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Commit aff3d9ef authored by Joao Pinto's avatar Joao Pinto Committed by David S. Miller
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net: stmmac: enable multiple buffers 

This patch creates 2 new structures (stmmac_tx_queue and stmmac_rx_queue)
in include/linux/stmmac.h, enabling that each RX and TX queue has its
own buffers and data.
Signed-off-by: default avatarJoao Pinto <jpinto@synopsys.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent de6b08fd
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Showing with 973 additions and 473 deletions
drivers/net/ethernet/stmicro/stmmac/chain_mode.c
View file @ aff3d9ef
......@@ -26,12 +26,15 @@
static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
{
struct stmmac_priv *priv = (struct stmmac_priv *)p;
unsigned int entry = priv->cur_tx;
struct dma_desc *desc = priv->dma_tx + entry;
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)p;
unsigned int nopaged_len = skb_headlen(skb);
struct stmmac_priv *priv = tx_q->priv_data;
unsigned int entry = tx_q->cur_tx;
unsigned int bmax, des2;
unsigned int i = 1, len;
struct dma_desc *desc;
desc = tx_q->dma_tx + entry;
if (priv->plat->enh_desc)
bmax = BUF_SIZE_8KiB;
......@@ -45,16 +48,16 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = cpu_to_le32(des2);
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = bmax;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = bmax;
/* do not close the descriptor and do not set own bit */
priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum, STMMAC_CHAIN_MODE,
0, false);
while (len != 0) {
priv->tx_skbuff[entry] = NULL;
tx_q->tx_skbuff[entry] = NULL;
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
desc = priv->dma_tx + entry;
desc = tx_q->dma_tx + entry;
if (len > bmax) {
des2 = dma_map_single(priv->device,
......@@ -63,8 +66,8 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = cpu_to_le32(des2);
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = bmax;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = bmax;
priv->hw->desc->prepare_tx_desc(desc, 0, bmax, csum,
STMMAC_CHAIN_MODE, 1,
false);
......@@ -77,8 +80,8 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = cpu_to_le32(des2);
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = len;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = len;
/* last descriptor can be set now */
priv->hw->desc->prepare_tx_desc(desc, 0, len, csum,
STMMAC_CHAIN_MODE, 1,
......@@ -87,7 +90,7 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
}
}
priv->cur_tx = entry;
tx_q->cur_tx = entry;
return entry;
}
......@@ -136,32 +139,34 @@ static void stmmac_init_dma_chain(void *des, dma_addr_t phy_addr,
static void stmmac_refill_desc3(void *priv_ptr, struct dma_desc *p)
{
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
struct stmmac_rx_queue *rx_q = (struct stmmac_rx_queue *)priv_ptr;
struct stmmac_priv *priv = rx_q->priv_data;
if (priv->hwts_rx_en && !priv->extend_desc)
/* NOTE: Device will overwrite des3 with timestamp value if
* 1588-2002 time stamping is enabled, hence reinitialize it
* to keep explicit chaining in the descriptor.
*/
p->des3 = cpu_to_le32((unsigned int)(priv->dma_rx_phy +
(((priv->dirty_rx) + 1) %
p->des3 = cpu_to_le32((unsigned int)(rx_q->dma_rx_phy +
(((rx_q->dirty_rx) + 1) %
DMA_RX_SIZE) *
sizeof(struct dma_desc)));
}
static void stmmac_clean_desc3(void *priv_ptr, struct dma_desc *p)
{
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
unsigned int entry = priv->dirty_tx;
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)priv_ptr;
struct stmmac_priv *priv = tx_q->priv_data;
unsigned int entry = tx_q->dirty_tx;
if (priv->tx_skbuff_dma[entry].last_segment && !priv->extend_desc &&
if (tx_q->tx_skbuff_dma[entry].last_segment && !priv->extend_desc &&
priv->hwts_tx_en)
/* NOTE: Device will overwrite des3 with timestamp value if
* 1588-2002 time stamping is enabled, hence reinitialize it
* to keep explicit chaining in the descriptor.
*/
p->des3 = cpu_to_le32((unsigned int)((priv->dma_tx_phy +
((priv->dirty_tx + 1) % DMA_TX_SIZE))
p->des3 = cpu_to_le32((unsigned int)((tx_q->dma_tx_phy +
((tx_q->dirty_tx + 1) % DMA_TX_SIZE))
* sizeof(struct dma_desc)));
}
......
drivers/net/ethernet/stmicro/stmmac/ring_mode.c
View file @ aff3d9ef
......@@ -26,16 +26,17 @@
static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
{
struct stmmac_priv *priv = (struct stmmac_priv *)p;
unsigned int entry = priv->cur_tx;
struct dma_desc *desc;
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)p;
unsigned int nopaged_len = skb_headlen(skb);
struct stmmac_priv *priv = tx_q->priv_data;
unsigned int entry = tx_q->cur_tx;
unsigned int bmax, len, des2;
struct dma_desc *desc;
if (priv->extend_desc)
desc = (struct dma_desc *)(priv->dma_etx + entry);
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
else
desc = priv->dma_tx + entry;
desc = tx_q->dma_tx + entry;
if (priv->plat->enh_desc)
bmax = BUF_SIZE_8KiB;
......@@ -52,29 +53,29 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = bmax;
priv->tx_skbuff_dma[entry].is_jumbo = true;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = bmax;
tx_q->tx_skbuff_dma[entry].is_jumbo = true;
desc->des3 = cpu_to_le32(des2 + BUF_SIZE_4KiB);
priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum,
STMMAC_RING_MODE, 0, false);
priv->tx_skbuff[entry] = NULL;
tx_q->tx_skbuff[entry] = NULL;
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
if (priv->extend_desc)
desc = (struct dma_desc *)(priv->dma_etx + entry);
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
else
desc = priv->dma_tx + entry;
desc = tx_q->dma_tx + entry;
des2 = dma_map_single(priv->device, skb->data + bmax, len,
DMA_TO_DEVICE);
desc->des2 = cpu_to_le32(des2);
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = len;
priv->tx_skbuff_dma[entry].is_jumbo = true;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = len;
tx_q->tx_skbuff_dma[entry].is_jumbo = true;
desc->des3 = cpu_to_le32(des2 + BUF_SIZE_4KiB);
priv->hw->desc->prepare_tx_desc(desc, 0, len, csum,
......@@ -85,15 +86,15 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
desc->des2 = cpu_to_le32(des2);
if (dma_mapping_error(priv->device, des2))
return -1;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = nopaged_len;
priv->tx_skbuff_dma[entry].is_jumbo = true;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = nopaged_len;
tx_q->tx_skbuff_dma[entry].is_jumbo = true;
desc->des3 = cpu_to_le32(des2 + BUF_SIZE_4KiB);
priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, csum,
STMMAC_RING_MODE, 0, true);
}
priv->cur_tx = entry;
tx_q->cur_tx = entry;
return entry;
}
......@@ -125,12 +126,13 @@ static void stmmac_init_desc3(struct dma_desc *p)
static void stmmac_clean_desc3(void *priv_ptr, struct dma_desc *p)
{
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
unsigned int entry = priv->dirty_tx;
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)priv_ptr;
struct stmmac_priv *priv = tx_q->priv_data;
unsigned int entry = tx_q->dirty_tx;
/* des3 is only used for jumbo frames tx or time stamping */
if (unlikely(priv->tx_skbuff_dma[entry].is_jumbo ||
(priv->tx_skbuff_dma[entry].last_segment &&
if (unlikely(tx_q->tx_skbuff_dma[entry].is_jumbo ||
(tx_q->tx_skbuff_dma[entry].last_segment &&
!priv->extend_desc && priv->hwts_tx_en)))
p->des3 = 0;
}
......
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View file @ aff3d9ef
......@@ -46,6 +46,35 @@ struct stmmac_tx_info {
bool is_jumbo;
};
/* Frequently used values are kept adjacent for cache effect */
struct stmmac_tx_queue {
u32 queue_index;
struct stmmac_priv *priv_data;
struct dma_extended_desc *dma_etx ____cacheline_aligned_in_smp;
struct dma_desc *dma_tx;
struct sk_buff **tx_skbuff;
struct stmmac_tx_info *tx_skbuff_dma;
unsigned int cur_tx;
unsigned int dirty_tx;
dma_addr_t dma_tx_phy;
u32 tx_tail_addr;
};
struct stmmac_rx_queue {
u32 queue_index;
struct stmmac_priv *priv_data;
struct dma_extended_desc *dma_erx;
struct dma_desc *dma_rx ____cacheline_aligned_in_smp;
struct sk_buff **rx_skbuff;
dma_addr_t *rx_skbuff_dma;
struct napi_struct napi ____cacheline_aligned_in_smp;
unsigned int cur_rx;
unsigned int dirty_rx;
u32 rx_zeroc_thresh;
dma_addr_t dma_rx_phy;
u32 rx_tail_addr;
};
struct stmmac_priv {
/* Frequently used values are kept adjacent for cache effect */
struct dma_extended_desc *dma_etx ____cacheline_aligned_in_smp;
......@@ -56,28 +85,22 @@ struct stmmac_priv {
u32 tx_count_frames;
u32 tx_coal_frames;
u32 tx_coal_timer;
struct stmmac_tx_info *tx_skbuff_dma;
dma_addr_t dma_tx_phy;
int tx_coalesce;
int hwts_tx_en;
bool tx_path_in_lpi_mode;
struct timer_list txtimer;
bool tso;
struct dma_desc *dma_rx ____cacheline_aligned_in_smp;
struct dma_extended_desc *dma_erx;
struct sk_buff **rx_skbuff;
unsigned int cur_rx;
unsigned int dirty_rx;
/* TX Queue */
struct stmmac_tx_queue *tx_queue;
/* RX Queue */
struct stmmac_rx_queue *rx_queue;
unsigned int dma_buf_sz;
unsigned int rx_copybreak;
unsigned int rx_zeroc_thresh;
u32 rx_riwt;
int hwts_rx_en;
dma_addr_t *rx_skbuff_dma;
dma_addr_t dma_rx_phy;
struct napi_struct napi ____cacheline_aligned_in_smp;
void __iomem *ioaddr;
struct net_device *dev;
......@@ -119,8 +142,6 @@ struct stmmac_priv {
spinlock_t ptp_lock;
void __iomem *mmcaddr;
void __iomem *ptpaddr;
u32 rx_tail_addr;
u32 tx_tail_addr;
u32 mss;
#ifdef CONFIG_DEBUG_FS
......
