| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver |
| * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com> |
| * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/sched.h> |
| #include <linux/wait.h> |
| #include <linux/spinlock.h> |
| #include <linux/sort.h> |
| #include <linux/random.h> |
| #include <linux/netdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/socket.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/if_bridge.h> |
| #include <linux/bitops.h> |
| #include <linux/ctype.h> |
| #include <linux/workqueue.h> |
| #include <net/switchdev.h> |
| #include <net/rtnetlink.h> |
| #include <net/netevent.h> |
| #include <net/arp.h> |
| #include <net/fib_rules.h> |
| #include <net/fib_notifier.h> |
| #include <linux/io-64-nonatomic-lo-hi.h> |
| #include <generated/utsrelease.h> |
| |
| #include "rocker_hw.h" |
| #include "rocker.h" |
| #include "rocker_tlv.h" |
| |
| static const char rocker_driver_name[] = "rocker"; |
| |
| static const struct pci_device_id rocker_pci_id_table[] = { |
| {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0}, |
| {0, } |
| }; |
| |
| struct rocker_wait { |
| wait_queue_head_t wait; |
| bool done; |
| bool nowait; |
| }; |
| |
| static void rocker_wait_reset(struct rocker_wait *wait) |
| { |
| wait->done = false; |
| wait->nowait = false; |
| } |
| |
| static void rocker_wait_init(struct rocker_wait *wait) |
| { |
| init_waitqueue_head(&wait->wait); |
| rocker_wait_reset(wait); |
| } |
| |
| static struct rocker_wait *rocker_wait_create(void) |
| { |
| struct rocker_wait *wait; |
| |
| wait = kzalloc(sizeof(*wait), GFP_KERNEL); |
| if (!wait) |
| return NULL; |
| return wait; |
| } |
| |
| static void rocker_wait_destroy(struct rocker_wait *wait) |
| { |
| kfree(wait); |
| } |
| |
| static bool rocker_wait_event_timeout(struct rocker_wait *wait, |
| unsigned long timeout) |
| { |
| wait_event_timeout(wait->wait, wait->done, HZ / 10); |
| if (!wait->done) |
| return false; |
| return true; |
| } |
| |
| static void rocker_wait_wake_up(struct rocker_wait *wait) |
| { |
| wait->done = true; |
| wake_up(&wait->wait); |
| } |
| |
| static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector) |
| { |
| return rocker->msix_entries[vector].vector; |
| } |
| |
| static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port) |
| { |
| return rocker_msix_vector(rocker_port->rocker, |
| ROCKER_MSIX_VEC_TX(rocker_port->port_number)); |
| } |
| |
| static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port) |
| { |
| return rocker_msix_vector(rocker_port->rocker, |
| ROCKER_MSIX_VEC_RX(rocker_port->port_number)); |
| } |
| |
| #define rocker_write32(rocker, reg, val) \ |
| writel((val), (rocker)->hw_addr + (ROCKER_ ## reg)) |
| #define rocker_read32(rocker, reg) \ |
| readl((rocker)->hw_addr + (ROCKER_ ## reg)) |
| #define rocker_write64(rocker, reg, val) \ |
| writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg)) |
| #define rocker_read64(rocker, reg) \ |
| readq((rocker)->hw_addr + (ROCKER_ ## reg)) |
| |
| /***************************** |
| * HW basic testing functions |
| *****************************/ |
| |
| static int rocker_reg_test(const struct rocker *rocker) |
| { |
| const struct pci_dev *pdev = rocker->pdev; |
| u64 test_reg; |
| u64 rnd; |
| |
| rnd = prandom_u32(); |
| rnd >>= 1; |
| rocker_write32(rocker, TEST_REG, rnd); |
| test_reg = rocker_read32(rocker, TEST_REG); |
| if (test_reg != rnd * 2) { |
| dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n", |
| test_reg, rnd * 2); |
| return -EIO; |
| } |
| |
| rnd = prandom_u32(); |
| rnd <<= 31; |
| rnd |= prandom_u32(); |
| rocker_write64(rocker, TEST_REG64, rnd); |
| test_reg = rocker_read64(rocker, TEST_REG64); |
| if (test_reg != rnd * 2) { |
| dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n", |
| test_reg, rnd * 2); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int rocker_dma_test_one(const struct rocker *rocker, |
| struct rocker_wait *wait, u32 test_type, |
| dma_addr_t dma_handle, const unsigned char *buf, |
| const unsigned char *expect, size_t size) |
| { |
| const struct pci_dev *pdev = rocker->pdev; |
| int i; |
| |
| rocker_wait_reset(wait); |
| rocker_write32(rocker, TEST_DMA_CTRL, test_type); |
| |
| if (!rocker_wait_event_timeout(wait, HZ / 10)) { |
| dev_err(&pdev->dev, "no interrupt received within a timeout\n"); |
| return -EIO; |
| } |
| |
| for (i = 0; i < size; i++) { |
| if (buf[i] != expect[i]) { |
| dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected", |
| buf[i], i, expect[i]); |
| return -EIO; |
| } |
| } |
| return 0; |
| } |
| |
| #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4) |
| #define ROCKER_TEST_DMA_FILL_PATTERN 0x96 |
| |
| static int rocker_dma_test_offset(const struct rocker *rocker, |
| struct rocker_wait *wait, int offset) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| unsigned char *alloc; |
| unsigned char *buf; |
| unsigned char *expect; |
| dma_addr_t dma_handle; |
| int i; |
| int err; |
| |
| alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset, |
| GFP_KERNEL | GFP_DMA); |
| if (!alloc) |
| return -ENOMEM; |
| buf = alloc + offset; |
| expect = buf + ROCKER_TEST_DMA_BUF_SIZE; |
| |
| dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE, |
| DMA_BIDIRECTIONAL); |
| if (dma_mapping_error(&pdev->dev, dma_handle)) { |
| err = -EIO; |
| goto free_alloc; |
| } |
| |
| rocker_write64(rocker, TEST_DMA_ADDR, dma_handle); |
| rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE); |
| |
| memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE); |
| err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL, |
| dma_handle, buf, expect, |
| ROCKER_TEST_DMA_BUF_SIZE); |
| if (err) |
| goto unmap; |
| |
| memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE); |
| err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR, |
| dma_handle, buf, expect, |
| ROCKER_TEST_DMA_BUF_SIZE); |
| if (err) |
| goto unmap; |
| |
| prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE); |
| for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++) |
| expect[i] = ~buf[i]; |
| err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT, |
| dma_handle, buf, expect, |
| ROCKER_TEST_DMA_BUF_SIZE); |
| if (err) |
| goto unmap; |
| |
| unmap: |
| dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE, |
| DMA_BIDIRECTIONAL); |
| free_alloc: |
| kfree(alloc); |
| |
| return err; |
| } |
| |
| static int rocker_dma_test(const struct rocker *rocker, |
| struct rocker_wait *wait) |
| { |
| int i; |
| int err; |
| |
| for (i = 0; i < 8; i++) { |
| err = rocker_dma_test_offset(rocker, wait, i); |
| if (err) |
| return err; |
| } |
| return 0; |
| } |
| |
| static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id) |
| { |
| struct rocker_wait *wait = dev_id; |
| |
| rocker_wait_wake_up(wait); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int rocker_basic_hw_test(const struct rocker *rocker) |
| { |
| const struct pci_dev *pdev = rocker->pdev; |
| struct rocker_wait wait; |
| int err; |
| |
| err = rocker_reg_test(rocker); |
| if (err) { |
| dev_err(&pdev->dev, "reg test failed\n"); |
| return err; |
| } |
| |
| err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), |
| rocker_test_irq_handler, 0, |
| rocker_driver_name, &wait); |
| if (err) { |
| dev_err(&pdev->dev, "cannot assign test irq\n"); |
| return err; |
| } |
| |
| rocker_wait_init(&wait); |
| rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST); |
| |
| if (!rocker_wait_event_timeout(&wait, HZ / 10)) { |
| dev_err(&pdev->dev, "no interrupt received within a timeout\n"); |
| err = -EIO; |
| goto free_irq; |
| } |
| |
| err = rocker_dma_test(rocker, &wait); |
| if (err) |
| dev_err(&pdev->dev, "dma test failed\n"); |
| |
| free_irq: |
| free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait); |
| return err; |
| } |
| |
| /****************************************** |
| * DMA rings and descriptors manipulations |
| ******************************************/ |
| |
| static u32 __pos_inc(u32 pos, size_t limit) |
| { |
| return ++pos == limit ? 0 : pos; |
| } |
| |
| static int rocker_desc_err(const struct rocker_desc_info *desc_info) |
| { |
| int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN; |
| |
| switch (err) { |
| case ROCKER_OK: |
| return 0; |
| case -ROCKER_ENOENT: |
| return -ENOENT; |
| case -ROCKER_ENXIO: |
| return -ENXIO; |
| case -ROCKER_ENOMEM: |
| return -ENOMEM; |
| case -ROCKER_EEXIST: |
| return -EEXIST; |
| case -ROCKER_EINVAL: |
| return -EINVAL; |
| case -ROCKER_EMSGSIZE: |
| return -EMSGSIZE; |
| case -ROCKER_ENOTSUP: |
| return -EOPNOTSUPP; |
| case -ROCKER_ENOBUFS: |
| return -ENOBUFS; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info) |
| { |
| desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN; |
| } |
| |
| static bool rocker_desc_gen(const struct rocker_desc_info *desc_info) |
| { |
| u32 comp_err = desc_info->desc->comp_err; |
| |
| return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false; |
| } |
| |
| static void * |
| rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info) |
| { |
| return (void *)(uintptr_t)desc_info->desc->cookie; |
| } |
| |
| static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info, |
| void *ptr) |
| { |
| desc_info->desc->cookie = (uintptr_t) ptr; |
| } |
| |
| static struct rocker_desc_info * |
| rocker_desc_head_get(const struct rocker_dma_ring_info *info) |
| { |
| struct rocker_desc_info *desc_info; |
| u32 head = __pos_inc(info->head, info->size); |
| |
| desc_info = &info->desc_info[info->head]; |
| if (head == info->tail) |
| return NULL; /* ring full */ |
| desc_info->tlv_size = 0; |
| return desc_info; |
| } |
| |
| static void rocker_desc_commit(const struct rocker_desc_info *desc_info) |
| { |
| desc_info->desc->buf_size = desc_info->data_size; |
| desc_info->desc->tlv_size = desc_info->tlv_size; |
| } |
| |
| static void rocker_desc_head_set(const struct rocker *rocker, |
| struct rocker_dma_ring_info *info, |
| const struct rocker_desc_info *desc_info) |
| { |
| u32 head = __pos_inc(info->head, info->size); |
| |
| BUG_ON(head == info->tail); |
| rocker_desc_commit(desc_info); |
| info->head = head; |
| rocker_write32(rocker, DMA_DESC_HEAD(info->type), head); |
| } |
| |
| static struct rocker_desc_info * |
