From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36EC7C4338F for ; Mon, 16 Aug 2021 13:57:34 +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 08FCD632E0 for ; Mon, 16 Aug 2021 13:57:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 08FCD632E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 09FD689F2E; Mon, 16 Aug 2021 13:57:14 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0A15589F06; Mon, 16 Aug 2021 13:57:03 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10077"; a="279607078" X-IronPort-AV: E=Sophos;i="5.84,326,1620716400"; d="scan'208";a="279607078" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2021 06:56:59 -0700 X-IronPort-AV: E=Sophos;i="5.84,326,1620716400"; d="scan'208";a="441091180" Received: from jons-linux-dev-box.fm.intel.com ([10.1.27.20]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2021 06:56:59 -0700 From: Matthew Brost To: , Cc: Date: Mon, 16 Aug 2021 06:51:31 -0700 Message-Id: <20210816135139.10060-15-matthew.brost@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210816135139.10060-1-matthew.brost@intel.com> References: <20210816135139.10060-1-matthew.brost@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH 14/22] drm/i915: Allocate error capture in atomic context X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" Error captures can now be done in a work queue processing G2H messages. These messages need to be completely done being processed in the reset path, to avoid races in the missing G2H cleanup, which create a dependency on memory allocations and dma fences (i915_requests). Requests depend on resets, thus now we have a circular dependency. To work around this, allocate the error capture in an atomic context. Fixes: dc0dad365c5e ("Fix for error capture after full GPU reset with GuC") Fixes: 573ba126aef3 ("Capture error state on context reset") Signed-off-by: Matthew Brost --- drivers/gpu/drm/i915/i915_gpu_error.c | 37 +++++++++++++-------------- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 0f08bcfbe964..453376aa6d9f 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -49,7 +49,6 @@ #include "i915_memcpy.h" #include "i915_scatterlist.h" -#define ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN) #define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN) static void __sg_set_buf(struct scatterlist *sg, @@ -79,7 +78,7 @@ static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len) if (e->cur == e->end) { struct scatterlist *sgl; - sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL); + sgl = (typeof(sgl))__get_free_page(ATOMIC_MAYFAIL); if (!sgl) { e->err = -ENOMEM; return false; @@ -99,10 +98,10 @@ static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len) } e->size = ALIGN(len + 1, SZ_64K); - e->buf = kmalloc(e->size, ALLOW_FAIL); + e->buf = kmalloc(e->size, ATOMIC_MAYFAIL); if (!e->buf) { e->size = PAGE_ALIGN(len + 1); - e->buf = kmalloc(e->size, GFP_KERNEL); + e->buf = kmalloc(e->size, ATOMIC_MAYFAIL); } if (!e->buf) { e->err = -ENOMEM; @@ -243,12 +242,12 @@ static bool compress_init(struct i915_vma_compress *c) { struct z_stream_s *zstream = &c->zstream; - if (pool_init(&c->pool, ALLOW_FAIL)) + if (pool_init(&c->pool, ATOMIC_MAYFAIL)) return false; zstream->workspace = kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL), - ALLOW_FAIL); + ATOMIC_MAYFAIL); if (!zstream->workspace) { pool_fini(&c->pool); return false; @@ -256,7 +255,7 @@ static bool compress_init(struct i915_vma_compress *c) c->tmp = NULL; if (i915_has_memcpy_from_wc()) - c->tmp = pool_alloc(&c->pool, ALLOW_FAIL); + c->tmp = pool_alloc(&c->pool, ATOMIC_MAYFAIL); return true; } @@ -280,7 +279,7 @@ static void *compress_next_page(struct i915_vma_compress *c, if (dst->page_count >= dst->num_pages) return ERR_PTR(-ENOSPC); - page = pool_alloc(&c->pool, ALLOW_FAIL); + page = pool_alloc(&c->pool, ATOMIC_MAYFAIL); if (!page) return ERR_PTR(-ENOMEM); @@ -376,7 +375,7 @@ struct i915_vma_compress { static bool compress_init(struct i915_vma_compress *c) { - return pool_init(&c->pool, ALLOW_FAIL) == 0; + return pool_init(&c->pool, ATOMIC_MAYFAIL) == 0; } static bool compress_start(struct i915_vma_compress *c) @@ -391,7 +390,7 @@ static int compress_page(struct i915_vma_compress *c, { void *ptr; - ptr = pool_alloc(&c->pool, ALLOW_FAIL); + ptr = pool_alloc(&c->pool, ATOMIC_MAYFAIL); if (!ptr) return -ENOMEM; @@ -997,7 +996,7 @@ i915_vma_coredump_create(const struct intel_gt *gt, num_pages = min_t(u64, vma->size, vma->obj->base.size) >> PAGE_SHIFT; num_pages = DIV_ROUND_UP(10 * num_pages, 8); /* worstcase zlib growth */ - dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), ALLOW_FAIL); + dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), ATOMIC_MAYFAIL); if (!dst) return NULL; @@ -1433,7 +1432,7 @@ capture_engine(struct intel_engine_cs *engine, struct i915_request *rq = NULL; unsigned long flags; - ee = intel_engine_coredump_alloc(engine, GFP_KERNEL); + ee = intel_engine_coredump_alloc(engine, ATOMIC_MAYFAIL); if (!ee) return NULL; @@ -1481,7 +1480,7 @@ gt_record_engines(struct intel_gt_coredump *gt, struct intel_engine_coredump *ee; /* Refill our page pool before entering atomic section */ - pool_refill(&compress->pool, ALLOW_FAIL); + pool_refill(&compress->pool, ATOMIC_MAYFAIL); ee = capture_engine(engine, compress); if (!ee) @@ -1507,7 +1506,7 @@ gt_record_uc(struct intel_gt_coredump *gt, const struct intel_uc *uc = >->_gt->uc; struct intel_uc_coredump *error_uc; - error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL); + error_uc = kzalloc(sizeof(*error_uc), ATOMIC_MAYFAIL); if (!error_uc) return NULL; @@ -1518,8 +1517,8 @@ gt_record_uc(struct intel_gt_coredump *gt, * As modparams are generally accesible from the userspace make * explicit copies of the firmware paths. */ - error_uc->guc_fw.path = kstrdup(uc->guc.fw.path, ALLOW_FAIL); - error_uc->huc_fw.path = kstrdup(uc->huc.fw.path, ALLOW_FAIL); + error_uc->guc_fw.path = kstrdup(uc->guc.fw.path, ATOMIC_MAYFAIL); + error_uc->huc_fw.path = kstrdup(uc->huc.fw.path, ATOMIC_MAYFAIL); error_uc->guc_log = i915_vma_coredump_create(gt->_gt, uc->guc.log.vma, "GuC log buffer", @@ -1778,7 +1777,7 @@ i915_vma_capture_prepare(struct intel_gt_coredump *gt) { struct i915_vma_compress *compress; - compress = kmalloc(sizeof(*compress), ALLOW_FAIL); + compress = kmalloc(sizeof(*compress), ATOMIC_MAYFAIL); if (!compress) return NULL; @@ -1811,11 +1810,11 @@ i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask) if (IS_ERR(error)) return error; - error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL); + error = i915_gpu_coredump_alloc(i915, ATOMIC_MAYFAIL); if (!error) return ERR_PTR(-ENOMEM); - error->gt = intel_gt_coredump_alloc(gt, ALLOW_FAIL); + error->gt = intel_gt_coredump_alloc(gt, ATOMIC_MAYFAIL); if (error->gt) { struct i915_vma_compress *compress; -- 2.32.0