMA)
+
+/* The raw buffer size must be cacheline aligned.
+ * Normally we use 2K buffers.
+ */
+#define DPA_BP_RAW_SIZE 2048
+
+/* This is what FMan is ever allowed to use.
+ * FMan-DMA requires 16-byte alignment for Rx buffers, but SKB_DATA_ALIGN is
+ * even stronger (SMP_CACHE_BYTES-aligned), so we just get away with that,
+ * via SKB_WITH_OVERHEAD(). We can't rely on netdev_alloc_frag() giving us
+ * half-page-aligned buffers (can we?), so we reserve some more space
+ * for start-of-buffer alignment.
+ */
+#define dpa_bp_size(buffer_layout) (SKB_WITH_OVERHEAD(DPA_BP_RAW_SIZE) - \
+ SMP_CACHE_BYTES)
+/* We must ensure that skb_shinfo is always cacheline-aligned. */
+#define DPA_SKB_SIZE(size) ((size) & ~(SMP_CACHE_BYTES - 1))
+
+/* Largest value that the FQD's OAL field can hold.
+ * This is DPAA-1.x specific.
+ */
+#define FSL_QMAN_MAX_OAL 127
+
+/* Default alignment for start of data in an Rx FD */
+#define DPA_FD_DATA_ALIGNMENT 16
+
+/* Values for the L3R field of the FM Parse Results
+ */
+/* L3 Type field: First IP Present IPv4 */
+#define FM_L3_PARSE_RESULT_IPV4 0x8000
+/* L3 Type field: First IP Present IPv6 */
+#define FM_L3_PARSE_RESULT_IPV6 0x4000
+
+/* Values for the L4R field of the FM Parse Results
+ * See $8.8.4.7.20 - L4 HXS - L4 Results from DPAA-Rev2 Reference Manual.
+ */
+/* L4 Type field: UDP */
+#define FM_L4_PARSE_RESULT_UDP 0x40
+/* L4 Type field: TCP */
+#define FM_L4_PARSE_RESULT_TCP 0x20
+
+#define FM_FD_STAT_ERR_PHYSICAL FM_PORT_FRM_ERR_PHYSICAL
+
+/* number of Tx queues to FMan */
+#define DPAA_ETH_TX_QUEUES NR_CPUS
+
+#define DPAA_ETH_RX_QUEUES 128
+
+#define FSL_DPAA_ETH_MAX_BUF_COUNT 128
+#define FSL_DPAA_ETH_REFILL_THRESHOLD 80
+
+/* More detailed FQ types - used for fine-grained WQ assignments */
+enum dpa_fq_type {
+ FQ_TYPE_RX_DEFAULT = 1, /* Rx Default FQs */
+ FQ_TYPE_RX_ERROR, /* Rx Error FQs */
+ FQ_TYPE_RX_PCD, /* User-defined PCDs */
+ FQ_TYPE_TX, /* "Real" Tx FQs */
+ FQ_TYPE_TX_CONFIRM, /* Tx default Conf FQ (actually an Rx FQ) */
+ FQ_TYPE_TX_CONF_MQ, /* Tx conf FQs (one for each Tx FQ) */
+ FQ_TYPE_TX_ERROR, /* Tx Error FQs (these are actually Rx FQs) */
+};
+
+struct dpa_fq {
+ struct qman_fq fq_base;
+ struct list_head list;
+ struct net_device *net_dev;
+ bool init;
+ u32 fqid;
+ u32 flags;
+ u16 channel;
+ u8 wq;
+ enum dpa_fq_type fq_type;
+};
+
+struct dpa_fq_cbs_t {
+ struct qman_fq rx_defq;
+ struct qman_fq tx_defq;
+ struct qman_fq rx_errq;
+ struct qman_fq tx_errq;
+ struct qman_fq egress_ern;
+};
+
+struct fqid_cell {
+ u32 start;
+ u32 count;
+};
+
+struct dpa_bp {
+ struct bman_pool *pool;
+ u8 bpid;
+ struct device *dev;
+ union {
+ /* The buffer pools used for the private ports are initialized
+ * with target_count buffers for each CPU; at runtime the
+ * number of buffers per CPU is constantly brought back to this
+ * level
+ */
+ int target_count;
+ /* The configured value for the number of buffers in the pool,
+ * used for shared port buffer pools
+ */
+ int config_count;
+ };
+ size_t size;
+ bool seed_pool;
+ /* physical address of the contiguous memory used by the pool to store
+ * the buffers
+ */
+ dma_addr_t paddr;
+ /* virtual address of the contiguous memory used by the pool to store
+ * the buffers
+ */
+ void __iomem *vaddr;
+ /* current number of buffers in the bpool alloted to this CPU */
+ int __percpu *percpu_count;
+ atomic_t refs;
+ /* some bpools need to be seeded before use by this cb */
+ int (*seed_cb)(struct dpa_bp *);
+ /* some bpools need to be emptied before freeing; this cb is used
+ * for freeing of individual buffers taken from the pool
+ */
+ void (*free_buf_cb)(void *addr);
+};
+
+struct dpa_napi_portal {
+ struct napi_struct napi;
+ struct qman_portal *p;
+};
+
+struct dpa_percpu_priv_s {
+ struct net_device *net_dev;
+ struct dpa_napi_portal *np;
+ struct rtnl_link_stats64 stats;
+};
+
+struct dpa_priv_s {
+ struct dpa_percpu_priv_s __percpu *percpu_priv;
+ struct dpa_bp *dpa_bp;
+ /* Store here the needed Tx headroom for convenience and speed
+ * (even though it can be computed based on the fields of buf_layout)
+ */
+ u16 tx_headroom;
+ struct net_device *net_dev;
+ struct mac_device *mac_dev;
+ struct qman_fq *egress_fqs[DPAA_ETH_TX_QUEUES];
+ struct qman_fq *conf_fqs[DPAA_ETH_TX_QUEUES];
+
+ size_t bp_count;
+
+ u16 channel; /* "fsl,qman-channel-id" */
+ struct list_head dpa_fq_list;
+
+ u32 msg_enable; /* net_device message level */
+
+ struct {
+ /**
+ * All egress queues to a given net device belong to one
+ * (and the same) congestion group.
+ */
+ struct qman_cgr cgr;
+ } cgr_data;
+ /* Use a per-port CGR for ingress traffic. */
+ bool use_ingress_cgr;
+ struct qman_cgr ingress_cgr;
+
+ struct dpa_buffer_layout_s *buf_layout;
+ u16 rx_headroom;
+};
+
+struct fm_port_fqs {
+ struct dpa_fq *tx_defq;
+ struct dpa_fq *tx_errq;
+ struct dpa_fq *rx_defq;
+ struct dpa_fq *rx_errq;
+};
+
+int dpa_bp_priv_seed(struct dpa_bp *dpa_bp);
+int dpaa_eth_refill_bpools(struct dpa_bp *dpa_bp, int *count_ptr);
+void __hot _dpa_rx(struct net_device *net_dev,
+ struct qman_portal *portal,
+ const struct dpa_priv_s *priv,
+ struct dpa_percpu_priv_s *percpu_priv,
+ const struct qm_fd *fd,
+ u32 fqid,
+ int *count_ptr);
+int __hot dpa_tx(struct sk_buff *skb, struct net_device *net_dev);
+struct sk_buff *_dpa_cleanup_tx_fd(const struct dpa_priv_s *priv,
+ const struct qm_fd *fd);
+
+/* Turn on HW checksum computation for this outgoing frame.
+ * If the current protocol is not something we support in this regard
+ * (or if the stack has already computed the SW checksum), we do nothing.
+ *
+ * Returns 0 if all goes well (or HW csum doesn't apply), and a negative value
+ * otherwise.
+ *
+ * Note that this function may modify the fd->cmd field and the skb data buffer
+ * (the Parse Results area).
+ */
+int dpa_enable_tx_csum(struct dpa_priv_s *priv, struct sk_buff *skb,
+ struct qm_fd *fd, char *parse_results);
+
+static inline int dpaa_eth_napi_schedule(struct dpa_percpu_priv_s *percpu_priv,
+ struct qman_portal *portal)
+{
+ /* In case of threaded ISR for RT enable kernel,
+ * in_irq() does not return appropriate value, so use
+ * in_serving_softirq to distinguish softirq or irq context.
+ */
+ if (unlikely(in_irq() || !in_serving_softirq())) {
+ /* Disable QMan IRQ and invoke NAPI */
+ int ret = qman_p_irqsource_remove(portal, QM_PIRQ_DQRI);
+
+ if (likely(!ret)) {
+ const struct qman_portal_config *pc =
+ qman_p_get_portal_config(portal);
+ struct dpa_napi_portal *np =
+ &percpu_priv->np[pc->channel];
+
+ np->p = portal;
+ napi_schedule(&np->napi);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static inline ssize_t __const __must_check __attribute__((nonnull))
+dpa_fd_length(const struct qm_fd *fd)
+{
+ return fd->length20;
+}
+
+static inline ssize_t __const __must_check __attribute__((nonnull))
+dpa_fd_offset(const struct qm_fd *fd)
+{
+ return fd->offset;
+}
+
+/* Verifies if the skb length is below the interface MTU */
+static inline int dpa_check_rx_mtu(struct sk_buff *skb, int mtu)
+{
+ if (unlikely(skb->len > mtu))
+ if ((skb->protocol != ETH_P_8021Q) || (skb->len > mtu + 4))
+ return -1;
+
+ return 0;
+}
+
+static inline u16 dpa_get_headroom(struct dpa_buffer_layout_s *bl)
+{
+ u16 headroom;
+ /* The frame headroom must accommodate:
+ * - the driver private data area
+ * - parse results, hash results, timestamp if selected
+ * If either hash results or time stamp are selected, both will
+ * be copied to/from the frame headroom, as TS is located between PR and
+ * HR in the IC and IC copy size has a granularity of 16bytes
+ * (see description of FMBM_RICP and FMBM_TICP registers in DPAARM)
+ *
+ * Also make sure the headroom is a multiple of data_align bytes
+ */
+ headroom = (u16)(bl->priv_data_size +
+ (bl->parse_results ? DPA_PARSE_RESULTS_SIZE : 0) +
+ (bl->hash_results || bl->time_stamp ?
