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Merge branch 'hns3-next' 

Guangbin Huang says:

====================
net: hns3: updates for -next

This series includes some optimization in IO path for the HNS3 ethernet
driver.
====================

Cc: Loic Poulain <loic.poulain@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2021-06-16 00:36:07 -07:00
Родитель a078d981f8 99f6b5fb5f
Коммит 66aeec855a
8 изменённых файлов: 682 добавлений и 101 удалений
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8
drivers/net/ethernet/hisilicon/hns3/hnae3.h
Просмотреть файл

@ -159,13 +159,6 @@ enum HNAE3_PF_CAP_BITS {
#define ring_ptr_move_bw(ring, p) \
((ring)->p = ((ring)->p - 1 + (ring)->desc_num) % (ring)->desc_num)
enum hns_desc_type {
DESC_TYPE_UNKNOWN,
DESC_TYPE_SKB,
DESC_TYPE_FRAGLIST_SKB,
DESC_TYPE_PAGE,
};
struct hnae3_handle;
struct hnae3_queue {
@ -767,6 +760,7 @@ struct hnae3_knic_private_info {
u16 rx_buf_len;
u16 num_tx_desc;
u16 num_rx_desc;
u32 tx_spare_buf_size;
struct hnae3_tc_info tc_info;

54
drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
Просмотреть файл

@ -392,6 +392,56 @@ static void hns3_dbg_fill_content(char *content, u16 len,
*pos++ = '\0';
}
static const struct hns3_dbg_item tx_spare_info_items[] = {
{ "QUEUE_ID", 2 },
{ "COPYBREAK", 2 },
{ "LEN", 7 },
{ "NTU", 4 },
{ "NTC", 4 },
{ "LTC", 4 },
{ "DMA", 17 },
};
static void hns3_dbg_tx_spare_info(struct hns3_enet_ring *ring, char *buf,
int len, u32 ring_num, int *pos)
{
char data_str[ARRAY_SIZE(tx_spare_info_items)][HNS3_DBG_DATA_STR_LEN];
struct hns3_tx_spare *tx_spare = ring->tx_spare;
char *result[ARRAY_SIZE(tx_spare_info_items)];
char content[HNS3_DBG_INFO_LEN];
u32 i, j;
if (!tx_spare) {
*pos += scnprintf(buf + *pos, len - *pos,
"tx spare buffer is not enabled\n");
return;
}
for (i = 0; i < ARRAY_SIZE(tx_spare_info_items); i++)
result[i] = &data_str[i][0];
*pos += scnprintf(buf + *pos, len - *pos, "tx spare buffer info\n");
hns3_dbg_fill_content(content, sizeof(content), tx_spare_info_items,
NULL, ARRAY_SIZE(tx_spare_info_items));
*pos += scnprintf(buf + *pos, len - *pos, "%s", content);
for (i = 0; i < ring_num; i++) {
j = 0;
sprintf(result[j++], "%8u", i);
sprintf(result[j++], "%9u", ring->tx_copybreak);
sprintf(result[j++], "%3u", tx_spare->len);
sprintf(result[j++], "%3u", tx_spare->next_to_use);
sprintf(result[j++], "%3u", tx_spare->next_to_clean);
sprintf(result[j++], "%3u", tx_spare->last_to_clean);
sprintf(result[j++], "%pad", &tx_spare->dma);
hns3_dbg_fill_content(content, sizeof(content),
tx_spare_info_items,
(const char **)result,
ARRAY_SIZE(tx_spare_info_items));
*pos += scnprintf(buf + *pos, len - *pos, "%s", content);
}
}
static const struct hns3_dbg_item rx_queue_info_items[] = {
{ "QUEUE_ID", 2 },
{ "BD_NUM", 2 },
@ -400,6 +450,7 @@ static const struct hns3_dbg_item rx_queue_info_items[] = {
{ "HEAD", 2 },
{ "FBDNUM", 2 },
{ "PKTNUM", 2 },
{ "COPYBREAK", 2 },
{ "RING_EN", 2 },
{ "RX_RING_EN", 2 },
{ "BASE_ADDR", 10 },
@ -431,6 +482,7 @@ static void hns3_dump_rx_queue_info(struct hns3_enet_ring *ring,
sprintf(result[j++], "%6u", readl_relaxed(ring->tqp->io_base +
HNS3_RING_RX_RING_PKTNUM_RECORD_REG));
sprintf(result[j++], "%9u", ring->rx_copybreak);
sprintf(result[j++], "%7s", readl_relaxed(ring->tqp->io_base +
HNS3_RING_EN_REG) ? "on" : "off");
@ -593,6 +645,8 @@ static int hns3_dbg_tx_queue_info(struct hnae3_handle *h,
pos += scnprintf(buf + pos, len - pos, "%s", content);
}
hns3_dbg_tx_spare_info(ring, buf, len, h->kinfo.num_tqps, &pos);
return 0;
}

