/* * Copyright 2013 Advanced Micro Devices, Inc. * 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: Christian König <christian.koenig@amd.com> */ #include <linux/firmware.h> #include <linux/module.h> #include <drm/drmP.h> #include <drm/drm.h> #include "radeon.h" #include "radeon_asic.h" #include "sid.h" /* 1 second timeout */ #define VCE_IDLE_TIMEOUT_MS 1000 /* Firmware Names */ #define FIRMWARE_TAHITI "radeon/TAHITI_vce.bin" #define FIRMWARE_BONAIRE "radeon/BONAIRE_vce.bin" MODULE_FIRMWARE(FIRMWARE_TAHITI); MODULE_FIRMWARE(FIRMWARE_BONAIRE); static void radeon_vce_idle_work_handler(struct work_struct *work); /** * radeon_vce_init - allocate memory, load vce firmware * * @rdev: radeon_device pointer * * First step to get VCE online, allocate memory and load the firmware */ int radeon_vce_init(struct radeon_device *rdev) { static const char *fw_version = "[ATI LIB=VCEFW,"; static const char *fb_version = "[ATI LIB=VCEFWSTATS,"; unsigned long size; const char *fw_name, *c; uint8_t start, mid, end; int i, r; INIT_DELAYED_WORK(&rdev->vce.idle_work, radeon_vce_idle_work_handler); switch (rdev->family) { case CHIP_TAHITI: case CHIP_PITCAIRN: case CHIP_VERDE: case CHIP_OLAND: case CHIP_ARUBA: fw_name = FIRMWARE_TAHITI; break; case CHIP_BONAIRE: case CHIP_KAVERI: case CHIP_KABINI: case CHIP_HAWAII: case CHIP_MULLINS: fw_name = FIRMWARE_BONAIRE; break; default: return -EINVAL; } r = request_firmware(&rdev->vce_fw, fw_name, rdev->dev); if (r) { dev_err(rdev->dev, "radeon_vce: Can't load firmware \"%s\"\n", fw_name); return r; } /* search for firmware version */ size = rdev->vce_fw->size - strlen(fw_version) - 9; c = rdev->vce_fw->data; for (;size > 0; --size, ++c) if (strncmp(c, fw_version, strlen(fw_version)) == 0) break; if (size == 0) return -EINVAL; c += strlen(fw_version); if (sscanf(c, "%2hhd.%2hhd.%2hhd]", &start, &mid, &end) != 3) return -EINVAL; /* search for feedback version */ size = rdev->vce_fw->size - strlen(fb_version) - 3; c = rdev->vce_fw->data; for (;size > 0; --size, ++c) if (strncmp(c, fb_version, strlen(fb_version)) == 0) break; if (size == 0) return -EINVAL; c += strlen(fb_version); if (sscanf(c, "%2u]", &rdev->vce.fb_version) != 1) return -EINVAL; DRM_INFO("Found VCE firmware/feedback version %hhd.%hhd.%hhd / %d!\n", start, mid, end, rdev->vce.fb_version); rdev->vce.fw_version = (start << 24) | (mid << 16) | (end << 8); /* we can only work with this fw version for now */ if ((rdev->vce.fw_version != ((40 << 24) | (2 << 16) | (2 << 8))) && (rdev->vce.fw_version != ((50 << 24) | (0 << 16) | (1 << 8))) && (rdev->vce.fw_version != ((50 << 24) | (1 << 16) | (2 << 8)))) return -EINVAL; /* allocate firmware, stack and heap BO */ if (rdev->family < CHIP_BONAIRE) size = vce_v1_0_bo_size(rdev); else size = vce_v2_0_bo_size(rdev); r = radeon_bo_create(rdev, size, PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM, 0, NULL, NULL, &rdev->vce.vcpu_bo); if (r) { dev_err(rdev->dev, "(%d) failed to allocate VCE bo\n", r); return r; } r = radeon_bo_reserve(rdev->vce.vcpu_bo, false); if (r) { radeon_bo_unref(&rdev->vce.vcpu_bo); dev_err(rdev->dev, "(%d) failed to reserve VCE bo\n", r); return r; } r = radeon_bo_pin(rdev->vce.vcpu_bo, RADEON_GEM_DOMAIN_VRAM, &rdev->vce.gpu_addr); radeon_bo_unreserve(rdev->vce.vcpu_bo); if (r) { radeon_bo_unref(&rdev->vce.vcpu_bo); dev_err(rdev->dev, "(%d) VCE bo pin failed\n", r); return r; } for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) { atomic_set(&rdev->vce.handles[i], 0); rdev->vce.filp[i] = NULL; } return 0; } /** * radeon_vce_fini - free memory * * @rdev: radeon_device pointer * * Last step on VCE teardown, free firmware memory */ void radeon_vce_fini(struct radeon_device *rdev) { if (rdev->vce.vcpu_bo == NULL) return; radeon_bo_unref(&rdev->vce.vcpu_bo); release_firmware(rdev->vce_fw); } /** * radeon_vce_suspend - unpin VCE fw memory * * @rdev: radeon_device pointer * */ int radeon_vce_suspend(struct radeon_device *rdev) { int i; if (rdev->vce.vcpu_bo == NULL) return 0; for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) if (atomic_read(&rdev->vce.handles[i])) break; if (i == RADEON_MAX_VCE_HANDLES) return 0; /* TODO: suspending running encoding sessions isn't supported */ return -EINVAL; } /** * radeon_vce_resume - pin VCE fw memory * * @rdev: radeon_device pointer * */ int radeon_vce_resume(struct radeon_device *rdev) { void *cpu_addr; int r; if (rdev->vce.vcpu_bo == NULL) return -EINVAL; r = radeon_bo_reserve(rdev->vce.vcpu_bo, false); if (r) { dev_err(rdev->dev, "(%d) failed to reserve VCE bo\n", r); return r; } r = radeon_bo_kmap(rdev->vce.vcpu_bo, &cpu_addr); if (r) { radeon_bo_unreserve(rdev->vce.vcpu_bo); dev_err(rdev->dev, "(%d) VCE map failed\n", r); return r; } memset(cpu_addr, 0, radeon_bo_size(rdev->vce.vcpu_bo)); if (rdev->family < CHIP_BONAIRE) r = vce_v1_0_load_fw(rdev, cpu_addr); else memcpy(cpu_addr, rdev->vce_fw->data, rdev->vce_fw->size); radeon_bo_kunmap(rdev->vce.vcpu_bo); radeon_bo_unreserve(rdev->vce.vcpu_bo); return r; } /** * radeon_vce_idle_work_handler - power off VCE * * @work: pointer to work structure * * power of VCE when it's not used any more */ static void radeon_vce_idle_work_handler(struct work_struct *work) { struct radeon_device *rdev = container_of(work, struct radeon_device, vce.idle_work.work); if ((radeon_fence_count_emitted(rdev, TN_RING_TYPE_VCE1_INDEX) == 0) && (radeon_fence_count_emitted(rdev, TN_RING_TYPE_VCE2_INDEX) == 0)) { if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) { radeon_dpm_enable_vce(rdev, false); } else { radeon_set_vce_clocks(rdev, 0, 0); } } else { schedule_delayed_work(&rdev->vce.idle_work, msecs_to_jiffies(VCE_IDLE_TIMEOUT_MS)); } } /** * radeon_vce_note_usage - power up VCE * * @rdev: radeon_device pointer * * Make sure VCE is powerd up when we want to use it */ void radeon_vce_note_usage(struct radeon_device *rdev) { bool streams_changed = false; bool set_clocks = !cancel_delayed_work_sync(&rdev->vce.idle_work); set_clocks &= schedule_delayed_work(&rdev->vce.idle_work, msecs_to_jiffies(VCE_IDLE_TIMEOUT_MS)); if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) { /* XXX figure out if the streams changed */ streams_changed = false; } if (set_clocks || streams_changed) { if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) { radeon_dpm_enable_vce(rdev, true); } else { radeon_set_vce_clocks(rdev, 53300, 40000); } } } /** * radeon_vce_free_handles - free still open VCE handles * * @rdev: radeon_device pointer * @filp: drm file pointer * * Close all VCE handles still open by this file pointer */ void radeon_vce_free_handles(struct radeon_device *rdev, struct drm_file *filp) { int i, r; for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) { uint32_t handle = atomic_read(&rdev->vce.handles[i]); if (!handle || rdev->vce.filp[i] != filp) continue; radeon_vce_note_usage(rdev); r = radeon_vce_get_destroy_msg(rdev, TN_RING_TYPE_VCE1_INDEX, handle, NULL); if (r) DRM_ERROR("Error destroying VCE handle (%d)!\n", r); rdev->vce.filp[i] = NULL; atomic_set(&rdev->vce.handles[i], 0); } } /** * radeon_vce_get_create_msg - generate a VCE create msg * * @rdev: radeon_device pointer * @ring: ring we should submit the msg to * @handle: VCE session handle to use * @fence: optional fence to return * * Open up a stream for HW test */ int radeon_vce_get_create_msg(struct radeon_device *rdev, int ring, uint32_t handle, struct radeon_fence **fence) { const unsigned ib_size_dw = 1024; struct radeon_ib ib; uint64_t dummy; int i, r; r = radeon_ib_get(rdev, ring, &ib, NULL, ib_size_dw * 4); if (r) { DRM_ERROR("radeon: failed to get ib (%d).