[PATCH net-next v7 1/8] octeon_ep_vf: Add driver framework and device initialization

From: Shinas Rasheed
Date: Thu Feb 08 2024 - 05:22:46 EST

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Add driver framework and device setup and initialization for Octeon
PCI Endpoint NIC VF.

Add implementation to load module, initialize, register network device,
cleanup and unload module.

Signed-off-by: Shinas Rasheed <srasheed@xxxxxxxxxxx>
---
V7:
- Separated octep_vf_get_if_stats from octep_vf_main.h to later patch

V6: https://lore.kernel.org/all/20240207065207.3092004-2-srasheed@xxxxxxxxxxx/
- Removed reuse of netif_tx_stop_all_queues, called implicitly in
netif_tx_disable, when stopping netdev
- Corrected error jump labels to have proper action-specific names in
probe function
- Removed singlethreaded workqueue implementation, since only tx
timeout task is run. Run the same in the system workqueue
- netdev_hold when tx_timeout happens to protect against free_netdev
if race occurs between rmmod and a tx timeout. netdev_put the
reference when timeout task ends to progress freeing netdev

V5: https://lore.kernel.org/all/20240129050254.3047778-2-srasheed@xxxxxxxxxxx/
- No changes

V4: https://lore.kernel.org/all/20240108124213.2966536-2-srasheed@xxxxxxxxxxx/
- No changes

V3: https://lore.kernel.org/all/20240105203823.2953604-2-srasheed@xxxxxxxxxxx/
- Removed UINT64_MAX, which is unused

V2: https://lore.kernel.org/all/20231223134000.2906144-2-srasheed@xxxxxxxxxxx/
- Removed linux/version.h header file from inclusion in
octep_vf_main.c

V1: https://lore.kernel.org/all/20231221092844.2885872-2-srasheed@xxxxxxxxxxx/

.../device_drivers/ethernet/index.rst | 1 +
.../ethernet/marvell/octeon_ep_vf.rst | 24 +
drivers/net/ethernet/marvell/Kconfig | 1 +
drivers/net/ethernet/marvell/Makefile | 1 +
.../net/ethernet/marvell/octeon_ep_vf/Kconfig | 19 +
.../ethernet/marvell/octeon_ep_vf/Makefile | 9 +
.../marvell/octeon_ep_vf/octep_vf_cn9k.c | 157 ++++++
.../marvell/octeon_ep_vf/octep_vf_cnxk.c | 158 ++++++
.../marvell/octeon_ep_vf/octep_vf_config.h | 160 ++++++
.../marvell/octeon_ep_vf/octep_vf_main.c | 516 ++++++++++++++++++
.../marvell/octeon_ep_vf/octep_vf_main.h | 331 +++++++++++
.../marvell/octeon_ep_vf/octep_vf_mbox.c | 96 ++++
.../marvell/octeon_ep_vf/octep_vf_mbox.h | 25 +
.../marvell/octeon_ep_vf/octep_vf_regs_cn9k.h | 154 ++++++
.../marvell/octeon_ep_vf/octep_vf_regs_cnxk.h | 162 ++++++
.../marvell/octeon_ep_vf/octep_vf_rx.c | 42 ++
.../marvell/octeon_ep_vf/octep_vf_rx.h | 224 ++++++++
.../marvell/octeon_ep_vf/octep_vf_tx.c | 43 ++
.../marvell/octeon_ep_vf/octep_vf_tx.h | 276 ++++++++++
19 files changed, 2374 insertions(+)
create mode 100644 Documentation/networking/device_drivers/ethernet/marvell/octeon_ep_vf.rst
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/Kconfig
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/Makefile
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_config.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cn9k.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cnxk.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.h
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.c
create mode 100644 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.h

diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/Documentation/networking/device_drivers/ethernet/index.rst
index 43de285b8a92..6932d8c043c2 100644
--- a/Documentation/networking/device_drivers/ethernet/index.rst
+++ b/Documentation/networking/device_drivers/ethernet/index.rst
@@ -42,6 +42,7 @@ Contents:
intel/ice
marvell/octeontx2
marvell/octeon_ep
+ marvell/octeon_ep_vf
mellanox/mlx5/index
microsoft/netvsc
neterion/s2io
diff --git a/Documentation/networking/device_drivers/ethernet/marvell/octeon_ep_vf.rst b/Documentation/networking/device_drivers/ethernet/marvell/octeon_ep_vf.rst
new file mode 100644
index 000000000000..603133d0b92f
--- /dev/null
+++ b/Documentation/networking/device_drivers/ethernet/marvell/octeon_ep_vf.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+=======================================================================
+Linux kernel networking driver for Marvell's Octeon PCI Endpoint NIC VF
+=======================================================================
+
+Network driver for Marvell's Octeon PCI EndPoint NIC VF.
+Copyright (c) 2020 Marvell International Ltd.
+
+Overview
+========
+This driver implements networking functionality of Marvell's Octeon PCI
+EndPoint NIC VF.
+
+Supported Devices
+=================
+Currently, this driver support following devices:
+ * Network controller: Cavium, Inc. Device b203
+ * Network controller: Cavium, Inc. Device b403
+ * Network controller: Cavium, Inc. Device b103
+ * Network controller: Cavium, Inc. Device b903
+ * Network controller: Cavium, Inc. Device ba03
+ * Network controller: Cavium, Inc. Device bc03
+ * Network controller: Cavium, Inc. Device bd03
diff --git a/drivers/net/ethernet/marvell/Kconfig b/drivers/net/ethernet/marvell/Kconfig
index 884d64114bff..837295fecd17 100644
--- a/drivers/net/ethernet/marvell/Kconfig
+++ b/drivers/net/ethernet/marvell/Kconfig
@@ -180,6 +180,7 @@ config SKY2_DEBUG

source "drivers/net/ethernet/marvell/octeontx2/Kconfig"
source "drivers/net/ethernet/marvell/octeon_ep/Kconfig"
+source "drivers/net/ethernet/marvell/octeon_ep_vf/Kconfig"
source "drivers/net/ethernet/marvell/prestera/Kconfig"

