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drm/xe/oa: Assign hwe for OAM_SAG

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Because OAM_SAG doesn't have an attached hwe, assign another hwe belonging
to the same gt (and different OAM unit) to OAM_SAG. A hwe is needed for
batch submissions to program OA HW.

v2: Assign an engine with a valid OA unit for OAM_SAG (Umesh)

Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://lore.kernel.org/r/20250606192618.4133817-5-ashutosh.dixit@intel.com
This commit is contained in:
Ashutosh Dixit 2025-06-06 12:26:16 -07:00
parent 2d1fcec022
commit 10d42ef34b
2 changed files with 37 additions and 21 deletions
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43
drivers/gpu/drm/xe/xe_oa.c
View File

@ -1923,37 +1923,48 @@ u16 xe_oa_unit_id(struct xe_hw_engine *hwe)
hwe->oa_unit->oa_unit_id : U16_MAX;
}
/* A hwe must be assigned to stream/oa_unit for batch submissions */
static int xe_oa_assign_hwe(struct xe_oa *oa, struct xe_oa_open_param *param)
{
struct xe_gt *gt;
int i, ret = 0;
if (param->exec_q) {
/* When we have an exec_q, get hwe from the exec_q */
param->hwe = xe_gt_hw_engine(param->exec_q->gt, param->exec_q->class,
param->engine_instance, true);
} else {
struct xe_hw_engine *hwe;
enum xe_hw_engine_id id;
int ret = 0;
/* If not provided, OA unit defaults to OA unit 0 as per uapi */
if (!param->oa_unit)
param->oa_unit = &xe_device_get_gt(oa->xe, 0)->oa.oa_unit[0];
/* When we have an exec_q, get hwe from the exec_q */
if (param->exec_q) {
param->hwe = xe_gt_hw_engine(param->exec_q->gt, param->exec_q->class,
param->engine_instance, true);
if (!param->hwe || param->hwe->oa_unit != param->oa_unit)
goto err;
goto out;
}
/* Else just get the first hwe attached to the oa unit */
for_each_gt(gt, oa->xe, i) {
for_each_hw_engine(hwe, gt, id) {
for_each_hw_engine(hwe, param->oa_unit->gt, id) {
if (hwe->oa_unit == param->oa_unit) {
param->hwe = hwe;
goto out;
}
}
/* If we still didn't find a hwe, just get one with a valid oa_unit from the same gt */
for_each_hw_engine(hwe, param->oa_unit->gt, id) {
if (!hwe->oa_unit)
continue;
param->hwe = hwe;
goto out;
}
}
out:
if (!param->hwe || param->hwe->oa_unit != param->oa_unit) {
err:
drm_dbg(&oa->xe->drm, "Unable to find hwe (%d, %d) for OA unit ID %d\n",
param->exec_q ? param->exec_q->class : -1,
param->engine_instance, param->oa_unit->oa_unit_id);
ret = -EINVAL;
}
out:
return ret;
}
@ -2578,6 +2589,8 @@ static void __xe_oa_init_oa_units(struct xe_gt *gt)
DRM_XE_OA_UNIT_TYPE_OAM_SAG : DRM_XE_OA_UNIT_TYPE_OAM;
}
u->gt = gt;
xe_mmio_write32(&gt->mmio, u->regs.oa_ctrl, 0);
/* Ensure MMIO trigger remains disabled till there is a stream */

3
drivers/gpu/drm/xe/xe_oa_types.h
View File

@ -95,6 +95,9 @@ struct xe_oa_unit {
/** @oa_unit_id: identifier for the OA unit */
u16 oa_unit_id;
/** @gt: gt associated with the OA unit */
struct xe_gt *gt;
/** @type: Type of OA unit - OAM, OAG etc. */
enum drm_xe_oa_unit_type type;