+ DPA_TIME_STAMP_SIZE + DPA_HASH_RESULTS_SIZE : 0));
+
+ return bl->data_align ? ALIGN(headroom, bl->data_align) : headroom;
+}
+
+void dpa_private_napi_del(struct net_device *net_dev);
+
+static inline void clear_fd(struct qm_fd *fd)
+{
+ fd->opaque_addr = 0;
+ fd->opaque = 0;
+ fd->cmd = 0;
+}
+
+static inline struct qman_fq *_dpa_get_tx_conf_queue(
+ const struct dpa_priv_s *priv,
+ struct qman_fq *tx_fq)
+{
+ int i;
+
+ for (i = 0; i < DPAA_ETH_TX_QUEUES; i++)
+ if (priv->egress_fqs[i] == tx_fq)
+ return priv->conf_fqs[i];
+
+ return NULL;
+}
+
+static inline int __hot dpa_xmit(struct dpa_priv_s *priv,
+ struct rtnl_link_stats64 *percpu_stats,
+ int queue,
+ struct qm_fd *fd)
+{
+ int err, i;
+ struct qman_fq *egress_fq;
+
+ egress_fq = priv->egress_fqs[queue];
+ if (fd->bpid == 0xff)
+ fd->cmd |= qman_fq_fqid(
+ _dpa_get_tx_conf_queue(priv, egress_fq)
+ );
+
+ for (i = 0; i < 100000; i++) {
+ err = qman_enqueue(egress_fq, fd, 0);
+ if (err != -EBUSY)
+ break;
+ }
+
+ if (unlikely(err < 0)) {
+ percpu_stats->tx_errors++;
+ percpu_stats->tx_fifo_errors++;
+ return err;
+ }
+
+ percpu_stats->tx_packets++;
+ percpu_stats->tx_bytes += dpa_fd_length(fd);
+
+ return 0;
+}
+
+/* Use multiple WQs for FQ assignment:
+ * - Tx Confirmation queues go to WQ1.
+ * - Rx Default and Tx queues go to WQ3 (no differentiation between
+ * Rx and Tx traffic).
+ * - Rx Error and Tx Error queues go to WQ2 (giving them a better chance
+ * to be scheduled, in case there are many more FQs in WQ3).
+ * This ensures that Tx-confirmed buffers are timely released. In particular,
+ * it avoids congestion on the Tx Confirm FQs, which can pile up PFDRs if they
+ * are greatly outnumbered by other FQs in the system, while
+ * dequeue scheduling is round-robin.
+ */
+static inline void _dpa_assign_wq(struct dpa_fq *fq)
+{
+ switch (fq->fq_type) {
+ case FQ_TYPE_TX_CONFIRM:
+ case FQ_TYPE_TX_CONF_MQ:
+ fq->wq = 1;
+ break;
+ case FQ_TYPE_RX_DEFAULT:
+ case FQ_TYPE_TX:
+ fq->wq = 3;
+ break;
+ case FQ_TYPE_RX_ERROR:
+ case FQ_TYPE_TX_ERROR:
+ fq->wq = 2;
+ break;
+ default:
+ WARN(1, "Invalid FQ type %d for FQID %d!\n",
+ fq->fq_type, fq->fqid);
+ }
+}
+
+/* Use the queue selected by XPS */
+#define dpa_get_queue_mapping(skb) \
+ skb_get_queue_mapping(skb)
+
+static inline void _dpa_bp_free_pf(void *addr)
+{
+ put_page(virt_to_head_page(addr));
+}
+
+#endif /* __DPA_H */
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
new file mode 100644
index 0000000..d04bda5
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
@@ -0,0 +1,1280 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/etherdevice.h>
+#include <linux/kthread.h>
+#include <linux/percpu.h>
+#include <linux/highmem.h>
+#include <linux/sort.h>
+#include <soc/fsl/qman.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_vlan.h>
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+#include "mac.h"
+
+/* Size in bytes of the FQ taildrop threshold */
+#define DPA_FQ_TD 0x200000
+
+static struct dpa_bp *dpa_bp_array[64];
+
+int dpa_max_frm;
+EXPORT_SYMBOL(dpa_max_frm);
+
+int dpa_rx_extra_headroom;
+EXPORT_SYMBOL(dpa_rx_extra_headroom);
+
+static const struct fqid_cell tx_confirm_fqids[] = {
+ {0, DPAA_ETH_TX_QUEUES}
+};
+
+static const struct fqid_cell default_fqids[][3] = {
+ [RX] = { {0, 1}, {0, 1}, {0, DPAA_ETH_RX_QUEUES} },
+ [TX] = { {0, 1}, {0, 1}, {0, DPAA_ETH_TX_QUEUES} }
+};
+
+int dpa_netdev_init(struct net_device *net_dev,
+ const u8 *mac_addr,
+ u16 tx_timeout)
+{
+ int err;
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ struct device *dev = net_dev->dev.parent;
+
+ net_dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+
+ net_dev->features |= net_dev->hw_features;
+ net_dev->vlan_features = net_dev->features;
+
+ memcpy(net_dev->perm_addr, mac_addr, net_dev->addr_len);
+ memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len);
+
+ net_dev->needed_headroom = priv->tx_headroom;
+ net_dev->watchdog_timeo = msecs_to_jiffies(tx_timeout);
+
+ err = register_netdev(net_dev);
+ if (err < 0) {
+ dev_err(dev, "register_netdev() = %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dpa_netdev_init);
+
+int dpa_start(struct net_device *net_dev)
+{
+ int err, i;
+ struct dpa_priv_s *priv;
+ struct mac_device *mac_dev;
+
+ priv = netdev_priv(net_dev);
+ mac_dev = priv->mac_dev;
+
+ err = mac_dev->init_phy(net_dev, priv->mac_dev);
+ if (err < 0) {
+ netif_err(priv, ifup, net_dev, "init_phy() = %d\n", err);
+ return err;
+ }
+
+ for_each_port_device(i, mac_dev->port_dev) {
+ err = fm_port_enable(mac_dev->port_dev[i]);
+ if (err)
+ goto mac_start_failed;
+ }
+
+ err = priv->mac_dev->start(mac_dev);
+ if (err < 0) {
+ netif_err(priv, ifup, net_dev, "mac_dev->start() = %d\n", err);
+ goto mac_start_failed;
+ }
+
+ netif_tx_start_all_queues(net_dev);
+
+ return 0;
+
+mac_start_failed:
+ for_each_port_device(i, mac_dev->port_dev)
+ fm_port_disable(mac_dev->port_dev[i]);
+
+ return err;
+}
+EXPORT_SYMBOL(dpa_start);
+
+int dpa_stop(struct net_device *net_dev)
+{
+ int i, err, error;
+ struct dpa_priv_s *priv;
+ struct mac_device *mac_dev;
+
+ priv = netdev_priv(net_dev);
+ mac_dev = priv->mac_dev;
+
+ netif_tx_stop_all_queues(net_dev);
+ /* Allow the Fman (Tx) port to process in-flight frames before we
+ * try switching it off.
+ */
+ usleep_range(5000, 10000);
+
+ err = mac_dev->stop(mac_dev);
+ if (unlikely(err < 0))
+ netif_err(priv, ifdown, net_dev, "mac_dev->stop() = %d\n",
+ err);
+
+ for_each_port_device(i, mac_dev->port_dev) {
+ error = fm_port_disable(mac_dev->port_dev[i]);
+ err = error ? error : err;
+ }
+
+ if (mac_dev->phy_dev)
+ phy_disconnect(mac_dev->phy_dev);
+ mac_dev->phy_dev = NULL;
+
+ return err;
+}
+EXPORT_SYMBOL(dpa_stop);
+
+void dpa_timeout(struct net_device *net_dev)
+{
+ const struct dpa_priv_s *priv;
+ struct dpa_percpu_priv_s *percpu_priv;
+
+ priv = netdev_priv(net_dev);
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+
+ netif_crit(priv, timer, net_dev, "Transmit timeout latency: %u ms\n",
+ jiffies_to_msecs(jiffies - net_dev->trans_start));
+
+ percpu_priv->stats.tx_errors++;
+}
+EXPORT_SYMBOL(dpa_timeout);
+
+/* net_device */
+
+/**
+ * @param net_dev the device for which statistics are calculated
+ * @param stats the function fills this structure with the device's statistics
+ * @return the address of the structure containing the statistics
+ *
+ * Calculates the statistics for the given device by adding the statistics
+ * collected by each CPU.