endif # NET_VENDOR_MARVELL
diff --git a/drivers/net/ethernet/marvell/Makefile b/drivers/net/ethernet/marvell/Makefile
index ceba4aa4f026..a399defe25fd 100644
--- a/drivers/net/ethernet/marvell/Makefile
+++ b/drivers/net/ethernet/marvell/Makefile
@@ -12,5 +12,6 @@ obj-$(CONFIG_PXA168_ETH) += pxa168_eth.o
obj-$(CONFIG_SKGE) += skge.o
obj-$(CONFIG_SKY2) += sky2.o
obj-y += octeon_ep/
+obj-y += octeon_ep_vf/
obj-y += octeontx2/
obj-y += prestera/
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/Kconfig b/drivers/net/ethernet/marvell/octeon_ep_vf/Kconfig
new file mode 100644
index 000000000000..dbd1267bda0c
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Marvell's Octeon PCI Endpoint NIC VF Driver Configuration
+#
+
+config OCTEON_EP_VF
+ tristate "Marvell Octeon PCI Endpoint NIC VF Driver"
+ depends on 64BIT
+ depends on PCI
+ help
+ This driver supports networking functionality of Marvell's
+ Octeon PCI Endpoint NIC VF.
+
+ To know the list of devices supported by this driver, refer
+ documentation in
+ <file:Documentation/networking/device_drivers/ethernet/marvell/octeon_ep_vf.rst>.
+
+ To compile this drivers as a module, choose M here. Name of the
+ module is octeon_ep_vf.
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/Makefile b/drivers/net/ethernet/marvell/octeon_ep_vf/Makefile
new file mode 100644
index 000000000000..694eb9b46e99
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Network driver for Marvell's Octeon PCI Endpoint NIC VF
+#
+
+obj-$(CONFIG_OCTEON_EP_VF) += octeon_ep_vf.o
+
+octeon_ep_vf-y := octep_vf_main.o octep_vf_cn9k.o octep_vf_cnxk.o \
+ octep_vf_tx.o octep_vf_rx.o octep_vf_mbox.o
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c
new file mode 100644
index 000000000000..c24ef2265205
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+#include "octep_vf_regs_cn9k.h"
+
+/* Reset all hardware Tx/Rx queues */
+static void octep_vf_reset_io_queues_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Initialize configuration limits and initial active config */
+static void octep_vf_init_config_cn93_vf(struct octep_vf_device *oct)
+{
+ struct octep_vf_config *conf = oct->conf;
+ u64 reg_val;
+
+ reg_val = octep_vf_read_csr64(oct, CN93_VF_SDP_R_IN_CONTROL(0));
+ conf->ring_cfg.max_io_rings = (reg_val >> CN93_VF_R_IN_CTL_RPVF_POS) &
+ CN93_VF_R_IN_CTL_RPVF_MASK;
+ conf->ring_cfg.active_io_rings = conf->ring_cfg.max_io_rings;
+
+ conf->iq.num_descs = OCTEP_VF_IQ_MAX_DESCRIPTORS;
+ conf->iq.instr_type = OCTEP_VF_64BYTE_INSTR;
+ conf->iq.db_min = OCTEP_VF_DB_MIN;
+ conf->iq.intr_threshold = OCTEP_VF_IQ_INTR_THRESHOLD;
+
+ conf->oq.num_descs = OCTEP_VF_OQ_MAX_DESCRIPTORS;
+ conf->oq.buf_size = OCTEP_VF_OQ_BUF_SIZE;
+ conf->oq.refill_threshold = OCTEP_VF_OQ_REFILL_THRESHOLD;
+ conf->oq.oq_intr_pkt = OCTEP_VF_OQ_INTR_PKT_THRESHOLD;
+ conf->oq.oq_intr_time = OCTEP_VF_OQ_INTR_TIME_THRESHOLD;
+
+ conf->msix_cfg.ioq_msix = conf->ring_cfg.active_io_rings;
+}
+
+/* Setup registers for a hardware Tx Queue */
+static void octep_vf_setup_iq_regs_cn93(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Setup registers for a hardware Rx Queue */
+static void octep_vf_setup_oq_regs_cn93(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Setup registers for a VF mailbox */
+static void octep_vf_setup_mbox_regs_cn93(struct octep_vf_device *oct, int q_no)
+{
+}
+
+/* Tx/Rx queue interrupt handler */
+static irqreturn_t octep_vf_ioq_intr_handler_cn93(void *data)
+{
+ return IRQ_HANDLED;
+}
+
+/* Re-initialize Octeon hardware registers */
+static void octep_vf_reinit_regs_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Enable all interrupts */
+static void octep_vf_enable_interrupts_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Disable all interrupts */
+static void octep_vf_disable_interrupts_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Get new Octeon Read Index: index of descriptor that Octeon reads next. */
+static u32 octep_vf_update_iq_read_index_cn93(struct octep_vf_iq *iq)
+{
+ return 0;
+}
+
+/* Enable a hardware Tx Queue */
+static void octep_vf_enable_iq_cn93(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Enable a hardware Rx Queue */
+static void octep_vf_enable_oq_cn93(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Enable all hardware Tx/Rx Queues assigned to VF */
+static void octep_vf_enable_io_queues_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Disable a hardware Tx Queue assigned to VF */
+static void octep_vf_disable_iq_cn93(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Disable a hardware Rx Queue assigned to VF */
+static void octep_vf_disable_oq_cn93(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Disable all hardware Tx/Rx Queues assigned to VF */
+static void octep_vf_disable_io_queues_cn93(struct octep_vf_device *oct)
+{
+}
+
+/* Dump hardware registers (including Tx/Rx queues) for debugging. */
+static void octep_vf_dump_registers_cn93(struct octep_vf_device *oct)
+{
+}
+
+/**
+ * octep_vf_device_setup_cn93() - Setup Octeon device.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * - initialize hardware operations.
+ * - get target side pcie port number for the device.
+ * - set initial configuration and max limits.
+ */
+void octep_vf_device_setup_cn93(struct octep_vf_device *oct)
+{
+ oct->hw_ops.setup_iq_regs = octep_vf_setup_iq_regs_cn93;
+ oct->hw_ops.setup_oq_regs = octep_vf_setup_oq_regs_cn93;
+ oct->hw_ops.setup_mbox_regs = octep_vf_setup_mbox_regs_cn93;
+
+ oct->hw_ops.ioq_intr_handler = octep_vf_ioq_intr_handler_cn93;
+ oct->hw_ops.reinit_regs = octep_vf_reinit_regs_cn93;
+
+ oct->hw_ops.enable_interrupts = octep_vf_enable_interrupts_cn93;
+ oct->hw_ops.disable_interrupts = octep_vf_disable_interrupts_cn93;
+
+ oct->hw_ops.update_iq_read_idx = octep_vf_update_iq_read_index_cn93;
+
+ oct->hw_ops.enable_iq = octep_vf_enable_iq_cn93;
+ oct->hw_ops.enable_oq = octep_vf_enable_oq_cn93;
+ oct->hw_ops.enable_io_queues = octep_vf_enable_io_queues_cn93;
+
+ oct->hw_ops.disable_iq = octep_vf_disable_iq_cn93;
+ oct->hw_ops.disable_oq = octep_vf_disable_oq_cn93;
+ oct->hw_ops.disable_io_queues = octep_vf_disable_io_queues_cn93;
+ oct->hw_ops.reset_io_queues = octep_vf_reset_io_queues_cn93;
+
+ oct->hw_ops.dump_registers = octep_vf_dump_registers_cn93;
+ octep_vf_init_config_cn93_vf(oct);
+}
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c
new file mode 100644
index 000000000000..af07a4a6edc5
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+#include "octep_vf_regs_cnxk.h"
+
+/* Reset all hardware Tx/Rx queues */
+static void octep_vf_reset_io_queues_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Initialize configuration limits and initial active config */
+static void octep_vf_init_config_cnxk_vf(struct octep_vf_device *oct)
+{
+ struct octep_vf_config *conf = oct->conf;
+ u64 reg_val;
+
+ reg_val = octep_vf_read_csr64(oct, CNXK_VF_SDP_R_IN_CONTROL(0));
+ conf->ring_cfg.max_io_rings = (reg_val >> CNXK_VF_R_IN_CTL_RPVF_POS) &
+ CNXK_VF_R_IN_CTL_RPVF_MASK;
+ conf->ring_cfg.active_io_rings = conf->ring_cfg.max_io_rings;
+
+ conf->iq.num_descs = OCTEP_VF_IQ_MAX_DESCRIPTORS;
+ conf->iq.instr_type = OCTEP_VF_64BYTE_INSTR;
+ conf->iq.db_min = OCTEP_VF_DB_MIN;
+ conf->iq.intr_threshold = OCTEP_VF_IQ_INTR_THRESHOLD;
+
+ conf->oq.num_descs = OCTEP_VF_OQ_MAX_DESCRIPTORS;
+ conf->oq.buf_size = OCTEP_VF_OQ_BUF_SIZE;
+ conf->oq.refill_threshold = OCTEP_VF_OQ_REFILL_THRESHOLD;
+ conf->oq.oq_intr_pkt = OCTEP_VF_OQ_INTR_PKT_THRESHOLD;
+ conf->oq.oq_intr_time = OCTEP_VF_OQ_INTR_TIME_THRESHOLD;
+ conf->oq.wmark = OCTEP_VF_OQ_WMARK_MIN;
+
+ conf->msix_cfg.ioq_msix = conf->ring_cfg.active_io_rings;
+}
+
+/* Setup registers for a hardware Tx Queue */
+static void octep_vf_setup_iq_regs_cnxk(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Setup registers for a hardware Rx Queue */
+static void octep_vf_setup_oq_regs_cnxk(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Setup registers for a VF mailbox */
+static void octep_vf_setup_mbox_regs_cnxk(struct octep_vf_device *oct, int q_no)
+{
+}
+
+/* Tx/Rx queue interrupt handler */
+static irqreturn_t octep_vf_ioq_intr_handler_cnxk(void *data)
+{
+ return IRQ_HANDLED;
+}
+
+/* Re-initialize Octeon hardware registers */
+static void octep_vf_reinit_regs_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Enable all interrupts */
+static void octep_vf_enable_interrupts_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Disable all interrupts */
+static void octep_vf_disable_interrupts_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Get new Octeon Read Index: index of descriptor that Octeon reads next. */
+static u32 octep_vf_update_iq_read_index_cnxk(struct octep_vf_iq *iq)
+{
+ return 0;
+}
+
+/* Enable a hardware Tx Queue */
+static void octep_vf_enable_iq_cnxk(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Enable a hardware Rx Queue */
+static void octep_vf_enable_oq_cnxk(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Enable all hardware Tx/Rx Queues assigned to VF */
+static void octep_vf_enable_io_queues_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Disable a hardware Tx Queue assigned to VF */
+static void octep_vf_disable_iq_cnxk(struct octep_vf_device *oct, int iq_no)
+{
+}
+
+/* Disable a hardware Rx Queue assigned to VF */
+static void octep_vf_disable_oq_cnxk(struct octep_vf_device *oct, int oq_no)
+{
+}
+
+/* Disable all hardware Tx/Rx Queues assigned to VF */
+static void octep_vf_disable_io_queues_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/* Dump hardware registers (including Tx/Rx queues) for debugging. */
+static void octep_vf_dump_registers_cnxk(struct octep_vf_device *oct)
+{
+}
+
+/**
+ * octep_vf_device_setup_cnxk() - Setup Octeon device.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * - initialize hardware operations.
+ * - get target side pcie port number for the device.
+ * - set initial configuration and max limits.
+ */
