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-rw-r--r--Documentation/netlink/specs/netdev.yaml15
-rw-r--r--include/net/netmem.h21
-rw-r--r--include/net/page_pool/memory_provider.h45
-rw-r--r--include/net/page_pool/types.h4
-rw-r--r--include/uapi/linux/netdev.h7
-rw-r--r--net/core/dev.c16
-rw-r--r--net/core/devmem.c93
-rw-r--r--net/core/devmem.h49
-rw-r--r--net/core/netdev-genl.c11
-rw-r--r--net/core/netdev_rx_queue.c69
-rw-r--r--net/core/page_pool.c51
-rw-r--r--net/core/page_pool_user.c7
-rw-r--r--net/ipv4/tcp.c7
-rw-r--r--tools/include/uapi/linux/netdev.h7
14 files changed, 321 insertions, 81 deletions
diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
index cbb544bd6c84..288923e965ae 100644
--- a/Documentation/netlink/specs/netdev.yaml
+++ b/Documentation/netlink/specs/netdev.yaml
@@ -115,6 +115,9 @@ attribute-sets:
type: u64
enum: xsk-flags
-
+ name: io-uring-provider-info
+ attributes: []
+ -
name: page-pool
attributes:
-
@@ -171,6 +174,11 @@ attribute-sets:
name: dmabuf
doc: ID of the dmabuf this page-pool is attached to.
type: u32
+ -
+ name: io-uring
+ doc: io-uring memory provider information.
+ type: nest
+ nested-attributes: io-uring-provider-info
-
name: page-pool-info
subset-of: page-pool
@@ -296,6 +304,11 @@ attribute-sets:
name: dmabuf
doc: ID of the dmabuf attached to this queue, if any.
type: u32
+ -
+ name: io-uring
+ doc: io_uring memory provider information.
+ type: nest
+ nested-attributes: io-uring-provider-info
-
name: qstats
@@ -572,6 +585,7 @@ operations:
- inflight-mem
- detach-time
- dmabuf
+ - io-uring
dump:
reply: *pp-reply
config-cond: page-pool
@@ -637,6 +651,7 @@ operations:
- napi-id
- ifindex
- dmabuf
+ - io-uring
dump:
request:
attributes:
diff --git a/include/net/netmem.h b/include/net/netmem.h
index 1b58faa4f20f..c61d5b21e7b4 100644
--- a/include/net/netmem.h
+++ b/include/net/netmem.h
@@ -24,11 +24,20 @@ struct net_iov {
unsigned long __unused_padding;
unsigned long pp_magic;
struct page_pool *pp;
- struct dmabuf_genpool_chunk_owner *owner;
+ struct net_iov_area *owner;
unsigned long dma_addr;
atomic_long_t pp_ref_count;
};
+struct net_iov_area {
+ /* Array of net_iovs for this area. */
+ struct net_iov *niovs;
+ size_t num_niovs;
+
+ /* Offset into the dma-buf where this chunk starts. */
+ unsigned long base_virtual;
+};
+
/* These fields in struct page are used by the page_pool and net stack:
*
* struct {
@@ -54,6 +63,16 @@ NET_IOV_ASSERT_OFFSET(dma_addr, dma_addr);
NET_IOV_ASSERT_OFFSET(pp_ref_count, pp_ref_count);
#undef NET_IOV_ASSERT_OFFSET
+static inline struct net_iov_area *net_iov_owner(const struct net_iov *niov)
+{
+ return niov->owner;
+}
+
+static inline unsigned int net_iov_idx(const struct net_iov *niov)
+{
+ return niov - net_iov_owner(niov)->niovs;
+}
+
/* netmem */
/**
diff --git a/include/net/page_pool/memory_provider.h b/include/net/page_pool/memory_provider.h
new file mode 100644
index 000000000000..b3e665897767
--- /dev/null
+++ b/include/net/page_pool/memory_provider.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_PAGE_POOL_MEMORY_PROVIDER_H
+#define _NET_PAGE_POOL_MEMORY_PROVIDER_H
+
+#include <net/netmem.h>
+#include <net/page_pool/types.h>
+
+struct netdev_rx_queue;
+struct sk_buff;
+
+struct memory_provider_ops {
+ netmem_ref (*alloc_netmems)(struct page_pool *pool, gfp_t gfp);
+ bool (*release_netmem)(struct page_pool *pool, netmem_ref netmem);
+ int (*init)(struct page_pool *pool);
+ void (*destroy)(struct page_pool *pool);
+ int (*nl_fill)(void *mp_priv, struct sk_buff *rsp,
+ struct netdev_rx_queue *rxq);
+ void (*uninstall)(void *mp_priv, struct netdev_rx_queue *rxq);
+};
+
+bool net_mp_niov_set_dma_addr(struct net_iov *niov, dma_addr_t addr);
+void net_mp_niov_set_page_pool(struct page_pool *pool, struct net_iov *niov);
+void net_mp_niov_clear_page_pool(struct net_iov *niov);
+
+int net_mp_open_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *p);
+void net_mp_close_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *old_p);
+
+/**
+ * net_mp_netmem_place_in_cache() - give a netmem to a page pool
+ * @pool: the page pool to place the netmem into
+ * @netmem: netmem to give
+ *
+ * Push an accounted netmem into the page pool's allocation cache. The caller
+ * must ensure that there is space in the cache. It should only be called off
+ * the mp_ops->alloc_netmems() path.
