/* * 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 <linux/firmware.h>
/* * sDMA - System DMA * Starting with CIK, the GPU has new asynchronous * DMA engines. These engines are used for compute * and gfx. There are two DMA engines (SDMA0, SDMA1) * and each one supports 1 ring buffer used for gfx * and 2 queues used for compute. * * The programming model is very similar to the CP * (ring buffer, IBs, etc.), but sDMA has it's own * packet format that is different from the PM4 format * used by the CP. sDMA supports copying data, writing * embedded data, solid fills, and a number of other * things. It also has support for tiling/detiling of * buffers.
*/
/** * cik_sdma_get_rptr - get the current read pointer * * @rdev: radeon_device pointer * @ring: radeon ring pointer * * Get the current rptr from the hardware (CIK+).
*/
uint32_t cik_sdma_get_rptr(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 rptr, reg;
/** * cik_sdma_get_wptr - get the current write pointer * * @rdev: radeon_device pointer * @ring: radeon ring pointer * * Get the current wptr from the hardware (CIK+).
*/
uint32_t cik_sdma_get_wptr(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 reg;
/** * cik_sdma_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 (CIK).
*/ void cik_sdma_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;
/** * cik_sdma_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 (CIK).
*/ bool cik_sdma_semaphore_ring_emit(struct radeon_device *rdev, struct radeon_ring *ring, struct radeon_semaphore *semaphore, bool emit_wait)
{
u64 addr = semaphore->gpu_addr;
u32 extra_bits = emit_wait ? 0 : SDMA_SEMAPHORE_EXTRA_S;
/** * cik_sdma_gfx_stop - stop the gfx async dma engines * * @rdev: radeon_device pointer * * Stop the gfx async dma ring buffers (CIK).
*/ staticvoid cik_sdma_gfx_stop(struct radeon_device *rdev)
{
u32 rb_cntl, reg_offset; int i;
if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
for (i = 0; i < 2; i++) { if (i == 0)
reg_offset = SDMA0_REGISTER_OFFSET; else
reg_offset = SDMA1_REGISTER_OFFSET;
rb_cntl = RREG32(SDMA0_GFX_RB_CNTL + reg_offset);
rb_cntl &= ~SDMA_RB_ENABLE;
WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
WREG32(SDMA0_GFX_IB_CNTL + reg_offset, 0);
}
rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false;
rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false;
/* FIXME use something else than big hammer but after few days can not * seem to find good combination so reset SDMA blocks as it seems we * do not shut them down properly. This fix hibernation and does not * affect suspend to ram.
*/
WREG32(SRBM_SOFT_RESET, SOFT_RESET_SDMA | SOFT_RESET_SDMA1);
(void)RREG32(SRBM_SOFT_RESET);
udelay(50);
WREG32(SRBM_SOFT_RESET, 0);
(void)RREG32(SRBM_SOFT_RESET);
}
/** * cik_sdma_ctx_switch_enable - enable/disable sdma engine preemption * * @rdev: radeon_device pointer * @enable: enable/disable preemption. * * Halt or unhalt the async dma engines (CIK).
*/ staticvoid cik_sdma_ctx_switch_enable(struct radeon_device *rdev, bool enable)
{
uint32_t reg_offset, value; int i;
for (i = 0; i < 2; i++) { if (i == 0)
reg_offset = SDMA0_REGISTER_OFFSET; else
reg_offset = SDMA1_REGISTER_OFFSET;
value = RREG32(SDMA0_CNTL + reg_offset); if (enable)
value |= AUTO_CTXSW_ENABLE; else
value &= ~AUTO_CTXSW_ENABLE;
WREG32(SDMA0_CNTL + reg_offset, value);
}
}
/** * cik_sdma_enable - stop the async dma engines * * @rdev: radeon_device pointer * @enable: enable/disable the DMA MEs. * * Halt or unhalt the async dma engines (CIK).
*/ void cik_sdma_enable(struct radeon_device *rdev, bool enable)
{
u32 me_cntl, reg_offset; int i;
if (!enable) {
cik_sdma_gfx_stop(rdev);
cik_sdma_rlc_stop(rdev);
}
for (i = 0; i < 2; i++) { if (i == 0)
reg_offset = SDMA0_REGISTER_OFFSET; else
reg_offset = SDMA1_REGISTER_OFFSET;
me_cntl = RREG32(SDMA0_ME_CNTL + reg_offset); if (enable)
me_cntl &= ~SDMA_HALT; else
me_cntl |= SDMA_HALT;
WREG32(SDMA0_ME_CNTL + reg_offset, me_cntl);
}
cik_sdma_ctx_switch_enable(rdev, enable);
}
/** * cik_sdma_gfx_resume - setup and start the async dma engines * * @rdev: radeon_device pointer * * Set up the gfx DMA ring buffers and enable them (CIK). * Returns 0 for success, error for failure.
*/ staticint cik_sdma_gfx_resume(struct radeon_device *rdev)
{ struct radeon_ring *ring;
u32 rb_cntl, ib_cntl;
u32 rb_bufsz;
u32 reg_offset, wb_offset; int i, r;
for (i = 0; i < 2; i++) { if (i == 0) {
ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
reg_offset = SDMA0_REGISTER_OFFSET;
wb_offset = R600_WB_DMA_RPTR_OFFSET;
} else {
ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
reg_offset = SDMA1_REGISTER_OFFSET;
wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
}
r = radeon_ring_test(rdev, ring->idx, ring); if (r) {
ring->ready = false; return r;
}
}
if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
return 0;
}
/** * cik_sdma_rlc_resume - setup and start the async dma engines * * @rdev: radeon_device pointer * * Set up the compute DMA queues and enable them (CIK). * Returns 0 for success, error for failure.
