From: Michal Wajdeczko Date: Thu, 6 Nov 2025 16:59:32 +0000 (+0100) Subject: drm/xe/tests: Add KUnit tests for PF fair provisioning X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a46768ef5f91f2029a67513f43658dfa5451be4a;p=thirdparty%2Fkernel%2Flinux.git drm/xe/tests: Add KUnit tests for PF fair provisioning 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 Reviewed-by: Piotr Piórkowski Link: https://patch.msgid.link/20251106165932.2143-1-michal.wajdeczko@intel.com --- diff --git a/drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c b/drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c new file mode 100644 index 0000000000000..cb3db3e793e15 --- /dev/null +++ b/drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0 AND MIT +/* + * Copyright © 2025 Intel Corporation + */ + +#include +#include +#include + +#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); diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c index 701889e5ddedc..80cc3f2cd047d 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c @@ -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