| 0,0 → 1,387 |
|---|
| /* |
| * Copyright 2009 Jerome Glisse. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| */ |
| /* |
| * Authors: |
| * Jerome Glisse <glisse@freedesktop.org> |
| * Dave Airlie |
| */ |
| #include <linux/seq_file.h> |
| #include <asm/atomic.h> |
| #include <linux/wait.h> |
| #include <linux/list.h> |
| #include <linux/kref.h> |
| #include "drmP.h" |
| #include "drm.h" |
| #include "radeon_reg.h" |
| #include "radeon.h" |
| |
| int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence) |
| { |
| unsigned long irq_flags; |
| |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| if (fence->emited) { |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return 0; |
| } |
| fence->seq = atomic_add_return(1, &rdev->fence_drv.seq); |
| if (!rdev->cp.ready) { |
| /* FIXME: cp is not running assume everythings is done right |
| * away |
| */ |
| WREG32(rdev->fence_drv.scratch_reg, fence->seq); |
| } else { |
| radeon_fence_ring_emit(rdev, fence); |
| } |
| fence->emited = true; |
| fence->timeout = jiffies + ((2000 * HZ) / 1000); |
| list_del(&fence->list); |
| list_add_tail(&fence->list, &rdev->fence_drv.emited); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return 0; |
| } |
| |
| static bool radeon_fence_poll_locked(struct radeon_device *rdev) |
| { |
| struct radeon_fence *fence; |
| struct list_head *i, *n; |
| uint32_t seq; |
| bool wake = false; |
| |
| if (rdev == NULL) { |
| return true; |
| } |
| if (rdev->shutdown) { |
| return true; |
| } |
| seq = RREG32(rdev->fence_drv.scratch_reg); |
| rdev->fence_drv.last_seq = seq; |
| n = NULL; |
| list_for_each(i, &rdev->fence_drv.emited) { |
| fence = list_entry(i, struct radeon_fence, list); |
| if (fence->seq == seq) { |
| n = i; |
| break; |
| } |
| } |
| /* all fence previous to this one are considered as signaled */ |
| if (n) { |
| i = n; |
| do { |
| n = i->prev; |
| list_del(i); |
| list_add_tail(i, &rdev->fence_drv.signaled); |
| fence = list_entry(i, struct radeon_fence, list); |
| fence->signaled = true; |
| i = n; |
| } while (i != &rdev->fence_drv.emited); |
| wake = true; |
| } |
| return wake; |
| } |
| |
| static void radeon_fence_destroy(struct kref *kref) |
| { |
| unsigned long irq_flags; |
| struct radeon_fence *fence; |
| |
| fence = container_of(kref, struct radeon_fence, kref); |
| write_lock_irqsave(&fence->rdev->fence_drv.lock, irq_flags); |
| list_del(&fence->list); |
| fence->emited = false; |
| write_unlock_irqrestore(&fence->rdev->fence_drv.lock, irq_flags); |
| kfree(fence); |
| } |
| |
| int radeon_fence_create(struct radeon_device *rdev, struct radeon_fence **fence) |
| { |
| unsigned long irq_flags; |
| |
| *fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL); |
| if ((*fence) == NULL) { |
| return -ENOMEM; |
| } |
| kref_init(&((*fence)->kref)); |
| (*fence)->rdev = rdev; |
| (*fence)->emited = false; |
| (*fence)->signaled = false; |
| (*fence)->seq = 0; |
| INIT_LIST_HEAD(&(*fence)->list); |
| |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| list_add_tail(&(*fence)->list, &rdev->fence_drv.created); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return 0; |
| } |
| |
| |
| bool radeon_fence_signaled(struct radeon_fence *fence) |
| { |
| struct radeon_device *rdev = fence->rdev; |
| unsigned long irq_flags; |
| bool signaled = false; |
| |
