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Date: Wed, 13 Mar 2024 17:10:54 +0800
From: Yanteng Si <siyanteng@...ngson.cn>
To: Serge Semin <fancer.lancer@...il.com>
Cc: andrew@...n.ch, hkallweit1@...il.com, peppe.cavallaro@...com,
alexandre.torgue@...s.st.com, joabreu@...opsys.com, Jose.Abreu@...opsys.com,
chenhuacai@...ngson.cn, linux@...linux.org.uk, guyinggang@...ngson.cn,
netdev@...r.kernel.org, chris.chenfeiyang@...il.com
Subject: Re: [PATCH net-next v8 01/11] net: stmmac: Add multi-channel support
Hi Serge
在 2024/3/13 15:01, Yanteng Si 写道:
> 在 2024/2/21 21:48, Serge Semin 写道:
> > Hi Yanteng
> >
> > On Mon, Feb 19, 2024 at 07:02:24PM +0800, Yanteng Si wrote:
> >> Hi Serge
> >>
> >> 在 2024/2/5 07:28, Serge Semin 写道:
> >>> On Tue, Jan 30, 2024 at 04:43:21PM +0800, Yanteng Si wrote:
> >>>> DW GMAC v3.x multi-channels feature is implemented as multiple
> >>>> sets of the same CSRs. Here is only preliminary support, it will
> >>>> be useful for the driver further evolution and for the users
> >>>> having multi-channel DWGMAC v3.x devices.
> >>>>
> >>>> Signed-off-by: Yanteng Si<siyanteng@...ngson.cn>
> >>>> Signed-off-by: Feiyang Chen<chenfeiyang@...ngson.cn>
> >>>> Signed-off-by: Yinggang Gu<guyinggang@...ngson.cn>
> >>>> ---
> >>>> .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 2 +-
> >>>> .../ethernet/stmicro/stmmac/dwmac1000_dma.c | 36 ++++++++++---------
> >>>> .../net/ethernet/stmicro/stmmac/dwmac_dma.h | 19 +++++++++-
> >>>> .../net/ethernet/stmicro/stmmac/dwmac_lib.c | 32 ++++++++---------
> >>>> drivers/net/ethernet/stmicro/stmmac/hwif.h | 2 +-
> >>>> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 6 ++--
> >>>> 6 files changed, 58 insertions(+), 39 deletions(-)
> >>>>
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> >>>> index 137741b94122..7cdfa0bdb93a 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> >>>> @@ -395,7 +395,7 @@ static void sun8i_dwmac_dma_start_tx(struct stmmac_priv *priv,
> >>>> writel(v, ioaddr + EMAC_TX_CTL1);
> >>>> }
> >>>> -static void sun8i_dwmac_enable_dma_transmission(void __iomem *ioaddr)
> >>>> +static void sun8i_dwmac_enable_dma_transmission(void __iomem *ioaddr, u32 chan)
> >>>> {
> >>>> u32 v;
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >>>> index daf79cdbd3ec..5f7b82ad3ec2 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >>>> @@ -70,15 +70,18 @@ static void dwmac1000_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
> >>>> writel(value, ioaddr + DMA_AXI_BUS_MODE);
> >>>> }
> >>>> -static void dwmac1000_dma_init(void __iomem *ioaddr,
> >>>> - struct stmmac_dma_cfg *dma_cfg, int atds)
> >>>> +static void dwmac1000_dma_init_channel(struct stmmac_priv *priv,
> >>>> + void __iomem *ioaddr,
> >>>> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_BUS_MODE);
> >>>> + u32 value;
> >>>> int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
> >>>> int rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
> >>> Reverse xmas tree please.
> >>>
> >>>> - /*
> >>>> - * Set the DMA PBL (Programmable Burst Length) mode.
> >>>> + /* common channel control register config */
> >>> Redundant comment. Please drop.
> >>>
> >>>> + value = readl(ioaddr + DMA_CHAN_BUS_MODE(chan));
> >>>> +
> >>>> + /* Set the DMA PBL (Programmable Burst Length) mode.
