From: Alex Deucher <alexander.deucher@xxxxxxx>
For very large page table updates, we can exceed the
size of the ring. To avoid this, use an IB to perform
the page table update.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
We may want to do something similar for the BO move code as we
could potentially run out of ring space on a small ring like the
DMA rings if we are moving very large buffers.
Alex
drivers/gpu/drm/radeon/ni.c | 30 +++++++++++--------
drivers/gpu/drm/radeon/radeon.h | 6 ++-
drivers/gpu/drm/radeon/radeon_asic.h | 8 ++++-
drivers/gpu/drm/radeon/radeon_gart.c | 45 +++++++++++++++++++++++------
drivers/gpu/drm/radeon/si.c | 52 ++++++++++++++++++---------------
5 files changed, 90 insertions(+), 51 deletions(-)
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 170bd03..7cead76 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1946,19 +1946,21 @@ uint32_t cayman_vm_page_flags(struct radeon_device *rdev, uint32_t flags)
* cayman_vm_set_page - update the page tables using the CP
*
* @rdev: radeon_device pointer
+ * @ib: indirect buffer to fill with commands
* @pe: addr of the page entry
* @addr: dst addr to write into pe
* @count: number of page entries to update
* @incr: increase next addr by incr bytes
* @flags: access flags
*
- * Update the page tables using the CP (cayman-si).
+ * Update the page tables using the CP (cayman/TN).
*/
-void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
+void cayman_vm_set_page(struct radeon_device *rdev,
+ struct radeon_ib *ib,
+ uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags)
{
- struct radeon_ring *ring = &rdev->ring[rdev->asic->vm.pt_ring_index];
uint32_t r600_flags = cayman_vm_page_flags(rdev, flags);
uint64_t value;
unsigned ndw;
@@ -1969,9 +1971,9 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
if (ndw > 0x3FFF)
ndw = 0x3FFF;
- radeon_ring_write(ring, PACKET3(PACKET3_ME_WRITE, ndw));
- radeon_ring_write(ring, pe);
- radeon_ring_write(ring, upper_32_bits(pe) & 0xff);
+ ib->ptr[ib->length_dw++] = PACKET3(PACKET3_ME_WRITE, ndw);
+ ib->ptr[ib->length_dw++] = pe;
+ ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
for (; ndw > 1; ndw -= 2, --count, pe += 8) {
if (flags & RADEON_VM_PAGE_SYSTEM) {
value = radeon_vm_map_gart(rdev, addr);
@@ -1983,8 +1985,8 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
}
addr += incr;
value |= r600_flags;
- radeon_ring_write(ring, value);
- radeon_ring_write(ring, upper_32_bits(value));
+ ib->ptr[ib->length_dw++] = value;
+ ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
}
} else {
@@ -1994,9 +1996,9 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
ndw = 0xFFFFE;
/* for non-physically contiguous pages (system) */
- radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, ndw));
- radeon_ring_write(ring, pe);
- radeon_ring_write(ring, upper_32_bits(pe) & 0xff);
+ ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, ndw);
+ ib->ptr[ib->length_dw++] = pe;
+ ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
for (; ndw > 0; ndw -= 2, --count, pe += 8) {
if (flags & RADEON_VM_PAGE_SYSTEM) {
value = radeon_vm_map_gart(rdev, addr);
@@ -2008,10 +2010,12 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
}
addr += incr;
value |= r600_flags;
- radeon_ring_write(ring, value);
- radeon_ring_write(ring, upper_32_bits(value));
+ ib->ptr[ib->length_dw++] = value;
+ ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
}
+ while (ib->length_dw & 0x7)
+ ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0);
