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Revert "net: stmmac: enable multiple buffers"

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The commit aff3d9eff8 ("net: stmmac: enable multiple buffers") breaks
numerous boards. while some patch exists for fixing some of it,
dwmac-sunxi is still broken with it.
Since this patch is very huge, it will be better to split it in smaller
part.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
LABBE Corentin 2017-03-29 07:05:40 +02:00 committed by David S. Miller
parent 397df7092a
commit 5bacd77849
4 changed files with 492 additions and 992 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/net/ethernet/stmicro/stmmac/chain_mode.c
View File

@ -26,15 +26,12 @@
static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
{
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)p;
struct stmmac_priv *priv = (struct stmmac_priv *)p;
unsigned int entry = priv->cur_tx;
struct dma_desc *desc = priv->dma_tx + entry;
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;
@ -48,16 +45,16 @@ 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;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = bmax;
priv->tx_skbuff_dma[entry].buf = des2;
priv->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) {
tx_q->tx_skbuff[entry] = NULL;
priv->tx_skbuff[entry] = NULL;
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
desc = tx_q->dma_tx + entry;
desc = priv->dma_tx + entry;
if (len > bmax) {
des2 = dma_map_single(priv->device,
@ -66,8 +63,8 @@ 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;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = bmax;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = bmax;
priv->hw->desc->prepare_tx_desc(desc, 0, bmax, csum,
STMMAC_CHAIN_MODE, 1,
false);
@ -80,8 +77,8 @@ 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;
tx_q->tx_skbuff_dma[entry].buf = des2;
tx_q->tx_skbuff_dma[entry].len = len;
priv->tx_skbuff_dma[entry].buf = des2;
priv->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,
@ -90,7 +87,7 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
}
}
tx_q->cur_tx = entry;
priv->cur_tx = entry;
return entry;
}
@ -139,34 +136,32 @@ 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_rx_queue *rx_q = (struct stmmac_rx_queue *)priv_ptr;
struct stmmac_priv *priv = rx_q->priv_data;
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
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)(rx_q->dma_rx_phy +
(((rx_q->dirty_rx) + 1) %
p->des3 = cpu_to_le32((unsigned int)(priv->dma_rx_phy +
(((priv->dirty_rx) + 1) %
DMA_RX_SIZE) *
sizeof(struct dma_desc)));
}
static void stmmac_clean_desc3(void *priv_ptr, struct dma_desc *p)
{
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;
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
unsigned int entry = priv->dirty_tx;
if (tx_q->tx_skbuff_dma[entry].last_segment && !priv->extend_desc &&
if (priv->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)((tx_q->dma_tx_phy +
((tx_q->dirty_tx + 1) % DMA_TX_SIZE))
p->des3 = cpu_to_le32((unsigned int)((priv->dma_tx_phy +
((priv->dirty_tx + 1) % DMA_TX_SIZE))
* sizeof(struct dma_desc)));
}

48
drivers/net/ethernet/stmicro/stmmac/ring_mode.c
View File

@ -26,17 +26,16 @@
static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
{
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 stmmac_priv *priv = (struct stmmac_priv *)p;
unsigned int entry = priv->cur_tx;
struct dma_desc *desc;
unsigned int nopaged_len = skb_headlen(skb);
unsigned int bmax, len, des2;
if (priv->extend_desc)
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
desc = (struct dma_desc *)(priv->dma_etx + entry);
else
desc = tx_q->dma_tx + entry;
desc = priv->dma_tx + entry;
if (priv->plat->enh_desc)
bmax = BUF_SIZE_8KiB;
@ -53,29 +52,29 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
if (dma_mapping_error(priv->device, des2))
return -1;
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;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = bmax;
priv->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);
tx_q->tx_skbuff[entry] = NULL;
priv->tx_skbuff[entry] = NULL;
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
if (priv->extend_desc)
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
desc = (struct dma_desc *)(priv->dma_etx + entry);
else
desc = tx_q->dma_tx + entry;
desc = priv->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;
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;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = len;
priv->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,
@ -86,15 +85,15 @@ 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;
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;
priv->tx_skbuff_dma[entry].buf = des2;
priv->tx_skbuff_dma[entry].len = nopaged_len;
priv->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);
}
tx_q->cur_tx = entry;
priv->cur_tx = entry;
return entry;
}
@ -126,13 +125,12 @@ static void stmmac_init_desc3(struct dma_desc *p)
static void stmmac_clean_desc3(void *priv_ptr, struct dma_desc *p)
{
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;
struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
unsigned int entry = priv->dirty_tx;
/* des3 is only used for jumbo frames tx or time stamping */
if (unlikely(tx_q->tx_skbuff_dma[entry].is_jumbo ||
(tx_q->tx_skbuff_dma[entry].last_segment &&
if (unlikely(priv->tx_skbuff_dma[entry].is_jumbo ||
(priv->tx_skbuff_dma[entry].last_segment &&
!priv->extend_desc && priv->hwts_tx_en)))
p->des3 = 0;
}

49
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View File

@ -46,35 +46,6 @@ 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;
@ -85,22 +56,28 @@ 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;
/* TX Queue */
struct stmmac_tx_queue *tx_queue;
/* RX Queue */
struct stmmac_rx_queue *rx_queue;
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;
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;
@ -142,6 +119,8 @@ 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

1342
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

File diff suppressed because it is too large Load Diff