+ */
+static inline void net_mp_netmem_place_in_cache(struct page_pool *pool,
+ netmem_ref netmem)
+{
+ pool->alloc.cache[pool->alloc.count++] = netmem;
+}
+
+#endif
diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h
index 7f405672b089..36eb57d73abc 100644
--- a/include/net/page_pool/types.h
+++ b/include/net/page_pool/types.h
@@ -152,8 +152,11 @@ struct page_pool_stats {
*/
#define PAGE_POOL_FRAG_GROUP_ALIGN (4 * sizeof(long))
+struct memory_provider_ops;
+
struct pp_memory_provider_params {
void *mp_priv;
+ const struct memory_provider_ops *mp_ops;
};
struct page_pool {
@@ -216,6 +219,7 @@ struct page_pool {
struct ptr_ring ring;
void *mp_priv;
+ const struct memory_provider_ops *mp_ops;
#ifdef CONFIG_PAGE_POOL_STATS
/* recycle stats are per-cpu to avoid locking */
diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h
index e4be227d3ad6..6c6ee183802d 100644
--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h
@@ -87,6 +87,11 @@ enum {
};
enum {
+ __NETDEV_A_IO_URING_PROVIDER_INFO_MAX,
+ NETDEV_A_IO_URING_PROVIDER_INFO_MAX = (__NETDEV_A_IO_URING_PROVIDER_INFO_MAX - 1)
+};
+
+enum {
NETDEV_A_PAGE_POOL_ID = 1,
NETDEV_A_PAGE_POOL_IFINDEX,
NETDEV_A_PAGE_POOL_NAPI_ID,
@@ -94,6 +99,7 @@ enum {
NETDEV_A_PAGE_POOL_INFLIGHT_MEM,
NETDEV_A_PAGE_POOL_DETACH_TIME,
NETDEV_A_PAGE_POOL_DMABUF,
+ NETDEV_A_PAGE_POOL_IO_URING,
__NETDEV_A_PAGE_POOL_MAX,
NETDEV_A_PAGE_POOL_MAX = (__NETDEV_A_PAGE_POOL_MAX - 1)
@@ -136,6 +142,7 @@ enum {
NETDEV_A_QUEUE_TYPE,
NETDEV_A_QUEUE_NAPI_ID,
NETDEV_A_QUEUE_DMABUF,
+ NETDEV_A_QUEUE_IO_URING,
__NETDEV_A_QUEUE_MAX,
NETDEV_A_QUEUE_MAX = (__NETDEV_A_QUEUE_MAX - 1)
diff --git a/net/core/dev.c b/net/core/dev.c
index 520906e285eb..d5ab9a4b318e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -159,6 +159,7 @@
#include <net/netdev_rx_queue.h>
#include <net/page_pool/types.h>
#include <net/page_pool/helpers.h>
+#include <net/page_pool/memory_provider.h>
#include <net/rps.h>
#include <linux/phy_link_topology.h>
@@ -11745,6 +11746,19 @@ void unregister_netdevice_queue(struct net_device *dev, struct list_head *head)
}
EXPORT_SYMBOL(unregister_netdevice_queue);
+static void dev_memory_provider_uninstall(struct net_device *dev)
+{
+ unsigned int i;
+
+ for (i = 0; i < dev->real_num_rx_queues; i++) {
+ struct netdev_rx_queue *rxq = &dev->_rx[i];
+ struct pp_memory_provider_params *p = &rxq->mp_params;
+
+ if (p->mp_ops && p->mp_ops->uninstall)
+ p->mp_ops->uninstall(rxq->mp_params.mp_priv, rxq);
+ }
+}
+
void unregister_netdevice_many_notify(struct list_head *head,
u32 portid, const struct nlmsghdr *nlh)
{
@@ -11799,7 +11813,7 @@ void unregister_netdevice_many_notify(struct list_head *head,
dev_tcx_uninstall(dev);
dev_xdp_uninstall(dev);
bpf_dev_bound_netdev_unregister(dev);
- dev_dmabuf_uninstall(dev);
+ dev_memory_provider_uninstall(dev);
netdev_offload_xstats_disable_all(dev);
diff --git a/net/core/devmem.c b/net/core/devmem.c
index 3bba3f018df0..7c6e0b5b6acb 100644