| rocker_desc_tail_get(struct rocker_dma_ring_info *info) |
| { |
| struct rocker_desc_info *desc_info; |
| |
| if (info->tail == info->head) |
| return NULL; /* nothing to be done between head and tail */ |
| desc_info = &info->desc_info[info->tail]; |
| if (!rocker_desc_gen(desc_info)) |
| return NULL; /* gen bit not set, desc is not ready yet */ |
| info->tail = __pos_inc(info->tail, info->size); |
| desc_info->tlv_size = desc_info->desc->tlv_size; |
| return desc_info; |
| } |
| |
| static void rocker_dma_ring_credits_set(const struct rocker *rocker, |
| const struct rocker_dma_ring_info *info, |
| u32 credits) |
| { |
| if (credits) |
| rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits); |
| } |
| |
| static unsigned long rocker_dma_ring_size_fix(size_t size) |
| { |
| return max(ROCKER_DMA_SIZE_MIN, |
| min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX)); |
| } |
| |
| static int rocker_dma_ring_create(const struct rocker *rocker, |
| unsigned int type, |
| size_t size, |
| struct rocker_dma_ring_info *info) |
| { |
| int i; |
| |
| BUG_ON(size != rocker_dma_ring_size_fix(size)); |
| info->size = size; |
| info->type = type; |
| info->head = 0; |
| info->tail = 0; |
| info->desc_info = kcalloc(info->size, sizeof(*info->desc_info), |
| GFP_KERNEL); |
| if (!info->desc_info) |
| return -ENOMEM; |
| |
| info->desc = dma_alloc_coherent(&rocker->pdev->dev, |
| info->size * sizeof(*info->desc), |
| &info->mapaddr, GFP_KERNEL); |
| if (!info->desc) { |
| kfree(info->desc_info); |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < info->size; i++) |
| info->desc_info[i].desc = &info->desc[i]; |
| |
| rocker_write32(rocker, DMA_DESC_CTRL(info->type), |
| ROCKER_DMA_DESC_CTRL_RESET); |
| rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr); |
| rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size); |
| |
| return 0; |
| } |
| |
| static void rocker_dma_ring_destroy(const struct rocker *rocker, |
| const struct rocker_dma_ring_info *info) |
| { |
| rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0); |
| |
| dma_free_coherent(&rocker->pdev->dev, |
| info->size * sizeof(struct rocker_desc), info->desc, |
| info->mapaddr); |
| kfree(info->desc_info); |
| } |
| |
| static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker, |
| struct rocker_dma_ring_info *info) |
| { |
| int i; |
| |
| BUG_ON(info->head || info->tail); |
| |
| /* When ring is consumer, we need to advance head for each desc. |
| * That tells hw that the desc is ready to be used by it. |
| */ |
| for (i = 0; i < info->size - 1; i++) |
| rocker_desc_head_set(rocker, info, &info->desc_info[i]); |
| rocker_desc_commit(&info->desc_info[i]); |
| } |
| |
| static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker, |
| const struct rocker_dma_ring_info *info, |
| int direction, size_t buf_size) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| int i; |
| int err; |
| |
| for (i = 0; i < info->size; i++) { |
| struct rocker_desc_info *desc_info = &info->desc_info[i]; |
| struct rocker_desc *desc = &info->desc[i]; |
| dma_addr_t dma_handle; |
| char *buf; |
| |
| buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA); |
| if (!buf) { |
| err = -ENOMEM; |
| goto rollback; |
| } |
| |
| dma_handle = dma_map_single(&pdev->dev, buf, buf_size, |
| direction); |
| if (dma_mapping_error(&pdev->dev, dma_handle)) { |
| kfree(buf); |
| err = -EIO; |
| goto rollback; |
| } |
| |
| desc_info->data = buf; |
| desc_info->data_size = buf_size; |
| dma_unmap_addr_set(desc_info, mapaddr, dma_handle); |
| |
| desc->buf_addr = dma_handle; |
| desc->buf_size = buf_size; |
| } |
| return 0; |
| |
| rollback: |
| for (i--; i >= 0; i--) { |
| const struct rocker_desc_info *desc_info = &info->desc_info[i]; |
| |
| dma_unmap_single(&pdev->dev, |
| dma_unmap_addr(desc_info, mapaddr), |
| desc_info->data_size, direction); |
| kfree(desc_info->data); |
| } |
| return err; |
| } |
| |
| static void rocker_dma_ring_bufs_free(const struct rocker *rocker, |
| const struct rocker_dma_ring_info *info, |
| int direction) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| int i; |
| |
| for (i = 0; i < info->size; i++) { |
| const struct rocker_desc_info *desc_info = &info->desc_info[i]; |
| struct rocker_desc *desc = &info->desc[i]; |
| |
| desc->buf_addr = 0; |
| desc->buf_size = 0; |
| dma_unmap_single(&pdev->dev, |
| dma_unmap_addr(desc_info, mapaddr), |
| desc_info->data_size, direction); |
| kfree(desc_info->data); |
| } |
| } |
| |
| static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info) |
| { |
| struct rocker_wait *wait; |
| |
| wait = rocker_wait_create(); |
| if (!wait) |
| return -ENOMEM; |
| rocker_desc_cookie_ptr_set(desc_info, wait); |
| return 0; |
| } |
| |
| static void |
| rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info) |
| { |
| struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info); |
| |
| rocker_wait_destroy(wait); |
| } |
| |
| static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker) |
| { |
| const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring; |
| int i; |
| int err; |
| |
| for (i = 0; i < cmd_ring->size; i++) { |
| err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]); |
| if (err) |
| goto rollback; |
| } |
| return 0; |
| |
| rollback: |
| for (i--; i >= 0; i--) |
| rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]); |
| return err; |
| } |
| |
| static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker) |
| { |
| const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring; |
| int i; |
| |
| for (i = 0; i < cmd_ring->size; i++) |
| rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]); |
| } |
| |
| static int rocker_dma_rings_init(struct rocker *rocker) |
| { |
| const struct pci_dev *pdev = rocker->pdev; |
| int err; |
| |
| err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD, |
| ROCKER_DMA_CMD_DEFAULT_SIZE, |
| &rocker->cmd_ring); |
| if (err) { |
| dev_err(&pdev->dev, "failed to create command dma ring\n"); |
| return err; |
| } |
| |
| spin_lock_init(&rocker->cmd_ring_lock); |
| |
| err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring, |
| DMA_BIDIRECTIONAL, PAGE_SIZE); |
| if (err) { |
| dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n"); |
| goto err_dma_cmd_ring_bufs_alloc; |
| } |
| |
| err = rocker_dma_cmd_ring_waits_alloc(rocker); |
| if (err) { |
| dev_err(&pdev->dev, "failed to alloc command dma ring waits\n"); |
| goto err_dma_cmd_ring_waits_alloc; |
| } |
| |
| err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT, |
| ROCKER_DMA_EVENT_DEFAULT_SIZE, |
| &rocker->event_ring); |
| if (err) { |
| dev_err(&pdev->dev, "failed to create event dma ring\n"); |
| goto err_dma_event_ring_create; |
| } |
| |
| err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring, |
| DMA_FROM_DEVICE, PAGE_SIZE); |
| if (err) { |
| dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n"); |
| goto err_dma_event_ring_bufs_alloc; |
| } |
| rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring); |
| return 0; |
| |
| err_dma_event_ring_bufs_alloc: |
| rocker_dma_ring_destroy(rocker, &rocker->event_ring); |
| err_dma_event_ring_create: |
| rocker_dma_cmd_ring_waits_free(rocker); |
| err_dma_cmd_ring_waits_alloc: |
| rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring, |
| DMA_BIDIRECTIONAL); |
| err_dma_cmd_ring_bufs_alloc: |
| rocker_dma_ring_destroy(rocker, &rocker->cmd_ring); |
| return err; |
| } |
| |
| static void rocker_dma_rings_fini(struct rocker *rocker) |
| { |
| rocker_dma_ring_bufs_free(rocker, &rocker->event_ring, |
| DMA_BIDIRECTIONAL); |
| rocker_dma_ring_destroy(rocker, &rocker->event_ring); |
| rocker_dma_cmd_ring_waits_free(rocker); |
| rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring, |
| DMA_BIDIRECTIONAL); |
| rocker_dma_ring_destroy(rocker, &rocker->cmd_ring); |
| } |
| |
| static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| struct sk_buff *skb, size_t buf_len) |
| { |
| const struct rocker *rocker = rocker_port->rocker; |
| struct pci_dev *pdev = rocker->pdev; |
| dma_addr_t dma_handle; |
| |
| dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len, |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(&pdev->dev, dma_handle)) |
| return -EIO; |
| if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle)) |
| goto tlv_put_failure; |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len)) |
| goto tlv_put_failure; |
| return 0; |
| |
| tlv_put_failure: |
| dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE); |
| desc_info->tlv_size = 0; |
| return -EMSGSIZE; |
| } |
| |
| static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port) |
| { |
| return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; |
| } |
| |
| static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info) |
| { |
| struct net_device *dev = rocker_port->dev; |
| struct sk_buff *skb; |
| size_t buf_len = rocker_port_rx_buf_len(rocker_port); |
| int err; |
| |
| /* Ensure that hw will see tlv_size zero in case of an error. |
| * That tells hw to use another descriptor. |
| */ |
| rocker_desc_cookie_ptr_set(desc_info, NULL); |
| desc_info->tlv_size = 0; |
| |
| skb = netdev_alloc_skb_ip_align(dev, buf_len); |
| if (!skb) |
| return -ENOMEM; |
| err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len); |
| if (err) { |
| dev_kfree_skb_any(skb); |
| return err; |
| } |
| rocker_desc_cookie_ptr_set(desc_info, skb); |
| return 0; |
| } |
| |
| static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker, |
| const struct rocker_tlv **attrs) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| dma_addr_t dma_handle; |
| size_t len; |
| |
| if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] || |
| !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]) |
| return; |
| dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]); |
| len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]); |
| dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE); |
| } |
| |
| static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker, |
| const struct rocker_desc_info *desc_info) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1]; |
| struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info); |
| |
| if (!skb) |
| return; |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info); |
