static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct skb_frag_struct *skb_frags;
struct mlx4_en_rx_desc *rx_desc;
dma_addr_t dma;
int index;
int nr;
mlx4_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n",
ring->cons, ring->prod);
/* Unmap and free Rx buffers */
BUG_ON((u32) (ring->prod - ring->cons) > ring->size);
while (ring->cons != ring->prod) {
index = ring->cons & ring->size_mask;
rx_desc = ring->buf + (index << ring->log_stride);
skb_frags = ring->rx_info + (index << priv->log_rx_info);
mlx4_dbg(DRV, priv, "Processing descriptor:%d\n", index);
for (nr = 0; nr < priv->num_frags; nr++) {
mlx4_dbg(DRV, priv, "Freeing fragment:%d\n", nr);
dma = be64_to_cpu(rx_desc->data[nr].addr);
mlx4_dbg(DRV, priv, "Unmaping buffer at dma:0x%llx\n", (u64) dma);
pci_unmap_single(mdev->pdev, dma, skb_frags[nr].size,
PCI_DMA_FROMDEVICE);
put_page(skb_frags[nr].page);
}
++ring->cons;
}
}
int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
{
struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
int i, err = 0;
int free = -1;
mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
mutex_lock(&table->mutex);
for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
if (free < 0 && !table->refs[i]) {
free = i;
continue;
}
if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
/* MAC already registered, increase refernce count */
*index = i;
++table->refs[i];
goto out;
}
}
if (free < 0) {
err = -ENOMEM;
goto out;
}
mlx4_dbg(dev, "Free MAC index is %d\n", free);
if (table->total == table->max) {
/* No free mac entries */
err = -ENOSPC;
goto out;
}
/* Register new MAC */
table->refs[free] = 1;
table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
err = mlx4_set_port_mac_table(dev, port, table->entries);
if (unlikely(err)) {
mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
table->refs[free] = 0;
table->entries[free] = 0;
goto out;
}
*index = free;
++table->total;
out:
mutex_unlock(&table->mutex);
return err;
}
/* Calculate rss size and map each entry in rss table to rx ring */
void mlx4_en_set_default_rss_map(struct mlx4_en_priv *priv,
struct mlx4_en_rss_map *rss_map,
int num_entries, int num_rings)
{
int i;
rss_map->size = roundup_pow_of_two(num_entries);
mlx4_dbg(DRV, priv, "Setting default RSS map of %d entires\n",
rss_map->size);
for (i = 0; i < rss_map->size; i++) {
rss_map->map[i] = i % num_rings;
mlx4_dbg(DRV, priv, "Entry %d ---> ring %d\n", i, rss_map->map[i]);
}
}
void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
{
struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
if (index < MLX4_VLAN_REGULAR) {
mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
return;
}
mutex_lock(&table->mutex);
if (!table->refs[index]) {
mlx4_warn(dev, "No vlan entry for index %d\n", index);
goto out;
}
if (--table->refs[index]) {
mlx4_dbg(dev, "Have more references for index %d,"
"no need to modify vlan table\n", index);
goto out;
}
table->entries[index] = 0;
mlx4_set_port_vlan_table(dev, port, table->entries);
--table->total;
out:
mutex_unlock(&table->mutex);
}
static int mlx4_en_init_allocator(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring)
{
struct mlx4_en_rx_alloc *page_alloc;
int i;
for (i = 0; i < priv->num_frags; i++) {
page_alloc = &ring->page_alloc[i];
page_alloc->page = alloc_pages(GFP_ATOMIC | __GFP_COMP,
MLX4_EN_ALLOC_ORDER);
if (!page_alloc->page)
goto out;
page_alloc->offset = priv->frag_info[i].frag_align;
mlx4_dbg(DRV, priv, "Initialized allocator:%d with page:%p\n",
i, page_alloc->page);
}
return 0;
out:
while (i--) {
page_alloc = &ring->page_alloc[i];
put_page(page_alloc->page);
page_alloc->page = NULL;
}
return -ENOMEM;
}