--- a/net/core/devmem.c
+++ b/net/core/devmem.c
@@ -16,6 +16,7 @@
#include <net/netdev_queues.h>
#include <net/netdev_rx_queue.h>
#include <net/page_pool/helpers.h>
+#include <net/page_pool/memory_provider.h>
#include <trace/events/page_pool.h>
#include "devmem.h"
@@ -27,20 +28,28 @@
/* Protected by rtnl_lock() */
static DEFINE_XARRAY_FLAGS(net_devmem_dmabuf_bindings, XA_FLAGS_ALLOC1);
+static const struct memory_provider_ops dmabuf_devmem_ops;
+
+bool net_is_devmem_iov(struct net_iov *niov)
+{
+ return niov->pp->mp_ops == &dmabuf_devmem_ops;
+}
+
static void net_devmem_dmabuf_free_chunk_owner(struct gen_pool *genpool,
struct gen_pool_chunk *chunk,
void *not_used)
{
struct dmabuf_genpool_chunk_owner *owner = chunk->owner;
- kvfree(owner->niovs);
+ kvfree(owner->area.niovs);
kfree(owner);
}
static dma_addr_t net_devmem_get_dma_addr(const struct net_iov *niov)
{
- struct dmabuf_genpool_chunk_owner *owner = net_iov_owner(niov);
+ struct dmabuf_genpool_chunk_owner *owner;
+ owner = net_devmem_iov_to_chunk_owner(niov);
return owner->base_dma_addr +
((dma_addr_t)net_iov_idx(niov) << PAGE_SHIFT);
}
@@ -83,7 +92,7 @@ net_devmem_alloc_dmabuf(struct net_devmem_dmabuf_binding *binding)
offset = dma_addr - owner->base_dma_addr;
index = offset / PAGE_SIZE;
- niov = &owner->niovs[index];
+ niov = &owner->area.niovs[index];
niov->pp_magic = 0;
niov->pp = NULL;
@@ -94,7 +103,7 @@ net_devmem_alloc_dmabuf(struct net_devmem_dmabuf_binding *binding)
void net_devmem_free_dmabuf(struct net_iov *niov)
{
- struct net_devmem_dmabuf_binding *binding = net_iov_binding(niov);
+ struct net_devmem_dmabuf_binding *binding = net_devmem_iov_binding(niov);
unsigned long dma_addr = net_devmem_get_dma_addr(niov);
if (WARN_ON(!gen_pool_has_addr(binding->chunk_pool, dma_addr,
@@ -117,6 +126,7 @@ void net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding)
WARN_ON(rxq->mp_params.mp_priv != binding);
rxq->mp_params.mp_priv = NULL;
+ rxq->mp_params.mp_ops = NULL;
rxq_idx = get_netdev_rx_queue_index(rxq);
@@ -152,7 +162,7 @@ int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
}
rxq = __netif_get_rx_queue(dev, rxq_idx);
- if (rxq->mp_params.mp_priv) {
+ if (rxq->mp_params.mp_ops) {
NL_SET_ERR_MSG(extack, "designated queue already memory provider bound");
return -EEXIST;
}
@@ -170,6 +180,7 @@ int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
return err;
rxq->mp_params.mp_priv = binding;
+ rxq->mp_params.mp_ops = &dmabuf_devmem_ops;
err = netdev_rx_queue_restart(dev, rxq_idx);
if (err)
@@ -179,6 +190,7 @@ int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
err_xa_erase:
rxq->mp_params.mp_priv = NULL;
+ rxq->mp_params.mp_ops = NULL;
xa_erase(&binding->bound_rxqs, xa_idx);
return err;
@@ -261,9 +273,9 @@ net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd,
goto err_free_chunks;
}
- owner->base_virtual = virtual;
+ owner->area.base_virtual = virtual;
owner->base_dma_addr = dma_addr;
