accel: Return correct values for .get_ctx_size()

This expects the full size of the task for each module. This only worked
because the software module returned the right size.

Change-Id: I481cfad8b4bb9c3748301bdacd90e7f44fd2d878
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13913
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>

lib/accel/accel_engine.c

@@ -28,7 +28,7 @@
 #define MAX_TASKS_PER_CHANNEL		0x800
 
 /* Largest context size for all accel modules */
-static size_t g_max_accel_module_size = 0;
+static size_t g_max_accel_module_size = sizeof(struct spdk_accel_task);
 
 static struct spdk_accel_module_if *g_accel_engine_module = NULL;
 static spdk_accel_fini_cb g_fini_cb_fn = NULL;

module/accel/dsa/accel_engine_dsa.c

@@ -286,7 +286,7 @@ idxd_poll(void *arg)
 static size_t
 accel_engine_dsa_get_ctx_size(void)
 {
-	return 0;
+	return sizeof(struct spdk_accel_task);
 }
 
 static bool

module/accel/iaa/accel_engine_iaa.c

@@ -230,7 +230,7 @@ idxd_poll(void *arg)
 static size_t
 accel_engine_iaa_get_ctx_size(void)
 {
-	return 0;
+	return sizeof(struct spdk_accel_task);
 }
 
 static bool

module/accel/ioat/accel_engine_ioat.c

@@ -76,7 +76,7 @@ static int ioat_submit_tasks(struct spdk_io_channel *ch, struct spdk_accel_task
 static size_t
 accel_engine_ioat_get_ctx_size(void)
 {
-	return 0;
+	return sizeof(struct spdk_accel_task);
 }
 
 static struct spdk_accel_module_if g_ioat_module = {