From patchwork Wed May 7 17:27:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 4130861 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D79C89F3EE for ; Wed, 7 May 2014 17:27:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1BC0A20251 for ; Wed, 7 May 2014 17:27:43 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 3A59820259 for ; Wed, 7 May 2014 17:27:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BFFCA6ED6C; Wed, 7 May 2014 10:27:41 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail.bwidawsk.net (bwidawsk.net [166.78.191.112]) by gabe.freedesktop.org (Postfix) with ESMTP id ED5616ED71 for ; Wed, 7 May 2014 10:27:39 -0700 (PDT) Received: by mail.bwidawsk.net (Postfix, from userid 5001) id 4D5D058077; Wed, 7 May 2014 10:27:39 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from ironside.intel.com (c-24-21-100-90.hsd1.or.comcast.net [24.21.100.90]) by mail.bwidawsk.net (Postfix) with ESMTPSA id 3C29F5806F; Wed, 7 May 2014 10:27:17 -0700 (PDT) From: Ben Widawsky To: Intel GFX Date: Wed, 7 May 2014 10:27:04 -0700 Message-Id: <1399483626-7540-9-git-send-email-benjamin.widawsky@intel.com> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1399483626-7540-1-git-send-email-benjamin.widawsky@intel.com> References: <1399483626-7540-1-git-send-email-benjamin.widawsky@intel.com> Cc: Ben Widawsky , Ben Widawsky Subject: [Intel-gfx] [PATCH 08/10] drm/i915: semaphore debugfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Simple debugfs file to display the current state of semaphores. This is useful if you want to see the state without hanging the GPU. NOTE: This patch is optional to the series. NOTE2: Like the GPU error state collection, the reads are currently incoherent. Signed-off-by: Ben Widawsky --- drivers/gpu/drm/i915/i915_debugfs.c | 70 +++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 18b3565..d9c1414 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2335,6 +2335,75 @@ static int i915_display_info(struct seq_file *m, void *unused) return 0; } +static int i915_semaphore_status(struct seq_file *m, void *unused) +{ + struct drm_info_node *node = (struct drm_info_node *) m->private; + struct drm_device *dev = node->minor->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring; + int i, j, ret; + + if (!i915_semaphore_is_enabled(dev)) { + seq_puts(m, "Semaphores are disabled\n"); + return 0; + } + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + + if (IS_BROADWELL(dev)) { + struct page *page; + uint64_t *seqno; + + page = i915_gem_object_get_page(dev_priv->semaphore_obj, 0); + + seqno = (uint64_t *)kmap_atomic(page); + for_each_ring(ring, dev_priv, i) { + uint64_t offset; + + seq_printf(m, "%s\n", ring->name); + + seq_puts(m, " Last signal:"); + for (j = 0; j < I915_NUM_RINGS; j++) { + offset = i * I915_NUM_RINGS + j; + seq_printf(m, "0x%08llx (0x%02llx) ", + seqno[offset], offset * 8); + } + seq_putc(m, '\n'); + + seq_puts(m, " Last wait: "); + for (j = 0; j < I915_NUM_RINGS; j++) { + offset = i + (j * I915_NUM_RINGS); + seq_printf(m, "0x%08llx (0x%02llx) ", + seqno[offset], offset * 8); + } + seq_putc(m, '\n'); + + } + kunmap_atomic(seqno); + } else { + seq_puts(m, " Last signal:"); + for_each_ring(ring, dev_priv, i) + for (j = 0; j < I915_NUM_RINGS; j++) + seq_printf(m, "0x%08x\n", + I915_READ(ring->semaphore.mbox.signal[j])); + seq_putc(m, '\n'); + } + + seq_puts(m, "\nSync seqno:\n"); + for_each_ring(ring, dev_priv, i) { + for (j = 0; j < I915_NUM_RINGS - 1; j++) { + seq_printf(m, " 0x%08x ", ring->semaphore.sync_seqno[j]); + } + seq_putc(m, '\n'); + } + seq_putc(m, '\n'); + + mutex_unlock(&dev->struct_mutex); + return 0; +} + struct pipe_crc_info { const char *name; struct drm_device *dev; @@ -3781,6 +3850,7 @@ static const struct drm_info_list i915_debugfs_list[] = { {"i915_pc8_status", i915_pc8_status, 0}, {"i915_power_domain_info", i915_power_domain_info, 0}, {"i915_display_info", i915_display_info, 0}, + {"i915_semaphore_status", i915_semaphore_status, 0}, }; #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)