> >>>> *
> >>>> * Note: before stmmac core 3.50 this mode bit was 4xPBL, and
> >>>> * post 3.5 mode bit acts as 8*PBL.
> >>>> @@ -98,16 +101,15 @@ static void dwmac1000_dma_init(void __iomem *ioaddr,
> >>>> if (dma_cfg->mixed_burst)
> >>>> value |= DMA_BUS_MODE_MB;
> >>>> - if (atds)
> >>>> - value |= DMA_BUS_MODE_ATDS;
> >>>> + value |= DMA_BUS_MODE_ATDS;
> >>> No, just convert the stmmac_dma_ops.dma_init_channel() to accepting
> >>> the atds flag as I suggested in v7:
> >>> https://lore.kernel.org/netdev/vxcfrxtbfu4pya56m22icnizsyjzqqha5blzb7zpexqcur56uh@uv6vsjf77npa/
> >>>
> >>> In order to simplify this patch you can provide the
> >>> stmmac_dma_ops.dma_init_channel() and
> >>> stmmac_dma_ops.enable_dma_transmission() prototype updates in a
> >>> pre-requisite/preparation patch.
> >> Sorry to keep you waiting for so long, I finally got the machine again.
> >> Regarding atds, is this how it is implemented?
> >>
> >> On the basis of applying PATCH v8:
> >>
> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >> b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >> index 0323f0a5049c..ce99f4a1b320 100644
> >> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> >> @@ -72,7 +72,8 @@ static void dwmac1000_dma_axi(void __iomem *ioaddr, struct
> >> stmmac_axi *axi)
> >>
> >> static void dwmac1000_dma_init_channel(struct stmmac_priv *priv,
> >> void __iomem *ioaddr,
> >> - struct stmmac_dma_cfg *dma_cfg, u32 chan)
> >> + struct stmmac_dma_cfg *dma_cfg,
> >> + int atds, u32 chan)
> >> {
> >> u32 value;
> >> int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
> >> @@ -101,7 +102,8 @@ static void dwmac1000_dma_init_channel(struct
> >> stmmac_priv *priv,
> >> if (dma_cfg->mixed_burst)
> >> value |= DMA_BUS_MODE_MB;
> >>
> >> - value |= DMA_BUS_MODE_ATDS;
> >> + if (atds)
> >> + value |= DMA_BUS_MODE_ATDS;
> >>
> >> if (dma_cfg->aal)
> >> value |= DMA_BUS_MODE_AAL;
> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> >> b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> >> index 84d3a8551b03..8a79c154b553 100644
> >> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> >> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> >> @@ -117,7 +117,8 @@ static void dwmac4_dma_init_tx_chan(struct stmmac_priv
> >> *priv,
> >>
> >> static void dwmac4_dma_init_channel(struct stmmac_priv *priv,
> >> void __iomem *ioaddr,
> >> - struct stmmac_dma_cfg *dma_cfg, u32 chan)
> >> + struct stmmac_dma_cfg *dma_cfg,
> >> + int atds, u32 chan)
> >> {
> >> const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
> >> u32 value;
> >> @@ -135,7 +136,8 @@ static void dwmac4_dma_init_channel(struct stmmac_priv
> >> *priv,
> >>
> >> static void dwmac410_dma_init_channel(struct stmmac_priv *priv,
> >> void __iomem *ioaddr,
> >> - struct stmmac_dma_cfg *dma_cfg, u32 chan)
> >> + struct stmmac_dma_cfg *dma_cfg,
> >> + int atds, u32 chan)
> >> {
> >> const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
> >> u32 value;
> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> >> b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> >> index dd2ab6185c40..d1627b2e50c8 100644
> >> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> >> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> >> @@ -35,7 +35,8 @@ static void dwxgmac2_dma_init(void __iomem *ioaddr,