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View file @ aff3d9ef
......@@ -185,26 +185,38 @@ static void print_pkt(unsigned char *buf, int len)
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len);
}
static inline u32 stmmac_tx_avail(struct stmmac_priv *priv)
/**
* stmmac_tx_avail - Get tx queue availability
* @priv: driver private structure
* @queue: TX queue index
*/
static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
u32 avail;
if (priv->dirty_tx > priv->cur_tx)
avail = priv->dirty_tx - priv->cur_tx - 1;
if (tx_q->dirty_tx > tx_q->cur_tx)
avail = tx_q->dirty_tx - tx_q->cur_tx - 1;
else
avail = DMA_TX_SIZE - priv->cur_tx + priv->dirty_tx - 1;
avail = DMA_TX_SIZE - tx_q->cur_tx + tx_q->dirty_tx - 1;
return avail;
}
static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv)
/**
* stmmac_rx_dirty - Get RX queue dirty
* @priv: driver private structure
* @queue: RX queue index
*/
static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
u32 dirty;
if (priv->dirty_rx <= priv->cur_rx)
dirty = priv->cur_rx - priv->dirty_rx;
if (rx_q->dirty_rx <= rx_q->cur_rx)
dirty = rx_q->cur_rx - rx_q->dirty_rx;
else
dirty = DMA_RX_SIZE - priv->dirty_rx + priv->cur_rx;
dirty = DMA_RX_SIZE - rx_q->dirty_rx + rx_q->cur_rx;
return dirty;
}
......@@ -232,9 +244,19 @@ static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv)
*/
static void stmmac_enable_eee_mode(struct stmmac_priv *priv)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
u32 queue;
/* check if all TX queues have the work finished */
for (queue = 0; queue < tx_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
if (tx_q->dirty_tx != tx_q->cur_tx)
return; /* still unfinished work */
}
/* Check and enter in LPI mode */
if ((priv->dirty_tx == priv->cur_tx) &&
(priv->tx_path_in_lpi_mode == false))
if (!priv->tx_path_in_lpi_mode)
priv->hw->mac->set_eee_mode(priv->hw,
priv->plat->en_tx_lpi_clockgating);
}
......@@ -891,20 +913,40 @@ static int stmmac_init_phy(struct net_device *dev)
static void stmmac_display_rings(struct stmmac_priv *priv)
{
u32 rx_cnt = priv->plat->rx_queues_to_use;
u32 tx_cnt = priv->plat->tx_queues_to_use;
void *head_rx, *head_tx;
u32 queue;
if (priv->extend_desc) {
head_rx = (void *)priv->dma_erx;
head_tx = (void *)priv->dma_etx;
} else {
head_rx = (void *)priv->dma_rx;
head_tx = (void *)priv->dma_tx;
/* Display RX rings */
for (queue = 0; queue < rx_cnt; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
pr_info("\tRX Queue %d rings\n", queue);
if (priv->extend_desc)
head_rx = (void *)rx_q->dma_erx;
else
head_rx = (void *)rx_q->dma_rx;
/* Display Rx ring */
priv->hw->desc->display_ring(head_rx, DMA_RX_SIZE, true);
}
/* Display Rx ring */
priv->hw->desc->display_ring(head_rx, DMA_RX_SIZE, true);
/* Display Tx ring */
priv->hw->desc->display_ring(head_tx, DMA_TX_SIZE, false);
/* Display TX rings */
for (queue = 0; queue < tx_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
pr_info("\tTX Queue %d rings\n", queue);
if (priv->extend_desc)
head_tx = (void *)tx_q->dma_etx;
else
head_tx = (void *)tx_q->dma_tx;
/* Display Tx ring */
priv->hw->desc->display_ring(head_tx, DMA_TX_SIZE, false);
}
}
static int stmmac_set_bfsize(int mtu, int bufsize)
......@@ -924,48 +966,86 @@ static int stmmac_set_bfsize(int mtu, int bufsize)
}
/**
* stmmac_clear_descriptors - clear descriptors
* stmmac_clear_rx_descriptors - clear the descriptors of a RX queue
* @priv: driver private structure
* Description: this function is called to clear the tx and rx descriptors
* @queue: RX queue index
* Description: this function is called to clear the RX descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_descriptors(struct stmmac_priv *priv)
static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue)
{
int i;
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
u32 i = 0;
/* Clear the Rx/Tx descriptors */
/* Clear the RX descriptors */
for (i = 0; i < DMA_RX_SIZE; i++)
if (priv->extend_desc)
priv->hw->desc->init_rx_desc(&priv->dma_erx[i].basic,
priv->hw->desc->init_rx_desc(&rx_q->dma_erx[i].basic,
priv->use_riwt, priv->mode,
(i == DMA_RX_SIZE - 1));
else
priv->hw->desc->init_rx_desc(&priv->dma_rx[i],
priv->hw->desc->init_rx_desc(&rx_q->dma_rx[i],
priv->use_riwt, priv->mode,
(i == DMA_RX_SIZE - 1));
}
/**
* stmmac_clear_tx_descriptors - clear the descriptors of a TX queue
* @priv: driver private structure
* @queue: TX queue index
* Description: this function is called to clear the TX descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
u32 i = 0;
/* Clear the TX descriptors */
for (i = 0; i < DMA_TX_SIZE; i++)
if (priv->extend_desc)
priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic,
priv->hw->desc->init_tx_desc(&tx_q->dma_etx[i].basic,
priv->mode,
(i == DMA_TX_SIZE - 1));
else
priv->hw->desc->init_tx_desc(&priv->dma_tx[i],
priv->hw->desc->init_tx_desc(&tx_q->dma_tx[i],
priv->mode,
(i == DMA_TX_SIZE - 1));
}
/**
* stmmac_clear_descriptors - clear descriptors
* @priv: driver private structure
* Description: this function is called to clear the tx and rx descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_descriptors(struct stmmac_priv *priv)
{
u32 rx_queue_cnt = priv->plat->rx_queues_to_use;
u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
u32 queue;
for (queue = 0; queue < rx_queue_cnt; queue++)
stmmac_clear_rx_descriptors(priv, queue);
for (queue = 0; queue < tx_queue_cnt; queue++)
stmmac_clear_tx_descriptors(priv, queue);
}
/**
* stmmac_init_rx_buffers - init the RX descriptor buffer.
* @priv: driver private structure
* @p: descriptor pointer
* @i: descriptor index
* @flags: gfp flag.
* @queue: RX queue index
* Description: this function is called to allocate a receive buffer, perform
* the DMA mapping and init the descriptor.
*/
static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
int i, gfp_t flags)
int i, gfp_t flags, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
struct sk_buff *skb;
skb = __netdev_alloc_skb_ip_align(priv->dev, priv->dma_buf_sz, flags);
......@@ -974,20 +1054,20 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
"%s: Rx init fails; skb is NULL\n", __func__);
return -ENOMEM;
}
priv->rx_skbuff[i] = skb;
priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data,
rx_q->rx_skbuff[i] = skb;
rx_q->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data,
priv->dma_buf_sz,
DMA_FROM_DEVICE);
if (dma_mapping_error(priv->device, priv->rx_skbuff_dma[i])) {
if (dma_mapping_error(priv->device, rx_q->rx_skbuff_dma[i])) {
netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
dev_kfree_skb_any(skb);
return -EINVAL;
}
if (priv->synopsys_id >= DWMAC_CORE_4_00)
p->des0 = cpu_to_le32(priv->rx_skbuff_dma[i]);
p->des0 = cpu_to_le32(rx_q->rx_skbuff_dma[i]);
else
p->des2 = cpu_to_le32(priv->rx_skbuff_dma[i]);
p->des2 = cpu_to_le32(rx_q->rx_skbuff_dma[i]);
if ((priv->hw->mode->init_desc3) &&
(priv->dma_buf_sz == BUF_SIZE_16KiB))
......@@ -996,30 +1076,136 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
return 0;
}
static void stmmac_free_rx_buffers(struct stmmac_priv *priv, int i)
/**
* stmmac_free_rx_buffers - free RX buffers.
* @priv: driver private structure
* @queue: RX queue index
* @i: buffer index
*/
static void stmmac_free_rx_buffers(struct stmmac_priv *priv, u32 queue, int i)
{
if (priv->rx_skbuff[i]) {
dma_unmap_single(priv->device, priv->rx_skbuff_dma[i],
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
if (rx_q->rx_skbuff[i]) {
dma_unmap_single(priv->device, rx_q->rx_skbuff_dma[i],
priv->dma_buf_sz, DMA_FROM_DEVICE);
dev_kfree_skb_any(priv->rx_skbuff[i]);
dev_kfree_skb_any(rx_q->rx_skbuff[i]);
}
priv->rx_skbuff[i] = NULL;
rx_q->rx_skbuff[i] = NULL;
}
/**
* init_dma_desc_rings - init the RX/TX descriptor rings
* stmmac_free_tx_buffers - free RX buffers.