| rocker_dma_rx_ring_skb_unmap(rocker, attrs); |
| dev_kfree_skb_any(skb); |
| } |
| |
| static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port) |
| { |
| const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring; |
| const struct rocker *rocker = rocker_port->rocker; |
| int i; |
| int err; |
| |
| for (i = 0; i < rx_ring->size; i++) { |
| err = rocker_dma_rx_ring_skb_alloc(rocker_port, |
| &rx_ring->desc_info[i]); |
| if (err) |
| goto rollback; |
| } |
| return 0; |
| |
| rollback: |
| for (i--; i >= 0; i--) |
| rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]); |
| return err; |
| } |
| |
| static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port) |
| { |
| const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring; |
| const struct rocker *rocker = rocker_port->rocker; |
| int i; |
| |
| for (i = 0; i < rx_ring->size; i++) |
| rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]); |
| } |
| |
| static int rocker_port_dma_rings_init(struct rocker_port *rocker_port) |
| { |
| struct rocker *rocker = rocker_port->rocker; |
| int err; |
| |
| err = rocker_dma_ring_create(rocker, |
| ROCKER_DMA_TX(rocker_port->port_number), |
| ROCKER_DMA_TX_DEFAULT_SIZE, |
| &rocker_port->tx_ring); |
| if (err) { |
| netdev_err(rocker_port->dev, "failed to create tx dma ring\n"); |
| return err; |
| } |
| |
| err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring, |
| DMA_TO_DEVICE, |
| ROCKER_DMA_TX_DESC_SIZE); |
| if (err) { |
| netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n"); |
| goto err_dma_tx_ring_bufs_alloc; |
| } |
| |
| err = rocker_dma_ring_create(rocker, |
| ROCKER_DMA_RX(rocker_port->port_number), |
| ROCKER_DMA_RX_DEFAULT_SIZE, |
| &rocker_port->rx_ring); |
| if (err) { |
| netdev_err(rocker_port->dev, "failed to create rx dma ring\n"); |
| goto err_dma_rx_ring_create; |
| } |
| |
| err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring, |
| DMA_BIDIRECTIONAL, |
| ROCKER_DMA_RX_DESC_SIZE); |
| if (err) { |
| netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n"); |
| goto err_dma_rx_ring_bufs_alloc; |
| } |
| |
| err = rocker_dma_rx_ring_skbs_alloc(rocker_port); |
| if (err) { |
| netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n"); |
| goto err_dma_rx_ring_skbs_alloc; |
| } |
| rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring); |
| |
| return 0; |
| |
| err_dma_rx_ring_skbs_alloc: |
| rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring, |
| DMA_BIDIRECTIONAL); |
| err_dma_rx_ring_bufs_alloc: |
| rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring); |
| err_dma_rx_ring_create: |
| rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring, |
| DMA_TO_DEVICE); |
| err_dma_tx_ring_bufs_alloc: |
| rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring); |
| return err; |
| } |
| |
| static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port) |
| { |
| struct rocker *rocker = rocker_port->rocker; |
| |
| rocker_dma_rx_ring_skbs_free(rocker_port); |
| rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring, |
| DMA_BIDIRECTIONAL); |
| rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring); |
| rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring, |
| DMA_TO_DEVICE); |
| rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring); |
| } |
| |
| static void rocker_port_set_enable(const struct rocker_port *rocker_port, |
| bool enable) |
| { |
| u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE); |
| |
| if (enable) |
| val |= 1ULL << rocker_port->pport; |
| else |
| val &= ~(1ULL << rocker_port->pport); |
| rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val); |
| } |
| |
| /******************************** |
| * Interrupt handler and helpers |
| ********************************/ |
| |
| static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id) |
| { |
| struct rocker *rocker = dev_id; |
| const struct rocker_desc_info *desc_info; |
| struct rocker_wait *wait; |
| u32 credits = 0; |
| |
| spin_lock(&rocker->cmd_ring_lock); |
| while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) { |
| wait = rocker_desc_cookie_ptr_get(desc_info); |
| if (wait->nowait) { |
| rocker_desc_gen_clear(desc_info); |
| } else { |
| rocker_wait_wake_up(wait); |
| } |
| credits++; |
| } |
| spin_unlock(&rocker->cmd_ring_lock); |
| rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void rocker_port_link_up(const struct rocker_port *rocker_port) |
| { |
| netif_carrier_on(rocker_port->dev); |
| netdev_info(rocker_port->dev, "Link is up\n"); |
| } |
| |
| static void rocker_port_link_down(const struct rocker_port *rocker_port) |
| { |
| netif_carrier_off(rocker_port->dev); |
| netdev_info(rocker_port->dev, "Link is down\n"); |
| } |
| |
| static int rocker_event_link_change(const struct rocker *rocker, |
| const struct rocker_tlv *info) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1]; |
| unsigned int port_number; |
| bool link_up; |
| struct rocker_port *rocker_port; |
| |
| rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info); |
| if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] || |
| !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]) |
| return -EIO; |
| port_number = |
| rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1; |
| link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]); |
| |
| if (port_number >= rocker->port_count) |
| return -EINVAL; |
| |
| rocker_port = rocker->ports[port_number]; |
| if (netif_carrier_ok(rocker_port->dev) != link_up) { |
| if (link_up) |
| rocker_port_link_up(rocker_port); |
| else |
| rocker_port_link_down(rocker_port); |
| } |
| |
| return 0; |
| } |
| |
| static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port, |
| const unsigned char *addr, |
| __be16 vlan_id); |
| |
| static int rocker_event_mac_vlan_seen(const struct rocker *rocker, |
| const struct rocker_tlv *info) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1]; |
| unsigned int port_number; |
| struct rocker_port *rocker_port; |
| const unsigned char *addr; |
| __be16 vlan_id; |
| |
| rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info); |
| if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] || |
| !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] || |
| !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]) |
| return -EIO; |
| port_number = |
| rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1; |
| addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]); |
| vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]); |
| |
| if (port_number >= rocker->port_count) |
| return -EINVAL; |
| |
| rocker_port = rocker->ports[port_number]; |
| return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id); |
| } |
| |
| static int rocker_event_process(const struct rocker *rocker, |
| const struct rocker_desc_info *desc_info) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1]; |
| const struct rocker_tlv *info; |
| u16 type; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_EVENT_TYPE] || |
| !attrs[ROCKER_TLV_EVENT_INFO]) |
| return -EIO; |
| |
| type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]); |
| info = attrs[ROCKER_TLV_EVENT_INFO]; |
| |
| switch (type) { |
| case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED: |
| return rocker_event_link_change(rocker, info); |
| case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN: |
| return rocker_event_mac_vlan_seen(rocker, info); |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id) |
| { |
| struct rocker *rocker = dev_id; |
| const struct pci_dev *pdev = rocker->pdev; |
| const struct rocker_desc_info *desc_info; |
| u32 credits = 0; |
| int err; |
| |
| while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) { |
| err = rocker_desc_err(desc_info); |
| if (err) { |
| dev_err(&pdev->dev, "event desc received with err %d\n", |
| err); |
| } else { |
| err = rocker_event_process(rocker, desc_info); |
| if (err) |
| dev_err(&pdev->dev, "event processing failed with err %d\n", |
| err); |
| } |
| rocker_desc_gen_clear(desc_info); |
| rocker_desc_head_set(rocker, &rocker->event_ring, desc_info); |
| credits++; |
| } |
| rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id) |
| { |
| struct rocker_port *rocker_port = dev_id; |
| |
| napi_schedule(&rocker_port->napi_tx); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id) |
| { |
| struct rocker_port *rocker_port = dev_id; |
| |
| napi_schedule(&rocker_port->napi_rx); |
| return IRQ_HANDLED; |
| } |
| |
| /******************** |
| * Command interface |
| ********************/ |
| |
| int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait, |
| rocker_cmd_prep_cb_t prepare, void *prepare_priv, |
| rocker_cmd_proc_cb_t process, void *process_priv) |
| { |
| struct rocker *rocker = rocker_port->rocker; |
| struct rocker_desc_info *desc_info; |
| struct rocker_wait *wait; |
| unsigned long lock_flags; |
| int err; |
| |
| spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags); |
| |
| desc_info = rocker_desc_head_get(&rocker->cmd_ring); |
| if (!desc_info) { |
| spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags); |
| return -EAGAIN; |
| } |
| |
| wait = rocker_desc_cookie_ptr_get(desc_info); |
| rocker_wait_init(wait); |
| wait->nowait = nowait; |
| |
| err = prepare(rocker_port, desc_info, prepare_priv); |
| if (err) { |
| spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags); |
| return err; |
| } |
| |
| rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info); |
| |
| spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags); |
| |
| if (nowait) |
| return 0; |
| |
| if (!rocker_wait_event_timeout(wait, HZ / 10)) |
| return -EIO; |
| |
| err = rocker_desc_err(desc_info); |
| if (err) |
| return err; |
| |
| if (process) |
| err = process(rocker_port, desc_info, process_priv); |
| |
| rocker_desc_gen_clear(desc_info); |
| return err; |
| } |
| |
| static int |
| rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| struct rocker_tlv *cmd_info; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS)) |
| return -EMSGSIZE; |
| cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_info) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| rocker_tlv_nest_end(desc_info, cmd_info); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| struct ethtool_link_ksettings *ecmd = priv; |