+void octep_vf_device_setup_cnxk(struct octep_vf_device *oct)
+{
+ oct->hw_ops.setup_iq_regs = octep_vf_setup_iq_regs_cnxk;
+ oct->hw_ops.setup_oq_regs = octep_vf_setup_oq_regs_cnxk;
+ oct->hw_ops.setup_mbox_regs = octep_vf_setup_mbox_regs_cnxk;
+
+ oct->hw_ops.ioq_intr_handler = octep_vf_ioq_intr_handler_cnxk;
+ oct->hw_ops.reinit_regs = octep_vf_reinit_regs_cnxk;
+
+ oct->hw_ops.enable_interrupts = octep_vf_enable_interrupts_cnxk;
+ oct->hw_ops.disable_interrupts = octep_vf_disable_interrupts_cnxk;
+
+ oct->hw_ops.update_iq_read_idx = octep_vf_update_iq_read_index_cnxk;
+
+ oct->hw_ops.enable_iq = octep_vf_enable_iq_cnxk;
+ oct->hw_ops.enable_oq = octep_vf_enable_oq_cnxk;
+ oct->hw_ops.enable_io_queues = octep_vf_enable_io_queues_cnxk;
+
+ oct->hw_ops.disable_iq = octep_vf_disable_iq_cnxk;
+ oct->hw_ops.disable_oq = octep_vf_disable_oq_cnxk;
+ oct->hw_ops.disable_io_queues = octep_vf_disable_io_queues_cnxk;
+ oct->hw_ops.reset_io_queues = octep_vf_reset_io_queues_cnxk;
+
+ oct->hw_ops.dump_registers = octep_vf_dump_registers_cnxk;
+ octep_vf_init_config_cnxk_vf(oct);
+}
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_config.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_config.h
new file mode 100644
index 000000000000..e03a647b0110
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_config.h
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#ifndef _OCTEP_VF_CONFIG_H_
+#define _OCTEP_VF_CONFIG_H_
+
+/* Tx instruction types by length */
+#define OCTEP_VF_32BYTE_INSTR 32
+#define OCTEP_VF_64BYTE_INSTR 64
+
+/* Tx Queue: maximum descriptors per ring */
+#define OCTEP_VF_IQ_MAX_DESCRIPTORS 1024
+/* Minimum input (Tx) requests to be enqueued to ring doorbell */
+#define OCTEP_VF_DB_MIN 8
+/* Packet threshold for Tx queue interrupt */
+#define OCTEP_VF_IQ_INTR_THRESHOLD 0x0
+
+/* Minimum watermark for backpressure */
+#define OCTEP_VF_OQ_WMARK_MIN 256
+
+/* Rx Queue: maximum descriptors per ring */
+#define OCTEP_VF_OQ_MAX_DESCRIPTORS 1024
+
+/* Rx buffer size: Use page size buffers.
+ * Build skb from allocated page buffer once the packet is received.
+ * When a gathered packet is received, make head page as skb head and
+ * page buffers in consecutive Rx descriptors as fragments.
+ */
+#define OCTEP_VF_OQ_BUF_SIZE (SKB_WITH_OVERHEAD(PAGE_SIZE))
+#define OCTEP_VF_OQ_PKTS_PER_INTR 128
+#define OCTEP_VF_OQ_REFILL_THRESHOLD (OCTEP_VF_OQ_MAX_DESCRIPTORS / 4)
+
+#define OCTEP_VF_OQ_INTR_PKT_THRESHOLD 1
+#define OCTEP_VF_OQ_INTR_TIME_THRESHOLD 10
+
+#define OCTEP_VF_MSIX_NAME_SIZE (IFNAMSIZ + 32)
+
+/* Tx Queue wake threshold
+ * wakeup a stopped Tx queue if minimum 2 descriptors are available.
+ * Even a skb with fragments consume only one Tx queue descriptor entry.
+ */
+#define OCTEP_VF_WAKE_QUEUE_THRESHOLD 2
+
+/* Minimum MTU supported by Octeon network interface */
+#define OCTEP_VF_MIN_MTU ETH_MIN_MTU
+/* Maximum MTU supported by Octeon interface*/
+#define OCTEP_VF_MAX_MTU (10000 - (ETH_HLEN + ETH_FCS_LEN))
+/* Default MTU */
+#define OCTEP_VF_DEFAULT_MTU 1500
+
+/* Macros to get octeon config params */
+#define CFG_GET_IQ_CFG(cfg) ((cfg)->iq)
+#define CFG_GET_IQ_NUM_DESC(cfg) ((cfg)->iq.num_descs)
+#define CFG_GET_IQ_INSTR_TYPE(cfg) ((cfg)->iq.instr_type)
+#define CFG_GET_IQ_INSTR_SIZE(cfg) (64)
+#define CFG_GET_IQ_DB_MIN(cfg) ((cfg)->iq.db_min)
+#define CFG_GET_IQ_INTR_THRESHOLD(cfg) ((cfg)->iq.intr_threshold)
+
+#define CFG_GET_OQ_NUM_DESC(cfg) ((cfg)->oq.num_descs)
+#define CFG_GET_OQ_BUF_SIZE(cfg) ((cfg)->oq.buf_size)
+#define CFG_GET_OQ_REFILL_THRESHOLD(cfg) ((cfg)->oq.refill_threshold)
+#define CFG_GET_OQ_INTR_PKT(cfg) ((cfg)->oq.oq_intr_pkt)
+#define CFG_GET_OQ_INTR_TIME(cfg) ((cfg)->oq.oq_intr_time)
+#define CFG_GET_OQ_WMARK(cfg) ((cfg)->oq.wmark)
+
+#define CFG_GET_PORTS_ACTIVE_IO_RINGS(cfg) ((cfg)->ring_cfg.active_io_rings)
+#define CFG_GET_PORTS_MAX_IO_RINGS(cfg) ((cfg)->ring_cfg.max_io_rings)
+
+#define CFG_GET_CORE_TICS_PER_US(cfg) ((cfg)->core_cfg.core_tics_per_us)
+#define CFG_GET_COPROC_TICS_PER_US(cfg) ((cfg)->core_cfg.coproc_tics_per_us)
+
+#define CFG_GET_IOQ_MSIX(cfg) ((cfg)->msix_cfg.ioq_msix)
+
+/* Hardware Tx Queue configuration. */
+struct octep_vf_iq_config {
+ /* Size of the Input queue (number of commands) */
+ u16 num_descs;
+
+ /* Command size - 32 or 64 bytes */
+ u16 instr_type;
+
+ /* Minimum number of commands pending to be posted to Octeon before driver
+ * hits the Input queue doorbell.
+ */
+ u16 db_min;
+
+ /* Trigger the IQ interrupt when processed cmd count reaches
+ * this level.
+ */
+ u32 intr_threshold;
+};
+
+/* Hardware Rx Queue configuration. */
+struct octep_vf_oq_config {
+ /* Size of Output queue (number of descriptors) */
+ u16 num_descs;
+
+ /* Size of buffer in this Output queue. */
+ u16 buf_size;
+
+ /* The number of buffers that were consumed during packet processing
+ * by the driver on this Output queue before the driver attempts to
+ * replenish the descriptor ring with new buffers.
+ */
+ u16 refill_threshold;
+
+ /* Interrupt Coalescing (Packet Count). Octeon will interrupt the host
+ * only if it sent as many packets as specified by this field.
+ * The driver usually does not use packet count interrupt coalescing.
+ */
+ u32 oq_intr_pkt;
+
+ /* Interrupt Coalescing (Time Interval). Octeon will interrupt the host
+ * if at least one packet was sent in the time interval specified by
+ * this field. The driver uses time interval interrupt coalescing by
+ * default. The time is specified in microseconds.
+ */
+ u32 oq_intr_time;
+
+ /* Water mark for backpressure.
+ * Output queue sends backpressure signal to source when
+ * free buffer count falls below wmark.
+ */
+ u32 wmark;
+};
+
+/* Tx/Rx configuration */
+struct octep_vf_ring_config {
+ /* Max number of IOQs */
+ u16 max_io_rings;
+
+ /* Number of active IOQs */
+ u16 active_io_rings;
+};
+
+/* Octeon MSI-x config. */
+struct octep_vf_msix_config {
+ /* Number of IOQ interrupts */
+ u16 ioq_msix;
+};
+
+/* Data Structure to hold configuration limits and active config */
+struct octep_vf_config {
+ /* Input Queue attributes. */
+ struct octep_vf_iq_config iq;
+
+ /* Output Queue attributes. */
+ struct octep_vf_oq_config oq;
+
+ /* MSI-X interrupt config */
+ struct octep_vf_msix_config msix_cfg;
+
+ /* NIC VF ring Configuration */
+ struct octep_vf_ring_config ring_cfg;
+};
+#endif /* _OCTEP_VF_CONFIG_H_ */
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
new file mode 100644
index 000000000000..2ade88698f65
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
@@ -0,0 +1,516 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/vmalloc.h>
+
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+
+struct workqueue_struct *octep_vf_wq;
+
+/* Supported Devices */
+static const struct pci_device_id octep_vf_pci_id_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN93_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF95N_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN98_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KA_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KA_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KB_VF)},
+ {PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KB_VF)},
+ {0, },
+};
+MODULE_DEVICE_TABLE(pci, octep_vf_pci_id_tbl);
+
+MODULE_AUTHOR("Veerasenareddy Burru <vburru@xxxxxxxxxxx>");
+MODULE_DESCRIPTION(OCTEP_VF_DRV_STRING);
+MODULE_LICENSE("GPL");
+
+static void octep_vf_link_up(struct net_device *netdev)
+{
+ netif_carrier_on(netdev);
+ netif_tx_start_all_queues(netdev);
+}
+
+static void octep_vf_set_rx_state(struct octep_vf_device *oct, bool up)
+{
+ int err;
+
+ err = octep_vf_mbox_set_rx_state(oct, up);
+ if (err)
+ netdev_err(oct->netdev, "Set Rx state to %d failed with err:%d\n", up, err);
+}
+
+static int octep_vf_get_link_status(struct octep_vf_device *oct)
+{
+ int err;
+
+ err = octep_vf_mbox_get_link_status(oct, &oct->link_info.oper_up);
+ if (err)
+ netdev_err(oct->netdev, "Get link status failed with err:%d\n", err);
+ return oct->link_info.oper_up;
+}
+
+static void octep_vf_set_link_status(struct octep_vf_device *oct, bool up)
+{
+ int err;
+
+ err = octep_vf_mbox_set_link_status(oct, up);
+ if (err) {
+ netdev_err(oct->netdev, "Set link status to %d failed with err:%d\n", up, err);
+ return;
+ }
+ oct->link_info.oper_up = up;
+}
+
+/**
+ * octep_vf_open() - start the octeon network device.
+ *
+ * @netdev: pointer to kernel network device.
+ *
+ * setup Tx/Rx queues, interrupts and enable hardware operation of Tx/Rx queues
+ * and interrupts..
+ *
+ * Return: 0, on successfully setting up device and bring it up.
+ * -1, on any error.
+ */
+static int octep_vf_open(struct net_device *netdev)
+{
+ struct octep_vf_device *oct = netdev_priv(netdev);
+ int err, ret;
+
+ netdev_info(netdev, "Starting netdev ...\n");
+ netif_carrier_off(netdev);
+
+ oct->hw_ops.reset_io_queues(oct);
+
+ if (octep_vf_setup_iqs(oct))
+ goto setup_iq_err;
+ if (octep_vf_setup_oqs(oct))
+ goto setup_oq_err;
+
+ err = netif_set_real_num_tx_queues(netdev, oct->num_oqs);
+ if (err)
+ goto set_queues_err;
+ err = netif_set_real_num_rx_queues(netdev, oct->num_iqs);
+ if (err)
+ goto set_queues_err;
+
+ oct->link_info.admin_up = 1;
+ octep_vf_set_rx_state(oct, true);
+
+ ret = octep_vf_get_link_status(oct);
+ if (!ret)
+ octep_vf_set_link_status(oct, true);
+
+ /* Enable the input and output queues for this Octeon device */
+ oct->hw_ops.enable_io_queues(oct);
+
+ /* Enable Octeon device interrupts */
+ oct->hw_ops.enable_interrupts(oct);
+
+ octep_vf_oq_dbell_init(oct);
+
+ ret = octep_vf_get_link_status(oct);
+ if (ret)
+ octep_vf_link_up(netdev);
+
+ return 0;
+
+set_queues_err:
+ octep_vf_free_oqs(oct);
+setup_oq_err:
+ octep_vf_free_iqs(oct);
+setup_iq_err:
+ return -1;
+}
+
+/**
+ * octep_vf_stop() - stop the octeon network device.
+ *
+ * @netdev: pointer to kernel network device.
+ *
+ * stop the device Tx/Rx operations, bring down the link and
+ * free up all resources allocated for Tx/Rx queues and interrupts.
