0,0 → 1,500 |
/* |
* Copyright 2013 Advanced Micro Devices, Inc. |
* |
* 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, sublicense, |
* 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 above copyright notice and this permission notice shall be included in |
* all copies or substantial portions of the Software. |
* |
* 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 NONINFRINGEMENT. IN NO EVENT SHALL |
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. |
* |
* Authors: Alex Deucher |
*/ |
#include <drm/drmP.h> |
#include "radeon.h" |
#include "radeon_asic.h" |
#include "r600d.h" |
|
u32 r600_gpu_check_soft_reset(struct radeon_device *rdev); |
|
/* |
* DMA |
* Starting with R600, the GPU has an asynchronous |
* DMA engine. The programming model is very similar |
* to the 3D engine (ring buffer, IBs, etc.), but the |
* DMA controller has it's own packet format that is |
* different form the PM4 format used by the 3D engine. |
* It supports copying data, writing embedded data, |
* solid fills, and a number of other things. It also |
* has support for tiling/detiling of buffers. |
*/ |
|
/** |
* r600_dma_get_rptr - get the current read pointer |
* |
* @rdev: radeon_device pointer |
* @ring: radeon ring pointer |
* |
* Get the current rptr from the hardware (r6xx+). |
*/ |
uint32_t r600_dma_get_rptr(struct radeon_device *rdev, |
struct radeon_ring *ring) |
{ |
u32 rptr; |
|
if (rdev->wb.enabled) |
rptr = rdev->wb.wb[ring->rptr_offs/4]; |
else |
rptr = RREG32(DMA_RB_RPTR); |
|
return (rptr & 0x3fffc) >> 2; |
} |
|
/** |
* r600_dma_get_wptr - get the current write pointer |
* |
* @rdev: radeon_device pointer |
* @ring: radeon ring pointer |
* |
* Get the current wptr from the hardware (r6xx+). |
*/ |
uint32_t r600_dma_get_wptr(struct radeon_device *rdev, |
struct radeon_ring *ring) |
{ |
return (RREG32(DMA_RB_WPTR) & 0x3fffc) >> 2; |
} |
|
/** |
* r600_dma_set_wptr - commit the write pointer |
* |
* @rdev: radeon_device pointer |
* @ring: radeon ring pointer |
* |
* Write the wptr back to the hardware (r6xx+). |
*/ |
void r600_dma_set_wptr(struct radeon_device *rdev, |
struct radeon_ring *ring) |
{ |
WREG32(DMA_RB_WPTR, (ring->wptr << 2) & 0x3fffc); |
} |
|
/** |
* r600_dma_stop - stop the async dma engine |
* |
* @rdev: radeon_device pointer |
* |
* Stop the async dma engine (r6xx-evergreen). |
*/ |
void r600_dma_stop(struct radeon_device *rdev) |
{ |
u32 rb_cntl = RREG32(DMA_RB_CNTL); |
|
if (rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) |
radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size); |
|
rb_cntl &= ~DMA_RB_ENABLE; |
WREG32(DMA_RB_CNTL, rb_cntl); |
|
rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false; |
} |
|
/** |
* r600_dma_resume - setup and start the async dma engine |
* |
* @rdev: radeon_device pointer |
* |
* Set up the DMA ring buffer and enable it. (r6xx-evergreen). |
* Returns 0 for success, error for failure. |
*/ |
int r600_dma_resume(struct radeon_device *rdev) |
{ |
struct radeon_ring *ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX]; |
u32 rb_cntl, dma_cntl, ib_cntl; |
u32 rb_bufsz; |
int r; |
|
/* Reset dma */ |
if (rdev->family >= CHIP_RV770) |
WREG32(SRBM_SOFT_RESET, RV770_SOFT_RESET_DMA); |
else |
WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA); |
RREG32(SRBM_SOFT_RESET); |
udelay(50); |
WREG32(SRBM_SOFT_RESET, 0); |
