* [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
@ 2021-08-20 12:48 Andrew Rybchenko
2021-09-13 19:52 ` Maxime Coquelin
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Andrew Rybchenko @ 2021-08-20 12:48 UTC (permalink / raw)
To: Maxime Coquelin, Chenbo Xia; +Cc: dev, Ivan Ilchenko
From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Report max/min/align descriptors limits in device info get callback.
Before calling the callback, rte_eth_dev_info_get() provides
default values of nb_min as zero and nb_max as UINT16_MAX that are
not correct for the driver, so one can't rely on them.
Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index e58085a2c9..601c03e079 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -33,6 +33,7 @@
#include "virtio_logs.h"
#include "virtqueue.h"
#include "virtio_rxtx.h"
+#include "virtio_rxtx_simple.h"
#include "virtio_user/virtio_user_dev.h"
static int virtio_dev_configure(struct rte_eth_dev *dev);
@@ -2536,6 +2537,30 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
if ((host_features & tso_mask) == tso_mask)
dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
+ if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) {
+ /*
+ * According to 2.7 Packed Virtqueues,
+ * 2.7.10.1 Structure Size and Alignment:
+ * The Queue Size value does not have to be a power of 2.
+ */
+ dev_info->rx_desc_lim.nb_max = UINT16_MAX;
+ } else {
+ /*
+ * According to 2.6 Split Virtqueues:
+ * Queue Size value is always a power of 2. The maximum Queue
+ * Size value is 32768.
+ */
+ dev_info->rx_desc_lim.nb_max = 32768;
+ }
+ /*
+ * Actual minimum is not the same for virtqueues of different kinds,
+ * but to avoid tangling the code with separate branches, rely on
+ * default thresholds since desc number must be at least of their size.
+ */
+ dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
+ RTE_VIRTIO_VPMD_RX_REARM_THRESH);
+ dev_info->rx_desc_lim.nb_align = 1;
+
return 0;
}
--
2.30.2
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
2021-08-20 12:48 [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get Andrew Rybchenko
@ 2021-09-13 19:52 ` Maxime Coquelin
2021-09-14 6:43 ` Andrew Rybchenko
2021-09-14 9:45 ` Maxime Coquelin
2021-09-14 11:26 ` Maxime Coquelin
2 siblings, 1 reply; 6+ messages in thread
From: Maxime Coquelin @ 2021-09-13 19:52 UTC (permalink / raw)
To: Andrew Rybchenko, Chenbo Xia; +Cc: dev, Ivan Ilchenko
On 8/20/21 2:48 PM, Andrew Rybchenko wrote:
> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>
> Report max/min/align descriptors limits in device info get callback.
> Before calling the callback, rte_eth_dev_info_get() provides
> default values of nb_min as zero and nb_max as UINT16_MAX that are
> not correct for the driver, so one can't rely on them.
>
> Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> ---
> drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index e58085a2c9..601c03e079 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -33,6 +33,7 @@
> #include "virtio_logs.h"
> #include "virtqueue.h"
> #include "virtio_rxtx.h"
> +#include "virtio_rxtx_simple.h"
> #include "virtio_user/virtio_user_dev.h"
>
> static int virtio_dev_configure(struct rte_eth_dev *dev);
> @@ -2536,6 +2537,30 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
> if ((host_features & tso_mask) == tso_mask)
> dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
>
> + if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) {
> + /*
> + * According to 2.7 Packed Virtqueues,
> + * 2.7.10.1 Structure Size and Alignment:
> + * The Queue Size value does not have to be a power of 2.
> + */
> + dev_info->rx_desc_lim.nb_max = UINT16_MAX;
> + } else {
> + /*
> + * According to 2.6 Split Virtqueues:
> + * Queue Size value is always a power of 2. The maximum Queue
> + * Size value is 32768.
> + */
> + dev_info->rx_desc_lim.nb_max = 32768;
> + }
> + /*
> + * Actual minimum is not the same for virtqueues of different kinds,
> + * but to avoid tangling the code with separate branches, rely on
> + * default thresholds since desc number must be at least of their size.
