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OpenCloudOS-Kernel/drivers/net/ethernet/rocker/rocker_main.c

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/*
* 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>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#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 <net/switchdev.h>
#include <net/rtnetlink.h>
#include <net/netevent.h>
#include <net/arp.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 = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(pdev, 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:
pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
PCI_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)
{
static 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)
{
static 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 = pci_alloc_consistent(rocker->pdev,
info->size * sizeof(*info->desc),
&info->mapaddr);
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);
pci_free_consistent(rocker->pdev,
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 = pci_map_single(pdev, buf, buf_size, direction);
if (pci_dma_mapping_error(pdev, 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];
pci_unmap_single(pdev, 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;
pci_unmap_single(pdev, 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,
PCI_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,
PCI_DMA_FROMDEVICE, 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_ring_bufs_free(rocker, &rocker->cmd_ring,
PCI_DMA_BIDIRECTIONAL);
err_dma_cmd_ring_waits_alloc:
rocker_dma_cmd_ring_waits_free(rocker);
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,
PCI_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,
PCI_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 = pci_map_single(pdev, skb->data, buf_len,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(pdev, 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:
pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
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]);
pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
}
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,
PCI_DMA_TODEVICE,
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,
PCI_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,
PCI_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,
PCI_DMA_TODEVICE);
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,
PCI_DMA_BIDIRECTIONAL);
rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
PCI_DMA_TODEVICE);
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_cmd *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]);
ecmd->transceiver = XCVR_INTERNAL;
ecmd->supported = SUPPORTED_TP;
ecmd->phy_address = 0xff;
ecmd->port = PORT_TP;
ethtool_cmd_speed_set(ecmd, speed);
ecmd->duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
ecmd->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_cmd *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,
ethtool_cmd_speed(ecmd)))
return -EMSGSIZE;
if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
ecmd->duplex))
return -EMSGSIZE;
if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
ecmd->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_cmd *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,
struct ethtool_cmd *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 err;
}
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 switchdev_trans *trans)
{
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, trans);
}
static int
rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
unsigned long brport_flags,
struct switchdev_trans *trans)
{
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, brport_flags,
trans);
}
static int
rocker_world_port_attr_bridge_flags_get(const struct rocker_port *rocker_port,
unsigned long *p_brport_flags)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_attr_bridge_flags_get)
return -EOPNOTSUPP;
return wops->port_attr_bridge_flags_get(rocker_port, p_brport_flags);
}
static int
rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
u32 ageing_time,
struct switchdev_trans *trans)
{
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,
trans);
}
static int
rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
const struct switchdev_obj_port_vlan *vlan,
struct switchdev_trans *trans)
{
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, trans);
}
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 (!wops->port_obj_vlan_del)
return -EOPNOTSUPP;
return wops->port_obj_vlan_del(rocker_port, vlan);
}
static int
rocker_world_port_obj_vlan_dump(const struct rocker_port *rocker_port,
struct switchdev_obj_port_vlan *vlan,
switchdev_obj_dump_cb_t *cb)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_obj_vlan_dump)
return -EOPNOTSUPP;
return wops->port_obj_vlan_dump(rocker_port, vlan, cb);
}
static int
rocker_world_port_obj_fib4_add(struct rocker_port *rocker_port,
const struct switchdev_obj_ipv4_fib *fib4,