|
WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL, 0); |
WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL, 0); |
|
/* Set ring buffer size in dwords */ |
rb_bufsz = order_base_2(ring->ring_size / 4); |
rb_cntl = rb_bufsz << 1; |
#ifdef __BIG_ENDIAN |
rb_cntl |= DMA_RB_SWAP_ENABLE | DMA_RPTR_WRITEBACK_SWAP_ENABLE; |
#endif |
WREG32(DMA_RB_CNTL, rb_cntl); |
|
/* Initialize the ring buffer's read and write pointers */ |
WREG32(DMA_RB_RPTR, 0); |
WREG32(DMA_RB_WPTR, 0); |
|
/* set the wb address whether it's enabled or not */ |
WREG32(DMA_RB_RPTR_ADDR_HI, |
upper_32_bits(rdev->wb.gpu_addr + R600_WB_DMA_RPTR_OFFSET) & 0xFF); |
WREG32(DMA_RB_RPTR_ADDR_LO, |
((rdev->wb.gpu_addr + R600_WB_DMA_RPTR_OFFSET) & 0xFFFFFFFC)); |
|
if (rdev->wb.enabled) |
rb_cntl |= DMA_RPTR_WRITEBACK_ENABLE; |
|
WREG32(DMA_RB_BASE, ring->gpu_addr >> 8); |
|
/* enable DMA IBs */ |
ib_cntl = DMA_IB_ENABLE; |
#ifdef __BIG_ENDIAN |
ib_cntl |= DMA_IB_SWAP_ENABLE; |
#endif |
WREG32(DMA_IB_CNTL, ib_cntl); |
|
dma_cntl = RREG32(DMA_CNTL); |
dma_cntl &= ~CTXEMPTY_INT_ENABLE; |
WREG32(DMA_CNTL, dma_cntl); |
|
if (rdev->family >= CHIP_RV770) |
WREG32(DMA_MODE, 1); |
|
ring->wptr = 0; |
WREG32(DMA_RB_WPTR, ring->wptr << 2); |
|
WREG32(DMA_RB_CNTL, rb_cntl | DMA_RB_ENABLE); |
|
ring->ready = true; |
|
r = radeon_ring_test(rdev, R600_RING_TYPE_DMA_INDEX, ring); |
if (r) { |
ring->ready = false; |
return r; |
} |
|
if (rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) |
radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size); |
|
return 0; |
} |
|
/** |
* r600_dma_fini - tear down the async dma engine |
* |
* @rdev: radeon_device pointer |
* |
* Stop the async dma engine and free the ring (r6xx-evergreen). |
*/ |
void r600_dma_fini(struct radeon_device *rdev) |
{ |
r600_dma_stop(rdev); |
radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]); |
} |
|
/** |
* r600_dma_is_lockup - Check if the DMA engine is locked up |
* |
* @rdev: radeon_device pointer |
* @ring: radeon_ring structure holding ring information |
* |
* Check if the async DMA engine is locked up. |
* Returns true if the engine appears to be locked up, false if not. |
*/ |
bool r600_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring) |
{ |
u32 reset_mask = r600_gpu_check_soft_reset(rdev); |
|
if (!(reset_mask & RADEON_RESET_DMA)) { |
radeon_ring_lockup_update(rdev, ring); |
return false; |
} |
return radeon_ring_test_lockup(rdev, ring); |
} |
|
|
/** |
* r600_dma_ring_test - simple async dma engine test |
* |
* @rdev: radeon_device pointer |
* @ring: radeon_ring structure holding ring information |
* |
* Test the DMA engine by writing using it to write an |
* value to memory. (r6xx-SI). |
* Returns 0 for success, error for failure. |
*/ |
int r600_dma_ring_test(struct radeon_device *rdev, |
struct radeon_ring *ring) |
{ |
unsigned i; |
int r; |
void __iomem *ptr = (void *)rdev->vram_scratch.ptr; |
u32 tmp; |
|
if (!ptr) { |
DRM_ERROR("invalid vram scratch pointer\n"); |
return -EINVAL; |
} |
|
tmp = 0xCAFEDEAD; |
writel(tmp, ptr); |
|
r = radeon_ring_lock(rdev, ring, 4); |
if (r) { |
DRM_ERROR("radeon: dma failed to lock ring %d (%d).\n", ring->idx, r); |
return r; |
} |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1)); |
radeon_ring_write(ring, rdev->vram_scratch.gpu_addr & 0xfffffffc); |
radeon_ring_write(ring, upper_32_bits(rdev->vram_scratch.gpu_addr) & 0xff); |