\n", r); return r; } dummy = ib.gpu_addr + 1024; /* stitch together an VCE create msg */ ib.length_dw = 0; ib.ptr[ib.length_dw++] = cpu_to_le32(0x0000000c); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000001); /* session cmd */ ib.ptr[ib.length_dw++] = cpu_to_le32(handle); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000030); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x01000001); /* create cmd */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000000); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000042); ib.ptr[ib.length_dw++] = cpu_to_le32(0x0000000a); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000001); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000080); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000060); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000100); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000100); ib.ptr[ib.length_dw++] = cpu_to_le32(0x0000000c); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000000); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000014); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x05000005); /* feedback buffer */ ib.ptr[ib.length_dw++] = cpu_to_le32(upper_32_bits(dummy)); ib.ptr[ib.length_dw++] = cpu_to_le32(dummy); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000001); for (i = ib.length_dw; i < ib_size_dw; ++i) ib.ptr[i] = cpu_to_le32(0x0); r = radeon_ib_schedule(rdev, &ib, NULL, false); if (r) { DRM_ERROR("radeon: failed to schedule ib (%d).\n", r); } if (fence) *fence = radeon_fence_ref(ib.fence); radeon_ib_free(rdev, &ib); return r; } /** * radeon_vce_get_destroy_msg - generate a VCE destroy msg * * @rdev: radeon_device pointer * @ring: ring we should submit the msg to * @handle: VCE session handle to use * @fence: optional fence to return * * Close up a stream for HW test or if userspace failed to do so */ int radeon_vce_get_destroy_msg(struct radeon_device *rdev, int ring, uint32_t handle, struct radeon_fence **fence) { const unsigned ib_size_dw = 1024; struct radeon_ib ib; uint64_t dummy; int i, r; r = radeon_ib_get(rdev, ring, &ib, NULL, ib_size_dw * 4); if (r) { DRM_ERROR("radeon: failed to get ib (%d).\n", r); return r; } dummy = ib.gpu_addr + 1024; /* stitch together an VCE destroy msg */ ib.length_dw = 0; ib.ptr[ib.length_dw++] = cpu_to_le32(0x0000000c); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000001); /* session cmd */ ib.ptr[ib.length_dw++] = cpu_to_le32(handle); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000014); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x05000005); /* feedback buffer */ ib.ptr[ib.length_dw++] = cpu_to_le32(upper_32_bits(dummy)); ib.ptr[ib.length_dw++] = cpu_to_le32(dummy); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000001); ib.ptr[ib.length_dw++] = cpu_to_le32(0x00000008); /* len */ ib.ptr[ib.length_dw++] = cpu_to_le32(0x02000001); /* destroy cmd */ for (i = ib.length_dw; i < ib_size_dw; ++i) ib.ptr[i] = cpu_to_le32(0x0); r = radeon_ib_schedule(rdev, &ib, NULL, false); if (r) { DRM_ERROR("radeon: failed to schedule ib (%d).\n", r); } if (fence) *fence = radeon_fence_ref(ib.fence); radeon_ib_free(rdev, &ib); return r; } /** * radeon_vce_cs_reloc - command submission relocation * * @p: parser context * @lo: address of lower dword * @hi: address of higher dword * @size: size of checker for relocation buffer * * Patch relocation inside command stream with real buffer address */ int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi, unsigned size) { struct radeon_cs_chunk *relocs_chunk; struct radeon_bo_list *reloc; uint64_t start, end, offset; unsigned idx; relocs_chunk = p->chunk_relocs; offset = radeon_get_ib_value(p, lo); idx = radeon_get_ib_value(p, hi); if (idx >= relocs_chunk->length_dw) { DRM_ERROR("Relocs at %d after relocations chunk end %d !