> >>
> >> static void dwxgmac2_dma_init_chan(struct stmmac_priv *priv,
> >> void __iomem *ioaddr,
> >> - struct stmmac_dma_cfg *dma_cfg, u32 chan)
> >> + struct stmmac_dma_cfg *dma_cfg,
> >> + int atds, u32 chan)
> >> {
> >> u32 value = readl(ioaddr + XGMAC_DMA_CH_CONTROL(chan));
> >>
> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >> b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >> index b0db38396171..fb27ad0e97e8 100644
> >> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >> @@ -178,7 +178,7 @@ struct stmmac_dma_ops {
> >> void (*init)(void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg,
> >> int atds);
> >> void (*init_chan)(struct stmmac_priv *priv, void __iomem *ioaddr,
> >> - struct stmmac_dma_cfg *dma_cfg, u32 chan);
> >> + struct stmmac_dma_cfg *dma_cfg, int atds, u32 chan);
> >> void (*init_rx_chan)(struct stmmac_priv *priv, void __iomem *ioaddr,
> >> struct stmmac_dma_cfg *dma_cfg,
> >> dma_addr_t phy, u32 chan);
> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >> b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >> index 3eed202d1f1c..8705e04913d1 100644
> >> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >> @@ -3039,7 +3039,7 @@ static int stmmac_init_dma_engine(struct stmmac_priv
> >> *priv)
> >>
> >> /* DMA CSR Channel configuration */
> >> for (chan = 0; chan < dma_csr_ch; chan++) {
> >> - stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
> >> + stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, atds,
> >> chan);
> >> stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 1);
> >> }
> >>
> >> @@ -6963,6 +6963,7 @@ int stmmac_xdp_open(struct net_device *dev)
> >> u32 buf_size;
> >> bool sph_en;
> >> u32 chan;
> >> + int atds;
> >> int ret;
> >>
> >> ret = alloc_dma_desc_resources(priv, &priv->dma_conf);
> >> @@ -6981,9 +6982,12 @@ int stmmac_xdp_open(struct net_device *dev)
> >>
> >> stmmac_reset_queues_param(priv);
> >>
> >> + if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
> >> + atds = 1;
> >> +
> >> /* DMA CSR Channel configuration */
> >> for (chan = 0; chan < dma_csr_ch; chan++) {
> >> - stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
> >> + stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, atds,
> >> chan);
> >> stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 1);
> >> }
> > Looking more thoroughly at this part I suggest to act a bit
> > differently. Let's move the atds flag to the stmmac_dma_cfg structure.
> > Alternate Descriptor Size (ATDS) is a part of the DMA-configs together
> > with the PBL, ALL, AEME, etc so the structure is the most suitable
> > place for it. Here is what should be done for that:
> > 1. Add stmmac_dma_cfg::atds boolean field.
> > 2. Drop atds argument from the stmmac_dma_ops::init() callback and use
> > the stmmac_dma_cfg::atds field in the callback implementations.
> > 3. Alter stmmac_init_dma_engine() to updating the dma_cfg->atds field
> > instead of the local variable.
> >
> > Please implement that update in a pre-requisite/preparation patch.
> >
> > After that you can freely use the stmmac_dma_cfg::atds field in the
> > stmmac_init_chan() method too.
>
> OK.
