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accel: Don't query the channel queue depth. Rely on -EBUSY

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We can just queue things up until we get -EBUSY and not track the queue
depth.

Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Change-Id: I49d3bcae0e6705a322de54fa91c9e1c6dfaea0c2
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11028
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Ben Walker 2022-01-10 15:44:33 -07:00 committed by Tomasz Zawadzki
parent c1ec924166
commit 5914f02b2a
1 changed files with 6 additions and 14 deletions
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20
module/accel/idxd/accel_engine_idxd.c
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@ -54,7 +54,6 @@ uint32_t g_config_number;
enum channel_state {
IDXD_CHANNEL_ACTIVE,
IDXD_CHANNEL_PAUSED,
IDXD_CHANNEL_ERROR,
};
@ -75,7 +74,6 @@ struct idxd_io_channel {
enum channel_state state;
struct spdk_poller *poller;
uint32_t num_outstanding;
uint32_t max_outstanding;
TAILQ_HEAD(, spdk_accel_task) queued_tasks;
};
@ -114,7 +112,6 @@ idxd_select_device(struct idxd_io_channel *chan)
*/
chan->chan = spdk_idxd_get_channel(dev->idxd);
if (chan->chan != NULL) {
chan->max_outstanding = spdk_idxd_chan_get_max_operations(chan->chan);
SPDK_DEBUGLOG(accel_idxd, "On socket %d using device on socket %d\n",
socket_id, spdk_idxd_get_socket(dev->idxd));
return dev;
@ -138,9 +135,7 @@ idxd_done(void *cb_arg, int status)
assert(chan->num_outstanding > 0);
spdk_trace_record(TRACE_IDXD_OP_COMPLETE, 0, 0, 0, chan->num_outstanding - 1);
if (chan->num_outstanding-- == chan->max_outstanding) {
chan->state = IDXD_CHANNEL_ACTIVE;
}
chan->num_outstanding--;
spdk_accel_task_complete(accel_task, status);
}
@ -156,11 +151,6 @@ _process_single_task(struct spdk_io_channel *ch, struct spdk_accel_task *task)
struct iovec siov = {};
struct iovec diov = {};
if (chan->num_outstanding == chan->max_outstanding) {
chan->state = IDXD_CHANNEL_PAUSED;
return -EBUSY;
}
switch (task->op_code) {
case ACCEL_OPCODE_MEMMOVE:
siov.iov_base = task->src;
@ -239,9 +229,7 @@ idxd_submit_tasks(struct spdk_io_channel *ch, struct spdk_accel_task *first_task
task = first_task;
if (chan->state == IDXD_CHANNEL_PAUSED) {
goto queue_tasks;
} else if (chan->state == IDXD_CHANNEL_ERROR) {
if (chan->state == IDXD_CHANNEL_ERROR) {
while (task) {
tmp = TAILQ_NEXT(task, link);
spdk_accel_task_complete(task, -EINVAL);
@ -250,6 +238,10 @@ idxd_submit_tasks(struct spdk_io_channel *ch, struct spdk_accel_task *first_task
return 0;
}
if (!TAILQ_EMPTY(&chan->queued_tasks)) {
goto queue_tasks;
}
/* The caller will either submit a single task or a group of tasks that are
* linked together but they cannot be on a list. For example, see idxd_poll()
* where a list of queued tasks is being resubmitted, the list they are on