+ */
+static int octep_vf_stop(struct net_device *netdev)
+{
+ struct octep_vf_device *oct = netdev_priv(netdev);
+
+ netdev_info(netdev, "Stopping the device ...\n");
+
+ /* Stop Tx from stack */
+ netif_carrier_off(netdev);
+ netif_tx_disable(netdev);
+
+ octep_vf_set_link_status(oct, false);
+ octep_vf_set_rx_state(oct, false);
+
+ oct->link_info.admin_up = 0;
+ oct->link_info.oper_up = 0;
+
+ oct->hw_ops.disable_interrupts(oct);
+
+ octep_vf_clean_iqs(oct);
+
+ oct->hw_ops.disable_io_queues(oct);
+ oct->hw_ops.reset_io_queues(oct);
+ octep_vf_free_oqs(oct);
+ octep_vf_free_iqs(oct);
+ netdev_info(netdev, "Device stopped !!\n");
+ return 0;
+}
+
+/**
+ * octep_vf_start_xmit() - Enqueue packet to Octoen hardware Tx Queue.
+ *
+ * @skb: packet skbuff pointer.
+ * @netdev: kernel network device.
+ *
+ * Return: NETDEV_TX_BUSY, if Tx Queue is full.
+ * NETDEV_TX_OK, if successfully enqueued to hardware Tx queue.
+ */
+static netdev_tx_t octep_vf_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ return NETDEV_TX_OK;
+}
+
+/**
+ * octep_vf_tx_timeout_task - work queue task to Handle Tx queue timeout.
+ *
+ * @work: pointer to Tx queue timeout work_struct
+ *
+ * Stop and start the device so that it frees up all queue resources
+ * and restarts the queues, that potentially clears a Tx queue timeout
+ * condition.
+ **/
+static void octep_vf_tx_timeout_task(struct work_struct *work)
+{
+ struct octep_vf_device *oct = container_of(work, struct octep_vf_device,
+ tx_timeout_task);
+ struct net_device *netdev = oct->netdev;
+
+ rtnl_lock();
+ if (netif_running(netdev)) {
+ octep_vf_stop(netdev);
+ octep_vf_open(netdev);
+ }
+ rtnl_unlock();
+ netdev_put(netdev, NULL);
+}
+
+/**
+ * octep_vf_tx_timeout() - Handle Tx Queue timeout.
+ *
+ * @netdev: pointer to kernel network device.
+ * @txqueue: Timed out Tx queue number.
+ *
+ * Schedule a work to handle Tx queue timeout.
+ */
+static void octep_vf_tx_timeout(struct net_device *netdev, unsigned int txqueue)
+{
+ struct octep_vf_device *oct = netdev_priv(netdev);
+
+ netdev_hold(netdev, NULL, GFP_ATOMIC);
+ schedule_work(&oct->tx_timeout_task);
+}
+
+static const struct net_device_ops octep_vf_netdev_ops = {
+ .ndo_open = octep_vf_open,
+ .ndo_stop = octep_vf_stop,
+ .ndo_start_xmit = octep_vf_start_xmit,
+ .ndo_tx_timeout = octep_vf_tx_timeout,
+};
+
+static const char *octep_vf_devid_to_str(struct octep_vf_device *oct)
+{
+ switch (oct->chip_id) {
+ case OCTEP_PCI_DEVICE_ID_CN93_VF:
+ return "CN93XX";
+ case OCTEP_PCI_DEVICE_ID_CNF95N_VF:
+ return "CNF95N";
+ case OCTEP_PCI_DEVICE_ID_CN10KA_VF:
+ return "CN10KA";
+ case OCTEP_PCI_DEVICE_ID_CNF10KA_VF:
+ return "CNF10KA";
+ case OCTEP_PCI_DEVICE_ID_CNF10KB_VF:
+ return "CNF10KB";
+ case OCTEP_PCI_DEVICE_ID_CN10KB_VF:
+ return "CN10KB";
+ default:
+ return "Unsupported";
+ }
+}
+
+/**
+ * octep_vf_device_setup() - Setup Octeon Device.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * Setup Octeon device hardware operations, configuration, etc ...
+ */
+int octep_vf_device_setup(struct octep_vf_device *oct)
+{
+ struct pci_dev *pdev = oct->pdev;
+
+ /* allocate memory for oct->conf */
+ oct->conf = kzalloc(sizeof(*oct->conf), GFP_KERNEL);
+ if (!oct->conf)
+ return -ENOMEM;
+
+ /* Map BAR region 0 */
+ oct->mmio.hw_addr = ioremap(pci_resource_start(oct->pdev, 0),
+ pci_resource_len(oct->pdev, 0));
+ if (!oct->mmio.hw_addr) {
+ dev_err(&pdev->dev,
+ "Failed to remap BAR0; start=0x%llx len=0x%llx\n",
+ pci_resource_start(oct->pdev, 0),
+ pci_resource_len(oct->pdev, 0));
+ goto ioremap_err;
+ }
+ oct->mmio.mapped = 1;
+
+ oct->chip_id = pdev->device;
+ oct->rev_id = pdev->revision;
+ dev_info(&pdev->dev, "chip_id = 0x%x\n", pdev->device);
+
+ switch (oct->chip_id) {
+ case OCTEP_PCI_DEVICE_ID_CN93_VF:
+ case OCTEP_PCI_DEVICE_ID_CNF95N_VF:
+ case OCTEP_PCI_DEVICE_ID_CN98_VF:
+ dev_info(&pdev->dev, "Setting up OCTEON %s VF PASS%d.%d\n",
+ octep_vf_devid_to_str(oct), OCTEP_VF_MAJOR_REV(oct),
+ OCTEP_VF_MINOR_REV(oct));
+ octep_vf_device_setup_cn93(oct);
+ break;
+ case OCTEP_PCI_DEVICE_ID_CNF10KA_VF:
+ case OCTEP_PCI_DEVICE_ID_CN10KA_VF:
+ case OCTEP_PCI_DEVICE_ID_CNF10KB_VF:
+ case OCTEP_PCI_DEVICE_ID_CN10KB_VF:
+ dev_info(&pdev->dev, "Setting up OCTEON %s VF PASS%d.%d\n",
+ octep_vf_devid_to_str(oct), OCTEP_VF_MAJOR_REV(oct),
+ OCTEP_VF_MINOR_REV(oct));
+ octep_vf_device_setup_cnxk(oct);
+ break;
+ default:
+ dev_err(&pdev->dev, "Unsupported device\n");
+ goto unsupported_dev;
+ }
+
+ return 0;
+
+unsupported_dev:
+ iounmap(oct->mmio.hw_addr);
+ioremap_err:
+ kfree(oct->conf);
+ return -EOPNOTSUPP;
+}
+
+/**
+ * octep_vf_device_cleanup() - Cleanup Octeon Device.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * Cleanup Octeon device allocated resources.
+ */
+static void octep_vf_device_cleanup(struct octep_vf_device *oct)
+{
+ dev_info(&oct->pdev->dev, "Cleaning up Octeon Device ...\n");
+
+ if (oct->mmio.mapped)
+ iounmap(oct->mmio.hw_addr);
+
+ kfree(oct->conf);
+ oct->conf = NULL;
+}
+
+static int octep_vf_get_mac_addr(struct octep_vf_device *oct, u8 *addr)
+{
+ return octep_vf_mbox_get_mac_addr(oct, addr);
+}
+
+/**
+ * octep_vf_probe() - Octeon PCI device probe handler.
+ *
+ * @pdev: PCI device structure.
+ * @ent: entry in Octeon PCI device ID table.
+ *
+ * Initializes and enables the Octeon PCI device for network operations.
+ * Initializes Octeon private data structure and registers a network device.
+ */
+static int octep_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct octep_vf_device *octep_vf_dev;
+ struct net_device *netdev;
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to enable PCI device\n");
+ return err;
+ }
+
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (err) {
+ dev_err(&pdev->dev, "Failed to set DMA mask !!\n");
+ goto disable_pci_device;
+ }
+
+ err = pci_request_mem_regions(pdev, OCTEP_VF_DRV_NAME);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to map PCI memory regions\n");
+ goto disable_pci_device;
+ }
+
+ pci_set_master(pdev);
+
+ netdev = alloc_etherdev_mq(sizeof(struct octep_vf_device),
+ OCTEP_VF_MAX_QUEUES);
+ if (!netdev) {
+ dev_err(&pdev->dev, "Failed to allocate netdev\n");
+ err = -ENOMEM;
+ goto mem_regions_release;
+ }
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ octep_vf_dev = netdev_priv(netdev);
+ octep_vf_dev->netdev = netdev;
+ octep_vf_dev->pdev = pdev;
+ octep_vf_dev->dev = &pdev->dev;
+ pci_set_drvdata(pdev, octep_vf_dev);
+
+ err = octep_vf_device_setup(octep_vf_dev);
+ if (err) {
+ dev_err(&pdev->dev, "Device setup failed\n");
+ goto netdevice_free;
+ }
+ INIT_WORK(&octep_vf_dev->tx_timeout_task, octep_vf_tx_timeout_task);
+
+ netdev->netdev_ops = &octep_vf_netdev_ops;
+ netif_carrier_off(netdev);
+
+ if (octep_vf_setup_mbox(octep_vf_dev)) {
+ dev_err(&pdev->dev, "VF Mailbox setup failed\n");
+ err = -ENOMEM;
+ goto device_cleanup;
+ }
+
+ if (octep_vf_mbox_version_check(octep_vf_dev)) {
+ dev_err(&pdev->dev, "PF VF Mailbox version mismatch\n");
+ err = -EINVAL;
+ goto delete_mbox;
+ }
+
+ netdev->hw_features = NETIF_F_SG;
+ netdev->min_mtu = OCTEP_VF_MIN_MTU;
+ netdev->max_mtu = OCTEP_VF_MAX_MTU;
+ netdev->mtu = OCTEP_VF_DEFAULT_MTU;
+
+ netdev->features |= netdev->hw_features;
+ octep_vf_get_mac_addr(octep_vf_dev, octep_vf_dev->mac_addr);
+ eth_hw_addr_set(netdev, octep_vf_dev->mac_addr);
+ err = register_netdev(netdev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register netdev\n");
+ goto delete_mbox;
+ }
+ dev_info(&pdev->dev, "Device probe successful\n");
+ return 0;
+
+delete_mbox:
+ octep_vf_delete_mbox(octep_vf_dev);
+device_cleanup:
+ octep_vf_device_cleanup(octep_vf_dev);
+netdevice_free:
+ free_netdev(netdev);
+mem_regions_release:
+ pci_release_mem_regions(pdev);
+disable_pci_device:
+ pci_disable_device(pdev);
+ dev_err(&pdev->dev, "Device probe failed\n");
+ return err;
+}
+
+/**
+ * octep_vf_remove() - Remove Octeon PCI device from driver control.
+ *
+ * @pdev: PCI device structure of the Octeon device.
+ *
+ * Cleanup all resources allocated for the Octeon device.
+ * Unregister from network device and disable the PCI device.
+ */
+static void octep_vf_remove(struct pci_dev *pdev)
+{
+ struct octep_vf_device *oct = pci_get_drvdata(pdev);
+ struct net_device *netdev;
+
+ if (!oct)
+ return;
+
+ octep_vf_mbox_dev_remove(oct);
+ cancel_work_sync(&oct->tx_timeout_task);
+ netdev = oct->netdev;
+ if (netdev->reg_state == NETREG_REGISTERED)
+ unregister_netdev(netdev);
+ octep_vf_delete_mbox(oct);
+ octep_vf_device_cleanup(oct);
+ pci_release_mem_regions(pdev);
+ free_netdev(netdev);
+ pci_disable_device(pdev);
+}
+
+static struct pci_driver octep_vf_driver = {
+ .name = OCTEP_VF_DRV_NAME,
+ .id_table = octep_vf_pci_id_tbl,
+ .probe = octep_vf_probe,
+ .remove = octep_vf_remove,
+};
+
+/**
+ * octep_vf_init_module() - Module initialization.
+ *
+ * create common resource for the driver and register PCI driver.
+ */
+static int __init octep_vf_init_module(void)
+{
+ int ret;
+
+ pr_info("%s: Loading %s ...\n", OCTEP_VF_DRV_NAME, OCTEP_VF_DRV_STRING);
+
+ ret = pci_register_driver(&octep_vf_driver);
+ if (ret < 0) {
+ pr_err("%s: Failed to register PCI driver; err=%d\n",
+ OCTEP_VF_DRV_NAME, ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+/**
+ * octep_vf_exit_module() - Module exit routine.
+ *
+ * unregister the driver with PCI subsystem and cleanup common resources.
+ */
+static void __exit octep_vf_exit_module(void)
+{
+ pr_info("%s: Unloading ...\n", OCTEP_VF_DRV_NAME);
+
+ pci_unregister_driver(&octep_vf_driver);
+
+ pr_info("%s: Unloading complete\n", OCTEP_VF_DRV_NAME);
+}
+
+module_init(octep_vf_init_module);
+module_exit(octep_vf_exit_module);
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h
new file mode 100644
index 000000000000..4359e0e585ec
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h
@@ -0,0 +1,331 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#ifndef _OCTEP_VF_MAIN_H_