| if (rdev->gpu_lockup) { |
| return true; |
| } |
| if (fence == NULL) { |
| return true; |
| } |
| write_lock_irqsave(&fence->rdev->fence_drv.lock, irq_flags); |
| signaled = fence->signaled; |
| /* if we are shuting down report all fence as signaled */ |
| if (fence->rdev->shutdown) { |
| signaled = true; |
| } |
| if (!fence->emited) { |
| WARN(1, "Querying an unemited fence : %p !\n", fence); |
| signaled = true; |
| } |
| if (!signaled) { |
| radeon_fence_poll_locked(fence->rdev); |
| signaled = fence->signaled; |
| } |
| write_unlock_irqrestore(&fence->rdev->fence_drv.lock, irq_flags); |
| return signaled; |
| } |
| |
| int radeon_fence_wait(struct radeon_fence *fence, bool interruptible) |
| { |
| struct radeon_device *rdev; |
| unsigned long cur_jiffies; |
| unsigned long timeout; |
| bool expired = false; |
| int r; |
| |
| |
| if (fence == NULL) { |
| WARN(1, "Querying an invalid fence : %p !\n", fence); |
| return 0; |
| } |
| rdev = fence->rdev; |
| if (radeon_fence_signaled(fence)) { |
| return 0; |
| } |
| retry: |
| cur_jiffies = jiffies; |
| timeout = HZ / 100; |
| if (time_after(fence->timeout, cur_jiffies)) { |
| timeout = fence->timeout - cur_jiffies; |
| } |
| if (interruptible) { |
| r = wait_event_interruptible_timeout(rdev->fence_drv.queue, |
| radeon_fence_signaled(fence), timeout); |
| if (unlikely(r == -ERESTARTSYS)) { |
| return -ERESTART; |
| } |
| } else { |
| r = wait_event_timeout(rdev->fence_drv.queue, |
| radeon_fence_signaled(fence), timeout); |
| } |
| if (unlikely(!radeon_fence_signaled(fence))) { |
| if (unlikely(r == 0)) { |
| expired = true; |
| } |
| if (unlikely(expired)) { |
| timeout = 1; |
| if (time_after(cur_jiffies, fence->timeout)) { |
| timeout = cur_jiffies - fence->timeout; |
| } |
| timeout = jiffies_to_msecs(timeout); |
| if (timeout > 500) { |
| DRM_ERROR("fence(%p:0x%08X) %lums timeout " |
| "going to reset GPU\n", |
| fence, fence->seq, timeout); |
| radeon_gpu_reset(rdev); |
| WREG32(rdev->fence_drv.scratch_reg, fence->seq); |
| } |
| } |
| goto retry; |
| } |
| if (unlikely(expired)) { |
| rdev->fence_drv.count_timeout++; |
| cur_jiffies = jiffies; |
| timeout = 1; |
| if (time_after(cur_jiffies, fence->timeout)) { |
| timeout = cur_jiffies - fence->timeout; |
| } |
| timeout = jiffies_to_msecs(timeout); |
| DRM_ERROR("fence(%p:0x%08X) %lums timeout\n", |
| fence, fence->seq, timeout); |
| DRM_ERROR("last signaled fence(0x%08X)\n", |
| rdev->fence_drv.last_seq); |
| } |
| return 0; |
| } |
| |
| int radeon_fence_wait_next(struct radeon_device *rdev) |
| { |
| unsigned long irq_flags; |
| struct radeon_fence *fence; |
| int r; |
| |
| if (rdev->gpu_lockup) { |
| return 0; |
| } |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| if (list_empty(&rdev->fence_drv.emited)) { |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return 0; |
| } |
| fence = list_entry(rdev->fence_drv.emited.next, |
| struct radeon_fence, list); |
| radeon_fence_ref(fence); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| r = radeon_fence_wait(fence, false); |
| radeon_fence_unref(&fence); |
| return r; |
| } |
| |
| int radeon_fence_wait_last(struct radeon_device *rdev) |
| { |
| unsigned long irq_flags; |
| struct radeon_fence *fence; |
| int r; |
| |
| if (rdev->gpu_lockup) { |
| return 0; |
