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nvme-fabrics: add queue setup helpers

Browse source 
tcp and rdma transports have lots of duplicate code setting up the
different queue mappings. Add common helpers.

Cc: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Keith Busch 2023-04-26 08:04:41 -07:00
parent 4a4d9bc0c8
commit a249d3066d
4 changed files with 95 additions and 161 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

76
drivers/nvme/host/fabrics.c
View file

@ -957,6 +957,82 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
return ret;
}
void nvmf_set_io_queues(struct nvmf_ctrl_options *opts, u32 nr_io_queues,
u32 io_queues[HCTX_MAX_TYPES])
{
if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) {
/*
* separate read/write queues
* hand out dedicated default queues only after we have
* sufficient read queues.
*/
io_queues[HCTX_TYPE_READ] = opts->nr_io_queues;
nr_io_queues -= io_queues[HCTX_TYPE_READ];
io_queues[HCTX_TYPE_DEFAULT] =
min(opts->nr_write_queues, nr_io_queues);
nr_io_queues -= io_queues[HCTX_TYPE_DEFAULT];
} else {
/*
* shared read/write queues
* either no write queues were requested, or we don't have
* sufficient queue count to have dedicated default queues.
*/
io_queues[HCTX_TYPE_DEFAULT] =
min(opts->nr_io_queues, nr_io_queues);
nr_io_queues -= io_queues[HCTX_TYPE_DEFAULT];
}
if (opts->nr_poll_queues && nr_io_queues) {
/* map dedicated poll queues only if we have queues left */
io_queues[HCTX_TYPE_POLL] =
min(opts->nr_poll_queues, nr_io_queues);
}
}
EXPORT_SYMBOL_GPL(nvmf_set_io_queues);
void nvmf_map_queues(struct blk_mq_tag_set *set, struct nvme_ctrl *ctrl,
u32 io_queues[HCTX_MAX_TYPES])
{
struct nvmf_ctrl_options *opts = ctrl->opts;
if (opts->nr_write_queues && io_queues[HCTX_TYPE_READ]) {
/* separate read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
io_queues[HCTX_TYPE_READ];
set->map[HCTX_TYPE_READ].queue_offset =
io_queues[HCTX_TYPE_DEFAULT];
} else {
/* shared read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_READ].queue_offset = 0;
}
blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
blk_mq_map_queues(&set->map[HCTX_TYPE_READ]);
if (opts->nr_poll_queues && io_queues[HCTX_TYPE_POLL]) {
/* map dedicated poll queues only if we have queues left */
set->map[HCTX_TYPE_POLL].nr_queues = io_queues[HCTX_TYPE_POLL];
set->map[HCTX_TYPE_POLL].queue_offset =
io_queues[HCTX_TYPE_DEFAULT] +
io_queues[HCTX_TYPE_READ];
blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]);
}
dev_info(ctrl->device,
"mapped %d/%d/%d default/read/poll queues.\n",
io_queues[HCTX_TYPE_DEFAULT],
io_queues[HCTX_TYPE_READ],
io_queues[HCTX_TYPE_POLL]);
}
EXPORT_SYMBOL_GPL(nvmf_map_queues);
static int nvmf_check_required_opts(struct nvmf_ctrl_options *opts,
unsigned int required_opts)
{

11
drivers/nvme/host/fabrics.h
View file

@ -203,6 +203,13 @@ static inline void nvmf_complete_timed_out_request(struct request *rq)
}
}
static inline unsigned int nvmf_nr_io_queues(struct nvmf_ctrl_options *opts)
{
return min(opts->nr_io_queues, num_online_cpus()) +
min(opts->nr_write_queues, num_online_cpus()) +
min(opts->nr_poll_queues, num_online_cpus());
}
int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val);
int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val);
int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val);
@ -215,5 +222,9 @@ int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size);
bool nvmf_should_reconnect(struct nvme_ctrl *ctrl);
bool nvmf_ip_options_match(struct nvme_ctrl *ctrl,
struct nvmf_ctrl_options *opts);
void nvmf_set_io_queues(struct nvmf_ctrl_options *opts, u32 nr_io_queues,
u32 io_queues[HCTX_MAX_TYPES]);
void nvmf_map_queues(struct blk_mq_tag_set *set, struct nvme_ctrl *ctrl,
u32 io_queues[HCTX_MAX_TYPES]);
#endif /* _NVME_FABRICS_H */

