From 9bb39ff43e15e85bc1bd9bbbdc5b9cef7a670fd5 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Wed, 27 Aug 2014 16:45:18 -0400 Subject: [PATCH] drm/radeon: take exclusive_lock in read mode during ring tests, v5 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This is needed for the next commit, because the lockup detection will need the read lock to run. v4 (chk): split out forced fence completion, remove unrelated changes, add and handle in_reset flag v5 (agd5f): rebase fix Signed-off-by: Maarten Lankhorst Signed-off-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon.h | 2 +- drivers/gpu/drm/radeon/radeon_cs.c | 7 +++++ drivers/gpu/drm/radeon/radeon_device.c | 37 +++++++++++-------------- drivers/gpu/drm/radeon/radeon_display.c | 4 ++- 4 files changed, 27 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 5f967c0b5aa3..8cd1b3f60d4a 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -2326,7 +2326,7 @@ struct radeon_device { bool need_dma32; bool accel_working; bool fastfb_working; /* IGP feature*/ - bool needs_reset; + bool needs_reset, in_reset; struct radeon_surface_reg surface_regs[RADEON_GEM_MAX_SURFACES]; const struct firmware *me_fw; /* all family ME firmware */ const struct firmware *pfp_fw; /* r6/700 PFP firmware */ diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index db739bd64f16..bd328cb6fa61 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -653,6 +653,13 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) up_read(&rdev->exclusive_lock); return -EBUSY; } + if (rdev->in_reset) { + up_read(&rdev->exclusive_lock); + r = radeon_gpu_reset(rdev); + if (!r) + r = -EAGAIN; + return r; + } /* initialize parser */ memset(&parser, 0, sizeof(struct radeon_cs_parser)); parser.filp = filp; diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 8b442e4ab1da..9f666370b5ac 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -1673,6 +1673,7 @@ int radeon_gpu_reset(struct radeon_device *rdev) return 0; } + rdev->in_reset = true; rdev->needs_reset = false; radeon_save_bios_scratch_regs(rdev); @@ -1691,7 +1692,6 @@ int radeon_gpu_reset(struct radeon_device *rdev) } } -retry: r = radeon_asic_reset(rdev); if (!r) { dev_info(rdev->dev, "GPU reset succeeded, trying to resume\n"); @@ -1700,25 +1700,11 @@ retry: radeon_restore_bios_scratch_regs(rdev); - if (!r) { - for (i = 0; i < RADEON_NUM_RINGS; ++i) { + for (i = 0; i < RADEON_NUM_RINGS; ++i) { + if (!r && ring_data[i]) { radeon_ring_restore(rdev, &rdev->ring[i], ring_sizes[i], ring_data[i]); - ring_sizes[i] = 0; - ring_data[i] = NULL; - } - - r = radeon_ib_ring_tests(rdev); - if (r) { - dev_err(rdev->dev, "ib ring test failed (%d).\n", r); - if (saved) { - saved = false; - radeon_suspend(rdev); - goto retry; - } - } - } else { - for (i = 0; i < RADEON_NUM_RINGS; ++i) { + } else { radeon_fence_driver_force_completion(rdev, i); kfree(ring_data[i]); } @@ -1751,19 +1737,28 @@ retry: /* reset hpd state */ radeon_hpd_init(rdev); + ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched); + downgrade_write(&rdev->exclusive_lock); + drm_helper_resume_force_mode(rdev->ddev); /* set the power state here in case we are a PX system or headless */ if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) radeon_pm_compute_clocks(rdev); - ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched); - if (r) { + if (!r) { + r = radeon_ib_ring_tests(rdev); + if (r && saved) + r = -EAGAIN; + } else { /* bad news, how to tell it to userspace ? */ dev_info(rdev->dev, "GPU reset failed\n"); } - up_write(&rdev->exclusive_lock); + rdev->needs_reset = r == -EAGAIN; + rdev->in_reset = false; + + up_read(&rdev->exclusive_lock); return r; } diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 3fdf87318069..bd0d687379ee 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -405,7 +405,9 @@ static void radeon_flip_work_func(struct work_struct *__work) r = radeon_fence_wait(work->fence, false); if (r == -EDEADLK) { up_read(&rdev->exclusive_lock); - r = radeon_gpu_reset(rdev); + do { + r = radeon_gpu_reset(rdev); + } while (r == -EAGAIN); down_read(&rdev->exclusive_lock); } if (r) -- 2.30.2