int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring, u32 size, u16 stride)
{
struct mlx4_en_dev *mdev = priv->mdev;
int err;
int tmp;
/* Sanity check SRQ size before proceeding */
if (size >= mdev->dev->caps.max_srq_wqes)
return -EINVAL;
ring->prod = 0;
ring->cons = 0;
ring->size = size;
ring->size_mask = size - 1;
ring->stride = stride;
ring->log_stride = ffs(ring->stride) - 1;
ring->buf_size = ring->size * ring->stride;
tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS *
sizeof(struct skb_frag_struct));
ring->rx_info = vmalloc(tmp);
if (!ring->rx_info) {
mlx4_err(mdev, "Failed allocating rx_info ring\n");
return -ENOMEM;
}
mlx4_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n",
ring->rx_info, tmp);
err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres,
ring->buf_size, 2 * PAGE_SIZE);
if (err)
goto err_ring;
err = mlx4_en_map_buffer(&ring->wqres.buf);
if (err) {
mlx4_err(mdev, "Failed to map RX buffer\n");
goto err_hwq;
}
ring->buf = ring->wqres.buf.direct.buf;
/* Allocate LRO sessions */
if (mlx4_en_lro_init(ring, mdev->profile.num_lro)) {
mlx4_err(mdev, "Failed allocating lro sessions\n");
goto err_map;
}
return 0;
err_map:
mlx4_en_unmap_buffer(&ring->wqres.buf);
err_hwq:
mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size);
err_ring:
vfree(ring->rx_info);
ring->rx_info = NULL;
return err;
}
/* Calculate the last offset position that accomodates a full fragment
* (assuming fagment size = stride-align) */
static int mlx4_en_last_alloc_offset(struct mlx4_en_priv *priv, u16 stride, u16 align)
{
u16 res = MLX4_EN_ALLOC_SIZE % stride;
u16 offset = MLX4_EN_ALLOC_SIZE - stride - res + align;
mlx4_dbg(DRV, priv, "Calculated last offset for stride:%d align:%d "
"res:%d offset:%d\n", stride, align, res, offset);
return offset;
}
struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
struct mlx4_en_rx_desc *rx_desc,
struct skb_frag_struct *skb_frags,
struct mlx4_en_rx_alloc *page_alloc,
unsigned int length)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct sk_buff *skb;
void *va;
int used_frags;
dma_addr_t dma;
skb = dev_alloc_skb(SMALL_PACKET_SIZE + NET_IP_ALIGN);
if (!skb) {
mlx4_dbg(RX_ERR, priv, "Failed allocating skb\n");
return NULL;
}
skb->dev = priv->dev;
skb_reserve(skb, NET_IP_ALIGN);
skb->len = length;
skb->truesize = length + sizeof(struct sk_buff);
/* Get pointer to first fragment so we could copy the headers into the
* (linear part of the) skb */
va = page_address(skb_frags[0].page) + skb_frags[0].page_offset;
if (length <= SMALL_PACKET_SIZE) {
/* We are copying all relevant data to the skb - temporarily
* synch buffers for the copy */
dma = be64_to_cpu(rx_desc->data[0].addr);
dma_sync_single_range_for_cpu(&mdev->pdev->dev, dma, 0,
length, DMA_FROM_DEVICE);
skb_copy_to_linear_data(skb, va, length);
dma_sync_single_range_for_device(&mdev->pdev->dev, dma, 0,
length, DMA_FROM_DEVICE);
skb->tail += length;
} else {
/* Move relevant fragments to skb */
used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, skb_frags,
skb_shinfo(skb)->frags,
page_alloc, length);
skb_shinfo(skb)->nr_frags = used_frags;
/* Copy headers into the skb linear buffer */
memcpy(skb->data, va, HEADER_COPY_SIZE);
skb->tail += HEADER_COPY_SIZE;
/* Skip headers in first fragment */
skb_shinfo(skb)->frags[0].page_offset += HEADER_COPY_SIZE;
/* Adjust size of first fragment */
skb_shinfo(skb)->frags[0].size -= HEADER_COPY_SIZE;
skb->data_len = length - HEADER_COPY_SIZE;
}
return skb;
}
void mlx4_en_calc_rx_buf(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE;
int buf_size = 0;
int i = 0;
while (buf_size < eff_mtu) {
priv->frag_info[i].frag_size =
(eff_mtu > buf_size + frag_sizes[i]) ?
