From 8b78f0e588e22c3d5a8cd3ac260023ae7f942828 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Thu, 26 Dec 2013 13:39:50 -0800 Subject: drm/i915: Clarify relocation errnos While trying to find a random -EINVAL from a failing test, I noticed we had a few hard to follow return values. The first two hunks in this patch replace completely useless initialization of ret. The last several hunks help to distinguish between altering 'return ret' and 'return ' Signed-off-by: Ben Widawsky Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 8d795626a25e..d269ecf46e26 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -252,7 +252,7 @@ relocate_entry_cpu(struct drm_i915_gem_object *obj, struct drm_device *dev = obj->base.dev; uint32_t page_offset = offset_in_page(reloc->offset); char *vaddr; - int ret = -EINVAL; + int ret; ret = i915_gem_object_set_to_cpu_domain(obj, true); if (ret) @@ -287,7 +287,7 @@ relocate_entry_gtt(struct drm_i915_gem_object *obj, struct drm_i915_private *dev_priv = dev->dev_private; uint32_t __iomem *reloc_entry; void __iomem *reloc_page; - int ret = -EINVAL; + int ret; ret = i915_gem_object_set_to_gtt_domain(obj, true); if (ret) @@ -335,7 +335,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, struct drm_i915_gem_object *target_i915_obj; struct i915_vma *target_vma; uint32_t target_offset; - int ret = -EINVAL; + int ret; /* we've already hold a reference to all valid objects */ target_vma = eb_get_vma(eb, reloc->target_handle); @@ -365,7 +365,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, (int) reloc->offset, reloc->read_domains, reloc->write_domain); - return ret; + return -EINVAL; } if (unlikely((reloc->write_domain | reloc->read_domains) & ~I915_GEM_GPU_DOMAINS)) { @@ -376,7 +376,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, (int) reloc->offset, reloc->read_domains, reloc->write_domain); - return ret; + return -EINVAL; } target_obj->pending_read_domains |= reloc->read_domains; @@ -396,14 +396,14 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, obj, reloc->target_handle, (int) reloc->offset, (int) obj->base.size); - return ret; + return -EINVAL; } if (unlikely(reloc->offset & 3)) { DRM_DEBUG("Relocation not 4-byte aligned: " "obj %p target %d offset %d.\n", obj, reloc->target_handle, (int) reloc->offset); - return ret; + return -EINVAL; } /* We can't wait for rendering with pagefaults disabled */ -- cgit v1.2.1 From f0a9f74c0d735bc1b5a2811fe73c99604394374e Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Tue, 17 Dec 2013 20:06:00 -0800 Subject: drm/i915: Fix disabled semaphores The ring will emit too many if semaphores are disabled since we do not add the correct number to num_dwords anymore. This was introduced: commit 52ed23253b68e1cf154b03d91bed619504cf955b Author: Ben Widawsky Date: Mon Dec 16 20:50:38 2013 -0800 drm/i915: Don't emit mbox updates without semaphores FWIW, the bug was fixed later in the series. /me hangs head in shame. Daniel: Also note that we should have merged the read-only semaphore modparam before this patch. Reported-by: Kenneth Graunke Signed-off-by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ringbuffer.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 8fcb32a02cb4..b7f1742caf87 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -673,10 +673,12 @@ gen6_add_request(struct intel_ring_buffer *ring) if (ret) return ret; - for_each_ring(useless, dev_priv, i) { - u32 mbox_reg = ring->signal_mbox[i]; - if (mbox_reg != GEN6_NOSYNC) - update_mboxes(ring, mbox_reg); + if (i915_semaphore_is_enabled(dev)) { + for_each_ring(useless, dev_priv, i) { + u32 mbox_reg = ring->signal_mbox[i]; + if (mbox_reg != GEN6_NOSYNC) + update_mboxes(ring, mbox_reg); + } } intel_ring_emit(ring, MI_STORE_DWORD_INDEX); -- cgit v1.2.1 From fae0ce15c29ecc19ec192566f61ccbffe4f25ed0 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Tue, 17 Dec 2013 15:06:42 -0800 Subject: drm/i915: Make semaphore modparam RO A couple patches in the upcoming rework of semaphores will break if semaphores are toggled by the user at various times. Since the code cleanups there seem to be an overall win, and toggling semaphores at runtime is not a terribly useful thing to do, simply make the module parameter read-only. Cc: Daniel Vetter Cc: Chris Wilson Signed-off-by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 43245b3fd2a2..c99f571f1e84 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -59,7 +59,7 @@ MODULE_PARM_DESC(powersave, "Enable powersavings, fbc, downclocking, etc. (default: true)"); int i915_semaphores __read_mostly = -1; -module_param_named(semaphores, i915_semaphores, int, 0600); +module_param_named(semaphores, i915_semaphores, int, 0400); MODULE_PARM_DESC(semaphores, "Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))"); -- cgit v1.2.1 From 8664850087deef3715c885529d94f9a82791de9c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 14 Jan 2014 11:40:54 +0100 Subject: drm/i915: Tune down reset_stat output from ERROR to debug This is user-triggerable and hence we should not allow it to spam dmesg. Also, it upsets the nice dmesg tracking piglit does. Note that this is just extra debugging information, mostly unwanted, in case of a hang and that there is a separate message to the user giving instructions on how to report a bug for a GPU hang. v2: Add note as suggests in Chris' reply. