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drm/xe/pf: Promote VFs provisioning helpers

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As we plan to add more VFs provisioning methods, start moving
related code into single place.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20251015091211.592-2-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2025-10-15 11:12:06 +02:00
parent 37c8c8d9c6
commit a5efeaf8a1
4 changed files with 102 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/xe/Makefile
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@@ -176,6 +176,7 @@ xe-$(CONFIG_PCI_IOV) += \
xe_sriov_pf.o \
xe_sriov_pf_control.o \
xe_sriov_pf_debugfs.o \
xe_sriov_pf_provision.o \
xe_sriov_pf_service.o \
xe_tile_sriov_pf_debugfs.o

45
drivers/gpu/drm/xe/xe_pci_sriov.c
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@@ -19,46 +19,9 @@
#include "xe_sriov_pf.h"
#include "xe_sriov_pf_control.h"
#include "xe_sriov_pf_helpers.h"
#include "xe_sriov_pf_provision.h"
#include "xe_sriov_printk.h"
static int pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs)
{
unsigned int n;
for (n = 1; n <= num_vfs; n++)
if (!xe_gt_sriov_pf_config_is_empty(gt, n))
return false;
return true;
}
static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
struct xe_gt *gt;
unsigned int id;
int result = 0, err;
for_each_gt(gt, xe, id) {
if (!pf_needs_provisioning(gt, num_vfs))
continue;
err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs);
result = result ?: err;
}
return result;
}
static void pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
struct xe_gt *gt;
unsigned int id;
unsigned int n;
for_each_gt(gt, xe, id)
for (n = 1; n <= num_vfs; n++)
xe_gt_sriov_pf_config_release(gt, n, true);
}
static void pf_reset_vfs(struct xe_device *xe, unsigned int num_vfs)
{
unsigned int n;
@@ -168,7 +131,7 @@ static int pf_enable_vfs(struct xe_device *xe, int num_vfs)
*/
xe_pm_runtime_get_noresume(xe);
err = pf_provision_vfs(xe, num_vfs);
err = xe_sriov_pf_provision_vfs(xe, num_vfs);
if (err < 0)
goto failed;
@@ -192,7 +155,7 @@ static int pf_enable_vfs(struct xe_device *xe, int num_vfs)
return num_vfs;
failed:
pf_unprovision_vfs(xe, num_vfs);
xe_sriov_pf_unprovision_vfs(xe, num_vfs);
xe_pm_runtime_put(xe);
out:
xe_sriov_notice(xe, "Failed to enable %u VF%s (%pe)\n",
@@ -218,7 +181,7 @@ static int pf_disable_vfs(struct xe_device *xe)
pf_reset_vfs(xe, num_vfs);
pf_unprovision_vfs(xe, num_vfs);
xe_sriov_pf_unprovision_vfs(xe, num_vfs);
/* not needed anymore - see pf_enable_vfs() */
xe_pm_runtime_put(xe);

83
drivers/gpu/drm/xe/xe_sriov_pf_provision.c Normal file
View File

@@ -0,0 +1,83 @@
// SPDX-License-Identifier: MIT
/*
* Copyright © 2025 Intel Corporation
*/
#include "xe_assert.h"
#include "xe_device.h"
#include "xe_gt_sriov_pf_config.h"
#include "xe_sriov.h"
#include "xe_sriov_pf_helpers.h"
#include "xe_sriov_pf_provision.h"
static bool pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs)
{
unsigned int n;
for (n = 1; n <= num_vfs; n++)
if (!xe_gt_sriov_pf_config_is_empty(gt, n))
return false;
return true;
}
static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
struct xe_gt *gt;
unsigned int id;
int result = 0;
int err;
for_each_gt(gt, xe, id) {
if (!pf_needs_provisioning(gt, num_vfs))
continue;
err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs);
result = result ?: err;
}
return result;
}
static void pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
struct xe_gt *gt;
unsigned int id;
unsigned int n;
for_each_gt(gt, xe, id)
for (n = 1; n <= num_vfs; n++)
xe_gt_sriov_pf_config_release(gt, n, true);
}
/**
* xe_sriov_pf_provision_vfs() - Provision VFs in auto-mode.
* @xe: the PF &xe_device
* @num_vfs: the number of VFs to auto-provision
*
* This function can only be called on PF.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
xe_assert(xe, IS_SRIOV_PF(xe));
return pf_provision_vfs(xe, num_vfs);
}
/**
* xe_sriov_pf_unprovision_vfs() - Unprovision VFs in auto-mode.
* @xe: the PF &xe_device
* @num_vfs: the number of VFs to unprovision
*
* This function can only be called on PF.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
{
xe_assert(xe, IS_SRIOV_PF(xe));
pf_unprovision_vfs(xe, num_vfs);
return 0;
}

14
drivers/gpu/drm/xe/xe_sriov_pf_provision.h Normal file
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@@ -0,0 +1,14 @@
/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2025 Intel Corporation
*/
#ifndef _XE_SRIOV_PF_PROVISION_H_
#define _XE_SRIOV_PF_PROVISION_H_
struct xe_device;
int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs);
int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs);
#endif