* @priv: driver private structure
* @queue: RX queue index
* @i: buffer index
*/
static void stmmac_free_tx_buffers(struct stmmac_priv *priv, u32 queue, u32 i)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
if (tx_q->tx_skbuff_dma[i].buf) {
if (tx_q->tx_skbuff_dma[i].map_as_page)
dma_unmap_page(priv->device,
tx_q->tx_skbuff_dma[i].buf,
tx_q->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
else
dma_unmap_single(priv->device,
tx_q->tx_skbuff_dma[i].buf,
tx_q->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
}
if (tx_q->tx_skbuff[i]) {
dev_kfree_skb_any(tx_q->tx_skbuff[i]);
tx_q->tx_skbuff[i] = NULL;
tx_q->tx_skbuff_dma[i].buf = 0;
tx_q->tx_skbuff_dma[i].map_as_page = false;
}
}
/**
* init_tx_dma_desc_rings - init the TX descriptor rings
* @dev: net device structure
* Description: this function initializes the DMA TX descriptors
* and allocates the socket buffers. It suppors the chained and ring
* modes.
*/
static int init_tx_dma_desc_rings(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
u32 queue;
int i = 0;
for (queue = 0; queue < tx_queue_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
netif_dbg(priv, probe, priv->dev,
"(%s) dma_tx_phy=0x%08x\n", __func__,
(u32)tx_q->dma_tx_phy);
/* Setup the chained descriptor addresses */
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc)
priv->hw->mode->init(tx_q->dma_etx,
tx_q->dma_tx_phy,
DMA_TX_SIZE, 1);
else
priv->hw->mode->init(tx_q->dma_tx,
tx_q->dma_tx_phy,
DMA_TX_SIZE, 0);
}
for (i = 0; i < DMA_TX_SIZE; i++) {
struct dma_desc *p;
if (priv->extend_desc)
p = &((tx_q->dma_etx + i)->basic);
else
p = tx_q->dma_tx + i;
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
} else {
p->des2 = 0;
}
tx_q->tx_skbuff_dma[i].buf = 0;
tx_q->tx_skbuff_dma[i].map_as_page = false;
tx_q->tx_skbuff_dma[i].len = 0;
tx_q->tx_skbuff_dma[i].last_segment = false;
tx_q->tx_skbuff[i] = NULL;
}
tx_q->dirty_tx = 0;
tx_q->cur_tx = 0;
netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue));
}
return 0;
}
/**
* init_rx_dma_desc_rings - init the RX descriptor rings
* @dev: net device structure
* @flags: gfp flag.
* Description: this function initializes the DMA RX/TX descriptors
* and allocates the socket buffers. It supports the chained and ring
* Description: this function initializes the DMA RX descriptors
* and allocates the socket buffers. It suppors the chained and ring
* modes.
*/
static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
static int init_rx_dma_desc_rings(struct net_device *dev, gfp_t flags)
{
int i;
struct stmmac_priv *priv = netdev_priv(dev);
u32 rx_count = priv->plat->rx_queues_to_use;
unsigned int bfsize = 0;
int ret = -ENOMEM;
u32 queue;
int i;
if (priv->hw->mode->set_16kib_bfsize)
bfsize = priv->hw->mode->set_16kib_bfsize(dev->mtu);
......@@ -1029,235 +1215,350 @@ static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
priv->dma_buf_sz = bfsize;
netif_dbg(priv, probe, priv->dev,
"(%s) dma_rx_phy=0x%08x dma_tx_phy=0x%08x\n",
__func__, (u32)priv->dma_rx_phy, (u32)priv->dma_tx_phy);
/* RX INITIALIZATION */
netif_dbg(priv, probe, priv->dev,
"SKB addresses:\nskb\t\tskb data\tdma data\n");
for (i = 0; i < DMA_RX_SIZE; i++) {
struct dma_desc *p;
if (priv->extend_desc)
p = &((priv->dma_erx + i)->basic);
else
p = priv->dma_rx + i;
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
ret = stmmac_init_rx_buffers(priv, p, i, flags);
if (ret)
goto err_init_rx_buffers;
netif_dbg(priv, probe, priv->dev,
"(%s) dma_rx_phy=0x%08x\n", __func__,
(u32)rx_q->dma_rx_phy);
netif_dbg(priv, probe, priv->dev, "[%p]\t[%p]\t[%x]\n",
priv->rx_skbuff[i], priv->rx_skbuff[i]->data,
(unsigned int)priv->rx_skbuff_dma[i]);
}
priv->cur_rx = 0;
priv->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
buf_sz = bfsize;
for (i = 0; i < DMA_RX_SIZE; i++) {
struct dma_desc *p;
/* Setup the chained descriptor addresses */
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc) {
priv->hw->mode->init(priv->dma_erx, priv->dma_rx_phy,
DMA_RX_SIZE, 1);
priv->hw->mode->init(priv->dma_etx, priv->dma_tx_phy,
DMA_TX_SIZE, 1);
} else {
priv->hw->mode->init(priv->dma_rx, priv->dma_rx_phy,
DMA_RX_SIZE, 0);
priv->hw->mode->init(priv->dma_tx, priv->dma_tx_phy,
DMA_TX_SIZE, 0);
if (priv->extend_desc)
p = &((rx_q->dma_erx + i)->basic);
else
p = rx_q->dma_rx + i;
ret = stmmac_init_rx_buffers(priv, p, i, flags, queue);
if (ret)
goto err_init_rx_buffers;
netif_dbg(priv, probe, priv->dev, "[%p]\t[%p]\t[%x]\n",
rx_q->rx_skbuff[i],
rx_q->rx_skbuff[i]->data,
(unsigned int)rx_q->rx_skbuff_dma[i]);
}
}
/* TX INITIALIZATION */
for (i = 0; i < DMA_TX_SIZE; i++) {
struct dma_desc *p;
if (priv->extend_desc)
p = &((priv->dma_etx + i)->basic);
else
p = priv->dma_tx + i;
rx_q->cur_rx = 0;
rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
} else {
p->des2 = 0;
stmmac_clear_rx_descriptors(priv, queue);
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc)
priv->hw->mode->init(rx_q->dma_erx,
rx_q->dma_rx_phy,
DMA_RX_SIZE, 1);
else
priv->hw->mode->init(rx_q->dma_rx,
rx_q->dma_rx_phy,
DMA_RX_SIZE, 0);
}
}
priv->tx_skbuff_dma[i].buf = 0;
priv->tx_skbuff_dma[i].map_as_page = false;
priv->tx_skbuff_dma[i].len = 0;
priv->tx_skbuff_dma[i].last_segment = false;
priv->tx_skbuff[i] = NULL;
buf_sz = bfsize;
return 0;
err_init_rx_buffers:
while (queue-- >= 0) {
while (--i >= 0)
stmmac_free_rx_buffers(priv, queue, i);
i = DMA_RX_SIZE;
}
priv->dirty_tx = 0;
priv->cur_tx = 0;
netdev_reset_queue(priv->dev);
return ret;
}
stmmac_clear_descriptors(priv);
/**
* init_dma_desc_rings - init the RX/TX descriptor rings
* @dev: net device structure
* @flags: gfp flag.
* Description: this function initializes the DMA RX/TX descriptors
* and allocates the socket buffers. It suppors the chained and ring
* modes.
*/
static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
{
struct stmmac_priv *priv = netdev_priv(dev);
int ret = init_rx_dma_desc_rings(dev, flags);
if (ret)
return ret;
ret = init_tx_dma_desc_rings(dev);
if (netif_msg_hw(priv))
stmmac_display_rings(priv);
return 0;
err_init_rx_buffers:
while (--i >= 0)
stmmac_free_rx_buffers(priv, i);
return ret;
}
static void dma_free_rx_skbufs(struct stmmac_priv *priv)
static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue)
{
int i;
for (i = 0; i < DMA_RX_SIZE; i++)
stmmac_free_rx_buffers(priv, i);
stmmac_free_rx_buffers(priv, queue, i);
}
static void dma_free_tx_skbufs(struct stmmac_priv *priv)
static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue)
{
int i;
for (i = 0; i < DMA_TX_SIZE; i++) {
if (priv->tx_skbuff_dma[i].buf) {
if (priv->tx_skbuff_dma[i].map_as_page)
dma_unmap_page(priv->device,
priv->tx_skbuff_dma[i].buf,
priv->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
else
dma_unmap_single(priv->device,
priv->tx_skbuff_dma[i].buf,
priv->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
}
for (i = 0; i < DMA_TX_SIZE; i++)
stmmac_free_tx_buffers(priv, queue, i);
}
/**
* free_rx_dma_desc_resources - free RX DMA resources
* @priv: driver private structure
*/
static void free_rx_dma_desc_resources(struct stmmac_priv *priv)
{
u32 rx_count = priv->plat->rx_queues_to_use;
u32 queue = 0;
if (!priv->rx_queue)
return;
/* Free RX queue resources */
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
if (!rx_q)
break;
/* Release the DMA RX socket buffers */
dma_free_rx_skbufs(priv, queue);
kfree(rx_q->rx_skbuff);
kfree(rx_q->rx_skbuff_dma);
if (!priv->extend_desc)
dma_free_coherent(priv->device,
DMA_RX_SIZE * sizeof(struct dma_desc),
rx_q->dma_rx,
rx_q->dma_rx_phy);
else
dma_free_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_extended_desc),
rx_q->dma_erx,
rx_q->dma_rx_phy);
}
kfree(priv->rx_queue);
}
/**
* free_tx_dma_desc_resources - free TX DMA resources
* @priv: driver private structure
*/
static void free_tx_dma_desc_resources(struct stmmac_priv *priv)
{
u32 tx_count = priv->plat->tx_queues_to_use;
u32 queue = 0;
if (!priv->tx_queue)
return;
/* Free TX queue resources */
for (queue = 0; queue < tx_count; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
if (!tx_q)
break;
/* Release the DMA TX socket buffers */
dma_free_tx_skbufs(priv, queue);
kfree(tx_q->tx_skbuff);
kfree(tx_q->tx_skbuff_dma);
if (!priv->extend_desc)
dma_free_coherent(priv->device,
DMA_TX_SIZE * sizeof(struct dma_desc),
tx_q->dma_tx,
tx_q->dma_tx_phy);
else
dma_free_coherent(priv->device, DMA_TX_SIZE *
sizeof(struct dma_extended_desc),
tx_q->dma_etx,
tx_q->dma_tx_phy);
}
kfree(priv->tx_queue);
}
if (priv->tx_skbuff[i]) {
dev_kfree_skb_any(priv->tx_skbuff[i]);
priv->tx_skbuff[i] = NULL;
priv->tx_skbuff_dma[i].buf = 0;
priv->tx_skbuff_dma[i].map_as_page = false;
/**
* free_dma_desc_resources - free All DMA resources
* @priv: driver private structure
*/
static void free_dma_desc_resources(struct stmmac_priv *priv)
{
free_rx_dma_desc_resources(priv);
free_tx_dma_desc_resources(priv);
}
/**
* alloc_rx_dma_desc_resources - alloc RX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for RX paths. It pre-allocates the
* RX socket buffer in order to allow zero-copy mechanism.
