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drm/xe/pf: Introduce mutex to protect VFs configurations

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PF driver will maintain configurations and resources for every VF
and this data could span multiple tiles and/or GTs.  Prepare mutex
to protect data that we will add in upcoming patches.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240410170338.1199-2-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko 2024-04-10 19:03:34 +02:00
parent 79790b6818
commit 0bdd5b16ba
4 changed files with 32 additions and 0 deletions
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7
drivers/gpu/drm/xe/xe_sriov.c
View File

@ -94,6 +94,13 @@ int xe_sriov_init(struct xe_device *xe)
if (!IS_SRIOV(xe))
return 0;
if (IS_SRIOV_PF(xe)) {
int err = xe_sriov_pf_init_early(xe);
if (err)
return err;
}
xe_assert(xe, !xe->sriov.wq);
xe->sriov.wq = alloc_workqueue("xe-sriov-wq", 0, 0);
if (!xe->sriov.wq)

15
drivers/gpu/drm/xe/xe_sriov_pf.c
View File

@ -3,6 +3,8 @@
* Copyright © 2023-2024 Intel Corporation
*/
#include <drm/drm_managed.h>
#include "xe_assert.h"
#include "xe_device.h"
#include "xe_module.h"
@ -70,6 +72,19 @@ bool xe_sriov_pf_readiness(struct xe_device *xe)
return true;
}
/**
* xe_sriov_pf_init_early - Initialize SR-IOV PF specific data.
* @xe: the &xe_device to initialize
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_sriov_pf_init_early(struct xe_device *xe)
{
xe_assert(xe, IS_SRIOV_PF(xe));
return drmm_mutex_init(&xe->drm, &xe->sriov.pf.master_lock);
}
/**
* xe_sriov_pf_print_vfs_summary - Print SR-IOV PF information.
* @xe: the &xe_device to print info from

6
drivers/gpu/drm/xe/xe_sriov_pf.h
View File

@ -13,12 +13,18 @@ struct xe_device;
#ifdef CONFIG_PCI_IOV
bool xe_sriov_pf_readiness(struct xe_device *xe);
int xe_sriov_pf_init_early(struct xe_device *xe);
void xe_sriov_pf_print_vfs_summary(struct xe_device *xe, struct drm_printer *p);
#else
static inline bool xe_sriov_pf_readiness(struct xe_device *xe)
{
return false;
}
static inline int xe_sriov_pf_init_early(struct xe_device *xe)
{
return 0;
}
#endif
#endif

4
drivers/gpu/drm/xe/xe_sriov_types.h
View File

@ -7,6 +7,7 @@
#define _XE_SRIOV_TYPES_H_
#include <linux/build_bug.h>
#include <linux/mutex.h>
#include <linux/types.h>
/**
@ -50,6 +51,9 @@ struct xe_device_pf {
/** @driver_max_vfs: Maximum number of VFs supported by the driver. */
u16 driver_max_vfs;
/** @master_lock: protects all VFs configurations across GTs */
struct mutex master_lock;
};
#endif