579
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
Просмотреть файл

@ -53,6 +53,19 @@ static int debug = -1;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, " Network interface message level setting");
static unsigned int tx_spare_buf_size;
module_param(tx_spare_buf_size, uint, 0400);
MODULE_PARM_DESC(tx_spare_buf_size, "Size used to allocate tx spare buffer");
static unsigned int tx_sgl = 1;
module_param(tx_sgl, uint, 0600);
MODULE_PARM_DESC(tx_sgl, "Minimum number of frags when using dma_map_sg() to optimize the IOMMU mapping");
#define HNS3_SGL_SIZE(nfrag) (sizeof(struct scatterlist) * (nfrag) + \
sizeof(struct sg_table))
#define HNS3_MAX_SGL_SIZE ALIGN(HNS3_SGL_SIZE(HNS3_MAX_TSO_BD_NUM),\
dma_get_cache_alignment())
#define DEFAULT_MSG_LEVEL (NETIF_MSG_PROBE | NETIF_MSG_LINK | \
NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
@ -941,6 +954,204 @@ void hns3_request_update_promisc_mode(struct hnae3_handle *handle)
ops->request_update_promisc_mode(handle);
}
static u32 hns3_tx_spare_space(struct hns3_enet_ring *ring)
{
struct hns3_tx_spare *tx_spare = ring->tx_spare;
u32 ntc, ntu;
/* This smp_load_acquire() pairs with smp_store_release() in
* hns3_tx_spare_update() called in tx desc cleaning process.
*/
ntc = smp_load_acquire(&tx_spare->last_to_clean);
ntu = tx_spare->next_to_use;
if (ntc > ntu)
return ntc - ntu - 1;
/* The free tx buffer is divided into two part, so pick the
* larger one.
*/
return (ntc > (tx_spare->len - ntu) ? ntc :
(tx_spare->len - ntu)) - 1;
}
static void hns3_tx_spare_update(struct hns3_enet_ring *ring)
{
struct hns3_tx_spare *tx_spare = ring->tx_spare;
if (!tx_spare ||
tx_spare->last_to_clean == tx_spare->next_to_clean)
return;
/* This smp_store_release() pairs with smp_load_acquire() in
* hns3_tx_spare_space() called in xmit process.
*/
smp_store_release(&tx_spare->last_to_clean,
tx_spare->next_to_clean);
}
static bool hns3_can_use_tx_bounce(struct hns3_enet_ring *ring,
struct sk_buff *skb,
u32 space)
{
u32 len = skb->len <= ring->tx_copybreak ? skb->len :
skb_headlen(skb);
if (len > ring->tx_copybreak)
return false;
if (ALIGN(len, dma_get_cache_alignment()) > space) {
u64_stats_update_begin(&ring->syncp);
ring->stats.tx_spare_full++;
u64_stats_update_end(&ring->syncp);
return false;
}
return true;
}
static bool hns3_can_use_tx_sgl(struct hns3_enet_ring *ring,
struct sk_buff *skb,
u32 space)
{
if (skb->len <= ring->tx_copybreak || !tx_sgl ||
(!skb_has_frag_list(skb) &&
skb_shinfo(skb)->nr_frags < tx_sgl))
return false;
if (space < HNS3_MAX_SGL_SIZE) {
u64_stats_update_begin(&ring->syncp);
ring->stats.tx_spare_full++;
u64_stats_update_end(&ring->syncp);
return false;
}
return true;
}
static void hns3_init_tx_spare_buffer(struct hns3_enet_ring *ring)
{
struct hns3_tx_spare *tx_spare;
struct page *page;
u32 alloc_size;
dma_addr_t dma;
int order;
alloc_size = tx_spare_buf_size ? tx_spare_buf_size :
ring->tqp->handle->kinfo.tx_spare_buf_size;
if (!alloc_size)
return;
order = get_order(alloc_size);
tx_spare = devm_kzalloc(ring_to_dev(ring), sizeof(*tx_spare),
GFP_KERNEL);
if (!tx_spare) {
/* The driver still work without the tx spare buffer */
dev_warn(ring_to_dev(ring), "failed to allocate hns3_tx_spare\n");
return;
}
page = alloc_pages_node(dev_to_node(ring_to_dev(ring)),
GFP_KERNEL, order);
if (!page) {
dev_warn(ring_to_dev(ring), "failed to allocate tx spare pages\n");
devm_kfree(ring_to_dev(ring), tx_spare);
return;
}
dma = dma_map_page(ring_to_dev(ring), page, 0,
PAGE_SIZE << order, DMA_TO_DEVICE);
if (dma_mapping_error(ring_to_dev(ring), dma)) {
dev_warn(ring_to_dev(ring), "failed to map pages for tx spare\n");
put_page(page);
devm_kfree(ring_to_dev(ring), tx_spare);
return;
}
tx_spare->dma = dma;
tx_spare->buf = page_address(page);
tx_spare->len = PAGE_SIZE << order;
ring->tx_spare = tx_spare;
}
/* Use hns3_tx_spare_space() to make sure there is enough buffer
* before calling below function to allocate tx buffer.
*/
static void *hns3_tx_spare_alloc(struct hns3_enet_ring *ring,
unsigned int size, dma_addr_t *dma,
u32 *cb_len)
{
struct hns3_tx_spare *tx_spare = ring->tx_spare;
u32 ntu = tx_spare->next_to_use;
size = ALIGN(size, dma_get_cache_alignment());