*/
static int alloc_rx_dma_desc_resources(struct stmmac_priv *priv)
{
u32 rx_count = priv->plat->rx_queues_to_use;
int ret = -ENOMEM;
u32 queue = 0;
/* Allocate RX queues array */
priv->rx_queue = kmalloc_array(rx_count,
sizeof(struct stmmac_rx_queue),
GFP_KERNEL);
if (!priv->rx_queue) {
kfree(priv->rx_queue);
return -ENOMEM;
}
/* RX queues buffers and DMA */
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
rx_q->queue_index = queue;
rx_q->priv_data = priv;
rx_q->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE,
sizeof(dma_addr_t),
GFP_KERNEL);
if (!rx_q->rx_skbuff_dma)
goto err_dma_buffers;
rx_q->rx_skbuff = kmalloc_array(DMA_RX_SIZE,
sizeof(struct sk_buff *),
GFP_KERNEL);
if (!rx_q->rx_skbuff)
goto err_dma_buffers;
if (priv->extend_desc) {
rx_q->dma_erx = dma_zalloc_coherent(priv->device,
(DMA_RX_SIZE * sizeof(struct dma_extended_desc)),
&rx_q->dma_rx_phy, GFP_KERNEL);
if (!rx_q->dma_erx)
goto err_dma_buffers;
} else {
rx_q->dma_rx = dma_zalloc_coherent(priv->device,
(DMA_RX_SIZE * sizeof(struct dma_desc)),
&rx_q->dma_rx_phy, GFP_KERNEL);
if (!rx_q->dma_rx)
goto err_dma_buffers;
}
}
return 0;
err_dma_buffers:
free_rx_dma_desc_resources(priv);
return ret;
}
/**
* alloc_dma_desc_resources - alloc TX/RX resources.
* alloc_tx_dma_desc_resources - alloc TX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
* this function allocates the resources for TX paths.
*/
static int alloc_dma_desc_resources(struct stmmac_priv *priv)
static int alloc_tx_dma_desc_resources(struct stmmac_priv *priv)
{
u32 tx_count = priv->plat->tx_queues_to_use;
int ret = -ENOMEM;
u32 queue = 0;
priv->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE, sizeof(dma_addr_t),
GFP_KERNEL);
if (!priv->rx_skbuff_dma)
/* Allocate TX queues array */
priv->tx_queue = kmalloc_array(tx_count,
sizeof(struct stmmac_tx_queue),
GFP_KERNEL);
if (!priv->tx_queue)
return -ENOMEM;
priv->rx_skbuff = kmalloc_array(DMA_RX_SIZE, sizeof(struct sk_buff *),
GFP_KERNEL);
if (!priv->rx_skbuff)
goto err_rx_skbuff;
priv->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE,
sizeof(*priv->tx_skbuff_dma),
GFP_KERNEL);
if (!priv->tx_skbuff_dma)
goto err_tx_skbuff_dma;
priv->tx_skbuff = kmalloc_array(DMA_TX_SIZE, sizeof(struct sk_buff *),
GFP_KERNEL);
if (!priv->tx_skbuff)
goto err_tx_skbuff;
if (priv->extend_desc) {
priv->dma_erx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct
dma_extended_desc),
&priv->dma_rx_phy,
GFP_KERNEL);
if (!priv->dma_erx)
goto err_dma;
/* TX queues buffers and DMA */
for (queue = 0; queue < tx_count; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
tx_q->queue_index = queue;
tx_q->priv_data = priv;
priv->dma_etx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
sizeof(struct
dma_extended_desc),
&priv->dma_tx_phy,
tx_q->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE,
sizeof(struct stmmac_tx_info),
GFP_KERNEL);
if (!tx_q->tx_skbuff_dma)
goto err_dma_buffers;
tx_q->tx_skbuff = kmalloc_array(DMA_TX_SIZE,
sizeof(struct sk_buff *),
GFP_KERNEL);
if (!priv->dma_etx) {
dma_free_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_extended_desc),
priv->dma_erx, priv->dma_rx_phy);
goto err_dma;
}
} else {
priv->dma_rx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_desc),
&priv->dma_rx_phy,
GFP_KERNEL);
if (!priv->dma_rx)
goto err_dma;
priv->dma_tx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
sizeof(struct dma_desc),
&priv->dma_tx_phy,
GFP_KERNEL);
if (!priv->dma_tx) {
dma_free_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_desc),
priv->dma_rx, priv->dma_rx_phy);
goto err_dma;
if (!tx_q->tx_skbuff)
goto err_dma_buffers;
if (priv->extend_desc) {
tx_q->dma_etx =
dma_zalloc_coherent(priv->device,
(DMA_TX_SIZE * sizeof(struct dma_extended_desc)),
&tx_q->dma_tx_phy, GFP_KERNEL);
if (!tx_q->dma_etx)
goto err_dma_buffers;
} else {
tx_q->dma_tx =
dma_zalloc_coherent(priv->device,
(DMA_TX_SIZE * sizeof(struct dma_desc)),
&tx_q->dma_tx_phy, GFP_KERNEL);
if (!tx_q->dma_tx)
goto err_dma_buffers;
}
}
return 0;
err_dma:
kfree(priv->tx_skbuff);
err_tx_skbuff:
kfree(priv->tx_skbuff_dma);
err_tx_skbuff_dma:
kfree(priv->rx_skbuff);
err_rx_skbuff:
kfree(priv->rx_skbuff_dma);
err_dma_buffers:
free_tx_dma_desc_resources(priv);
return ret;
}
static void free_dma_desc_resources(struct stmmac_priv *priv)
/**
* alloc_dma_desc_resources - alloc TX/RX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
static int alloc_dma_desc_resources(struct stmmac_priv *priv)
{
/* Release the DMA TX/RX socket buffers */
dma_free_rx_skbufs(priv);
dma_free_tx_skbufs(priv);
/* Free DMA regions of consistent memory previously allocated */
if (!priv->extend_desc) {
dma_free_coherent(priv->device,
DMA_TX_SIZE * sizeof(struct dma_desc),
priv->dma_tx, priv->dma_tx_phy);
dma_free_coherent(priv->device,
DMA_RX_SIZE * sizeof(struct dma_desc),
priv->dma_rx, priv->dma_rx_phy);
} else {
dma_free_coherent(priv->device, DMA_TX_SIZE *
sizeof(struct dma_extended_desc),
priv->dma_etx, priv->dma_tx_phy);
dma_free_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_extended_desc),
priv->dma_erx, priv->dma_rx_phy);
}
kfree(priv->rx_skbuff_dma);
kfree(priv->rx_skbuff);
kfree(priv->tx_skbuff_dma);
kfree(priv->tx_skbuff);
int ret = 0;
ret = alloc_tx_dma_desc_resources(priv);
if (ret)
return ret;
ret = alloc_rx_dma_desc_resources(priv);
return ret;
}
/**
......@@ -1421,26 +1722,28 @@ static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
/**
* stmmac_tx_clean - to manage the transmission completion
* @priv: driver private structure
* @queue: TX queue index
* Description: it reclaims the transmit resources after transmission completes.