- owner->num_niovs = len / PAGE_SIZE;
+ owner->area.num_niovs = len / PAGE_SIZE;
owner->binding = binding;
err = gen_pool_add_owner(binding->chunk_pool, dma_addr,
@@ -275,17 +287,17 @@ net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd,
goto err_free_chunks;
}
- owner->niovs = kvmalloc_array(owner->num_niovs,
- sizeof(*owner->niovs),
- GFP_KERNEL);
- if (!owner->niovs) {
+ owner->area.niovs = kvmalloc_array(owner->area.num_niovs,
+ sizeof(*owner->area.niovs),
+ GFP_KERNEL);
+ if (!owner->area.niovs) {
err = -ENOMEM;
goto err_free_chunks;
}
- for (i = 0; i < owner->num_niovs; i++) {
- niov = &owner->niovs[i];
- niov->owner = owner;
+ for (i = 0; i < owner->area.num_niovs; i++) {
+ niov = &owner->area.niovs[i];
+ niov->owner = &owner->area;
page_pool_set_dma_addr_netmem(net_iov_to_netmem(niov),
net_devmem_get_dma_addr(niov));
}
@@ -313,26 +325,6 @@ err_put_dmabuf:
return ERR_PTR(err);
}
-void dev_dmabuf_uninstall(struct net_device *dev)
-{
- struct net_devmem_dmabuf_binding *binding;
- struct netdev_rx_queue *rxq;
- unsigned long xa_idx;
- unsigned int i;
-
- for (i = 0; i < dev->real_num_rx_queues; i++) {
- binding = dev->_rx[i].mp_params.mp_priv;
- if (!binding)
- continue;
-
- xa_for_each(&binding->bound_rxqs, xa_idx, rxq)
- if (rxq == &dev->_rx[i]) {
- xa_erase(&binding->bound_rxqs, xa_idx);
- break;
- }
- }
-}
-
/*** "Dmabuf devmem memory provider" ***/
int mp_dmabuf_devmem_init(struct page_pool *pool)
@@ -398,3 +390,36 @@ bool mp_dmabuf_devmem_release_page(struct page_pool *pool, netmem_ref netmem)
/* We don't want the page pool put_page()ing our net_iovs. */
return false;
}
+
+static int mp_dmabuf_devmem_nl_fill(void *mp_priv, struct sk_buff *rsp,
+ struct netdev_rx_queue *rxq)
+{
+ const struct net_devmem_dmabuf_binding *binding = mp_priv;
+ int type = rxq ? NETDEV_A_QUEUE_DMABUF : NETDEV_A_PAGE_POOL_DMABUF;
+
+ return nla_put_u32(rsp, type, binding->id);
+}
+
+static void mp_dmabuf_devmem_uninstall(void *mp_priv,
+ struct netdev_rx_queue *rxq)
+{
+ struct net_devmem_dmabuf_binding *binding = mp_priv;
+ struct netdev_rx_queue *bound_rxq;
+ unsigned long xa_idx;
+
+ xa_for_each(&binding->bound_rxqs, xa_idx, bound_rxq) {
+ if (bound_rxq == rxq) {
+ xa_erase(&binding->bound_rxqs, xa_idx);
+ break;
+ }
+ }
+}
+
+static const struct memory_provider_ops dmabuf_devmem_ops = {
+ .init = mp_dmabuf_devmem_init,
+ .destroy = mp_dmabuf_devmem_destroy,
+ .alloc_netmems = mp_dmabuf_devmem_alloc_netmems,
+ .release_netmem = mp_dmabuf_devmem_release_page,
+ .nl_fill = mp_dmabuf_devmem_nl_fill,
+ .uninstall = mp_dmabuf_devmem_uninstall,
+};
diff --git a/net/core/devmem.h b/net/core/devmem.h
index 76099ef9c482..7fc158d52729 100644
--- a/net/core/devmem.h
+++ b/net/core/devmem.h
@@ -10,6 +10,8 @@
#ifndef _NET_DEVMEM_H
#define _NET_DEVMEM_H
+#include <net/netmem.h>
+
struct netlink_ext_ack;
struct net_devmem_dmabuf_binding {
@@ -51,17 +53,11 @@ struct net_devmem_dmabuf_binding {
* allocations from this chunk.