frag_sizes[i] : eff_mtu - buf_size;
priv->frag_info[i].frag_prefix_size = buf_size;
if (!i) {
priv->frag_info[i].frag_align = NET_IP_ALIGN;
priv->frag_info[i].frag_stride =
ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
} else {
priv->frag_info[i].frag_align = 0;
priv->frag_info[i].frag_stride =
ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
}
priv->frag_info[i].last_offset = mlx4_en_last_alloc_offset(
priv, priv->frag_info[i].frag_stride,
priv->frag_info[i].frag_align);
buf_size += priv->frag_info[i].frag_size;
i++;
}
priv->num_frags = i;
priv->rx_skb_size = eff_mtu;
priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct skb_frag_struct));
mlx4_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d "
"num_frags:%d):\n", eff_mtu, priv->num_frags);
for (i = 0; i < priv->num_frags; i++) {
mlx4_dbg(DRV, priv, " frag:%d - size:%d prefix:%d align:%d "
"stride:%d last_offset:%d\n", i,
priv->frag_info[i].frag_size,
priv->frag_info[i].frag_prefix_size,
priv->frag_info[i].frag_align,
priv->frag_info[i].frag_stride,
priv->frag_info[i].last_offset);
}
}
void mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn)
{
struct mlx4_cq *cq;
cq = radix_tree_lookup(&mlx4_priv(dev)->cq_table.tree,
cqn & (dev->caps.num_cqs - 1));
if (!cq) {
mlx4_dbg(dev, "Completion event for bogus CQ %08x\n", cqn);
return;
}
++cq->arm_sn;
cq->comp(cq);
}
static void mlx4_en_destroy_allocator(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring)
{
struct mlx4_en_rx_alloc *page_alloc;
int i;
for (i = 0; i < priv->num_frags; i++) {
page_alloc = &ring->page_alloc[i];
mlx4_dbg(DRV, priv, "Freeing allocator:%d count:%d\n",
i, page_count(page_alloc->page));
put_page(page_alloc->page);
page_alloc->page = NULL;
}
}
void mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn)
{
struct mlx4_cq *cq;
rcu_read_lock();
cq = radix_tree_lookup(&mlx4_priv(dev)->cq_table.tree,
cqn & (dev->caps.num_cqs - 1));
if (cq)
atomic_inc(&cq->refcount);
rcu_read_unlock();
if (!cq) {
mlx4_dbg(dev, "Completion event for bogus CQ %08x\n", cqn);
return;
}
++cq->arm_sn;
cq->comp(cq);
if (atomic_dec_and_test(&cq->refcount))
complete(&cq->free);
}
int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap)
{
struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
struct mlx4_mac_table *table = &info->mac_table;
struct mlx4_mac_entry *entry;
int i, err = 0;
int free = -1;
if (dev->caps.vep_uc_steering) {
err = mlx4_uc_steer_add(dev, port, mac, qpn, 1);
if (!err) {
entry = kmalloc(sizeof *entry, GFP_KERNEL);
if (!entry) {
mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
return -ENOMEM;
}
entry->mac = mac;
err = radix_tree_insert(&info->mac_tree, *qpn, entry);
if (err) {
mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
return err;
}
} else
return err;
}
mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
mutex_lock(&table->mutex);
for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
if (free < 0 && !table->entries[i]) {
free = i;
continue;
}
if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
/* MAC already registered, Must not have duplicates */
err = -EEXIST;
goto out;
}
}
mlx4_dbg(dev, "Free MAC index is %d\n", free);
if (table->total == table->max) {
/* No free mac entries */
err = -ENOSPC;
goto out;
}
/* Register new MAC */
table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
err = mlx4_set_port_mac_table(dev, port, table->entries);
if (unlikely(err)) {
mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
table->entries[free] = 0;
goto out;
}
if (!dev->caps.vep_uc_steering)
*qpn = info->base_qpn + free;
++table->total;
out:
mutex_unlock(&table->mutex);
return err;
}
static int mlx4_setup_hca(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