*/
static void stmmac_tx_clean(struct stmmac_priv *priv)
static void stmmac_tx_clean(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
unsigned int bytes_compl = 0, pkts_compl = 0;
unsigned int entry = priv->dirty_tx;
unsigned int entry = tx_q->dirty_tx;
netif_tx_lock(priv->dev);
priv->xstats.tx_clean++;
while (entry != priv->cur_tx) {
struct sk_buff *skb = priv->tx_skbuff[entry];
while (entry != tx_q->cur_tx) {
struct sk_buff *skb = tx_q->tx_skbuff[entry];
struct dma_desc *p;
int status;
if (priv->extend_desc)
p = (struct dma_desc *)(priv->dma_etx + entry);
p = (struct dma_desc *)(tx_q->dma_etx + entry);
else
p = priv->dma_tx + entry;
p = tx_q->dma_tx + entry;
status = priv->hw->desc->tx_status(&priv->dev->stats,
&priv->xstats, p,
......@@ -1461,48 +1764,50 @@ static void stmmac_tx_clean(struct stmmac_priv *priv)
stmmac_get_tx_hwtstamp(priv, p, skb);
}
if (likely(priv->tx_skbuff_dma[entry].buf)) {
if (priv->tx_skbuff_dma[entry].map_as_page)
if (likely(tx_q->tx_skbuff_dma[entry].buf)) {
if (tx_q->tx_skbuff_dma[entry].map_as_page)
dma_unmap_page(priv->device,
priv->tx_skbuff_dma[entry].buf,
priv->tx_skbuff_dma[entry].len,
tx_q->tx_skbuff_dma[entry].buf,
tx_q->tx_skbuff_dma[entry].len,
DMA_TO_DEVICE);
else
dma_unmap_single(priv->device,
priv->tx_skbuff_dma[entry].buf,
priv->tx_skbuff_dma[entry].len,
tx_q->tx_skbuff_dma[entry].buf,
tx_q->tx_skbuff_dma[entry].len,
DMA_TO_DEVICE);
priv->tx_skbuff_dma[entry].buf = 0;
priv->tx_skbuff_dma[entry].len = 0;
priv->tx_skbuff_dma[entry].map_as_page = false;
tx_q->tx_skbuff_dma[entry].buf = 0;
tx_q->tx_skbuff_dma[entry].len = 0;
tx_q->tx_skbuff_dma[entry].map_as_page = false;
}
if (priv->hw->mode->clean_desc3)
priv->hw->mode->clean_desc3(priv, p);
priv->hw->mode->clean_desc3(tx_q, p);
priv->tx_skbuff_dma[entry].last_segment = false;
priv->tx_skbuff_dma[entry].is_jumbo = false;
tx_q->tx_skbuff_dma[entry].last_segment = false;
tx_q->tx_skbuff_dma[entry].is_jumbo = false;
if (likely(skb != NULL)) {
pkts_compl++;
bytes_compl += skb->len;
dev_consume_skb_any(skb);
priv->tx_skbuff[entry] = NULL;
tx_q->tx_skbuff[entry] = NULL;
}
priv->hw->desc->release_tx_desc(p, priv->mode);
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
}
priv->dirty_tx = entry;
tx_q->dirty_tx = entry;
netdev_completed_queue(priv->dev, pkts_compl, bytes_compl);
netdev_tx_completed_queue(netdev_get_tx_queue(priv->dev, queue),
pkts_compl, bytes_compl);
if (unlikely(netif_queue_stopped(priv->dev) &&
stmmac_tx_avail(priv) > STMMAC_TX_THRESH)) {
if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv->dev,
queue))) &&
stmmac_tx_avail(priv, queue) > STMMAC_TX_THRESH) {
netif_dbg(priv, tx_done, priv->dev,
"%s: restart transmit\n", __func__);
netif_wake_queue(priv->dev);
netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
}
if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) {
......@@ -1525,33 +1830,36 @@ static inline void stmmac_disable_dma_irq(struct stmmac_priv *priv, u32 chan)
/**
* stmmac_tx_err - to manage the tx error
* @priv: driver private structure
* @chan: channel index
* @queue: queue index
* Description: it cleans the descriptors and restarts the transmission
* in case of transmission errors.
*/
static void stmmac_tx_err(struct stmmac_priv *priv, u32 chan)
static void stmmac_tx_err(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
u32 chan = queue;
int i;
netif_stop_queue(priv->dev);
netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue));
stmmac_stop_tx_dma(priv, chan);
dma_free_tx_skbufs(priv);
dma_free_tx_skbufs(priv, queue);
for (i = 0; i < DMA_TX_SIZE; i++)
if (priv->extend_desc)
priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic,
priv->hw->desc->init_tx_desc(&tx_q->dma_etx[i].basic,
priv->mode,
(i == DMA_TX_SIZE - 1));
else
priv->hw->desc->init_tx_desc(&priv->dma_tx[i],
priv->hw->desc->init_tx_desc(&tx_q->dma_tx[i],
priv->mode,
(i == DMA_TX_SIZE - 1));
priv->dirty_tx = 0;
priv->cur_tx = 0;
netdev_reset_queue(priv->dev);
tx_q->dirty_tx = 0;
tx_q->cur_tx = 0;
netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue));
stmmac_start_tx_dma(priv, chan);
priv->dev->stats.tx_errors++;
netif_wake_queue(priv->dev);
netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
}
/**
......@@ -1596,12 +1904,14 @@ static void stmmac_dma_interrupt(struct stmmac_priv *priv)
u32 chan;
for (chan = 0; chan < tx_channel_count; chan++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[chan];
status = priv->hw->dma->dma_interrupt(priv->ioaddr,
&priv->xstats, chan);
if (likely((status & handle_rx)) || (status & handle_tx)) {
if (likely(napi_schedule_prep(&priv->napi))) {
if (likely(napi_schedule_prep(&rx_q->napi))) {
stmmac_disable_dma_irq(priv, chan);
__napi_schedule(&priv->napi);
__napi_schedule(&rx_q->napi);
}
}
......@@ -1734,6 +2044,8 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
struct stmmac_rx_queue *rx_q;
struct stmmac_tx_queue *tx_q;
u32 dummy_dma_rx_phy = 0;
u32 dummy_dma_tx_phy = 0;
u32 chan = 0;
......@@ -1761,36 +2073,43 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
/* DMA RX Channel Configuration */
for (chan = 0; chan < rx_channels_count; chan++) {
rx_q = &priv->rx_queue[chan];
priv->hw->dma->init_rx_chan(priv->ioaddr,
priv->plat->dma_cfg,
priv->dma_rx_phy, chan);
rx_q->dma_rx_phy, chan);
priv->rx_tail_addr = priv->dma_rx_phy +
rx_q->rx_tail_addr = rx_q->dma_rx_phy +
(DMA_RX_SIZE * sizeof(struct dma_desc));
priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
priv->rx_tail_addr,
rx_q->rx_tail_addr,
chan);
}
/* DMA TX Channel Configuration */
for (chan = 0; chan < tx_channels_count; chan++) {
tx_q = &priv->tx_queue[chan];
priv->hw->dma->init_chan(priv->ioaddr,
priv->plat->dma_cfg,
chan);
priv->plat->dma_cfg,
chan);
priv->hw->dma->init_tx_chan(priv->ioaddr,
priv->plat->dma_cfg,
priv->dma_tx_phy, chan);
tx_q->dma_tx_phy, chan);
priv->tx_tail_addr = priv->dma_tx_phy +
tx_q->tx_tail_addr = tx_q->dma_tx_phy +
(DMA_TX_SIZE * sizeof(struct dma_desc));
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr,
priv->tx_tail_addr,
tx_q->tx_tail_addr,
chan);
}
} else {
rx_q = &priv->rx_queue[chan];
tx_q = &priv->tx_queue[chan];
priv->hw->dma->init(priv->ioaddr, priv->plat->dma_cfg,
priv->dma_tx_phy, priv->dma_rx_phy, atds);
tx_q->dma_tx_phy, rx_q->dma_rx_phy, atds);
}
if (priv->plat->axi && priv->hw->dma->axi)
......@@ -1808,8 +2127,70 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
static void stmmac_tx_timer(unsigned long data)
{
struct stmmac_priv *priv = (struct stmmac_priv *)data;
u32 tx_queues_count = priv->plat->tx_queues_to_use;
u32 queue;
/* let's scan all the tx queues */
for (queue = 0; queue < tx_queues_count; queue++)
stmmac_tx_clean(priv, queue);
}
/**
* stmmac_stop_all_queues - Stop all queues
* @priv: driver private structure
*/
static void stmmac_stop_all_queues(struct stmmac_priv *priv)
{
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 queue;
for (queue = 0; queue < tx_queues_cnt; queue++)
netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue));
}
/**
* stmmac_start_all_queues - Start all queues
* @priv: driver private structure
*/
static void stmmac_start_all_queues(struct stmmac_priv *priv)
{
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 queue;
stmmac_tx_clean(priv);
for (queue = 0; queue < tx_queues_cnt; queue++)
netif_tx_start_queue(netdev_get_tx_queue(priv->dev, queue));
}
/**
* stmmac_disable_all_queues - Disable all queues
* @priv: driver private structure
*/
static void stmmac_disable_all_queues(struct stmmac_priv *priv)
{
u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
u32 queue;
for (queue = 0; queue < rx_queues_cnt; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
napi_disable(&rx_q->napi);
}
}
/**
* stmmac_enable_all_queues - Enable all queues
* @priv: driver private structure
*/
static void stmmac_enable_all_queues(struct stmmac_priv *priv)
{
u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
u32 queue;
for (queue = 0; queue < rx_queues_cnt; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
napi_enable(&rx_q->napi);
}
}
/**
......@@ -2098,23 +2479,8 @@ static int stmmac_open(struct net_device *dev)
memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
priv->xstats.threshold = tc;
priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
priv->rx_copybreak = STMMAC_RX_COPYBREAK;
ret = alloc_dma_desc_resources(priv);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
__func__);
goto dma_desc_error;
}
ret = init_dma_desc_rings(dev, GFP_KERNEL);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
__func__);
goto init_error;
}
ret = stmmac_hw_setup(dev, true);
if (ret < 0) {
netdev_err(priv->dev, "%s: Hw setup failed\n", __func__);
......@@ -2160,8 +2526,8 @@ static int stmmac_open(struct net_device *dev)
}
}
napi_enable(&priv->napi);
netif_start_queue(dev);
stmmac_enable_all_queues(priv);
stmmac_start_all_queues(priv);
return 0;
......@@ -2178,7 +2544,7 @@ static int stmmac_open(struct net_device *dev)
stmmac_hw_teardown(dev);
init_error:
free_dma_desc_resources(priv);
dma_desc_error:
if (dev->phydev)
phy_disconnect(dev->phydev);
......@@ -2204,9 +2570,9 @@ static int stmmac_release(struct net_device *dev)
phy_disconnect(dev->phydev);
}
netif_stop_queue(dev);
stmmac_stop_all_queues(priv);
napi_disable(&priv->napi);
stmmac_disable_all_queues(priv);
del_timer_sync(&priv->txtimer);
......@@ -2243,22 +2609,24 @@ static int stmmac_release(struct net_device *dev)
* @des: buffer start address
* @total_len: total length to fill in descriptors
* @last_segmant: condition for the last descriptor
* @queue: TX queue index
* Description:
* This function fills descriptor and request new descriptors according to
* buffer length to fill
*/
static void stmmac_tso_allocator(struct stmmac_priv *priv, unsigned int des,
int total_len, bool last_segment)
int total_len, bool last_segment, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
struct dma_desc *desc;
int tmp_len;
u32 buff_size;
int tmp_len;
tmp_len = total_len;
while (tmp_len > 0) {
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
desc = priv->dma_tx + priv->cur_tx;
tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
desc = tx_q->dma_tx + tx_q->cur_tx;
desc->des0 = cpu_to_le32(des + (total_len - tmp_len));
buff_size = tmp_len >= TSO_MAX_BUFF_SIZE ?