*cb_len = size;
/* Tx spare buffer wraps back here because the end of
* freed tx buffer is not enough.
*/
if (ntu + size > tx_spare->len) {
*cb_len += (tx_spare->len - ntu);
ntu = 0;
}
tx_spare->next_to_use = ntu + size;
if (tx_spare->next_to_use == tx_spare->len)
tx_spare->next_to_use = 0;
*dma = tx_spare->dma + ntu;
return tx_spare->buf + ntu;
}
static void hns3_tx_spare_rollback(struct hns3_enet_ring *ring, u32 len)
{
struct hns3_tx_spare *tx_spare = ring->tx_spare;
if (len > tx_spare->next_to_use) {
len -= tx_spare->next_to_use;
tx_spare->next_to_use = tx_spare->len - len;
} else {
tx_spare->next_to_use -= len;
}
}
static void hns3_tx_spare_reclaim_cb(struct hns3_enet_ring *ring,
struct hns3_desc_cb *cb)
{
struct hns3_tx_spare *tx_spare = ring->tx_spare;
u32 ntc = tx_spare->next_to_clean;
u32 len = cb->length;
tx_spare->next_to_clean += len;
if (tx_spare->next_to_clean >= tx_spare->len) {
tx_spare->next_to_clean -= tx_spare->len;
if (tx_spare->next_to_clean) {
ntc = 0;
len = tx_spare->next_to_clean;
}
}
/* This tx spare buffer is only really reclaimed after calling
* hns3_tx_spare_update(), so it is still safe to use the info in
* the tx buffer to do the dma sync or sg unmapping after
* tx_spare->next_to_clean is moved forword.
*/
if (cb->type & (DESC_TYPE_BOUNCE_HEAD | DESC_TYPE_BOUNCE_ALL)) {
dma_addr_t dma = tx_spare->dma + ntc;
dma_sync_single_for_cpu(ring_to_dev(ring), dma, len,
DMA_TO_DEVICE);
} else {
struct sg_table *sgt = tx_spare->buf + ntc;
dma_unmap_sg(ring_to_dev(ring), sgt->sgl, sgt->orig_nents,
DMA_TO_DEVICE);
}
}
static int hns3_set_tso(struct sk_buff *skb, u32 *paylen_fdop_ol4cs,
u16 *mss, u32 *type_cs_vlan_tso, u32 *send_bytes)
{
@ -1412,40 +1623,14 @@ out_hw_tx_csum:
return 0;
}
static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
unsigned int size, enum hns_desc_type type)
static int hns3_fill_desc(struct hns3_enet_ring *ring, dma_addr_t dma,
unsigned int size)
{
#define HNS3_LIKELY_BD_NUM 1
struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
struct hns3_desc *desc = &ring->desc[ring->next_to_use];
struct device *dev = ring_to_dev(ring);
skb_frag_t *frag;
unsigned int frag_buf_num;
int k, sizeoflast;
dma_addr_t dma;
if (type == DESC_TYPE_FRAGLIST_SKB ||
type == DESC_TYPE_SKB) {
struct sk_buff *skb = (struct sk_buff *)priv;
dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
} else {
frag = (skb_frag_t *)priv;
dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
}
if (unlikely(dma_mapping_error(dev, dma))) {
u64_stats_update_begin(&ring->syncp);
ring->stats.sw_err_cnt++;
u64_stats_update_end(&ring->syncp);
return -ENOMEM;
}
desc_cb->priv = priv;
desc_cb->length = size;
desc_cb->dma = dma;
desc_cb->type = type;
if (likely(size <= HNS3_MAX_BD_SIZE)) {
desc->addr = cpu_to_le64(dma);
@ -1481,6 +1666,52 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
return frag_buf_num;
}
static int hns3_map_and_fill_desc(struct hns3_enet_ring *ring, void *priv,
unsigned int type)
{
struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
struct device *dev = ring_to_dev(ring);
unsigned int size;
dma_addr_t dma;
if (type & (DESC_TYPE_FRAGLIST_SKB | DESC_TYPE_SKB)) {
struct sk_buff *skb = (struct sk_buff *)priv;
size = skb_headlen(skb);
if (!size)
return 0;
dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
} else if (type & DESC_TYPE_BOUNCE_HEAD) {
/* Head data has been filled in hns3_handle_tx_bounce(),
* just return 0 here.
*/
return 0;
} else {
skb_frag_t *frag = (skb_frag_t *)priv;
size = skb_frag_size(frag);
if (!size)
return 0;
dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
}
if (unlikely(dma_mapping_error(dev, dma))) {
u64_stats_update_begin(&ring->syncp);
ring->stats.sw_err_cnt++;
u64_stats_update_end(&ring->syncp);
return -ENOMEM;
}
desc_cb->priv = priv;
desc_cb->length = size;
desc_cb->dma = dma;
desc_cb->type = type;
return hns3_fill_desc(ring, dma, size);
}
static unsigned int hns3_skb_bd_num(struct sk_buff *skb, unsigned int *bd_size,
unsigned int bd_num)
{
@ -1704,6 +1935,7 @@ static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
for (i = 0; i < ring->desc_num; i++) {
struct hns3_desc *desc = &ring->desc[ring->next_to_use];