int port;
__be32 ib_port_default_caps;
err = mlx4_init_uar_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"user access region table, aborting.\n");
return err;
}
err = mlx4_uar_alloc(dev, &priv->driver_uar);
if (err) {
mlx4_err(dev, "Failed to allocate driver access region, "
"aborting.\n");
goto err_uar_table_free;
}
priv->kar = ioremap(priv->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
if (!priv->kar) {
mlx4_err(dev, "Couldn't map kernel access region, "
"aborting.\n");
err = -ENOMEM;
goto err_uar_free;
}
err = mlx4_init_pd_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"protection domain table, aborting.\n");
goto err_kar_unmap;
}
err = mlx4_init_mr_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"memory region table, aborting.\n");
goto err_pd_table_free;
}
err = mlx4_init_eq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"event queue table, aborting.\n");
goto err_mr_table_free;
}
err = mlx4_cmd_use_events(dev);
if (err) {
mlx4_err(dev, "Failed to switch to event-driven "
"firmware commands, aborting.\n");
goto err_eq_table_free;
}
err = mlx4_NOP(dev);
if (err) {
if (dev->flags & MLX4_FLAG_MSI_X) {
mlx4_warn(dev, "NOP command failed to generate MSI-X "
"interrupt IRQ %d).\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
mlx4_warn(dev, "Trying again without MSI-X.\n");
} else {
mlx4_err(dev, "NOP command failed to generate interrupt "
"(IRQ %d), aborting.\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
}
goto err_cmd_poll;
}
mlx4_dbg(dev, "NOP command IRQ test passed\n");
err = mlx4_init_cq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"completion queue table, aborting.\n");
goto err_cmd_poll;
}
err = mlx4_init_srq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"shared receive queue table, aborting.\n");
goto err_cq_table_free;
}
err = mlx4_init_qp_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"queue pair table, aborting.\n");
goto err_srq_table_free;
}
err = mlx4_init_mcg_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"multicast group table, aborting.\n");
goto err_qp_table_free;
}
for (port = 1; port <= dev->caps.num_ports; port++) {
ib_port_default_caps = 0;
err = mlx4_get_port_ib_caps(dev, port, &ib_port_default_caps);
if (err)
mlx4_warn(dev, "failed to get port %d default "
"ib capabilities (%d). Continuing with "
"caps = 0\n", port, err);
dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
err = mlx4_SET_PORT(dev, port);
if (err) {
mlx4_err(dev, "Failed to set port %d, aborting\n",
port);
goto err_mcg_table_free;
}
}
return 0;
err_mcg_table_free:
mlx4_cleanup_mcg_table(dev);
err_qp_table_free:
mlx4_cleanup_qp_table(dev);
err_srq_table_free:
mlx4_cleanup_srq_table(dev);
err_cq_table_free:
mlx4_cleanup_cq_table(dev);
err_cmd_poll:
mlx4_cmd_use_polling(dev);
err_eq_table_free:
mlx4_cleanup_eq_table(dev);
err_mr_table_free:
mlx4_cleanup_mr_table(dev);
err_pd_table_free:
mlx4_cleanup_pd_table(dev);
err_kar_unmap:
iounmap(priv->kar);
err_uar_free:
mlx4_uar_free(dev, &priv->driver_uar);
err_uar_table_free:
mlx4_cleanup_uar_table(dev);
return err;
}
static int __devinit mlx4_setup_hca(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
err = mlx4_init_uar_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"user access region table, aborting.\n");
return err;
}
err = mlx4_uar_alloc(dev, &priv->driver_uar);
if (err) {
mlx4_err(dev, "Failed to allocate driver access region, "
"aborting.\n");
goto err_uar_table_free;
}
priv->kar = ioremap(priv->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
if (!priv->kar) {
mlx4_err(dev, "Couldn't map kernel access region, "
"aborting.\n");
err = -ENOMEM;
goto err_uar_free;
}