......@@ -2302,23 +2670,27 @@ static void stmmac_tso_allocator(struct stmmac_priv *priv, unsigned int des,
*/
static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
{
u32 pay_len, mss;
int tmp_pay_len = 0;
struct dma_desc *desc, *first, *mss_desc = NULL;
struct stmmac_priv *priv = netdev_priv(dev);
u32 queue = skb_get_queue_mapping(skb);
int nfrags = skb_shinfo(skb)->nr_frags;
unsigned int first_entry, des;
struct dma_desc *desc, *first, *mss_desc = NULL;
struct stmmac_tx_queue *tx_q;
int tmp_pay_len = 0;
u32 pay_len, mss;
u8 proto_hdr_len;
int i;
tx_q = &priv->tx_queue[queue];
/* Compute header lengths */
proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
/* Desc availability based on threshold should be enough safe */
if (unlikely(stmmac_tx_avail(priv) <
if (unlikely(stmmac_tx_avail(priv, queue) <
(((skb->len - proto_hdr_len) / TSO_MAX_BUFF_SIZE + 1)))) {
if (!netif_queue_stopped(dev)) {
netif_stop_queue(dev);
if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) {
netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
/* This is a hard error, log it. */
netdev_err(priv->dev,
"%s: Tx Ring full when queue awake\n",
......@@ -2333,10 +2705,10 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
/* set new MSS value if needed */
if (mss != priv->mss) {
mss_desc = priv->dma_tx + priv->cur_tx;
mss_desc = tx_q->dma_tx + tx_q->cur_tx;
priv->hw->desc->set_mss(mss_desc, mss);
priv->mss = mss;
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
}
if (netif_msg_tx_queued(priv)) {
......@@ -2346,9 +2718,9 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
skb->data_len);
}
first_entry = priv->cur_tx;
first_entry = tx_q->cur_tx;
desc = priv->dma_tx + first_entry;
desc = tx_q->dma_tx + first_entry;
first = desc;
/* first descriptor: fill Headers on Buf1 */
......@@ -2357,9 +2729,9 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
if (dma_mapping_error(priv->device, des))
goto dma_map_err;
priv->tx_skbuff_dma[first_entry].buf = des;
priv->tx_skbuff_dma[first_entry].len = skb_headlen(skb);
priv->tx_skbuff[first_entry] = skb;
tx_q->tx_skbuff_dma[first_entry].buf = des;
tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb);
tx_q->tx_skbuff[first_entry] = skb;
first->des0 = cpu_to_le32(des);
......@@ -2370,7 +2742,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
/* If needed take extra descriptors to fill the remaining payload */
tmp_pay_len = pay_len - TSO_MAX_BUFF_SIZE;
stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0));
stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0), queue);
/* Prepare fragments */
for (i = 0; i < nfrags; i++) {
......@@ -2383,22 +2755,22 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
goto dma_map_err;
stmmac_tso_allocator(priv, des, skb_frag_size(frag),
(i == nfrags - 1));
(i == nfrags - 1), queue);
priv->tx_skbuff_dma[priv->cur_tx].buf = des;
priv->tx_skbuff_dma[priv->cur_tx].len = skb_frag_size(frag);
priv->tx_skbuff[priv->cur_tx] = NULL;
priv->tx_skbuff_dma[priv->cur_tx].map_as_page = true;
tx_q->tx_skbuff_dma[tx_q->cur_tx].buf = des;
tx_q->tx_skbuff_dma[tx_q->cur_tx].len = skb_frag_size(frag);
tx_q->tx_skbuff[tx_q->cur_tx] = NULL;
tx_q->tx_skbuff_dma[tx_q->cur_tx].map_as_page = true;
}
priv->tx_skbuff_dma[priv->cur_tx].last_segment = true;
tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true;
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) {
netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n",
__func__);
netif_stop_queue(dev);
netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
}
dev->stats.tx_bytes += skb->len;
......@@ -2430,7 +2802,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
priv->hw->desc->prepare_tso_tx_desc(first, 1,
proto_hdr_len,
pay_len,
1, priv->tx_skbuff_dma[first_entry].last_segment,
1, tx_q->tx_skbuff_dma[first_entry].last_segment,
tcp_hdrlen(skb) / 4, (skb->len - proto_hdr_len));
/* If context desc is used to change MSS */
......@@ -2445,20 +2817,20 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
if (netif_msg_pktdata(priv)) {
pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n",
__func__, priv->cur_tx, priv->dirty_tx, first_entry,
priv->cur_tx, first, nfrags);
__func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry,
tx_q->cur_tx, first, nfrags);
priv->hw->desc->display_ring((void *)priv->dma_tx, DMA_TX_SIZE,
priv->hw->desc->display_ring((void *)tx_q->dma_tx, DMA_TX_SIZE,
0);
pr_info(">>> frame to be transmitted: ");
print_pkt(skb->data, skb_headlen(skb));
}
netdev_sent_queue(dev, skb->len);
netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len);
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, priv->tx_tail_addr,
STMMAC_CHAN0);
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, tx_q->tx_tail_addr,
queue);
return NETDEV_TX_OK;
......@@ -2482,21 +2854,25 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
struct stmmac_priv *priv = netdev_priv(dev);
unsigned int nopaged_len = skb_headlen(skb);
int i, csum_insertion = 0, is_jumbo = 0;
u32 queue = skb_get_queue_mapping(skb);
int nfrags = skb_shinfo(skb)->nr_frags;
unsigned int entry, first_entry;
struct dma_desc *desc, *first;
struct stmmac_tx_queue *tx_q;
unsigned int enh_desc;
unsigned int des;
tx_q = &priv->tx_queue[queue];
/* Manage oversized TCP frames for GMAC4 device */
if (skb_is_gso(skb) && priv->tso) {
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
return stmmac_tso_xmit(skb, dev);
}
if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) {
if (!netif_queue_stopped(dev)) {
netif_stop_queue(dev);
if (unlikely(stmmac_tx_avail(priv, queue) < nfrags + 1)) {
if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) {
netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
/* This is a hard error, log it. */
netdev_err(priv->dev,
"%s: Tx Ring full when queue awake\n",
......@@ -2508,19 +2884,19 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
if (priv->tx_path_in_lpi_mode)
stmmac_disable_eee_mode(priv);
entry = priv->cur_tx;
entry = tx_q->cur_tx;
first_entry = entry;
csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
if (likely(priv->extend_desc))
desc = (struct dma_desc *)(priv->dma_etx + entry);
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
else
desc = priv->dma_tx + entry;
desc = tx_q->dma_tx + entry;
first = desc;
priv->tx_skbuff[first_entry] = skb;
tx_q->tx_skbuff[first_entry] = skb;
enh_desc = priv->plat->enh_desc;
/* To program the descriptors according to the size of the frame */
......@@ -2529,7 +2905,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(is_jumbo) && likely(priv->synopsys_id <
DWMAC_CORE_4_00)) {
entry = priv->hw->mode->jumbo_frm(priv, skb, csum_insertion);
entry = priv->hw->mode->jumbo_frm(tx_q, skb, csum_insertion);
if (unlikely(entry < 0))
goto dma_map_err;
}
......@@ -2542,26 +2918,26 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
if (likely(priv->extend_desc))
desc = (struct dma_desc *)(priv->dma_etx + entry);
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
else
desc = priv->dma_tx + entry;
desc = tx_q->dma_tx + entry;
des = skb_frag_dma_map(priv->device, frag, 0, len,
DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, des))
goto dma_map_err; /* should reuse desc w/o issues */
priv->tx_skbuff[entry] = NULL;
tx_q->tx_skbuff[entry] = NULL;
priv->tx_skbuff_dma[entry].buf = des;
tx_q->tx_skbuff_dma[entry].buf = des;
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
desc->des0 = cpu_to_le32(des);