> + */
> + dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
> + RTE_VIRTIO_VPMD_RX_REARM_THRESH);
> + dev_info->rx_desc_lim.nb_align = 1;
> +
It makes sense, but shouldn't we do the same for dev_info->tx_desc_lim?
> return 0;
> }
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
2021-09-13 19:52 ` Maxime Coquelin
@ 2021-09-14 6:43 ` Andrew Rybchenko
2021-09-14 7:29 ` Maxime Coquelin
0 siblings, 1 reply; 6+ messages in thread
From: Andrew Rybchenko @ 2021-09-14 6:43 UTC (permalink / raw)
To: Maxime Coquelin, Chenbo Xia; +Cc: dev, Ivan Ilchenko
On 9/13/21 10:52 PM, Maxime Coquelin wrote:
>
>
> On 8/20/21 2:48 PM, Andrew Rybchenko wrote:
>> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>>
>> Report max/min/align descriptors limits in device info get callback.
>> Before calling the callback, rte_eth_dev_info_get() provides
>> default values of nb_min as zero and nb_max as UINT16_MAX that are
>> not correct for the driver, so one can't rely on them.
>>
>> Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
>> ---
>> drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
>> 1 file changed, 25 insertions(+)
>>
>> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
>> index e58085a2c9..601c03e079 100644
>> --- a/drivers/net/virtio/virtio_ethdev.c
>> +++ b/drivers/net/virtio/virtio_ethdev.c
>> @@ -33,6 +33,7 @@
>> #include "virtio_logs.h"
>> #include "virtqueue.h"
>> #include "virtio_rxtx.h"
>> +#include "virtio_rxtx_simple.h"
>> #include "virtio_user/virtio_user_dev.h"
>>
>> static int virtio_dev_configure(struct rte_eth_dev *dev);
>> @@ -2536,6 +2537,30 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
>> if ((host_features & tso_mask) == tso_mask)
>> dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
>>
>> + if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) {
>> + /*
>> + * According to 2.7 Packed Virtqueues,
>> + * 2.7.10.1 Structure Size and Alignment:
>> + * The Queue Size value does not have to be a power of 2.
>> + */
>> + dev_info->rx_desc_lim.nb_max = UINT16_MAX;
>> + } else {
>> + /*
>> + * According to 2.6 Split Virtqueues:
>> + * Queue Size value is always a power of 2. The maximum Queue
>> + * Size value is 32768.
>> + */
>> + dev_info->rx_desc_lim.nb_max = 32768;
>> + }
>> + /*
>> + * Actual minimum is not the same for virtqueues of different kinds,
>> + * but to avoid tangling the code with separate branches, rely on
>> + * default thresholds since desc number must be at least of their size.
>> + */
>> + dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
>> + RTE_VIRTIO_VPMD_RX_REARM_THRESH);
>> + dev_info->rx_desc_lim.nb_align = 1;
>> +
>
> It makes sense, but shouldn't we do the same for dev_info->tx_desc_lim?
Yes, you're right. We'll care about it.
I suggest to add "Rx" in the summary and care about Tx in a
subsequent patch.
net/virtio: report max/min/align Rx desc limits in dev info
OK?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
2021-09-14 6:43 ` Andrew Rybchenko
@ 2021-09-14 7:29 ` Maxime Coquelin
0 siblings, 0 replies; 6+ messages in thread
From: Maxime Coquelin @ 2021-09-14 7:29 UTC (permalink / raw)
To: Andrew Rybchenko, Chenbo Xia; +Cc: dev, Ivan Ilchenko
On 9/14/21 8:43 AM, Andrew Rybchenko wrote:
> On 9/13/21 10:52 PM, Maxime Coquelin wrote:
>>
>>
>> On 8/20/21 2:48 PM, Andrew Rybchenko wrote:
>>> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>>>
>>> Report max/min/align descriptors limits in device info get callback.
>>> Before calling the callback, rte_eth_dev_info_get() provides
>>> default values of nb_min as zero and nb_max as UINT16_MAX that are
>>> not correct for the driver, so one can't rely on them.
