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
