github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 02:53:36 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

net: pass queue rx page size from memory provider

Browse Source 
Allow memory providers to configure rx queues with a custom receive
page size. It's passed in struct pp_memory_provider_params, which is
copied into the queue, so it's preserved across queue restarts. Then,
it's propagated to the driver in a new queue config parameter.

Drivers should explicitly opt into using it by setting
QCFG_RX_PAGE_SIZE, in which case they should implement ndo_default_qcfg,
validate the size on queue restart and honour the current config in case
of a reset.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
This commit is contained in:
Pavel Begunkov 2026-01-06 13:25:40 +00:00
parent efcb9a4d32
commit c0b709bf43
3 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/net/netdev_queues.h
View File

@ -15,6 +15,7 @@ struct netdev_config {
};
struct netdev_queue_config {
u32 rx_page_size;
};
/* See the netdev.yaml spec for definition of each statistic */
@ -114,6 +115,11 @@ void netdev_stat_queue_sum(struct net_device *netdev,
int tx_start, int tx_end,
struct netdev_queue_stats_tx *tx_sum);
enum {
/* The queue checks and honours the page size qcfg parameter */
QCFG_RX_PAGE_SIZE = 0x1,
};
/**
* struct netdev_queue_mgmt_ops - netdev ops for queue management
*
@ -135,6 +141,8 @@ void netdev_stat_queue_sum(struct net_device *netdev,
*
* @ndo_default_qcfg: Populate queue config struct with defaults. Optional.
*
* @supported_params: Bitmask of supported parameters, see QCFG_*.
*
* Note that @ndo_queue_mem_alloc and @ndo_queue_mem_free may be called while
* the interface is closed. @ndo_queue_start and @ndo_queue_stop will only
* be called for an interface which is open.
@ -158,6 +166,8 @@ struct netdev_queue_mgmt_ops {
struct netdev_queue_config *qcfg);
struct device * (*ndo_queue_get_dma_dev)(struct net_device *dev,
int idx);
unsigned int supported_params;
};
bool netif_rxq_has_unreadable_mp(struct net_device *dev, int idx);

1
include/net/page_pool/types.h
View File

@ -161,6 +161,7 @@ struct memory_provider_ops;
struct pp_memory_provider_params {
void *mp_priv;
const struct memory_provider_ops *mp_ops;
u32 rx_page_size;
};
struct page_pool {

9
net/core/netdev_rx_queue.c
View File

@ -30,12 +30,21 @@ int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq_idx)
!qops->ndo_queue_mem_alloc || !qops->ndo_queue_start)
return -EOPNOTSUPP;
if (WARN_ON_ONCE(qops->supported_params && !qops->ndo_default_qcfg))
return -EINVAL;
netdev_assert_locked(dev);
memset(&qcfg, 0, sizeof(qcfg));
if (qops->ndo_default_qcfg)
qops->ndo_default_qcfg(dev, &qcfg);
if (rxq->mp_params.rx_page_size) {
if (!(qops->supported_params & QCFG_RX_PAGE_SIZE))
return -EOPNOTSUPP;
qcfg.rx_page_size = rxq->mp_params.rx_page_size;
}
new_mem = kvzalloc(qops->ndo_queue_mem_size, GFP_KERNEL);
if (!new_mem)
return -ENOMEM;