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IB/srp: Introduce srp_device.use_fmr

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Introduce the variable srp_device.use_fmr. Leave out the dev->has_fr /
dev->has_fmr and ch->fr_pool / ch->fmr_pool checks since these are
redundant. This patch does not change any functionality but makes the
source code easier to read.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2015-08-10 17:08:44 -07:00 committed by Doug Ledford
parent 3ae95da883
commit 002f15674c
2 changed files with 12 additions and 11 deletions
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22
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -546,7 +546,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch)
if (ret)
goto err_qp;
if (dev->use_fast_reg && dev->has_fr) {
if (dev->use_fast_reg) {
fr_pool = srp_alloc_fr_pool(target);
if (IS_ERR(fr_pool)) {
ret = PTR_ERR(fr_pool);
@ -557,7 +557,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch)
if (ch->fr_pool)
srp_destroy_fr_pool(ch->fr_pool);
ch->fr_pool = fr_pool;
} else if (!dev->use_fast_reg && dev->has_fmr) {
} else if (dev->use_fmr) {
fmr_pool = srp_alloc_fmr_pool(target);
if (IS_ERR(fmr_pool)) {
ret = PTR_ERR(fmr_pool);
@ -623,7 +623,7 @@ static void srp_free_ch_ib(struct srp_target_port *target,
if (dev->use_fast_reg) {
if (ch->fr_pool)
srp_destroy_fr_pool(ch->fr_pool);
} else {
} else if (dev->use_fmr) {
if (ch->fmr_pool)
ib_destroy_fmr_pool(ch->fmr_pool);
}
@ -1085,7 +1085,7 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
if (req->nmdesc)
srp_fr_pool_put(ch->fr_pool, req->fr_list,
req->nmdesc);
} else {
} else if (dev->use_fmr) {
struct ib_pool_fmr **pfmr;
for (i = req->nmdesc, pfmr = req->fmr_list; i > 0; i--, pfmr++)
@ -1345,8 +1345,11 @@ static int srp_finish_mapping(struct srp_map_state *state,
struct srp_rdma_ch *ch)
{
struct srp_target_port *target = ch->target;
struct srp_device *dev = target->srp_host->srp_dev;
int ret = 0;
WARN_ON_ONCE(!dev->use_fast_reg && !dev->use_fmr);
if (state->npages == 0)
return 0;
@ -1354,8 +1357,7 @@ static int srp_finish_mapping(struct srp_map_state *state,
srp_map_desc(state, state->base_dma_addr, state->dma_len,
target->rkey);
else
ret = target->srp_host->srp_dev->use_fast_reg ?
srp_map_finish_fr(state, ch) :
ret = dev->use_fast_reg ? srp_map_finish_fr(state, ch) :
srp_map_finish_fmr(state, ch);
if (ret == 0) {
@ -1417,21 +1419,18 @@ static int srp_map_sg(struct srp_map_state *state, struct srp_rdma_ch *ch,
struct srp_device *dev = target->srp_host->srp_dev;
struct scatterlist *sg;
int i, ret;
bool use_mr;
state->desc = req->indirect_desc;
state->pages = req->map_page;
if (dev->use_fast_reg) {
state->fr.next = req->fr_list;
state->fr.end = req->fr_list + target->cmd_sg_cnt;
use_mr = !!ch->fr_pool;
} else {
} else if (dev->use_fmr) {
state->fmr.next = req->fmr_list;
state->fmr.end = req->fmr_list + target->cmd_sg_cnt;
use_mr = !!ch->fmr_pool;
}
if (use_mr) {
if (dev->use_fast_reg || dev->use_fmr) {
for_each_sg(scat, sg, count, i) {
ret = srp_map_sg_entry(state, ch, sg, i);
if (ret)
@ -3364,6 +3363,7 @@ static void srp_add_one(struct ib_device *device)
srp_dev->use_fast_reg = (srp_dev->has_fr &&
(!srp_dev->has_fmr || prefer_fr));
srp_dev->use_fmr = !srp_dev->use_fast_reg && srp_dev->has_fmr;
/*
* Use the smallest page size supported by the HCA, down to a

1
drivers/infiniband/ulp/srp/ib_srp.h
View File

@ -102,6 +102,7 @@ struct srp_device {
int max_pages_per_mr;
bool has_fmr;
bool has_fr;
bool use_fmr;
bool use_fast_reg;
};