>
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> index b57e1325ce62..dabd6a3772f2 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
> @@ -66,8 +66,7 @@ struct loongson_data {
>
> static void loongson_gnet_dma_init_channel(struct stmmac_priv *priv,
> void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg,
> - int atds, u32 chan)
> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> {
> int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
> int rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
> @@ -96,7 +95,7 @@ static void loongson_gnet_dma_init_channel(struct stmmac_priv
> *priv,
> if (dma_cfg->mixed_burst)
> value |= DMA_BUS_MODE_MB;
>
> - if (atds)
> + if (dma_cfg->atds)
> value |= DMA_BUS_MODE_ATDS;
>
> if (dma_cfg->aal)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> index 7001a86425ea..ae9240736e64 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> @@ -299,7 +299,7 @@ static int sun8i_dwmac_dma_reset(void __iomem *ioaddr)
> * Called from stmmac via stmmac_dma_ops->init
> */
> static void sun8i_dwmac_dma_init(void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg, int atds)
> + struct stmmac_dma_cfg *dma_cfg)
> {
> writel(EMAC_RX_INT | EMAC_TX_INT, ioaddr + EMAC_INT_EN);
> writel(0x1FFFFFF, ioaddr + EMAC_INT_STA);
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> index fd5ecc043251..66c0c22908b1 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
> @@ -72,8 +72,7 @@ static void dwmac1000_dma_axi(void __iomem *ioaddr, struct
> stmmac_axi *axi)
>
> static void dwmac1000_dma_init_channel(struct stmmac_priv *priv,
> void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg,
> - int atds, u32 chan)
> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> {
> int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
> int rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
> @@ -101,7 +100,7 @@ static void dwmac1000_dma_init_channel(struct stmmac_priv *priv,
> if (dma_cfg->mixed_burst)
> value |= DMA_BUS_MODE_MB;
>
> - if (atds)
> + if (dma_cfg->atds)
> value |= DMA_BUS_MODE_ATDS;
>
> if (dma_cfg->aal)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
> index dea270f60cc3..f861babc06f9 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
> @@ -19,7 +19,7 @@
> #include "dwmac_dma.h"
>
> static void dwmac100_dma_init(void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg, int atds)
> + struct stmmac_dma_cfg *dma_cfg)
> {
> /* Enable Application Access by writing to DMA CSR0 */
> writel(DMA_BUS_MODE_DEFAULT | (dma_cfg->pbl << DMA_BUS_MODE_PBL_SHIFT),
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> index 8a79c154b553..e0165358c4ac 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> @@ -117,8 +117,7 @@ static void dwmac4_dma_init_tx_chan(struct stmmac_priv *priv,
>
> static void dwmac4_dma_init_channel(struct stmmac_priv *priv,
> void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg,
> - int atds, u32 chan)
> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> {
> const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
> u32 value;
> @@ -136,8 +135,7 @@ static void dwmac4_dma_init_channel(struct stmmac_priv *priv,
>
> static void dwmac410_dma_init_channel(struct stmmac_priv *priv,
> void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg,
> - int atds, u32 chan)
> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> {
> const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
> u32 value;
> @@ -155,7 +153,7 @@ static void dwmac410_dma_init_channel(struct stmmac_priv *priv,
> }
>
> static void dwmac4_dma_init(void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg, int atds)
> + struct stmmac_dma_cfg *dma_cfg)
> {
> u32 value = readl(ioaddr + DMA_SYS_BUS_MODE);
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> index d1627b2e50c8..7840bc403788 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> @@ -20,7 +20,7 @@ static int dwxgmac2_dma_reset(void __iomem *ioaddr)
