drm/radeon/kms: Add initial support for async DMA on SI
Pretty much the same as cayman. Some changes to the copy
packets.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 38b6fa3..5d68346 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -797,6 +797,10 @@
int r600_dma_resume(struct radeon_device *rdev);
void r600_dma_fini(struct radeon_device *rdev);
+void cayman_dma_stop(struct radeon_device *rdev);
+int cayman_dma_resume(struct radeon_device *rdev);
+void cayman_dma_fini(struct radeon_device *rdev);
+
/*
* CS.
*/
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 8cf8ae8..d455bcb 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1731,6 +1731,26 @@
.ib_test = &r600_ib_test,
.is_lockup = &si_gpu_is_lockup,
.vm_flush = &si_vm_flush,
+ },
+ [R600_RING_TYPE_DMA_INDEX] = {
+ .ib_execute = &cayman_dma_ring_ib_execute,
+ .emit_fence = &evergreen_dma_fence_ring_emit,
+ .emit_semaphore = &r600_dma_semaphore_ring_emit,
+ .cs_parse = NULL,
+ .ring_test = &r600_dma_ring_test,
+ .ib_test = &r600_dma_ib_test,
+ .is_lockup = &cayman_dma_is_lockup,
+ .vm_flush = &si_dma_vm_flush,
+ },
+ [CAYMAN_RING_TYPE_DMA1_INDEX] = {
+ .ib_execute = &cayman_dma_ring_ib_execute,
+ .emit_fence = &evergreen_dma_fence_ring_emit,
+ .emit_semaphore = &r600_dma_semaphore_ring_emit,
+ .cs_parse = NULL,
+ .ring_test = &r600_dma_ring_test,
+ .ib_test = &r600_dma_ib_test,
+ .is_lockup = &cayman_dma_is_lockup,
+ .vm_flush = &si_dma_vm_flush,
}
},
.irq = {
@@ -1747,8 +1767,8 @@
.copy = {
.blit = NULL,
.blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
- .dma = NULL,
- .dma_ring_index = RADEON_RING_TYPE_GFX_INDEX,
+ .dma = &si_copy_dma,
+ .dma_ring_index = R600_RING_TYPE_DMA_INDEX,
.copy = NULL,
.copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
},
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index c2988f7..ae56673 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -501,5 +501,10 @@
void si_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib);
uint64_t si_get_gpu_clock(struct radeon_device *rdev);
+int si_copy_dma(struct radeon_device *rdev,
+ uint64_t src_offset, uint64_t dst_offset,
+ unsigned num_gpu_pages,
+ struct radeon_fence **fence);
+void si_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
#endif
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index c4d9eb6..93f7171 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -1660,6 +1660,8 @@
WREG32(GB_ADDR_CONFIG, gb_addr_config);
WREG32(DMIF_ADDR_CONFIG, gb_addr_config);
WREG32(HDP_ADDR_CONFIG, gb_addr_config);
+ WREG32(DMA_TILING_CONFIG + DMA0_REGISTER_OFFSET, gb_addr_config);
+ WREG32(DMA_TILING_CONFIG + DMA1_REGISTER_OFFSET, gb_addr_config);
si_tiling_mode_table_init(rdev);
@@ -1836,6 +1838,9 @@
radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
WREG32(CP_ME_CNTL, (CP_ME_HALT | CP_PFP_HALT | CP_CE_HALT));
WREG32(SCRATCH_UMSK, 0);
+ rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ready = false;
+ rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX].ready = false;
+ rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX].ready = false;
}
udelay(50);
}
@@ -2891,6 +2896,32 @@
radeon_ring_write(ring, 0x0);
}
+void si_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
+{
+ struct radeon_ring *ring = &rdev->ring[ridx];
+
+ if (vm == NULL)
+ return;
+
+ radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
+ if (vm->id < 8) {