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72740 Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 32636a470367..51d4c1a0f544 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2330,7 +2330,7 @@ static void i915_set_reset_status(struct intel_ring_buffer *ring, if (ring->hangcheck.action != HANGCHECK_WAIT && i915_request_guilty(request, acthd, &inside)) { - DRM_ERROR("%s hung %s bo (0x%lx ctx %d) at 0x%x\n", + DRM_DEBUG("%s hung %s bo (0x%lx ctx %d) at 0x%x\n", ring->name, inside ? "inside" : "flushing", offset, -- cgit v1.2.1 From babb1903511f147b7c9ef3c06f13b036cac31997 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Tue, 14 Jan 2014 11:04:16 -0800 Subject: drm/i915/bdw: remove preliminary_hw_support flag from BDW It ought to work ok in 3.14. We have some fun stuff coming after that, but all the basics are in place now and seem relatively stable. Signed-off-by: Jesse Barnes Acked by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index c99f571f1e84..ca11cc854e78 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -341,7 +341,6 @@ static const struct intel_device_info intel_haswell_m_info = { }; static const struct intel_device_info intel_broadwell_d_info = { - .is_preliminary = 1, .gen = 8, .num_pipes = 3, .need_gfx_hws = 1, .has_hotplug = 1, .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, @@ -350,7 +349,6 @@ static const struct intel_device_info intel_broadwell_d_info = { }; static const struct intel_device_info intel_broadwell_m_info = { - .is_preliminary = 1, .gen = 8, .is_mobile = 1, .num_pipes = 3, .need_gfx_hws = 1, .has_hotplug = 1, .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, -- cgit v1.2.1 From 1fb2362b43371f35b98a55e615d990f96d8ac966 Mon Sep 17 00:00:00 2001 From: Kristen Carlson Accardi Date: Tue, 14 Jan 2014 15:36:15 -0800 Subject: i915: send D1 opregion notification The opregion notification for runtime suspend is currently D1, not D3. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index ca11cc854e78..04f1f02c4019 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -922,7 +922,15 @@ static int i915_runtime_suspend(struct device *device) del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); dev_priv->pm.suspended = true; - intel_opregion_notify_adapter(dev, PCI_D3cold); + + /* + * current versions of firmware which depend on this opregion + * notification have repurposed the D1 definition to mean + * "runtime suspended" vs. what you would normally expect (D3) + * to distinguish it from notifications that might be sent + * via the suspend path. + */ + intel_opregion_notify_adapter(dev, PCI_D1); return 0; } -- cgit v1.2.1 From 1d62beeaebf109e1b2b18f1b24ab3279f31aa649 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Wed, 1 Jan 2014 10:15:13 -0800 Subject: drm/i915/ppgtt: Defer request freeing on reset We need to defer the free request until the object/vma is capable of being freed - or else we have a problem when we try to destroy the context. The exact same issue is described and fixed here: commit e20780439b26ba95aeb29d3e27cd8cc32bc82a4c Author: Ben Widawsky Date: Fri Dec 6 14:11:22 2013 -0800 drm/i915: Defer request freeing I had this fix previously, but decided not to keep it for some reason I can no longer remember. gem_reset_stats is a really good test at hitting the problem. For the inquisitive: [ 170.516392] ------------[ cut here ]------------ [ 170.517227] WARNING: CPU: 1 PID: 105 at drivers/gpu/drm/drm_mm.c:578 drm_mm_takedown+0x2e/0x30 [drm]() [ 170.518064] Memory manager not clean during takedown. [ 170.518941] CPU: 1 PID: 105 Comm: kworker/1:1 Not tainted 3.13.0-rc4-BEN+ #28 [ 170.519787] Hardware name: Hewlett-Packard HP EliteBook 8470p/179B, BIOS 68ICF Ver. F.02 04/27/2012 [ 170.520662] Call Trace: [ 170.521517] [] dump_stack+0x4e/0x7a [ 170.522373] [] warn_slowpath_common+0x7d/0xa0 [ 170.523227] [] warn_slowpath_fmt+0x4c/0x50 [ 170.524079] [] drm_mm_takedown+0x2e/0x30 [drm] [ 170.524934] [] gen6_ppgtt_cleanup+0x23/0x110 [i915] [ 170.525777] [] ppgtt_release.part.5+0x24/0x29 [i915] [ 170.526603] [] i915_gem_context_free+0x195/0x1a0 [i915] [ 170.527423] [] i915_gem_free_request+0x9d/0xb0 [i915] [ 170.528247] [] i915_gem_reset+0x1f9/0x3f0 [i915] [ 170.529065] [] i915_reset+0x4e/0x180 [i915] [ 170.529870] [] i915_error_work_func+0xcd/0x120 [i915] [ 170.530666] [] process_one_work+0x1fa/0x6d0 [ 170.531453] [] ? process_one_work+0x198/0x6d0 [ 170.532230] [] worker_thread+0x11b/0x3a0 [ 170.532996] [] ? process_one_work+0x6d0/0x6d0 [ 170.533771] [] kthread+0xff/0x120 [ 170.534548] [] ? insert_kthread_work+0x80/0x80 [ 170.535322] [] ret_from_fork+0x7c/0xb0 [ 170.536089] [] ? insert_kthread_work+0x80/0x80 [ 170.536847] ---[ end trace 3d4c12892e42d58f ]--- v2: Whitespace fix. (Chris) Note: This is a bug that only hits the ppgtt topic branch but I've figured that doing the request cleanup in this order is generally the right thing to do. Signed-off-by: Ben Widawsky [danvet: Add a code comment to clarify what's actually going on since the lifetime rules aroung ppgtt cleanup are ... fuzzy a best atm. Also add a note about why we need this.