}
}
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 6539d6c..89b9645 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1188,7 +1188,9 @@ struct radeon_asic {
void (*fini)(struct radeon_device *rdev);
u32 pt_ring_index;
- void (*set_page)(struct radeon_device *rdev, uint64_t pe,
+ void (*set_page)(struct radeon_device *rdev,
+ struct radeon_ib *ib,
+ uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags);
} vm;
@@ -1810,7 +1812,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
#define radeon_gart_set_page(rdev, i, p) (rdev)->asic->gart.set_page((rdev), (i), (p))
#define radeon_asic_vm_init(rdev) (rdev)->asic->vm.init((rdev))
#define radeon_asic_vm_fini(rdev) (rdev)->asic->vm.fini((rdev))
-#define radeon_asic_vm_set_page(rdev, pe, addr, count, incr, flags) ((rdev)->asic->vm.set_page((rdev), (pe), (addr), (count), (incr), (flags)))
+#define radeon_asic_vm_set_page(rdev, ib, pe, addr, count, incr, flags) ((rdev)->asic->vm.set_page((rdev), (ib), (pe), (addr), (count), (incr), (flags)))
#define radeon_ring_start(rdev, r, cp) (rdev)->asic->ring[(r)].ring_start((rdev), (cp))
#define radeon_ring_test(rdev, r, cp) (rdev)->asic->ring[(r)].ring_test((rdev), (cp))
#define radeon_ib_test(rdev, r, cp) (rdev)->asic->ring[(r)].ib_test((rdev), (cp))
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index e429e25..f4134a8 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -474,7 +474,9 @@ int cayman_vm_init(struct radeon_device *rdev);
void cayman_vm_fini(struct radeon_device *rdev);
void cayman_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
uint32_t cayman_vm_page_flags(struct radeon_device *rdev, uint32_t flags);
-void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
+void cayman_vm_set_page(struct radeon_device *rdev,
+ struct radeon_ib *ib,
+ uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags);
int evergreen_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib);
@@ -506,7 +508,9 @@ int si_irq_set(struct radeon_device *rdev);
int si_irq_process(struct radeon_device *rdev);
int si_vm_init(struct radeon_device *rdev);
void si_vm_fini(struct radeon_device *rdev);
-void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
+void si_vm_set_page(struct radeon_device *rdev,
+ struct radeon_ib *ib,
+ uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags);
void si_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index 6e24f84..d95c61d 100644
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -929,6 +929,7 @@ uint64_t radeon_vm_map_gart(struct radeon_device *rdev, uint64_t addr)
*/
static int radeon_vm_update_pdes(struct radeon_device *rdev,
struct radeon_vm *vm,
+ struct radeon_ib *ib,
uint64_t start, uint64_t end)
{
static const uint32_t incr = RADEON_VM_PTE_COUNT * 8;
@@ -971,7 +972,7 @@ retry:
((last_pt + incr * count) != pt)) {
if (count) {
- radeon_asic_vm_set_page(rdev, last_pde,
+ radeon_asic_vm_set_page(rdev, ib, last_pde,
last_pt, count, incr,
RADEON_VM_PAGE_VALID);
}
@@ -985,7 +986,7 @@ retry:
}
if (count) {
- radeon_asic_vm_set_page(rdev, last_pde, last_pt, count,
+ radeon_asic_vm_set_page(rdev, ib, last_pde, last_pt, count,
incr, RADEON_VM_PAGE_VALID);
}
@@ -1009,6 +1010,7 @@ retry:
*/
static void radeon_vm_update_ptes(struct radeon_device *rdev,
struct radeon_vm *vm,
+ struct radeon_ib *ib,
uint64_t start, uint64_t end,
uint64_t dst, uint32_t flags)
{
@@ -1038,7 +1040,7 @@ static void radeon_vm_update_ptes(struct radeon_device *rdev,
if ((last_pte + 8 * count) != pte) {
if (count) {