+ */
+struct rtnl_link_stats64 * __cold
+dpa_get_stats64(struct net_device *net_dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct dpa_priv_s *priv = netdev_priv(net_dev);
+ u64 *cpustats;
+ u64 *netstats = (u64 *)stats;
+ int i, j;
+ struct dpa_percpu_priv_s *percpu_priv;
+ int numstats = sizeof(struct rtnl_link_stats64) / sizeof(u64);
+
+ for_each_possible_cpu(i) {
+ percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
+
+ cpustats = (u64 *)&percpu_priv->stats;
+
+ for (j = 0; j < numstats; j++)
+ netstats[j] += cpustats[j];
+ }
+
+ return stats;
+}
+EXPORT_SYMBOL(dpa_get_stats64);
+
+int dpa_change_mtu(struct net_device *net_dev, int new_mtu)
+{
+ const int max_mtu = dpa_get_max_mtu();
+
+ /* Make sure we don't exceed the Ethernet controller's MAXFRM */
+ if (new_mtu < 68 || new_mtu > max_mtu) {
+ netdev_err(net_dev, "Invalid L3 mtu %d (must be between %d and %d).\n",
+ new_mtu, 68, max_mtu);
+ return -EINVAL;
+ }
+ net_dev->mtu = new_mtu;
+
+ return 0;
+}
+EXPORT_SYMBOL(dpa_change_mtu);
+
+/* .ndo_init callback */
+int dpa_ndo_init(struct net_device *net_dev)
+{
+ /* If fsl_fm_max_frm is set to a higher value than the all-common 1500,
+ * we choose conservatively and let the user explicitly set a higher
+ * MTU via ifconfig. Otherwise, the user may end up with different MTUs
+ * in the same LAN.
+ * If on the other hand fsl_fm_max_frm has been chosen below 1500,
+ * start with the maximum allowed.
+ */
+ int init_mtu = min(dpa_get_max_mtu(), ETH_DATA_LEN);
+
+ pr_debug("Setting initial MTU on net device: %d\n", init_mtu);
+ net_dev->mtu = init_mtu;
+
+ return 0;
+}
+EXPORT_SYMBOL(dpa_ndo_init);
+
+int dpa_set_features(struct net_device *dev, netdev_features_t features)
+{
+ /* Not much to do here for now */
+ dev->features = features;
+ return 0;
+}
+EXPORT_SYMBOL(dpa_set_features);
+
+netdev_features_t dpa_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ netdev_features_t unsupported_features = 0;
+
+ /* In theory we should never be requested to enable features that
+ * we didn't set in netdev->features and netdev->hw_features at probe
+ * time, but double check just to be on the safe side.
+ * We don't support enabling Rx csum through ethtool yet
+ */
+ unsupported_features |= NETIF_F_RXCSUM;
+
+ features &= ~unsupported_features;
+
+ return features;
+}
+EXPORT_SYMBOL(dpa_fix_features);
+
+int dpa_remove(struct platform_device *pdev)
+{
+ int err;
+ struct device *dev;
+ struct net_device *net_dev;
+ struct dpa_priv_s *priv;
+
+ dev = &pdev->dev;
+ net_dev = dev_get_drvdata(dev);
+
+ priv = netdev_priv(net_dev);
+
+ dev_set_drvdata(dev, NULL);
+ unregister_netdev(net_dev);
+
+ err = dpa_fq_free(dev, &priv->dpa_fq_list);
+
+ qman_delete_cgr_safe(&priv->ingress_cgr);
+ qman_release_cgrid(priv->ingress_cgr.cgrid);
+ qman_delete_cgr_safe(&priv->cgr_data.cgr);
+ qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+
+ dpa_private_napi_del(net_dev);
+
+ dpa_bp_free(priv);
+
+ if (priv->buf_layout)
+ devm_kfree(dev, priv->buf_layout);
+
+ free_netdev(net_dev);
+
+ return err;
+}
+EXPORT_SYMBOL(dpa_remove);
+
+struct mac_device * __must_check
+__attribute__((nonnull))
+dpa_mac_dev_get(struct platform_device *pdev)
+{
+ struct device *dpa_dev, *dev;
+ struct device_node *mac_node;
+ struct platform_device *of_dev;
+ struct mac_device *mac_dev;
+ struct dpaa_eth_data *eth_data;
+
+ dpa_dev = &pdev->dev;
+ eth_data = dpa_dev->platform_data;
+ if (!eth_data)
+ return ERR_PTR(-ENODEV);
+
+ mac_node = eth_data->mac_node;
+
+ of_dev = of_find_device_by_node(mac_node);
+ if (unlikely(!of_dev)) {
+ dev_err(dpa_dev, "of_find_device_by_node(%s) failed\n",
+ mac_node->full_name);
+ of_node_put(mac_node);
+ return ERR_PTR(-EINVAL);
+ }
+ of_node_put(mac_node);
+
+ dev = &of_dev->dev;
+
+ mac_dev = dev_get_drvdata(dev);
+ if (unlikely(!mac_dev)) {
+ dev_err(dpa_dev, "dev_get_drvdata(%s) failed\n",
+ dev_name(dev));
+ return ERR_PTR(-EINVAL);
+ }
+
+ return mac_dev;
+}
+EXPORT_SYMBOL(dpa_mac_dev_get);
+
+int dpa_mac_hw_index_get(struct platform_device *pdev)
+{
+ struct device *dpa_dev;
+ struct dpaa_eth_data *eth_data;
+
+ dpa_dev = &pdev->dev;
+ eth_data = dpa_dev->platform_data;
+
+ return eth_data->mac_hw_id;
+}
+
+int dpa_mac_fman_index_get(struct platform_device *pdev)
+{
+ struct device *dpa_dev;
+ struct dpaa_eth_data *eth_data;
+
+ dpa_dev = &pdev->dev;
+ eth_data = dpa_dev->platform_data;
+
+ return eth_data->fman_hw_id;
+}
+
+int dpa_set_mac_address(struct net_device *net_dev, void *addr)
+{
+ const struct dpa_priv_s *priv;
+ int err;
+ struct mac_device *mac_dev;
+
+ priv = netdev_priv(net_dev);
+
+ err = eth_mac_addr(net_dev, addr);
+ if (err < 0) {
+ netif_err(priv, drv, net_dev, "eth_mac_addr() = %d\n", err);
+ return err;
+ }
+
+ mac_dev = priv->mac_dev;
+
+ err = mac_dev->change_addr(mac_dev->get_mac_handle(mac_dev),
+ (enet_addr_t *)net_dev->dev_addr);
+ if (err < 0) {
+ netif_err(priv, drv, net_dev, "mac_dev->change_addr() = %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dpa_set_mac_address);
+
+void dpa_set_rx_mode(struct net_device *net_dev)
+{
+ int err;
+ const struct dpa_priv_s *priv;
+
+ priv = netdev_priv(net_dev);
+
+ if (!!(net_dev->flags & IFF_PROMISC) != priv->mac_dev->promisc) {
+ priv->mac_dev->promisc = !priv->mac_dev->promisc;
+ err = priv->mac_dev->set_promisc(
+ priv->mac_dev->get_mac_handle(priv->mac_dev),
+ priv->mac_dev->promisc);
+ if (unlikely(err < 0))
+ netif_err(priv, drv, net_dev,
+ "mac_dev->set_promisc() = %d\n",
+ err);
+ }
+
+ err = priv->mac_dev->set_multi(net_dev, priv->mac_dev);
+ if (unlikely(err < 0))
+ netif_err(priv, drv, net_dev, "mac_dev->set_multi() = %d\n",
+ err);
+}
+EXPORT_SYMBOL(dpa_set_rx_mode);
+
+void dpa_set_buffers_layout(struct mac_device *mac_dev,
+ struct dpa_buffer_layout_s *layout)
+{
+ struct fm_port_params params;
+
+ /* Rx */
+ layout[RX].priv_data_size = (u16)DPA_RX_PRIV_DATA_SIZE;
+ layout[RX].parse_results = true;
+ layout[RX].hash_results = true;
+
+ fm_port_get_buff_layout_ext_params(mac_dev->port_dev[RX], &params);
+ /* a value of zero for data alignment means "don't care", so align to
+ * a non-zero value to prevent FMD from using its own default
+ */
+ layout[RX].data_align = params.data_align ? : DPA_FD_DATA_ALIGNMENT;
+
+ /* Tx */
+ layout[TX].priv_data_size = DPA_TX_PRIV_DATA_SIZE;
+ layout[TX].parse_results = true;
+ layout[TX].hash_results = true;
+
+ fm_port_get_buff_layout_ext_params(mac_dev->port_dev[TX], &params);
+ layout[TX].data_align = params.data_align ? : DPA_FD_DATA_ALIGNMENT;
+}
+EXPORT_SYMBOL(dpa_set_buffers_layout);
+
+int __attribute__((nonnull))
+dpa_bp_alloc(struct dpa_bp *dpa_bp)
+{
+ int err;
+ struct bman_pool_params bp_params;
+ struct platform_device *pdev;
+
+ if (dpa_bp->size == 0 || dpa_bp->config_count == 0) {
+ pr_err("Buffer pool is not properly initialized! Missing size or initial number of buffers");
+ return -EINVAL;
+ }
+
+ memset(&bp_params, 0, sizeof(struct bman_pool_params));
+
+ /* If the pool is already specified, we only create one per bpid */
+ if (dpa_bpid2pool_use(dpa_bp->bpid))
+ return 0;
