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IB/srp: Introduce srp_finish_mapping() 

This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Bart Van Assche 2014-05-20 15:05:46 +02:00 committed by Roland Dreier
parent 76bc1e1ddd
commit 539dde6fc5
1 changed files with 27 additions and 15 deletions
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42
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -935,16 +935,6 @@ static int srp_map_finish_fmr(struct srp_map_state *state,
struct ib_pool_fmr *fmr;
u64 io_addr = 0;
if (!state->npages)
return 0;
if (state->npages == 1) {
srp_map_desc(state, state->base_dma_addr, state->fmr_len,
target->rkey);
state->npages = state->fmr_len = 0;
return 0;
}
fmr = ib_fmr_pool_map_phys(dev->fmr_pool, state->pages,
state->npages, io_addr);
if (IS_ERR(fmr))
@ -954,10 +944,32 @@ static int srp_map_finish_fmr(struct srp_map_state *state,
state->nfmr++;
srp_map_desc(state, 0, state->fmr_len, fmr->fmr->rkey);
state->npages = state->fmr_len = 0;
return 0;
}
static int srp_finish_mapping(struct srp_map_state *state,
struct srp_target_port *target)
{
int ret = 0;
if (state->npages == 0)
return 0;
if (state->npages == 1)
srp_map_desc(state, state->base_dma_addr, state->fmr_len,
target->rkey);
else
ret = srp_map_finish_fmr(state, target);
if (ret == 0) {
state->npages = 0;
state->fmr_len = 0;
}
return ret;
}
static void srp_map_update_start(struct srp_map_state *state,
struct scatterlist *sg, int sg_index,
dma_addr_t dma_addr)
@ -998,7 +1010,7 @@ static int srp_map_sg_entry(struct srp_map_state *state,
* avoided using FMR on such page fragments.
*/
if (dma_addr & ~dev->fmr_page_mask || dma_len > dev->fmr_max_size) {
ret = srp_map_finish_fmr(state, target);
ret = srp_finish_mapping(state, target);
if (ret)
return ret;
@ -1017,7 +1029,7 @@ static int srp_map_sg_entry(struct srp_map_state *state,
while (dma_len) {
if (state->npages == SRP_FMR_SIZE) {
ret = srp_map_finish_fmr(state, target);
ret = srp_finish_mapping(state, target);
if (ret)
return ret;
@ -1040,7 +1052,7 @@ static int srp_map_sg_entry(struct srp_map_state *state,
*/
ret = 0;
if (len != dev->fmr_page_size) {
ret = srp_map_finish_fmr(state, target);
ret = srp_finish_mapping(state, target);
if (!ret)
srp_map_update_start(state, NULL, 0, 0);
}
@ -1083,7 +1095,7 @@ backtrack:
}
}
if (use_fmr == SRP_MAP_ALLOW_FMR && srp_map_finish_fmr(state, target))
if (use_fmr == SRP_MAP_ALLOW_FMR && srp_finish_mapping(state, target))
goto backtrack;
req->nfmr = state->nfmr;