+ radeon_ring_write(ring, (0xf << 16) | ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2));
+ } else {
+ radeon_ring_write(ring, (0xf << 16) | ((VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm->id - 8) << 2)) >> 2));
+ }
+ radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
+
+ /* flush hdp cache */
+ radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
+ radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
+ radeon_ring_write(ring, 1);
+
+ /* bits 0-7 are the VM contexts0-7 */
+ radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
+ radeon_ring_write(ring, (0xf << 16) | (VM_INVALIDATE_REQUEST >> 2));
+ radeon_ring_write(ring, 1 << vm->id);
+}
+
/*
* RLC
*/
@@ -3059,6 +3090,10 @@
WREG32(CP_INT_CNTL_RING0, CNTX_BUSY_INT_ENABLE | CNTX_EMPTY_INT_ENABLE);
WREG32(CP_INT_CNTL_RING1, 0);
WREG32(CP_INT_CNTL_RING2, 0);
+ tmp = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET) & ~TRAP_ENABLE;
+ WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, tmp);
+ tmp = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET) & ~TRAP_ENABLE;
+ WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, tmp);
WREG32(GRBM_INT_CNTL, 0);
WREG32(INT_MASK + EVERGREEN_CRTC0_REGISTER_OFFSET, 0);
WREG32(INT_MASK + EVERGREEN_CRTC1_REGISTER_OFFSET, 0);
@@ -3178,6 +3213,7 @@
u32 hpd1, hpd2, hpd3, hpd4, hpd5, hpd6;
u32 grbm_int_cntl = 0;
u32 grph1 = 0, grph2 = 0, grph3 = 0, grph4 = 0, grph5 = 0, grph6 = 0;
+ u32 dma_cntl, dma_cntl1;
if (!rdev->irq.installed) {
WARN(1, "Can't enable IRQ/MSI because no handler is installed\n");
@@ -3198,6 +3234,9 @@
hpd5 = RREG32(DC_HPD5_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~DC_HPDx_INT_EN;
+ dma_cntl = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET) & ~TRAP_ENABLE;
+ dma_cntl1 = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET) & ~TRAP_ENABLE;
+
/* enable CP interrupts on all rings */
if (atomic_read(&rdev->irq.ring_int[RADEON_RING_TYPE_GFX_INDEX])) {
DRM_DEBUG("si_irq_set: sw int gfx\n");
@@ -3211,6 +3250,15 @@
DRM_DEBUG("si_irq_set: sw int cp2\n");
cp_int_cntl2 |= TIME_STAMP_INT_ENABLE;
}
+ if (atomic_read(&rdev->irq.ring_int[R600_RING_TYPE_DMA_INDEX])) {
+ DRM_DEBUG("si_irq_set: sw int dma\n");
+ dma_cntl |= TRAP_ENABLE;
+ }
+
+ if (atomic_read(&rdev->irq.ring_int[CAYMAN_RING_TYPE_DMA1_INDEX])) {
+ DRM_DEBUG("si_irq_set: sw int dma1\n");
+ dma_cntl1 |= TRAP_ENABLE;
+ }
if (rdev->irq.crtc_vblank_int[0] ||
atomic_read(&rdev->irq.pflip[0])) {
DRM_DEBUG("si_irq_set: vblank 0\n");
@@ -3270,6 +3318,9 @@
WREG32(CP_INT_CNTL_RING1, cp_int_cntl1);
WREG32(CP_INT_CNTL_RING2, cp_int_cntl2);
+ WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, dma_cntl);
+ WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, dma_cntl1);
+
WREG32(GRBM_INT_CNTL, grbm_int_cntl);
WREG32(INT_MASK + EVERGREEN_CRTC0_REGISTER_OFFSET, crtc1);
@@ -3728,9 +3779,17 @@
break;
}
break;
+ case 224: /* DMA trap event */
+ DRM_DEBUG("IH: DMA trap\n");
+ radeon_fence_process(rdev, R600_RING_TYPE_DMA_INDEX);
+ break;
case 233: /* GUI IDLE */
DRM_DEBUG("IH: GUI idle\n");
break;
+ case 244: /* DMA trap event */
+ DRM_DEBUG("IH: DMA1 trap\n");
+ radeon_fence_process(rdev, CAYMAN_RING_TYPE_DMA1_INDEX);
+ break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
@@ -3754,6 +3813,80 @@
return IRQ_HANDLED;
}
+/**
+ * si_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 (SI).