+
+ if (dpa_bp->bpid == 0)
+ bp_params.flags |= BMAN_POOL_FLAG_DYNAMIC_BPID;
+ else
+ bp_params.bpid = dpa_bp->bpid;
+
+ dpa_bp->pool = bman_new_pool(&bp_params);
+ if (unlikely(!dpa_bp->pool)) {
+ pr_err("bman_new_pool() failed\n");
+ return -ENODEV;
+ }
+
+ dpa_bp->bpid = (u8)bman_get_params(dpa_bp->pool)->bpid;
+
+ pdev = platform_device_register_simple("DPAA_bpool",
+ dpa_bp->bpid, NULL, 0);
+ if (IS_ERR(pdev)) {
+ err = PTR_ERR(pdev);
+ goto pdev_register_failed;
+ }
+
+ err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
+ if (err)
+ goto pdev_mask_failed;
+
+ dpa_bp->dev = &pdev->dev;
+
+ if (dpa_bp->seed_cb) {
+ err = dpa_bp->seed_cb(dpa_bp);
+ if (err)
+ goto pool_seed_failed;
+ }
+
+ dpa_bpid2pool_map(dpa_bp->bpid, dpa_bp);
+
+ return 0;
+
+pool_seed_failed:
+pdev_mask_failed:
+ platform_device_unregister(pdev);
+pdev_register_failed:
+ bman_free_pool(dpa_bp->pool);
+
+ return err;
+}
+EXPORT_SYMBOL(dpa_bp_alloc);
+
+void dpa_bp_drain(struct dpa_bp *bp)
+{
+ int ret;
+ u8 num = 8;
+
+ do {
+ struct bm_buffer bmb[8];
+ int i;
+
+ ret = bman_acquire(bp->pool, bmb, num, 0);
+ if (ret < 0) {
+ if (num == 8) {
+ /* we have less than 8 buffers left;
+ * drain them one by one
+ */
+ num = 1;
+ ret = 1;
+ continue;
+ } else {
+ /* Pool is fully drained */
+ break;
+ }
+ }
+
+ for (i = 0; i < num; i++) {
+ dma_addr_t addr = bm_buf_addr(&bmb[i]);
+
+ dma_unmap_single(bp->dev, addr, bp->size,
+ DMA_BIDIRECTIONAL);
+
+ bp->free_buf_cb(phys_to_virt(addr));
+ }
+ } while (ret > 0);
+}
+
+static void __attribute__((nonnull))
+_dpa_bp_free(struct dpa_bp *dpa_bp)
+{
+ struct dpa_bp *bp = dpa_bpid2pool(dpa_bp->bpid);
+
+ /* the mapping between bpid and dpa_bp is done very late in the
+ * allocation procedure; if something failed before the mapping, the bp
+ * was not configured, therefore we don't need the below instructions
+ */
+ if (!bp)
+ return;
+
+ if (!atomic_dec_and_test(&bp->refs))
+ return;
+
+ if (bp->free_buf_cb)
+ dpa_bp_drain(bp);
+
+ dpa_bp_array[bp->bpid] = NULL;
+ bman_free_pool(bp->pool);
+
+ if (bp->dev)
+ platform_device_unregister(to_platform_device(bp->dev));
+}
+
+void __attribute__((nonnull))
+dpa_bp_free(struct dpa_priv_s *priv)
+{
+ int i;
+
+ for (i = 0; i < priv->bp_count; i++)
+ _dpa_bp_free(&priv->dpa_bp[i]);
+}
+EXPORT_SYMBOL(dpa_bp_free);
+
+struct dpa_bp *dpa_bpid2pool(int bpid)
+{
+ return dpa_bp_array[bpid];
+}
+EXPORT_SYMBOL(dpa_bpid2pool);
+
+void dpa_bpid2pool_map(int bpid, struct dpa_bp *dpa_bp)
+{
+ dpa_bp_array[bpid] = dpa_bp;
+ atomic_set(&dpa_bp->refs, 1);
+}
+
+bool dpa_bpid2pool_use(int bpid)
+{
+ if (dpa_bpid2pool(bpid)) {
+ atomic_inc(&dpa_bp_array[bpid]->refs);
+ return true;
+ }
+
+ return false;
+}
+
+struct dpa_fq *dpa_fq_alloc(struct device *dev,
+ const struct fqid_cell *fqids,
+ struct list_head *list,
+ enum dpa_fq_type fq_type)
+{
+ int i;
+ struct dpa_fq *dpa_fq;
+
+ dpa_fq = devm_kzalloc(dev, sizeof(*dpa_fq) * fqids->count, GFP_KERNEL);
+ if (!dpa_fq)
+ return NULL;
+
+ for (i = 0; i < fqids->count; i++) {
+ dpa_fq[i].fq_type = fq_type;
+ dpa_fq[i].fqid = fqids->start ? fqids->start + i : 0;
+ list_add_tail(&dpa_fq[i].list, list);
+ }
+
+ for (i = 0; i < fqids->count; i++)
+ _dpa_assign_wq(dpa_fq + i);
+
+ return dpa_fq;
+}
+EXPORT_SYMBOL(dpa_fq_alloc);
+
+int dpa_fq_probe_mac(struct device *dev, struct list_head *list,
+ struct fm_port_fqs *port_fqs,
+ bool alloc_tx_conf_fqs,
+ enum port_type ptype)
+{
+ const struct fqid_cell *fqids;
+ struct dpa_fq *dpa_fq;
+ int num_ranges;
+ int i;
+
+ if (ptype == TX && alloc_tx_conf_fqs) {
+ if (!dpa_fq_alloc(dev, tx_confirm_fqids, list,
+ FQ_TYPE_TX_CONF_MQ))
+ goto fq_alloc_failed;
+ }
+
+ fqids = default_fqids[ptype];
+ num_ranges = 3;
+
+ for (i = 0; i < num_ranges; i++) {
+ switch (i) {
+ case 0:
+ /* The first queue is the error queue */
+ if (fqids[i].count != 1)
+ goto invalid_error_queue;
+
+ dpa_fq = dpa_fq_alloc(dev, &fqids[i], list,
+ ptype == RX ?
+ FQ_TYPE_RX_ERROR :
+ FQ_TYPE_TX_ERROR);
+ if (!dpa_fq)
+ goto fq_alloc_failed;
+
+ if (ptype == RX)
+ port_fqs->rx_errq = &dpa_fq[0];
+ else
+ port_fqs->tx_errq = &dpa_fq[0];
+ break;
+ case 1:
+ /* the second queue is the default queue */
+ if (fqids[i].count != 1)
+ goto invalid_default_queue;
+
+ dpa_fq = dpa_fq_alloc(dev, &fqids[i], list,
+ ptype == RX ?
+ FQ_TYPE_RX_DEFAULT :
+ FQ_TYPE_TX_CONFIRM);
+ if (!dpa_fq)
+ goto fq_alloc_failed;
+
+ if (ptype == RX)
+ port_fqs->rx_defq = &dpa_fq[0];
+ else
+ port_fqs->tx_defq = &dpa_fq[0];
+ break;
+ default:
+ /* all subsequent queues are Tx */
+ if (!dpa_fq_alloc(dev, &fqids[i], list, FQ_TYPE_TX))
+ goto fq_alloc_failed;
+ break;
+ }
+ }
+
+ return 0;
+
+fq_alloc_failed:
+ dev_err(dev, "dpa_fq_alloc() failed\n");
+ return -ENOMEM;
+
+invalid_default_queue:
+invalid_error_queue:
+ dev_err(dev, "Too many default or error queues\n");
+ return -EINVAL;
+}
+EXPORT_SYMBOL(dpa_fq_probe_mac);
+
+static u32 rx_pool_channel;
+static DEFINE_SPINLOCK(rx_pool_channel_init);
+
+int dpa_get_channel(void)
+{
+ spin_lock(&rx_pool_channel_init);
+ if (!rx_pool_channel) {
+ u32 pool;
+ int ret = qman_alloc_pool(&pool);
+
+ if (!ret)
+ rx_pool_channel = pool;
+ }
+ spin_unlock(&rx_pool_channel_init);
+ if (!rx_pool_channel)
+ return -ENOMEM;
+ return rx_pool_channel;
+}
+EXPORT_SYMBOL(dpa_get_channel);
+
+void dpa_release_channel(void)
+{
+ qman_release_pool(rx_pool_channel);
+}
+EXPORT_SYMBOL(dpa_release_channel);
+
+int dpaa_eth_add_channel(void *__arg)
+{
+ const cpumask_t *cpus = qman_affine_cpus();
+ u32 pool = QM_SDQCR_CHANNELS_POOL_CONV((u16)(unsigned long)__arg);
+ int cpu;
+ struct qman_portal *portal;
+
+ for_each_cpu(cpu, cpus) {
+ portal = (struct qman_portal *)qman_get_affine_portal(cpu);
+ qman_p_static_dequeue_add(portal, pool);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(dpaa_eth_add_channel);
+
+/**
+ * Congestion group state change notification callback.
+ * Stops the device's egress queues while they are congested and
+ * wakes them upon exiting congested state.
+ * Also updates some CGR-related stats.
+ */
+static void dpaa_eth_cgscn(struct qman_portal *qm, struct qman_cgr *cgr,
+ int congested)
+{
+ struct dpa_priv_s *priv = (struct dpa_priv_s *)container_of(cgr,
+ struct dpa_priv_s, cgr_data.cgr);
+
+ if (congested)
+ netif_tx_stop_all_queues(priv->net_dev);
+ else
+ netif_tx_wake_all_queues(priv->net_dev);
+}
+
+int dpaa_eth_cgr_init(struct dpa_priv_s *priv)
+{
+ struct qm_mcc_initcgr initcgr;
+ u32 cs_th;
+ int err;
+
+ err = qman_alloc_cgrid(&priv->cgr_data.cgr.cgrid);
+ if (err < 0) {
+ pr_err("Error %d allocating CGR ID\n", err);
+ goto out_error;
+ }
+ priv->cgr_data.cgr.cb = dpaa_eth_cgscn;
+
+ /* Enable Congestion State Change Notifications and CS taildrop */
+ initcgr.we_mask = QM_CGR_WE_CSCN_EN | QM_CGR_WE_CS_THRES;
+ initcgr.cgr.cscn_en = QM_CGR_EN;
+
+ /* Set different thresholds based on the MAC speed.
+ * This may turn suboptimal if the MAC is reconfigured at a speed
+ * lower than its max, e.g. if a dTSEC later negotiates a 100Mbps link.
+ * In such cases, we ought to reconfigure the threshold, too.
