From: Maarten Lankhorst Date: Tue, 17 May 2016 13:07:52 +0000 (+0200) Subject: drm/i915: Convert flip_work to a list. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6885843ae164e11f6c802209d06921e678a3f3f3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Convert flip_work to a list. This will be required to allow more than 1 update in the future. Signed-off-by: Maarten Lankhorst Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-10-git-send-email-maarten.lankhorst@linux.intel.com Reviewed-by: Patrik Jakobsson --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 0a4bedb96d65..220ec15e9864 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -592,6 +592,53 @@ static int i915_gem_gtt_info(struct seq_file *m, void *data) return 0; } +static void i915_dump_pageflip(struct seq_file *m, + struct drm_i915_private *dev_priv, + struct intel_crtc *crtc, + struct intel_flip_work *work) +{ + const char pipe = pipe_name(crtc->pipe); + const char plane = plane_name(crtc->plane); + u32 pending; + u32 addr; + + pending = atomic_read(&work->pending); + if (pending) { + seq_printf(m, "Flip ioctl preparing on pipe %c (plane %c)\n", + pipe, plane); + } else { + seq_printf(m, "Flip pending (waiting for vsync) on pipe %c (plane %c)\n", + pipe, plane); + } + if (work->flip_queued_req) { + struct intel_engine_cs *engine = i915_gem_request_get_engine(work->flip_queued_req); + + seq_printf(m, "Flip queued on %s at seqno %x, next seqno %x [current breadcrumb %x], completed? %d\n", + engine->name, + i915_gem_request_get_seqno(work->flip_queued_req), + dev_priv->next_seqno, + engine->get_seqno(engine), + i915_gem_request_completed(work->flip_queued_req, true)); + } else + seq_printf(m, "Flip not associated with any ring\n"); + seq_printf(m, "Flip queued on frame %d, (was ready on frame %d), now %d\n", + work->flip_queued_vblank, + work->flip_ready_vblank, + intel_crtc_get_vblank_counter(crtc)); + seq_printf(m, "%d prepares\n", atomic_read(&work->pending)); + + if (INTEL_INFO(dev_priv)->gen >= 4) + addr = I915_HI_DISPBASE(I915_READ(DSPSURF(crtc->plane))); + else + addr = I915_READ(DSPADDR(crtc->plane)); + seq_printf(m, "Current scanout address 0x%08x\n", addr); + + if (work->pending_flip_obj) { + seq_printf(m, "New framebuffer address 0x%08lx\n", (long)work->gtt_offset); + seq_printf(m, "MMIO update completed? %d\n", addr == work->gtt_offset); + } +} + static int i915_gem_pageflip_info(struct seq_file *m, void *data) { struct drm_info_node *node = m->private; @@ -610,48 +657,13 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data) struct intel_flip_work *work; spin_lock_irq(&dev->event_lock); - work = crtc->flip_work; - if (work == NULL) { + if (list_empty(&crtc->flip_work)) { seq_printf(m, "No flip due on pipe %c (plane %c)\n", pipe, plane); } else { - u32 pending; - u32 addr; - - pending = atomic_read(&work->pending); - if (pending) { - seq_printf(m, "Flip ioctl preparing on pipe %c (plane %c)\n", - pipe, plane); - } else { - seq_printf(m, "Flip pending (waiting for vsync) on pipe %c (plane %c)\n", - pipe, plane); - } - if (work->flip_queued_req) { - struct intel_engine_cs *engine = i915_gem_request_get_engine(work->flip_queued_req); - - seq_printf(m, "Flip queued on %s at seqno %x, next seqno %x [current breadcrumb %x], completed? %d\n", - engine->name, - i915_gem_request_get_seqno(work->flip_queued_req), - dev_priv->next_seqno, - engine->get_seqno(engine), - i915_gem_request_completed(work->flip_queued_req, true)); - } else - seq_printf(m, "Flip not associated with any ring\n"); - seq_printf(m, "Flip queued on frame %d, (was ready on frame %d), now %d\n", - work->flip_queued_vblank, - work->flip_ready_vblank, - intel_crtc_get_vblank_counter(crtc)); - seq_printf(m, "%d prepares\n", atomic_read(&work->pending)); - - if (INTEL_INFO(dev)->gen >= 4) - addr = I915_HI_DISPBASE(I915_READ(DSPSURF(crtc->plane))); - else - addr = I915_READ(DSPADDR(crtc->plane)); - seq_printf(m, "Current scanout address 0x%08x\n", addr); - - if (work->pending_flip_obj) { - seq_printf(m, "New framebuffer address 0x%08lx\n", (long)work->gtt_offset); - seq_printf(m, "MMIO