+#define _OCTEP_VF_MAIN_H_
+
+#include "octep_vf_tx.h"
+#include "octep_vf_rx.h"
+#include "octep_vf_mbox.h"
+
+#define OCTEP_VF_DRV_NAME "octeon_ep_vf"
+#define OCTEP_VF_DRV_STRING "Marvell Octeon EndPoint NIC VF Driver"
+
+#define OCTEP_PCI_DEVICE_ID_CN93_VF 0xB203 //93xx VF
+#define OCTEP_PCI_DEVICE_ID_CNF95N_VF 0xB403 //95N VF
+#define OCTEP_PCI_DEVICE_ID_CN98_VF 0xB103
+#define OCTEP_PCI_DEVICE_ID_CN10KA_VF 0xB903
+#define OCTEP_PCI_DEVICE_ID_CNF10KA_VF 0xBA03
+#define OCTEP_PCI_DEVICE_ID_CNF10KB_VF 0xBC03
+#define OCTEP_PCI_DEVICE_ID_CN10KB_VF 0xBD03
+
+#define OCTEP_VF_MAX_QUEUES 63
+#define OCTEP_VF_MAX_IQ OCTEP_VF_MAX_QUEUES
+#define OCTEP_VF_MAX_OQ OCTEP_VF_MAX_QUEUES
+
+#define OCTEP_VF_MAX_MSIX_VECTORS OCTEP_VF_MAX_OQ
+
+#define OCTEP_VF_IQ_INTR_RESEND_BIT 59
+#define OCTEP_VF_OQ_INTR_RESEND_BIT 59
+
+#define IQ_INSTR_PENDING(iq) ({ typeof(iq) iq__ = (iq); \
+ ((iq__)->host_write_index - (iq__)->flush_index) & \
+ (iq__)->ring_size_mask; \
+ })
+#define IQ_INSTR_SPACE(iq) ({ typeof(iq) iq_ = (iq); \
+ (iq_)->max_count - IQ_INSTR_PENDING(iq_); \
+ })
+
+/* PCI address space mapping information.
+ * Each of the 3 address spaces given by BAR0, BAR2 and BAR4 of
+ * Octeon gets mapped to different physical address spaces in
+ * the kernel.
+ */
+struct octep_vf_mmio {
+ /* The physical address to which the PCI address space is mapped. */
+ u8 __iomem *hw_addr;
+
+ /* Flag indicating the mapping was successful. */
+ int mapped;
+};
+
+struct octep_vf_hw_ops {
+ void (*setup_iq_regs)(struct octep_vf_device *oct, int q);
+ void (*setup_oq_regs)(struct octep_vf_device *oct, int q);
+ void (*setup_mbox_regs)(struct octep_vf_device *oct, int mbox);
+
+ irqreturn_t (*non_ioq_intr_handler)(void *ioq_vector);
+ irqreturn_t (*ioq_intr_handler)(void *ioq_vector);
+ void (*reinit_regs)(struct octep_vf_device *oct);
+ u32 (*update_iq_read_idx)(struct octep_vf_iq *iq);
+
+ void (*enable_interrupts)(struct octep_vf_device *oct);
+ void (*disable_interrupts)(struct octep_vf_device *oct);
+
+ void (*enable_io_queues)(struct octep_vf_device *oct);
+ void (*disable_io_queues)(struct octep_vf_device *oct);
+ void (*enable_iq)(struct octep_vf_device *oct, int q);
+ void (*disable_iq)(struct octep_vf_device *oct, int q);
+ void (*enable_oq)(struct octep_vf_device *oct, int q);
+ void (*disable_oq)(struct octep_vf_device *oct, int q);
+ void (*reset_io_queues)(struct octep_vf_device *oct);
+ void (*dump_registers)(struct octep_vf_device *oct);
+};
+
+/* Octeon mailbox data */
+struct octep_vf_mbox_data {
+ /* Holds the offset of received data via mailbox. */
+ u32 data_index;
+
+ /* Holds the received data via mailbox. */
+ u8 recv_data[OCTEP_PFVF_MBOX_MAX_DATA_BUF_SIZE];
+};
+
+/* wrappers around work structs */
+struct octep_vf_mbox_wk {
+ struct work_struct work;
+ void *ctxptr;
+};
+
+/* Octeon device mailbox */
+struct octep_vf_mbox {
+ /* A mutex to protect access to this q_mbox. */
+ struct mutex lock;
+
+ u32 state;
+
+ /* SLI_MAC_PF_MBOX_INT for PF, SLI_PKT_MBOX_INT for VF. */
+ u8 __iomem *mbox_int_reg;
+
+ /* SLI_PKT_PF_VF_MBOX_SIG(0) for PF,
+ * SLI_PKT_PF_VF_MBOX_SIG(1) for VF.
+ */
+ u8 __iomem *mbox_write_reg;
+
+ /* SLI_PKT_PF_VF_MBOX_SIG(1) for PF,
+ * SLI_PKT_PF_VF_MBOX_SIG(0) for VF.
+ */
+ u8 __iomem *mbox_read_reg;
+
+ /* Octeon mailbox data */
+ struct octep_vf_mbox_data mbox_data;
+
+ /* Octeon mailbox work handler to process Mbox messages */
+ struct octep_vf_mbox_wk wk;
+};
+
+/* Tx/Rx queue vector per interrupt. */
+struct octep_vf_ioq_vector {
+ char name[OCTEP_VF_MSIX_NAME_SIZE];
+ struct napi_struct napi;
+ struct octep_vf_device *octep_vf_dev;
+ struct octep_vf_iq *iq;
+ struct octep_vf_oq *oq;
+ cpumask_t affinity_mask;
+};
+
+/* Octeon hardware/firmware offload capability flags. */
+#define OCTEP_VF_CAP_TX_CHECKSUM BIT(0)
+#define OCTEP_VF_CAP_RX_CHECKSUM BIT(1)
+#define OCTEP_VF_CAP_TSO BIT(2)
+
+/* Link modes */
+enum octep_vf_link_mode_bit_indices {
+ OCTEP_VF_LINK_MODE_10GBASE_T = 0,
+ OCTEP_VF_LINK_MODE_10GBASE_R,
+ OCTEP_VF_LINK_MODE_10GBASE_CR,
+ OCTEP_VF_LINK_MODE_10GBASE_KR,
+ OCTEP_VF_LINK_MODE_10GBASE_LR,
+ OCTEP_VF_LINK_MODE_10GBASE_SR,
+ OCTEP_VF_LINK_MODE_25GBASE_CR,
+ OCTEP_VF_LINK_MODE_25GBASE_KR,
+ OCTEP_VF_LINK_MODE_25GBASE_SR,
+ OCTEP_VF_LINK_MODE_40GBASE_CR4,
+ OCTEP_VF_LINK_MODE_40GBASE_KR4,
+ OCTEP_VF_LINK_MODE_40GBASE_LR4,
+ OCTEP_VF_LINK_MODE_40GBASE_SR4,
+ OCTEP_VF_LINK_MODE_50GBASE_CR2,
+ OCTEP_VF_LINK_MODE_50GBASE_KR2,
+ OCTEP_VF_LINK_MODE_50GBASE_SR2,
+ OCTEP_VF_LINK_MODE_50GBASE_CR,
+ OCTEP_VF_LINK_MODE_50GBASE_KR,
+ OCTEP_VF_LINK_MODE_50GBASE_LR,
+ OCTEP_VF_LINK_MODE_50GBASE_SR,
+ OCTEP_VF_LINK_MODE_100GBASE_CR4,
+ OCTEP_VF_LINK_MODE_100GBASE_KR4,
+ OCTEP_VF_LINK_MODE_100GBASE_LR4,
+ OCTEP_VF_LINK_MODE_100GBASE_SR4,
+ OCTEP_VF_LINK_MODE_NBITS
+};
+
+/* Hardware interface link state information. */
+struct octep_vf_iface_link_info {
+ /* Bitmap of Supported link speeds/modes. */
+ u64 supported_modes;
+
+ /* Bitmap of Advertised link speeds/modes. */
+ u64 advertised_modes;
+
+ /* Negotiated link speed in Mbps. */
+ u32 speed;
+
+ /* MTU */
+ u16 mtu;
+
+ /* Autonegotiation state. */
+#define OCTEP_VF_LINK_MODE_AUTONEG_SUPPORTED BIT(0)
+#define OCTEP_VF_LINK_MODE_AUTONEG_ADVERTISED BIT(1)
+ u8 autoneg;
+
+ /* Pause frames setting. */
+#define OCTEP_VF_LINK_MODE_PAUSE_SUPPORTED BIT(0)
+#define OCTEP_VF_LINK_MODE_PAUSE_ADVERTISED BIT(1)
+ u8 pause;
+
+ /* Admin state of the link (ifconfig <iface> up/down */
+ u8 admin_up;
+
+ /* Operational state of the link: physical link is up down */
+ u8 oper_up;
+};
+
+/* Hardware interface stats information. */
+struct octep_vf_iface_rxtx_stats {
+ /* Hardware Interface Rx statistics */
+ struct octep_vf_iface_rx_stats iface_rx_stats;
+
+ /* Hardware Interface Tx statistics */
+ struct octep_vf_iface_tx_stats iface_tx_stats;
+};
+
+struct octep_vf_fw_info {
+ /* pkind value to be used in every Tx hardware descriptor */
+ u8 pkind;
+ /* front size data */
+ u8 fsz;
+ /* supported rx offloads OCTEP_VF_RX_OFFLOAD_* */
+ u16 rx_ol_flags;
+ /* supported tx offloads OCTEP_VF_TX_OFFLOAD_* */
+ u16 tx_ol_flags;
+};
+
+/* The Octeon device specific private data structure.
+ * Each Octeon device has this structure to represent all its components.
+ */
+struct octep_vf_device {
+ struct octep_vf_config *conf;
+
+ /* Octeon Chip type. */
+ u16 chip_id;
+ u16 rev_id;
+
+ /* Device capabilities enabled */
+ u64 caps_enabled;
+ /* Device capabilities supported */
+ u64 caps_supported;
+
+ /* Pointer to basic Linux device */
+ struct device *dev;
+ /* Linux PCI device pointer */
+ struct pci_dev *pdev;
+ /* Netdev corresponding to the Octeon device */
+ struct net_device *netdev;
+
+ /* memory mapped io range */
+ struct octep_vf_mmio mmio;
+
+ /* MAC address */
+ u8 mac_addr[ETH_ALEN];
+
+ /* Tx queues (IQ: Instruction Queue) */
+ u16 num_iqs;
+ /* Pointers to Octeon Tx queues */
+ struct octep_vf_iq *iq[OCTEP_VF_MAX_IQ];
+
+ /* Rx queues (OQ: Output Queue) */
+ u16 num_oqs;
+ /* Pointers to Octeon Rx queues */
+ struct octep_vf_oq *oq[OCTEP_VF_MAX_OQ];
+
+ /* Hardware port number of the PCIe interface */
+ u16 pcie_port;
+
+ /* Hardware operations */
+ struct octep_vf_hw_ops hw_ops;
+
+ /* IRQ info */
+ u16 num_irqs;
+ u16 num_non_ioq_irqs;
+ char *non_ioq_irq_names;
+ struct msix_entry *msix_entries;
+ /* IOq information of it's corresponding MSI-X interrupt. */
+ struct octep_vf_ioq_vector *ioq_vector[OCTEP_VF_MAX_QUEUES];
+
+ /* Hardware Interface Tx statistics */
+ struct octep_vf_iface_tx_stats iface_tx_stats;
+ /* Hardware Interface Rx statistics */
+ struct octep_vf_iface_rx_stats iface_rx_stats;
+
+ /* Hardware Interface Link info like supported modes, aneg support */
+ struct octep_vf_iface_link_info link_info;
+
+ /* Mailbox to talk to VFs */
+ struct octep_vf_mbox *mbox;
+
+ /* Work entry to handle Tx timeout */
+ struct work_struct tx_timeout_task;
+
+ /* offset for iface stats */
+ u32 ctrl_mbox_ifstats_offset;
+
+ /* Negotiated Mbox version */
+ u32 mbox_neg_ver;
+
+ /* firmware info */
+ struct octep_vf_fw_info fw_info;
+};
+
+static inline u16 OCTEP_VF_MAJOR_REV(struct octep_vf_device *oct)
+{
+ u16 rev = (oct->rev_id & 0xC) >> 2;
+
+ return (rev == 0) ? 1 : rev;
+}
+
+static inline u16 OCTEP_VF_MINOR_REV(struct octep_vf_device *oct)
+{
+ return (oct->rev_id & 0x3);
+}
+
+/* Octeon CSR read/write access APIs */
+#define octep_vf_write_csr(octep_vf_dev, reg_off, value) \
+ writel(value, (octep_vf_dev)->mmio.hw_addr + (reg_off))
+
+#define octep_vf_write_csr64(octep_vf_dev, reg_off, val64) \
+ writeq(val64, (octep_vf_dev)->mmio.hw_addr + (reg_off))
+
+#define octep_vf_read_csr(octep_vf_dev, reg_off) \
+ readl((octep_vf_dev)->mmio.hw_addr + (reg_off))
+
+#define octep_vf_read_csr64(octep_vf_dev, reg_off) \
+ readq((octep_vf_dev)->mmio.hw_addr + (reg_off))
+
+extern struct workqueue_struct *octep_vf_wq;
+
+int octep_vf_device_setup(struct octep_vf_device *oct);
+int octep_vf_setup_iqs(struct octep_vf_device *oct);
+void octep_vf_free_iqs(struct octep_vf_device *oct);
+void octep_vf_clean_iqs(struct octep_vf_device *oct);
+int octep_vf_setup_oqs(struct octep_vf_device *oct);
+void octep_vf_free_oqs(struct octep_vf_device *oct);
+void octep_vf_oq_dbell_init(struct octep_vf_device *oct);
+void octep_vf_device_setup_cn93(struct octep_vf_device *oct);
+void octep_vf_device_setup_cnxk(struct octep_vf_device *oct);
+int octep_vf_iq_process_completions(struct octep_vf_iq *iq, u16 budget);
+int octep_vf_oq_process_rx(struct octep_vf_oq *oq, int budget);
+void octep_vf_mbox_work(struct work_struct *work);
+#endif /* _OCTEP_VF_MAIN_H_ */
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.c
new file mode 100644
index 000000000000..1c1fe293fc50
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+
+int octep_vf_setup_mbox(struct octep_vf_device *oct)
+{
+ int ring = 0;
+
+ oct->mbox = vzalloc(sizeof(*oct->mbox));
+ if (!oct->mbox)
+ return -1;
+
+ mutex_init(&oct->mbox->lock);