+ */
+ if (priv->mac_dev->if_support & SUPPORTED_10000baseT_Full)
+ cs_th = CONFIG_FSL_DPAA_CS_THRESHOLD_10G;
+ else
+ cs_th = CONFIG_FSL_DPAA_CS_THRESHOLD_1G;
+ qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);
+
+ initcgr.we_mask |= QM_CGR_WE_CSTD_EN;
+ initcgr.cgr.cstd_en = QM_CGR_EN;
+
+ err = qman_create_cgr(&priv->cgr_data.cgr, QMAN_CGR_FLAG_USE_INIT,
+ &initcgr);
+ if (err < 0) {
+ pr_err("Error %d creating CGR with ID %d\n", err,
+ priv->cgr_data.cgr.cgrid);
+ qman_release_cgrid(priv->cgr_data.cgr.cgrid);
+ goto out_error;
+ }
+ pr_debug("Created CGR %d for netdev with hwaddr %pM on QMan channel %d\n",
+ priv->cgr_data.cgr.cgrid, priv->mac_dev->addr,
+ priv->cgr_data.cgr.chan);
+
+out_error:
+ return err;
+}
+EXPORT_SYMBOL(dpaa_eth_cgr_init);
+
+static inline void dpa_setup_ingress(const struct dpa_priv_s *priv,
+ struct dpa_fq *fq,
+ const struct qman_fq *template)
+{
+ fq->fq_base = *template;
+ fq->net_dev = priv->net_dev;
+
+ fq->flags = QMAN_FQ_FLAG_NO_ENQUEUE;
+ fq->channel = priv->channel;
+}
+
+static inline void dpa_setup_egress(const struct dpa_priv_s *priv,
+ struct dpa_fq *fq,
+ struct fm_port *port,
+ const struct qman_fq *template)
+{
+ fq->fq_base = *template;
+ fq->net_dev = priv->net_dev;
+
+ if (port) {
+ fq->flags = QMAN_FQ_FLAG_TO_DCPORTAL;
+ fq->channel = (u16)fm_get_tx_port_channel(port);
+ } else {
+ fq->flags = QMAN_FQ_FLAG_NO_MODIFY;
+ }
+}
+
+void dpa_fq_setup(struct dpa_priv_s *priv, const struct dpa_fq_cbs_t *fq_cbs,
+ struct fm_port *tx_port)
+{
+ struct dpa_fq *fq;
+ u16 portals[NR_CPUS];
+ int cpu, num_portals = 0;
+ const cpumask_t *affine_cpus = qman_affine_cpus();
+ int egress_cnt = 0, conf_cnt = 0;
+
+ for_each_cpu(cpu, affine_cpus)
+ portals[num_portals++] = qman_affine_channel(cpu);
+ if (num_portals == 0)
+ dev_err(priv->net_dev->dev.parent,
+ "No Qman software (affine) channels found");
+
+ /* Initialize each FQ in the list */
+ list_for_each_entry(fq, &priv->dpa_fq_list, list) {
+ switch (fq->fq_type) {
+ case FQ_TYPE_RX_DEFAULT:
+ BUG_ON(!priv->mac_dev);
+ dpa_setup_ingress(priv, fq, &fq_cbs->rx_defq);
+ break;
+ case FQ_TYPE_RX_ERROR:
+ BUG_ON(!priv->mac_dev);
+ dpa_setup_ingress(priv, fq, &fq_cbs->rx_errq);
+ break;
+ case FQ_TYPE_TX:
+ dpa_setup_egress(priv, fq, tx_port,
+ &fq_cbs->egress_ern);
+ /* If we have more Tx queues than the number of cores,
+ * just ignore the extra ones.
+ */
+ if (egress_cnt < DPAA_ETH_TX_QUEUES)
+ priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+ break;
+ case FQ_TYPE_TX_CONFIRM:
+ BUG_ON(!priv->mac_dev);
+ dpa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
+ break;
+ case FQ_TYPE_TX_CONF_MQ:
+ BUG_ON(!priv->mac_dev);
+ dpa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
+ priv->conf_fqs[conf_cnt++] = &fq->fq_base;
+ break;
+ case FQ_TYPE_TX_ERROR:
+ BUG_ON(!priv->mac_dev);
+ dpa_setup_ingress(priv, fq, &fq_cbs->tx_errq);
+ break;
+ default:
+ dev_warn(priv->net_dev->dev.parent,
+ "Unknown FQ type detected!\n");
+ break;
+ }
+ }
+
+ /* The number of Tx queues may be smaller than the number of cores, if
+ * the Tx queue range is specified in the device tree instead of being
+ * dynamically allocated.
+ * Make sure all CPUs receive a corresponding Tx queue.
+ */
+ while (egress_cnt < DPAA_ETH_TX_QUEUES) {
+ list_for_each_entry(fq, &priv->dpa_fq_list, list) {
+ if (fq->fq_type != FQ_TYPE_TX)
+ continue;
+ priv->egress_fqs[egress_cnt++] = &fq->fq_base;
+ if (egress_cnt == DPAA_ETH_TX_QUEUES)
+ break;
+ }
+ }
+}
+EXPORT_SYMBOL(dpa_fq_setup);
+
+int dpa_fq_init(struct dpa_fq *dpa_fq, bool td_enable)
+{
+ int err;
+ const struct dpa_priv_s *priv;
+ struct device *dev;
+ struct qman_fq *fq;
+ struct qm_mcc_initfq initfq;
+ struct qman_fq *confq;
+
+ priv = netdev_priv(dpa_fq->net_dev);
+ dev = dpa_fq->net_dev->dev.parent;
+
+ if (dpa_fq->fqid == 0)
+ dpa_fq->flags |= QMAN_FQ_FLAG_DYNAMIC_FQID;
+
+ dpa_fq->init = !(dpa_fq->flags & QMAN_FQ_FLAG_NO_MODIFY);
+
+ err = qman_create_fq(dpa_fq->fqid, dpa_fq->flags, &dpa_fq->fq_base);
+ if (err) {
+ dev_err(dev, "qman_create_fq() failed\n");
+ return err;
+ }
+ fq = &dpa_fq->fq_base;
+
+ if (dpa_fq->init) {
+ initfq.we_mask = QM_INITFQ_WE_FQCTRL;
+ /* FIXME: why would we want to keep an empty FQ in cache? */
+ initfq.fqd.fq_ctrl = QM_FQCTRL_PREFERINCACHE;
+
+ /* Try to reduce the number of portal interrupts for
+ * Tx Confirmation FQs.
+ */
+ if (dpa_fq->fq_type == FQ_TYPE_TX_CONFIRM)
+ initfq.fqd.fq_ctrl |= QM_FQCTRL_HOLDACTIVE;
+
+ /* FQ placement */
+ initfq.we_mask |= QM_INITFQ_WE_DESTWQ;
+
+ initfq.fqd.dest.channel = dpa_fq->channel;
+ initfq.fqd.dest.wq = dpa_fq->wq;
+
+ /* Put all egress queues in a congestion group of their own.
+ * Sensu stricto, the Tx confirmation queues are Rx FQs,
+ * rather than Tx - but they nonetheless account for the
+ * memory footprint on behalf of egress traffic. We therefore
+ * place them in the netdev's CGR, along with the Tx FQs.
+ */
+ if (dpa_fq->fq_type == FQ_TYPE_TX ||
+ dpa_fq->fq_type == FQ_TYPE_TX_CONFIRM ||
+ dpa_fq->fq_type == FQ_TYPE_TX_CONF_MQ) {
+ initfq.we_mask |= QM_INITFQ_WE_CGID;
+ initfq.fqd.fq_ctrl |= QM_FQCTRL_CGE;
+ initfq.fqd.cgid = (u8)priv->cgr_data.cgr.cgrid;
+ /* Set a fixed overhead accounting, in an attempt to
+ * reduce the impact of fixed-size skb shells and the
+ * driver's needed headroom on system memory. This is
+ * especially the case when the egress traffic is
+ * composed of small datagrams.
+ * Unfortunately, QMan's OAL value is capped to an
+ * insufficient value, but even that is better than
+ * no overhead accounting at all.
+ */
+ initfq.we_mask |= QM_INITFQ_WE_OAC;
+ initfq.fqd.oac_init.oac = QM_OAC_CG;
+ initfq.fqd.oac_init.oal =
+ (signed char)(min(sizeof(struct sk_buff) +
+ priv->tx_headroom,
+ (size_t)FSL_QMAN_MAX_OAL));
+ }
+
+ if (td_enable) {
+ initfq.we_mask |= QM_INITFQ_WE_TDTHRESH;
+ qm_fqd_taildrop_set(&initfq.fqd.td,
+ DPA_FQ_TD, 1);
+ initfq.fqd.fq_ctrl = QM_FQCTRL_TDE;
+ }
+
+ /* Configure the Tx confirmation queue, now that we know
+ * which Tx queue it pairs with.
+ */
+ if (dpa_fq->fq_type == FQ_TYPE_TX) {
+ confq = _dpa_get_tx_conf_queue(priv, &dpa_fq->fq_base);
+ if (confq) {
+ initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
+ /* ContextA: OVOM=1 (use contextA2 bits instead of ICAD)
+ * A2V=1 (contextA A2 field is valid)
+ * A0V=1 (contextA A0 field is valid)
+ * ContextA A2: EBD=1 (deallocate buffers inside FMan)
+ */
+ initfq.fqd.context_a.hi = 0x1a000000;
+ initfq.fqd.context_a.lo = 0x80000000;
+ }
+ }
+
+ /* Put all *private* ingress queues in our "ingress CGR". */
+ if (priv->use_ingress_cgr &&
+ (dpa_fq->fq_type == FQ_TYPE_RX_DEFAULT ||
+ dpa_fq->fq_type == FQ_TYPE_RX_ERROR)) {
+ initfq.we_mask |= QM_INITFQ_WE_CGID;
+ initfq.fqd.fq_ctrl |= QM_FQCTRL_CGE;
+ initfq.fqd.cgid = (u8)priv->ingress_cgr.cgrid;
+ /* Set a fixed overhead accounting, just like for the
+ * egress CGR.