radeon_ring_write(ring, 0xDEADBEEF); |
radeon_ring_unlock_commit(rdev, ring, false); |
|
for (i = 0; i < rdev->usec_timeout; i++) { |
tmp = readl(ptr); |
if (tmp == 0xDEADBEEF) |
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 (0x%08X)\n", |
ring->idx, tmp); |
r = -EINVAL; |
} |
return r; |
} |
|
/** |
* r600_dma_fence_ring_emit - emit a fence on the DMA ring |
* |
* @rdev: radeon_device pointer |
* @fence: radeon fence object |
* |
* Add a DMA fence packet to the ring to write |
* the fence seq number and DMA trap packet to generate |
* an interrupt if needed (r6xx-r7xx). |
*/ |
void r600_dma_fence_ring_emit(struct radeon_device *rdev, |
struct radeon_fence *fence) |
{ |
struct radeon_ring *ring = &rdev->ring[fence->ring]; |
u64 addr = rdev->fence_drv[fence->ring].gpu_addr; |
|
/* write the fence */ |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0)); |
radeon_ring_write(ring, addr & 0xfffffffc); |
radeon_ring_write(ring, (upper_32_bits(addr) & 0xff)); |
radeon_ring_write(ring, lower_32_bits(fence->seq)); |
/* generate an interrupt */ |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0, 0)); |
} |
|
/** |
* r600_dma_semaphore_ring_emit - emit a semaphore on the dma ring |
* |
* @rdev: radeon_device pointer |
* @ring: radeon_ring structure holding ring information |
* @semaphore: radeon semaphore object |
* @emit_wait: wait or signal semaphore |
* |
* Add a DMA semaphore packet to the ring wait on or signal |
* other rings (r6xx-SI). |
*/ |
bool r600_dma_semaphore_ring_emit(struct radeon_device *rdev, |
struct radeon_ring *ring, |
struct radeon_semaphore *semaphore, |
bool emit_wait) |
{ |
u64 addr = semaphore->gpu_addr; |
u32 s = emit_wait ? 0 : 1; |
|
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SEMAPHORE, 0, s, 0)); |
radeon_ring_write(ring, addr & 0xfffffffc); |
radeon_ring_write(ring, upper_32_bits(addr) & 0xff); |
|
return true; |
} |
|
/** |
* r600_dma_ib_test - test an IB on the DMA engine |
* |
* @rdev: radeon_device pointer |
* @ring: radeon_ring structure holding ring information |
* |
* Test a simple IB in the DMA ring (r6xx-SI). |
* Returns 0 on success, error on failure. |
*/ |
int r600_dma_ib_test(struct radeon_device *rdev, struct radeon_ring *ring) |
{ |
struct radeon_ib ib; |
unsigned i; |
int r; |
void __iomem *ptr = (void *)rdev->vram_scratch.ptr; |
u32 tmp = 0; |
|
if (!ptr) { |
DRM_ERROR("invalid vram scratch pointer\n"); |
return -EINVAL; |
} |
|
tmp = 0xCAFEDEAD; |
writel(tmp, ptr); |
|
r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256); |
if (r) { |
DRM_ERROR("radeon: failed to get ib (%d).\n", r); |
return r; |
} |
|
ib.ptr[0] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1); |
ib.ptr[1] = rdev->vram_scratch.gpu_addr & 0xfffffffc; |
ib.ptr[2] = upper_32_bits(rdev->vram_scratch.gpu_addr) & 0xff; |
ib.ptr[3] = 0xDEADBEEF; |
ib.length_dw = 4; |
|
r = radeon_ib_schedule(rdev, &ib, NULL, false); |
if (r) { |
radeon_ib_free(rdev, &ib); |
DRM_ERROR("radeon: failed to schedule ib (%d).\n", r); |
return r; |
} |
r = radeon_fence_wait(ib.fence, false); |
if (r) { |
DRM_ERROR("radeon: fence wait failed (%d).\n", r); |
return r; |
} |
for (i = 0; i < rdev->usec_timeout; i++) { |
tmp = readl(ptr); |
if (tmp == 0xDEADBEEF) |
break; |
DRM_UDELAY(1); |
} |
if (i < rdev->usec_timeout) { |
