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sfc: Introduce and use MCDI_CTL_SDU_LEN_MAX_V1 macro for Siena-specific code

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The MCDI version 2 protocol supports larger payloads, but will
not be implemented on Siena.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-08-20 15:47:12 +01:00
parent a649dfcb48
commit d0c2ee99e5
2 changed files with 7 additions and 4 deletions
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4
drivers/net/ethernet/sfc/mcdi_pcol.h
View File

@ -100,7 +100,9 @@
#define MCDI_HEADER_XFLAGS_EVREQ 0x01
/* Maximum number of payload bytes */
#define MCDI_CTL_SDU_LEN_MAX 0xfc
#define MCDI_CTL_SDU_LEN_MAX_V1 0xfc
#define MCDI_CTL_SDU_LEN_MAX MCDI_CTL_SDU_LEN_MAX_V1
/* The MC can generate events for two reasons:
* - To complete a shared memory request if XFLAGS_EVREQ was set

7
drivers/net/ethernet/sfc/siena_sriov.c
View File

@ -248,11 +248,11 @@ static int efx_sriov_memcpy(struct efx_nic *efx, struct efx_memcpy_req *req,
mb(); /* Finish writing source/reading dest before DMA starts */
used = MC_CMD_MEMCPY_IN_LEN(count);
if (WARN_ON(used > MCDI_CTL_SDU_LEN_MAX))
if (WARN_ON(used > MCDI_CTL_SDU_LEN_MAX_V1))
return -ENOBUFS;
/* Allocate room for the largest request */
inbuf = kzalloc(MCDI_CTL_SDU_LEN_MAX, GFP_KERNEL);
inbuf = kzalloc(MCDI_CTL_SDU_LEN_MAX_V1, GFP_KERNEL);
if (inbuf == NULL)
return -ENOMEM;
@ -270,7 +270,8 @@ static int efx_sriov_memcpy(struct efx_nic *efx, struct efx_memcpy_req *req,
from_lo = (u32)req->from_addr;
from_hi = (u32)(req->from_addr >> 32);
} else {
if (WARN_ON(used + req->length > MCDI_CTL_SDU_LEN_MAX)) {
if (WARN_ON(used + req->length >
MCDI_CTL_SDU_LEN_MAX_V1)) {
rc = -ENOBUFS;
goto out;
}