| const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1]; |
| const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1]; |
| u32 speed; |
| u8 duplex; |
| u8 autoneg; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_CMD_INFO]) |
| return -EIO; |
| |
| rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX, |
| attrs[ROCKER_TLV_CMD_INFO]); |
| if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] || |
| !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] || |
| !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]) |
| return -EIO; |
| |
| speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]); |
| duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]); |
| autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]); |
| |
| ethtool_link_ksettings_zero_link_mode(ecmd, supported); |
| ethtool_link_ksettings_add_link_mode(ecmd, supported, TP); |
| |
| ecmd->base.phy_address = 0xff; |
| ecmd->base.port = PORT_TP; |
| ecmd->base.speed = speed; |
| ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF; |
| ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE; |
| |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| unsigned char *macaddr = priv; |
| const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1]; |
| const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1]; |
| const struct rocker_tlv *attr; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_CMD_INFO]) |
| return -EIO; |
| |
| rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX, |
| attrs[ROCKER_TLV_CMD_INFO]); |
| attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR]; |
| if (!attr) |
| return -EIO; |
| |
| if (rocker_tlv_len(attr) != ETH_ALEN) |
| return -EINVAL; |
| |
| ether_addr_copy(macaddr, rocker_tlv_data(attr)); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| u8 *p_mode = priv; |
| const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1]; |
| const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1]; |
| const struct rocker_tlv *attr; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_CMD_INFO]) |
| return -EIO; |
| |
| rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX, |
| attrs[ROCKER_TLV_CMD_INFO]); |
| attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]; |
| if (!attr) |
| return -EIO; |
| |
| *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]); |
| return 0; |
| } |
| |
| struct port_name { |
| char *buf; |
| size_t len; |
| }; |
| |
| static int |
| rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1]; |
| const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1]; |
| struct port_name *name = priv; |
| const struct rocker_tlv *attr; |
| size_t i, j, len; |
| const char *str; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_CMD_INFO]) |
| return -EIO; |
| |
| rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX, |
| attrs[ROCKER_TLV_CMD_INFO]); |
| attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME]; |
| if (!attr) |
| return -EIO; |
| |
| len = min_t(size_t, rocker_tlv_len(attr), name->len); |
| str = rocker_tlv_data(attr); |
| |
| /* make sure name only contains alphanumeric characters */ |
| for (i = j = 0; i < len; ++i) { |
| if (isalnum(str[i])) { |
| name->buf[j] = str[i]; |
| j++; |
| } |
| } |
| |
| if (j == 0) |
| return -EIO; |
| |
| name->buf[j] = '\0'; |
| |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| struct ethtool_link_ksettings *ecmd = priv; |
| struct rocker_tlv *cmd_info; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS)) |
| return -EMSGSIZE; |
| cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_info) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED, |
| ecmd->base.speed)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX, |
| ecmd->base.duplex)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG, |
| ecmd->base.autoneg)) |
| return -EMSGSIZE; |
| rocker_tlv_nest_end(desc_info, cmd_info); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| const unsigned char *macaddr = priv; |
| struct rocker_tlv *cmd_info; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS)) |
| return -EMSGSIZE; |
| cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_info) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR, |
| ETH_ALEN, macaddr)) |
| return -EMSGSIZE; |
| rocker_tlv_nest_end(desc_info, cmd_info); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| int mtu = *(int *)priv; |
| struct rocker_tlv *cmd_info; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS)) |
| return -EMSGSIZE; |
| cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_info) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU, |
| mtu)) |
| return -EMSGSIZE; |
| rocker_tlv_nest_end(desc_info, cmd_info); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| bool learning = *(bool *)priv; |
| struct rocker_tlv *cmd_info; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS)) |
| return -EMSGSIZE; |
| cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_info) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING, |
| learning)) |
| return -EMSGSIZE; |
| rocker_tlv_nest_end(desc_info, cmd_info); |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port, |
| struct ethtool_link_ksettings *ecmd) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_get_port_settings_prep, NULL, |
| rocker_cmd_get_port_settings_ethtool_proc, |
| ecmd); |
| } |
| |
| static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port, |
| unsigned char *macaddr) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_get_port_settings_prep, NULL, |
| rocker_cmd_get_port_settings_macaddr_proc, |
| macaddr); |
| } |
| |
| static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port, |
| u8 *p_mode) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_get_port_settings_prep, NULL, |
| rocker_cmd_get_port_settings_mode_proc, p_mode); |
| } |
| |
| static int |
| rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port, |
| const struct ethtool_link_ksettings *ecmd) |
| { |
| struct ethtool_link_ksettings copy_ecmd; |
| |
| memcpy(©_ecmd, ecmd, sizeof(copy_ecmd)); |
| |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_set_port_settings_ethtool_prep, |
| ©_ecmd, NULL, NULL); |
| } |
| |
| static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port, |
| unsigned char *macaddr) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_set_port_settings_macaddr_prep, |
| macaddr, NULL, NULL); |
| } |
| |
| static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port, |
| int mtu) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_set_port_settings_mtu_prep, |
| &mtu, NULL, NULL); |
| } |
| |
| int rocker_port_set_learning(struct rocker_port *rocker_port, |
| bool learning) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_set_port_learning_prep, |
| &learning, NULL, NULL); |
| } |
| |
| /********************** |
| * Worlds manipulation |
| **********************/ |
| |
| static struct rocker_world_ops *rocker_world_ops[] = { |
| &rocker_ofdpa_ops, |
| }; |
| |
| #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops) |
| |
| static struct rocker_world_ops *rocker_world_ops_find(u8 mode) |
| { |
| int i; |
| |
| for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++) |
| if (rocker_world_ops[i]->mode == mode) |
| return rocker_world_ops[i]; |
| return NULL; |
| } |
| |
| static int rocker_world_init(struct rocker *rocker, u8 mode) |
| { |
| struct rocker_world_ops *wops; |
| int err; |
| |
| wops = rocker_world_ops_find(mode); |
| if (!wops) { |
| dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n", |
| mode); |
| return -EINVAL; |
| } |
| rocker->wops = wops; |
| rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL); |
| if (!rocker->wpriv) |
| return -ENOMEM; |
| if (!wops->init) |
| return 0; |
| err = wops->init(rocker); |
| if (err) |
| kfree(rocker->wpriv); |
| return err; |
| } |
| |
| static void rocker_world_fini(struct rocker *rocker) |
| { |
| struct rocker_world_ops *wops = rocker->wops; |
| |
| if (!wops || !wops->fini) |
| return; |
| wops->fini(rocker); |
| kfree(rocker->wpriv); |
| } |
| |
| static int rocker_world_check_init(struct rocker_port *rocker_port) |
| { |
| struct rocker *rocker = rocker_port->rocker; |
| u8 mode; |
| int err; |
| |
| err = rocker_cmd_get_port_settings_mode(rocker_port, &mode); |
| if (err) { |
| dev_err(&rocker->pdev->dev, "failed to get port mode\n"); |
| return err; |
| } |
| if (rocker->wops) { |
| if (rocker->wops->mode != mode) { |
| dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n"); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| return rocker_world_init(rocker, mode); |
| } |
| |
| static int rocker_world_port_pre_init(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| int err; |
| |
| rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL); |
| if (!rocker_port->wpriv) |
| return -ENOMEM; |
| if (!wops->port_pre_init) |
| return 0; |
| err = wops->port_pre_init(rocker_port); |
| if (err) |
| kfree(rocker_port->wpriv); |
| return 0; |
| } |
| |
| static int rocker_world_port_init(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_init) |
| return 0; |
| return wops->port_init(rocker_port); |
| } |
| |
| static void rocker_world_port_fini(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_fini) |
| return; |
| wops->port_fini(rocker_port); |
| } |
| |
| static void rocker_world_port_post_fini(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_post_fini) |
| return; |
| wops->port_post_fini(rocker_port); |
| kfree(rocker_port->wpriv); |
| } |
| |
| static int rocker_world_port_open(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_open) |
| return 0; |
| return wops->port_open(rocker_port); |
| } |
| |
| static void rocker_world_port_stop(struct rocker_port *rocker_port) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_stop) |
| return; |
| wops->port_stop(rocker_port); |
| } |
| |
| static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port, |
| u8 state) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_attr_stp_state_set) |
| return -EOPNOTSUPP; |
| |
| return wops->port_attr_stp_state_set(rocker_port, state); |
| } |
| |
| static int |
| rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port * |
| rocker_port, |
| unsigned long * |
| p_brport_flags_support) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_attr_bridge_flags_support_get) |
