On Tue, Feb 13, 2024 at 5:24 AM Pavel Begunkov asml.silence@gmail.com wrote:
On 12/18/23 02:40, Mina Almasry wrote:
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 willemb@google.com Signed-off-by: Kaiyuan Zhang kaiyuanz@google.com Signed-off-by: Mina Almasry almasrymina@google.com
v1:
- Rename devmem -> dmabuf (David).
include/net/devmem.h | 12 ++++++++++++ include/net/netmem.h | 26 ++++++++++++++++++++++++++ net/core/dev.c | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+)
...
diff --git a/include/net/netmem.h b/include/net/netmem.h index 45eb42d9990b..7fce2efc8707 100644 --- a/include/net/netmem.h +++ b/include/net/netmem.h @@ -14,8 +14,34 @@
struct net_iov { struct dmabuf_genpool_chunk_owner *owner;
unsigned long dma_addr;+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 dma_addr_t net_iov_dma_addr(const struct net_iov *niov) +{
struct dmabuf_genpool_chunk_owner *owner = net_iov_owner(niov);return owner->base_dma_addr +((dma_addr_t)net_iov_idx(niov) << PAGE_SHIFT);Looks like it should have been niov->dma_addr
Yes, indeed. Thanks for catching.
+}
+static inline struct netdev_dmabuf_binding * +net_iov_binding(const struct net_iov *niov) +{
return net_iov_owner(niov)->binding;+}
/* netmem */
struct netmem {
...
-- Pavel Begunkov