>>>
>>> Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>>> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
>>> ---
>>> drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
>>> 1 file changed, 25 insertions(+)
>>>
>>> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
>>> index e58085a2c9..601c03e079 100644
>>> --- a/drivers/net/virtio/virtio_ethdev.c
>>> +++ b/drivers/net/virtio/virtio_ethdev.c
>>> @@ -33,6 +33,7 @@
>>> #include "virtio_logs.h"
>>> #include "virtqueue.h"
>>> #include "virtio_rxtx.h"
>>> +#include "virtio_rxtx_simple.h"
>>> #include "virtio_user/virtio_user_dev.h"
>>>
>>> static int virtio_dev_configure(struct rte_eth_dev *dev);
>>> @@ -2536,6 +2537,30 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
>>> if ((host_features & tso_mask) == tso_mask)
>>> dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
>>>
>>> + if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) {
>>> + /*
>>> + * According to 2.7 Packed Virtqueues,
>>> + * 2.7.10.1 Structure Size and Alignment:
>>> + * The Queue Size value does not have to be a power of 2.
>>> + */
>>> + dev_info->rx_desc_lim.nb_max = UINT16_MAX;
>>> + } else {
>>> + /*
>>> + * According to 2.6 Split Virtqueues:
>>> + * Queue Size value is always a power of 2. The maximum Queue
>>> + * Size value is 32768.
>>> + */
>>> + dev_info->rx_desc_lim.nb_max = 32768;
>>> + }
>>> + /*
>>> + * Actual minimum is not the same for virtqueues of different kinds,
>>> + * but to avoid tangling the code with separate branches, rely on
>>> + * default thresholds since desc number must be at least of their size.
>>> + */
>>> + dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
>>> + RTE_VIRTIO_VPMD_RX_REARM_THRESH);
>>> + dev_info->rx_desc_lim.nb_align = 1;
>>> +
>>
>> It makes sense, but shouldn't we do the same for dev_info->tx_desc_lim?
>
> Yes, you're right. We'll care about it.
>
> I suggest to add "Rx" in the summary and care about Tx in a
> subsequent patch.
>
> net/virtio: report max/min/align Rx desc limits in dev info
>
> OK?
>
Works for me! I will fix the title while applying.
Thanks,
Maxime
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
2021-08-20 12:48 [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get Andrew Rybchenko
2021-09-13 19:52 ` Maxime Coquelin
@ 2021-09-14 9:45 ` Maxime Coquelin
2021-09-14 11:26 ` Maxime Coquelin
2 siblings, 0 replies; 6+ messages in thread
From: Maxime Coquelin @ 2021-09-14 9:45 UTC (permalink / raw)
To: Andrew Rybchenko, Chenbo Xia; +Cc: dev, Ivan Ilchenko
On 8/20/21 2:48 PM, Andrew Rybchenko wrote:
> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>
> Report max/min/align descriptors limits in device info get callback.
> Before calling the callback, rte_eth_dev_info_get() provides
> default values of nb_min as zero and nb_max as UINT16_MAX that are
> not correct for the driver, so one can't rely on them.
>
> Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> ---
> drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Thanks,
Maxime
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get
2021-08-20 12:48 [dpdk-dev] [PATCH] net/virtio: report max/min/align desc limits in dev info get Andrew Rybchenko
2021-09-13 19:52 ` Maxime Coquelin
2021-09-14 9:45 ` Maxime Coquelin
@ 2021-09-14 11:26 ` Maxime Coquelin
2 siblings, 0 replies; 6+ messages in thread
From: Maxime Coquelin @ 2021-09-14 11:26 UTC (permalink / raw)
To: Andrew Rybchenko, Chenbo Xia; +Cc: dev, Ivan Ilchenko
On 8/20/21 2:48 PM, Andrew Rybchenko wrote:
> From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
>
> Report max/min/align descriptors limits in device info get callback.
> Before calling the callback, rte_eth_dev_info_get() provides
> default values of nb_min as zero and nb_max as UINT16_MAX that are
> not correct for the driver, so one can't rely on them.
>
> Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> ---
> drivers/net/virtio/virtio_ethdev.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
Applied to dpdk-next-virtio/main.
Thanks,
Maxime
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-09-14 6:43 ` Andrew Rybchenko
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