+ * Used by the radeon ttm implementation to move pages if
+ * registered as the asic copy callback.
+ */
+int si_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_bytes, cur_size_in_bytes;
+ 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_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
+ num_loops = DIV_ROUND_UP(size_in_bytes, 0xfffff);
+ r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11);
+ 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_bytes = size_in_bytes;
+ if (cur_size_in_bytes > 0xFFFFF)
+ cur_size_in_bytes = 0xFFFFF;
+ size_in_bytes -= cur_size_in_bytes;
+ radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 1, 0, 0, cur_size_in_bytes));
+ radeon_ring_write(ring, dst_offset & 0xffffffff);
+ radeon_ring_write(ring, src_offset & 0xffffffff);
+ radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
+ radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
+ src_offset += cur_size_in_bytes;
+ dst_offset += cur_size_in_bytes;
+ }
+
+ 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;
+}
+
/*
* startup/shutdown callbacks
*/
@@ -3825,6 +3958,18 @@
return r;
}
+ r = radeon_fence_driver_start_ring(rdev, R600_RING_TYPE_DMA_INDEX);
+ if (r) {
+ dev_err(rdev->dev, "failed initializing DMA fences (%d).\n", r);
+ return r;
+ }
+
+ r = radeon_fence_driver_start_ring(rdev, CAYMAN_RING_TYPE_DMA1_INDEX);
+ if (r) {
+ dev_err(rdev->dev, "failed initializing DMA fences (%d).\n", r);
+ return r;
+ }
+
/* Enable IRQ */
r = si_irq_init(rdev);
if (r) {
@@ -3855,6 +4000,22 @@
if (r)
return r;
+ ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
+ r = radeon_ring_init(rdev, ring, ring->ring_size, R600_WB_DMA_RPTR_OFFSET,
+ DMA_RB_RPTR + DMA0_REGISTER_OFFSET,
+ DMA_RB_WPTR + DMA0_REGISTER_OFFSET,
+ 2, 0x3fffc, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0));
+ if (r)
+ return r;
+
+ ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
+ r = radeon_ring_init(rdev, ring, ring->ring_size, CAYMAN_WB_DMA1_RPTR_OFFSET,
+ DMA_RB_RPTR + DMA1_REGISTER_OFFSET,
+ DMA_RB_WPTR + DMA1_REGISTER_OFFSET,
+ 2, 0x3fffc, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0));
+ if (r)
+ return r;
+
r = si_cp_load_microcode(rdev);
if (r)
return r;
@@ -3862,6 +4023,10 @@
if (r)
return r;
+ r = cayman_dma_resume(rdev);
+ if (r)
+ return r;
+
r = radeon_ib_pool_init(rdev);
if (r) {
dev_err(rdev->dev, "IB initialization failed (%d).\n", r);
@@ -3903,9 +4068,7 @@
int si_suspend(struct radeon_device *rdev)
{
si_cp_enable(rdev, false);
- rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ready = false;
- rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX].ready = false;
- rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX].ready = false;