| return -EOPNOTSUPP; |
| return wops->port_attr_bridge_flags_support_get(rocker_port, |
| p_brport_flags_support); |
| } |
| |
| static int |
| rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port, |
| struct switchdev_brport_flags flags) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| unsigned long brport_flags_s; |
| int err; |
| |
| if (!wops->port_attr_bridge_flags_set) |
| return -EOPNOTSUPP; |
| |
| err = rocker_world_port_attr_bridge_flags_support_get(rocker_port, |
| &brport_flags_s); |
| if (err) |
| return err; |
| |
| if (flags.mask & ~brport_flags_s) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int |
| rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port, |
| struct switchdev_brport_flags flags) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_attr_bridge_flags_set) |
| return -EOPNOTSUPP; |
| |
| return wops->port_attr_bridge_flags_set(rocker_port, flags.val); |
| } |
| |
| static int |
| rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port, |
| u32 ageing_time) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_attr_bridge_ageing_time_set) |
| return -EOPNOTSUPP; |
| |
| return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time); |
| } |
| |
| static int |
| rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port, |
| const struct switchdev_obj_port_vlan *vlan) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_obj_vlan_add) |
| return -EOPNOTSUPP; |
| |
| return wops->port_obj_vlan_add(rocker_port, vlan); |
| } |
| |
| static int |
| rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port, |
| const struct switchdev_obj_port_vlan *vlan) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (netif_is_bridge_master(vlan->obj.orig_dev)) |
| return -EOPNOTSUPP; |
| |
| if (!wops->port_obj_vlan_del) |
| return -EOPNOTSUPP; |
| return wops->port_obj_vlan_del(rocker_port, vlan); |
| } |
| |
| static int |
| rocker_world_port_fdb_add(struct rocker_port *rocker_port, |
| struct switchdev_notifier_fdb_info *info) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_obj_fdb_add) |
| return -EOPNOTSUPP; |
| |
| return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr); |
| } |
| |
| static int |
| rocker_world_port_fdb_del(struct rocker_port *rocker_port, |
| struct switchdev_notifier_fdb_info *info) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_obj_fdb_del) |
| return -EOPNOTSUPP; |
| return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr); |
| } |
| |
| static int rocker_world_port_master_linked(struct rocker_port *rocker_port, |
| struct net_device *master, |
| struct netlink_ext_ack *extack) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_master_linked) |
| return -EOPNOTSUPP; |
| return wops->port_master_linked(rocker_port, master, extack); |
| } |
| |
| static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port, |
| struct net_device *master) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_master_unlinked) |
| return -EOPNOTSUPP; |
| return wops->port_master_unlinked(rocker_port, master); |
| } |
| |
| static int rocker_world_port_neigh_update(struct rocker_port *rocker_port, |
| struct neighbour *n) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_neigh_update) |
| return -EOPNOTSUPP; |
| return wops->port_neigh_update(rocker_port, n); |
| } |
| |
| static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port, |
| struct neighbour *n) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_neigh_destroy) |
| return -EOPNOTSUPP; |
| return wops->port_neigh_destroy(rocker_port, n); |
| } |
| |
| static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port, |
| const unsigned char *addr, |
| __be16 vlan_id) |
| { |
| struct rocker_world_ops *wops = rocker_port->rocker->wops; |
| |
| if (!wops->port_ev_mac_vlan_seen) |
| return -EOPNOTSUPP; |
| return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id); |
| } |
| |
| static int rocker_world_fib4_add(struct rocker *rocker, |
| const struct fib_entry_notifier_info *fen_info) |
| { |
| struct rocker_world_ops *wops = rocker->wops; |
| |
| if (!wops->fib4_add) |
| return 0; |
| return wops->fib4_add(rocker, fen_info); |
| } |
| |
| static int rocker_world_fib4_del(struct rocker *rocker, |
| const struct fib_entry_notifier_info *fen_info) |
| { |
| struct rocker_world_ops *wops = rocker->wops; |
| |
| if (!wops->fib4_del) |
| return 0; |
| return wops->fib4_del(rocker, fen_info); |
| } |
| |
| static void rocker_world_fib4_abort(struct rocker *rocker) |
| { |
| struct rocker_world_ops *wops = rocker->wops; |
| |
| if (wops->fib4_abort) |
| wops->fib4_abort(rocker); |
| } |
| |
| /***************** |
| * Net device ops |
| *****************/ |
| |
| static int rocker_port_open(struct net_device *dev) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int err; |
| |
| err = rocker_port_dma_rings_init(rocker_port); |
| if (err) |
| return err; |
| |
| err = request_irq(rocker_msix_tx_vector(rocker_port), |
| rocker_tx_irq_handler, 0, |
| rocker_driver_name, rocker_port); |
| if (err) { |
| netdev_err(rocker_port->dev, "cannot assign tx irq\n"); |
| goto err_request_tx_irq; |
| } |
| |
| err = request_irq(rocker_msix_rx_vector(rocker_port), |
| rocker_rx_irq_handler, 0, |
| rocker_driver_name, rocker_port); |
| if (err) { |
| netdev_err(rocker_port->dev, "cannot assign rx irq\n"); |
| goto err_request_rx_irq; |
| } |
| |
| err = rocker_world_port_open(rocker_port); |
| if (err) { |
| netdev_err(rocker_port->dev, "cannot open port in world\n"); |
| goto err_world_port_open; |
| } |
| |
| napi_enable(&rocker_port->napi_tx); |
| napi_enable(&rocker_port->napi_rx); |
| if (!dev->proto_down) |
| rocker_port_set_enable(rocker_port, true); |
| netif_start_queue(dev); |
| return 0; |
| |
| err_world_port_open: |
| free_irq(rocker_msix_rx_vector(rocker_port), rocker_port); |
| err_request_rx_irq: |
| free_irq(rocker_msix_tx_vector(rocker_port), rocker_port); |
| err_request_tx_irq: |
| rocker_port_dma_rings_fini(rocker_port); |
| return err; |
| } |
| |
| static int rocker_port_stop(struct net_device *dev) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| |
| netif_stop_queue(dev); |
| rocker_port_set_enable(rocker_port, false); |
| napi_disable(&rocker_port->napi_rx); |
| napi_disable(&rocker_port->napi_tx); |
| rocker_world_port_stop(rocker_port); |
| free_irq(rocker_msix_rx_vector(rocker_port), rocker_port); |
| free_irq(rocker_msix_tx_vector(rocker_port), rocker_port); |
| rocker_port_dma_rings_fini(rocker_port); |
| |
| return 0; |
| } |
| |
| static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info) |
| { |
| const struct rocker *rocker = rocker_port->rocker; |
| struct pci_dev *pdev = rocker->pdev; |
| const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1]; |
| struct rocker_tlv *attr; |
| int rem; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_TX_FRAGS]) |
| return; |
| rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) { |
| const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1]; |
| dma_addr_t dma_handle; |
| size_t len; |
| |
| if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG) |
| continue; |
| rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX, |
| attr); |
| if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] || |
| !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]) |
| continue; |
| dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]); |
| len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]); |
| dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE); |
| } |
| } |
| |
| static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| char *buf, size_t buf_len) |
| { |
| const struct rocker *rocker = rocker_port->rocker; |
| struct pci_dev *pdev = rocker->pdev; |
| dma_addr_t dma_handle; |
| struct rocker_tlv *frag; |
| |
| dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE); |
| if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) { |
| if (net_ratelimit()) |
| netdev_err(rocker_port->dev, "failed to dma map tx frag\n"); |
| return -EIO; |
| } |
| frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG); |
| if (!frag) |
| goto unmap_frag; |
| if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR, |
| dma_handle)) |
| goto nest_cancel; |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN, |
| buf_len)) |
| goto nest_cancel; |
| rocker_tlv_nest_end(desc_info, frag); |
| return 0; |
| |
| nest_cancel: |
| rocker_tlv_nest_cancel(desc_info, frag); |
| unmap_frag: |
| dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE); |
| return -EMSGSIZE; |
| } |
| |
| static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| struct rocker *rocker = rocker_port->rocker; |
| struct rocker_desc_info *desc_info; |
| struct rocker_tlv *frags; |
| int i; |
| int err; |
| |
| desc_info = rocker_desc_head_get(&rocker_port->tx_ring); |
| if (unlikely(!desc_info)) { |
| if (net_ratelimit()) |
| netdev_err(dev, "tx ring full when queue awake\n"); |
| return NETDEV_TX_BUSY; |
| } |
| |
| rocker_desc_cookie_ptr_set(desc_info, skb); |
| |
| frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS); |
| if (!frags) |
| goto out; |
| err = rocker_tx_desc_frag_map_put(rocker_port, desc_info, |
| skb->data, skb_headlen(skb)); |
| if (err) |
| goto nest_cancel; |
| if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) { |
| err = skb_linearize(skb); |
| if (err) |
| goto unmap_frags; |
| } |
| |
| for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| |
| err = rocker_tx_desc_frag_map_put(rocker_port, desc_info, |
| skb_frag_address(frag), |
| skb_frag_size(frag)); |
| if (err) |
| goto unmap_frags; |
| } |
| rocker_tlv_nest_end(desc_info, frags); |
| |
| rocker_desc_gen_clear(desc_info); |
| rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info); |
| |
| desc_info = rocker_desc_head_get(&rocker_port->tx_ring); |
| if (!desc_info) |
| netif_stop_queue(dev); |
| |
| return NETDEV_TX_OK; |
| |
| unmap_frags: |
| rocker_tx_desc_frags_unmap(rocker_port, desc_info); |
| nest_cancel: |
| rocker_tlv_nest_cancel(desc_info, frags); |
| out: |
| dev_kfree_skb(skb); |
| dev->stats.tx_dropped++; |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static int rocker_port_set_mac_address(struct net_device *dev, void *p) |
| { |
