Hi,
Some DWMAC IPs support tx coe only for few initial tx queues, starting
from tx queue 0. This patchset adds support for tx coe sw fallback for
those queue that doesn't support tx coe. Also, add binding for
snps,tx-queues-with-coe property.
Rohan G Thomas (2):
dt-bindings: net: snps,dwmac: Tx queues with coe
net: stmmac: Tx coe sw fallback
.../devicetree/bindings/net/snps,dwmac.yaml | 3 +++
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 ++
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 +++++++++++++++++++
.../ethernet/stmicro/stmmac/stmmac_platform.c | 4 ++++
include/linux/stmmac.h | 1 +
5 files changed, 29 insertions(+)
--
2.26.2
Add sw fallback of tx checksum calculation for those tx queues that
doesn't support tx checksum offloading. Because, some DWMAC IPs
support tx checksum offloading only for few initial tx queues,
starting from tx queue 0.
Signed-off-by: Rohan G Thomas <[email protected]>
---
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 ++
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 +++++++++++++++++++
.../ethernet/stmicro/stmmac/stmmac_platform.c | 4 ++++
include/linux/stmmac.h | 1 +
4 files changed, 26 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 3401e888a9f6..f526bcaaaf64 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -219,6 +219,8 @@ struct stmmac_priv {
int hwts_tx_en;
bool tx_path_in_lpi_mode;
bool tso;
+ bool tx_q_coe_lmt;
+ u32 tx_q_with_coe;
int sph;
int sph_cap;
u32 sarc_type;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index fcab363d8dfa..e095a9bd93b1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4409,6 +4409,17 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
WARN_ON(tx_q->tx_skbuff[first_entry]);
csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
+ /* Some DWMAC IPs support tx coe only for a few initial tx queues,
+ * starting from tx queue 0. So checksum offloading for those queues
+ * that doesn't support tx coe need to fallback to software checksum
+ * calculation.
+ */
+ if (csum_insertion && priv->tx_q_coe_lmt &&
+ queue >= priv->tx_q_with_coe) {
+ if (unlikely(skb_checksum_help(skb)))
+ goto dma_map_err;
+ csum_insertion = !csum_insertion;
+ }
if (likely(priv->extend_desc))
desc = (struct dma_desc *)(tx_q->dma_etx + entry);
@@ -7386,6 +7397,14 @@ int stmmac_dvr_probe(struct device *device,
dev_info(priv->device, "SPH feature enabled\n");
}
+ if (priv->plat->tx_coe &&
+ priv->plat->tx_queues_with_coe < priv->plat->tx_queues_to_use) {
+ priv->tx_q_coe_lmt = true;
+ priv->tx_q_with_coe = priv->plat->tx_queues_with_coe;
+ dev_info(priv->device, "TX COE limited to %u tx queues\n",
+ priv->tx_q_with_coe);
+ }
+
/* Ideally our host DMA address width is the same as for the
* device. However, it may differ and then we have to use our
* host DMA width for allocation and the device DMA width for
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index be8e79c7aa34..0138b7c9c7ab 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -225,6 +225,10 @@ static int stmmac_mtl_setup(struct platform_device *pdev,
&plat->tx_queues_to_use))
plat->tx_queues_to_use = 1;
+ if (of_property_read_u32(tx_node, "snps,tx-queues-with-coe",
+ &plat->tx_queues_with_coe))
+ plat->tx_queues_with_coe = plat->tx_queues_to_use;
+
if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 652404c03944..795c10d19c1c 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -252,6 +252,7 @@ struct plat_stmmacenet_data {
u32 host_dma_width;
u32 rx_queues_to_use;
u32 tx_queues_to_use;
+ u32 tx_queues_with_coe;
u8 rx_sched_algorithm;
u8 tx_sched_algorithm;
struct stmmac_rxq_cfg rx_queues_cfg[MTL_MAX_RX_QUEUES];
--
2.26.2
Add dt-bindings for the number of tx queues with coe support. Some
dwmac IPs support tx queues only for few initial tx queues, starting
from tx queue 0.
