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drm/xe/tests: Add KUnit tests for PF fair provisioning

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Add test cases to check outcome of fair GuC context or doorbells
IDs allocations for regular and admin-only PF mode.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20251106165932.2143-1-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko 2025-11-06 17:59:32 +01:00
parent bfbcf66186
commit a46768ef5f
2 changed files with 166 additions and 0 deletions
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162
drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c Normal file
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@ -0,0 +1,162 @@
// SPDX-License-Identifier: GPL-2.0 AND MIT
/*
* Copyright © 2025 Intel Corporation
*/
#include <kunit/static_stub.h>
#include <kunit/test.h>
#include <kunit/test-bug.h>
#include "xe_kunit_helpers.h"
#include "xe_pci_test.h"
#define TEST_MAX_VFS 63
static void pf_set_admin_mode(struct xe_device *xe, bool enable)
{
/* should match logic of xe_sriov_pf_admin_only() */
xe->info.probe_display = !enable;
KUNIT_EXPECT_EQ(kunit_get_current_test(), enable, xe_sriov_pf_admin_only(xe));
}
static const void *num_vfs_gen_param(struct kunit *test, const void *prev, char *desc)
{
unsigned long next = 1 + (unsigned long)prev;
if (next > TEST_MAX_VFS)
return NULL;
snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%lu VF%s",
next, str_plural(next));
return (void *)next;
}
static int pf_gt_config_test_init(struct kunit *test)
{
struct xe_pci_fake_data fake = {
.sriov_mode = XE_SRIOV_MODE_PF,
.platform = XE_TIGERLAKE, /* any random platform with SR-IOV */
.subplatform = XE_SUBPLATFORM_NONE,
};
struct xe_device *xe;
struct xe_gt *gt;
test->priv = &fake;
xe_kunit_helper_xe_device_test_init(test);
xe = test->priv;
KUNIT_ASSERT_TRUE(test, IS_SRIOV_PF(xe));
gt = xe_root_mmio_gt(xe);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, gt);
test->priv = gt;
/* pretend it can support up to 63 VFs */
xe->sriov.pf.device_total_vfs = TEST_MAX_VFS;
xe->sriov.pf.driver_max_vfs = TEST_MAX_VFS;
KUNIT_ASSERT_EQ(test, xe_sriov_pf_get_totalvfs(xe), 63);
pf_set_admin_mode(xe, false);
KUNIT_ASSERT_EQ(test, xe_sriov_init(xe), 0);
/* more sanity checks */
KUNIT_EXPECT_EQ(test, GUC_ID_MAX + 1, SZ_64K);
KUNIT_EXPECT_EQ(test, GUC_NUM_DOORBELLS, SZ_256);
return 0;
}
static void fair_contexts_1vf(struct kunit *test)
{
struct xe_gt *gt = test->priv;
struct xe_device *xe = gt_to_xe(gt);
pf_set_admin_mode(xe, false);
KUNIT_ASSERT_FALSE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_EQ(test, SZ_32K, pf_profile_fair_ctxs(gt, 1));
pf_set_admin_mode(xe, true);
KUNIT_ASSERT_TRUE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_EQ(test, SZ_64K - SZ_1K, pf_profile_fair_ctxs(gt, 1));
}
static void fair_contexts(struct kunit *test)
{
unsigned int num_vfs = (unsigned long)test->param_value;
struct xe_gt *gt = test->priv;
struct xe_device *xe = gt_to_xe(gt);
pf_set_admin_mode(xe, false);
KUNIT_ASSERT_FALSE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_TRUE(test, is_power_of_2(pf_profile_fair_ctxs(gt, num_vfs)));
KUNIT_EXPECT_GT(test, GUC_ID_MAX, num_vfs * pf_profile_fair_ctxs(gt, num_vfs));
if (num_vfs > 31)
KUNIT_ASSERT_EQ(test, SZ_1K, pf_profile_fair_ctxs(gt, num_vfs));
else if (num_vfs > 15)
KUNIT_ASSERT_EQ(test, SZ_2K, pf_profile_fair_ctxs(gt, num_vfs));
else if (num_vfs > 7)
KUNIT_ASSERT_EQ(test, SZ_4K, pf_profile_fair_ctxs(gt, num_vfs));
else if (num_vfs > 3)
KUNIT_ASSERT_EQ(test, SZ_8K, pf_profile_fair_ctxs(gt, num_vfs));
else if (num_vfs > 1)
KUNIT_ASSERT_EQ(test, SZ_16K, pf_profile_fair_ctxs(gt, num_vfs));
else
KUNIT_ASSERT_EQ(test, SZ_32K, pf_profile_fair_ctxs(gt, num_vfs));
}
static void fair_doorbells_1vf(struct kunit *test)
{
struct xe_gt *gt = test->priv;
struct xe_device *xe = gt_to_xe(gt);
pf_set_admin_mode(xe, false);
KUNIT_ASSERT_FALSE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_EQ(test, 128, pf_profile_fair_dbs(gt, 1));
pf_set_admin_mode(xe, true);
KUNIT_ASSERT_TRUE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_EQ(test, 240, pf_profile_fair_dbs(gt, 1));
}
static void fair_doorbells(struct kunit *test)
{
unsigned int num_vfs = (unsigned long)test->param_value;
struct xe_gt *gt = test->priv;
struct xe_device *xe = gt_to_xe(gt);
pf_set_admin_mode(xe, false);
KUNIT_ASSERT_FALSE(test, xe_sriov_pf_admin_only(xe));
KUNIT_EXPECT_TRUE(test, is_power_of_2(pf_profile_fair_dbs(gt, num_vfs)));
KUNIT_EXPECT_GE(test, GUC_NUM_DOORBELLS, (num_vfs + 1) * pf_profile_fair_dbs(gt, num_vfs));
if (num_vfs > 31)
KUNIT_ASSERT_EQ(test, SZ_4, pf_profile_fair_dbs(gt, num_vfs));
else if (num_vfs > 15)
KUNIT_ASSERT_EQ(test, SZ_8, pf_profile_fair_dbs(gt, num_vfs));
else if (num_vfs > 7)
KUNIT_ASSERT_EQ(test, SZ_16, pf_profile_fair_dbs(gt, num_vfs));
else if (num_vfs > 3)
KUNIT_ASSERT_EQ(test, SZ_32, pf_profile_fair_dbs(gt, num_vfs));
else if (num_vfs > 1)
KUNIT_ASSERT_EQ(test, SZ_64, pf_profile_fair_dbs(gt, num_vfs));
else
KUNIT_ASSERT_EQ(test, SZ_128, pf_profile_fair_dbs(gt, num_vfs));
}
static struct kunit_case pf_gt_config_test_cases[] = {
KUNIT_CASE(fair_contexts_1vf),
KUNIT_CASE(fair_doorbells_1vf),
KUNIT_CASE_PARAM(fair_contexts, num_vfs_gen_param),
KUNIT_CASE_PARAM(fair_doorbells, num_vfs_gen_param),
{}
};
static struct kunit_suite pf_gt_config_suite = {
.name = "pf_gt_config",
.test_cases = pf_gt_config_test_cases,
.init = pf_gt_config_test_init,
};
kunit_test_suite(pf_gt_config_suite);

4
drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
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@ -2826,3 +2826,7 @@ int xe_gt_sriov_pf_config_print_available_ggtt(struct xe_gt *gt, struct drm_prin
return 0;
}
#if IS_BUILTIN(CONFIG_DRM_XE_KUNIT_TEST)
#include "tests/xe_gt_sriov_pf_config_kunit.c"
#endif