\n", idx, relocs_chunk->length_dw); return -EINVAL; } reloc = &p->relocs[(idx / 4)]; start = reloc->gpu_offset; end = start + radeon_bo_size(reloc->robj); start += offset; p->ib.ptr[lo] = start & 0xFFFFFFFF; p->ib.ptr[hi] = start >> 32; if (end <= start) { DRM_ERROR("invalid reloc offset %llX!\n", offset); return -EINVAL; } if ((end - start) < size) { DRM_ERROR("buffer to small (%d / %d)!\n", (unsigned)(end - start), size); return -EINVAL; } return 0; } /** * radeon_vce_validate_handle - validate stream handle * * @p: parser context * @handle: handle to validate * @allocated: allocated a new handle? * * Validates the handle and return the found session index or -EINVAL * we we don't have another free session index. */ static int radeon_vce_validate_handle(struct radeon_cs_parser *p, uint32_t handle, bool *allocated) { unsigned i; *allocated = false; /* validate the handle */ for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) { if (atomic_read(&p->rdev->vce.handles[i]) == handle) { if (p->rdev->vce.filp[i] != p->filp) { DRM_ERROR("VCE handle collision detected!\n"); return -EINVAL; } return i; } } /* handle not found try to alloc a new one */ for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) { if (!atomic_cmpxchg(&p->rdev->vce.handles[i], 0, handle)) { p->rdev->vce.filp[i] = p->filp; p->rdev->vce.img_size[i] = 0; *allocated = true; return i; } } DRM_ERROR("No more free VCE handles!\n"); return -EINVAL; } /** * radeon_vce_cs_parse - parse and validate the command stream * * @p: parser context * */ int radeon_vce_cs_parse(struct radeon_cs_parser *p) { int session_idx = -1; bool destroyed = false, created = false, allocated = false; uint32_t tmp, handle = 0; uint32_t *size = &tmp; int i, r = 0; while (p->idx < p->chunk_ib->length_dw) { uint32_t len = radeon_get_ib_value(p, p->idx); uint32_t cmd = radeon_get_ib_value(p, p->idx + 1); if ((len < 8) || (len & 3)) { DRM_ERROR("invalid VCE command length (%d)!\n", len); r = -EINVAL; goto out; } if (destroyed) { DRM_ERROR("No other command allowed after destroy!\n"); r = -EINVAL; goto out; } switch (cmd) { case 0x00000001: // session handle = radeon_get_ib_value(p, p->idx + 2); session_idx = radeon_vce_validate_handle(p, handle, &allocated); if (session_idx < 0) return session_idx; size = &p->rdev->vce.img_size[session_idx]; break; case 0x00000002: // task info break; case 0x01000001: // create created = true; if (!allocated) { DRM_ERROR("Handle already in use!\n"); r = -EINVAL; goto out; } *size = radeon_get_ib_value(p, p->idx + 8) * radeon_get_ib_value(p, p->idx + 10) * 8 * 3 / 2; break; case 0x04000001: // config extension case 0x04000002: // pic control case 0x04000005: // rate control case 0x04000007: // motion estimation case 0x04000008: // rdo case 0x04000009: // vui break; case 0x03000001: // encode r = radeon_vce_cs_reloc(p, p->idx + 10, p->idx + 9, *size); if (r) goto out; r = radeon_vce_cs_reloc(p, p->idx + 12, p->idx + 11, *size / 3); if (r) goto out; break; case 0x02000001: // destroy destroyed = true; break; case 0x05000001: // context buffer r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2, *size * 2); if (r) goto out; break; case 0x05000004: // video bitstream buffer tmp = radeon_get_ib_value(p, p->idx + 4); r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2, tmp); if (r) goto out; break; case 0x05000005: // feedback buffer r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2, 4096); if (r) goto out; break; default: DRM_ERROR("invalid VCE command (0x%x)!