struct hns3_desc_cb *desc_cb;
memset(desc, 0, sizeof(*desc));
@ -1714,52 +1946,44 @@ static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
/* rollback one */
ring_ptr_move_bw(ring, next_to_use);
if (!ring->desc_cb[ring->next_to_use].dma)
desc_cb = &ring->desc_cb[ring->next_to_use];
if (!desc_cb->dma)
continue;
/* unmap the descriptor dma address */
if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB ||
ring->desc_cb[ring->next_to_use].type ==
DESC_TYPE_FRAGLIST_SKB)
dma_unmap_single(dev,
ring->desc_cb[ring->next_to_use].dma,
ring->desc_cb[ring->next_to_use].length,
DMA_TO_DEVICE);
else if (ring->desc_cb[ring->next_to_use].length)
dma_unmap_page(dev,
ring->desc_cb[ring->next_to_use].dma,
ring->desc_cb[ring->next_to_use].length,
if (desc_cb->type & (DESC_TYPE_SKB | DESC_TYPE_FRAGLIST_SKB))
dma_unmap_single(dev, desc_cb->dma, desc_cb->length,
DMA_TO_DEVICE);
else if (desc_cb->type &
(DESC_TYPE_BOUNCE_HEAD | DESC_TYPE_BOUNCE_ALL))
hns3_tx_spare_rollback(ring, desc_cb->length);
else if (desc_cb->length)
dma_unmap_page(dev, desc_cb->dma, desc_cb->length,
DMA_TO_DEVICE);
ring->desc_cb[ring->next_to_use].length = 0;
ring->desc_cb[ring->next_to_use].dma = 0;
ring->desc_cb[ring->next_to_use].type = DESC_TYPE_UNKNOWN;
desc_cb->length = 0;
desc_cb->dma = 0;
desc_cb->type = DESC_TYPE_UNKNOWN;
}
}
static int hns3_fill_skb_to_desc(struct hns3_enet_ring *ring,
struct sk_buff *skb, enum hns_desc_type type)
struct sk_buff *skb, unsigned int type)
{
unsigned int size = skb_headlen(skb);
struct sk_buff *frag_skb;
int i, ret, bd_num = 0;
if (size) {
ret = hns3_fill_desc(ring, skb, size, type);
if (unlikely(ret < 0))
return ret;
ret = hns3_map_and_fill_desc(ring, skb, type);
if (unlikely(ret < 0))
return ret;
bd_num += ret;
}
bd_num += ret;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
size = skb_frag_size(frag);
if (!size)
continue;
ret = hns3_fill_desc(ring, frag, size, DESC_TYPE_PAGE);
ret = hns3_map_and_fill_desc(ring, frag, DESC_TYPE_PAGE);
if (unlikely(ret < 0))
return ret;
@ -1811,6 +2035,141 @@ static void hns3_tsyn(struct net_device *netdev, struct sk_buff *skb,
desc->tx.bdtp_fe_sc_vld_ra_ri |= cpu_to_le16(BIT(HNS3_TXD_TSYN_B));
}
static int hns3_handle_tx_bounce(struct hns3_enet_ring *ring,
struct sk_buff *skb)
{
struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
unsigned int type = DESC_TYPE_BOUNCE_HEAD;
unsigned int size = skb_headlen(skb);
dma_addr_t dma;
int bd_num = 0;
u32 cb_len;
void *buf;
int ret;
if (skb->len <= ring->tx_copybreak) {
size = skb->len;
type = DESC_TYPE_BOUNCE_ALL;
}
/* hns3_can_use_tx_bounce() is called to ensure the below
* function can always return the tx buffer.
*/
buf = hns3_tx_spare_alloc(ring, size, &dma, &cb_len);
ret = skb_copy_bits(skb, 0, buf, size);
if (unlikely(ret < 0)) {
hns3_tx_spare_rollback(ring, cb_len);
u64_stats_update_begin(&ring->syncp);
ring->stats.copy_bits_err++;
u64_stats_update_end(&ring->syncp);
return ret;
}
desc_cb->priv = skb;
desc_cb->length = cb_len;
desc_cb->dma = dma;
desc_cb->type = type;
bd_num += hns3_fill_desc(ring, dma, size);
if (type == DESC_TYPE_BOUNCE_HEAD) {
ret = hns3_fill_skb_to_desc(ring, skb,
DESC_TYPE_BOUNCE_HEAD);
if (unlikely(ret < 0))
return ret;
bd_num += ret;
}
dma_sync_single_for_device(ring_to_dev(ring), dma, size,
DMA_TO_DEVICE);
u64_stats_update_begin(&ring->syncp);
ring->stats.tx_bounce++;
u64_stats_update_end(&ring->syncp);
return bd_num;
}
static int hns3_handle_tx_sgl(struct hns3_enet_ring *ring,
struct sk_buff *skb)
{
struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
u32 nfrag = skb_shinfo(skb)->nr_frags + 1;
struct sg_table *sgt;
int i, bd_num = 0;
dma_addr_t dma;
u32 cb_len;
int nents;
if (skb_has_frag_list(skb))
nfrag = HNS3_MAX_TSO_BD_NUM;
/* hns3_can_use_tx_sgl() is called to ensure the below
* function can always return the tx buffer.
*/
sgt = hns3_tx_spare_alloc(ring, HNS3_SGL_SIZE(nfrag),
&dma, &cb_len);
/* scatterlist follows by the sg table */
sgt->sgl = (struct scatterlist *)(sgt + 1);
sg_init_table(sgt->sgl, nfrag);
nents = skb_to_sgvec(skb, sgt->sgl, 0, skb->len);
if (unlikely(nents < 0)) {
hns3_tx_spare_rollback(ring, cb_len);
u64_stats_update_begin(&ring->syncp);