79
drivers/nvme/host/rdma.c
View file

@ -713,18 +713,10 @@ static int nvme_rdma_start_io_queues(struct nvme_rdma_ctrl *ctrl,
static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
{
struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;
struct ib_device *ibdev = ctrl->device->dev;
unsigned int nr_io_queues, nr_default_queues;
unsigned int nr_read_queues, nr_poll_queues;
unsigned int nr_io_queues;
int i, ret;
nr_read_queues = min_t(unsigned int, ibdev->num_comp_vectors,
min(opts->nr_io_queues, num_online_cpus()));
nr_default_queues = min_t(unsigned int, ibdev->num_comp_vectors,
min(opts->nr_write_queues, num_online_cpus()));
nr_poll_queues = min(opts->nr_poll_queues, num_online_cpus());
nr_io_queues = nr_read_queues + nr_default_queues + nr_poll_queues;
nr_io_queues = nvmf_nr_io_queues(opts);
ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);
if (ret)
return ret;
@ -739,34 +731,7 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
dev_info(ctrl->ctrl.device,
"creating %d I/O queues.\n", nr_io_queues);
if (opts->nr_write_queues && nr_read_queues < nr_io_queues) {
/*
* separate read/write queues
* hand out dedicated default queues only after we have
* sufficient read queues.
*/
ctrl->io_queues[HCTX_TYPE_READ] = nr_read_queues;
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ];
ctrl->io_queues[HCTX_TYPE_DEFAULT] =
min(nr_default_queues, nr_io_queues);
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT];
} else {
/*
* shared read/write queues
* either no write queues were requested, or we don't have
* sufficient queue count to have dedicated default queues.
*/
ctrl->io_queues[HCTX_TYPE_DEFAULT] =
min(nr_read_queues, nr_io_queues);
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT];
}
if (opts->nr_poll_queues && nr_io_queues) {
/* map dedicated poll queues only if we have queues left */
ctrl->io_queues[HCTX_TYPE_POLL] =
min(nr_poll_queues, nr_io_queues);
}
nvmf_set_io_queues(opts, nr_io_queues, ctrl->io_queues);
for (i = 1; i < ctrl->ctrl.queue_count; i++) {
ret = nvme_rdma_alloc_queue(ctrl, i,
ctrl->ctrl.sqsize + 1);
@ -2138,44 +2103,8 @@ static void nvme_rdma_complete_rq(struct request *rq)
static void nvme_rdma_map_queues(struct blk_mq_tag_set *set)
{
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(set->driver_data);
struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;
if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) {
/* separate read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
ctrl->io_queues[HCTX_TYPE_READ];
set->map[HCTX_TYPE_READ].queue_offset =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
} else {
/* shared read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_READ].queue_offset = 0;
}
blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
blk_mq_map_queues(&set->map[HCTX_TYPE_READ]);
if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) {
/* map dedicated poll queues only if we have queues left */
set->map[HCTX_TYPE_POLL].nr_queues =
ctrl->io_queues[HCTX_TYPE_POLL];
set->map[HCTX_TYPE_POLL].queue_offset =
ctrl->io_queues[HCTX_TYPE_DEFAULT] +
ctrl->io_queues[HCTX_TYPE_READ];
blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]);
}
dev_info(ctrl->ctrl.device,
"mapped %d/%d/%d default/read/poll queues.\n",
ctrl->io_queues[HCTX_TYPE_DEFAULT],
ctrl->io_queues[HCTX_TYPE_READ],
ctrl->io_queues[HCTX_TYPE_POLL]);
nvmf_map_queues(set, &ctrl->ctrl, ctrl->io_queues);
}
static const struct blk_mq_ops nvme_rdma_mq_ops = {