+ */
+ initfq.we_mask |= QM_INITFQ_WE_OAC;
+ initfq.fqd.oac_init.oac = QM_OAC_CG;
+ initfq.fqd.oac_init.oal =
+ (signed char)(min(sizeof(struct sk_buff) +
+ priv->tx_headroom, (size_t)FSL_QMAN_MAX_OAL));
+ }
+
+ /* Initialization common to all ingress queues */
+ if (dpa_fq->flags & QMAN_FQ_FLAG_NO_ENQUEUE) {
+ initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
+ initfq.fqd.fq_ctrl |=
+ QM_FQCTRL_CTXASTASHING | QM_FQCTRL_AVOIDBLOCK;
+ initfq.fqd.context_a.stashing.exclusive =
+ QM_STASHING_EXCL_DATA | QM_STASHING_EXCL_CTX |
+ QM_STASHING_EXCL_ANNOTATION;
+ initfq.fqd.context_a.stashing.data_cl = 2;
+ initfq.fqd.context_a.stashing.annotation_cl = 1;
+ initfq.fqd.context_a.stashing.context_cl =
+ DIV_ROUND_UP(sizeof(struct qman_fq), 64);
+ }
+
+ err = qman_init_fq(fq, QMAN_INITFQ_FLAG_SCHED, &initfq);
+ if (err < 0) {
+ dev_err(dev, "qman_init_fq(%u) = %d\n",
+ qman_fq_fqid(fq), err);
+ qman_destroy_fq(fq, 0);
+ return err;
+ }
+ }
+
+ dpa_fq->fqid = qman_fq_fqid(fq);
+
+ return 0;
+}
+EXPORT_SYMBOL(dpa_fq_init);
+
+static int __attribute__((nonnull))
+_dpa_fq_free(struct device *dev, struct qman_fq *fq)
+{
+ int err, error;
+ struct dpa_fq *dpa_fq;
+ const struct dpa_priv_s *priv;
+
+ err = 0;
+
+ dpa_fq = container_of(fq, struct dpa_fq, fq_base);
+ priv = netdev_priv(dpa_fq->net_dev);
+
+ if (dpa_fq->init) {
+ err = qman_retire_fq(fq, NULL);
+ if (unlikely(err < 0) && netif_msg_drv(priv))
+ dev_err(dev, "qman_retire_fq(%u) = %d\n",
+ qman_fq_fqid(fq), err);
+
+ error = qman_oos_fq(fq);
+ if (unlikely(error < 0) && netif_msg_drv(priv)) {
+ dev_err(dev, "qman_oos_fq(%u) = %d\n",
+ qman_fq_fqid(fq), error);
+ if (err >= 0)
+ err = error;
+ }
+ }
+
+ qman_destroy_fq(fq, 0);
+ list_del(&dpa_fq->list);
+
+ return err;
+}
+
+int __attribute__((nonnull))
+dpa_fq_free(struct device *dev, struct list_head *list)
+{
+ int err, error;
+ struct dpa_fq *dpa_fq, *tmp;
+
+ err = 0;
+ list_for_each_entry_safe(dpa_fq, tmp, list, list) {
+ error = _dpa_fq_free(dev, (struct qman_fq *)dpa_fq);
+ if (unlikely(error < 0) && err >= 0)
+ err = error;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(dpa_fq_free);
+
+static void
+dpaa_eth_init_tx_port(struct fm_port *port, struct dpa_fq *errq,
+ struct dpa_fq *defq,
+ struct dpa_buffer_layout_s *buf_layout)
+{
+ struct fm_port_params tx_port_param;
+
+ memset(&tx_port_param, 0, sizeof(tx_port_param));
+ dpaa_eth_init_port(tx, port, tx_port_param, errq->fqid, defq->fqid,
+ buf_layout, false);
+}
+
+static void
+dpaa_eth_init_rx_port(struct fm_port *port, struct dpa_bp *bp, size_t count,
+ struct dpa_fq *errq, struct dpa_fq *defq,
+ struct dpa_buffer_layout_s *buf_layout)
+{
+ struct fm_port_params rx_port_param;
+ int i;
+
+ memset(&rx_port_param, 0, sizeof(rx_port_param));
+ count = min(ARRAY_SIZE(rx_port_param.pool_param), count);
+ rx_port_param.num_pools = (u8)count;
+ for (i = 0; i < count; i++) {
+ if (i >= rx_port_param.num_pools)
+ break;
+ rx_port_param.pool_param[i].id = bp[i].bpid;
+ rx_port_param.pool_param[i].size = (u16)bp[i].size;
+ }
+
+ dpaa_eth_init_port(rx, port, rx_port_param, errq->fqid, defq->fqid,
+ buf_layout, false);
+}
+
+void dpaa_eth_init_ports(struct mac_device *mac_dev,
+ struct dpa_bp *bp, size_t count,
+ struct fm_port_fqs *port_fqs,
+ struct dpa_buffer_layout_s *buf_layout,
+ struct device *dev)
+{
+ struct fm_port *rxport = mac_dev->port_dev[RX];
+ struct fm_port *txport = mac_dev->port_dev[TX];
+
+ dpaa_eth_init_tx_port(txport, port_fqs->tx_errq,
+ port_fqs->tx_defq, &buf_layout[TX]);
+ dpaa_eth_init_rx_port(rxport, bp, count, port_fqs->rx_errq,
+ port_fqs->rx_defq, &buf_layout[RX]);
+}
+EXPORT_SYMBOL(dpaa_eth_init_ports);
+
+void __attribute__((nonnull))
+dpa_fd_release(const struct net_device *net_dev, const struct qm_fd *fd)
+{
+ struct dpa_bp *_dpa_bp;
+ struct bm_buffer _bmb;
+
+ _bmb.hi = fd->addr_hi;
+ _bmb.lo = fd->addr_lo;
+
+ _dpa_bp = dpa_bpid2pool(fd->bpid);
+ DPA_ERR_ON(!_dpa_bp);
+
+ DPA_ERR_ON(fd->format == qm_fd_sg);
+
+ while (bman_release(_dpa_bp->pool, &_bmb, 1, 0))
+ cpu_relax();
+}
+EXPORT_SYMBOL(dpa_fd_release);
+
+/**
+ * Turn on HW checksum computation for this outgoing frame.
+ * If the current protocol is not something we support in this regard
+ * (or if the stack has already computed the SW checksum), we do nothing.
+ *
+ * Returns 0 if all goes well (or HW csum doesn't apply), and a negative value
+ * otherwise.
+ *
+ * Note that this function may modify the fd->cmd field and the skb data buffer
+ * (the Parse Results area).
+ */
+int dpa_enable_tx_csum(struct dpa_priv_s *priv,
+ struct sk_buff *skb,
+ struct qm_fd *fd,
+ char *parse_results)
+{
+ fm_prs_result *parse_result;
+ struct iphdr *iph;
+ struct ipv6hdr *ipv6h = NULL;
+ int l4_proto;
+ int ethertype = ntohs(skb->protocol);
+ int retval = 0;
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ return 0;
+
+ /* Note: L3 csum seems to be already computed in sw, but we can't choose
+ * L4 alone from the FM configuration anyway.
+ */
+
+ /* Fill in some fields of the Parse Results array, so the FMan
+ * can find them as if they came from the FMan Parser.