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem.c | 27 +++++++++++++++++---------- 1 file changed, 17 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 51d4c1a0f544..4461336205ed 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2388,16 +2388,6 @@ static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv, static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, struct intel_ring_buffer *ring) { - while (!list_empty(&ring->request_list)) { - struct drm_i915_gem_request *request; - - request = list_first_entry(&ring->request_list, - struct drm_i915_gem_request, - list); - - i915_gem_free_request(request); - } - while (!list_empty(&ring->active_list)) { struct drm_i915_gem_object *obj; @@ -2407,6 +2397,23 @@ static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, i915_gem_object_move_to_inactive(obj); } + + /* + * We must free the requests after all the corresponding objects have + * been moved off active lists. Which is the same order as the normal + * retire_requests function does. This is important if object hold + * implicit references on things like e.g. ppgtt address spaces through + * the request. + */ + while (!list_empty(&ring->request_list)) { + struct drm_i915_gem_request *request; + + request = list_first_entry(&ring->request_list, + struct drm_i915_gem_request, + list); + + i915_gem_free_request(request); + } } void i915_gem_restore_fences(struct drm_device *dev) -- cgit v1.2.1 From bfbdb420f51457935784759ae5ef36b2257666a1 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 16 Jan 2014 19:56:53 +0200 Subject: drm/i915: g4x/vlv: fix dp aux interrupt mask Fix typo possibly leading to timed out DP aux transactions on ports C,D. Introduced in: Commmit 4aeebd7443e36b0a40032e518a9338f48bd27efc Author: Daniel Vetter Date: Thu Oct 31 09:53:36 2013 +0100 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72210 Signed off-by: Imre Deak Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 76126e0ae609..84365cd22092 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2138,7 +2138,8 @@ #define DP_AUX_CHANNEL_D_INT_STATUS_G4X (1 << 6) #define DP_AUX_CHANNEL_C_INT_STATUS_G4X (1 << 5) #define DP_AUX_CHANNEL_B_INT_STATUS_G4X (1 << 4) -#define DP_AUX_CHANNEL_MASK_INT_STATUS_G4X (1 << 4) +#define DP_AUX_CHANNEL_MASK_INT_STATUS_G4X (7 << 4) + /* SDVO is different across gen3/4 */ #define SDVOC_HOTPLUG_INT_STATUS_G4X (1 << 3) #define SDVOB_HOTPLUG_INT_STATUS_G4X (1 << 2) -- cgit v1.2.1 From dc5a43636c2fd50c694f16d042e0639fff5044fd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 16 Jan 2014 18:27:15 +0200 Subject: drm/i915: Eliminate lots of WARNs when there's no backlight present MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit My 855gm doesn't register the intel backlight but it still ends up calling the backlight code to enable/disable the backlight via the LVDS code. This leads to some WARNs due to backlight.max being 0. Let's have intel_panel_enable_backlight() and intel_panel_disable_backlight() check whether there's a backlight present or not. Also move the backlight.present check from asle_set_backlight() into intel_panel_set_backlight() for some extra symmetry. Signed-off-by: Ville Syrjälä Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_opregion.c | 10 ++-------- drivers/gpu/drm/i915/intel_panel.c | 6 +++--- 2 files changed, 5 insertions(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 3da259e280ba..37e9a96777ef 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -396,9 +396,7 @@ int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) { struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_connector *connector; struct intel_connector *intel_connector; - struct intel_panel *panel; struct opregion_asle __iomem *asle = dev_priv->opregion.asle; DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); @@ -417,12 +415,8 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) * only one). */ DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - intel_connector = to_intel_connector(connector); - panel = &intel_connector->panel; - if (panel->backlight.present) - intel_panel_set_backlight(intel_connector, bclp, 255); - } + list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) + intel_panel_set_backlight(intel_connector, bclp, 255); iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv); mutex_unlock(&dev->mode_config.mutex); diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 20ebc3e83d39..350de359123a 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -502,7 +502,7 @@ void intel_panel_set_backlight(struct intel_connector *connector, u32 level, u32 