ring->stats.skb2sgl_err++;
u64_stats_update_end(&ring->syncp);
return -ENOMEM;
}
sgt->orig_nents = nents;
sgt->nents = dma_map_sg(ring_to_dev(ring), sgt->sgl, sgt->orig_nents,
DMA_TO_DEVICE);
if (unlikely(!sgt->nents)) {
hns3_tx_spare_rollback(ring, cb_len);
u64_stats_update_begin(&ring->syncp);
ring->stats.map_sg_err++;
u64_stats_update_end(&ring->syncp);
return -ENOMEM;
}
desc_cb->priv = skb;
desc_cb->length = cb_len;
desc_cb->dma = dma;
desc_cb->type = DESC_TYPE_SGL_SKB;
for (i = 0; i < sgt->nents; i++)
bd_num += hns3_fill_desc(ring, sg_dma_address(sgt->sgl + i),
sg_dma_len(sgt->sgl + i));
u64_stats_update_begin(&ring->syncp);
ring->stats.tx_sgl++;
u64_stats_update_end(&ring->syncp);
return bd_num;
}
static int hns3_handle_desc_filling(struct hns3_enet_ring *ring,
struct sk_buff *skb)
{
u32 space;
if (!ring->tx_spare)
goto out;
space = hns3_tx_spare_space(ring);
if (hns3_can_use_tx_sgl(ring, skb, space))
return hns3_handle_tx_sgl(ring, skb);
if (hns3_can_use_tx_bounce(ring, skb, space))
return hns3_handle_tx_bounce(ring, skb);
out:
return hns3_fill_skb_to_desc(ring, skb, DESC_TYPE_SKB);
}
netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct hns3_nic_priv *priv = netdev_priv(netdev);
@ -1857,7 +2216,7 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
* zero, which is unlikely, and 'ret > 0' means how many tx desc
* need to be notified to the hw.
*/
ret = hns3_fill_skb_to_desc(ring, skb, DESC_TYPE_SKB);
ret = hns3_handle_desc_filling(ring, skb);
if (unlikely(ret <= 0))
goto fill_err;
@ -2059,6 +2418,9 @@ static void hns3_nic_get_stats64(struct net_device *netdev,
tx_drop += ring->stats.tx_tso_err;
tx_drop += ring->stats.over_max_recursion;
tx_drop += ring->stats.hw_limitation;
tx_drop += ring->stats.copy_bits_err;
tx_drop += ring->stats.skb2sgl_err;
tx_drop += ring->stats.map_sg_err;
tx_errors += ring->stats.sw_err_cnt;
tx_errors += ring->stats.tx_vlan_err;
tx_errors += ring->stats.tx_l4_proto_err;
@ -2066,6 +2428,9 @@ static void hns3_nic_get_stats64(struct net_device *netdev,
tx_errors += ring->stats.tx_tso_err;
tx_errors += ring->stats.over_max_recursion;
tx_errors += ring->stats.hw_limitation;
tx_errors += ring->stats.copy_bits_err;
tx_errors += ring->stats.skb2sgl_err;
tx_errors += ring->stats.map_sg_err;
} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
/* fetch the rx stats */
@ -2859,7 +3224,8 @@ static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
static void hns3_free_buffer(struct hns3_enet_ring *ring,
struct hns3_desc_cb *cb, int budget)
{
if (cb->type == DESC_TYPE_SKB)
if (cb->type & (DESC_TYPE_SKB | DESC_TYPE_BOUNCE_HEAD |
DESC_TYPE_BOUNCE_ALL | DESC_TYPE_SGL_SKB))
napi_consume_skb(cb->priv, budget);
else if (!HNAE3_IS_TX_RING(ring) && cb->pagecnt_bias)
__page_frag_cache_drain(cb->priv, cb->pagecnt_bias);
@ -2880,12 +3246,15 @@ static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
struct hns3_desc_cb *cb)
{
if (cb->type == DESC_TYPE_SKB || cb->type == DESC_TYPE_FRAGLIST_SKB)
if (cb->type & (DESC_TYPE_SKB | DESC_TYPE_FRAGLIST_SKB))
dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
ring_to_dma_dir(ring));
else if (cb->length)
else if ((cb->type & DESC_TYPE_PAGE) && cb->length)
dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
ring_to_dma_dir(ring));
else if (cb->type & (DESC_TYPE_BOUNCE_ALL | DESC_TYPE_BOUNCE_HEAD |
DESC_TYPE_SGL_SKB))
hns3_tx_spare_reclaim_cb(ring, cb);
}
static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
@ -3037,7 +3406,9 @@ static bool hns3_nic_reclaim_desc(struct hns3_enet_ring *ring,
desc_cb = &ring->desc_cb[ntc];
if (desc_cb->type == DESC_TYPE_SKB) {
if (desc_cb->type & (DESC_TYPE_SKB | DESC_TYPE_BOUNCE_ALL |
DESC_TYPE_BOUNCE_HEAD |
DESC_TYPE_SGL_SKB)) {
(*pkts)++;
(*bytes) += desc_cb->send_bytes;
}
@ -3060,6 +3431,9 @@ static bool hns3_nic_reclaim_desc(struct hns3_enet_ring *ring,
* ring_space called by hns3_nic_net_xmit.
*/
smp_store_release(&ring->next_to_clean, ntc);
hns3_tx_spare_update(ring);
return true;
}
@ -3151,7 +3525,7 @@ static void hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring,
static bool hns3_can_reuse_page(struct hns3_desc_cb *cb)
{