else
desc->des2 = cpu_to_le32(des);
priv->tx_skbuff_dma[entry].map_as_page = true;
priv->tx_skbuff_dma[entry].len = len;
priv->tx_skbuff_dma[entry].last_segment = last_segment;
tx_q->tx_skbuff_dma[entry].map_as_page = true;
tx_q->tx_skbuff_dma[entry].len = len;
tx_q->tx_skbuff_dma[entry].last_segment = last_segment;
/* Prepare the descriptor and set the own bit too */
priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion,
......@@ -2570,20 +2946,20 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
priv->cur_tx = entry;
tx_q->cur_tx = entry;
if (netif_msg_pktdata(priv)) {
void *tx_head;
netdev_dbg(priv->dev,
"%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d",
__func__, priv->cur_tx, priv->dirty_tx, first_entry,
__func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry,
entry, first, nfrags);
if (priv->extend_desc)
tx_head = (void *)priv->dma_etx;
tx_head = (void *)tx_q->dma_etx;
else
tx_head = (void *)priv->dma_tx;
tx_head = (void *)tx_q->dma_tx;
priv->hw->desc->display_ring(tx_head, DMA_TX_SIZE, false);
......@@ -2591,10 +2967,10 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
print_pkt(skb->data, skb->len);
}
if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) {
netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n",
__func__);
netif_stop_queue(dev);
netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
}
dev->stats.tx_bytes += skb->len;
......@@ -2629,14 +3005,14 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
if (dma_mapping_error(priv->device, des))
goto dma_map_err;
priv->tx_skbuff_dma[first_entry].buf = des;
tx_q->tx_skbuff_dma[first_entry].buf = des;
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
first->des0 = cpu_to_le32(des);
else
first->des2 = cpu_to_le32(des);
priv->tx_skbuff_dma[first_entry].len = nopaged_len;
priv->tx_skbuff_dma[first_entry].last_segment = last_segment;
tx_q->tx_skbuff_dma[first_entry].len = nopaged_len;
tx_q->tx_skbuff_dma[first_entry].last_segment = last_segment;
if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
priv->hwts_tx_en)) {
......@@ -2657,13 +3033,13 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
dma_wmb();
}
netdev_sent_queue(dev, skb->len);
netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len);
if (priv->synopsys_id < DWMAC_CORE_4_00)
priv->hw->dma->enable_dma_transmission(priv->ioaddr);
else
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, priv->tx_tail_addr,
STMMAC_CHAN0);
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, tx_q->tx_tail_addr,
queue);
return NETDEV_TX_OK;
......@@ -2691,9 +3067,9 @@ static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb)
}
static inline int stmmac_rx_threshold_count(struct stmmac_priv *priv)
static inline int stmmac_rx_threshold_count(struct stmmac_rx_queue *rx_q)
{
if (priv->rx_zeroc_thresh < STMMAC_RX_THRESH)
if (rx_q->rx_zeroc_thresh < STMMAC_RX_THRESH)
return 0;
return 1;
......@@ -2702,30 +3078,32 @@ static inline int stmmac_rx_threshold_count(struct stmmac_priv *priv)
/**
* stmmac_rx_refill - refill used skb preallocated buffers
* @priv: driver private structure
* @queue: RX queue index
* Description : this is to reallocate the skb for the reception process
* that is based on zero-copy.
*/
static inline void stmmac_rx_refill(struct stmmac_priv *priv)
static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
int dirty = stmmac_rx_dirty(priv, queue);
unsigned int entry = rx_q->dirty_rx;
int bfsize = priv->dma_buf_sz;
unsigned int entry = priv->dirty_rx;
int dirty = stmmac_rx_dirty(priv);
while (dirty-- > 0) {
struct dma_desc *p;
if (priv->extend_desc)
p = (struct dma_desc *)(priv->dma_erx + entry);
p = (struct dma_desc *)(rx_q->dma_erx + entry);
else
p = priv->dma_rx + entry;
p = rx_q->dma_rx + entry;
if (likely(priv->rx_skbuff[entry] == NULL)) {
if (!rx_q->rx_skbuff[entry]) {
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(priv->dev, bfsize);
if (unlikely(!skb)) {
/* so for a while no zero-copy! */
priv->rx_zeroc_thresh = STMMAC_RX_THRESH;
rx_q->rx_zeroc_thresh = STMMAC_RX_THRESH;
if (unlikely(net_ratelimit()))
dev_err(priv->device,
"fail to alloc skb entry %d\n",
......@@ -2733,28 +3111,28 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
break;
}
priv->rx_skbuff[entry] = skb;
priv->rx_skbuff_dma[entry] =
rx_q->rx_skbuff[entry] = skb;
rx_q->rx_skbuff_dma[entry] =
dma_map_single(priv->device, skb->data, bfsize,
DMA_FROM_DEVICE);
if (dma_mapping_error(priv->device,
priv->rx_skbuff_dma[entry])) {
rx_q->rx_skbuff_dma[entry])) {
netdev_err(priv->dev, "Rx DMA map failed\n");
dev_kfree_skb(skb);
break;
}
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00)) {
p->des0 = cpu_to_le32(priv->rx_skbuff_dma[entry]);
p->des0 = cpu_to_le32(rx_q->rx_skbuff_dma[entry]);
p->des1 = 0;
} else {
p->des2 = cpu_to_le32(priv->rx_skbuff_dma[entry]);
p->des2 = cpu_to_le32(rx_q->rx_skbuff_dma[entry]);
}
if (priv->hw->mode->refill_desc3)
priv->hw->mode->refill_desc3(priv, p);
priv->hw->mode->refill_desc3(rx_q, p);
if (priv->rx_zeroc_thresh > 0)
priv->rx_zeroc_thresh--;
if (rx_q->rx_zeroc_thresh > 0)
rx_q->rx_zeroc_thresh--;
netif_dbg(priv, rx_status, priv->dev,
"refill entry #%d\n", entry);
......@@ -2770,7 +3148,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
}
priv->dirty_rx = entry;
rx_q->dirty_rx = entry;
}
/**
......@@ -2780,21 +3158,22 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
* Description : this the function called by the napi poll method.
* It gets all the frames inside the ring.
*/
static int stmmac_rx(struct stmmac_priv *priv, int limit)
static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
{
unsigned int entry = priv->cur_rx;
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
unsigned int entry = rx_q->cur_rx;
int coe = priv->hw->rx_csum;
unsigned int next_entry;
unsigned int count = 0;
int coe = priv->hw->rx_csum;
if (netif_msg_rx_status(priv)) {
void *rx_head;
netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__);
if (priv->extend_desc)
rx_head = (void *)priv->dma_erx;
rx_head = (void *)rx_q->dma_erx;
else
rx_head = (void *)priv->dma_rx;
rx_head = (void *)rx_q->dma_rx;
priv->hw->desc->display_ring(rx_head, DMA_RX_SIZE, true);
}
......@@ -2804,9 +3183,9 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
struct dma_desc *np;
if (priv->extend_desc)
p = (struct dma_desc *)(priv->dma_erx + entry);
p = (struct dma_desc *)(rx_q->dma_erx + entry);
else
p = priv->dma_rx + entry;
p = rx_q->dma_rx + entry;
/* read the status of the incoming frame */
status = priv->hw->desc->rx_status(&priv->dev->stats,
......@@ -2817,20 +3196,20 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
count++;
priv->cur_rx = STMMAC_GET_ENTRY(priv->cur_rx, DMA_RX_SIZE);
next_entry = priv->cur_rx;
rx_q->cur_rx = STMMAC_GET_ENTRY(rx_q->cur_rx, DMA_RX_SIZE);
next_entry = rx_q->cur_rx;
if (priv->extend_desc)
np = (struct dma_desc *)(priv->dma_erx + next_entry);
np = (struct dma_desc *)(rx_q->dma_erx + next_entry);
else
np = priv->dma_rx + next_entry;
np = rx_q->dma_rx + next_entry;
prefetch(np);
if ((priv->extend_desc) && (priv->hw->desc->rx_extended_status))
priv->hw->desc->rx_extended_status(&priv->dev->stats,
&priv->xstats,
priv->dma_erx +
rx_q->dma_erx +
entry);
if (unlikely(status == discard_frame)) {
priv->dev->stats.rx_errors++;
......@@ -2840,9 +3219,9 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
* them in stmmac_rx_refill() function so that
* device can reuse it.
