Commit 0bdd5b16 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

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



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: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240410170338.1199-2-michal.wajdeczko@intel.com
parent 79790b68

drivers/gpu/drm/xe/xe_sriov.c

+7 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/drm/xe/xe_sriov_pf.c

+15 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/xe/xe_sriov_pf.h

+6 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/xe/xe_sriov_types.h

+4 −0
Original line number Diff line number Diff line
@@ -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