struct switchdev_trans *trans)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_obj_fib4_add)
return -EOPNOTSUPP;
return wops->port_obj_fib4_add(rocker_port, fib4, trans);
}
static int
rocker_world_port_obj_fib4_del(struct rocker_port *rocker_port,
const struct switchdev_obj_ipv4_fib *fib4)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_obj_fib4_del)
return -EOPNOTSUPP;
return wops->port_obj_fib4_del(rocker_port, fib4);
}
static int
rocker_world_port_obj_fdb_add(struct rocker_port *rocker_port,
const struct switchdev_obj_port_fdb *fdb,
struct switchdev_trans *trans)
{
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, fdb, trans);
}
static int
rocker_world_port_obj_fdb_del(struct rocker_port *rocker_port,
const struct switchdev_obj_port_fdb *fdb)
{
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, fdb);
}
static int
rocker_world_port_obj_fdb_dump(const struct rocker_port *rocker_port,
struct switchdev_obj_port_fdb *fdb,
switchdev_obj_dump_cb_t *cb)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_obj_fdb_dump)
return -EOPNOTSUPP;
return wops->port_obj_fdb_dump(rocker_port, fdb, cb);
}
static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
struct net_device *master)
{
struct rocker_world_ops *wops = rocker_port->rocker->wops;
if (!wops->port_master_linked)
return -EOPNOTSUPP;
return wops->port_master_linked(rocker_port, master);
}
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);
}
/*****************
* 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]);
pci_unmap_single(pdev, 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 = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
if (unlikely(pci_dma_mapping_error(pdev, 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:
pci_unmap_single(pdev, 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;
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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;
#define ROCKER_PORT_MIN_MTU 68
#define ROCKER_PORT_MAX_MTU 9000
if (new_mtu < ROCKER_PORT_MIN_MTU || new_mtu > ROCKER_PORT_MAX_MTU)
return -EINVAL;
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 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 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_bridge_getlink = switchdev_port_bridge_getlink,
.ndo_bridge_setlink = switchdev_port_bridge_setlink,
.ndo_bridge_dellink = switchdev_port_bridge_dellink,
.ndo_fdb_add = switchdev_port_fdb_add,
.ndo_fdb_del = switchdev_port_fdb_del,
.ndo_fdb_dump = switchdev_port_fdb_dump,
.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,
};
/********************
* swdev interface
********************/
static int rocker_port_attr_get(struct net_device *dev,
struct switchdev_attr *attr)
{
const struct rocker_port *rocker_port = netdev_priv(dev);
const struct rocker *rocker = rocker_port->rocker;
int err = 0;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
attr->u.ppid.id_len = sizeof(rocker->hw.id);
memcpy(&attr->u.ppid.id, &rocker->hw.id, attr->u.ppid.id_len);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
err = rocker_world_port_attr_bridge_flags_get(rocker_port,
&attr->u.brport_flags);
break;
default:
return -EOPNOTSUPP;
}
return err;
}
static int rocker_port_attr_set(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
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,
trans);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
err = rocker_world_port_attr_bridge_flags_set(rocker_port,
attr->u.brport_flags,
trans);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
attr->u.ageing_time,
trans);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int rocker_port_obj_add(struct net_device *dev,
const struct switchdev_obj *obj,
struct switchdev_trans *trans)
{
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),
trans);
break;
case SWITCHDEV_OBJ_ID_IPV4_FIB:
err = rocker_world_port_obj_fib4_add(rocker_port,
SWITCHDEV_OBJ_IPV4_FIB(obj),
trans);
break;
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = rocker_world_port_obj_fdb_add(rocker_port,
SWITCHDEV_OBJ_PORT_FDB(obj),
trans);
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;
case SWITCHDEV_OBJ_ID_IPV4_FIB:
err = rocker_world_port_obj_fib4_del(rocker_port,
SWITCHDEV_OBJ_IPV4_FIB(obj));
break;
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = rocker_world_port_obj_fdb_del(rocker_port,
SWITCHDEV_OBJ_PORT_FDB(obj));
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int rocker_port_obj_dump(struct net_device *dev,
struct switchdev_obj *obj,
switchdev_obj_dump_cb_t *cb)
{
const struct rocker_port *rocker_port = netdev_priv(dev);
int err = 0;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = rocker_world_port_obj_fdb_dump(rocker_port,
SWITCHDEV_OBJ_PORT_FDB(obj),
cb);
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = rocker_world_port_obj_vlan_dump(rocker_port,
SWITCHDEV_OBJ_PORT_VLAN(obj),
cb);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static const struct switchdev_ops rocker_port_switchdev_ops = {
.switchdev_port_attr_get = rocker_port_attr_get,