freq; unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; spin_lock_irqsave(&dev_priv->backlight_lock, flags); @@ -579,7 +579,7 @@ void intel_panel_disable_backlight(struct intel_connector *connector) enum pipe pipe = intel_get_pipe_from_connector(connector); unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; /* @@ -782,7 +782,7 @@ void intel_panel_enable_backlight(struct intel_connector *connector) enum pipe pipe = intel_get_pipe_from_connector(connector); unsigned long flags; - if (pipe == INVALID_PIPE) + if (!panel->backlight.present || pipe == INVALID_PIPE) return; DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); -- cgit v1.2.1 From 5d6a1116c6475404e6505b708320f9579ae19acd Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 16 Jan 2014 18:35:57 +0200 Subject: drm/i915: don't disable the DP port if the link is lost Currently if the DP link is lost (either because of a hot unplug, or failed link status check) we disable the DP port, but leave the rest of the pipe running. This is incompatible with the modeset disabling sequence of some platforms/configurations. At least this is the case for DP ports on the CPU as opposed to PCH. Atm we'll also get a warning when we do a modeset disable after the above link lost event, since we expect the DP port to be enabled at this point (see the bugzilla ticket for the related dmesg). Note that with this patch we'll still end up disabling the port, thanks to the HPD uevent and subsequent modeset disable. See also the next patch fixing the other half of this issue. Solution suggested by Ville. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70570 Signed-off-by: Imre Deak Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7df5085973e9..7b630e9a0115 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2891,13 +2891,11 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) /* Try to read receiver status if the link appears to be up */ if (!intel_dp_get_link_status(intel_dp, link_status)) { - intel_dp_link_down(intel_dp); return; } /* Now read the DPCD to see if it's actually running */ if (!intel_dp_get_dpcd(intel_dp)) { - intel_dp_link_down(intel_dp); return; } -- cgit v1.2.1 From 2e82a7203182d0883d0f9450d40ad6e1c6578ad9 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Fri, 17 Jan 2014 15:46:43 +0200 Subject: drm/i915: don't disable DP port after a failed link training Atm after a failed link training we disable the DP port. This can happen during a modeset-enable or a DP link re-establishment. The latter can be a problem and we shouldn't disable the DP port, see the previous patch for the reasoning. In the former case the right thing would be to disable the DP port, but also the rest of the pipe. As a stop-gap solution leave the DP port enabled in both cases. It is an improvement on its own (avoiding HW lock ups) and the proper solution for the first case requires a bigger change, so let's keep that on the TODO list. v2: - fix explanation of change impact (Chris) Suggested-by: Daniel Vetter Signed-off-by: Imre Deak Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7b630e9a0115..689b832f7551 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2638,7 +2638,6 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp) if (cr_tries > 5) { DRM_ERROR("failed to train DP, aborting\n"); - intel_dp_link_down(intel_dp); break; } -- cgit v1.2.1 From 5dce5b9387a06eb9301fa1cede07922a5a4d7a29 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 20 Jan 2014 10:17:36 +0000 Subject: drm/i915: Wait for completion of pending flips when starved of fences On older generations (gen2, gen3) the GPU requires fences for many operations, such as blits. The display hardware also requires fences for scanouts and this leads to a situation where an arbitrary number of fences may be pinned by old scanouts following a pageflip but before we have executed the unpin workqueue. This is unpredictable by userspace and leads to random EDEADLK when submitting an otherwise benign execbuffer. However, we can detect when we have an outstanding flip and so cause userspace to wait upon their completion before finally declaring that the system is starved of fences. This is really no worse than forcing the GPU to stall waiting for older execbuffer to retire and release their fences before we can reallocate them for the next execbuffer. v2: move the test for a pending fb unpin to a common routine for later reuse during eviction Reported-and-tested-by: dimon@gmx.net Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73696 Signed-off-by: Chris Wilson Reviewed-by: Jon Bloomfield Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem.c | 13 +++++++++---- drivers/gpu/drm/i915/intel_display.c | 24 ++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_drv.h | 1 + 3 files changed, 34 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 4461336205ed..00c836154725 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3106,7 +3106,7 @@ i915_find_fence_reg(struct drm_device *dev) } if (avail == NULL) - return NULL; + goto deadlock; /* None available, try to steal one or wait for a user