| struct sockaddr *addr = p; |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int err; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data); |
| if (err) |
| return err; |
| eth_hw_addr_set(dev, addr->sa_data); |
| return 0; |
| } |
| |
| static int rocker_port_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int running = netif_running(dev); |
| int err; |
| |
| if (running) |
| rocker_port_stop(dev); |
| |
| netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu); |
| dev->mtu = new_mtu; |
| |
| err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu); |
| if (err) |
| return err; |
| |
| if (running) |
| err = rocker_port_open(dev); |
| |
| return err; |
| } |
| |
| static int rocker_port_get_phys_port_name(struct net_device *dev, |
| char *buf, size_t len) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| struct port_name name = { .buf = buf, .len = len }; |
| int err; |
| |
| err = rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_get_port_settings_prep, NULL, |
| rocker_cmd_get_port_settings_phys_name_proc, |
| &name); |
| |
| return err ? -EOPNOTSUPP : 0; |
| } |
| |
| static int rocker_port_change_proto_down(struct net_device *dev, |
| bool proto_down) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| |
| if (rocker_port->dev->flags & IFF_UP) |
| rocker_port_set_enable(rocker_port, !proto_down); |
| rocker_port->dev->proto_down = proto_down; |
| return 0; |
| } |
| |
| static void rocker_port_neigh_destroy(struct net_device *dev, |
| struct neighbour *n) |
| { |
| struct rocker_port *rocker_port = netdev_priv(n->dev); |
| int err; |
| |
| err = rocker_world_port_neigh_destroy(rocker_port, n); |
| if (err) |
| netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n", |
| err); |
| } |
| |
| static int rocker_port_get_port_parent_id(struct net_device *dev, |
| struct netdev_phys_item_id *ppid) |
| { |
| const struct rocker_port *rocker_port = netdev_priv(dev); |
| const struct rocker *rocker = rocker_port->rocker; |
| |
| ppid->id_len = sizeof(rocker->hw.id); |
| memcpy(&ppid->id, &rocker->hw.id, ppid->id_len); |
| |
| return 0; |
| } |
| |
| static const struct net_device_ops rocker_port_netdev_ops = { |
| .ndo_open = rocker_port_open, |
| .ndo_stop = rocker_port_stop, |
| .ndo_start_xmit = rocker_port_xmit, |
| .ndo_set_mac_address = rocker_port_set_mac_address, |
| .ndo_change_mtu = rocker_port_change_mtu, |
| .ndo_get_phys_port_name = rocker_port_get_phys_port_name, |
| .ndo_change_proto_down = rocker_port_change_proto_down, |
| .ndo_neigh_destroy = rocker_port_neigh_destroy, |
| .ndo_get_port_parent_id = rocker_port_get_port_parent_id, |
| }; |
| |
| /******************** |
| * swdev interface |
| ********************/ |
| |
| static int rocker_port_attr_set(struct net_device *dev, |
| const struct switchdev_attr *attr) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int err = 0; |
| |
| switch (attr->id) { |
| case SWITCHDEV_ATTR_ID_PORT_STP_STATE: |
| err = rocker_world_port_attr_stp_state_set(rocker_port, |
| attr->u.stp_state); |
| break; |
| case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: |
| err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port, |
| attr->u.brport_flags); |
| break; |
| case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: |
| err = rocker_world_port_attr_bridge_flags_set(rocker_port, |
| attr->u.brport_flags); |
| break; |
| case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: |
| err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port, |
| attr->u.ageing_time); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int rocker_port_obj_add(struct net_device *dev, |
| const struct switchdev_obj *obj) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int err = 0; |
| |
| switch (obj->id) { |
| case SWITCHDEV_OBJ_ID_PORT_VLAN: |
| err = rocker_world_port_obj_vlan_add(rocker_port, |
| SWITCHDEV_OBJ_PORT_VLAN(obj)); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int rocker_port_obj_del(struct net_device *dev, |
| const struct switchdev_obj *obj) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| int err = 0; |
| |
| switch (obj->id) { |
| case SWITCHDEV_OBJ_ID_PORT_VLAN: |
| err = rocker_world_port_obj_vlan_del(rocker_port, |
| SWITCHDEV_OBJ_PORT_VLAN(obj)); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| struct rocker_fib_event_work { |
| struct work_struct work; |
| union { |
| struct fib_entry_notifier_info fen_info; |
| struct fib_rule_notifier_info fr_info; |
| }; |
| struct rocker *rocker; |
| unsigned long event; |
| }; |
| |
| static void rocker_router_fib_event_work(struct work_struct *work) |
| { |
| struct rocker_fib_event_work *fib_work = |
| container_of(work, struct rocker_fib_event_work, work); |
| struct rocker *rocker = fib_work->rocker; |
| struct fib_rule *rule; |
| int err; |
| |
| /* Protect internal structures from changes */ |
| rtnl_lock(); |
| switch (fib_work->event) { |
| case FIB_EVENT_ENTRY_REPLACE: |
| err = rocker_world_fib4_add(rocker, &fib_work->fen_info); |
| if (err) |
| rocker_world_fib4_abort(rocker); |
| fib_info_put(fib_work->fen_info.fi); |
| break; |
| case FIB_EVENT_ENTRY_DEL: |
| rocker_world_fib4_del(rocker, &fib_work->fen_info); |
| fib_info_put(fib_work->fen_info.fi); |
| break; |
| case FIB_EVENT_RULE_ADD: |
| case FIB_EVENT_RULE_DEL: |
| rule = fib_work->fr_info.rule; |
| if (!fib4_rule_default(rule)) |
| rocker_world_fib4_abort(rocker); |
| fib_rule_put(rule); |
| break; |
| } |
| rtnl_unlock(); |
| kfree(fib_work); |
| } |
| |
| /* Called with rcu_read_lock() */ |
| static int rocker_router_fib_event(struct notifier_block *nb, |
| unsigned long event, void *ptr) |
| { |
| struct rocker *rocker = container_of(nb, struct rocker, fib_nb); |
| struct rocker_fib_event_work *fib_work; |
| struct fib_notifier_info *info = ptr; |
| |
| if (info->family != AF_INET) |
| return NOTIFY_DONE; |
| |
| fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); |
| if (WARN_ON(!fib_work)) |
| return NOTIFY_BAD; |
| |
| INIT_WORK(&fib_work->work, rocker_router_fib_event_work); |
| fib_work->rocker = rocker; |
| fib_work->event = event; |
| |
| switch (event) { |
| case FIB_EVENT_ENTRY_REPLACE: |
| case FIB_EVENT_ENTRY_DEL: |
| if (info->family == AF_INET) { |
| struct fib_entry_notifier_info *fen_info = ptr; |
| |
| if (fen_info->fi->fib_nh_is_v6) { |
| NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); |
| kfree(fib_work); |
| return notifier_from_errno(-EINVAL); |
| } |
| if (fen_info->fi->nh) { |
| NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); |
| kfree(fib_work); |
| return notifier_from_errno(-EINVAL); |
| } |
| } |
| |
| memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info)); |
| /* Take referece on fib_info to prevent it from being |
| * freed while work is queued. Release it afterwards. |
| */ |
| fib_info_hold(fib_work->fen_info.fi); |
| break; |
| case FIB_EVENT_RULE_ADD: |
| case FIB_EVENT_RULE_DEL: |
| memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info)); |
| fib_rule_get(fib_work->fr_info.rule); |
| break; |
| } |
| |
| queue_work(rocker->rocker_owq, &fib_work->work); |
| |
| return NOTIFY_DONE; |
| } |
| |
| /******************** |
| * ethtool interface |
| ********************/ |
| |
| static int |
| rocker_port_get_link_ksettings(struct net_device *dev, |
| struct ethtool_link_ksettings *ecmd) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| |
| return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd); |
| } |
| |
| static int |
| rocker_port_set_link_ksettings(struct net_device *dev, |
| const struct ethtool_link_ksettings *ecmd) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| |
| return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd); |
| } |
| |
| static void rocker_port_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *drvinfo) |
| { |
| strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver)); |
| strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); |
| } |
| |
| static struct rocker_port_stats { |
| char str[ETH_GSTRING_LEN]; |
| int type; |
| } rocker_port_stats[] = { |
| { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, }, |
| { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, }, |
| { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, }, |
| { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, }, |
| |
| { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, }, |
| { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, }, |
| { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, }, |
| { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, }, |
| }; |
| |
| #define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats) |
| |
| static void rocker_port_get_strings(struct net_device *netdev, u32 stringset, |
| u8 *data) |
| { |
| u8 *p = data; |
| int i; |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) { |
| memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN); |
| p += ETH_GSTRING_LEN; |
| } |
| break; |
| } |
| } |
| |
| static int |
| rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| struct rocker_tlv *cmd_stats; |
| |
| if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, |
| ROCKER_TLV_CMD_TYPE_GET_PORT_STATS)) |
| return -EMSGSIZE; |
| |
| cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); |
| if (!cmd_stats) |
| return -EMSGSIZE; |
| |
| if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT, |
| rocker_port->pport)) |
| return -EMSGSIZE; |
| |
| rocker_tlv_nest_end(desc_info, cmd_stats); |
| |
| return 0; |
| } |
| |
| static int |
| rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port, |
| const struct rocker_desc_info *desc_info, |
| void *priv) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1]; |
| const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1]; |
| const struct rocker_tlv *pattr; |
| u32 pport; |
| u64 *data = priv; |
| int i; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info); |
| |
| if (!attrs[ROCKER_TLV_CMD_INFO]) |
| return -EIO; |
| |
| rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX, |
| attrs[ROCKER_TLV_CMD_INFO]); |
| |
| if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]) |
| return -EIO; |
| |
| pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]); |
| if (pport != rocker_port->pport) |
| return -EIO; |
| |
| for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) { |