+
+ oct->hw_ops.setup_mbox_regs(oct, ring);
+ INIT_WORK(&oct->mbox->wk.work, octep_vf_mbox_work);
+ oct->mbox->wk.ctxptr = oct;
+ dev_info(&oct->pdev->dev, "setup vf mbox successfully\n");
+ return 0;
+}
+
+void octep_vf_delete_mbox(struct octep_vf_device *oct)
+{
+ if (oct->mbox) {
+ if (work_pending(&oct->mbox->wk.work))
+ cancel_work_sync(&oct->mbox->wk.work);
+
+ mutex_destroy(&oct->mbox->lock);
+ vfree(oct->mbox);
+ oct->mbox = NULL;
+ dev_info(&oct->pdev->dev, "Deleted vf mbox successfully\n");
+ }
+}
+
+int octep_vf_mbox_version_check(struct octep_vf_device *oct)
+{
+ return 0;
+}
+
+void octep_vf_mbox_work(struct work_struct *work)
+{
+}
+
+int octep_vf_mbox_set_mtu(struct octep_vf_device *oct, int mtu)
+{
+ return 0;
+}
+
+int octep_vf_mbox_set_mac_addr(struct octep_vf_device *oct, char *mac_addr)
+{
+ return 0;
+}
+
+int octep_vf_mbox_get_mac_addr(struct octep_vf_device *oct, char *mac_addr)
+{
+ return 0;
+}
+
+int octep_vf_mbox_set_rx_state(struct octep_vf_device *oct, bool state)
+{
+ return 0;
+}
+
+int octep_vf_mbox_set_link_status(struct octep_vf_device *oct, bool status)
+{
+ return 0;
+}
+
+int octep_vf_mbox_get_link_status(struct octep_vf_device *oct, u8 *oper_up)
+{
+ return 0;
+}
+
+int octep_vf_mbox_dev_remove(struct octep_vf_device *oct)
+{
+ return 0;
+}
+
+int octep_vf_mbox_get_fw_info(struct octep_vf_device *oct)
+{
+ return 0;
+}
+
+int octep_vf_mbox_set_offloads(struct octep_vf_device *oct, u16 tx_offloads,
+ u16 rx_offloads)
+{
+ return 0;
+}
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.h
new file mode 100644
index 000000000000..14f4fb19445b
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_mbox.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+#ifndef _OCTEP_VF_MBOX_H_
+#define _OCTEP_VF_MBOX_H_
+
+#define OCTEP_PFVF_MBOX_MAX_DATA_BUF_SIZE 256
+
+int octep_vf_setup_mbox(struct octep_vf_device *oct);
+void octep_vf_delete_mbox(struct octep_vf_device *oct);
+int octep_vf_mbox_set_mtu(struct octep_vf_device *oct, int mtu);
+int octep_vf_mbox_set_mac_addr(struct octep_vf_device *oct, char *mac_addr);
+int octep_vf_mbox_get_mac_addr(struct octep_vf_device *oct, char *mac_addr);
+int octep_vf_mbox_version_check(struct octep_vf_device *oct);
+int octep_vf_mbox_set_rx_state(struct octep_vf_device *oct, bool state);
+int octep_vf_mbox_set_link_status(struct octep_vf_device *oct, bool status);
+int octep_vf_mbox_get_link_status(struct octep_vf_device *oct, u8 *oper_up);
+int octep_vf_mbox_dev_remove(struct octep_vf_device *oct);
+int octep_vf_mbox_get_fw_info(struct octep_vf_device *oct);
+int octep_vf_mbox_set_offloads(struct octep_vf_device *oct, u16 tx_offloads, u16 rx_offloads);
+
+#endif
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cn9k.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cn9k.h
new file mode 100644
index 000000000000..25e2a876ebba
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cn9k.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+#ifndef _OCTEP_VF_REGS_CN9K_H_
+#define _OCTEP_VF_REGS_CN9K_H_
+
+/*############################ RST #########################*/
+#define CN93_VF_CONFIG_XPANSION_BAR 0x38
+#define CN93_VF_CONFIG_PCIE_CAP 0x70
+#define CN93_VF_CONFIG_PCIE_DEVCAP 0x74
+#define CN93_VF_CONFIG_PCIE_DEVCTL 0x78
+#define CN93_VF_CONFIG_PCIE_LINKCAP 0x7C
+#define CN93_VF_CONFIG_PCIE_LINKCTL 0x80
+#define CN93_VF_CONFIG_PCIE_SLOTCAP 0x84
+#define CN93_VF_CONFIG_PCIE_SLOTCTL 0x88
+
+#define CN93_VF_RING_OFFSET BIT_ULL(17)
+
+/*###################### RING IN REGISTERS #########################*/
+#define CN93_VF_SDP_R_IN_CONTROL_START 0x10000
+#define CN93_VF_SDP_R_IN_ENABLE_START 0x10010
+#define CN93_VF_SDP_R_IN_INSTR_BADDR_START 0x10020
+#define CN93_VF_SDP_R_IN_INSTR_RSIZE_START 0x10030
+#define CN93_VF_SDP_R_IN_INSTR_DBELL_START 0x10040
+#define CN93_VF_SDP_R_IN_CNTS_START 0x10050
+#define CN93_VF_SDP_R_IN_INT_LEVELS_START 0x10060
+#define CN93_VF_SDP_R_IN_PKT_CNT_START 0x10080
+#define CN93_VF_SDP_R_IN_BYTE_CNT_START 0x10090
+
+#define CN93_VF_SDP_R_IN_CONTROL(ring) \
+ (CN93_VF_SDP_R_IN_CONTROL_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_ENABLE(ring) \
+ (CN93_VF_SDP_R_IN_ENABLE_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_INSTR_BADDR(ring) \
+ (CN93_VF_SDP_R_IN_INSTR_BADDR_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_INSTR_RSIZE(ring) \
+ (CN93_VF_SDP_R_IN_INSTR_RSIZE_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_INSTR_DBELL(ring) \
+ (CN93_VF_SDP_R_IN_INSTR_DBELL_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_CNTS(ring) \
+ (CN93_VF_SDP_R_IN_CNTS_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_INT_LEVELS(ring) \
+ (CN93_VF_SDP_R_IN_INT_LEVELS_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_PKT_CNT(ring) \
+ (CN93_VF_SDP_R_IN_PKT_CNT_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_IN_BYTE_CNT(ring) \
+ (CN93_VF_SDP_R_IN_BYTE_CNT_START + ((ring) * CN93_VF_RING_OFFSET))
+
+/*------------------ R_IN Masks ----------------*/
+
+/** Rings per Virtual Function **/
+#define CN93_VF_R_IN_CTL_RPVF_MASK (0xF)
+#define CN93_VF_R_IN_CTL_RPVF_POS (48)
+
+/* Number of instructions to be read in one MAC read request.
+ * setting to Max value(4)
+ **/
+#define CN93_VF_R_IN_CTL_IDLE BIT_ULL(28)
+#define CN93_VF_R_IN_CTL_RDSIZE (0x3ULL << 25)
+#define CN93_VF_R_IN_CTL_IS_64B BIT_ULL(24)
+#define CN93_VF_R_IN_CTL_D_NSR BIT_ULL(8)
+#define CN93_VF_R_IN_CTL_D_ESR BIT_ULL(6)
+#define CN93_VF_R_IN_CTL_D_ROR BIT_ULL(5)
+#define CN93_VF_R_IN_CTL_NSR BIT_ULL(3)
+#define CN93_VF_R_IN_CTL_ESR BIT_ULL(1)
+#define CN93_VF_R_IN_CTL_ROR BIT_ULL(0)
+
+#define CN93_VF_R_IN_CTL_MASK (CN93_VF_R_IN_CTL_RDSIZE | CN93_VF_R_IN_CTL_IS_64B)
+
+/*###################### RING OUT REGISTERS #########################*/
+#define CN93_VF_SDP_R_OUT_CNTS_START 0x10100
+#define CN93_VF_SDP_R_OUT_INT_LEVELS_START 0x10110
+#define CN93_VF_SDP_R_OUT_SLIST_BADDR_START 0x10120
+#define CN93_VF_SDP_R_OUT_SLIST_RSIZE_START 0x10130
+#define CN93_VF_SDP_R_OUT_SLIST_DBELL_START 0x10140
+#define CN93_VF_SDP_R_OUT_CONTROL_START 0x10150
+#define CN93_VF_SDP_R_OUT_ENABLE_START 0x10160
+#define CN93_VF_SDP_R_OUT_PKT_CNT_START 0x10180
+#define CN93_VF_SDP_R_OUT_BYTE_CNT_START 0x10190
+
+#define CN93_VF_SDP_R_OUT_CONTROL(ring) \
+ (CN93_VF_SDP_R_OUT_CONTROL_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_ENABLE(ring) \
+ (CN93_VF_SDP_R_OUT_ENABLE_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_SLIST_BADDR(ring) \
+ (CN93_VF_SDP_R_OUT_SLIST_BADDR_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_SLIST_RSIZE(ring) \
+ (CN93_VF_SDP_R_OUT_SLIST_RSIZE_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_SLIST_DBELL(ring) \
+ (CN93_VF_SDP_R_OUT_SLIST_DBELL_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_CNTS(ring) \
+ (CN93_VF_SDP_R_OUT_CNTS_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_INT_LEVELS(ring) \
+ (CN93_VF_SDP_R_OUT_INT_LEVELS_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_PKT_CNT(ring) \
+ (CN93_VF_SDP_R_OUT_PKT_CNT_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_OUT_BYTE_CNT(ring) \
+ (CN93_VF_SDP_R_OUT_BYTE_CNT_START + ((ring) * CN93_VF_RING_OFFSET))
+
+/*------------------ R_OUT Masks ----------------*/
+#define CN93_VF_R_OUT_INT_LEVELS_BMODE BIT_ULL(63)
+#define CN93_VF_R_OUT_INT_LEVELS_TIMET (32)
+
+#define CN93_VF_R_OUT_CTL_IDLE BIT_ULL(40)
+#define CN93_VF_R_OUT_CTL_ES_I BIT_ULL(34)
+#define CN93_VF_R_OUT_CTL_NSR_I BIT_ULL(33)
+#define CN93_VF_R_OUT_CTL_ROR_I BIT_ULL(32)
+#define CN93_VF_R_OUT_CTL_ES_D BIT_ULL(30)
+#define CN93_VF_R_OUT_CTL_NSR_D BIT_ULL(29)
+#define CN93_VF_R_OUT_CTL_ROR_D BIT_ULL(28)
+#define CN93_VF_R_OUT_CTL_ES_P BIT_ULL(26)
+#define CN93_VF_R_OUT_CTL_NSR_P BIT_ULL(25)
+#define CN93_VF_R_OUT_CTL_ROR_P BIT_ULL(24)
+#define CN93_VF_R_OUT_CTL_IMODE BIT_ULL(23)
+
+/* ##################### Mail Box Registers ########################## */
+/* SDP PF to VF Mailbox Data Register */
+#define CN93_VF_SDP_R_MBOX_PF_VF_DATA_START 0x10210
+/* SDP Packet PF to VF Mailbox Interrupt Register */
+#define CN93_VF_SDP_R_MBOX_PF_VF_INT_START 0x10220
+/* SDP VF to PF Mailbox Data Register */
+#define CN93_VF_SDP_R_MBOX_VF_PF_DATA_START 0x10230
+
+#define CN93_VF_SDP_R_MBOX_PF_VF_INT_ENAB BIT_ULL(1)
+#define CN93_VF_SDP_R_MBOX_PF_VF_INT_STATUS BIT_ULL(0)
+
+#define CN93_VF_SDP_R_MBOX_PF_VF_DATA(ring) \
+ (CN93_VF_SDP_R_MBOX_PF_VF_DATA_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_MBOX_PF_VF_INT(ring) \
+ (CN93_VF_SDP_R_MBOX_PF_VF_INT_START + ((ring) * CN93_VF_RING_OFFSET))
+
+#define CN93_VF_SDP_R_MBOX_VF_PF_DATA(ring) \
+ (CN93_VF_SDP_R_MBOX_VF_PF_DATA_START + ((ring) * CN93_VF_RING_OFFSET))
+#endif /* _OCTEP_VF_REGS_CN9K_H_ */
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cnxk.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cnxk.h
new file mode 100644
index 000000000000..2e156745ef64
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_regs_cnxk.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+#ifndef _OCTEP_VF_REGS_CNXK_H_
+#define _OCTEP_VF_REGS_CNXK_H_
+
+/*############################ RST #########################*/
+#define CNXK_VF_CONFIG_XPANSION_BAR 0x38
+#define CNXK_VF_CONFIG_PCIE_CAP 0x70
+#define CNXK_VF_CONFIG_PCIE_DEVCAP 0x74
+#define CNXK_VF_CONFIG_PCIE_DEVCTL 0x78
+#define CNXK_VF_CONFIG_PCIE_LINKCAP 0x7C
+#define CNXK_VF_CONFIG_PCIE_LINKCTL 0x80
+#define CNXK_VF_CONFIG_PCIE_SLOTCAP 0x84
+#define CNXK_VF_CONFIG_PCIE_SLOTCTL 0x88
+
+#define CNXK_VF_RING_OFFSET (0x1ULL << 17)
+
+/*###################### RING IN REGISTERS #########################*/
+#define CNXK_VF_SDP_R_IN_CONTROL_START 0x10000
+#define CNXK_VF_SDP_R_IN_ENABLE_START 0x10010
+#define CNXK_VF_SDP_R_IN_INSTR_BADDR_START 0x10020
+#define CNXK_VF_SDP_R_IN_INSTR_RSIZE_START 0x10030
+#define CNXK_VF_SDP_R_IN_INSTR_DBELL_START 0x10040
+#define CNXK_VF_SDP_R_IN_CNTS_START 0x10050
+#define CNXK_VF_SDP_R_IN_INT_LEVELS_START 0x10060
+#define CNXK_VF_SDP_R_IN_PKT_CNT_START 0x10080
+#define CNXK_VF_SDP_R_IN_BYTE_CNT_START 0x10090