err = mlx4_init_pd_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"protection domain table, aborting.\n");
goto err_kar_unmap;
}
err = mlx4_init_mr_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"memory region table, aborting.\n");
goto err_pd_table_free;
}
mlx4_map_catas_buf(dev);
err = mlx4_init_eq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"event queue table, aborting.\n");
goto err_catas_buf;
}
err = mlx4_cmd_use_events(dev);
if (err) {
mlx4_err(dev, "Failed to switch to event-driven "
"firmware commands, aborting.\n");
goto err_eq_table_free;
}
err = mlx4_NOP(dev);
if (err) {
mlx4_err(dev, "NOP command failed to generate interrupt "
"(IRQ %d), aborting.\n",
priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
if (dev->flags & MLX4_FLAG_MSI_X)
mlx4_err(dev, "Try again with MSI-X disabled.\n");
else
mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
goto err_cmd_poll;
}
mlx4_dbg(dev, "NOP command IRQ test passed\n");
err = mlx4_init_cq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"completion queue table, aborting.\n");
goto err_cmd_poll;
}
err = mlx4_init_srq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"shared receive queue table, aborting.\n");
goto err_cq_table_free;
}
err = mlx4_init_qp_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"queue pair table, aborting.\n");
goto err_srq_table_free;
}
err = mlx4_init_mcg_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize "
"multicast group table, aborting.\n");
goto err_qp_table_free;
}
return 0;
err_qp_table_free:
mlx4_cleanup_qp_table(dev);
err_srq_table_free:
mlx4_cleanup_srq_table(dev);
err_cq_table_free:
mlx4_cleanup_cq_table(dev);
err_cmd_poll:
mlx4_cmd_use_polling(dev);
err_eq_table_free:
mlx4_cleanup_eq_table(dev);
err_catas_buf:
mlx4_unmap_catas_buf(dev);
mlx4_cleanup_mr_table(dev);
err_pd_table_free:
mlx4_cleanup_pd_table(dev);
err_kar_unmap:
iounmap(priv->kar);
err_uar_free:
mlx4_uar_free(dev, &priv->driver_uar);
err_uar_table_free:
mlx4_cleanup_uar_table(dev);
return err;
}
/* Allocate rx qp's and configure them according to rss map */
int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_rss_map *rss_map = &priv->rss_map;
struct mlx4_qp_context context;
struct mlx4_en_rss_context *rss_context;
void *ptr;
int rss_xor = mdev->profile.rss_xor;
u8 rss_mask = mdev->profile.rss_mask;
int i, srqn, qpn, cqn;
int err = 0;
int good_qps = 0;
mlx4_dbg(DRV, priv, "Configuring rss steering for port %u\n", priv->port);
err = mlx4_qp_reserve_range(mdev->dev, rss_map->size,
rss_map->size, &rss_map->base_qpn);
if (err) {
mlx4_err(mdev, "Failed reserving %d qps for port %u\n",
rss_map->size, priv->port);
return err;
}
for (i = 0; i < rss_map->size; i++) {
cqn = priv->rx_ring[rss_map->map[i]].cqn;
srqn = priv->rx_ring[rss_map->map[i]].srq.srqn;
qpn = rss_map->base_qpn + i;
err = mlx4_en_config_rss_qp(priv, qpn, srqn, cqn,
&rss_map->state[i],
&rss_map->qps[i]);
if (err)
goto rss_err;
++good_qps;
}
/* Configure RSS indirection qp */
err = mlx4_qp_reserve_range(mdev->dev, 1, 1, &priv->base_qpn);
if (err) {
mlx4_err(mdev, "Failed to reserve range for RSS "
"indirection qp\n");
goto rss_err;
}
err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, &rss_map->indir_qp);
if (err) {
mlx4_err(mdev, "Failed to allocate RSS indirection QP\n");
goto reserve_err;
}
rss_map->indir_qp.event = mlx4_en_sqp_event;
mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn,
priv->rx_ring[0].cqn, 0, &context);
ptr = ((void *) &context) + 0x3c;
rss_context = (struct mlx4_en_rss_context *) ptr;
rss_context->base_qpn = cpu_to_be32(ilog2(rss_map->size) << 24 |
(rss_map->base_qpn));
rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn);
rss_context->hash_fn = rss_xor & 0x3;