update completed? %d\n", addr == work->gtt_offset); + list_for_each_entry(work, &crtc->flip_work, head) { + i915_dump_pageflip(m, dev_priv, crtc, work); + seq_puts(m, "\n"); } } spin_unlock_irq(&dev->event_lock); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 72f0b02a8372..26c0525fc546 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -622,7 +622,7 @@ struct drm_i915_display_funcs { struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags); + uint64_t gtt_offset); void (*hpd_irq_setup)(struct drm_i915_private *dev_priv); /* clock updates for mode set */ /* cursor updates */ diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 9c57736fc521..04801ec76d48 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3213,17 +3213,12 @@ static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc) struct drm_device *dev = crtc->dev; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); unsigned reset_counter; - bool pending; reset_counter = i915_reset_counter(&to_i915(dev)->gpu_error); if (intel_crtc->reset_counter != reset_counter) return false; - spin_lock_irq(&dev->event_lock); - pending = to_intel_crtc(crtc)->flip_work != NULL; - spin_unlock_irq(&dev->event_lock); - - return pending; + return !list_empty_careful(&to_intel_crtc(crtc)->flip_work); } static void intel_update_pipe_config(struct intel_crtc *crtc, @@ -3799,7 +3794,7 @@ bool intel_has_pending_fb_unpin(struct drm_device *dev) if (atomic_read(&crtc->unpin_work_count) == 0) continue; - if (crtc->flip_work) + if (!list_empty_careful(&crtc->flip_work)) intel_wait_for_vblank(dev, crtc->pipe); return true; @@ -3808,12 +3803,11 @@ bool intel_has_pending_fb_unpin(struct drm_device *dev) return false; } -static void page_flip_completed(struct intel_crtc *intel_crtc) +static void page_flip_completed(struct intel_crtc *intel_crtc, struct intel_flip_work *work) { struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); - struct intel_flip_work *work = intel_crtc->flip_work; - intel_crtc->flip_work = NULL; + list_del_init(&work->head); if (work->event) drm_crtc_send_vblank_event(&intel_crtc->base, work->event); @@ -3848,10 +3842,16 @@ static int intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc) struct intel_flip_work *work; spin_lock_irq(&dev->event_lock); - work = intel_crtc->flip_work; + + /* + * If we're waiting for page flips, it's the first + * flip on the list that's stuck. + */ + work = list_first_entry_or_null(&intel_crtc->flip_work, + struct intel_flip_work, head); if (work && !is_mmio_work(work)) { WARN_ONCE(1, "Removing stuck page flip\n"); - page_flip_completed(intel_crtc); + page_flip_completed(intel_crtc, work); } spin_unlock_irq(&dev->event_lock); } @@ -6232,7 +6232,7 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc) return; if (to_intel_plane_state(crtc->primary->state)->visible) { - WARN_ON(intel_crtc->flip_work); + WARN_ON(list_empty(&intel_crtc->flip_work)); intel_pre_disable_primary_noatomic(crtc); @@ -10831,15 +10831,19 @@ static void intel_crtc_destroy(struct drm_crtc *crtc) struct intel_flip_work *work; spin_lock_irq(&dev->event_lock); - work = intel_crtc->flip_work; - intel_crtc->flip_work = NULL; - spin_unlock_irq(&dev->event_lock); + while (!list_empty(&intel_crtc->flip_work)) { + work = list_first_entry(&intel_crtc->flip_work, + struct intel_flip_work, head); + list_del_init(&work->head); + spin_unlock_irq(&dev->event_lock); - if (work) { cancel_work_sync(&work->mmio_work); cancel_work_sync(&work->unpin_work); kfree(work); + + spin_lock_irq(&dev->event_lock); } + spin_unlock_irq(&dev->event_lock); drm_crtc_cleanup(crtc); @@ -10924,9 +10928,9 @@ static bool __pageflip_finished_cs(struct intel_crtc *crtc, * anyway, we don't really care. */ return (I915_READ(DSPSURFLIVE(crtc->plane)) & ~0xfff) == - crtc->flip_work->gtt_offset && + work->gtt_offset && g4x_flip_count_after_eq(I915_READ(PIPE_FLIPCOUNT_G4X(crtc->pipe)), - crtc->flip_work->flip_count); + work->flip_count); } static bool @@ -10976,13 +10980,19 @@ void intel_finish_page_flip_cs(struct drm_i915_private *dev_priv, int pipe) * lost pageflips) so needs the full irqsave