| Message ID | 008b01cf69cc$4d304e50$e790eaf0$%an@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2014-05-07 1:14 GMT-07:00 Byungho An <bh74.an@samsung.com>: > > This patch adds tail point update function for rx path > after rx_refill function. It indicates tail point for rx dma. > > Signed-off-by: Byungho An <bh74.an@samsung.com> > --- > drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c | 14 +++++++++++++- > drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h | 4 ++++ > drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 5 +++++ > 3 files changed, 22 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > index 49240c9..249b0e0 100644 > --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > @@ -112,7 +112,7 @@ static void sxgbe_dma_channel_init(void __iomem *ioaddr, int cha_num, > > dma_addr = dma_rx + ((r_rsize - 1) * SXGBE_DESC_SIZE_BYTES); > writel(lower_32_bits(dma_addr), > - ioaddr + SXGBE_DMA_CHA_RXDESC_LADD_REG(cha_num)); > + ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(cha_num)); > /* program the ring sizes */ > writel(t_rsize - 1, ioaddr + SXGBE_DMA_CHA_TXDESC_RINGLEN_REG(cha_num)); > writel(r_rsize - 1, ioaddr + SXGBE_DMA_CHA_RXDESC_RINGLEN_REG(cha_num)); > @@ -370,6 +370,17 @@ static void sxgbe_enable_tso(void __iomem *ioaddr, u8 chan_num) > writel(ctrl, ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num)); > } > > +static void sxgbe_dma_update_rxdesc_tail_ptr(void __iomem *ioaddr, u8 chan_num, > + dma_addr_t dma_rx_phy, int cur_rx, > + int rxsize) I think that at some point you should revisit your abstraction, all the patches that I see do take a void __iomem * argument as the first function argument, you should probably use your driver private context here. The day you support a different version of the hardware, there might be other differences that need to be taken care of. > +{ > + u32 reg_val; > + > + reg_val = (dma_rx_phy & 0xFFFFFFFF) + ((cur_rx % rxsize) * > + SXGBE_DESC_SIZE_BYTES); > + writel(reg_val, ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(chan_num)); > +} > + > static const struct sxgbe_dma_ops sxgbe_dma_ops = { > .init = sxgbe_dma_init, > .cha_init = sxgbe_dma_channel_init, > @@ -386,6 +397,7 @@ static const struct sxgbe_dma_ops sxgbe_dma_ops = { > .rx_dma_int_status = sxgbe_rx_dma_int_status, > .rx_watchdog = sxgbe_dma_rx_watchdog, > .enable_tso = sxgbe_enable_tso, > + .update_rxdesc_tail_ptr = sxgbe_dma_update_rxdesc_tail_ptr, > }; > > const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void) > diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h > index 843fa9b..a06e01e 100644 > --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h > +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h > @@ -43,6 +43,10 @@ struct sxgbe_dma_ops { > void (*rx_watchdog)(void __iomem *ioaddr, u32 riwt); > /* Enable TSO for each DMA channel */ > void (*enable_tso)(void __iomem *ioaddr, u8 chan_num); > + void (*update_rxdesc_tail_ptr)(void __iomem *ioaddr, u8 chan_num, > + dma_addr_t dma_rx, int r_rentry, > + int r_rsize); > + > }; > > const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void); > diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c > index 93bf151..7dc3449 100644 > --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c > +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c > @@ -1521,6 +1521,7 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) > skb_put(skb, frame_len); > > skb->ip_summed = checksum; > + skb->protocol = eth_type_trans(skb, priv->dev); > if (checksum == CHECKSUM_NONE) > netif_receive_skb(skb); > else > @@ -1530,6 +1531,10 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) > } > > sxgbe_rx_refill(priv); > + priv->hw->dma->update_rxdesc_tail_ptr(priv->ioaddr, qnum, > + priv->rxq[qnum]->dma_rx_phy, > + priv->rxq[qnum]->cur_rx, > + priv->dma_rx_size); > > return count; > } > -- > 1.7.10.4 > > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Florian Fainelli wrote: > 2014-05-07 1:14 GMT-07:00 Byungho An <bh74.an@samsung.com>: > > > > This patch adds tail point update function for rx path > > after rx_refill function. It indicates tail point for rx dma. > > > > Signed-off-by: Byungho An <bh74.an@samsung.com> > > --- > > drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c | 14 +++++++++++++- > > drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h | 4 ++++ > > drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 5 +++++ > > 3 files changed, 22 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > > index 49240c9..249b0e0 100644 > > --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > > +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c > > @@ -112,7 +112,7 @@ static void sxgbe_dma_channel_init(void __iomem > *ioaddr, int cha_num, > > > > dma_addr = dma_rx + ((r_rsize - 1) * SXGBE_DESC_SIZE_BYTES); > > writel(lower_32_bits(dma_addr), > > - ioaddr + SXGBE_DMA_CHA_RXDESC_LADD_REG(cha_num)); > > + ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(cha_num)); > > /* program the ring sizes */ > > writel(t_rsize - 1, ioaddr + > SXGBE_DMA_CHA_TXDESC_RINGLEN_REG(cha_num)); > > writel(r_rsize - 1, ioaddr + > SXGBE_DMA_CHA_RXDESC_RINGLEN_REG(cha_num)); > > @@ -370,6 +370,17 @@ static void sxgbe_enable_tso(void __iomem *ioaddr, > u8 chan_num) > > writel(ctrl, ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num)); > > } > > > > +static void sxgbe_dma_update_rxdesc_tail_ptr(void __iomem *ioaddr, u8 > chan_num, > > + dma_addr_t dma_rx_phy, int cur_rx, > > + int rxsize) > > I think that at some point you should revisit your abstraction, all > the patches that I see do take a void __iomem * argument as the first > function argument, you should probably use your driver private context > here. The day you support a different version of the hardware, there > might be other differences that need to be taken care of. > I agree with you, it would be more robust for different version of the hardware and make simple function argument. But most functions of this driver deal with read/write register using ioaddr. As of now I think it is enough but I'll consider it later. [snip] > > > -- > Florian -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Byungho An <bh74.an@samsung.com> : > Florian Fainelli wrote: [...] > > I think that at some point you should revisit your abstraction, all > > the patches that I see do take a void __iomem * argument as the first > > function argument, you should probably use your driver private context > > here. The day you support a different version of the hardware, there > > might be other differences that need to be taken care of. > > > I agree with you, it would be more robust for different version of the hardware and make simple function argument. > But most functions of this driver deal with read/write register using ioaddr. It does not imply that they should urge on ioaddr. drivers/net/ethernet/broadcom/tg3.c gets it right and there is no reason why sxgbe should be different. > As of now I think it is enough but I'll consider it later. In the meantime: 1) more use-once function pointers are added 2) their parameter list keeps growing Please reconsider sooner than later.