to finish */ list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { @@ -3116,7 +3116,12 @@ i915_find_fence_reg(struct drm_device *dev) return reg; } - return NULL; +deadlock: + /* Wait for completion of pending flips which consume fences */ + if (intel_has_pending_fb_unpin(dev)) + return ERR_PTR(-EAGAIN); + + return ERR_PTR(-EDEADLK); } /** @@ -3161,8 +3166,8 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj) } } else if (enable) { reg = i915_find_fence_reg(dev); - if (reg == NULL) - return -EDEADLK; + if (IS_ERR(reg)) + return PTR_ERR(reg); if (reg->obj) { struct drm_i915_gem_object *old = reg->obj; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 14b024becb91..98371eeac77c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2982,6 +2982,30 @@ static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc) return pending; } +bool intel_has_pending_fb_unpin(struct drm_device *dev) +{ + struct intel_crtc *crtc; + + /* Note that we don't need to be called with mode_config.lock here + * as our list of CRTC objects is static for the lifetime of the + * device and so cannot disappear as we iterate. Similarly, we can + * happily treat the predicates as racy, atomic checks as userspace + * cannot claim and pin a new fb without at least acquring the + * struct_mutex and so serialising with us. + */ + list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) { + if (atomic_read(&crtc->unpin_work_count) == 0) + continue; + + if (crtc->unpin_work) + intel_wait_for_vblank(dev, crtc->pipe); + + return true; + } + + return false; +} + static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 8754db9e3d52..fbfaaba5cc3b 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -626,6 +626,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder, /* intel_display.c */ const char *intel_output_name(int output); +bool intel_has_pending_fb_unpin(struct drm_device *dev); int intel_pch_rawclk(struct drm_device *dev); void intel_mark_busy(struct drm_device *dev); void intel_mark_fb_busy(struct drm_i915_gem_object *obj, -- cgit v1.2.1 From 74e21ac2ccdc5e8f310d536ffe66d22571ece5c5 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 20 Jan 2014 10:17:37 +0000 Subject: drm/i915: Repeat evictions whilst pageflip completions are outstanding Since an old pageflip will keep its scanout buffer object pinned until it has executed its unpin task on the common workqueue, we can clog up our GGTT with stale pinned objects. As we cannot flush those workqueues without dropping our locks, we have to resort to falling back to userspace and telling them to repeat the operation in order to have a chance to run our workqueues and free up the required memory. If we fail, then we are forced to report ENOSPC back to userspace causing the operation to fail and best-case scenario is that it introduces temporary corruption. Signed-off-by: Chris Wilson Reviewed-by: Jon Bloomfield Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_evict.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c index 8f3adc7d0dc8..2ca280f9ee53 100644 --- a/drivers/gpu/drm/i915/i915_gem_evict.c +++ b/drivers/gpu/drm/i915/i915_gem_evict.c @@ -27,8 +27,10 @@ */ #include -#include "i915_drv.h" #include + +#include "i915_drv.h" +#include "intel_drv.h" #include "i915_trace.h" static bool @@ -53,6 +55,7 @@ i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm, struct list_head eviction_list, unwind_list; struct i915_vma *vma; int ret = 0; + int pass = 0; trace_i915_gem_evict(dev, min_size, alignment, mappable); @@ -119,14 +122,24 @@ none: /* Can we unpin some objects such as idle hw contents, * or pending flips? */ - ret = nonblocking ? -ENOSPC : i915_gpu_idle(dev); - if (ret) - return ret; + if (nonblocking) + return -ENOSPC; /* Only idle the GPU and repeat the search once */ - i915_gem_retire_requests(dev); - nonblocking = true; - goto search_again; + if (pass++ == 0) { + ret = i915_gpu_idle(dev); + if (ret) + return ret; + + i915_gem_retire_requests(dev); + goto search_again; + } + + /* If we still have pending pageflip completions, drop + * back to userspace to give our workqueues time to + * acquire our locks and unpin the old scanouts. + */ + return intel_has_pending_fb_unpin(dev) ? -EAGAIN : -ENOSPC; found: /* drm_mm doesn't allow any other other operations while -- cgit v1.2.1 From 431810112123bb26a0be39a99835861de9906abc Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Tue, 21 Jan 2014 14:42:38 -0800 Subject: drm/i915: Allow reading the TIMESTAMP register on Gen8. Nothing's changed here; we just need to bump the generation check. Signed-off-by: Kenneth Graunke Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_uncore.