.switchdev_port_attr_set = rocker_port_attr_set,
.switchdev_port_obj_add = rocker_port_obj_add,
.switchdev_port_obj_del = rocker_port_obj_del,
.switchdev_port_obj_dump = rocker_port_obj_dump,
};
/********************
* ethtool interface
********************/
static int rocker_port_get_settings(struct net_device *dev,
struct ethtool_cmd *ecmd)
{
struct rocker_port *rocker_port = netdev_priv(dev);
return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
}
static int rocker_port_set_settings(struct net_device *dev,
struct ethtool_cmd *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_settings = rocker_port_get_settings,
.set_settings = rocker_port_set_settings,
.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,
};
/*****************
* 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 = rocker_port->dev->offload_fwd_mark;
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(napi);
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;
int err;
err = rocker_cmd_get_port_settings_macaddr(rocker_port,
rocker_port->dev->dev_addr);
if (err) {
dev_warn(&pdev->dev, "failed to get mac address, using random\n");
eth_hw_addr_random(rocker_port->dev);
}
}
static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
{
const 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;
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;
dev->switchdev_ops = &rocker_port_switchdev_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;
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 int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (!err) {
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
goto err_pci_set_dma_mask;
}
} else {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "pci_set_dma_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->hw.id = rocker_read64(rocker, SWITCH_ID);
err = rocker_probe_ports(rocker);
if (err) {
dev_err(&pdev->dev, "failed to probe ports\n");
goto err_probe_ports;
}
dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
(int)sizeof(rocker->hw.id), &rocker->hw.id);
return 0;
err_probe_ports:
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);
rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
rocker_remove_ports(rocker);
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,
.probe = rocker_probe,
.remove = rocker_remove,
};
/************************************
* Net device notifier event handler
************************************/
static bool rocker_port_dev_check(const struct net_device *dev)
{
return dev->netdev_ops == &rocker_port_netdev_ops;
}
static int rocker_netdevice_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct netdev_notifier_changeupper_info *info;
struct rocker_port *rocker_port;
int err;
if (!rocker_port_dev_check(dev))
return NOTIFY_DONE;
switch (event) {
case NETDEV_CHANGEUPPER:
info = ptr;
if (!info->master)
goto out;
rocker_port = netdev_priv(dev);
if (info->linking) {
err = rocker_world_port_master_linked(rocker_port,
info->upper_dev);
if (err)
netdev_warn(dev, "failed to reflect master linked (err %d)\n",
err);
} else {
err = rocker_world_port_master_unlinked(rocker_port,
info->upper_dev);
if (err)
netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
err);
}
}
out:
return NOTIFY_DONE;
}
static struct notifier_block rocker_netdevice_nb __read_mostly = {
.notifier_call = rocker_netdevice_event,
};
/************************************
* Net event notifier event handler
************************************/
static int rocker_netevent_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct rocker_port *rocker_port;
struct net_device *dev;
struct neighbour *n = ptr;
int err;
switch (event) {
case NETEVENT_NEIGH_UPDATE:
if (n->tbl != &arp_tbl)
return NOTIFY_DONE;
dev = n->dev;
if (!rocker_port_dev_check(dev))
return NOTIFY_DONE;
rocker_port = netdev_priv(dev);
err = rocker_world_port_neigh_update(rocker_port, n);
if (err)
netdev_warn(dev, "failed to handle neigh update (err %d)\n",
err);
break;
}
return NOTIFY_DONE;
}
static struct notifier_block rocker_netevent_nb __read_mostly = {
.notifier_call = rocker_netevent_event,
};
/***********************
* Module init and exit
***********************/
static int __init rocker_module_init(void)
{
int err;
register_netdevice_notifier(&rocker_netdevice_nb);
register_netevent_notifier(&rocker_netevent_nb);
err = pci_register_driver(&rocker_pci_driver);
if (err)
goto err_pci_register_driver;
return 0;
err_pci_register_driver:
unregister_netevent_notifier(&rocker_netevent_nb);
unregister_netdevice_notifier(&rocker_netdevice_nb);
return err;
}
static void __exit rocker_module_exit(void)
{
unregister_netevent_notifier(&rocker_netevent_nb);
unregister_netdevice_notifier(&rocker_netdevice_nb);
pci_unregister_driver(&rocker_pci_driver);
}
module_init(rocker_module_init);
module_exit(rocker_module_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
MODULE_DESCRIPTION("Rocker switch device driver");
MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
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