*/
priv->rx_skbuff[entry] = NULL;
rx_q->rx_skbuff[entry] = NULL;
dma_unmap_single(priv->device,
priv->rx_skbuff_dma[entry],
rx_q->rx_skbuff_dma[entry],
priv->dma_buf_sz,
DMA_FROM_DEVICE);
}
......@@ -2890,7 +3269,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
*/
if (unlikely(!priv->plat->has_gmac4 &&
((frame_len < priv->rx_copybreak) ||
stmmac_rx_threshold_count(priv)))) {
stmmac_rx_threshold_count(rx_q)))) {
skb = netdev_alloc_skb_ip_align(priv->dev,
frame_len);
if (unlikely(!skb)) {
......@@ -2902,21 +3281,21 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
}
dma_sync_single_for_cpu(priv->device,
priv->rx_skbuff_dma
rx_q->rx_skbuff_dma
[entry], frame_len,
DMA_FROM_DEVICE);
skb_copy_to_linear_data(skb,
priv->
rx_q->
rx_skbuff[entry]->data,
frame_len);
skb_put(skb, frame_len);
dma_sync_single_for_device(priv->device,
priv->rx_skbuff_dma
rx_q->rx_skbuff_dma
[entry], frame_len,
DMA_FROM_DEVICE);
} else {
skb = priv->rx_skbuff[entry];
skb = rx_q->rx_skbuff[entry];
if (unlikely(!skb)) {
netdev_err(priv->dev,
"%s: Inconsistent Rx chain\n",
......@@ -2925,12 +3304,12 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
break;
}
prefetch(skb->data - NET_IP_ALIGN);
priv->rx_skbuff[entry] = NULL;
priv->rx_zeroc_thresh++;
rx_q->rx_skbuff[entry] = NULL;
rx_q->rx_zeroc_thresh++;
skb_put(skb, frame_len);
dma_unmap_single(priv->device,
priv->rx_skbuff_dma[entry],
rx_q->rx_skbuff_dma[entry],
priv->dma_buf_sz,
DMA_FROM_DEVICE);
}
......@@ -2952,7 +3331,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
else
skb->ip_summed = CHECKSUM_UNNECESSARY;
napi_gro_receive(&priv->napi, skb);
napi_gro_receive(&rx_q->napi, skb);
priv->dev->stats.rx_packets++;
priv->dev->stats.rx_bytes += frame_len;
......@@ -2960,7 +3339,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
entry = next_entry;
}
stmmac_rx_refill(priv);
stmmac_rx_refill(priv, queue);
priv->xstats.rx_pkt_n += count;
......@@ -2977,14 +3356,22 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
*/
static int stmmac_poll(struct napi_struct *napi, int budget)
{
struct stmmac_priv *priv = container_of(napi, struct stmmac_priv, napi);
int work_done = 0;
u32 chan = STMMAC_CHAN0;
struct stmmac_rx_queue *rx_q =
container_of(napi, struct stmmac_rx_queue, napi);
struct stmmac_priv *priv = rx_q->priv_data;
u32 tx_count = priv->dma_cap.number_tx_queues;
u32 chan = rx_q->queue_index;
u32 work_done = 0;
u32 queue = 0;
priv->xstats.napi_poll++;
stmmac_tx_clean(priv);
/* check all the queues */
for (queue = 0; queue < tx_count; queue++)
stmmac_tx_clean(priv, queue);
/* Process RX packets from this queue */
work_done = stmmac_rx(priv, budget, rx_q->queue_index);
work_done = stmmac_rx(priv, budget);
if (work_done < budget) {
napi_complete_done(napi, work_done);
stmmac_enable_dma_irq(priv, chan);
......@@ -3003,10 +3390,12 @@ static int stmmac_poll(struct napi_struct *napi, int budget)
static void stmmac_tx_timeout(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 chan = STMMAC_CHAN0;
u32 tx_count = priv->plat->tx_queues_to_use;
u32 chan;
/* Clear Tx resources and restart transmitting again */
stmmac_tx_err(priv, chan);
for (chan = 0; chan < tx_count; chan++)
stmmac_tx_err(priv, chan);
}
/**
......@@ -3145,6 +3534,9 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
for (queue = 0; queue < queues_count; queue++) {
struct stmmac_rx_queue *rx_q =
&priv->rx_queue[queue];
status |=
priv->hw->mac->host_mtl_irq_status(priv->hw,
queue);
......@@ -3152,7 +3544,7 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
if (status & CORE_IRQ_MTL_RX_OVERFLOW &&
priv->hw->dma->set_rx_tail_ptr)
priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
priv->rx_tail_addr,
rx_q->rx_tail_addr,
queue);
}
}
......@@ -3252,17 +3644,40 @@ static int stmmac_sysfs_ring_read(struct seq_file *seq, void *v)
{
struct net_device *dev = seq->private;
struct stmmac_priv *priv = netdev_priv(dev);
u32 rx_count = priv->plat->rx_queues_to_use;
u32 tx_count = priv->plat->tx_queues_to_use;
u32 queue;
if (priv->extend_desc) {
seq_printf(seq, "Extended RX descriptor ring:\n");
sysfs_display_ring((void *)priv->dma_erx, DMA_RX_SIZE, 1, seq);
seq_printf(seq, "Extended TX descriptor ring:\n");
sysfs_display_ring((void *)priv->dma_etx, DMA_TX_SIZE, 1, seq);
} else {
seq_printf(seq, "RX descriptor ring:\n");
sysfs_display_ring((void *)priv->dma_rx, DMA_RX_SIZE, 0, seq);
seq_printf(seq, "TX descriptor ring:\n");
sysfs_display_ring((void *)priv->dma_tx, DMA_TX_SIZE, 0, seq);
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
seq_printf(seq, "RX Queue %d:\n", queue);
if (priv->extend_desc) {
seq_printf(seq, "Extended descriptor ring:\n");
sysfs_display_ring((void *)rx_q->dma_erx,
DMA_RX_SIZE, 1, seq);
} else {
seq_printf(seq, "Descriptor ring:\n");
sysfs_display_ring((void *)rx_q->dma_rx,
DMA_RX_SIZE, 0, seq);
}
}
for (queue = 0; queue < tx_count; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
seq_printf(seq, "TX Queue %d:\n", queue);
if (priv->extend_desc) {
seq_printf(seq, "Extended descriptor ring:\n");
sysfs_display_ring((void *)tx_q->dma_etx,
DMA_TX_SIZE, 1, seq);
} else {
seq_printf(seq, "Descriptor ring:\n");
sysfs_display_ring((void *)tx_q->dma_tx,
DMA_TX_SIZE, 0, seq);
}
}
return 0;
......@@ -3545,11 +3960,14 @@ int stmmac_dvr_probe(struct device *device,
struct plat_stmmacenet_data *plat_dat,
struct stmmac_resources *res)
{
int ret = 0;
struct net_device *ndev = NULL;
struct stmmac_priv *priv;
int ret = 0;
u32 queue;
ndev = alloc_etherdev(sizeof(struct stmmac_priv));
ndev = alloc_etherdev_mqs(sizeof(struct stmmac_priv),
MTL_MAX_TX_QUEUES,
MTL_MAX_RX_QUEUES);
if (!ndev)
return -ENOMEM;
......@@ -3591,6 +4009,12 @@ int stmmac_dvr_probe(struct device *device,
if (ret)
goto error_hw_init;
/* Configure real RX and TX queues */
ndev->real_num_rx_queues = priv->plat->rx_queues_to_use;
ndev->real_num_tx_queues = priv->plat->tx_queues_to_use;
priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
ndev->netdev_ops = &stmmac_netdev_ops;
ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
......@@ -3640,7 +4064,26 @@ int stmmac_dvr_probe(struct device *device,
"Enable RX Mitigation via HW Watchdog Timer\n");
}
netif_napi_add(ndev, &priv->napi, stmmac_poll, 64);
ret = alloc_dma_desc_resources(priv);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
__func__);
goto init_dma_error;
}
ret = init_dma_desc_rings(priv->dev, GFP_KERNEL);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
__func__);
goto init_dma_error;
}
for (queue = 0; queue < priv->plat->rx_queues_to_use; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
netif_napi_add(ndev, &rx_q->napi, stmmac_poll,
(64 * priv->plat->rx_queues_to_use));
}
spin_lock_init(&priv->lock);
......@@ -3685,7 +4128,13 @@ int stmmac_dvr_probe(struct device *device,
priv->hw->pcs != STMMAC_PCS_RTBI)
stmmac_mdio_unregister(ndev);
error_mdio_register:
netif_napi_del(&priv->napi);
for (queue = 0; queue < priv->plat->rx_queues_to_use; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
netif_napi_del(&rx_q->napi);
}
init_dma_error:
free_dma_desc_resources(priv);
error_hw_init:
free_netdev(ndev);
......@@ -3747,9 +4196,9 @@ int stmmac_suspend(struct device *dev)
spin_lock_irqsave(&priv->lock, flags);
netif_device_detach(ndev);
netif_stop_queue(ndev);
stmmac_stop_all_queues(priv);
napi_disable(&priv->napi);
stmmac_disable_all_queues(priv);
/* Stop TX/RX DMA */
stmmac_stop_all_dma(priv);
......@@ -3774,6 +4223,31 @@ int stmmac_suspend(struct device *dev)
}
EXPORT_SYMBOL_GPL(stmmac_suspend);
/**
* stmmac_reset_queues_param - reset queue parameters
* @dev: device pointer
*/
static void stmmac_reset_queues_param(struct stmmac_priv *priv)
{
u32 rx_cnt = priv->plat->rx_queues_to_use;
u32 tx_cnt = priv->plat->tx_queues_to_use;
u32 queue;
for (queue = 0; queue < rx_cnt; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
rx_q->cur_rx = 0;
rx_q->dirty_rx = 0;
}
for (queue = 0; queue < tx_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
tx_q->cur_tx = 0;
tx_q->dirty_tx = 0;
}
}
/**
* stmmac_resume - resume callback
* @dev: device pointer
......@@ -3814,10 +4288,8 @@ int stmmac_resume(struct device *dev)
spin_lock_irqsave(&priv->lock, flags);
priv->cur_rx = 0;
priv->dirty_rx = 0;
priv->dirty_tx = 0;
priv->cur_tx = 0;
stmmac_reset_queues_param(priv);
/* reset private mss value to force mss context settings at
* next tso xmit (only used for gmac4).
*/
......@@ -3829,9 +4301,9 @@ int stmmac_resume(struct device *dev)
stmmac_init_tx_coalesce(priv);
stmmac_set_rx_mode(ndev);
napi_enable(&priv->napi);
stmmac_enable_all_queues(priv);
netif_start_queue(ndev);
stmmac_start_all_queues(priv);
spin_unlock_irqrestore(&priv->lock, flags);
......
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