*/
struct dmabuf_genpool_chunk_owner {
- /* Offset into the dma-buf where this chunk starts. */
- unsigned long base_virtual;
+ struct net_iov_area area;
+ struct net_devmem_dmabuf_binding *binding;
/* dma_addr of the start of the chunk. */
dma_addr_t base_dma_addr;
-
- /* Array of net_iovs for this chunk. */
- struct net_iov *niovs;
- size_t num_niovs;
-
- struct net_devmem_dmabuf_binding *binding;
};
void __net_devmem_dmabuf_binding_free(struct net_devmem_dmabuf_binding *binding);
@@ -72,38 +68,34 @@ void net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding);
int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
struct net_devmem_dmabuf_binding *binding,
struct netlink_ext_ack *extack);
-void dev_dmabuf_uninstall(struct net_device *dev);
static inline struct dmabuf_genpool_chunk_owner *
-net_iov_owner(const struct net_iov *niov)
+net_devmem_iov_to_chunk_owner(const struct net_iov *niov)
{
- return niov->owner;
+ struct net_iov_area *owner = net_iov_owner(niov);
+
+ return container_of(owner, struct dmabuf_genpool_chunk_owner, area);
}
-static inline unsigned int net_iov_idx(const struct net_iov *niov)
+static inline struct net_devmem_dmabuf_binding *
+net_devmem_iov_binding(const struct net_iov *niov)
{
- return niov - net_iov_owner(niov)->niovs;
+ return net_devmem_iov_to_chunk_owner(niov)->binding;
}
-static inline struct net_devmem_dmabuf_binding *
-net_iov_binding(const struct net_iov *niov)
+static inline u32 net_devmem_iov_binding_id(const struct net_iov *niov)
{
- return net_iov_owner(niov)->binding;
+ return net_devmem_iov_binding(niov)->id;
}
static inline unsigned long net_iov_virtual_addr(const struct net_iov *niov)
{
- struct dmabuf_genpool_chunk_owner *owner = net_iov_owner(niov);
+ struct net_iov_area *owner = net_iov_owner(niov);
return owner->base_virtual +
((unsigned long)net_iov_idx(niov) << PAGE_SHIFT);
}
-static inline u32 net_iov_binding_id(const struct net_iov *niov)
-{
- return net_iov_owner(niov)->binding->id;
-}
-
static inline void
net_devmem_dmabuf_binding_get(struct net_devmem_dmabuf_binding *binding)
{
@@ -123,6 +115,8 @@ struct net_iov *
net_devmem_alloc_dmabuf(struct net_devmem_dmabuf_binding *binding);
void net_devmem_free_dmabuf(struct net_iov *ppiov);
+bool net_is_devmem_iov(struct net_iov *niov);
+
#else
struct net_devmem_dmabuf_binding;
@@ -152,10 +146,6 @@ net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
return -EOPNOTSUPP;
}
-static inline void dev_dmabuf_uninstall(struct net_device *dev)
-{
-}
-
static inline struct net_iov *
net_devmem_alloc_dmabuf(struct net_devmem_dmabuf_binding *binding)
{
@@ -171,10 +161,15 @@ static inline unsigned long net_iov_virtual_addr(const struct net_iov *niov)
return 0;
}
-static inline u32 net_iov_binding_id(const struct net_iov *niov)
+static inline u32 net_devmem_iov_binding_id(const struct net_iov *niov)
{
return 0;
}
+