+ */
+ parse_result = (fm_prs_result *)parse_results;
+
+ /* If we're dealing with VLAN, get the real Ethernet type */
+ if (ethertype == ETH_P_8021Q) {
+ /* We can't always assume the MAC header is set correctly
+ * by the stack, so reset to beginning of skb->data
+ */
+ skb_reset_mac_header(skb);
+ ethertype = ntohs(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
+ }
+
+ /* Fill in the relevant L3 parse result fields
+ * and read the L4 protocol type
+ */
+ switch (ethertype) {
+ case ETH_P_IP:
+ parse_result->l3r = FM_L3_PARSE_RESULT_IPV4;
+ iph = ip_hdr(skb);
+ DPA_ERR_ON(!iph);
+ l4_proto = ntohs(iph->protocol);
+ break;
+ case ETH_P_IPV6:
+ parse_result->l3r = FM_L3_PARSE_RESULT_IPV6;
+ ipv6h = ipv6_hdr(skb);
+ DPA_ERR_ON(!ipv6h);
+ l4_proto = ntohs(ipv6h->nexthdr);
+ break;
+ default:
+ /* We shouldn't even be here */
+ if (net_ratelimit())
+ netif_alert(priv, tx_err, priv->net_dev,
+ "Can't compute HW csum for L3 proto 0x%x\n",
+ ntohs(skb->protocol));
+ retval = -EIO;
+ goto return_error;
+ }
+
+ /* Fill in the relevant L4 parse result fields */
+ switch (l4_proto) {
+ case IPPROTO_UDP:
+ parse_result->l4r = FM_L4_PARSE_RESULT_UDP;
+ break;
+ case IPPROTO_TCP:
+ parse_result->l4r = FM_L4_PARSE_RESULT_TCP;
+ break;
+ default:
+ /* This can as well be a BUG() */
+ if (net_ratelimit())
+ netif_alert(priv, tx_err, priv->net_dev,
+ "Can't compute HW csum for L4 proto 0x%x\n",
+ l4_proto);
+ retval = -EIO;
+ goto return_error;
+ }
+
+ /* At index 0 is IPOffset_1 as defined in the Parse Results */
+ parse_result->ip_off[0] = (u8)skb_network_offset(skb);
+ parse_result->l4_off = (u8)skb_transport_offset(skb);
+
+ /* Enable L3 (and L4, if TCP or UDP) HW checksum. */
+ fd->cmd |= FM_FD_CMD_RPD | FM_FD_CMD_DTC;
+
+ /* On P1023 and similar platforms fd->cmd interpretation could
+ * be disabled by setting CONTEXT_A bit ICMD; currently this bit
+ * is not set so we do not need to check; in the future, if/when
+ * using context_a we need to check this bit
+ */
+
+return_error:
+ return retval;
+}
+EXPORT_SYMBOL(dpa_enable_tx_csum);
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
new file mode 100644
index 0000000..f36a49d
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.h
@@ -0,0 +1,119 @@
+/* Copyright 2008 - 2015 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DPAA_ETH_COMMON_H
+#define __DPAA_ETH_COMMON_H
+
+#include <linux/etherdevice.h>
+#include <soc/fsl/bman.h>
+#include <linux/of_platform.h>
+#include <linux/net_tstamp.h>
+
+#include "dpaa_eth.h"
+#include "fsl_fman_drv.h"
+
+#define dpaa_eth_init_port(type, port, param, errq_id, defq_id, buf_layout,\
+ frag_enabled) \
+{ \
+ param.errq = errq_id; \
+ param.defq = defq_id; \
+ param.priv_data_size = buf_layout->priv_data_size; \
+ param.parse_results = buf_layout->parse_results; \
+ param.hash_results = buf_layout->hash_results; \
+ param.time_stamp = buf_layout->time_stamp; \
+ param.data_align = buf_layout->data_align; \
+ fm_set_##type##_port_params(port, &param); \
+}
+
+#define DPA_BUFF_RELEASE_MAX 8 /* maximum number of buffers released at once */
+
+/* used in napi related functions */
+extern u16 qman_portal_max;
+
+int dpa_netdev_init(struct net_device *net_dev,
+ const u8 *mac_addr,
+ u16 tx_timeout);
+int dpa_start(struct net_device *net_dev);
+int dpa_stop(struct net_device *net_dev);
+void dpa_timeout(struct net_device *net_dev);
+struct rtnl_link_stats64 * __cold
+dpa_get_stats64(struct net_device *net_dev,
+ struct rtnl_link_stats64 *stats);
+int dpa_change_mtu(struct net_device *net_dev, int new_mtu);
+int dpa_ndo_init(struct net_device *net_dev);
+int dpa_set_features(struct net_device *dev, netdev_features_t features);
+netdev_features_t dpa_fix_features(struct net_device *dev,
+ netdev_features_t features);
+int dpa_remove(struct platform_device *pdev);
+struct mac_device * __must_check
+__attribute__((nonnull)) dpa_mac_dev_get(struct platform_device *pdev);
+int dpa_mac_hw_index_get(struct platform_device *pdev);
+int dpa_mac_fman_index_get(struct platform_device *pdev);
+int dpa_set_mac_address(struct net_device *net_dev, void *addr);
+void dpa_set_rx_mode(struct net_device *net_dev);
+void dpa_set_buffers_layout(struct mac_device *mac_dev,
+ struct dpa_buffer_layout_s *layout);
+int __attribute__((nonnull))
+dpa_bp_alloc(struct dpa_bp *dpa_bp);
+void __attribute__((nonnull))
+dpa_bp_free(struct dpa_priv_s *priv);
+struct dpa_bp *dpa_bpid2pool(int bpid);
+void dpa_bpid2pool_map(int bpid, struct dpa_bp *dpa_bp);
+bool dpa_bpid2pool_use(int bpid);
+void dpa_bp_drain(struct dpa_bp *bp);
+struct dpa_fq *dpa_fq_alloc(struct device *dev,
+ const struct fqid_cell *fqids,
+ struct list_head *list,
+ enum dpa_fq_type fq_type);
+int dpa_fq_probe_mac(struct device *dev, struct list_head *list,
+ struct fm_port_fqs *port_fqs,
+ bool tx_conf_fqs_per_core,
+ enum port_type ptype);
+int dpa_get_channel(void);
+void dpa_release_channel(void);
+int dpaa_eth_add_channel(void *__arg);
+int dpaa_eth_cgr_init(struct dpa_priv_s *priv);
+void dpa_fq_setup(struct dpa_priv_s *priv, const struct dpa_fq_cbs_t *fq_cbs,
+ struct fm_port *tx_port);
+int dpa_fq_init(struct dpa_fq *dpa_fq, bool td_enable);
+int __attribute__((nonnull))
+dpa_fq_free(struct device *dev, struct list_head *list);
+void dpaa_eth_init_ports(struct mac_device *mac_dev,
+ struct dpa_bp *bp, size_t count,
+ struct fm_port_fqs *port_fqs,
+ struct dpa_buffer_layout_s *buf_layout,
+ struct device *dev);
+void __attribute__((nonnull))
+dpa_fd_release(const struct net_device *net_dev, const struct qm_fd *fd);
+int dpa_enable_tx_csum(struct dpa_priv_s *priv,
+ struct sk_buff *skb,
+ struct qm_fd *fd,
+ char *parse_results);
+#endif /* __DPAA_ETH_COMMON_H */
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c
new file mode 100644
index 0000000..1c0bdf0
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sg.c
@@ -0,0 +1,428 @@
+/* Copyright 2012 - 2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/highmem.h>
+#include <soc/fsl/bman.h>
+
+#include "dpaa_eth.h"
+#include "dpaa_eth_common.h"
+
+/* Convenience macros for storing/retrieving the skb back-pointers.
+ *
+ * NB: @off is an offset from a (struct sk_buff **) pointer!
+ */
+#define DPA_WRITE_SKB_PTR(skb, skbh, addr, off) \
+ { \
+ skbh = (struct sk_buff **)addr; \
+ *(skbh + (off)) = skb; \
+ }
+#define DPA_READ_SKB_PTR(skb, skbh, addr, off) \
+ { \
+ skbh = (struct sk_buff **)addr; \
+ skb = *(skbh + (off)); \
+ }
+
+static int _dpa_bp_add_8_bufs(const struct dpa_bp *dpa_bp)
+{
+ struct bm_buffer bmb[8];
+ void *new_buf;
+ dma_addr_t addr;
+ u8 i;
+ struct device *dev = dpa_bp->dev;
+ struct sk_buff *skb, **skbh;
+
+ for (i = 0; i < 8; i++) {
+ /* We'll prepend the skb back-pointer; can't use the DPA
+ * priv space, because FMan will overwrite it (from offset 0)
+ * if it ends up being the second, third, etc. fragment
+ * in a S/G frame.
+ *
+ * We only need enough space to store a pointer, but allocate
+ * an entire cacheline for performance reasons.
+ */
+ new_buf = netdev_alloc_frag(SMP_CACHE_BYTES + DPA_BP_RAW_SIZE);
+ if (unlikely(!new_buf))
+ goto netdev_alloc_failed;
+ new_buf = PTR_ALIGN(new_buf + SMP_CACHE_BYTES, SMP_CACHE_BYTES);
+
+ skb = build_skb(new_buf, DPA_SKB_SIZE(dpa_bp->size) +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
+ if (unlikely(!skb)) {
+ put_page(virt_to_head_page(new_buf));
+ goto build_skb_failed;
+ }
+ DPA_WRITE_SKB_PTR(skb, skbh, new_buf, -1);
+
+ addr = dma_map_single(dev, new_buf,
+ dpa_bp->size, DMA_BIDIRECTIONAL);
+ if (unlikely(dma_mapping_error(dev, addr)))
+ goto dma_map_failed;
+
+ bm_buffer_set64(&bmb[i], addr);
+ }
+
+release_bufs:
+ /* Release the buffers. In case bman is busy, keep trying
+ * until successful. bman_release() is guaranteed to succeed
+ * in a reasonable amount of time
+ */
+ while (unlikely(bman_release(dpa_bp->pool, bmb, i, 0)))
+ cpu_relax();
+ return i;
+
+dma_map_failed:
+ kfree_skb(skb);
+
+build_skb_failed:
+netdev_alloc_failed:
+ net_err_ratelimited("dpa_bp_add_8_bufs() failed\n");
+ WARN_ONCE(1, "Memory allocation failure on Rx\n");
+
+ bm_buffer_set64(&bmb[i], 0);
+ /* Avoid releasing a completely null buffer; bman_release() requires
+ * at least one buffer.
+ */
+ if (likely(i))
+ goto release_bufs;
+
+ return 0;
+}
+
+/* Cold path wrapper over _dpa_bp_add_8_bufs(). */
+static void dpa_bp_add_8_bufs(const struct dpa_bp *dpa_bp, int cpu)
+{
+ int *count_ptr = per_cpu_ptr(dpa_bp->percpu_count, cpu);
+ *count_ptr += _dpa_bp_add_8_bufs(dpa_bp);
+}
+
+int dpa_bp_priv_seed(struct dpa_bp *dpa_bp)
+{
+ int i;
+
+ /* Give each CPU an allotment of "config_count" buffers */
+ for_each_possible_cpu(i) {
+ int j;
+
+ /* Although we access another CPU's counters here
+ * we do it at boot time so it is safe
+ */
+ for (j = 0; j < dpa_bp->config_count; j += 8)
+ dpa_bp_add_8_bufs(dpa_bp, i);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(dpa_bp_priv_seed);
+
+/* Add buffers/(pages) for Rx processing whenever bpool count falls below
+ * REFILL_THRESHOLD.
+ */
+int dpaa_eth_refill_bpools(struct dpa_bp *dpa_bp, int *countptr)
+{
+ int count = *countptr;
+ int new_bufs;
+
+ if (unlikely(count < FSL_DPAA_ETH_REFILL_THRESHOLD)) {
+ do {
+ new_bufs = _dpa_bp_add_8_bufs(dpa_bp);
+ if (unlikely(!new_bufs)) {
+ /* Avoid looping forever if we've temporarily
+ * run out of memory. We'll try again at the
+ * next NAPI cycle.