*/ staticint cik_sdma_rlc_resume(struct radeon_device *rdev)
{ /* XXX todo */ return 0;
}
/** * cik_sdma_load_microcode - load the sDMA ME ucode * * @rdev: radeon_device pointer * * Loads the sDMA0/1 ucode. * Returns 0 for success, -EINVAL if the ucode is not available.
*/ staticint cik_sdma_load_microcode(struct radeon_device *rdev)
{ int i;
/** * cik_sdma_resume - setup and start the async dma engines * * @rdev: radeon_device pointer * * Set up the DMA engines and enable them (CIK). * Returns 0 for success, error for failure.
*/ int cik_sdma_resume(struct radeon_device *rdev)
{ int r;
r = cik_sdma_load_microcode(rdev); if (r) return r;
/* unhalt the MEs */
cik_sdma_enable(rdev, true);
/* start the gfx rings and rlc compute queues */
r = cik_sdma_gfx_resume(rdev); if (r) return r;
r = cik_sdma_rlc_resume(rdev); if (r) return r;
return 0;
}
/** * cik_sdma_fini - tear down the async dma engines * * @rdev: radeon_device pointer * * Stop the async dma engines and free the rings (CIK).
*/ void cik_sdma_fini(struct radeon_device *rdev)
{ /* halt the MEs */
cik_sdma_enable(rdev, false);
radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]); /* XXX - compute dma queue tear down */
}
/** * cik_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 * @resv: reservation object to sync to * * Copy GPU paging using the DMA engine (CIK). * Used by the radeon ttm implementation to move pages if * registered as the asic copy callback.
*/ struct radeon_fence *cik_copy_dma(struct radeon_device *rdev,
uint64_t src_offset, uint64_t dst_offset, unsigned num_gpu_pages, struct dma_resv *resv)
{ struct radeon_fence *fence; struct radeon_sync sync; int ring_index = rdev->asic->copy.dma_ring_index; struct radeon_ring *ring = &rdev->ring[ring_index];
u32 size_in_bytes, cur_size_in_bytes; int i, num_loops; int r = 0;
/** * cik_sdma_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. (CIK). * Returns 0 for success, error for failure.
*/ int cik_sdma_ring_test(struct radeon_device *rdev, struct radeon_ring *ring)
{ unsigned i; int r; unsigned index;
u32 tmp;
u64 gpu_addr;
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
index = R600_WB_DMA_RING_TEST_OFFSET; else
index = CAYMAN_WB_DMA1_RING_TEST_OFFSET;
r = radeon_ring_lock(rdev, ring, 5); if (r) {
DRM_ERROR("radeon: dma failed to lock ring %d (%d).\n", ring->idx, r); return r;
}
radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
radeon_ring_write(ring, lower_32_bits(gpu_addr));
radeon_ring_write(ring, upper_32_bits(gpu_addr));
radeon_ring_write(ring, 1); /* number of DWs to follow */
radeon_ring_write(ring, 0xDEADBEEF);
radeon_ring_unlock_commit(rdev, ring, false);
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = le32_to_cpu(rdev->wb.wb[index/4]); if (tmp == 0xDEADBEEF) break;
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;
}
/** * cik_sdma_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 (CIK). * Returns 0 on success, error on failure.
*/ int cik_sdma_ib_test(struct radeon_device *rdev, struct radeon_ring *ring)
{ struct radeon_ib ib; unsigned i; unsigned index; int r;
u32 tmp = 0;
u64 gpu_addr;
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
index = R600_WB_DMA_RING_TEST_OFFSET; else
index = CAYMAN_WB_DMA1_RING_TEST_OFFSET;
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_timeout(ib.fence, false, usecs_to_jiffies(
RADEON_USEC_IB_TEST_TIMEOUT)); if (r < 0) {
DRM_ERROR("radeon: fence wait failed (%d).\n", r); return r;
} elseif (r == 0) {
DRM_ERROR("radeon: fence wait timed out.\n"); return -ETIMEDOUT;
}
r = 0; for (i = 0; i < rdev->usec_timeout; i++) {
tmp = le32_to_cpu(rdev->wb.wb[index/4]); if (tmp == 0xDEADBEEF) break;
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;
}
/** * cik_sdma_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 (CIK). * Returns true if the engine appears to be locked up, false if not.
*/ bool cik_sdma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 reset_mask = cik_gpu_check_soft_reset(rdev);
u32 mask;
/** * cik_sdma_vm_copy_pages - update PTEs by copying them from the GART * * @rdev: radeon_device pointer * @ib: indirect buffer to fill with commands * @pe: addr of the page entry * @src: src addr to copy from * @count: number of page entries to update * * Update PTEs by copying them from the GART using sDMA (CIK).
*/ void cik_sdma_vm_copy_pages(struct radeon_device *rdev, struct radeon_ib *ib,
uint64_t pe, uint64_t src, unsigned count)
{ while (count) { unsigned bytes = count * 8; if (bytes > 0x1FFFF8)
bytes = 0x1FFFF8;
/** * cik_sdma_vm_pad_ib - pad the IB to the required number of dw * * @ib: indirect buffer to fill with padding *
*/ void cik_sdma_vm_pad_ib(struct radeon_ib *ib)
{ while (ib->length_dw & 0x7)
ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0);
}
/* * cik_dma_vm_flush - cik vm flush using sDMA * * Update the page table base and flush the VM TLB * using sDMA (CIK).
*/ void cik_dma_vm_flush(struct radeon_device *rdev, struct radeon_ring *ring, unsigned vm_id, uint64_t pd_addr)
{
u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(0) |
SDMA_POLL_REG_MEM_EXTRA_FUNC(0)); /* always */
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