+static inline bool net_is_devmem_iov(struct net_iov *niov)
+{
+ return false;
+}
#endif
#endif /* _NET_DEVMEM_H */
diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c
index 715f85c6b62e..5b459b4fef46 100644
--- a/net/core/netdev-genl.c
+++ b/net/core/netdev-genl.c
@@ -10,6 +10,7 @@
#include <net/sock.h>
#include <net/xdp.h>
#include <net/xdp_sock.h>
+#include <net/page_pool/memory_provider.h>
#include "dev.h"
#include "devmem.h"
@@ -368,7 +369,7 @@ static int
netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev,
u32 q_idx, u32 q_type, const struct genl_info *info)
{
- struct net_devmem_dmabuf_binding *binding;
+ struct pp_memory_provider_params *params;
struct netdev_rx_queue *rxq;
struct netdev_queue *txq;
void *hdr;
@@ -385,15 +386,15 @@ netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev,
switch (q_type) {
case NETDEV_QUEUE_TYPE_RX:
rxq = __netif_get_rx_queue(netdev, q_idx);
+
if (rxq->napi && nla_put_u32(rsp, NETDEV_A_QUEUE_NAPI_ID,
rxq->napi->napi_id))
goto nla_put_failure;
- binding = rxq->mp_params.mp_priv;
- if (binding &&
- nla_put_u32(rsp, NETDEV_A_QUEUE_DMABUF, binding->id))
+ params = &rxq->mp_params;
+ if (params->mp_ops &&
+ params->mp_ops->nl_fill(params->mp_priv, rsp, rxq))
goto nla_put_failure;
-
break;
case NETDEV_QUEUE_TYPE_TX:
txq = netdev_get_tx_queue(netdev, q_idx);
diff --git a/net/core/netdev_rx_queue.c b/net/core/netdev_rx_queue.c
index db82786fa0c4..db46880f37cc 100644
--- a/net/core/netdev_rx_queue.c
+++ b/net/core/netdev_rx_queue.c
@@ -3,6 +3,7 @@
#include <linux/netdevice.h>
#include <net/netdev_queues.h>
#include <net/netdev_rx_queue.h>
+#include <net/page_pool/memory_provider.h>
#include "page_pool_priv.h"
@@ -80,3 +81,71 @@ err_free_new_mem:
return err;
}
EXPORT_SYMBOL_NS_GPL(netdev_rx_queue_restart, "NETDEV_INTERNAL");
+
+static int __net_mp_open_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *p)
+{
+ struct netdev_rx_queue *rxq;
+ int ret;
+
+ if (ifq_idx >= dev->real_num_rx_queues)
+ return -EINVAL;
+ ifq_idx = array_index_nospec(ifq_idx, dev->real_num_rx_queues);
+
+ rxq = __netif_get_rx_queue(dev, ifq_idx);
+ if (rxq->mp_params.mp_ops)
+ return -EEXIST;
+
+ rxq->mp_params = *p;
+ ret = netdev_rx_queue_restart(dev, ifq_idx);
+ if (ret) {
+ rxq->mp_params.mp_ops = NULL;
+ rxq->mp_params.mp_priv = NULL;
+ }
+ return ret;
+}
+
+int net_mp_open_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *p)
+{
+ int ret;
+
+ rtnl_lock();
+ ret = __net_mp_open_rxq(dev, ifq_idx, p);
+ rtnl_unlock();
+ return ret;
+}
+
+static void __net_mp_close_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *old_p)
+{
+ struct netdev_rx_queue *rxq;
+
+ if (WARN_ON_ONCE(ifq_idx >= dev->real_num_rx_queues))
+ return;
+
+ rxq = __netif_get_rx_queue(dev, ifq_idx);
+
+ /* Callers holding a netdev ref may get here after we already
+ * went thru shutdown via dev_memory_provider_uninstall().
