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smb: smbdirect: introduce smbdirect_connection_{alloc,free}_send_io()

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These are more or less copies of smb_direct_{alloc,free}_sendmsg()
in the server.

The only difference is that we use ib_dma_unmap_page() for all sges,
this simplifies the logic and doesn't matter as
ib_dma_unmap_single() and ib_dma_unmap_page() both operate
on dma_addr_t and dma_unmap_single_attrs() is just an
alias for dma_unmap_page_attrs().
We already have in inconsistency like that in the client
code where we use ib_dma_unmap_single(), while we mapped
using ib_dma_map_page().

The new functions will replace the existing once in the next commits and
will also be used in the client.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Stefan Metzmacher 2025-09-11 19:49:18 +02:00 committed by Steve French
parent 64d6bd2533
commit 8fde196338
1 changed files with 47 additions and 0 deletions
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47
fs/smb/common/smbdirect/smbdirect_connection.c
View File

@ -6,6 +6,53 @@
#include "smbdirect_internal.h"
__maybe_unused /* this is temporary while this file is included in others */
static struct smbdirect_send_io *smbdirect_connection_alloc_send_io(struct smbdirect_socket *sc)
{
struct smbdirect_send_io *msg;
msg = mempool_alloc(sc->send_io.mem.pool, sc->send_io.mem.gfp_mask);
if (!msg)
return ERR_PTR(-ENOMEM);
msg->socket = sc;
INIT_LIST_HEAD(&msg->sibling_list);
msg->num_sge = 0;
return msg;
}
__maybe_unused /* this is temporary while this file is included in others */
static void smbdirect_connection_free_send_io(struct smbdirect_send_io *msg)
{
struct smbdirect_socket *sc = msg->socket;
size_t i;
/*
* The list needs to be empty!
* The caller should take care of it.
*/
WARN_ON_ONCE(!list_empty(&msg->sibling_list));
/*
* Note we call ib_dma_unmap_page(), even if some sges are mapped using
* ib_dma_map_single().
*
* The difference between _single() and _page() only matters for the
* ib_dma_map_*() case.
*
* For the ib_dma_unmap_*() case it does not matter as both take the
* dma_addr_t and dma_unmap_single_attrs() is just an alias to
* dma_unmap_page_attrs().
*/
for (i = 0; i < msg->num_sge; i++)
ib_dma_unmap_page(sc->ib.dev,
msg->sge[i].addr,
msg->sge[i].length,
DMA_TO_DEVICE);
mempool_free(msg, sc->send_io.mem.pool);
}
__maybe_unused /* this is temporary while this file is included in others */
static struct smbdirect_recv_io *smbdirect_connection_get_recv_io(struct smbdirect_socket *sc)
{