DRM_INFO("ib test on ring %d succeeded in %u usecs\n", ib.fence->ring, i); |
} else { |
DRM_ERROR("radeon: ib test failed (0x%08X)\n", tmp); |
r = -EINVAL; |
} |
radeon_ib_free(rdev, &ib); |
return r; |
} |
|
/** |
* r600_dma_ring_ib_execute - Schedule an IB on the DMA engine |
* |
* @rdev: radeon_device pointer |
* @ib: IB object to schedule |
* |
* Schedule an IB in the DMA ring (r6xx-r7xx). |
*/ |
void r600_dma_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib) |
{ |
struct radeon_ring *ring = &rdev->ring[ib->ring]; |
|
if (rdev->wb.enabled) { |
u32 next_rptr = ring->wptr + 4; |
while ((next_rptr & 7) != 5) |
next_rptr++; |
next_rptr += 3; |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1)); |
radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc); |
radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff); |
radeon_ring_write(ring, next_rptr); |
} |
|
/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring. |
* Pad as necessary with NOPs. |
*/ |
while ((ring->wptr & 7) != 5) |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0)); |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_INDIRECT_BUFFER, 0, 0, 0)); |
radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0)); |
radeon_ring_write(ring, (ib->length_dw << 16) | (upper_32_bits(ib->gpu_addr) & 0xFF)); |
|
} |
|
/** |
* r600_copy_dma - copy pages using the DMA engine |
* |
* @rdev: radeon_device pointer |
* @src_offset: src GPU address |
* @dst_offset: dst GPU address |
* @num_gpu_pages: number of GPU pages to xfer |
* @fence: radeon fence object |
* |
* Copy GPU paging using the DMA engine (r6xx). |
* Used by the radeon ttm implementation to move pages if |
* registered as the asic copy callback. |
*/ |
int r600_copy_dma(struct radeon_device *rdev, |
uint64_t src_offset, uint64_t dst_offset, |
unsigned num_gpu_pages, |
struct radeon_fence **fence) |
{ |
struct radeon_semaphore *sem = NULL; |
int ring_index = rdev->asic->copy.dma_ring_index; |
struct radeon_ring *ring = &rdev->ring[ring_index]; |
u32 size_in_dw, cur_size_in_dw; |
int i, num_loops; |
int r = 0; |
|
r = radeon_semaphore_create(rdev, &sem); |
if (r) { |
DRM_ERROR("radeon: moving bo (%d).\n", r); |
return r; |
} |
|
size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4; |
num_loops = DIV_ROUND_UP(size_in_dw, 0xFFFE); |
r = radeon_ring_lock(rdev, ring, num_loops * 4 + 8); |
if (r) { |
DRM_ERROR("radeon: moving bo (%d).\n", r); |
radeon_semaphore_free(rdev, &sem, NULL); |
return r; |
} |
|
radeon_semaphore_sync_to(sem, *fence); |
radeon_semaphore_sync_rings(rdev, sem, ring->idx); |
|
for (i = 0; i < num_loops; i++) { |
cur_size_in_dw = size_in_dw; |
if (cur_size_in_dw > 0xFFFE) |
cur_size_in_dw = 0xFFFE; |
size_in_dw -= cur_size_in_dw; |
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, 0, cur_size_in_dw)); |
radeon_ring_write(ring, dst_offset & 0xfffffffc); |
radeon_ring_write(ring, src_offset & 0xfffffffc); |
radeon_ring_write(ring, (((upper_32_bits(dst_offset) & 0xff) << 16) | |
(upper_32_bits(src_offset) & 0xff))); |
src_offset += cur_size_in_dw * 4; |
dst_offset += cur_size_in_dw * 4; |
} |
|
r = radeon_fence_emit(rdev, fence, ring->idx); |
if (r) { |
radeon_ring_unlock_undo(rdev, ring); |
radeon_semaphore_free(rdev, &sem, NULL); |
return r; |
} |
|
radeon_ring_unlock_commit(rdev, ring, false); |
radeon_semaphore_free(rdev, &sem, *fence); |
|
return r; |
} |