return (page_count(cb->priv) - cb->pagecnt_bias) == 1;
return page_count(cb->priv) == cb->pagecnt_bias;
}
static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
@ -3159,40 +3533,62 @@ static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
struct hns3_desc_cb *desc_cb)
{
struct hns3_desc *desc = &ring->desc[ring->next_to_clean];
u32 frag_offset = desc_cb->page_offset + pull_len;
int size = le16_to_cpu(desc->rx.size);
u32 truesize = hns3_buf_size(ring);
u32 frag_size = size - pull_len;
desc_cb->pagecnt_bias--;
skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
size - pull_len, truesize);
/* Avoid re-using remote or pfmem page */
if (unlikely(!dev_page_is_reusable(desc_cb->priv)))
goto out;
/* Avoid re-using remote and pfmemalloc pages, or the stack is still
* using the page when page_offset rollback to zero, flag default
* unreuse
/* Stack is not using and current page_offset is non-zero, we can
* reuse from the zero offset.
*/
if (!dev_page_is_reusable(desc_cb->priv) ||
(!desc_cb->page_offset && !hns3_can_reuse_page(desc_cb))) {
__page_frag_cache_drain(desc_cb->priv, desc_cb->pagecnt_bias);
return;
}
/* Move offset up to the next cache line */
desc_cb->page_offset += truesize;
if (desc_cb->page_offset + truesize <= hns3_page_size(ring)) {
desc_cb->reuse_flag = 1;
} else if (hns3_can_reuse_page(desc_cb)) {
desc_cb->reuse_flag = 1;
if (desc_cb->page_offset && hns3_can_reuse_page(desc_cb)) {
desc_cb->page_offset = 0;
} else if (desc_cb->pagecnt_bias) {
__page_frag_cache_drain(desc_cb->priv, desc_cb->pagecnt_bias);
desc_cb->reuse_flag = 1;
} else if (desc_cb->page_offset + truesize * 2 <=
hns3_page_size(ring)) {
desc_cb->page_offset += truesize;
desc_cb->reuse_flag = 1;
} else if (frag_size <= ring->rx_copybreak) {
void *frag = napi_alloc_frag(frag_size);
if (unlikely(!frag)) {
u64_stats_update_begin(&ring->syncp);
ring->stats.frag_alloc_err++;
u64_stats_update_end(&ring->syncp);
hns3_rl_err(ring_to_netdev(ring),
"failed to allocate rx frag\n");
goto out;
}
desc_cb->reuse_flag = 1;
memcpy(frag, desc_cb->buf + frag_offset, frag_size);
skb_add_rx_frag(skb, i, virt_to_page(frag),
offset_in_page(frag), frag_size, frag_size);
u64_stats_update_begin(&ring->syncp);
ring->stats.frag_alloc++;
u64_stats_update_end(&ring->syncp);
return;
}
out:
desc_cb->pagecnt_bias--;
if (unlikely(!desc_cb->pagecnt_bias)) {
page_ref_add(desc_cb->priv, USHRT_MAX);
desc_cb->pagecnt_bias = USHRT_MAX;
}
skb_add_rx_frag(skb, i, desc_cb->priv, frag_offset,
frag_size, truesize);
if (unlikely(!desc_cb->reuse_flag))
__page_frag_cache_drain(desc_cb->priv, desc_cb->pagecnt_bias);
}
static int hns3_gro_complete(struct sk_buff *skb, u32 l234info)
@ -4240,10 +4636,13 @@ static void hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
ring = &priv->ring[q->tqp_index];
desc_num = priv->ae_handle->kinfo.num_tx_desc;
ring->queue_index = q->tqp_index;
ring->tx_copybreak = priv->tx_copybreak;
ring->last_to_use = 0;
} else {
ring = &priv->ring[q->tqp_index + queue_num];
desc_num = priv->ae_handle->kinfo.num_rx_desc;
ring->queue_index = q->tqp_index;
ring->rx_copybreak = priv->rx_copybreak;
}
hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
@ -4257,7 +4656,6 @@ static void hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
ring->desc_num = desc_num;
ring->next_to_use = 0;
ring->next_to_clean = 0;
ring->last_to_use = 0;
}
static void hns3_queue_to_ring(struct hnae3_queue *tqp,
@ -4317,6 +4715,8 @@ static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
ret = hns3_alloc_ring_buffers(ring);
if (ret)
goto out_with_desc;
} else {
hns3_init_tx_spare_buffer(ring);
}
return 0;
@ -4339,9 +4739,18 @@ void hns3_fini_ring(struct hns3_enet_ring *ring)
ring->next_to_use = 0;
ring->last_to_use = 0;
ring->pending_buf = 0;
if (ring->skb) {
if (!HNAE3_IS_TX_RING(ring) && ring->skb) {
dev_kfree_skb_any(ring->skb);
ring->skb = NULL;
} else if (HNAE3_IS_TX_RING(ring) && ring->tx_spare) {
struct hns3_tx_spare *tx_spare = ring->tx_spare;
dma_unmap_page(ring_to_dev(ring), tx_spare->dma, tx_spare->len,
DMA_TO_DEVICE);
free_pages((unsigned long)tx_spare->buf,
get_order(tx_spare->len));
devm_kfree(ring_to_dev(ring), tx_spare);
ring->tx_spare = NULL;
}
}

