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@xxxxxxxxxx>
Signed-off-by: Kaiyuan Zhang <kaiyuanz@xxxxxxxxxx>
Signed-off-by: Mina Almasry <almasrymina@xxxxxxxxxx>
---
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
+}
+
+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