+ */
+ if (dev->reg_state > NETREG_REGISTERED &&
+ !rxq->mp_params.mp_ops)
+ return;
+
+ if (WARN_ON_ONCE(rxq->mp_params.mp_ops != old_p->mp_ops ||
+ rxq->mp_params.mp_priv != old_p->mp_priv))
+ return;
+
+ rxq->mp_params.mp_ops = NULL;
+ rxq->mp_params.mp_priv = NULL;
+ WARN_ON(netdev_rx_queue_restart(dev, ifq_idx));
+}
+
+void net_mp_close_rxq(struct net_device *dev, unsigned ifq_idx,
+ struct pp_memory_provider_params *old_p)
+{
+ rtnl_lock();
+ __net_mp_close_rxq(dev, ifq_idx, old_p);
+ rtnl_unlock();
+}
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index f5e908c9e7ad..686bd4a117d9 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -13,6 +13,7 @@
#include <net/netdev_rx_queue.h>
#include <net/page_pool/helpers.h>
+#include <net/page_pool/memory_provider.h>
#include <net/xdp.h>
#include <linux/dma-direction.h>
@@ -285,13 +286,19 @@ static int page_pool_init(struct page_pool *pool,
rxq = __netif_get_rx_queue(pool->slow.netdev,
pool->slow.queue_idx);
pool->mp_priv = rxq->mp_params.mp_priv;
+ pool->mp_ops = rxq->mp_params.mp_ops;
}
- if (pool->mp_priv) {
+ if (pool->mp_ops) {
if (!pool->dma_map || !pool->dma_sync)
return -EOPNOTSUPP;
- err = mp_dmabuf_devmem_init(pool);
+ if (WARN_ON(!is_kernel_rodata((unsigned long)pool->mp_ops))) {
+ err = -EFAULT;
+ goto free_ptr_ring;
+ }
+
+ err = pool->mp_ops->init(pool);
if (err) {
pr_warn("%s() mem-provider init failed %d\n", __func__,
err);
@@ -587,8 +594,8 @@ netmem_ref page_pool_alloc_netmems(struct page_pool *pool, gfp_t gfp)
return netmem;
/* Slow-path: cache empty, do real allocation */
- if (static_branch_unlikely(&page_pool_mem_providers) && pool->mp_priv)
- netmem = mp_dmabuf_devmem_alloc_netmems(pool, gfp);
+ if (static_branch_unlikely(&page_pool_mem_providers) && pool->mp_ops)
+ netmem = pool->mp_ops->alloc_netmems(pool, gfp);
else
netmem = __page_pool_alloc_pages_slow(pool, gfp);
return netmem;
@@ -679,8 +686,8 @@ void page_pool_return_page(struct page_pool *pool, netmem_ref netmem)
bool put;
put = true;
- if (static_branch_unlikely(&page_pool_mem_providers) && pool->mp_priv)
- put = mp_dmabuf_devmem_release_page(pool, netmem);
+ if (static_branch_unlikely(&page_pool_mem_providers) && pool->mp_ops)
+ put = pool->mp_ops->release_netmem(pool, netmem);
else
__page_pool_release_page_dma(pool, netmem);
@@ -1048,8 +1055,8 @@ static void __page_pool_destroy(struct page_pool *pool)
page_pool_unlist(pool);
page_pool_uninit(pool);
- if (pool->mp_priv) {
- mp_dmabuf_devmem_destroy(pool);
+ if (pool->mp_ops) {
+ pool->mp_ops->destroy(pool);
static_branch_dec(&page_pool_mem_providers);
}
@@ -1190,3 +1197,31 @@ void page_pool_update_nid(struct page_pool *pool, int new_nid)
}
}
EXPORT_SYMBOL(page_pool_update_nid);
+
+bool net_mp_niov_set_dma_addr(struct net_iov *niov, dma_addr_t addr)
+{
+ return page_pool_set_dma_addr_netmem(net_iov_to_netmem(niov), addr);
+}
+
+/* Associate a niov with a page pool. Should follow with a matching
+ * net_mp_niov_clear_page_pool()
+ */
+void net_mp_niov_set_page_pool(struct page_pool *pool, struct net_iov *niov)
+{
+ netmem_ref netmem = net_iov_to_netmem(niov);
+
+ page_pool_set_pp_info(pool, netmem);
+
+ pool->pages_state_hold_cnt++;
+ trace_page_pool_state_hold(pool, netmem, pool->pages_state_hold_cnt);
+}
+
+/* Disassociate a niov from a page pool. Should only be used in the
+ * ->release_netmem() path.
