From patchwork Mon Oct 21 08:02:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11201513 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0863014E5 for ; Mon, 21 Oct 2019 08:03:17 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E4EDE20684 for ; Mon, 21 Oct 2019 08:03:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E4EDE20684 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4832A89B68; Mon, 21 Oct 2019 08:03:16 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 60E8289B3C for ; Mon, 21 Oct 2019 08:02:48 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 18908651-1500050 for multiple; Mon, 21 Oct 2019 09:02:30 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Mon, 21 Oct 2019 09:02:13 +0100 Message-Id: <20191021080226.537-3-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.24.0.rc0 In-Reply-To: <20191021080226.537-1-chris@chris-wilson.co.uk> References: <20191021080226.537-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 03/16] drm/i915/selftests: Add coverage of mocs registers X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Probe the mocs registers for new contexts and across GPU resets. Similar to intel_workarounds, we have tables of what register values we expect to see, so verify that user contexts are affected by them. In the future, we should add tests similar to intel_sseu to cover dynamic reconfigurations. Signed-off-by: Chris Wilson Cc: Prathap Kumar Valsan Cc: Mika Kuoppala --- drivers/gpu/drm/i915/gt/intel_mocs.c | 4 + drivers/gpu/drm/i915/gt/selftest_mocs.c | 431 ++++++++++++++++++ .../drm/i915/selftests/i915_live_selftests.h | 1 + 3 files changed, 436 insertions(+) create mode 100644 drivers/gpu/drm/i915/gt/selftest_mocs.c diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c index 5bac3966906b..f5a239640553 100644 --- a/drivers/gpu/drm/i915/gt/intel_mocs.c +++ b/drivers/gpu/drm/i915/gt/intel_mocs.c @@ -490,3 +490,7 @@ void intel_mocs_init(struct intel_gt *gt) if (HAS_GLOBAL_MOCS_REGISTERS(gt->i915)) intel_mocs_init_global(gt); } + +#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) +#include "selftest_mocs.c" +#endif diff --git a/drivers/gpu/drm/i915/gt/selftest_mocs.c b/drivers/gpu/drm/i915/gt/selftest_mocs.c new file mode 100644 index 000000000000..94c1c638621b --- /dev/null +++ b/drivers/gpu/drm/i915/gt/selftest_mocs.c @@ -0,0 +1,431 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2019 Intel Corporation + */ + +#include "gt/intel_engine_pm.h" +#include "i915_selftest.h" + +#include "gem/selftests/mock_context.h" +#include "selftests/igt_reset.h" +#include "selftests/igt_spinner.h" + +struct live_mocs { + struct drm_i915_mocs_table table; + struct i915_gem_context *ctx; + struct i915_vma *scratch; + void *vaddr; +}; + +static int request_add_sync(struct i915_request *rq, int err) +{ + i915_request_get(rq); + i915_request_add(rq); + if (i915_request_wait(rq, 0, HZ / 5) < 0) + err = -ETIME; + i915_request_put(rq); + + return err; +} + +static int request_add_spin(struct i915_request *rq, struct igt_spinner *spin) +{ + int err = 0; + + i915_request_get(rq); + i915_request_add(rq); + if (spin && !igt_wait_for_spinner(spin, rq)) + err = -ETIME; + i915_request_put(rq); + + return err; +} + +static struct i915_vma *create_scratch(struct intel_gt *gt) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int err; + + obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE); + if (IS_ERR(obj)) + return ERR_CAST(obj); + + i915_gem_object_set_cache_coherency(obj, I915_CACHING_CACHED); + + vma = i915_vma_instance(obj, >->ggtt->vm, NULL); + if (IS_ERR(vma)) { + i915_gem_object_put(obj); + return vma; + } + + err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); + if (err) { + i915_gem_object_put(obj); + return ERR_PTR(err); + } + + return vma; +} + +static int live_mocs_init(struct live_mocs *arg, struct intel_gt *gt) +{ + int err; + + if (!get_mocs_settings(gt->i915, &arg->table)) + return -EINVAL; + + arg->ctx = kernel_context(gt->i915); + if (!arg->ctx) + return -ENOMEM; + + arg->scratch = create_scratch(gt); + if (IS_ERR(arg->scratch)) { + err = PTR_ERR(arg->scratch); + goto err_ctx; + } + + arg->vaddr = i915_gem_object_pin_map(arg->scratch->obj, I915_MAP_WB); + if (IS_ERR(arg->vaddr)) { + err = PTR_ERR(arg->vaddr); + goto err_scratch; + } + + return 0; + +err_scratch: + i915_vma_unpin_and_release(&arg->scratch, 0); +err_ctx: + kernel_context_close(arg->ctx); + return err; +} + +static void live_mocs_fini(struct live_mocs *arg) +{ + i915_vma_unpin_and_release(&arg->scratch, I915_VMA_RELEASE_MAP); + kernel_context_close(arg->ctx); +} + +static int read_mocs_table(struct i915_request *rq, + const struct drm_i915_mocs_table *table, + struct i915_vma *vma, int *offset) +{ + unsigned int i; + u32 *cs; + + cs = intel_ring_begin(rq, 4 * table->n_entries); + if (IS_ERR(cs)) + return PTR_ERR(cs); + + for (i = 0; i < table->n_entries; i++) { + *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; + *cs++ = i915_mmio_reg_offset(HAS_GLOBAL_MOCS_REGISTERS(rq->i915) ? + GEN12_GLOBAL_MOCS(i) : + mocs_register(rq->engine, i)); + *cs++ = i915_ggtt_offset(vma) + i * sizeof(u32) + *offset; + *cs++ = 0; + } + + intel_ring_advance(rq, cs); + *offset += i * sizeof(u32); + + return 0; +} + +static int read_l3cc_table(struct i915_request *rq, + const struct drm_i915_mocs_table *table, + struct i915_vma *vma, int *offset) +{ + unsigned int i; + u32 *cs; + + cs = intel_ring_begin(rq, 4 * table->n_entries / 2); + if (IS_ERR(cs)) + return PTR_ERR(cs); + + /* XXX can't read the MCR range 0xb00 directly */ + for (i = 0; i < table->n_entries / 2; i++) { + *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; + *cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i)); + *cs++ = i915_ggtt_offset(vma) + i * sizeof(u32) + *offset; + *cs++ = 0; + } + + intel_ring_advance(rq, cs); + *offset += i * sizeof(u32); + + return 0; +} + +static int check_mocs_table(struct intel_engine_cs *engine, + const struct drm_i915_mocs_table *table, + const u32 *vaddr, int *offset) +{ + unsigned int i; + u32 expect; + + for (i = 0; i < table->size; i++) { + if (HAS_GLOBAL_MOCS_REGISTERS(engine->i915)) + expect = table->table[i].control_value; + else + expect = get_entry_control(table, i); + if (vaddr[*offset] != expect) { + pr_err("%s: Invalid MOCS[%d] entry, found %08x, expected %08x\n", + engine->name, i, vaddr[*offset], expect); + return -EINVAL; + } + ++*offset; + } + + /* All remaining entries are default */ + if (HAS_GLOBAL_MOCS_REGISTERS(engine->i915)) + expect = table->table[0].control_value; + else + expect = table->table[I915_MOCS_PTE].control_value; + for (; i < table->n_entries; i++) { + if (vaddr[*offset] != expect) { + pr_err("%s: Invalid MOCS[%d*] entry, found %08x, expected %08x\n", + engine->name, i, vaddr[*offset], expect); + return -EINVAL; + } + ++*offset; + } + + return 0; +} + +static int check_l3cc_table(struct intel_engine_cs *engine, + const struct drm_i915_mocs_table *table, + const u32 *vaddr, int *offset) +{ + u16 unused_value = table->table[I915_MOCS_PTE].l3cc_value; + unsigned int i; + u32 expect; + + if (1) { /* XXX skip MCR read back */ + *offset += table->n_entries / 2; + return 0; + } + + for (i = 0; i < table->size / 2; i++) { + u16 low = get_entry_l3cc(table, 2 * i); + u16 high = get_entry_l3cc(table, 2 * i + 1); + + expect = l3cc_combine(table, low, high); + if (vaddr[*offset] != expect) { + pr_err("%s: Invalid L3CC[%d] entry, found %08x, expected %08x\n", + engine->name, i, vaddr[*offset], expect); + return -EINVAL; + } + ++*offset; + } + + /* Odd table size - 1 left over */ + if (table->size & 1) { + u16 low = get_entry_l3cc(table, 2 * i); + + expect = l3cc_combine(table, low, unused_value); + if (vaddr[*offset] != expect) { + pr_err("%s: Invalid L3CC[%d] entry, found %08x, expected %08x\n", + engine->name, i, vaddr[*offset], expect); + return -EINVAL; + } + ++*offset; + i++; + } + + /* All remaining entries are also unused */ + for (; i < table->n_entries / 2; i++) { + expect = l3cc_combine(table, unused_value, unused_value); + if (vaddr[*offset] != expect) { + pr_err("%s: Invalid L3CC[%d] entry, found %08x, expected %08x\n", + engine->name, i, vaddr[*offset], expect); + return -EINVAL; + } + ++*offset; + } + + return 0; +} + +static int check_mocs_engine(struct live_mocs *arg, + struct intel_context *ce) +{ + struct i915_vma *vma = arg->scratch; + struct i915_request *rq; + int offset; + int err; + + memset32(arg->vaddr, STACK_MAGIC, PAGE_SIZE / sizeof(u32)); + + rq = intel_context_create_request(ce); + if (IS_ERR(rq)) + return PTR_ERR(rq); + + i915_vma_lock(vma); + err = i915_request_await_object(rq, vma->obj, true); + if (!err) + err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); + i915_vma_unlock(vma); + + offset = 0; + if (!err) + err = read_mocs_table(rq, &arg->table, vma, &offset); + if (!err && ce->engine->class == RENDER_CLASS) + err = read_l3cc_table(rq, &arg->table, vma, &offset); + + err = request_add_sync(rq, err); + if (err) + return err; + + offset = 0; + if (!err) + err = check_mocs_table(ce->engine, &arg->table, + arg->vaddr, &offset); + if (!err && ce->engine->class == RENDER_CLASS) + err = check_l3cc_table(ce->engine, &arg->table, + arg->vaddr, &offset); + if (err) + return err; + + return 0; +} + +static int live_mocs_clean(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct live_mocs mocs; + int err; + + err = live_mocs_init(&mocs, gt); + if (err) + return err; + + for_each_engine(engine, gt, id) { + struct intel_context *ce; + + ce = intel_context_create(engine->kernel_context->gem_context, + engine); + if (IS_ERR(ce)) { + err = PTR_ERR(ce); + break; + } + + err = check_mocs_engine(&mocs, ce); + intel_context_put(ce); + if (err) + break; + } + + live_mocs_fini(&mocs); + + return err; +} + +static int active_engine_reset(struct intel_context *ce, + const char *reason) +{ + struct igt_spinner spin; + struct i915_request *rq; + int err; + + err = igt_spinner_init(&spin, ce->engine->gt); + if (err) + return err; + + rq = igt_spinner_create_request(&spin, ce, MI_NOOP); + if (IS_ERR(rq)) { + igt_spinner_fini(&spin); + return PTR_ERR(rq); + } + + err = request_add_spin(rq, &spin); + if (err == 0) + err = intel_engine_reset(ce->engine, reason); + + igt_spinner_end(&spin); + igt_spinner_fini(&spin); + + return err; +} + +static int __live_mocs_reset(struct live_mocs *mocs, + struct intel_context *ce) +{ + int err; + + err = intel_engine_reset(ce->engine, "mocs"); + if (err) + return err; + + err = check_mocs_engine(mocs, ce); + if (err) + return err; + + err = active_engine_reset(ce, "mocs"); + if (err) + return err; + + err = check_mocs_engine(mocs, ce); + if (err) + return err; + + return 0; +} + +static int live_mocs_reset(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct live_mocs mocs; + int err = 0; + + if (!intel_has_reset_engine(gt)) + return 0; + + err = live_mocs_init(&mocs, gt); + if (err) + return err; + + igt_global_reset_lock(gt); + for_each_engine(engine, gt, id) { + struct intel_context *ce; + + ce = intel_context_create(engine->kernel_context->gem_context, + engine); + if (IS_ERR(ce)) { + err = PTR_ERR(ce); + break; + } + + intel_engine_pm_get(engine); + err = __live_mocs_reset(&mocs, ce); + intel_engine_pm_put(engine); + + intel_context_put(ce); + if (err) + break; + } + igt_global_reset_unlock(gt); + + live_mocs_fini(&mocs); + return err; +} + +int intel_mocs_live_selftests(struct drm_i915_private *i915) +{ + static const struct i915_subtest tests[] = { + SUBTEST(live_mocs_clean), + SUBTEST(live_mocs_reset), + }; + struct drm_i915_mocs_table table; + + if (!get_mocs_settings(i915, &table)) + return 0; + + return intel_gt_live_subtests(tests, &i915->gt); +} diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h index 6daf6599ec79..1a6abcffce81 100644 --- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h +++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h @@ -16,6 +16,7 @@ selftest(gt_engines, intel_engine_live_selftests) selftest(gt_timelines, intel_timeline_live_selftests) selftest(gt_contexts, intel_context_live_selftests) selftest(gt_lrc, intel_lrc_live_selftests) +selftest(gt_mocs, intel_mocs_live_selftests) selftest(gt_pm, intel_gt_pm_live_selftests) selftest(requests, i915_request_live_selftests) selftest(active, i915_active_live_selftests)