> }
>
> static void dwxgmac2_dma_init(void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg, int atds)
> + struct stmmac_dma_cfg *dma_cfg)
> {
> u32 value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE);
>
> @@ -35,8 +35,7 @@ static void dwxgmac2_dma_init(void __iomem *ioaddr,
>
> static void dwxgmac2_dma_init_chan(struct stmmac_priv *priv,
> void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg,
> - int atds, u32 chan)
> + struct stmmac_dma_cfg *dma_cfg, u32 chan)
> {
> u32 value = readl(ioaddr + XGMAC_DMA_CH_CONTROL(chan));
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> index fb27ad0e97e8..3b20fb7f3a61 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> @@ -175,10 +175,9 @@ struct dma_features;
> struct stmmac_dma_ops {
> /* DMA core initialization */
> int (*reset)(void __iomem *ioaddr);
> - void (*init)(void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg,
> - int atds);
> + void (*init)(void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg);
> void (*init_chan)(struct stmmac_priv *priv, void __iomem *ioaddr,
> - struct stmmac_dma_cfg *dma_cfg, int atds, u32 chan);
> + struct stmmac_dma_cfg *dma_cfg, u32 chan);
> void (*init_rx_chan)(struct stmmac_priv *priv, void __iomem *ioaddr,
> struct stmmac_dma_cfg *dma_cfg,
> dma_addr_t phy, u32 chan);
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 7c656f970575..957dfabc663d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -3013,7 +3013,6 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
> struct stmmac_rx_queue *rx_q;
> struct stmmac_tx_queue *tx_q;
> u32 chan = 0;
> - int atds = 0;
> int ret = 0;
>
> if (!priv->plat->dma_cfg || !priv->plat->dma_cfg->pbl) {
> @@ -3022,7 +3021,7 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
> }
>
> if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
> - atds = 1;
> + priv->plat->dma_cfg->atds = 1;
>
> ret = stmmac_reset(priv, priv->ioaddr);
> if (ret) {
> @@ -3031,14 +3030,14 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
> }
>
> /* DMA Configuration */
> - stmmac_dma_init(priv, priv->ioaddr, priv->plat->dma_cfg, atds);
> + stmmac_dma_init(priv, priv->ioaddr, priv->plat->dma_cfg);
>
> if (priv->plat->axi)
> stmmac_axi(priv, priv->ioaddr, priv->plat->axi);
>
> /* DMA CSR Channel configuration */
> for (chan = 0; chan < dma_csr_ch; chan++) {
> - stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, atds, chan);
> + stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
> stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 1);
> }
>
> @@ -6962,7 +6961,6 @@ int stmmac_xdp_open(struct net_device *dev)
> u32 buf_size;
> bool sph_en;
> u32 chan;
> - int atds;
> int ret;
>
> ret = alloc_dma_desc_resources(priv, &priv->dma_conf);
> @@ -6981,12 +6979,9 @@ int stmmac_xdp_open(struct net_device *dev)
>
> stmmac_reset_queues_param(priv);
>
> - if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
> - atds = 1;
> -
> /* DMA CSR Channel configuration */
> for (chan = 0; chan < dma_csr_ch; chan++) {
> - stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, atds, chan);
> + stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
> stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 1);
> }
>
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
> index 23bfe3c1465f..c827dc1213b9 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -100,6 +100,7 @@ struct stmmac_dma_cfg {
> bool eame;
> bool multi_msi_en;
> bool dche;
> + bool atds;
> };
>
> #define AXI_BLEN 7
>
>
> Thanks,
>
> Yanteng
>
> >
> > -Serge(y)
> >
> >>
> >> Thanks,
> >>
> >> Yanteng
> >>
> >>>> if (dma_cfg->aal)
> >>>> value |= DMA_BUS_MODE_AAL;
> >>>> - writel(value, ioaddr + DMA_BUS_MODE);
> >>>> + writel(value, ioaddr + DMA_CHAN_BUS_MODE(chan));
> >>>> /* Mask interrupts by writing to CSR7 */
> >>>> - writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