| pattr = stats_attrs[rocker_port_stats[i].type]; |
| if (!pattr) |
| continue; |
| |
| data[i] = rocker_tlv_get_u64(pattr); |
| } |
| |
| return 0; |
| } |
| |
| static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port, |
| void *priv) |
| { |
| return rocker_cmd_exec(rocker_port, false, |
| rocker_cmd_get_port_stats_prep, NULL, |
| rocker_cmd_get_port_stats_ethtool_proc, |
| priv); |
| } |
| |
| static void rocker_port_get_stats(struct net_device *dev, |
| struct ethtool_stats *stats, u64 *data) |
| { |
| struct rocker_port *rocker_port = netdev_priv(dev); |
| |
| if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i) |
| data[i] = 0; |
| } |
| } |
| |
| static int rocker_port_get_sset_count(struct net_device *netdev, int sset) |
| { |
| switch (sset) { |
| case ETH_SS_STATS: |
| return ROCKER_PORT_STATS_LEN; |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static const struct ethtool_ops rocker_port_ethtool_ops = { |
| .get_drvinfo = rocker_port_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| .get_strings = rocker_port_get_strings, |
| .get_ethtool_stats = rocker_port_get_stats, |
| .get_sset_count = rocker_port_get_sset_count, |
| .get_link_ksettings = rocker_port_get_link_ksettings, |
| .set_link_ksettings = rocker_port_set_link_ksettings, |
| }; |
| |
| /***************** |
| * NAPI interface |
| *****************/ |
| |
| static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi) |
| { |
| return container_of(napi, struct rocker_port, napi_tx); |
| } |
| |
| static int rocker_port_poll_tx(struct napi_struct *napi, int budget) |
| { |
| struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi); |
| const struct rocker *rocker = rocker_port->rocker; |
| const struct rocker_desc_info *desc_info; |
| u32 credits = 0; |
| int err; |
| |
| /* Cleanup tx descriptors */ |
| while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) { |
| struct sk_buff *skb; |
| |
| err = rocker_desc_err(desc_info); |
| if (err && net_ratelimit()) |
| netdev_err(rocker_port->dev, "tx desc received with err %d\n", |
| err); |
| rocker_tx_desc_frags_unmap(rocker_port, desc_info); |
| |
| skb = rocker_desc_cookie_ptr_get(desc_info); |
| if (err == 0) { |
| rocker_port->dev->stats.tx_packets++; |
| rocker_port->dev->stats.tx_bytes += skb->len; |
| } else { |
| rocker_port->dev->stats.tx_errors++; |
| } |
| |
| dev_kfree_skb_any(skb); |
| credits++; |
| } |
| |
| if (credits && netif_queue_stopped(rocker_port->dev)) |
| netif_wake_queue(rocker_port->dev); |
| |
| napi_complete(napi); |
| rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits); |
| |
| return 0; |
| } |
| |
| static int rocker_port_rx_proc(const struct rocker *rocker, |
| const struct rocker_port *rocker_port, |
| struct rocker_desc_info *desc_info) |
| { |
| const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1]; |
| struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info); |
| size_t rx_len; |
| u16 rx_flags = 0; |
| |
| if (!skb) |
| return -ENOENT; |
| |
| rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info); |
| if (!attrs[ROCKER_TLV_RX_FRAG_LEN]) |
| return -EINVAL; |
| if (attrs[ROCKER_TLV_RX_FLAGS]) |
| rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]); |
| |
| rocker_dma_rx_ring_skb_unmap(rocker, attrs); |
| |
| rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]); |
| skb_put(skb, rx_len); |
| skb->protocol = eth_type_trans(skb, rocker_port->dev); |
| |
| if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD) |
| skb->offload_fwd_mark = 1; |
| |
| rocker_port->dev->stats.rx_packets++; |
| rocker_port->dev->stats.rx_bytes += skb->len; |
| |
| netif_receive_skb(skb); |
| |
| return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info); |
| } |
| |
| static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi) |
| { |
| return container_of(napi, struct rocker_port, napi_rx); |
| } |
| |
| static int rocker_port_poll_rx(struct napi_struct *napi, int budget) |
| { |
| struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi); |
| const struct rocker *rocker = rocker_port->rocker; |
| struct rocker_desc_info *desc_info; |
| u32 credits = 0; |
| int err; |
| |
| /* Process rx descriptors */ |
| while (credits < budget && |
| (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) { |
| err = rocker_desc_err(desc_info); |
| if (err) { |
| if (net_ratelimit()) |
| netdev_err(rocker_port->dev, "rx desc received with err %d\n", |
| err); |
| } else { |
| err = rocker_port_rx_proc(rocker, rocker_port, |
| desc_info); |
| if (err && net_ratelimit()) |
| netdev_err(rocker_port->dev, "rx processing failed with err %d\n", |
| err); |
| } |
| if (err) |
| rocker_port->dev->stats.rx_errors++; |
| |
| rocker_desc_gen_clear(desc_info); |
| rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info); |
| credits++; |
| } |
| |
| if (credits < budget) |
| napi_complete_done(napi, credits); |
| |
| rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits); |
| |
| return credits; |
| } |
| |
| /***************** |
| * PCI driver ops |
| *****************/ |
| |
| static void rocker_carrier_init(const struct rocker_port *rocker_port) |
| { |
| const struct rocker *rocker = rocker_port->rocker; |
| u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS); |
| bool link_up; |
| |
| link_up = link_status & (1 << rocker_port->pport); |
| if (link_up) |
| netif_carrier_on(rocker_port->dev); |
| else |
| netif_carrier_off(rocker_port->dev); |
| } |
| |
| static void rocker_remove_ports(struct rocker *rocker) |
| { |
| struct rocker_port *rocker_port; |
| int i; |
| |
| for (i = 0; i < rocker->port_count; i++) { |
| rocker_port = rocker->ports[i]; |
| if (!rocker_port) |
| continue; |
| rocker_world_port_fini(rocker_port); |
| unregister_netdev(rocker_port->dev); |
| rocker_world_port_post_fini(rocker_port); |
| free_netdev(rocker_port->dev); |
| } |
| rocker_world_fini(rocker); |
| kfree(rocker->ports); |
| } |
| |
| static void rocker_port_dev_addr_init(struct rocker_port *rocker_port) |
| { |
| const struct rocker *rocker = rocker_port->rocker; |
| const struct pci_dev *pdev = rocker->pdev; |
| u8 addr[ETH_ALEN]; |
| int err; |
| |
| err = rocker_cmd_get_port_settings_macaddr(rocker_port, addr); |
| if (!err) { |
| eth_hw_addr_set(rocker_port->dev, addr); |
| } else { |
| dev_warn(&pdev->dev, "failed to get mac address, using random\n"); |
| eth_hw_addr_random(rocker_port->dev); |
| } |
| } |
| |
| #define ROCKER_PORT_MIN_MTU ETH_MIN_MTU |
| #define ROCKER_PORT_MAX_MTU 9000 |
| static int rocker_probe_port(struct rocker *rocker, unsigned int port_number) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| struct rocker_port *rocker_port; |
| struct net_device *dev; |
| int err; |
| |
| dev = alloc_etherdev(sizeof(struct rocker_port)); |
| if (!dev) |
| return -ENOMEM; |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| rocker_port = netdev_priv(dev); |
| rocker_port->dev = dev; |
| rocker_port->rocker = rocker; |
| rocker_port->port_number = port_number; |
| rocker_port->pport = port_number + 1; |
| |
| err = rocker_world_check_init(rocker_port); |
| if (err) { |
| dev_err(&pdev->dev, "world init failed\n"); |
| goto err_world_check_init; |
| } |
| |
| rocker_port_dev_addr_init(rocker_port); |
| dev->netdev_ops = &rocker_port_netdev_ops; |
| dev->ethtool_ops = &rocker_port_ethtool_ops; |
| netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx, |
| NAPI_POLL_WEIGHT); |
| netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx, |
| NAPI_POLL_WEIGHT); |
| rocker_carrier_init(rocker_port); |
| |
| dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG; |
| |
| /* MTU range: 68 - 9000 */ |
| dev->min_mtu = ROCKER_PORT_MIN_MTU; |
| dev->max_mtu = ROCKER_PORT_MAX_MTU; |
| |
| err = rocker_world_port_pre_init(rocker_port); |
| if (err) { |
| dev_err(&pdev->dev, "port world pre-init failed\n"); |
| goto err_world_port_pre_init; |
| } |
| err = register_netdev(dev); |
| if (err) { |
| dev_err(&pdev->dev, "register_netdev failed\n"); |
| goto err_register_netdev; |
| } |
| rocker->ports[port_number] = rocker_port; |
| |
| err = rocker_world_port_init(rocker_port); |
| if (err) { |
| dev_err(&pdev->dev, "port world init failed\n"); |
| goto err_world_port_init; |
| } |
| |
| return 0; |
| |
| err_world_port_init: |
| rocker->ports[port_number] = NULL; |
| unregister_netdev(dev); |
| err_register_netdev: |
| rocker_world_port_post_fini(rocker_port); |
| err_world_port_pre_init: |
| err_world_check_init: |
| free_netdev(dev); |
| return err; |
| } |
| |
| static int rocker_probe_ports(struct rocker *rocker) |
| { |
| int i; |
| size_t alloc_size; |
| int err; |
| |
| alloc_size = sizeof(struct rocker_port *) * rocker->port_count; |
| rocker->ports = kzalloc(alloc_size, GFP_KERNEL); |
| if (!rocker->ports) |
| return -ENOMEM; |
| for (i = 0; i < rocker->port_count; i++) { |
| err = rocker_probe_port(rocker, i); |
| if (err) |
| goto remove_ports; |
| } |
| return 0; |
| |
| remove_ports: |
| rocker_remove_ports(rocker); |
| return err; |
| } |
| |
| static int rocker_msix_init(struct rocker *rocker) |
| { |
| struct pci_dev *pdev = rocker->pdev; |
| int msix_entries; |
| int i; |
| int err; |
| |
| msix_entries = pci_msix_vec_count(pdev); |
| if (msix_entries < 0) |
| return msix_entries; |
| |
| if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count)) |
| return -EINVAL; |
| |
| rocker->msix_entries = kmalloc_array(msix_entries, |
| sizeof(struct msix_entry), |
| GFP_KERNEL); |
| if (!rocker->msix_entries) |
| return -ENOMEM; |
| |
| for (i = 0; i < msix_entries; i++) |
| rocker->msix_entries[i].entry = i; |
| |
| err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries); |
| if (err < 0) |
| goto err_enable_msix; |
| |
| return 0; |
| |
| err_enable_msix: |
| kfree(rocker->msix_entries); |
| return err; |
| } |
| |
| static void rocker_msix_fini(const struct rocker *rocker) |
| { |
| pci_disable_msix(rocker->pdev); |
| kfree(rocker->msix_entries); |
| } |
| |
| static bool rocker_port_dev_check(const struct net_device *dev) |
| { |
| return dev->netdev_ops == &rocker_port_netdev_ops; |
| } |
| |
| static int |
| rocker_switchdev_port_attr_set_event(struct net_device *netdev, |
| struct switchdev_notifier_port_attr_info *port_attr_info) |
| { |
| int err; |
| |
| err = rocker_port_attr_set(netdev, port_attr_info->attr); |
