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drm/xe: Allocate dedicated workqueue for SR-IOV workers

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We plan to use several workers where we might be running long
operations. Allocate dedicated workqueue to avoid undesired
interaction with non-virtualized workers.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20240104222031.277-2-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
This commit is contained in:
Michal Wajdeczko 2024-01-04 23:20:22 +01:00
parent 9bab383d47
commit 0cfb7caefa
4 changed files with 39 additions and 0 deletions
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4
drivers/gpu/drm/xe/xe_device.c
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@ -438,6 +438,10 @@ int xe_device_probe(struct xe_device *xe)
xe_pat_init_early(xe);
err = xe_sriov_init(xe);
if (err)
return err;
xe->info.mem_region_mask = 1;
err = xe_display_init_nommio(xe);
if (err)

2
drivers/gpu/drm/xe/xe_device_types.h
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@ -321,6 +321,8 @@ struct xe_device {
struct {
/** @sriov.__mode: SR-IOV mode (Don't access directly!) */
enum xe_sriov_mode __mode;
/** @sriov.wq: workqueue used by the virtualization workers */
struct workqueue_struct *wq;
} sriov;
/** @clients: drm clients info */

32
drivers/gpu/drm/xe/xe_sriov.c
View File

@ -3,6 +3,8 @@
* Copyright © 2023 Intel Corporation
*/
#include <drm/drm_managed.h>
#include "xe_assert.h"
#include "xe_sriov.h"
@ -53,3 +55,33 @@ void xe_sriov_probe_early(struct xe_device *xe, bool has_sriov)
drm_info(&xe->drm, "Running in %s mode\n",
xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
}
static void fini_sriov(struct drm_device *drm, void *arg)
{
struct xe_device *xe = arg;
destroy_workqueue(xe->sriov.wq);
xe->sriov.wq = NULL;
}
/**
* xe_sriov_init - Initialize SR-IOV specific data.
* @xe: the &xe_device to initialize
*
* In this function we create dedicated workqueue that will be used
* by the SR-IOV specific workers.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_sriov_init(struct xe_device *xe)
{
if (!IS_SRIOV(xe))
return 0;
xe_assert(xe, !xe->sriov.wq);
xe->sriov.wq = alloc_workqueue("xe-sriov-wq", 0, 0);
if (!xe->sriov.wq)
return -ENOMEM;
return drmm_add_action_or_reset(&xe->drm, fini_sriov, xe);
}

1
drivers/gpu/drm/xe/xe_sriov.h
View File

@ -13,6 +13,7 @@
const char *xe_sriov_mode_to_string(enum xe_sriov_mode mode);
void xe_sriov_probe_early(struct xe_device *xe, bool has_sriov);
int xe_sriov_init(struct xe_device *xe);
static inline enum xe_sriov_mode xe_device_sriov_mode(struct xe_device *xe)
{