+#define CNXK_VF_SDP_R_ERR_TYPE_START 0x10400
+
+#define CNXK_VF_SDP_R_ERR_TYPE(ring) \
+ (CNXK_VF_SDP_R_ERR_TYPE_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_CONTROL(ring) \
+ (CNXK_VF_SDP_R_IN_CONTROL_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_ENABLE(ring) \
+ (CNXK_VF_SDP_R_IN_ENABLE_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_INSTR_BADDR(ring) \
+ (CNXK_VF_SDP_R_IN_INSTR_BADDR_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_INSTR_RSIZE(ring) \
+ (CNXK_VF_SDP_R_IN_INSTR_RSIZE_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_INSTR_DBELL(ring) \
+ (CNXK_VF_SDP_R_IN_INSTR_DBELL_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_CNTS(ring) \
+ (CNXK_VF_SDP_R_IN_CNTS_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_INT_LEVELS(ring) \
+ (CNXK_VF_SDP_R_IN_INT_LEVELS_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_PKT_CNT(ring) \
+ (CNXK_VF_SDP_R_IN_PKT_CNT_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_IN_BYTE_CNT(ring) \
+ (CNXK_VF_SDP_R_IN_BYTE_CNT_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+/*------------------ R_IN Masks ----------------*/
+
+/** Rings per Virtual Function **/
+#define CNXK_VF_R_IN_CTL_RPVF_MASK (0xF)
+#define CNXK_VF_R_IN_CTL_RPVF_POS (48)
+
+/* Number of instructions to be read in one MAC read request.
+ * setting to Max value(4)
+ **/
+#define CNXK_VF_R_IN_CTL_IDLE (0x1ULL << 28)
+#define CNXK_VF_R_IN_CTL_RDSIZE (0x3ULL << 25)
+#define CNXK_VF_R_IN_CTL_IS_64B (0x1ULL << 24)
+#define CNXK_VF_R_IN_CTL_D_NSR (0x1ULL << 8)
+#define CNXK_VF_R_IN_CTL_D_ESR (0x1ULL << 6)
+#define CNXK_VF_R_IN_CTL_D_ROR (0x1ULL << 5)
+#define CNXK_VF_R_IN_CTL_NSR (0x1ULL << 3)
+#define CNXK_VF_R_IN_CTL_ESR (0x1ULL << 1)
+#define CNXK_VF_R_IN_CTL_ROR (0x1ULL << 0)
+
+#define CNXK_VF_R_IN_CTL_MASK (CNXK_VF_R_IN_CTL_RDSIZE | CNXK_VF_R_IN_CTL_IS_64B)
+
+/*###################### RING OUT REGISTERS #########################*/
+#define CNXK_VF_SDP_R_OUT_CNTS_START 0x10100
+#define CNXK_VF_SDP_R_OUT_INT_LEVELS_START 0x10110
+#define CNXK_VF_SDP_R_OUT_SLIST_BADDR_START 0x10120
+#define CNXK_VF_SDP_R_OUT_SLIST_RSIZE_START 0x10130
+#define CNXK_VF_SDP_R_OUT_SLIST_DBELL_START 0x10140
+#define CNXK_VF_SDP_R_OUT_CONTROL_START 0x10150
+#define CNXK_VF_SDP_R_OUT_WMARK_START 0x10160
+#define CNXK_VF_SDP_R_OUT_ENABLE_START 0x10170
+#define CNXK_VF_SDP_R_OUT_PKT_CNT_START 0x10180
+#define CNXK_VF_SDP_R_OUT_BYTE_CNT_START 0x10190
+
+#define CNXK_VF_SDP_R_OUT_CONTROL(ring) \
+ (CNXK_VF_SDP_R_OUT_CONTROL_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_ENABLE(ring) \
+ (CNXK_VF_SDP_R_OUT_ENABLE_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_SLIST_BADDR(ring) \
+ (CNXK_VF_SDP_R_OUT_SLIST_BADDR_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_SLIST_RSIZE(ring) \
+ (CNXK_VF_SDP_R_OUT_SLIST_RSIZE_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_SLIST_DBELL(ring) \
+ (CNXK_VF_SDP_R_OUT_SLIST_DBELL_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_WMARK(ring) \
+ (CNXK_VF_SDP_R_OUT_WMARK_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_CNTS(ring) \
+ (CNXK_VF_SDP_R_OUT_CNTS_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_INT_LEVELS(ring) \
+ (CNXK_VF_SDP_R_OUT_INT_LEVELS_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_PKT_CNT(ring) \
+ (CNXK_VF_SDP_R_OUT_PKT_CNT_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_OUT_BYTE_CNT(ring) \
+ (CNXK_VF_SDP_R_OUT_BYTE_CNT_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+/*------------------ R_OUT Masks ----------------*/
+#define CNXK_VF_R_OUT_INT_LEVELS_BMODE BIT_ULL(63)
+#define CNXK_VF_R_OUT_INT_LEVELS_TIMET (32)
+
+#define CNXK_VF_R_OUT_CTL_IDLE BIT_ULL(40)
+#define CNXK_VF_R_OUT_CTL_ES_I BIT_ULL(34)
+#define CNXK_VF_R_OUT_CTL_NSR_I BIT_ULL(33)
+#define CNXK_VF_R_OUT_CTL_ROR_I BIT_ULL(32)
+#define CNXK_VF_R_OUT_CTL_ES_D BIT_ULL(30)
+#define CNXK_VF_R_OUT_CTL_NSR_D BIT_ULL(29)
+#define CNXK_VF_R_OUT_CTL_ROR_D BIT_ULL(28)
+#define CNXK_VF_R_OUT_CTL_ES_P BIT_ULL(26)
+#define CNXK_VF_R_OUT_CTL_NSR_P BIT_ULL(25)
+#define CNXK_VF_R_OUT_CTL_ROR_P BIT_ULL(24)
+#define CNXK_VF_R_OUT_CTL_IMODE BIT_ULL(23)
+
+/* ##################### Mail Box Registers ########################## */
+/* SDP PF to VF Mailbox Data Register */
+#define CNXK_VF_SDP_R_MBOX_PF_VF_DATA_START 0x10210
+/* SDP Packet PF to VF Mailbox Interrupt Register */
+#define CNXK_VF_SDP_R_MBOX_PF_VF_INT_START 0x10220
+/* SDP VF to PF Mailbox Data Register */
+#define CNXK_VF_SDP_R_MBOX_VF_PF_DATA_START 0x10230
+
+#define CNXK_VF_SDP_R_MBOX_PF_VF_INT_ENAB BIT_ULL(1)
+#define CNXK_VF_SDP_R_MBOX_PF_VF_INT_STATUS BIT_ULL(0)
+
+#define CNXK_VF_SDP_R_MBOX_PF_VF_DATA(ring) \
+ (CNXK_VF_SDP_R_MBOX_PF_VF_DATA_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_MBOX_PF_VF_INT(ring) \
+ (CNXK_VF_SDP_R_MBOX_PF_VF_INT_START + ((ring) * CNXK_VF_RING_OFFSET))
+
+#define CNXK_VF_SDP_R_MBOX_VF_PF_DATA(ring) \
+ (CNXK_VF_SDP_R_MBOX_VF_PF_DATA_START + ((ring) * CNXK_VF_RING_OFFSET))
+#endif /* _OCTEP_VF_REGS_CNXK_H_ */
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c
new file mode 100644
index 000000000000..4f1a8157ce39
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+
+/**
+ * octep_vf_setup_oqs() - setup resources for all Rx queues.
+ *
+ * @oct: Octeon device private data structure.
+ */
+int octep_vf_setup_oqs(struct octep_vf_device *oct)
+{
+ return -1;
+}
+
+/**
+ * octep_vf_oq_dbell_init() - Initialize Rx queue doorbell.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * Write number of descriptors to Rx queue doorbell register.
+ */
+void octep_vf_oq_dbell_init(struct octep_vf_device *oct)
+{
+}
+
+/**
+ * octep_vf_free_oqs() - Free resources of all Rx queues.
+ *
+ * @oct: Octeon device private data structure.
+ */
+void octep_vf_free_oqs(struct octep_vf_device *oct)
+{
+}
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.h
new file mode 100644
index 000000000000..fe46838b5200
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.h
@@ -0,0 +1,224 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#ifndef _OCTEP_VF_RX_H_
+#define _OCTEP_VF_RX_H_
+
+/* struct octep_vf_oq_desc_hw - Octeon Hardware OQ descriptor format.
+ *
+ * The descriptor ring is made of descriptors which have 2 64-bit values:
+ *
+ * @buffer_ptr: DMA address of the skb->data
+ * @info_ptr: DMA address of host memory, used to update pkt count by hw.
+ * This is currently unused to save pci writes.
+ */
+struct octep_vf_oq_desc_hw {
+ dma_addr_t buffer_ptr;
+ u64 info_ptr;
+};
+
+static_assert(sizeof(struct octep_vf_oq_desc_hw) == 16);
+
+#define OCTEP_VF_OQ_DESC_SIZE (sizeof(struct octep_vf_oq_desc_hw))
+
+/* Rx offload flags */
+#define OCTEP_VF_RX_OFFLOAD_VLAN_STRIP BIT(0)
+#define OCTEP_VF_RX_OFFLOAD_IPV4_CKSUM BIT(1)
+#define OCTEP_VF_RX_OFFLOAD_UDP_CKSUM BIT(2)
+#define OCTEP_VF_RX_OFFLOAD_TCP_CKSUM BIT(3)
+
+#define OCTEP_VF_RX_OFFLOAD_CKSUM (OCTEP_VF_RX_OFFLOAD_IPV4_CKSUM | \
+ OCTEP_VF_RX_OFFLOAD_UDP_CKSUM | \
+ OCTEP_VF_RX_OFFLOAD_TCP_CKSUM)
+
+#define OCTEP_VF_RX_IP_CSUM(flags) ((flags) & \
+ (OCTEP_VF_RX_OFFLOAD_IPV4_CKSUM | \
+ OCTEP_VF_RX_OFFLOAD_TCP_CKSUM | \
+ OCTEP_VF_RX_OFFLOAD_UDP_CKSUM))
+
+/* bit 0 is vlan strip */
+#define OCTEP_VF_RX_CSUM_IP_VERIFIED BIT(1)
+#define OCTEP_VF_RX_CSUM_L4_VERIFIED BIT(2)
+
+#define OCTEP_VF_RX_CSUM_VERIFIED(flags) ((flags) & \
+ (OCTEP_VF_RX_CSUM_L4_VERIFIED | \
+ OCTEP_VF_RX_CSUM_IP_VERIFIED))
+
+/* Extended Response Header in packet data received from Hardware.
+ * Includes metadata like checksum status.
+ * this is valid only if hardware/firmware published support for this.
+ * This is at offset 0 of packet data (skb->data).
+ */
+struct octep_vf_oq_resp_hw_ext {
+ /* Reserved. */
+ u64 rsvd:48;
+
+ /* rx offload flags */
+ u16 rx_ol_flags;
+};
+
+static_assert(sizeof(struct octep_vf_oq_resp_hw_ext) == 8);
+
+#define OCTEP_VF_OQ_RESP_HW_EXT_SIZE (sizeof(struct octep_vf_oq_resp_hw_ext))
+
+/* Length of Rx packet DMA'ed by Octeon to Host.
+ * this is in bigendian; so need to be converted to cpu endian.
+ * Octeon writes this at the beginning of Rx buffer (skb->data).
+ */
+struct octep_vf_oq_resp_hw {
+ /* The Length of the packet. */
+ __be64 length;
+};
+
+static_assert(sizeof(struct octep_vf_oq_resp_hw) == 8);
+
+#define OCTEP_VF_OQ_RESP_HW_SIZE (sizeof(struct octep_vf_oq_resp_hw))
+
+/* Pointer to data buffer.
+ * Driver keeps a pointer to the data buffer that it made available to
+ * the Octeon device. Since the descriptor ring keeps physical (bus)
+ * addresses, this field is required for the driver to keep track of
+ * the virtual address pointers. The fields are operated by
+ * OS-dependent routines.
+ */
+struct octep_vf_rx_buffer {
+ struct page *page;
+
+ /* length from rx hardware descriptor after converting to cpu endian */
+ u64 len;
+};
+
+#define OCTEP_VF_OQ_RECVBUF_SIZE (sizeof(struct octep_vf_rx_buffer))
+
+/* Output Queue statistics. Each output queue has four stats fields. */
+struct octep_vf_oq_stats {
+ /* Number of packets received from the Device. */
+ u64 packets;
+
+ /* Number of bytes received from the Device. */
+ u64 bytes;
+
+ /* Number of times failed to allocate buffers. */
+ u64 alloc_failures;
+};
+
+#define OCTEP_VF_OQ_STATS_SIZE (sizeof(struct octep_vf_oq_stats))
+
+/* Hardware interface Rx statistics */
+struct octep_vf_iface_rx_stats {
+ /* Received packets */
+ u64 pkts;
+
+ /* Octets of received packets */
+ u64 octets;
+
+ /* Received PAUSE and Control packets */
+ u64 pause_pkts;
+
+ /* Received PAUSE and Control octets */
+ u64 pause_octets;
+
+ /* Filtered DMAC0 packets */
+ u64 dmac0_pkts;
+
+ /* Filtered DMAC0 octets */
+ u64 dmac0_octets;
+
+ /* Packets dropped due to RX FIFO full */
+ u64 dropped_pkts_fifo_full;
+
+ /* Octets dropped due to RX FIFO full */
+ u64 dropped_octets_fifo_full;
+
+ /* Error packets */
+ u64 err_pkts;
+
+ /* Filtered DMAC1 packets */
+ u64 dmac1_pkts;
+
+ /* Filtered DMAC1 octets */
+ u64 dmac1_octets;
+
+ /* NCSI-bound packets dropped */