rss_context->flags = rss_mask << 2;
err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context,
&rss_map->indir_qp, &rss_map->indir_state);
if (err)
goto indir_err;
return 0;
indir_err:
mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
reserve_err:
mlx4_qp_release_range(mdev->dev, priv->base_qpn, 1);
rss_err:
for (i = 0; i < good_qps; i++) {
mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
}
mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, rss_map->size);
return err;
}
int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_cqe *cqe;
struct mlx4_en_rx_ring *ring = &priv->rx_ring[cq->ring];
struct skb_frag_struct *skb_frags;
struct mlx4_en_rx_desc *rx_desc;
struct sk_buff *skb;
int index;
unsigned int length;
int polled = 0;
int ip_summed;
if (!priv->port_up)
return 0;
/* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx
* descriptor offset can be deduced from the CQE index instead of
* reading 'cqe->index' */
index = cq->mcq.cons_index & ring->size_mask;
cqe = &cq->buf[index];
/* Process all completed CQEs */
while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK,
cq->mcq.cons_index & cq->size)) {
skb_frags = ring->rx_info + (index << priv->log_rx_info);
rx_desc = ring->buf + (index << ring->log_stride);
/*
* make sure we read the CQE after we read the ownership bit
*/
rmb();
/* Drop packet on bad receive or bad checksum */
if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
MLX4_CQE_OPCODE_ERROR)) {
mlx4_err(mdev, "CQE completed in error - vendor "
"syndrom:%d syndrom:%d\n",
((struct mlx4_err_cqe *) cqe)->vendor_err_syndrome,
((struct mlx4_err_cqe *) cqe)->syndrome);
goto next;
}
if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) {
mlx4_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n");
goto next;
}
/*
* Packet is OK - process it.
*/
length = be32_to_cpu(cqe->byte_cnt);
ring->bytes += length;
ring->packets++;
if (likely(priv->rx_csum)) {
if ((cqe->status & MLX4_CQE_STATUS_IPOK) &&
(cqe->checksum == 0xffff)) {
priv->port_stats.rx_chksum_good++;
if (mdev->profile.num_lro &&
!mlx4_en_lro_rx(priv, ring, rx_desc,
skb_frags, length, cqe))
goto next;
/* LRO not possible, complete processing here */
ip_summed = CHECKSUM_UNNECESSARY;
INC_PERF_COUNTER(priv->pstats.lro_misses);
} else {
ip_summed = CHECKSUM_NONE;
priv->port_stats.rx_chksum_none++;
}
} else {
ip_summed = CHECKSUM_NONE;
priv->port_stats.rx_chksum_none++;
}
skb = mlx4_en_rx_skb(priv, rx_desc, skb_frags,
ring->page_alloc, length);
if (!skb) {
priv->stats.rx_dropped++;
goto next;
}
skb->ip_summed = ip_summed;
skb->protocol = eth_type_trans(skb, dev);
/* Push it up the stack */
if (priv->vlgrp && (be32_to_cpu(cqe->vlan_my_qpn) &
MLX4_CQE_VLAN_PRESENT_MASK)) {
vlan_hwaccel_receive_skb(skb, priv->vlgrp,
be16_to_cpu(cqe->sl_vid));
} else
netif_receive_skb(skb);
dev->last_rx = jiffies;
next:
++cq->mcq.cons_index;
index = (cq->mcq.cons_index) & ring->size_mask;
cqe = &cq->buf[index];
if (++polled == budget) {
/* We are here because we reached the NAPI budget -
* flush only pending LRO sessions */
if (mdev->profile.num_lro)
mlx4_en_lro_flush(priv, ring, 0);
goto out;
}
}
/* If CQ is empty flush all LRO sessions unconditionally */
if (mdev->profile.num_lro)
mlx4_en_lro_flush(priv, ring, 1);
out:
AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled);
mlx4_cq_set_ci(&cq->mcq);
wmb(); /* ensure HW sees CQ consumer before we post new buffers */
ring->cons = cq->mcq.cons_index;
ring->prod += polled; /* Polled descriptors were realocated in place */
if (unlikely(!ring->full)) {
mlx4_en_copy_desc(priv, ring, ring->cons - polled,
ring->prod - polled, polled);
mlx4_en_fill_rx_buf(dev, ring);
}
mlx4_en_update_rx_prod_db(ring);
return polled;
}