90
drivers/nvme/host/tcp.c
View file

@ -1802,58 +1802,12 @@ static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)
return ret;
}
static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl)
{
unsigned int nr_io_queues;
nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus());
nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus());
nr_io_queues += min(ctrl->opts->nr_poll_queues, num_online_cpus());
return nr_io_queues;
}
static void nvme_tcp_set_io_queues(struct nvme_ctrl *nctrl,
unsigned int nr_io_queues)
{
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl);
struct nvmf_ctrl_options *opts = nctrl->opts;
if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) {
/*
* separate read/write queues
* hand out dedicated default queues only after we have
* sufficient read queues.
*/
ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues;
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ];
ctrl->io_queues[HCTX_TYPE_DEFAULT] =
min(opts->nr_write_queues, nr_io_queues);
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT];
} else {
/*
* shared read/write queues
* either no write queues were requested, or we don't have
* sufficient queue count to have dedicated default queues.
*/
ctrl->io_queues[HCTX_TYPE_DEFAULT] =
min(opts->nr_io_queues, nr_io_queues);
nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT];
}
if (opts->nr_poll_queues && nr_io_queues) {
/* map dedicated poll queues only if we have queues left */
ctrl->io_queues[HCTX_TYPE_POLL] =
min(opts->nr_poll_queues, nr_io_queues);
}
}
static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)
{
unsigned int nr_io_queues;
int ret;
nr_io_queues = nvme_tcp_nr_io_queues(ctrl);
nr_io_queues = nvmf_nr_io_queues(ctrl->opts);
ret = nvme_set_queue_count(ctrl, &nr_io_queues);
if (ret)
return ret;
@ -1868,8 +1822,8 @@ static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)
dev_info(ctrl->device,
"creating %d I/O queues.\n", nr_io_queues);
nvme_tcp_set_io_queues(ctrl, nr_io_queues);
nvmf_set_io_queues(ctrl->opts, nr_io_queues,
to_tcp_ctrl(ctrl)->io_queues);
return __nvme_tcp_alloc_io_queues(ctrl);
}
@ -2449,44 +2403,8 @@ static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx,
static void nvme_tcp_map_queues(struct blk_mq_tag_set *set)
{
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(set->driver_data);
struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;
if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) {
/* separate read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
ctrl->io_queues[HCTX_TYPE_READ];
set->map[HCTX_TYPE_READ].queue_offset =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
} else {
/* shared read/write queues */
set->map[HCTX_TYPE_DEFAULT].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_DEFAULT].queue_offset = 0;
set->map[HCTX_TYPE_READ].nr_queues =
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_READ].queue_offset = 0;
}
blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
blk_mq_map_queues(&set->map[HCTX_TYPE_READ]);
if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) {
/* map dedicated poll queues only if we have queues left */
set->map[HCTX_TYPE_POLL].nr_queues =
ctrl->io_queues[HCTX_TYPE_POLL];
set->map[HCTX_TYPE_POLL].queue_offset =
ctrl->io_queues[HCTX_TYPE_DEFAULT] +
ctrl->io_queues[HCTX_TYPE_READ];
blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]);
}
dev_info(ctrl->ctrl.device,
"mapped %d/%d/%d default/read/poll queues.\n",
ctrl->io_queues[HCTX_TYPE_DEFAULT],
ctrl->io_queues[HCTX_TYPE_READ],
ctrl->io_queues[HCTX_TYPE_POLL]);
nvmf_map_queues(set, &ctrl->ctrl, ctrl->io_queues);
}
static int nvme_tcp_poll(struct blk_mq_hw_ctx *hctx, struct io_comp_batch *iob)