58
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
Просмотреть файл

@ -299,6 +299,16 @@ struct __packed hns3_desc {
};
};
enum hns3_desc_type {
DESC_TYPE_UNKNOWN = 0,
DESC_TYPE_SKB = 1 << 0,
DESC_TYPE_FRAGLIST_SKB = 1 << 1,
DESC_TYPE_PAGE = 1 << 2,
DESC_TYPE_BOUNCE_ALL = 1 << 3,
DESC_TYPE_BOUNCE_HEAD = 1 << 4,
DESC_TYPE_SGL_SKB = 1 << 5,
};
struct hns3_desc_cb {
dma_addr_t dma; /* dma address of this desc */
void *buf; /* cpu addr for a desc */
@ -398,6 +408,12 @@ struct ring_stats {
u64 tx_tso_err;
u64 over_max_recursion;
u64 hw_limitation;
u64 tx_bounce;
u64 tx_spare_full;
u64 copy_bits_err;
u64 tx_sgl;
u64 skb2sgl_err;
u64 map_sg_err;
};
struct {
u64 rx_pkts;
@ -411,11 +427,22 @@ struct ring_stats {
u64 csum_complete;
u64 rx_multicast;
u64 non_reuse_pg;
u64 frag_alloc_err;
u64 frag_alloc;
};
__le16 csum;
};
};
struct hns3_tx_spare {
dma_addr_t dma;
void *buf;
u32 next_to_use;
u32 next_to_clean;
u32 last_to_clean;
u32 len;
};
struct hns3_enet_ring {
struct hns3_desc *desc; /* dma map address space */
struct hns3_desc_cb *desc_cb;
@ -438,18 +465,29 @@ struct hns3_enet_ring {
* next_to_use
*/
int next_to_clean;
union {
int last_to_use; /* last idx used by xmit */
u32 pull_len; /* memcpy len for current rx packet */
};
u32 frag_num;
void *va; /* first buffer address for current packet */
u32 flag; /* ring attribute */
int pending_buf;
struct sk_buff *skb;
struct sk_buff *tail_skb;
union {
/* for Tx ring */
struct {
u32 fd_qb_tx_sample;
int last_to_use; /* last idx used by xmit */
u32 tx_copybreak;
struct hns3_tx_spare *tx_spare;
};
/* for Rx ring */
struct {
u32 pull_len; /* memcpy len for current rx packet */
u32 rx_copybreak;
u32 frag_num;
/* first buffer address for current packet */
unsigned char *va;
struct sk_buff *skb;
struct sk_buff *tail_skb;
};
};
} ____cacheline_internodealigned_in_smp;
enum hns3_flow_level_range {
@ -533,6 +571,8 @@ struct hns3_nic_priv {
struct hns3_enet_coalesce tx_coal;
struct hns3_enet_coalesce rx_coal;
u32 tx_copybreak;
u32 rx_copybreak;
};
union l3_hdr_info {

66
drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
Просмотреть файл

@ -46,6 +46,12 @@ static const struct hns3_stats hns3_txq_stats[] = {
HNS3_TQP_STAT("tso_err", tx_tso_err),
HNS3_TQP_STAT("over_max_recursion", over_max_recursion),
HNS3_TQP_STAT("hw_limitation", hw_limitation),
HNS3_TQP_STAT("bounce", tx_bounce),
HNS3_TQP_STAT("spare_full", tx_spare_full),
HNS3_TQP_STAT("copy_bits_err", copy_bits_err),
HNS3_TQP_STAT("sgl", tx_sgl),
HNS3_TQP_STAT("skb2sgl_err", skb2sgl_err),
HNS3_TQP_STAT("map_sg_err", map_sg_err),
};
#define HNS3_TXQ_STATS_COUNT ARRAY_SIZE(hns3_txq_stats)
@ -65,6 +71,8 @@ static const struct hns3_stats hns3_rxq_stats[] = {
HNS3_TQP_STAT("csum_complete", csum_complete),
HNS3_TQP_STAT("multicast", rx_multicast),
HNS3_TQP_STAT("non_reuse_pg", non_reuse_pg),
HNS3_TQP_STAT("frag_alloc_err", frag_alloc_err),
HNS3_TQP_STAT("frag_alloc", frag_alloc),
};
#define HNS3_PRIV_FLAGS_LEN ARRAY_SIZE(hns3_priv_flags)
@ -1592,6 +1600,60 @@ static int hns3_set_priv_flags(struct net_device *netdev, u32 pflags)
return 0;
}
static int hns3_get_tunable(struct net_device *netdev,
const struct ethtool_tunable *tuna,
void *data)
{
struct hns3_nic_priv *priv = netdev_priv(netdev);
int ret = 0;
switch (tuna->id) {
case ETHTOOL_TX_COPYBREAK:
/* all the tx rings have the same tx_copybreak */
*(u32 *)data = priv->tx_copybreak;
break;
case ETHTOOL_RX_COPYBREAK:
*(u32 *)data = priv->rx_copybreak;
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static int hns3_set_tunable(struct net_device *netdev,
const struct ethtool_tunable *tuna,
const void *data)
{
struct hns3_nic_priv *priv = netdev_priv(netdev);
struct hnae3_handle *h = priv->ae_handle;
int i, ret = 0;
switch (tuna->id) {
case ETHTOOL_TX_COPYBREAK:
priv->tx_copybreak = *(u32 *)data;
for (i = 0; i < h->kinfo.num_tqps; i++)
priv->ring[i].tx_copybreak = priv->tx_copybreak;
break;
case ETHTOOL_RX_COPYBREAK:
priv->rx_copybreak = *(u32 *)data;
for (i = h->kinfo.num_tqps; i < h->kinfo.num_tqps * 2; i++)
priv->ring[i].rx_copybreak = priv->rx_copybreak;
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
#define HNS3_ETHTOOL_COALESCE (ETHTOOL_COALESCE_USECS | \
ETHTOOL_COALESCE_USE_ADAPTIVE | \
ETHTOOL_COALESCE_RX_USECS_HIGH | \
@ -1635,6 +1697,8 @@ static const struct ethtool_ops hns3vf_ethtool_ops = {
.set_msglevel = hns3_set_msglevel,
.get_priv_flags = hns3_get_priv_flags,
.set_priv_flags = hns3_set_priv_flags,
.get_tunable = hns3_get_tunable,
.set_tunable = hns3_set_tunable,
};
static const struct ethtool_ops hns3_ethtool_ops = {
@ -1674,6 +1738,8 @@ static const struct ethtool_ops hns3_ethtool_ops = {
.get_priv_flags = hns3_get_priv_flags,
.set_priv_flags = hns3_set_priv_flags,
.get_ts_info = hns3_get_ts_info,
.get_tunable = hns3_get_tunable,
.set_tunable = hns3_set_tunable,
};
void hns3_ethtool_set_ops(struct net_device *netdev)