spinlocks. */ spin_lock_irqsave(&dev->event_lock, flags); - work = intel_crtc->flip_work; + while (!list_empty(&intel_crtc->flip_work)) { + work = list_first_entry(&intel_crtc->flip_work, + struct intel_flip_work, + head); - if (work != NULL && - !is_mmio_work(work) && - pageflip_finished(intel_crtc, work)) - page_flip_completed(intel_crtc); + if (is_mmio_work(work)) + break; + if (!pageflip_finished(intel_crtc, work)) + break; + + page_flip_completed(intel_crtc, work); + } spin_unlock_irqrestore(&dev->event_lock, flags); } @@ -11003,13 +11013,19 @@ void intel_finish_page_flip_mmio(struct drm_i915_private *dev_priv, int pipe) * lost pageflips) so needs the full irqsave spinlocks. */ spin_lock_irqsave(&dev->event_lock, flags); - work = intel_crtc->flip_work; + while (!list_empty(&intel_crtc->flip_work)) { + work = list_first_entry(&intel_crtc->flip_work, + struct intel_flip_work, + head); - if (work != NULL && - is_mmio_work(work) && - pageflip_finished(intel_crtc, work)) - page_flip_completed(intel_crtc); + if (!is_mmio_work(work)) + break; + + if (!pageflip_finished(intel_crtc, work)) + break; + page_flip_completed(intel_crtc, work); + } spin_unlock_irqrestore(&dev->event_lock, flags); } @@ -11028,7 +11044,7 @@ static int intel_gen2_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { struct intel_engine_cs *engine = req->engine; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); @@ -11051,7 +11067,7 @@ static int intel_gen2_queue_flip(struct drm_device *dev, intel_ring_emit(engine, MI_DISPLAY_FLIP | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); intel_ring_emit(engine, fb->pitches[0]); - intel_ring_emit(engine, intel_crtc->flip_work->gtt_offset); + intel_ring_emit(engine, gtt_offset); intel_ring_emit(engine, 0); /* aux display base address, unused */ return 0; @@ -11062,7 +11078,7 @@ static int intel_gen3_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { struct intel_engine_cs *engine = req->engine; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); @@ -11082,7 +11098,7 @@ static int intel_gen3_queue_flip(struct drm_device *dev, intel_ring_emit(engine, MI_DISPLAY_FLIP_I915 | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); intel_ring_emit(engine, fb->pitches[0]); - intel_ring_emit(engine, intel_crtc->flip_work->gtt_offset); + intel_ring_emit(engine, gtt_offset); intel_ring_emit(engine, MI_NOOP); return 0; @@ -11093,7 +11109,7 @@ static int intel_gen4_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { struct intel_engine_cs *engine = req->engine; struct drm_i915_private *dev_priv = dev->dev_private; @@ -11112,8 +11128,7 @@ static int intel_gen4_queue_flip(struct drm_device *dev, intel_ring_emit(engine, MI_DISPLAY_FLIP | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); intel_ring_emit(engine, fb->pitches[0]); - intel_ring_emit(engine, intel_crtc->flip_work->gtt_offset | - obj->tiling_mode); + intel_ring_emit(engine, gtt_offset | obj->tiling_mode); /* XXX Enabling the panel-fitter across page-flip is so far * untested on non-native modes, so ignore it for now. @@ -11131,7 +11146,7 @@ static int intel_gen6_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { struct intel_engine_cs *engine = req->engine; struct drm_i915_private *dev_priv = dev->dev_private; @@ -11146,7 +11161,7 @@ static int intel_gen6_queue_flip(struct drm_device *dev, intel_ring_emit(engine, MI_DISPLAY_FLIP | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); intel_ring_emit(engine, fb->pitches[0] | obj->tiling_mode); - intel_ring_emit(engine, intel_crtc->flip_work->gtt_offset); + intel_ring_emit(engine, gtt_offset); /* Contrary to the suggestions in the documentation, * "Enable Panel Fitter" does not seem to be required when page @@ -11166,7 +11181,7 @@ static int intel_gen7_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { struct intel_engine_cs *engine = req->engine; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); @@ -11249,7 +11264,7 @@ static int intel_gen7_queue_flip(struct drm_device *dev, intel_ring_emit(engine, MI_DISPLAY_FLIP_I915 | plane_bit); intel_ring_emit(engine, (fb->pitches[0] | obj->tiling_mode)); - intel_ring_emit(engine, intel_crtc->flip_work->gtt_offset); + intel_ring_emit(engine, gtt_offset); intel_ring_emit(engine, (MI_NOOP)); return 0; @@ -11316,7 +11331,7 @@ static int intel_default_queue_flip(struct drm_device *dev, struct drm_framebuffer *fb, struct drm_i915_gem_object *obj, struct drm_i915_gem_request *req, - uint32_t flags) + uint64_t gtt_offset) { return -ENODEV; } @@ -11371,20 +11386,26 @@ void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe) return; spin_lock(&dev->event_lock); - work = intel_crtc->flip_work; + while (!list_empty(&intel_crtc->flip_work)) { + work = list_first_entry(&intel_crtc->flip_work, + struct intel_flip_work, head); - if (work != NULL && !is_mmio_work(work) && - __pageflip_stall_check_cs(dev_priv, intel_crtc, work)) { - WARN_ONCE(1, - "Kicking stuck page flip: queued at %d, now %d\n", - work->flip_queued_vblank, intel_crtc_get_vblank_counter(intel_crtc)); - page_flip_completed(intel_crtc); - work = NULL; - } + if (is_mmio_work(work)) + break; - if (work != NULL && !is_mmio_work(work) && - intel_crtc_get_vblank_counter(intel_crtc) - work->flip_queued_vblank > 1) - intel_queue_rps_boost_for_request(work->flip_queued_req); + if (__pageflip_stall_check_cs(dev_priv, intel_crtc, work)) { + WARN_ONCE(1, + "Kicking stuck page flip: queued at %d, now %d\n", + work->flip_queued_vblank, intel_crtc_get_vblank_counter(intel_crtc)); + page_flip_completed(intel_crtc, work); + continue; + } + + if (intel_crtc_get_vblank_counter(intel_crtc) - work->flip_queued_vblank > 1) + intel_queue_rps_boost_for_request(work->flip_queued_req); + + break; + } spin_unlock(&dev->event_lock); } @@ -11445,13 +11466,18 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, /* We borrow the event spin lock for protecting flip_work */ spin_lock_irq(&dev->event_lock); - if (intel_crtc->flip_work) { + if (!list_empty(&intel_crtc->flip_work)) { + struct intel_flip_work *old_work; + + old_work = list_last_entry(&intel_crtc->flip_work, + struct intel_flip_work, head); + /* Before declaring the flip queue wedged, check if * the hardware completed the operation behind our backs. */ - if (pageflip_finished(intel_crtc, intel_crtc->flip_work)) { + if (pageflip_finished(intel_crtc, old_work)) { DRM_DEBUG_DRIVER("flip queue: previous flip completed, continuing\n"); - page_flip_completed(intel_crtc); + page_flip_completed(intel_crtc, old_work); } else { DRM_DEBUG_DRIVER("flip queue: crtc already busy\n"); spin_unlock_irq(&dev->event_lock); @@ -11461,7 +11487,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, return -EBUSY; } } - intel_crtc->flip_work = work; + list_add_tail(&work->head, &intel_crtc->flip_work); spin_unlock_irq(&dev->event_lock); if (atomic_read(&intel_crtc->unpin_work_count) >= 2) @@ -11543,7 +11569,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, } else { i915_gem_request_assign(&work->flip_queued_req, request); ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, request, - page_flip_flags); + work->gtt_offset); if (ret) goto cleanup_unpin; @@ -11578,7 +11604,7 @@ cleanup: drm_framebuffer_unreference(work->old_fb); spin_lock_irq(&dev->event_lock); - intel_crtc->flip_work = NULL; + list_del(&work->head); spin_unlock_irq(&dev->event_lock); drm_crtc_vblank_put(crtc); @@ -14184,6 +14210,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe) intel_crtc->base.state = &crtc_state->base; crtc_state->base.crtc = &intel_crtc->base; + INIT_LIST_HEAD(&intel_crtc->flip_work); + /* initialize shared scalers */ if (INTEL_INFO(dev)->gen >= 9) { if (pipe == PIPE_C) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 9502e79b2f5b..cec2deb438af 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -641,7 +641,7 @@ struct intel_crtc { unsigned long enabled_power_domains; bool lowfreq_avail; struct intel_overlay *overlay; - struct intel_flip_work *flip_work; + struct list_head flip_work; atomic_t unpin_work_count; @@ -970,6 +970,8 @@ intel_get_crtc_for_plane(struct drm_device *dev, int plane) } struct intel_flip_work { + struct list_head head; + struct work_struct unpin_work; struct work_struct mmio_work;