> >>>> + writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_CHAN_INTR_ENA(chan));
> >>>> }
> >>>> static void dwmac1000_dma_init_rx(struct stmmac_priv *priv,
> >>>> @@ -116,7 +118,7 @@ static void dwmac1000_dma_init_rx(struct stmmac_priv *priv,
> >>>> dma_addr_t dma_rx_phy, u32 chan)
> >>>> {
> >>>> /* RX descriptor base address list must be written into DMA CSR3 */
> >>>> - writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_RCV_BASE_ADDR);
> >>>> + writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_CHAN_RCV_BASE_ADDR(chan));
> >>>> }
> >>>> static void dwmac1000_dma_init_tx(struct stmmac_priv *priv,
> >>>> @@ -125,7 +127,7 @@ static void dwmac1000_dma_init_tx(struct stmmac_priv *priv,
> >>>> dma_addr_t dma_tx_phy, u32 chan)
> >>>> {
> >>>> /* TX descriptor base address list must be written into DMA CSR4 */
> >>>> - writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_TX_BASE_ADDR);
> >>>> + writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_CHAN_TX_BASE_ADDR(chan));
> >>>> }
> >>>> static u32 dwmac1000_configure_fc(u32 csr6, int rxfifosz)
> >>>> @@ -153,7 +155,7 @@ static void dwmac1000_dma_operation_mode_rx(struct stmmac_priv *priv,
> >>>> void __iomem *ioaddr, int mode,
> >>>> u32 channel, int fifosz, u8 qmode)
> >>>> {
> >>>> - u32 csr6 = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 csr6 = readl(ioaddr + DMA_CHAN_CONTROL(channel));
> >>>> if (mode == SF_DMA_MODE) {
> >>>> pr_debug("GMAC: enable RX store and forward mode\n");
> >>>> @@ -175,14 +177,14 @@ static void dwmac1000_dma_operation_mode_rx(struct stmmac_priv *priv,
> >>>> /* Configure flow control based on rx fifo size */
> >>>> csr6 = dwmac1000_configure_fc(csr6, fifosz);
> >>>> - writel(csr6, ioaddr + DMA_CONTROL);
> >>>> + writel(csr6, ioaddr + DMA_CHAN_CONTROL(channel));
> >>>> }
> >>>> static void dwmac1000_dma_operation_mode_tx(struct stmmac_priv *priv,
> >>>> void __iomem *ioaddr, int mode,
> >>>> u32 channel, int fifosz, u8 qmode)
> >>>> {
> >>>> - u32 csr6 = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 csr6 = readl(ioaddr + DMA_CHAN_CONTROL(channel));
> >>>> if (mode == SF_DMA_MODE) {
> >>>> pr_debug("GMAC: enable TX store and forward mode\n");
> >>>> @@ -209,7 +211,7 @@ static void dwmac1000_dma_operation_mode_tx(struct stmmac_priv *priv,
> >>>> csr6 |= DMA_CONTROL_TTC_256;
> >>>> }
> >>>> - writel(csr6, ioaddr + DMA_CONTROL);
> >>>> + writel(csr6, ioaddr + DMA_CHAN_CONTROL(channel));
> >>>> }
> >>>> static void dwmac1000_dump_dma_regs(struct stmmac_priv *priv,
> >>>> @@ -271,12 +273,12 @@ static int dwmac1000_get_hw_feature(void __iomem *ioaddr,
> >>>> static void dwmac1000_rx_watchdog(struct stmmac_priv *priv,
> >>>> void __iomem *ioaddr, u32 riwt, u32 queue)
> >>>> {
> >>>> - writel(riwt, ioaddr + DMA_RX_WATCHDOG);
> >>>> + writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(queue));
> >>>> }
> >>>> const struct stmmac_dma_ops dwmac1000_dma_ops = {
> >>>> .reset = dwmac_dma_reset,
> >>>> - .init = dwmac1000_dma_init,
> >>>> + .init_chan = dwmac1000_dma_init_channel,
> >>>> .init_rx_chan = dwmac1000_dma_init_rx,
> >>>> .init_tx_chan = dwmac1000_dma_init_tx,
> >>>> .axi = dwmac1000_dma_axi,
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
> >>>> index 72672391675f..593be79c46e1 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
> >>>> @@ -148,11 +148,14 @@
> >>>> DMA_STATUS_TI | \
> >>>> DMA_STATUS_MSK_COMMON)
> >>>> +/* Following DMA defines are chanels oriented */ \
> >>>> +#define DMA_CHAN_OFFSET 0x100 |-------------+
> >>>> + / |
> >>> |
> >>> Please move all of these ---------------------------------------------+-------------------------+
> >>> to being defined just below the DMA_MISSED_FRAME_CTR macros definition. |
> >>> The point is to keep a coherency between dwmac_dma.h and dwmac4_dma.h. |
> >>> The later header file has first generic DMA-related macros defined |