Signed-off-by: Rohan G Thomas <[email protected]>
---
Documentation/devicetree/bindings/net/snps,dwmac.yaml | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index ddf9522a5dc2..ad26a32e0557 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -313,6 +313,9 @@ properties:
snps,tx-queues-to-use:
$ref: /schemas/types.yaml#/definitions/uint32
description: number of TX queues to be used in the driver
+ snps,tx-queues-with-coe:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: number of TX queues support TX checksum offloading
snps,tx-sched-wrr:
type: boolean
description: Weighted Round Robin
--
2.26.2
On Thu, Aug 10, 2023 at 11:03:27PM +0800, Rohan G Thomas wrote:
> Add dt-bindings for the number of tx queues with coe support. Some
> dwmac IPs support tx queues only for few initial tx queues, starting
> from tx queue 0.
>
> Signed-off-by: Rohan G Thomas <[email protected]>
> ---
> Documentation/devicetree/bindings/net/snps,dwmac.yaml | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> index ddf9522a5dc2..ad26a32e0557 100644
> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> @@ -313,6 +313,9 @@ properties:
> snps,tx-queues-to-use:
> $ref: /schemas/types.yaml#/definitions/uint32
> description: number of TX queues to be used in the driver
> + snps,tx-queues-with-coe:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: number of TX queues support TX checksum offloading
Either you omitted a "ing" or a whole word from this description.
> snps,tx-sched-wrr:
> type: boolean
> description: Weighted Round Robin
> --
> 2.26.2
>
Dear Conor,
On Thu, Aug 10, 2023 at 11:03:27PM +0800, Rohan G Thomas wrote:
> > Add dt-bindings for the number of tx queues with coe support. Some
> > dwmac IPs support tx queues only for few initial tx queues, starting
> > from tx queue 0.
> >
> > Signed-off-by: Rohan G Thomas <[email protected]>
> > ---
> > Documentation/devicetree/bindings/net/snps,dwmac.yaml | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > index ddf9522a5dc2..ad26a32e0557 100644
> > --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > @@ -313,6 +313,9 @@ properties:
> > snps,tx-queues-to-use:
> > $ref: /schemas/types.yaml#/definitions/uint32
> > description: number of TX queues to be used in the driver
> > + snps,tx-queues-with-coe:
> > + $ref: /schemas/types.yaml#/definitions/uint32
> > + description: number of TX queues support TX checksum
> > + offloading
>
> Either you omitted a "ing" or a whole word from this description.
Thanks for pointing this out. Will fix it in the next?version as below,
description: number of TX queues that supports TX checksum offloading
>
> > snps,tx-sched-wrr:
> > type: boolean
> > description: Weighted Round Robin
> > --
> > 2.26.2
> >
Best Regards,
Rohan
Hi,
Some DWMAC IPs support tx coe only for a few initial tx queues,
starting from tx queue 0. This patchset adds support for tx coe sw
fallback for those queues that don't support tx coe. Also, add binding
for snps,tx-queues-with-coe property.
changelog v2:
* Reformed binding description.
* Minor grammatical corrections in comments and commit messages.
Rohan G Thomas (2):
dt-bindings: net: snps,dwmac: Tx queues with coe
net: stmmac: Tx coe sw fallback
.../devicetree/bindings/net/snps,dwmac.yaml | 3 +++
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 ++
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 +++++++++++++++++++
.../ethernet/stmicro/stmmac/stmmac_platform.c | 4 ++++
include/linux/stmmac.h | 1 +
5 files changed, 29 insertions(+)
--
2.19.0
On 10/08/2023 17:03, Rohan G Thomas wrote:
> Add dt-bindings for the number of tx queues with coe support. Some
> dwmac IPs support tx queues only for few initial tx queues, starting
> from tx queue 0.
>
> Signed-off-by: Rohan G Thomas <[email protected]>
Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC. It might happen, that command when run on an older
kernel, gives you outdated entries. Therefore please be sure you base
your patches on recent Linux kernel.
You missed at least DT list (maybe more), so this won't be tested by
automated tooling. Performing review on untested code might be a waste
of time, thus I will skip this patch entirely till you follow the
process allowing the patch to be tested.
Please kindly resend and include all necessary To/Cc entries.
Best regards,
Krzysztof