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Date: Thu, 6 Apr 2017 11:07:59 +0200
From: Niklas Cassel <niklas.cassel@...s.com>
To: Joao Pinto <Joao.Pinto@...opsys.com>, <davem@...emloft.net>,
<clabbe.montjoie@...il.com>, <treding@...dia.com>,
<julia.lawall@...6.fr>
CC: <netdev@...r.kernel.org>
Subject: Re: [PATCH 2/4 v3 net-next] net: stmmac: adding multiple buffers for
rx
Survived 10/10 reboot + ping test
Tested-by: Niklas Cassel <niklas.cassel@...s.com>
On 04/06/2017 10:49 AM, Joao Pinto wrote:
> This patch adds the structure stmmac_rx_queue which contains
> rx queues specific data (previously in stmmac_priv).
>
> Signed-off-by: Joao Pinto <jpinto@...opsys.com>
> ---
> changes v2->v3:
> - fixed infinite loop in err_init_rx_buffers error handling
> changes v1->v2:
> - %d replaced by %u when printing unsigned
> - err_init_rx_buffers treatment fixed
>
> drivers/net/ethernet/stmicro/stmmac/chain_mode.c | 7 +-
> drivers/net/ethernet/stmicro/stmmac/stmmac.h | 26 +-
> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 457 ++++++++++++++--------
> 3 files changed, 306 insertions(+), 184 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/chain_mode.c b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c
> index 01a8c02..8db5a80 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/chain_mode.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c
> @@ -136,15 +136,16 @@ 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)));
> }
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> index cd8fb61..c7ad9e4 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> @@ -46,6 +46,20 @@ struct stmmac_tx_info {
> bool is_jumbo;
> };
>
> +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;
> + 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;
> @@ -64,18 +78,10 @@ struct stmmac_priv {
> 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;
> 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;
>
> @@ -85,6 +91,9 @@ struct stmmac_priv {
> struct mac_device_info *hw;
> spinlock_t lock;
>
> + /* RX Queue */
> + struct stmmac_rx_queue rx_queue[MTL_MAX_RX_QUEUES];
> +
> int oldlink;
> int speed;
> int oldduplex;
> @@ -119,7 +128,6 @@ struct stmmac_priv {
> spinlock_t ptp_lock;
> void __iomem *mmcaddr;
> void __iomem *ptpaddr;
> - u32 rx_tail_addr;
> u32 tx_tail_addr;
> u32 mss;
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index ff839e1..77caba4 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -197,14 +197,20 @@ static inline u32 stmmac_tx_avail(struct stmmac_priv *priv)
> 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;
> }
> @@ -891,15 +897,24 @@ static int stmmac_init_phy(struct net_device *dev)
>
> static void stmmac_display_rx_rings(struct stmmac_priv *priv)
> {
> + u32 rx_cnt = priv->plat->rx_queues_to_use;
> void *head_rx;
> + u32 queue;
>
> - if (priv->extend_desc)
> - head_rx = (void *)priv->dma_erx;
> - else
> - head_rx = (void *)priv->dma_rx;
> + /* Display RX rings */
> + for (queue = 0; queue < rx_cnt; queue++) {
> + struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
>
> - /* Display RX ring */
> - priv->hw->desc->display_ring(head_rx, DMA_RX_SIZE, true);
> + pr_info("\tRX Queue %u 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);
> + }
> }
>
> static void stmmac_display_tx_rings(struct stmmac_priv *priv)
> @@ -943,21 +958,23 @@ static int stmmac_set_bfsize(int mtu, int bufsize)
> /**
> * stmmac_clear_rx_descriptors - clear RX descriptors
> * @priv: driver private structure
> + * @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_rx_descriptors(struct stmmac_priv *priv)
> +static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue)
> {
> + struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
> int i;
>
> /* 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));
> }
> @@ -992,8 +1009,12 @@ static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv)
> */
> static void stmmac_clear_descriptors(struct stmmac_priv *priv)
> {
> + u32 rx_queue_cnt = priv->plat->rx_queues_to_use;
> + u32 queue;
> +
> /* Clear the RX descriptors */
> - stmmac_clear_rx_descriptors(priv);
> + for (queue = 0; queue < rx_queue_cnt; queue++)
> + stmmac_clear_rx_descriptors(priv, queue);
>
> /* Clear the TX descriptors */
> stmmac_clear_tx_descriptors(priv);
> @@ -1004,13 +1025,15 @@ static void stmmac_clear_descriptors(struct stmmac_priv *priv)
> * @priv: driver private structure
> * @p: descriptor pointer
> * @i: descriptor index
> - * @flags: gfp flag.