+ u64 ncsi_dropped_pkts;
+
+ /* NCSI-bound octets dropped */
+ u64 ncsi_dropped_octets;
+
+ /* Multicast packets received. */
+ u64 mcast_pkts;
+
+ /* Broadcast packets received. */
+ u64 bcast_pkts;
+
+};
+
+/* The Descriptor Ring Output Queue structure.
+ * This structure has all the information required to implement a
+ * Octeon OQ.
+ */
+struct octep_vf_oq {
+ u32 q_no;
+
+ struct octep_vf_device *octep_vf_dev;
+ struct net_device *netdev;
+ struct device *dev;
+
+ struct napi_struct *napi;
+
+ /* The receive buffer list. This list has the virtual addresses
+ * of the buffers.
+ */
+ struct octep_vf_rx_buffer *buff_info;
+
+ /* Pointer to the mapped packet credit register.
+ * Host writes number of info/buffer ptrs available to this register
+ */
+ u8 __iomem *pkts_credit_reg;
+
+ /* Pointer to the mapped packet sent register.
+ * Octeon writes the number of packets DMA'ed to host memory
+ * in this register.
+ */
+ u8 __iomem *pkts_sent_reg;
+
+ /* Statistics for this OQ. */
+ struct octep_vf_oq_stats stats;
+
+ /* Packets pending to be processed */
+ u32 pkts_pending;
+ u32 last_pkt_count;
+
+ /* Index in the ring where the driver should read the next packet */
+ u32 host_read_idx;
+
+ /* Number of descriptors in this ring. */
+ u32 max_count;
+ u32 ring_size_mask;
+
+ /* The number of descriptors pending refill. */
+ u32 refill_count;
+
+ /* Index in the ring where the driver will refill the
+ * descriptor's buffer
+ */
+ u32 host_refill_idx;
+ u32 refill_threshold;
+
+ /* The size of each buffer pointed by the buffer pointer. */
+ u32 buffer_size;
+ u32 max_single_buffer_size;
+
+ /* The 8B aligned descriptor ring starts at this address. */
+ struct octep_vf_oq_desc_hw *desc_ring;
+
+ /* DMA mapped address of the OQ descriptor ring. */
+ dma_addr_t desc_ring_dma;
+};
+
+#define OCTEP_VF_OQ_SIZE (sizeof(struct octep_vf_oq))
+#endif /* _OCTEP_VF_RX_H_ */
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.c
new file mode 100644
index 000000000000..232ba479ecf6
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+
+#include "octep_vf_config.h"
+#include "octep_vf_main.h"
+
+/**
+ * octep_vf_clean_iqs() - Clean Tx queues to shutdown the device.
+ *
+ * @oct: Octeon device private data structure.
+ *
+ * Free the buffers in Tx queue descriptors pending completion and
+ * reset queue indices
+ */
+void octep_vf_clean_iqs(struct octep_vf_device *oct)
+{
+}
+
+/**
+ * octep_vf_setup_iqs() - setup resources for all Tx queues.
+ *
+ * @oct: Octeon device private data structure.
+ */
+int octep_vf_setup_iqs(struct octep_vf_device *oct)
+{
+ return -1;
+}
+
+/**
+ * octep_vf_free_iqs() - Free resources of all Tx queues.
+ *
+ * @oct: Octeon device private data structure.
+ */
+void octep_vf_free_iqs(struct octep_vf_device *oct)
+{
+}
diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.h b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.h
new file mode 100644
index 000000000000..f338b975103c
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_tx.h
@@ -0,0 +1,276 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#ifndef _OCTEP_VF_TX_H_
+#define _OCTEP_VF_TX_H_
+
+#define IQ_SEND_OK 0
+#define IQ_SEND_STOP 1
+#define IQ_SEND_FAILED -1
+
+#define TX_BUFTYPE_NONE 0
+#define TX_BUFTYPE_NET 1
+#define TX_BUFTYPE_NET_SG 2
+#define NUM_TX_BUFTYPES 3
+
+/* Hardware format for Scatter/Gather list
+ *
+ * 63 48|47 32|31 16|15 0
+ * -----------------------------------------
+ * | Len 0 | Len 1 | Len 2 | Len 3 |
+ * -----------------------------------------
+ * | Ptr 0 |
+ * -----------------------------------------
+ * | Ptr 1 |
+ * -----------------------------------------
+ * | Ptr 2 |
+ * -----------------------------------------
+ * | Ptr 3 |
+ * -----------------------------------------
+ */
+struct octep_vf_tx_sglist_desc {
+ u16 len[4];
+ dma_addr_t dma_ptr[4];
+};
+
+static_assert(sizeof(struct octep_vf_tx_sglist_desc) == 40);
+
+/* Each Scatter/Gather entry sent to hardwar hold four pointers.
+ * So, number of entries required is (MAX_SKB_FRAGS + 1)/4, where '+1'
+ * is for main skb which also goes as a gather buffer to Octeon hardware.
+ * To allocate sufficient SGLIST entries for a packet with max fragments,
+ * align by adding 3 before calcuating max SGLIST entries per packet.
+ */
+#define OCTEP_VF_SGLIST_ENTRIES_PER_PKT ((MAX_SKB_FRAGS + 1 + 3) / 4)
+#define OCTEP_VF_SGLIST_SIZE_PER_PKT \
+ (OCTEP_VF_SGLIST_ENTRIES_PER_PKT * sizeof(struct octep_vf_tx_sglist_desc))
+
+struct octep_vf_tx_buffer {
+ struct sk_buff *skb;
+ dma_addr_t dma;
+ struct octep_vf_tx_sglist_desc *sglist;
+ dma_addr_t sglist_dma;
+ u8 gather;
+};
+
+#define OCTEP_VF_IQ_TXBUFF_INFO_SIZE (sizeof(struct octep_vf_tx_buffer))
+
+/* VF Hardware interface Tx statistics */
+struct octep_vf_iface_tx_stats {
+ /* Total frames sent on the interface */
+ u64 pkts;
+
+ /* Total octets sent on the interface */
+ u64 octs;
+
+ /* Packets sent to a broadcast DMAC */
+ u64 bcst;
+
+ /* Packets sent to the multicast DMAC */
+ u64 mcst;
+
+ /* Packets dropped */
+ u64 dropped;
+
+ /* Reserved */
+ u64 reserved[13];
+};
+
+/* VF Input Queue statistics */
+struct octep_vf_iq_stats {
+ /* Instructions posted to this queue. */
+ u64 instr_posted;
+
+ /* Instructions copied by hardware for processing. */
+ u64 instr_completed;
+
+ /* Instructions that could not be processed. */
+ u64 instr_dropped;
+
+ /* Bytes sent through this queue. */
+ u64 bytes_sent;
+
+ /* Gather entries sent through this queue. */
+ u64 sgentry_sent;
+
+ /* Number of transmit failures due to TX_BUSY */
+ u64 tx_busy;
+
+ /* Number of times the queue is restarted */
+ u64 restart_cnt;
+};
+
+/* The instruction (input) queue.
+ * The input queue is used to post raw (instruction) mode data or packet
+ * data to Octeon device from the host. Each input queue (up to 4) for
+ * a Octeon device has one such structure to represent it.
+ */
+struct octep_vf_iq {
+ u32 q_no;
+
+ struct octep_vf_device *octep_vf_dev;
+ struct net_device *netdev;
+ struct device *dev;
+ struct netdev_queue *netdev_q;
+
+ /* Index in input ring where driver should write the next packet */
+ u16 host_write_index;
+
+ /* Index in input ring where Octeon is expected to read next packet */
+ u16 octep_vf_read_index;
+
+ /* This index aids in finding the window in the queue where Octeon
+ * has read the commands.
+ */
+ u16 flush_index;
+
+ /* Statistics for this input queue. */
+ struct octep_vf_iq_stats stats;
+
+ /* Pointer to the Virtual Base addr of the input ring. */
+ struct octep_vf_tx_desc_hw *desc_ring;
+
+ /* DMA mapped base address of the input descriptor ring. */
+ dma_addr_t desc_ring_dma;
+
+ /* Info of Tx buffers pending completion. */
+ struct octep_vf_tx_buffer *buff_info;
+
+ /* Base pointer to Scatter/Gather lists for all ring descriptors. */
+ struct octep_vf_tx_sglist_desc *sglist;
+
+ /* DMA mapped addr of Scatter Gather Lists */
+ dma_addr_t sglist_dma;
+
+ /* Octeon doorbell register for the ring. */
+ u8 __iomem *doorbell_reg;
+
+ /* Octeon instruction count register for this ring. */
+ u8 __iomem *inst_cnt_reg;
+
+ /* interrupt level register for this ring */
+ u8 __iomem *intr_lvl_reg;
+
+ /* Maximum no. of instructions in this queue. */
+ u32 max_count;
+ u32 ring_size_mask;
+
+ u32 pkt_in_done;
+ u32 pkts_processed;
+
+ u32 status;
+
+ /* Number of instructions pending to be posted to Octeon. */
+ u32 fill_cnt;
+
+ /* The max. number of instructions that can be held pending by the
+ * driver before ringing doorbell.
+ */
+ u32 fill_threshold;
+};
+
+/* Hardware Tx Instruction Header */
+struct octep_vf_instr_hdr {
+ /* Data Len */
+ u64 tlen:16;
+
+ /* Reserved */
+ u64 rsvd:20;
+
+ /* PKIND for SDP */
+ u64 pkind:6;
+
+ /* Front Data size */
+ u64 fsz:6;
+
+ /* No. of entries in gather list */
+ u64 gsz:14;
+
+ /* Gather indicator 1=gather*/
+ u64 gather:1;
+
+ /* Reserved3 */
+ u64 reserved3:1;
+};
+
+static_assert(sizeof(struct octep_vf_instr_hdr) == 8);
+
+/* Tx offload flags */
+#define OCTEP_VF_TX_OFFLOAD_VLAN_INSERT BIT(0)
+#define OCTEP_VF_TX_OFFLOAD_IPV4_CKSUM BIT(1)
+#define OCTEP_VF_TX_OFFLOAD_UDP_CKSUM BIT(2)
+#define OCTEP_VF_TX_OFFLOAD_TCP_CKSUM BIT(3)
+#define OCTEP_VF_TX_OFFLOAD_SCTP_CKSUM BIT(4)
+#define OCTEP_VF_TX_OFFLOAD_TCP_TSO BIT(5)
+#define OCTEP_VF_TX_OFFLOAD_UDP_TSO BIT(6)
+
+#define OCTEP_VF_TX_OFFLOAD_CKSUM (OCTEP_VF_TX_OFFLOAD_IPV4_CKSUM | \
+ OCTEP_VF_TX_OFFLOAD_UDP_CKSUM | \
+ OCTEP_VF_TX_OFFLOAD_TCP_CKSUM)
+
+#define OCTEP_VF_TX_OFFLOAD_TSO (OCTEP_VF_TX_OFFLOAD_TCP_TSO | \
+ OCTEP_VF_TX_OFFLOAD_UDP_TSO)
+
+#define OCTEP_VF_TX_IP_CSUM(flags) ((flags) & \
+ (OCTEP_VF_TX_OFFLOAD_IPV4_CKSUM | \
+ OCTEP_VF_TX_OFFLOAD_TCP_CKSUM | \
+ OCTEP_VF_TX_OFFLOAD_UDP_CKSUM))
+
+#define OCTEP_VF_TX_TSO(flags) ((flags) & \
+ (OCTEP_VF_TX_OFFLOAD_TCP_TSO | \
+ OCTEP_VF_TX_OFFLOAD_UDP_TSO))
+
+struct tx_mdata {
+ /* offload flags */
+ u16 ol_flags;
+
+ /* gso size */
+ u16 gso_size;
+
+ /* gso flags */
+ u16 gso_segs;
+
+ /* reserved */
+ u16 rsvd1;
+
+ /* reserved */
+ u64 rsvd2;
+};
+
+static_assert(sizeof(struct tx_mdata) == 16);
+
+/* 64-byte Tx instruction format.
+ * Format of instruction for a 64-byte mode input queue.
+ *
+ * only first 16-bytes (dptr and ih) are mandatory; rest are optional
+ * and filled by the driver based on firmware/hardware capabilities.
+ * These optional headers together called Front Data and its size is
+ * described by ih->fsz.
+ */
+struct octep_vf_tx_desc_hw {
+ /* Pointer where the input data is available. */
+ u64 dptr;
+
+ /* Instruction Header. */
+ union {
+ struct octep_vf_instr_hdr ih;
+ u64 ih64;
+ };
+
+ union {
+ u64 txm64[2];
+ struct tx_mdata txm;
+ };
+
+ /* Additional headers available in a 64-byte instruction. */
+ u64 exhdr[4];
+};
+
+static_assert(sizeof(struct octep_vf_tx_desc_hw) == 64);
+
+#define OCTEP_VF_IQ_DESC_SIZE (sizeof(struct octep_vf_tx_desc_hw))
+#endif /* _OCTEP_VF_TX_H_ */
--
2.25.1

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