From patchwork Tue Feb 25 04:43:08 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 13989291 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B1062C021B2 for ; Tue, 25 Feb 2025 04:42:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CB41F10E571; Tue, 25 Feb 2025 04:42:24 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="bmD2g4/U"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2AB3F10E54F; Tue, 25 Feb 2025 04:42:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1740458536; x=1771994536; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=LHOiJRjL5fOPXshB0W8pfiD3iVoer7UU03adcIy5ZzA=; b=bmD2g4/UWGrIIRGUXW95YG+JIDVgDey93q1exE+bCBTr4c2eMT+6tarw cpMouIdoCU1NxEoddbns6IqhiOT/PaBwJXCCY3hmLBtj+2rLL7v6DzPjU TEdLpfSQBmWAhjZQlLtrYK51eZn07jmHL/6FcF61/i9N581ZMkBFGpc+V OX5NAjoj6l3UPpVNGigKGT67ewwMOE1rpM0hXGlgk7HHALrZTRD4EVXAn NT4csSxgs4l9dHESUH8Dx8ukjmjgSuMyO1ds1f9OCS3aaiAXIe+Lr/4kb 5yWrvpb2RalWcmS2hYLSFwN0nSifpuieuZMOwtkCCmcJBSkAs852iRWkz g==; X-CSE-ConnectionGUID: a6WI5w/eTsu3cTz4fMsPDA== X-CSE-MsgGUID: ExHMJRtmSgWaDXlX2JtBjA== X-IronPort-AV: E=McAfee;i="6700,10204,11355"; a="51885078" X-IronPort-AV: E=Sophos;i="6.13,313,1732608000"; d="scan'208";a="51885078" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Feb 2025 20:42:16 -0800 X-CSE-ConnectionGUID: M1MOl77tTEqw4l6f8O0VUQ== X-CSE-MsgGUID: vjZq9BYzTcyH6LeHhGp5Kg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,313,1732608000"; d="scan'208";a="116290332" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Feb 2025 20:42:15 -0800 From: Matthew Brost To: intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: himal.prasad.ghimiray@intel.com, apopple@nvidia.com, airlied@gmail.com, thomas.hellstrom@linux.intel.com, simona.vetter@ffwll.ch, felix.kuehling@amd.com, dakr@kernel.org Subject: [PATCH v6 29/32] drm/xe: Add SVM debug Date: Mon, 24 Feb 2025 20:43:08 -0800 Message-Id: <20250225044311.3178695-30-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250225044311.3178695-1-matthew.brost@intel.com> References: <20250225044311.3178695-1-matthew.brost@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add some useful SVM debug logging fro SVM range which prints the range's state. v2: - Update logging with latest structure layout v3: - Better commit message (Thomas) - New range structure (Thomas) - s/COLLECTOT/s/COLLECTOR (Thomas) v4: - Drop partial evict message (Thomas) - Use %p for pointers print (Thomas) v6: - Cast dma_addr to u64 (CI) - Only compile if CONFIG_DRM_GPUSVM selected (CI, Lucas) Signed-off-by: Matthew Brost Reviewed-by: Thomas Hellström Reviewed-by: Himal Prasad Ghimiray --- drivers/gpu/drm/xe/xe_pt.c | 8 ++++ drivers/gpu/drm/xe/xe_svm.c | 84 +++++++++++++++++++++++++++++++++---- drivers/gpu/drm/xe/xe_svm.h | 7 ++++ 3 files changed, 92 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c index f8d06c70f77d..29ade504e1c1 100644 --- a/drivers/gpu/drm/xe/xe_pt.c +++ b/drivers/gpu/drm/xe/xe_pt.c @@ -647,6 +647,7 @@ xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma, /* Move this entire thing to xe_svm.c? */ xe_svm_notifier_lock(xe_vma_vm(vma)); if (!xe_svm_range_pages_valid(range)) { + xe_svm_range_debug(range, "BIND PREPARE - RETRY"); xe_svm_notifier_unlock(xe_vma_vm(vma)); return -EAGAIN; } @@ -655,6 +656,10 @@ xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma, range->base.itree.last + 1 - range->base.itree.start, &curs); is_devmem = xe_res_is_vram(&curs); + if (is_devmem) + xe_svm_range_debug(range, "BIND PREPARE - DMA VRAM"); + else + xe_svm_range_debug(range, "BIND PREPARE - DMA"); } else { xe_assert(xe, false); } @@ -1429,10 +1434,13 @@ static int xe_pt_svm_pre_commit(struct xe_migrate_pt_update *pt_update) if (op->subop == XE_VMA_SUBOP_UNMAP_RANGE) continue; + xe_svm_range_debug(range, "PRE-COMMIT"); + xe_assert(vm->xe, xe_vma_is_cpu_addr_mirror(op->map_range.vma)); xe_assert(vm->xe, op->subop == XE_VMA_SUBOP_MAP_RANGE); if (!xe_svm_range_pages_valid(range)) { + xe_svm_range_debug(range, "PRE-COMMIT - RETRY"); xe_svm_notifier_unlock(vm); return -EAGAIN; } diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c index e2f76692adc0..546336a0ab2a 100644 --- a/drivers/gpu/drm/xe/xe_svm.c +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -12,6 +12,18 @@ #include "xe_vm.h" #include "xe_vm_types.h" +static bool xe_svm_range_in_vram(struct xe_svm_range *range) +{ + /* Not reliable without notifier lock */ + return range->base.flags.has_devmem_pages; +} + +static bool xe_svm_range_has_vram_binding(struct xe_svm_range *range) +{ + /* Not reliable without notifier lock */ + return xe_svm_range_in_vram(range) && range->tile_present; +} + static struct xe_vm *gpusvm_to_vm(struct drm_gpusvm *gpusvm) { return container_of(gpusvm, struct xe_vm, svm.gpusvm); @@ -37,6 +49,23 @@ static unsigned long xe_svm_range_size(struct xe_svm_range *range) return drm_gpusvm_range_size(&range->base); } +#define range_debug(r__, operaton__) \ + vm_dbg(&range_to_vm(&(r__)->base)->xe->drm, \ + "%s: asid=%u, gpusvm=%p, vram=%d,%d, seqno=%lu, " \ + "start=0x%014lx, end=0x%014lx, size=%lu", \ + (operaton__), range_to_vm(&(r__)->base)->usm.asid, \ + (r__)->base.gpusvm, \ + xe_svm_range_in_vram((r__)) ? 1 : 0, \ + xe_svm_range_has_vram_binding((r__)) ? 1 : 0, \ + (r__)->base.notifier_seq, \ + xe_svm_range_start((r__)), xe_svm_range_end((r__)), \ + xe_svm_range_size((r__))) + +void xe_svm_range_debug(struct xe_svm_range *range, const char *operation) +{ + range_debug(range, operation); +} + static void *xe_svm_devm_owner(struct xe_device *xe) { return xe; @@ -74,6 +103,8 @@ xe_svm_garbage_collector_add_range(struct xe_vm *vm, struct xe_svm_range *range, { struct xe_device *xe = vm->xe; + range_debug(range, "GARBAGE COLLECTOR ADD"); + drm_gpusvm_range_set_unmapped(&range->base, mmu_range); spin_lock(&vm->svm.garbage_collector.lock); @@ -99,10 +130,14 @@ xe_svm_range_notifier_event_begin(struct xe_vm *vm, struct drm_gpusvm_range *r, xe_svm_assert_in_notifier(vm); + range_debug(range, "NOTIFIER"); + /* Skip if already unmapped or if no binding exist */ if (range->base.flags.unmapped || !range->tile_present) return 0; + range_debug(range, "NOTIFIER - EXECUTE"); + /* Adjust invalidation to range boundaries */ *adj_start = min(xe_svm_range_start(range), mmu_range->start); *adj_end = max(xe_svm_range_end(range), mmu_range->end); @@ -153,6 +188,11 @@ static void xe_svm_invalidate(struct drm_gpusvm *gpusvm, xe_svm_assert_in_notifier(vm); + vm_dbg(&gpusvm_to_vm(gpusvm)->xe->drm, + "INVALIDATE: asid=%u, gpusvm=%p, seqno=%lu, start=0x%016lx, end=0x%016lx, event=%d", + vm->usm.asid, gpusvm, notifier->notifier.invalidate_seq, + mmu_range->start, mmu_range->end, mmu_range->event); + /* Adjust invalidation to notifier boundaries */ adj_start = max(drm_gpusvm_notifier_start(notifier), adj_start); adj_end = min(drm_gpusvm_notifier_end(notifier), adj_end); @@ -237,6 +277,8 @@ static int __xe_svm_garbage_collector(struct xe_vm *vm, { struct dma_fence *fence; + range_debug(range, "GARBAGE COLLECTOR"); + xe_vm_lock(vm, false); fence = xe_vm_range_unbind(vm, range); xe_vm_unlock(vm); @@ -396,16 +438,23 @@ static int xe_svm_copy(struct page **pages, dma_addr_t *dma_addr, int incr = (match && last) ? 