2
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
Просмотреть файл

@ -542,6 +542,8 @@ struct hclge_pf_res_cmd {
#define HCLGE_CFG_UMV_TBL_SPACE_M GENMASK(31, 16)
#define HCLGE_CFG_PF_RSS_SIZE_S 0
#define HCLGE_CFG_PF_RSS_SIZE_M GENMASK(3, 0)
#define HCLGE_CFG_TX_SPARE_BUF_SIZE_S 4
#define HCLGE_CFG_TX_SPARE_BUF_SIZE_M GENMASK(15, 4)
#define HCLGE_CFG_CMD_CNT 4

14
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
Просмотреть файл

@ -1279,6 +1279,7 @@ static u32 hclge_get_max_speed(u16 speed_ability)
static void hclge_parse_cfg(struct hclge_cfg *cfg, struct hclge_desc *desc)
{
#define HCLGE_TX_SPARE_SIZE_UNIT 4096
#define SPEED_ABILITY_EXT_SHIFT 8
struct hclge_cfg_param_cmd *req;
@ -1358,6 +1359,15 @@ static void hclge_parse_cfg(struct hclge_cfg *cfg, struct hclge_desc *desc)
cfg->pf_rss_size_max = cfg->pf_rss_size_max ?
1U << cfg->pf_rss_size_max :
cfg->vf_rss_size_max;
/* The unit of the tx spare buffer size queried from configuration
* file is HCLGE_TX_SPARE_SIZE_UNIT(4096) bytes, so a conversion is
* needed here.
*/
cfg->tx_spare_buf_size = hnae3_get_field(__le32_to_cpu(req->param[2]),
HCLGE_CFG_TX_SPARE_BUF_SIZE_M,
HCLGE_CFG_TX_SPARE_BUF_SIZE_S);
cfg->tx_spare_buf_size *= HCLGE_TX_SPARE_SIZE_UNIT;
}
/* hclge_get_cfg: query the static parameter from flash
@ -1539,6 +1549,7 @@ static int hclge_configure(struct hclge_dev *hdev)
hdev->tc_max = cfg.tc_num;
hdev->tm_info.hw_pfc_map = 0;
hdev->wanted_umv_size = cfg.umv_space;
hdev->tx_spare_buf_size = cfg.tx_spare_buf_size;
if (cfg.vlan_fliter_cap == HCLGE_VLAN_FLTR_CAN_MDF)
set_bit(HNAE3_DEV_SUPPORT_VLAN_FLTR_MDF_B, ae_dev->caps);
@ -1736,6 +1747,7 @@ static int hclge_knic_setup(struct hclge_vport *vport, u16 num_tqps,
kinfo->num_rx_desc = num_rx_desc;
kinfo->rx_buf_len = hdev->rx_buf_len;
kinfo->tx_spare_buf_size = hdev->tx_spare_buf_size;
kinfo->tqp = devm_kcalloc(&hdev->pdev->dev, num_tqps,
sizeof(struct hnae3_queue *), GFP_KERNEL);
@ -11059,6 +11071,8 @@ static void hclge_info_show(struct hclge_dev *hdev)
hdev->flag & HCLGE_FLAG_DCB_ENABLE ? "enable" : "disable");
dev_info(dev, "MQPRIO %s\n",
hdev->flag & HCLGE_FLAG_MQPRIO_ENABLE ? "enable" : "disable");
dev_info(dev, "Default tx spare buffer size: %u\n",
hdev->tx_spare_buf_size);
dev_info(dev, "PF info end.\n");
}

2
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
Просмотреть файл

@ -384,6 +384,7 @@ struct hclge_cfg {
u8 mac_addr[ETH_ALEN];
u8 default_speed;
u32 numa_node_map;
u32 tx_spare_buf_size;
u16 speed_ability;
u16 umv_space;
};
@ -848,6 +849,7 @@ struct hclge_dev {
u16 alloc_rss_size; /* Allocated RSS task queue */
u16 vf_rss_size_max; /* HW defined VF max RSS task queue */
u16 pf_rss_size_max; /* HW defined PF max RSS task queue */
u32 tx_spare_buf_size; /* HW defined TX spare buffer size */
u16 fdir_pf_filter_count; /* Num of guaranteed filters for this PF */
u16 num_alloc_vport; /* Num vports this driver supports */