> + * @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);
> @@ -1019,20 +1042,20 @@ 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))
> @@ -1044,16 +1067,19 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
> /**
> * stmmac_free_rx_buffer - free RX dma buffers
> * @priv: private structure
> + * @queue: RX queue index
> * @i: buffer index.
> */
> -static void stmmac_free_rx_buffer(struct stmmac_priv *priv, int i)
> +static void stmmac_free_rx_buffer(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;
> }
>
> /**
> @@ -1094,10 +1120,12 @@ static void stmmac_free_tx_buffer(struct stmmac_priv *priv, int i)
> */
> static int init_dma_rx_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);
> @@ -1107,45 +1135,69 @@ static int init_dma_rx_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\n", __func__, (u32)priv->dma_rx_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);
> - else
> - priv->hw->mode->init(priv->dma_rx, priv->dma_rx_phy,
> - DMA_RX_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]);
> + }
> +
> + rx_q->cur_rx = 0;
> + rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
> +
> + stmmac_clear_rx_descriptors(priv, queue);
> +
> + /* Setup the chained descriptor addresses */
> + 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);
> + }
> }
>
> + buf_sz = bfsize;
> +
> return 0;
> +
> err_init_rx_buffers:
> - while (--i >= 0)
> - stmmac_free_rx_buffer(priv, i);
> + while (queue >= 0) {
> + while (--i >= 0)
> + stmmac_free_rx_buffer(priv, queue, i);
> +
> + if (queue == 0)
> + break;
> +
> + i = DMA_RX_SIZE;
> + queue--;
> + }
> +
> return ret;
> }
>
> @@ -1234,13 +1286,14 @@ static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
> /**
> * dma_free_rx_skbufs - free RX dma buffers
> * @priv: private structure
> + * @queue: RX queue index
> */
> -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_buffer(priv, i);
> + stmmac_free_rx_buffer(priv, queue, i);
> }
>
> /**
> @@ -1256,6 +1309,37 @@ static void dma_free_tx_skbufs(struct stmmac_priv *priv)
> }
>
> /**
> + * free_dma_rx_desc_resources - free RX dma desc resources
> + * @priv: private structure
> + */
> +static void free_dma_rx_desc_resources(struct stmmac_priv *priv)
> +{
> + u32 rx_count = priv->plat->rx_queues_to_use;
> + u32 queue;
> +
> + /* Free RX queue resources */
> + for (queue = 0; queue < rx_count; queue++) {
> + struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
> +
> + /* Release the DMA RX socket buffers */
> + dma_free_rx_skbufs(priv, queue);
> +
> + /* Free DMA regions of consistent memory previously allocated */
> + 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(rx_q->rx_skbuff_dma);
> + kfree(rx_q->rx_skbuff);
> + }
> +}
> +
> +/**
> * alloc_dma_rx_desc_resources - alloc RX resources.
> * @priv: private structure
> * Description: according to which descriptor can be used (extend or basic)
> @@ -1265,42 +1349,56 @@ static void dma_free_tx_skbufs(struct stmmac_priv *priv)
> */
> static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv)
> {
> + u32 rx_count = priv->plat->rx_queues_to_use;
> int ret = -ENOMEM;
> + u32 queue;
>
> - priv->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE, sizeof(dma_addr_t),
> - GFP_KERNEL);
> - if (!priv->rx_skbuff_dma)
> - return -ENOMEM;
> + /* RX queues buffers and DMA */
> + for (queue = 0; queue < rx_count; queue++) {
> + struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
>
> - priv->rx_skbuff = kmalloc_array(DMA_RX_SIZE, sizeof(struct sk_buff *),
> - GFP_KERNEL);
> - if (!priv->rx_skbuff)
> - goto err_rx_skbuff;
> + rx_q->queue_index = queue;
> + rx_q->priv_data = priv;
>
> - if (priv->extend_desc) {
> - priv->dma_erx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
> - sizeof(struct
> - dma_extended_desc),
> - &priv->dma_rx_phy,
> + rx_q->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE,
> + sizeof(dma_addr_t),
> GFP_KERNEL);
> - if (!priv->dma_erx)
> - goto err_dma;
> + if (!rx_q->rx_skbuff_dma)
> + return -ENOMEM;
>
> - } 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)
> + rx_q->rx_skbuff = kmalloc_array(DMA_RX_SIZE,
> + sizeof(struct sk_buff *),
> + GFP_KERNEL);
> + if (!rx_q->rx_skbuff)
> goto err_dma;
> +
> + 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;
> +
> + } 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;
> + }
> }
>
> return 0;
>
> err_dma:
> - kfree(priv->rx_skbuff);
> -err_rx_skbuff:
> - kfree(priv->rx_skbuff_dma);
> + free_dma_rx_desc_resources(priv);