+ */
+ break;
+ }
+ count += new_bufs;
+ } while (count < FSL_DPAA_ETH_MAX_BUF_COUNT);
+
+ *countptr = count;
+ if (unlikely(count < FSL_DPAA_ETH_MAX_BUF_COUNT))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(dpaa_eth_refill_bpools);
+
+/* Cleanup function for outgoing frame descriptors that were built on Tx path,
+ * either contiguous frames or scatter/gather ones.
+ * Skb freeing is not handled here.
+ *
+ * This function may be called on error paths in the Tx function, so guard
+ * against cases when not all fd relevant fields were filled in.
+ *
+ * Return the skb backpointer, since for S/G frames the buffer containing it
+ * gets freed here.
+ */
+struct sk_buff *_dpa_cleanup_tx_fd(const struct dpa_priv_s *priv,
+ const struct qm_fd *fd)
+{
+ struct dpa_bp *dpa_bp = priv->dpa_bp;
+ dma_addr_t addr = qm_fd_addr(fd);
+ struct sk_buff **skbh;
+ struct sk_buff *skb = NULL;
+ const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
+ int nr_frags;
+
+ dma_unmap_single(dpa_bp->dev, addr, dpa_bp->size, dma_dir);
+
+ /* retrieve skb back pointer */
+ DPA_READ_SKB_PTR(skb, skbh, phys_to_virt(addr), 0);
+ nr_frags = skb_shinfo(skb)->nr_frags;
+
+ return skb;
+}
+
+/* Build a linear skb around the received buffer.
+ * We are guaranteed there is enough room at the end of the data buffer to
+ * accommodate the shared info area of the skb.
+ */
+static struct sk_buff *__hot contig_fd_to_skb(const struct dpa_priv_s *priv,
+ const struct qm_fd *fd)
+{
+ struct sk_buff *skb = NULL, **skbh;
+ ssize_t fd_off = dpa_fd_offset(fd);
+ dma_addr_t addr = qm_fd_addr(fd);
+ void *vaddr;
+
+ vaddr = phys_to_virt(addr);
+ DPA_ERR_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));
+
+ /* Retrieve the skb and adjust data and tail pointers, to make sure
+ * forwarded skbs will have enough space on Tx if extra headers
+ * are added.
+ */
+ DPA_READ_SKB_PTR(skb, skbh, vaddr, -1);
+
+ DPA_ERR_ON(fd_off != priv->rx_headroom);
+ skb_reserve(skb, fd_off);
+ skb_put(skb, dpa_fd_length(fd));
+
+ skb->ip_summed = CHECKSUM_NONE;
+
+ return skb;
+}
+
+void __hot _dpa_rx(struct net_device *net_dev,
+ struct qman_portal *portal,
+ const struct dpa_priv_s *priv,
+ struct dpa_percpu_priv_s *percpu_priv,
+ const struct qm_fd *fd,
+ u32 fqid,
+ int *count_ptr)
+{
+ struct dpa_bp *dpa_bp;
+ struct sk_buff *skb;
+ dma_addr_t addr = qm_fd_addr(fd);
+ u32 fd_status = fd->status;
+ unsigned int skb_len;
+ struct rtnl_link_stats64 *percpu_stats = &percpu_priv->stats;
+
+ if (unlikely(fd_status & FM_FD_STAT_RX_ERRORS) != 0) {
+ if (net_ratelimit())
+ netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
+ fd_status & FM_FD_STAT_RX_ERRORS);
+
+ percpu_stats->rx_errors++;
+ goto _release_frame;
+ }
+
+ dpa_bp = priv->dpa_bp;
+ DPA_ERR_ON(dpa_bp != dpa_bpid2pool(fd->bpid));
+
+ /* prefetch the first 64 bytes of the frame */
+ dma_unmap_single(dpa_bp->dev, addr, dpa_bp->size, DMA_BIDIRECTIONAL);
+ prefetch(phys_to_virt(addr) + dpa_fd_offset(fd));
+
+ /* The only FD type that we may receive is contig */
+ DPA_ERR_ON((fd->format != qm_fd_contig));
+
+ skb = contig_fd_to_skb(priv, fd);
+
+ /* Account for the contig buffer
+ * having been removed from the pool.
+ */
+ (*count_ptr)--;
+ skb->protocol = eth_type_trans(skb, net_dev);
+
+ /* IP Reassembled frames are allowed to be larger than MTU */
+ if (unlikely(dpa_check_rx_mtu(skb, net_dev->mtu) &&
+ !(fd_status & FM_FD_IPR))) {
+ percpu_stats->rx_dropped++;
+ goto drop_bad_frame;
+ }
+
+ skb_len = skb->len;
+
+ if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
+ goto packet_dropped;
+
+ percpu_stats->rx_packets++;
+ percpu_stats->rx_bytes += skb_len;
+
+packet_dropped:
+ return;
+
+drop_bad_frame:
+ dev_kfree_skb(skb);
+ return;
+
+_release_frame:
+ dpa_fd_release(net_dev, fd);
+}
+
+static int __hot skb_to_contig_fd(struct dpa_priv_s *priv,
+ struct sk_buff *skb, struct qm_fd *fd,
+ int *count_ptr, int *offset)
+{
+ struct sk_buff **skbh;
+ dma_addr_t addr;
+ struct dpa_bp *dpa_bp = priv->dpa_bp;
+ struct net_device *net_dev = priv->net_dev;
+ int err;
+ enum dma_data_direction dma_dir;
+ unsigned char *buffer_start;
+
+ {
+ /* We are guaranteed to have at least tx_headroom bytes
+ * available, so just use that for offset.
+ */
+ fd->bpid = 0xff;
+ buffer_start = skb->data - priv->tx_headroom;
+ fd->offset = priv->tx_headroom;
+ dma_dir = DMA_TO_DEVICE;
+
+ DPA_WRITE_SKB_PTR(skb, skbh, buffer_start, 0);
+ }
+
+ /* Enable L3/L4 hardware checksum computation.
+ *
+ * We must do this before dma_map_single(DMA_TO_DEVICE), because we may
+ * need to write into the skb.
+ */
+ err = dpa_enable_tx_csum(priv, skb, fd,
+ ((char *)skbh) + DPA_TX_PRIV_DATA_SIZE);
+ if (unlikely(err < 0)) {
+ if (net_ratelimit())
+ netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
+ err);
+ return err;
+ }
+
+ /* Fill in the rest of the FD fields */
+ fd->format = qm_fd_contig;
+ fd->length20 = skb->len;
+ fd->cmd |= FM_FD_CMD_FCO;
+
+ /* Map the entire buffer size that may be seen by FMan, but no more */
+ addr = dma_map_single(dpa_bp->dev, skbh,
+ skb_end_pointer(skb) - buffer_start, dma_dir);
+ if (unlikely(dma_mapping_error(dpa_bp->dev, addr))) {
+ if (net_ratelimit())
+ netif_err(priv, tx_err, net_dev, "dma_map_single() failed\n");
+ return -EINVAL;
+ }
+ fd->addr_hi = (u8)upper_32_bits(addr);
+ fd->addr_lo = lower_32_bits(addr);
+
+ return 0;
+}
+
+int __hot dpa_tx(struct sk_buff *skb, struct net_device *net_dev)
+{
+ struct dpa_priv_s *priv;
+ struct qm_fd fd;
+ struct dpa_percpu_priv_s *percpu_priv;
+ struct rtnl_link_stats64 *percpu_stats;
+ const int queue_mapping = dpa_get_queue_mapping(skb);
+ int *countptr, offset = 0;
+
+ priv = netdev_priv(net_dev);
+ /* Non-migratable context, safe to use raw_cpu_ptr */
+ percpu_priv = raw_cpu_ptr(priv->percpu_priv);
+ percpu_stats = &percpu_priv->stats;
+ countptr = raw_cpu_ptr(priv->dpa_bp->percpu_count);
+
+ clear_fd(&fd);
+
+ /* Make sure we have enough headroom to accommodate private
+ * data, parse results, etc. Normally this shouldn't happen if
+ * we're here via the standard kernel stack.
+ */
+ if (unlikely(skb_headroom(skb) < priv->tx_headroom)) {
+ struct sk_buff *skb_new;
+
+ skb_new = skb_realloc_headroom(skb, priv->tx_headroom);
+ if (unlikely(!skb_new)) {
+ dev_kfree_skb(skb);
+ percpu_stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+ dev_kfree_skb(skb);
+ skb = skb_new;
+ }
+
+ /* We're going to store the skb backpointer at the beginning
+ * of the data buffer, so we need a privately owned skb
+ */
+
+ /* Code borrowed from skb_unshare(). */
+ if (skb_cloned(skb)) {
+ struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC);
+
+ /* Finally, create a contig FD from this skb */
+ skb_to_contig_fd(priv, skb, &fd, countptr, &offset);
+
+ kfree_skb(skb);
+ skb = nskb;
+ /* skb_copy() has now linearized the skbuff. */
+ }
+
+ if (unlikely(dpa_xmit(priv, percpu_stats, queue_mapping, &fd) < 0))
+ goto xmit_failed;
+
+ net_dev->trans_start = jiffies;
+ return NETDEV_TX_OK;
+
+xmit_failed:
+ if (fd.cmd & FM_FD_CMD_FCO) {
+ (*countptr)--;
+ dpa_fd_release(net_dev, &fd);
+ percpu_stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+ _dpa_cleanup_tx_fd(priv, &fd);
+ percpu_stats->tx_errors++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
--
1.7.11.7

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