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 2c8143c37de3..87df68f5f504 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -805,7 +805,7 @@ static const struct register_whitelist { uint32_t size; uint32_t gen_bitmask; /* support gens, 0x10 for 4, 0x30 for 4 and 5, etc. */ } whitelist[] = { - { RING_TIMESTAMP(RENDER_RING_BASE), 8, 0xF0 }, + { RING_TIMESTAMP(RENDER_RING_BASE), 8, 0x1F0 }, }; int i915_reg_read_ioctl(struct drm_device *dev, -- cgit v1.2.1 From 232a6ee9af8adb185640f67fcaaa9014a9aa0573 Mon Sep 17 00:00:00 2001 From: Todd Previte Date: Thu, 23 Jan 2014 00:13:41 -0700 Subject: drm/i915: VLV2 - Fix hotplug detect bits Add new definitions for hotplug live status bits for VLV2 since they're in reverse order from the gen4x ones. Changelog: - Restored gen4 bit definitions - Added new definitions for VLV2 - Added platform check for IS_VALLEYVIEW() in dp_detect to use the correct bit defintions - Replaced a lost trailing brace for the added switch() Signed-off-by: Todd Previte Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73951 [danvet: Switch to _VLV postfix instead of prefix and regroupg comments again so that the g4x warning is right next to those defines. Also add a _G4X suffix for those special ones. Also cc stable.] Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 10 +++++++--- drivers/gpu/drm/i915/intel_dp.c | 40 ++++++++++++++++++++++++++++------------ 2 files changed, 35 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 84365cd22092..ba0550222269 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2122,9 +2122,13 @@ * Please check the detailed lore in the commit message for for experimental * evidence. */ -#define PORTD_HOTPLUG_LIVE_STATUS (1 << 29) -#define PORTC_HOTPLUG_LIVE_STATUS (1 << 28) -#define PORTB_HOTPLUG_LIVE_STATUS (1 << 27) +#define PORTD_HOTPLUG_LIVE_STATUS_G4X (1 << 29) +#define PORTC_HOTPLUG_LIVE_STATUS_G4X (1 << 28) +#define PORTB_HOTPLUG_LIVE_STATUS_G4X (1 << 27) +/* VLV DP/HDMI bits again match Bspec */ +#define PORTD_HOTPLUG_LIVE_STATUS_VLV (1 << 27) +#define PORTC_HOTPLUG_LIVE_STATUS_VLV (1 << 28) +#define PORTB_HOTPLUG_LIVE_STATUS_VLV (1 << 29) #define PORTD_HOTPLUG_INT_STATUS (3 << 21) #define PORTC_HOTPLUG_INT_STATUS (3 << 19) #define PORTB_HOTPLUG_INT_STATUS (3 << 17) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 689b832f7551..5ede4e8e290d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3009,18 +3009,34 @@ g4x_dp_detect(struct intel_dp *intel_dp) return status; } - switch (intel_dig_port->port) { - case PORT_B: - bit = PORTB_HOTPLUG_LIVE_STATUS; - break; - case PORT_C: - bit = PORTC_HOTPLUG_LIVE_STATUS; - break; - case PORT_D: - bit = PORTD_HOTPLUG_LIVE_STATUS; - break; - default: - return connector_status_unknown; + if (IS_VALLEYVIEW(dev)) { + switch (intel_dig_port->port) { + case PORT_B: + bit = PORTB_HOTPLUG_LIVE_STATUS_VLV; + break; + case PORT_C: + bit = PORTC_HOTPLUG_LIVE_STATUS_VLV; + break; + case PORT_D: + bit = PORTD_HOTPLUG_LIVE_STATUS_VLV; + break; + default: + return connector_status_unknown; + } + } else { + switch (intel_dig_port->port) { + case PORT_B: + bit = PORTB_HOTPLUG_LIVE_STATUS_G4X; + break; + case PORT_C: + bit = PORTC_HOTPLUG_LIVE_STATUS_G4X; + break; + case PORT_D: + bit = PORTD_HOTPLUG_LIVE_STATUS_G4X; + break; + default: + return connector_status_unknown; + } } if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) -- cgit v1.2.1 From 85ba7b7d399dd2c4c65bd84b9ae4dfbd707e79e7 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 24 Jan 2014 10:31:44 +0100 Subject: Revert "drm/i915: Mask reserved bits in display/sprite address registers" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reverts commit 446f254566ea8911c9e19c7bc8a162fc0e53cf31. I've left the masking in the pageflip code since that seems to be some useful piece of preemptive robustness. Iirc I've merged this patch under the assumption that the BIOS leaves some random gunk in the lower bits and gets unhappy if we trample on them. We have quite a few case like this, so this made sense. Now I've just learned that there's actual hardware features bits in the low 12 bits, and the kernel needs to preserve them to allow a userspace blob to do its job. Given Dave Airlie's clear stance on userspace blob drivers I've quickly chatted with him and he doesn't seem too happy. So let's revert this. If there are indeed bits that we must preserve in this range then we can ressurrect this patch, but with proper documentation for those bits supplied. And we probably also need to think a bit about interactions with our driver. Cc: Armin Reese Cc: Jesse Barnes Cc: Dave Airlie Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 2 -- drivers/gpu/drm/i915/intel_display.c | 8 ++++---- drivers/gpu/drm/i915/intel_sprite.c | 18 +++++++++--------- 3 files changed, 13 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index ba0550222269..a48b7cad6f11 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3578,8 +3578,6 @@ #define DISP_BASEADDR_MASK (0xfffff000) #define I915_LO_DISPBASE(val) (val & ~DISP_BASEADDR_MASK) #define I915_HI_DISPBASE(val) (val & DISP_BASEADDR_MASK) -#define I915_MODIFY_DISPBASE(reg, gfx_addr) \ - (I915_WRITE((reg), (gfx_addr) | I915_LO_DISPBASE(I915_READ(reg)))) /* VBIOS flags */ #define SWF00 (dev_priv->info->display_mmio_offset + 0x71410) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 98371eeac77c..40a9338ad54f 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2114,8 +2114,8 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb, fb->pitches[0]); I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]); if (INTEL_INFO(dev)->gen >= 4) { - I915_MODIFY_DISPBASE(DSPSURF(plane), - i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset); + I915_WRITE(DSPSURF(plane), + i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset); I915_WRITE(DSPTILEOFF(plane), (y << 16) | x); I915_WRITE(DSPLINOFF(plane), linear_offset); } else @@ -2205,8 +2205,8 @@ static int ironlake_update_plane(struct drm_crtc *crtc, i915_gem_obj_ggtt_offset(obj), linear_offset, x, y, fb->pitches[0]); I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]); - I915_MODIFY_DISPBASE(DSPSURF(plane), - i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset); + I915_WRITE(DSPSURF(plane), + i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset); if (IS_HASWELL(dev) || IS_BROADWELL(dev)) { I915_WRITE(DSPOFFSET(plane), (y << 16) | x); } else { diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index fe4de89c374c..716a3c9c0751 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -141,8 +141,8 @@ vlv_update_plane(struct drm_plane *dplane, struct drm_crtc *crtc, I915_WRITE(SPSIZE(pipe, plane), (crtc_h << 16) | crtc_w); I915_WRITE(SPCNTR(pipe, plane), sprctl); - I915_MODIFY_DISPBASE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) + - sprsurf_offset); + I915_WRITE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) + + sprsurf_offset); POSTING_READ(SPSURF(pipe, plane)); } @@ -158,7 +158,7 @@ vlv_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc) I915_WRITE(SPCNTR(pipe, plane), I915_READ(SPCNTR(pipe, plane)) & ~SP_ENABLE); /* Activate double buffered register update */ - I915_MODIFY_DISPBASE(SPSURF(pipe, plane), 0); + I915_WRITE(SPSURF(pipe, plane), 0); POSTING_READ(SPSURF(pipe, plane)); intel_update_sprite_watermarks(dplane, crtc, 0, 0, false, false); @@ -315,8 +315,8 @@ ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, if (intel_plane->can_scale) I915_WRITE(SPRSCALE(pipe), sprscale); I915_WRITE(SPRCTL(pipe), sprctl); - I915_MODIFY_DISPBASE(SPRSURF(pipe), - i915_gem_obj_ggtt_offset(obj) + sprsurf_offset); + I915_WRITE(SPRSURF(pipe), + i915_gem_obj_ggtt_offset(obj) + sprsurf_offset); POSTING_READ(SPRSURF(pipe)); } @@ -333,7 +333,7 @@ ivb_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc) if (intel_plane->can_scale) I915_WRITE(SPRSCALE(pipe), 0); /* Activate double buffered register update */ - I915_MODIFY_DISPBASE(SPRSURF(pipe), 0); + I915_WRITE(SPRSURF(pipe), 0); POSTING_READ(SPRSURF(pipe)); /* @@ -489,8 +489,8 @@ ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, I915_WRITE(DVSSIZE(pipe), (crtc_h << 16) | crtc_w); I915_WRITE(DVSSCALE(pipe), dvsscale); I915_WRITE(DVSCNTR(pipe), dvscntr); - I915_MODIFY_DISPBASE(DVSSURF(pipe), - i915_gem_obj_ggtt_offset(obj) + dvssurf_offset); + I915_WRITE(DVSSURF(pipe), + i915_gem_obj_ggtt_offset(obj) + dvssurf_offset); POSTING_READ(DVSSURF(pipe)); } @@ -506,7 +506,7 @@ ilk_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc) /* Disable the scaler */ I915_WRITE(DVSSCALE(pipe), 0); /* Flush double buffered register updates */ - I915_MODIFY_DISPBASE(DVSSURF(pipe), 0); + I915_WRITE(DVSSURF(pipe), 0); POSTING_READ(DVSSURF(pipe)); /* -- cgit v1.2.1 From 22accca01713b13dac386ca90b787aadf88f6551 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Sat, 25 Jan 2014 10:13:37 +0100 Subject: i915: remove pm_qos request on error Not removing pm qos request and free memory for it can cause crash, when some other driver use pm qos. For example, this oops: BUG: unable to handle kernel paging request at fffffffffffffff8 IP: [] plist_add+0x5b/0xd0 Call Trace: [] pm_qos_update_target+0x125/0x1e0 [] pm_qos_add_request+0x91/0x100 [] e1000_open+0xe4/0x5b0 [e1000e] was caused by earlier i915 probe failure: [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking [drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head 00003004 tail 00000000 start 00003000 [drm:i915_driver_load] *ERROR* failed to init modeset i915: probe of 0000:00:02.0 failed with error -5 Bug report: http://bugzilla.redhat.com/show_bug.cgi?id=1057533 Reported-by: Giandomenico De Tullio Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka [danvet: Drop unnecessary code movement.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_dma.