> >>> (CSR addresses and flags) and then the channel-specific ones (CSR |
> >>> addresses and flags). Since in case of the DW GMAC v3.x the |
> >>> multi-channels are implemented as a copy of all the DMA CSRs let's |
> >>> preserve the logic of having all CSR address defined first, then the |
> >>> CSR flags. |
> >>> |
> >>>> #define NUM_DWMAC100_DMA_REGS 9 |
> >>>> #define NUM_DWMAC1000_DMA_REGS 23 |
> >>>> #define NUM_DWMAC4_DMA_REGS 27 |
> >>>> |
> >>>> -void dwmac_enable_dma_transmission(void __iomem *ioaddr); |
> >>>> +void dwmac_enable_dma_transmission(void __iomem *ioaddr, u32 chan); |
> >>>> void dwmac_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr, |
> >>>> u32 chan, bool rx, bool tx); |
> >>>> void dwmac_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr, |
> >>>> @@ -169,4 +172,18 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr, |
> >>>> struct stmmac_extra_stats *x, u32 chan, u32 dir); |
> >>>> int dwmac_dma_reset(void __iomem *ioaddr); |
> >>>> |
> >>> |
> >>>> +static inline u32 dma_chan_base_addr(u32 base, u32 chan) \ |
> >>>> +{ | |
> >>>> + return base + chan * DMA_CHAN_OFFSET; | |
> >>>> +} | |
> >>>> + | |
> >>>> +#define DMA_CHAN_XMT_POLL_DEMAND(chan) dma_chan_base_addr(DMA_XMT_POLL_DEMAND, chan) | |
> >>>> +#define DMA_CHAN_INTR_ENA(chan) dma_chan_base_addr(DMA_INTR_ENA, chan) | |
> >>>> +#define DMA_CHAN_CONTROL(chan) dma_chan_base_addr(DMA_CONTROL, chan) | |
> >>>> +#define DMA_CHAN_STATUS(chan) dma_chan_base_addr(DMA_STATUS, chan) |-+
> >>>> +#define DMA_CHAN_BUS_MODE(chan) dma_chan_base_addr(DMA_BUS_MODE, chan) |
> >>>> +#define DMA_CHAN_RCV_BASE_ADDR(chan) dma_chan_base_addr(DMA_RCV_BASE_ADDR, chan) |
> >>>> +#define DMA_CHAN_TX_BASE_ADDR(chan) dma_chan_base_addr(DMA_TX_BASE_ADDR, chan) |
> >>>> +#define DMA_CHAN_RX_WATCHDOG(chan) dma_chan_base_addr(DMA_RX_WATCHDOG, chan) |
> >>>> + /
> >>>> #endif /* __DWMAC_DMA_H__ */
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
> >>>> index 7907d62d3437..b37368137810 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
> >>>> @@ -28,65 +28,65 @@ int dwmac_dma_reset(void __iomem *ioaddr)
> >>>> }
> >>>> /* CSR1 enables the transmit DMA to check for new descriptor */
> >>>> -void dwmac_enable_dma_transmission(void __iomem *ioaddr)
> >>>> +void dwmac_enable_dma_transmission(void __iomem *ioaddr, u32 chan)
> >>>> {
> >>>> - writel(1, ioaddr + DMA_XMT_POLL_DEMAND);
> >>>> + writel(1, ioaddr + DMA_CHAN_XMT_POLL_DEMAND(chan));
> >>>> }
> >>>> void dwmac_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> u32 chan, bool rx, bool tx)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_INTR_ENA);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
> >>>> if (rx)
> >>>> value |= DMA_INTR_DEFAULT_RX;
> >>>> if (tx)
> >>>> value |= DMA_INTR_DEFAULT_TX;
> >>>> - writel(value, ioaddr + DMA_INTR_ENA);
> >>>> + writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
> >>>> }
> >>>> void dwmac_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> u32 chan, bool rx, bool tx)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_INTR_ENA);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
> >>>> if (rx)
> >>>> value &= ~DMA_INTR_DEFAULT_RX;
> >>>> if (tx)
> >>>> value &= ~DMA_INTR_DEFAULT_TX;
> >>>> - writel(value, ioaddr + DMA_INTR_ENA);
> >>>> + writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
> >>>> }
> >>>> void dwmac_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> u32 chan)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> value |= DMA_CONTROL_ST;
> >>>> - writel(value, ioaddr + DMA_CONTROL);
> >>>> + writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> }
> >>>> void dwmac_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> value &= ~DMA_CONTROL_ST;
> >>>> - writel(value, ioaddr + DMA_CONTROL);
> >>>> + writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> }