| } |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| if (list_empty(&rdev->fence_drv.emited)) { |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return 0; |
| } |
| fence = list_entry(rdev->fence_drv.emited.prev, |
| struct radeon_fence, list); |
| radeon_fence_ref(fence); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| r = radeon_fence_wait(fence, false); |
| radeon_fence_unref(&fence); |
| return r; |
| } |
| |
| struct radeon_fence *radeon_fence_ref(struct radeon_fence *fence) |
| { |
| kref_get(&fence->kref); |
| return fence; |
| } |
| |
| void radeon_fence_unref(struct radeon_fence **fence) |
| { |
| struct radeon_fence *tmp = *fence; |
| |
| *fence = NULL; |
| if (tmp) { |
| kref_put(&tmp->kref, &radeon_fence_destroy); |
| } |
| } |
| |
| void radeon_fence_process(struct radeon_device *rdev) |
| { |
| unsigned long irq_flags; |
| bool wake; |
| |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| wake = radeon_fence_poll_locked(rdev); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| if (wake) { |
| wake_up_all(&rdev->fence_drv.queue); |
| } |
| } |
| |
| int radeon_fence_driver_init(struct radeon_device *rdev) |
| { |
| unsigned long irq_flags; |
| int r; |
| |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| r = radeon_scratch_get(rdev, &rdev->fence_drv.scratch_reg); |
| if (r) { |
| DRM_ERROR("Fence failed to get a scratch register."); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| return r; |
| } |
| WREG32(rdev->fence_drv.scratch_reg, 0); |
| atomic_set(&rdev->fence_drv.seq, 0); |
| INIT_LIST_HEAD(&rdev->fence_drv.created); |
| INIT_LIST_HEAD(&rdev->fence_drv.emited); |
| INIT_LIST_HEAD(&rdev->fence_drv.signaled); |
| rdev->fence_drv.count_timeout = 0; |
| init_waitqueue_head(&rdev->fence_drv.queue); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| if (radeon_debugfs_fence_init(rdev)) { |
| DRM_ERROR("Failed to register debugfs file for fence !\n"); |
| } |
| return 0; |
| } |
| |
| void radeon_fence_driver_fini(struct radeon_device *rdev) |
| { |
| unsigned long irq_flags; |
| |
| wake_up_all(&rdev->fence_drv.queue); |
| write_lock_irqsave(&rdev->fence_drv.lock, irq_flags); |
| radeon_scratch_free(rdev, rdev->fence_drv.scratch_reg); |
| write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags); |
| DRM_INFO("radeon: fence finalized\n"); |
| } |
| |
| |
| /* |
| * Fence debugfs |
| */ |
| #if defined(CONFIG_DEBUG_FS) |
| static int radeon_debugfs_fence_info(struct seq_file *m, void *data) |
| { |
| struct drm_info_node *node = (struct drm_info_node *)m->private; |
| struct drm_device *dev = node->minor->dev; |
| struct radeon_device *rdev = dev->dev_private; |
| struct radeon_fence *fence; |
| |
| seq_printf(m, "Last signaled fence 0x%08X\n", |
| RREG32(rdev->fence_drv.scratch_reg)); |
| if (!list_empty(&rdev->fence_drv.emited)) { |
| fence = list_entry(rdev->fence_drv.emited.prev, |
| struct radeon_fence, list); |
| seq_printf(m, "Last emited fence %p with 0x%08X\n", |
| fence, fence->seq); |
| } |
| return 0; |
| } |
| |
| static struct drm_info_list radeon_debugfs_fence_list[] = { |
| {"radeon_fence_info", &radeon_debugfs_fence_info, 0, NULL}, |
| }; |
| #endif |
| |
| int radeon_debugfs_fence_init(struct radeon_device *rdev) |
| { |
| #if defined(CONFIG_DEBUG_FS) |
| return radeon_debugfs_add_files(rdev, radeon_debugfs_fence_list, 1); |
| #else |
| return 0; |
| #endif |
| } |