drm/radeon: separate DMA code
Similar to separating the UVD code, just put the DMA
functions into separate files.
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/r600_dma.c b/drivers/gpu/drm/radeon/r600_dma.c
new file mode 100644
index 0000000..bff0557
--- /dev/null
+++ b/drivers/gpu/drm/radeon/r600_dma.c
@@ -0,0 +1,497 @@
+/*
+ * 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)
+{
+ return (radeon_ring_generic_get_rptr(rdev, ring) & 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(ring->wptr_reg) & 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(ring->wptr_reg, (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);
+
+ 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 = drm_order(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);
+
+ ring->rptr = RREG32(DMA_RB_RPTR) >> 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;
+ }
+
+ 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(ring);
+ return false;
+ }
+ /* force ring activities */
+ radeon_ring_force_activity(rdev, ring);
+ 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);
+
+ 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).
+ */
+void 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);
+}
+
+/**
+ * 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);
+ 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;
+ }
+
+ if (radeon_fence_need_sync(*fence, ring->idx)) {
+ radeon_semaphore_sync_rings(rdev, sem, (*fence)->ring,
+ ring->idx);
+ radeon_fence_note_sync(*fence, ring->idx);
+ } else {
+ radeon_semaphore_free(rdev, &sem, NULL);
+ }
+
+ 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);
+ return r;
+ }
+
+ radeon_ring_unlock_commit(rdev, ring);
+ radeon_semaphore_free(rdev, &sem, *fence);
+
+ return r;
+}