| |
| port_attr_info->handled = true; |
| return notifier_from_errno(err); |
| } |
| |
| struct rocker_switchdev_event_work { |
| struct work_struct work; |
| struct switchdev_notifier_fdb_info fdb_info; |
| struct rocker_port *rocker_port; |
| unsigned long event; |
| }; |
| |
| static void |
| rocker_fdb_offload_notify(struct rocker_port *rocker_port, |
| struct switchdev_notifier_fdb_info *recv_info) |
| { |
| struct switchdev_notifier_fdb_info info = {}; |
| |
| info.addr = recv_info->addr; |
| info.vid = recv_info->vid; |
| info.offloaded = true; |
| call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, |
| rocker_port->dev, &info.info, NULL); |
| } |
| |
| static void rocker_switchdev_event_work(struct work_struct *work) |
| { |
| struct rocker_switchdev_event_work *switchdev_work = |
| container_of(work, struct rocker_switchdev_event_work, work); |
| struct rocker_port *rocker_port = switchdev_work->rocker_port; |
| struct switchdev_notifier_fdb_info *fdb_info; |
| int err; |
| |
| rtnl_lock(); |
| switch (switchdev_work->event) { |
| case SWITCHDEV_FDB_ADD_TO_DEVICE: |
| fdb_info = &switchdev_work->fdb_info; |
| if (!fdb_info->added_by_user || fdb_info->is_local) |
| break; |
| err = rocker_world_port_fdb_add(rocker_port, fdb_info); |
| if (err) { |
| netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err); |
| break; |
| } |
| rocker_fdb_offload_notify(rocker_port, fdb_info); |
| break; |
| case SWITCHDEV_FDB_DEL_TO_DEVICE: |
| fdb_info = &switchdev_work->fdb_info; |
| if (!fdb_info->added_by_user || fdb_info->is_local) |
| break; |
| err = rocker_world_port_fdb_del(rocker_port, fdb_info); |
| if (err) |
| netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err); |
| break; |
| } |
| rtnl_unlock(); |
| |
| kfree(switchdev_work->fdb_info.addr); |
| kfree(switchdev_work); |
| dev_put(rocker_port->dev); |
| } |
| |
| /* called under rcu_read_lock() */ |
| static int rocker_switchdev_event(struct notifier_block *unused, |
| unsigned long event, void *ptr) |
| { |
| struct net_device *dev = switchdev_notifier_info_to_dev(ptr); |
| struct rocker_switchdev_event_work *switchdev_work; |
| struct switchdev_notifier_fdb_info *fdb_info = ptr; |
| struct rocker_port *rocker_port; |
| |
| if (!rocker_port_dev_check(dev)) |
| return NOTIFY_DONE; |
| |
| if (event == SWITCHDEV_PORT_ATTR_SET) |
| return rocker_switchdev_port_attr_set_event(dev, ptr); |
| |
| rocker_port = netdev_priv(dev); |
| switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); |
| if (WARN_ON(!switchdev_work)) |
| return NOTIFY_BAD; |
| |
| INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work); |
| switchdev_work->rocker_port = rocker_port; |
| switchdev_work->event = event; |
| |
| switch (event) { |
| case SWITCHDEV_FDB_ADD_TO_DEVICE: |
| case SWITCHDEV_FDB_DEL_TO_DEVICE: |
| memcpy(&switchdev_work->fdb_info, ptr, |
| sizeof(switchdev_work->fdb_info)); |
| switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); |
| if (unlikely(!switchdev_work->fdb_info.addr)) { |
| kfree(switchdev_work); |
| return NOTIFY_BAD; |
| } |
| |
| ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, |
| fdb_info->addr); |
| /* Take a reference on the rocker device */ |
| dev_hold(dev); |
| break; |
| default: |
| kfree(switchdev_work); |
| return NOTIFY_DONE; |
| } |
| |
| queue_work(rocker_port->rocker->rocker_owq, |
| &switchdev_work->work); |
| return NOTIFY_DONE; |
| } |
| |
| static int |
| rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev, |
| struct switchdev_notifier_port_obj_info *port_obj_info) |
| { |
| int err = -EOPNOTSUPP; |
| |
| switch (event) { |
| case SWITCHDEV_PORT_OBJ_ADD: |
| err = rocker_port_obj_add(netdev, port_obj_info->obj); |
| break; |
| case SWITCHDEV_PORT_OBJ_DEL: |
| err = rocker_port_obj_del(netdev, port_obj_info->obj); |
| break; |
| } |
| |
| port_obj_info->handled = true; |
| return notifier_from_errno(err); |
| } |
| |
| static int rocker_switchdev_blocking_event(struct notifier_block *unused, |
| unsigned long event, void *ptr) |
| { |
| struct net_device *dev = switchdev_notifier_info_to_dev(ptr); |
| |
| if (!rocker_port_dev_check(dev)) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case SWITCHDEV_PORT_OBJ_ADD: |
| case SWITCHDEV_PORT_OBJ_DEL: |
| return rocker_switchdev_port_obj_event(event, dev, ptr); |
| case SWITCHDEV_PORT_ATTR_SET: |
| return rocker_switchdev_port_attr_set_event(dev, ptr); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block rocker_switchdev_notifier = { |
| .notifier_call = rocker_switchdev_event, |
| }; |
| |
| static struct notifier_block rocker_switchdev_blocking_notifier = { |
| .notifier_call = rocker_switchdev_blocking_event, |
| }; |
| |
| static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| struct notifier_block *nb; |
| struct rocker *rocker; |
| int err; |
| |
| rocker = kzalloc(sizeof(*rocker), GFP_KERNEL); |
| if (!rocker) |
| return -ENOMEM; |
| |
| err = pci_enable_device(pdev); |
| if (err) { |
| dev_err(&pdev->dev, "pci_enable_device failed\n"); |
| goto err_pci_enable_device; |
| } |
| |
| err = pci_request_regions(pdev, rocker_driver_name); |
| if (err) { |
| dev_err(&pdev->dev, "pci_request_regions failed\n"); |
| goto err_pci_request_regions; |
| } |
| |
| err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| if (!err) { |
| err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
| if (err) { |
| dev_err(&pdev->dev, "dma_set_coherent_mask failed\n"); |
| goto err_pci_set_dma_mask; |
| } |
| } else { |
| err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| if (err) { |
| dev_err(&pdev->dev, "dma_set_mask failed\n"); |
| goto err_pci_set_dma_mask; |
| } |
| } |
| |
| if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) { |
| dev_err(&pdev->dev, "invalid PCI region size\n"); |
| err = -EINVAL; |
| goto err_pci_resource_len_check; |
| } |
| |
| rocker->hw_addr = ioremap(pci_resource_start(pdev, 0), |
| pci_resource_len(pdev, 0)); |
| if (!rocker->hw_addr) { |
| dev_err(&pdev->dev, "ioremap failed\n"); |
| err = -EIO; |
| goto err_ioremap; |
| } |
| pci_set_master(pdev); |
| |
| rocker->pdev = pdev; |
| pci_set_drvdata(pdev, rocker); |
| |
| rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT); |
| |
| err = rocker_msix_init(rocker); |
| if (err) { |
| dev_err(&pdev->dev, "MSI-X init failed\n"); |
| goto err_msix_init; |
| } |
| |
| err = rocker_basic_hw_test(rocker); |
| if (err) { |
| dev_err(&pdev->dev, "basic hw test failed\n"); |
| goto err_basic_hw_test; |
| } |
| |
| rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET); |
| |
| err = rocker_dma_rings_init(rocker); |
| if (err) |
| goto err_dma_rings_init; |
| |
| err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), |
| rocker_cmd_irq_handler, 0, |
| rocker_driver_name, rocker); |
| if (err) { |
| dev_err(&pdev->dev, "cannot assign cmd irq\n"); |
| goto err_request_cmd_irq; |
| } |
| |
| err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), |
| rocker_event_irq_handler, 0, |
| rocker_driver_name, rocker); |
| if (err) { |
| dev_err(&pdev->dev, "cannot assign event irq\n"); |
| goto err_request_event_irq; |
| } |
| |
| rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name, |
| WQ_MEM_RECLAIM); |
| if (!rocker->rocker_owq) { |
| err = -ENOMEM; |
| goto err_alloc_ordered_workqueue; |
| } |
| |
| err = rocker_probe_ports(rocker); |
| if (err) { |
| dev_err(&pdev->dev, "failed to probe ports\n"); |
| goto err_probe_ports; |
| } |
| |
| /* Only FIBs pointing to our own netdevs are programmed into |
| * the device, so no need to pass a callback. |
| */ |
| rocker->fib_nb.notifier_call = rocker_router_fib_event; |
| err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL); |
| if (err) |
| goto err_register_fib_notifier; |
| |
| err = register_switchdev_notifier(&rocker_switchdev_notifier); |
| if (err) { |
| dev_err(&pdev->dev, "Failed to register switchdev notifier\n"); |
| goto err_register_switchdev_notifier; |
| } |
| |
| nb = &rocker_switchdev_blocking_notifier; |
| err = register_switchdev_blocking_notifier(nb); |
| if (err) { |
| dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n"); |
| goto err_register_switchdev_blocking_notifier; |
| } |
| |
| rocker->hw.id = rocker_read64(rocker, SWITCH_ID); |
| |
| dev_info(&pdev->dev, "Rocker switch with id %*phN\n", |
| (int)sizeof(rocker->hw.id), &rocker->hw.id); |
| |
| return 0; |
| |
| err_register_switchdev_blocking_notifier: |
| unregister_switchdev_notifier(&rocker_switchdev_notifier); |
| err_register_switchdev_notifier: |
| unregister_fib_notifier(&init_net, &rocker->fib_nb); |
| err_register_fib_notifier: |
| rocker_remove_ports(rocker); |
| err_probe_ports: |
| destroy_workqueue(rocker->rocker_owq); |
| err_alloc_ordered_workqueue: |
| free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker); |
| err_request_event_irq: |
| free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker); |
| err_request_cmd_irq: |
| rocker_dma_rings_fini(rocker); |
| err_dma_rings_init: |
| err_basic_hw_test: |
| rocker_msix_fini(rocker); |
| err_msix_init: |
| iounmap(rocker->hw_addr); |
| err_ioremap: |
| err_pci_resource_len_check: |
| err_pci_set_dma_mask: |
| pci_release_regions(pdev); |
| err_pci_request_regions: |
| pci_disable_device(pdev); |
| err_pci_enable_device: |
| kfree(rocker); |
| return err; |
| } |
| |
| static void rocker_remove(struct pci_dev *pdev) |
| { |
| struct rocker *rocker = pci_get_drvdata(pdev); |
| struct notifier_block *nb; |
| |
| nb = &rocker_switchdev_blocking_notifier; |
| unregister_switchdev_blocking_notifier(nb); |
| |
| unregister_switchdev_notifier(&rocker_switchdev_notifier); |
| unregister_fib_notifier(&init_net, &rocker->fib_nb); |
| rocker_remove_ports(rocker); |
| rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET); |
| destroy_workqueue(rocker->rocker_owq); |
| free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker); |
| free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker); |
| rocker_dma_rings_fini(rocker); |
| rocker_msix_fini(rocker); |
| iounmap(rocker->hw_addr); |
| pci_release_regions(rocker->pdev); |
| pci_disable_device(rocker->pdev); |
| kfree(rocker); |
| } |
| |
| static struct pci_driver rocker_pci_driver = { |
| .name = rocker_driver_name, |
| .id_table = rocker_pci_id_table, |
| |