+ cayman_dma_stop(rdev);
si_irq_suspend(rdev);
radeon_wb_disable(rdev);
si_pcie_gart_disable(rdev);
@@ -3983,6 +4146,14 @@
ring->ring_obj = NULL;
r600_ring_init(rdev, ring, 1024 * 1024);
+ ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
+ ring->ring_obj = NULL;
+ r600_ring_init(rdev, ring, 64 * 1024);
+
+ ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
+ ring->ring_obj = NULL;
+ r600_ring_init(rdev, ring, 64 * 1024);
+
rdev->ih.ring_obj = NULL;
r600_ih_ring_init(rdev, 64 * 1024);
@@ -3995,6 +4166,7 @@
if (r) {
dev_err(rdev->dev, "disabling GPU acceleration\n");
si_cp_fini(rdev);
+ cayman_dma_fini(rdev);
si_irq_fini(rdev);
si_rlc_fini(rdev);
radeon_wb_fini(rdev);
@@ -4023,6 +4195,7 @@
r600_blit_fini(rdev);
#endif
si_cp_fini(rdev);
+ cayman_dma_fini(rdev);
si_irq_fini(rdev);
si_rlc_fini(rdev);
radeon_wb_fini(rdev);
diff --git a/drivers/gpu/drm/radeon/sid.h b/drivers/gpu/drm/radeon/sid.h
index 53b4d45..0acd327 100644
--- a/drivers/gpu/drm/radeon/sid.h
+++ b/drivers/gpu/drm/radeon/sid.h
@@ -936,4 +936,51 @@
#define PACKET3_WAIT_ON_AVAIL_BUFFER 0x8A
#define PACKET3_SWITCH_BUFFER 0x8B
+/* ASYNC DMA - first instance at 0xd000, second at 0xd800 */
+#define DMA0_REGISTER_OFFSET 0x0 /* not a register */
+#define DMA1_REGISTER_OFFSET 0x800 /* not a register */
+
+#define DMA_RB_CNTL 0xd000
+# define DMA_RB_ENABLE (1 << 0)
+# define DMA_RB_SIZE(x) ((x) << 1) /* log2 */
+# define DMA_RB_SWAP_ENABLE (1 << 9) /* 8IN32 */
+# define DMA_RPTR_WRITEBACK_ENABLE (1 << 12)
+# define DMA_RPTR_WRITEBACK_SWAP_ENABLE (1 << 13) /* 8IN32 */
+# define DMA_RPTR_WRITEBACK_TIMER(x) ((x) << 16) /* log2 */
+#define DMA_RB_BASE 0xd004
+#define DMA_RB_RPTR 0xd008
+#define DMA_RB_WPTR 0xd00c
+
+#define DMA_RB_RPTR_ADDR_HI 0xd01c
+#define DMA_RB_RPTR_ADDR_LO 0xd020
+
+#define DMA_IB_CNTL 0xd024
+# define DMA_IB_ENABLE (1 << 0)
+# define DMA_IB_SWAP_ENABLE (1 << 4)
+#define DMA_IB_RPTR 0xd028
+#define DMA_CNTL 0xd02c
+# define TRAP_ENABLE (1 << 0)
+# define SEM_INCOMPLETE_INT_ENABLE (1 << 1)
+# define SEM_WAIT_INT_ENABLE (1 << 2)
+# define DATA_SWAP_ENABLE (1 << 3)
+# define FENCE_SWAP_ENABLE (1 << 4)
+# define CTXEMPTY_INT_ENABLE (1 << 28)
+#define DMA_TILING_CONFIG 0xd0b8
+
+#define DMA_PACKET(cmd, b, t, s, n) ((((cmd) & 0xF) << 28) | \
+ (((b) & 0x1) << 26) | \
+ (((t) & 0x1) << 23) | \
+ (((s) & 0x1) << 22) | \
+ (((n) & 0xFFFFF) << 0))
+/* async DMA Packet types */
+#define DMA_PACKET_WRITE 0x2
+#define DMA_PACKET_COPY 0x3
+#define DMA_PACKET_INDIRECT_BUFFER 0x4
+#define DMA_PACKET_SEMAPHORE 0x5
+#define DMA_PACKET_FENCE 0x6
+#define DMA_PACKET_TRAP 0x7
+#define DMA_PACKET_SRBM_WRITE 0x9
+#define DMA_PACKET_CONSTANT_FILL 0xd
+#define DMA_PACKET_NOP 0xf
+
#endif