> +
> return ret;
> }
>
> @@ -1333,23 +1431,15 @@ static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv)
> dma_extended_desc),
> &priv->dma_tx_phy,
> 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);
> + if (!priv->dma_etx)
> goto err_dma;
> - }
> } else {
> 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);
> + if (!priv->dma_tx)
> goto err_dma;
> - }
> }
>
> return 0;
> @@ -1371,6 +1461,7 @@ static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv)
> */
> static int alloc_dma_desc_resources(struct stmmac_priv *priv)
> {
> + /* RX Allocation */
> int ret = alloc_dma_rx_desc_resources(priv);
>
> if (ret)
> @@ -1382,29 +1473,6 @@ static int alloc_dma_desc_resources(struct stmmac_priv *priv)
> }
>
> /**
> - * free_dma_rx_desc_resources - free RX dma desc resources
> - * @priv: private structure
> - */
> -static void free_dma_rx_desc_resources(struct stmmac_priv *priv)
> -{
> - /* Release the DMA RX socket buffers */
> - dma_free_rx_skbufs(priv);
> -
> - /* Free DMA regions of consistent memory previously allocated */
> - if (!priv->extend_desc)
> - 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_RX_SIZE *
> - sizeof(struct dma_extended_desc),
> - priv->dma_erx, priv->dma_rx_phy);
> -
> - kfree(priv->rx_skbuff_dma);
> - kfree(priv->rx_skbuff);
> -}
> -
> -/**
> * free_dma_tx_desc_resources - free TX dma desc resources
> * @priv: private structure
> */
> @@ -1914,6 +1982,7 @@ 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;
> u32 dummy_dma_rx_phy = 0;
> u32 dummy_dma_tx_phy = 0;
> u32 chan = 0;
> @@ -1941,14 +2010,16 @@ 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);
> }
>
> @@ -1969,8 +2040,9 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
> chan);
> }
> } else {
> + rx_q = &priv->rx_queue[chan];
> priv->hw->dma->init(priv->ioaddr, priv->plat->dma_cfg,
> - priv->dma_tx_phy, priv->dma_rx_phy, atds);
> + priv->dma_tx_phy, rx_q->dma_rx_phy, atds);
> }
>
> if (priv->plat->axi && priv->hw->dma->axi)
> @@ -2942,9 +3014,9 @@ 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;
> @@ -2953,30 +3025,33 @@ 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 (likely(!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",
> @@ -2984,28 +3059,28 @@ 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);
> @@ -3021,31 +3096,33 @@ 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;
> }
>
> /**
> * stmmac_rx - manage the receive process
> * @priv: driver private structure
> - * @limit: napi bugget.
> + * @limit: napi bugget
> + * @queue: RX queue index.
> * 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);
> }
> @@ -3055,9 +3132,9 @@ 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,
> @@ -3068,20 +3145,20 @@ 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++;
> @@ -3091,9 +3168,9 @@ 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);
> }
> @@ -3141,7 +3218,7 @@ 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)) {
> @@ -3153,21 +3230,21 @@ 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",
> @@ -3176,12 +3253,12 @@ 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);
> }
> @@ -3211,7 +3288,7 @@ 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;
>
> @@ -3229,13 +3306,14 @@ 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;
> + int work_done = 0;
> + u32 queue = chan;
>
> priv->xstats.napi_poll++;
> stmmac_tx_clean(priv);
>
> - work_done = stmmac_rx(priv, budget);
> + work_done = stmmac_rx(priv, budget, queue);
> if (work_done < budget) {
> napi_complete_done(napi, work_done);
> stmmac_enable_dma_irq(priv, chan);
> @@ -3396,6 +3474,9 @@ 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);
> @@ -3403,7 +3484,7 @@ 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);
> }
> }
> @@ -3503,15 +3584,29 @@ 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 queue;
> +
> + 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);
> + }
> + }
>
> 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);
> }
> @@ -4026,6 +4121,26 @@ 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 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;
> + }
> +
> + priv->dirty_tx = 0;
> + priv->cur_tx = 0;
> +}
> +
> +/**
> * stmmac_resume - resume callback
> * @dev: device pointer
> * Description: when resume this function is invoked to setup the DMA and CORE
> @@ -4065,10 +4180,8 @@ 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).
> */
>
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