Francois Romieu wrote : > Byungho An <bh74.an@samsung.com> : > > Florian Fainelli wrote: > [...] > > > I think that at some point you should revisit your abstraction, all > > > the patches that I see do take a void __iomem * argument as the first > > > function argument, you should probably use your driver private context > > > here. The day you support a different version of the hardware, there > > > might be other differences that need to be taken care of. > > > > > I agree with you, it would be more robust for different version of the > hardware and make simple function argument. > > But most functions of this driver deal with read/write register using > ioaddr. > > It does not imply that they should urge on ioaddr. > > drivers/net/ethernet/broadcom/tg3.c gets it right and there is no reason > why sxgbe should be different. > I fully understood. > > As of now I think it is enough but I'll consider it later. > > In the meantime: > 1) more use-once function pointers are added > 2) their parameter list keeps growing > > Please reconsider sooner than later. I'll revisit above things sooner (after this patch set). Thanks. > > -- > Ueimor -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c index 49240c9..249b0e0 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c @@ -112,7 +112,7 @@ static void sxgbe_dma_channel_init(void __iomem *ioaddr, int cha_num, dma_addr = dma_rx + ((r_rsize - 1) * SXGBE_DESC_SIZE_BYTES); writel(lower_32_bits(dma_addr), - ioaddr + SXGBE_DMA_CHA_RXDESC_LADD_REG(cha_num)); + ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(cha_num)); /* program the ring sizes */ writel(t_rsize - 1, ioaddr + SXGBE_DMA_CHA_TXDESC_RINGLEN_REG(cha_num)); writel(r_rsize - 1, ioaddr + SXGBE_DMA_CHA_RXDESC_RINGLEN_REG(cha_num)); @@ -370,6 +370,17 @@ static void sxgbe_enable_tso(void __iomem *ioaddr, u8 chan_num) writel(ctrl, ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num)); } +static void sxgbe_dma_update_rxdesc_tail_ptr(void __iomem *ioaddr, u8 chan_num, + dma_addr_t dma_rx_phy, int cur_rx, + int rxsize) +{ + u32 reg_val; + + reg_val = (dma_rx_phy & 0xFFFFFFFF) + ((cur_rx % rxsize) * + SXGBE_DESC_SIZE_BYTES); + writel(reg_val, ioaddr + SXGBE_DMA_CHA_RXDESC_TAILPTR_REG(chan_num)); +} + static const struct sxgbe_dma_ops sxgbe_dma_ops = { .init = sxgbe_dma_init, .cha_init = sxgbe_dma_channel_init, @@ -386,6 +397,7 @@ static const struct sxgbe_dma_ops sxgbe_dma_ops = { .rx_dma_int_status = sxgbe_rx_dma_int_status, .rx_watchdog = sxgbe_dma_rx_watchdog, .enable_tso = sxgbe_enable_tso, + .update_rxdesc_tail_ptr = sxgbe_dma_update_rxdesc_tail_ptr, }; const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void) diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h index 843fa9b..a06e01e 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h @@ -43,6 +43,10 @@ struct sxgbe_dma_ops { void (*rx_watchdog)(void __iomem *ioaddr, u32 riwt); /* Enable TSO for each DMA channel */ void (*enable_tso)(void __iomem *ioaddr, u8 chan_num); + void (*update_rxdesc_tail_ptr)(void __iomem *ioaddr, u8 chan_num, + dma_addr_t dma_rx, int r_rentry, + int r_rsize); + }; const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void); diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index 93bf151..7dc3449 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -1521,6 +1521,7 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) skb_put(skb, frame_len); skb->ip_summed = checksum; + skb->protocol = eth_type_trans(skb, priv->dev); if (checksum == CHECKSUM_NONE) netif_receive_skb(skb); else @@ -1530,6 +1531,10 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) } sxgbe_rx_refill(priv); + priv->hw->dma->update_rxdesc_tail_ptr(priv->ioaddr, qnum, + priv->rxq[qnum]->dma_rx_phy, + priv->rxq[qnum]->cur_rx, + priv->dma_rx_size); return count; }
This patch adds tail point update function for rx path after rx_refill function. It indicates tail point for rx dma. Signed-off-by: Byungho An <bh74.an@samsung.com> --- drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.c | 14 +++++++++++++- drivers/net/ethernet/samsung/sxgbe/sxgbe_dma.h | 4 ++++ drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 5 +++++ 3 files changed, 22 insertions(+), 1 deletion(-)