1 : 0; if (vram_addr != XE_VRAM_ADDR_INVALID) { - if (sram) + if (sram) { + vm_dbg(&tile->xe->drm, + "COPY TO SRAM - 0x%016llx -> 0x%016llx, NPAGES=%ld", + vram_addr, (u64)dma_addr[pos], i - pos + incr); __fence = xe_migrate_from_vram(tile->migrate, i - pos + incr, vram_addr, dma_addr + pos); - else + } else { + vm_dbg(&tile->xe->drm, + "COPY TO VRAM - 0x%016llx -> 0x%016llx, NPAGES=%ld", + (u64)dma_addr[pos], vram_addr, i - pos + incr); __fence = xe_migrate_to_vram(tile->migrate, i - pos + incr, dma_addr + pos, vram_addr); + } if (IS_ERR(__fence)) { err = PTR_ERR(__fence); goto err_out; @@ -425,14 +474,21 @@ static int xe_svm_copy(struct page **pages, dma_addr_t *dma_addr, /* Extra mismatched device page, copy it */ if (!match && last && vram_addr != XE_VRAM_ADDR_INVALID) { - if (sram) + if (sram) { + vm_dbg(&tile->xe->drm, + "COPY TO SRAM - 0x%016llx -> 0x%016llx, NPAGES=%d", + vram_addr, (u64)dma_addr[pos], 1); __fence = xe_migrate_from_vram(tile->migrate, 1, vram_addr, dma_addr + pos); - else + } else { + vm_dbg(&tile->xe->drm, + "COPY TO VRAM - 0x%016llx -> 0x%016llx, NPAGES=%d", + (u64)dma_addr[pos], vram_addr, 1); __fence = xe_migrate_to_vram(tile->migrate, 1, dma_addr + pos, vram_addr); + } if (IS_ERR(__fence)) { err = PTR_ERR(__fence); goto err_out; @@ -609,6 +665,8 @@ static int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile, ktime_t end = 0; int err; + range_debug(range, "ALLOCATE VRAM"); + if (!mmget_not_zero(mm)) return -EFAULT; mmap_read_lock(mm); @@ -699,6 +757,8 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, if (xe_svm_range_is_valid(range, tile)) return 0; + range_debug(range, "PAGE FAULT"); + /* XXX: Add migration policy, for now migrate range once */ if (!range->skip_migrate && range->base.flags.migrate_devmem && xe_svm_range_size(range) >= SZ_64K) { @@ -714,18 +774,26 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, } } + range_debug(range, "GET PAGES"); err = drm_gpusvm_range_get_pages(&vm->svm.gpusvm, r, &ctx); /* Corner where CPU mappings have changed */ if (err == -EOPNOTSUPP || err == -EFAULT || err == -EPERM) { - if (err == -EOPNOTSUPP) + if (err == -EOPNOTSUPP) { + range_debug(range, "PAGE FAULT - EVICT PAGES"); drm_gpusvm_range_evict(&vm->svm.gpusvm, &range->base); + } drm_dbg(&vm->xe->drm, "Get pages failed, falling back to retrying, asid=%u, gpusvm=%p, errno %pe\n", vm->usm.asid, &vm->svm.gpusvm, ERR_PTR(err)); + range_debug(range, "PAGE FAULT - RETRY PAGES"); goto retry; } - if (err) + if (err) { + range_debug(range, "PAGE FAULT - FAIL PAGE COLLECT"); goto err_out; + } + + range_debug(range, "PAGE FAULT - BIND"); retry_bind: drm_exec_init(&exec, 0, 0); @@ -741,8 +809,10 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, if (IS_ERR(fence)) { drm_exec_fini(&exec); err = PTR_ERR(fence); - if (err == -EAGAIN) + if (err == -EAGAIN) { + range_debug(range, "PAGE FAULT - RETRY BIND"); goto retry; + } if (xe_vm_validate_should_retry(&exec, err, &end)) goto retry_bind; goto err_out; diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h index 855aa8e1dd38..e059590e5076 100644 --- a/drivers/gpu/drm/xe/xe_svm.h +++ b/drivers/gpu/drm/xe/xe_svm.h @@ -70,6 +70,8 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end); int xe_svm_bo_evict(struct xe_bo *bo); + +void xe_svm_range_debug(struct xe_svm_range *range, const char *operation); #else static inline bool xe_svm_range_pages_valid(struct xe_svm_range *range) { @@ -117,6 +119,11 @@ int xe_svm_bo_evict(struct xe_bo *bo) { return 0; } + +static inline +void xe_svm_range_debug(struct xe_svm_range *range, const char *operation) +{ +} #endif /**