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| author | Mina Almasry <[email protected]> | 2024-09-10 17:14:48 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2024-09-12 03:44:31 +0000 |
| commit | 28c5c74eeaa0a2aad8b9cd9ede22a4c623f2a7fc (patch) | |
| tree | 85d3db22839b9c4e256d4a87bacdc610da9ed655 /net/core/devmem.h | |
| parent | netdev: support binding dma-buf to netdevice (diff) | |
| download | kernel-28c5c74eeaa0a2aad8b9cd9ede22a4c623f2a7fc.tar.gz kernel-28c5c74eeaa0a2aad8b9cd9ede22a4c623f2a7fc.zip | |
netdev: netdevice devmem allocator
Implement netdev devmem allocator. The allocator takes a given struct
netdev_dmabuf_binding as input and allocates net_iov from that
binding.
The allocation simply delegates to the binding's genpool for the
allocation logic and wraps the returned memory region in a net_iov
struct.
Signed-off-by: Willem de Bruijn <[email protected]>
Signed-off-by: Kaiyuan Zhang <[email protected]>
Signed-off-by: Mina Almasry <[email protected]>
Reviewed-by: Pavel Begunkov <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'net/core/devmem.h')
| -rw-r--r-- | net/core/devmem.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/core/devmem.h b/net/core/devmem.h index c50f91d858dd..b1db4877cff9 100644 --- a/net/core/devmem.h +++ b/net/core/devmem.h @@ -74,6 +74,23 @@ int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx, 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) +{ + return niov->owner; +} + +static inline unsigned int net_iov_idx(const struct net_iov *niov) +{ + return niov - net_iov_owner(niov)->niovs; +} + +static inline struct net_devmem_dmabuf_binding * +net_iov_binding(const struct net_iov *niov) +{ + return net_iov_owner(niov)->binding; +} + static inline void net_devmem_dmabuf_binding_get(struct net_devmem_dmabuf_binding *binding) { @@ -89,7 +106,13 @@ net_devmem_dmabuf_binding_put(struct net_devmem_dmabuf_binding *binding) __net_devmem_dmabuf_binding_free(binding); } +struct net_iov * +net_devmem_alloc_dmabuf(struct net_devmem_dmabuf_binding *binding); +void net_devmem_free_dmabuf(struct net_iov *ppiov); + #else +struct net_devmem_dmabuf_binding; + static inline void __net_devmem_dmabuf_binding_free(struct net_devmem_dmabuf_binding *binding) { @@ -119,6 +142,17 @@ net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx, 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) +{ + return NULL; +} + +static inline void net_devmem_free_dmabuf(struct net_iov *ppiov) +{ +} + #endif #endif /* _NET_DEVMEM_H */ |