> >>>> void dwmac_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> u32 chan)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> value |= DMA_CONTROL_SR;
> >>>> - writel(value, ioaddr + DMA_CONTROL);
> >>>> + writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> }
> >>>> void dwmac_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan)
> >>>> {
> >>>> - u32 value = readl(ioaddr + DMA_CONTROL);
> >>>> + u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> value &= ~DMA_CONTROL_SR;
> >>>> - writel(value, ioaddr + DMA_CONTROL);
> >>>> + writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
> >>>> }
> >>>> #ifdef DWMAC_DMA_DEBUG
> >>>> @@ -166,7 +166,7 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> struct stmmac_txq_stats *txq_stats = &priv->xstats.txq_stats[chan];
> >>>> int ret = 0;
> >>>> /* read the status register (CSR5) */
> >>>> - u32 intr_status = readl(ioaddr + DMA_STATUS);
> >>>> + u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(chan));
> >>>> #ifdef DWMAC_DMA_DEBUG
> >>>> /* Enable it to monitor DMA rx/tx status in case of critical problems */
> >>>> @@ -236,7 +236,7 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> pr_warn("%s: unexpected status %08x\n", __func__, intr_status);
> >>>> /* Clear the interrupt by writing a logic 1 to the CSR5[15-0] */
> >>>> - writel((intr_status & 0x1ffff), ioaddr + DMA_STATUS);
> >>>> + writel((intr_status & 0x7ffff), ioaddr + DMA_CHAN_STATUS(chan));
> >>> Isn't the mask change going to be implemented in the framework of the
> >>> Loongson-specific DMA-interrupt handler in some of the further patches?
> >>>
> >>>
> >>> I'll get back to reviewing the series tomorrow (later today)...
> >>>
> >>> -Serge(y)
> >>>
> >>>> return ret;
> >>>> }
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >>>> index 7be04b54738b..b0db38396171 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> >>>> @@ -198,7 +198,7 @@ struct stmmac_dma_ops {
> >>>> /* To track extra statistic (if supported) */
> >>>> void (*dma_diagnostic_fr)(struct stmmac_extra_stats *x,
> >>>> void __iomem *ioaddr);
> >>>> - void (*enable_dma_transmission) (void __iomem *ioaddr);
> >>>> + void (*enable_dma_transmission)(void __iomem *ioaddr, u32 chan);
> >>>> void (*enable_dma_irq)(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> u32 chan, bool rx, bool tx);
> >>>> void (*disable_dma_irq)(struct stmmac_priv *priv, void __iomem *ioaddr,
> >>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >>>> index b334eb16da23..5617b40abbe4 100644
> >>>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >>>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> >>>> @@ -2558,7 +2558,7 @@ static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget)
> >>>> true, priv->mode, true, true,
> >>>> xdp_desc.len);
> >>>> - stmmac_enable_dma_transmission(priv, priv->ioaddr);
> >>>> + stmmac_enable_dma_transmission(priv, priv->ioaddr, queue);
> >>>> xsk_tx_metadata_to_compl(meta,
> >>>> &tx_q->tx_skbuff_dma[entry].xsk_meta);
> >>>> @@ -4706,7 +4706,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
> >>>> netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len);
> >>>> - stmmac_enable_dma_transmission(priv, priv->ioaddr);
> >>>> + stmmac_enable_dma_transmission(priv, priv->ioaddr, queue);
> >>>> stmmac_flush_tx_descriptors(priv, queue);
> >>>> stmmac_tx_timer_arm(priv, queue);
> >>>> @@ -4926,7 +4926,7 @@ static int stmmac_xdp_xmit_xdpf(struct stmmac_priv *priv, int queue,
> >>>> u64_stats_update_end_irqrestore(&txq_stats->syncp, flags);
> >>>> }
> >>>> - stmmac_enable_dma_transmission(priv, priv->ioaddr);
> >>>> + stmmac_enable_dma_transmission(priv, priv->ioaddr, queue);
> >>>> entry = STMMAC_GET_ENTRY(entry, priv->dma_conf.dma_tx_size);
> >>>> tx_q->cur_tx = entry;
> >>>> --
> >>>> 2.31.4
> >>>>
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