\n", cmd); r = -EINVAL; goto out; } if (session_idx == -1) { DRM_ERROR("no session command at start of IB\n"); r = -EINVAL; goto out; } p->idx += len / 4; } if (allocated && !created) { DRM_ERROR("New session without create command!\n"); r = -ENOENT; } out: if ((!r && destroyed) || (r && allocated)) { /* * IB contains a destroy msg or we have allocated an * handle and got an error, anyway free the handle */ for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) atomic_cmpxchg(&p->rdev->vce.handles[i], handle, 0); } return r; } /** * radeon_vce_semaphore_emit - emit a semaphore command * * @rdev: radeon_device pointer * @ring: engine to use * @semaphore: address of semaphore * @emit_wait: true=emit wait, false=emit signal * */ bool radeon_vce_semaphore_emit(struct radeon_device *rdev, struct radeon_ring *ring, struct radeon_semaphore *semaphore, bool emit_wait) { uint64_t addr = semaphore->gpu_addr; radeon_ring_write(ring, cpu_to_le32(VCE_CMD_SEMAPHORE)); radeon_ring_write(ring, cpu_to_le32((addr >> 3) & 0x000FFFFF)); radeon_ring_write(ring, cpu_to_le32((addr >> 23) & 0x000FFFFF)); radeon_ring_write(ring, cpu_to_le32(0x01003000 | (emit_wait ? 1 : 0))); if (!emit_wait) radeon_ring_write(ring, cpu_to_le32(VCE_CMD_END)); return true; } /** * radeon_vce_ib_execute - execute indirect buffer * * @rdev: radeon_device pointer * @ib: the IB to execute * */ void radeon_vce_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib) { struct radeon_ring *ring = &rdev->ring[ib->ring]; radeon_ring_write(ring, cpu_to_le32(VCE_CMD_IB)); radeon_ring_write(ring, cpu_to_le32(ib->gpu_addr)); radeon_ring_write(ring, cpu_to_le32(upper_32_bits(ib->gpu_addr))); radeon_ring_write(ring, cpu_to_le32(ib->length_dw)); } /** * radeon_vce_fence_emit - add a fence command to the ring * * @rdev: radeon_device pointer * @fence: the fence * */ void radeon_vce_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence) { struct radeon_ring *ring = &rdev->ring[fence->ring]; uint64_t addr = rdev->fence_drv[fence->ring].gpu_addr; radeon_ring_write(ring, cpu_to_le32(VCE_CMD_FENCE)); radeon_ring_write(ring, cpu_to_le32(addr)); radeon_ring_write(ring, cpu_to_le32(upper_32_bits(addr))); radeon_ring_write(ring, cpu_to_le32(fence->seq)); radeon_ring_write(ring, cpu_to_le32(VCE_CMD_TRAP)); radeon_ring_write(ring, cpu_to_le32(VCE_CMD_END)); } /** * radeon_vce_ring_test - test if VCE ring is working * * @rdev: radeon_device pointer * @ring: the engine to test on * */ int radeon_vce_ring_test(struct radeon_device *rdev, struct radeon_ring *ring) { uint32_t rptr = vce_v1_0_get_rptr(rdev, ring); unsigned i; int r; r = radeon_ring_lock(rdev, ring, 16); if (r) { DRM_ERROR("radeon: vce failed to lock ring %d (%d).\n", ring->idx, r); return r; } radeon_ring_write(ring, cpu_to_le32(VCE_CMD_END)); radeon_ring_unlock_commit(rdev, ring, false); for (i = 0; i < rdev->usec_timeout; i++) { if (vce_v1_0_get_rptr(rdev, ring) != rptr) break; DRM_UDELAY(1); } if (i < rdev->usec_timeout) { DRM_INFO("ring test on %d succeeded in %d usecs\n", ring->idx, i); } else { DRM_ERROR("radeon: ring %d test failed\n", ring->idx); r = -ETIMEDOUT; } return r; } /** * radeon_vce_ib_test - test if VCE IBs are working * * @rdev: radeon_device pointer * @ring: the engine to test on * */ int radeon_vce_ib_test(struct radeon_device *rdev, struct radeon_ring *ring) { struct radeon_fence *fence = NULL; int r; r = radeon_vce_get_create_msg(rdev, ring->idx, 1, NULL); if (r) { DRM_ERROR("radeon: failed to get create msg (%d).\n", r); goto error; } r = radeon_vce_get_destroy_msg(rdev, ring->idx, 1, &fence); if (r) { DRM_ERROR("radeon: failed to get destroy ib (%d).\n", r); goto error; } r = radeon_fence_wait(fence, false); if (r) { DRM_ERROR("radeon: fence wait failed (%d).\n", r); } else { DRM_INFO("ib test on ring %d succeeded\n", ring->idx); } error: radeon_fence_unref(&fence); return r; }