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index e177d021c444..15a74f979b4b 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1685,6 +1685,7 @@ out_gem_unload: intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); + pm_qos_remove_request(&dev_priv->pm_qos); destroy_workqueue(dev_priv->wq); out_mtrrfree: arch_phys_wc_del(dev_priv->gtt.mtrr); -- cgit v1.2.1 From 372fbb8e3927fc76b0f842d8eb8a798a71d8960f Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 27 Jan 2014 13:52:34 +0000 Subject: drm/i915: Decouple GPU error reporting from ring initialisation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently we report through our error state only the rings that have been initialised (as detected by ring->obj). This check is done after the GPU reset and ring re-initialisation, which means that the software state may not be the same as when we captured the hardware error and we may not print out any of the vital information for debugging the hang. This (and the implied object leak) is a regression from commit 3d57e5bd1284f44e325f3a52d966259ed42f9e05 Author: Ben Widawsky Date: Mon Oct 14 10:01:36 2013 -0700 drm/i915: Do a fuller init after reset Note that we are already starting to get bug reports with incomplete error states from 3.13, which also hampers debugging userspace driver issues. v2: Prevent a NULL dereference on 830gm/845g after a GPU reset where the scratch obj may be NULL. Signed-off-by: Chris Wilson Cc: Ben Widawsky Cc: Ville Syrjälä References: https://bugs.freedesktop.org/show_bug.cgi?id=74094 Cc: stable@vger.kernel.org # please don't delay since it's a vital support/debug feature for the intel gfx stack in general Reviewed-by: Ville Syrjälä [danvet: Add a bit of fluff to make it clear we need this expedited in stable.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gpu_error.c | 22 +++++++++++++++------- 2 files changed, 16 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index ff6f870d6621..98322053eb2a 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -330,6 +330,7 @@ struct drm_i915_error_state { u64 fence[I915_MAX_NUM_FENCES]; struct timeval time; struct drm_i915_error_ring { + bool valid; struct drm_i915_error_object { int page_count; u32 gtt_offset; diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index a707cca692e4..d7fd2fd2f0a5 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -239,6 +239,9 @@ static void i915_ring_error_state(struct drm_i915_error_state_buf *m, unsigned ring) { BUG_ON(ring >= I915_NUM_RINGS); /* shut up confused gcc */ + if (!error->ring[ring].valid) + return; + err_printf(m, "%s command stream:\n", ring_str(ring)); err_printf(m, " HEAD: 0x%08x\n", error->head[ring]); err_printf(m, " TAIL: 0x%08x\n", error->tail[ring]); @@ -293,7 +296,6 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m, struct drm_device *dev = error_priv->dev; drm_i915_private_t *dev_priv = dev->dev_private; struct drm_i915_error_state *error = error_priv->error; - struct intel_ring_buffer *ring; int i, j, page, offset, elt; if (!error) { @@ -328,7 +330,7 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m, if (INTEL_INFO(dev)->gen == 7) err_printf(m, "ERR_INT: 0x%08x\n", error->err_int); - for_each_ring(ring, dev_priv, i) + for (i = 0; i < ARRAY_SIZE(error->ring); i++) i915_ring_error_state(m, dev, error, i); if (error->active_bo) @@ -385,8 +387,7 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m, } } - obj = error->ring[i].ctx; - if (obj) { + if ((obj = error->ring[i].ctx)) { err_printf(m, "%s --- HW Context = 0x%08x\n", dev_priv->ring[i].name, obj->gtt_offset); @@ -667,7 +668,8 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, return NULL; obj = ring->scratch.obj; - if (acthd >= i915_gem_obj_ggtt_offset(obj) && + if (obj != NULL && + acthd >= i915_gem_obj_ggtt_offset(obj) && acthd < i915_gem_obj_ggtt_offset(obj) + obj->base.size) return i915_error_object_create(dev_priv, obj); } @@ -775,11 +777,17 @@ static void i915_gem_record_rings(struct drm_device *dev, struct drm_i915_error_state *error) { struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_ring_buffer *ring; struct drm_i915_gem_request *request; int i, count; - for_each_ring(ring, dev_priv, i) { + for (i = 0; i < I915_NUM_RINGS; i++) { + struct intel_ring_buffer *ring = &dev_priv->ring[i]; + + if (ring->dev == NULL) + continue; + + error->ring[i].valid = true; + i915_record_ring_state(dev, error, ring); error->ring[i].batchbuffer = -- cgit v1.2.1 From ec14ba47791965d2c08e0a681ff44eacbf3c4553 Mon Sep 17 00:00:00 2001 From: Akash Goel Date: Mon, 13 Jan 2014 16:24:45 +0530 Subject: drm/i915: Fix the offset issue for the stolen GEM objects The 'offset' field of the 'scatterlist' structure was wrongly programmed with the offset value from the base of stolen area, whereas this field indicates the offset from where the interested data starts within the first PAGE pointed to by 'scattterlist' structure. As a result when a new GEM object allocated from stolen area is mapped to GTT, it could lead to an overwrite of GTT entries as the page count calculation will go wrong, refer the function 'sg_page_count'. v2: Modified the commit message. (Chris) Signed-off-by: Akash Goel Reviewed-by: Jesse Barnes Cc: stable@vger.kernel.org Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71908 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69104 Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index fed87ec17211..1a24e84f2315 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -250,7 +250,7 @@ i915_pages_create_for_stolen(struct drm_device *dev, } sg = st->sgl; - sg->offset = offset; + sg->offset = 0; sg->length = size; sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; -- cgit v1.2.1