+ */
+void net_mp_niov_clear_page_pool(struct net_iov *niov)
+{
+ netmem_ref netmem = net_iov_to_netmem(niov);
+
+ page_pool_clear_pp_info(netmem);
+}
diff --git a/net/core/page_pool_user.c b/net/core/page_pool_user.c
index 6677e0c2e256..9d8a3d8597fa 100644
--- a/net/core/page_pool_user.c
+++ b/net/core/page_pool_user.c
@@ -8,9 +8,9 @@
#include <net/netdev_rx_queue.h>
#include <net/page_pool/helpers.h>
#include <net/page_pool/types.h>
+#include <net/page_pool/memory_provider.h>
#include <net/sock.h>
-#include "devmem.h"
#include "page_pool_priv.h"
#include "netdev-genl-gen.h"
@@ -216,7 +216,6 @@ static int
page_pool_nl_fill(struct sk_buff *rsp, const struct page_pool *pool,
const struct genl_info *info)
{
- struct net_devmem_dmabuf_binding *binding = pool->mp_priv;
size_t inflight, refsz;
unsigned int napi_id;
void *hdr;
@@ -249,7 +248,7 @@ page_pool_nl_fill(struct sk_buff *rsp, const struct page_pool *pool,
pool->user.detach_time))
goto err_cancel;
- if (binding && nla_put_u32(rsp, NETDEV_A_PAGE_POOL_DMABUF, binding->id))
+ if (pool->mp_ops && pool->mp_ops->nl_fill(pool->mp_priv, rsp, NULL))
goto err_cancel;
genlmsg_end(rsp, hdr);
@@ -356,7 +355,7 @@ void page_pool_unlist(struct page_pool *pool)
int page_pool_check_memory_provider(struct net_device *dev,
struct netdev_rx_queue *rxq)
{
- struct net_devmem_dmabuf_binding *binding = rxq->mp_params.mp_priv;
+ void *binding = rxq->mp_params.mp_priv;
struct page_pool *pool;
struct hlist_node *n;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 0d704bda6c41..7f43d31c9400 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2476,6 +2476,11 @@ static int tcp_recvmsg_dmabuf(struct sock *sk, const struct sk_buff *skb,
}
niov = skb_frag_net_iov(frag);
+ if (!net_is_devmem_iov(niov)) {
+ err = -ENODEV;
+ goto out;
+ }
+
end = start + skb_frag_size(frag);
copy = end - offset;
@@ -2494,7 +2499,7 @@ static int tcp_recvmsg_dmabuf(struct sock *sk, const struct sk_buff *skb,
/* Will perform the exchange later */
dmabuf_cmsg.frag_token = tcp_xa_pool.tokens[tcp_xa_pool.idx];
- dmabuf_cmsg.dmabuf_id = net_iov_binding_id(niov);
+ dmabuf_cmsg.dmabuf_id = net_devmem_iov_binding_id(niov);
offset += copy;
remaining_len -= copy;
diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h
index e4be227d3ad6..6c6ee183802d 100644
--- a/tools/include/uapi/linux/netdev.h
+++ b/tools/include/uapi/linux/netdev.h
@@ -87,6 +87,11 @@ enum {
};
enum {
+ __NETDEV_A_IO_URING_PROVIDER_INFO_MAX,
+ NETDEV_A_IO_URING_PROVIDER_INFO_MAX = (__NETDEV_A_IO_URING_PROVIDER_INFO_MAX - 1)
+};
+
+enum {
NETDEV_A_PAGE_POOL_ID = 1,
NETDEV_A_PAGE_POOL_IFINDEX,
NETDEV_A_PAGE_POOL_NAPI_ID,
@@ -94,6 +99,7 @@ enum {
NETDEV_A_PAGE_POOL_INFLIGHT_MEM,
NETDEV_A_PAGE_POOL_DETACH_TIME,
NETDEV_A_PAGE_POOL_DMABUF,
+ NETDEV_A_PAGE_POOL_IO_URING,
__NETDEV_A_PAGE_POOL_MAX,
NETDEV_A_PAGE_POOL_MAX = (__NETDEV_A_PAGE_POOL_MAX - 1)
@@ -136,6 +142,7 @@ enum {
NETDEV_A_QUEUE_TYPE,
NETDEV_A_QUEUE_NAPI_ID,
NETDEV_A_QUEUE_DMABUF,
+ NETDEV_A_QUEUE_IO_URING,
__NETDEV_A_QUEUE_MAX,
NETDEV_A_QUEUE_MAX = (__NETDEV_A_QUEUE_MAX - 1)
generated by cgit (git 2.34.1) at 2025-06-03 20:31:25 +0000