- radeon_asic_vm_set_page(rdev, last_pte,
+ radeon_asic_vm_set_page(rdev, ib, last_pte,
last_dst, count,
RADEON_GPU_PAGE_SIZE,
flags);
@@ -1056,7 +1058,8 @@ static void radeon_vm_update_ptes(struct radeon_device *rdev,
}
if (count) {
- radeon_asic_vm_set_page(rdev, last_pte, last_dst, count,
+ radeon_asic_vm_set_page(rdev, ib, last_pte,
+ last_dst, count,
RADEON_GPU_PAGE_SIZE, flags);
}
}
@@ -1082,6 +1085,7 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
unsigned ridx = rdev->asic->vm.pt_ring_index;
struct radeon_ring *ring = &rdev->ring[ridx];
struct radeon_semaphore *sem = NULL;
+ struct radeon_ib ib;
struct radeon_bo_va *bo_va;
unsigned nptes, npdes, ndw;
uint64_t addr;
@@ -1140,9 +1144,8 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
/* assume two extra pdes in case the mapping overlaps the borders */
npdes = (nptes >> RADEON_VM_BLOCK_SIZE) + 2;
- /* estimate number of dw needed */
- /* semaphore, fence and padding */
- ndw = 32;
+ /* padding, etc. */
+ ndw = 64;
if (RADEON_VM_BLOCK_SIZE > 11)
/* reserve space for one header for every 2k dwords */
@@ -1161,8 +1164,25 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
/* reserve space for pde addresses */
ndw += npdes * 2;
- r = radeon_ring_lock(rdev, ring, ndw);
+ /* update too big for an IB */
+ if (ndw > 0xfffff)
+ return -ENOMEM;
+
+ r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib.sa_bo, ndw * 4, 256, true);
+ if (r) {
+ return r;
+ }
+ ib.ring = ridx;
+ ib.fence = NULL;
+ ib.ptr = radeon_sa_bo_cpu_addr(ib.sa_bo);
+ ib.vm = NULL;
+ ib.gpu_addr = radeon_sa_bo_gpu_addr(ib.sa_bo);
+ ib.is_const_ib = false;
+ ib.length_dw = 0;
+
+ r = radeon_ring_lock(rdev, ring, 64);
if (r) {
+ radeon_sa_bo_free(rdev, &ib.sa_bo, NULL);
return r;
}
@@ -1171,23 +1191,28 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
radeon_fence_note_sync(vm->fence, ridx);
}
- r = radeon_vm_update_pdes(rdev, vm, bo_va->soffset, bo_va->eoffset);
+ r = radeon_vm_update_pdes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset);
if (r) {
+ radeon_sa_bo_free(rdev, &ib.sa_bo, NULL);
radeon_ring_unlock_undo(rdev, ring);
return r;
}
- radeon_vm_update_ptes(rdev, vm, bo_va->soffset, bo_va->eoffset,
+ radeon_vm_update_ptes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset,
addr, bo_va->flags);
+ radeon_ring_ib_execute(rdev, ib.ring, &ib);
+
radeon_fence_unref(&vm->fence);
r = radeon_fence_emit(rdev, &vm->fence, ridx);
if (r) {
+ radeon_sa_bo_free(rdev, &ib.sa_bo, NULL);
radeon_ring_unlock_undo(rdev, ring);
return r;
}
radeon_ring_unlock_commit(rdev, ring);
radeon_semaphore_free(rdev, &sem, vm->fence);
+ radeon_sa_bo_free(rdev, &ib.sa_bo, vm->fence);
radeon_fence_unref(&vm->last_flush);
return 0;
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index cd83bc5..a910cb9 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -3043,19 +3043,21 @@ void si_vm_fini(struct radeon_device *rdev)
* si_vm_set_page - update the page tables using the CP
*
* @rdev: radeon_device pointer
+ * @ib: indirect buffer to fill with commands
* @pe: addr of the page entry
* @addr: dst addr to write into pe
* @count: number of page entries to update
* @incr: increase next addr by incr bytes
* @flags: access flags
*
- * Update the page tables using the CP (cayman-si).
+ * Update the page tables using the CP (SI).
*/
-void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
+void si_vm_set_page(struct radeon_device *rdev,
+ struct radeon_ib *ib,
+ uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags)
{
- struct radeon_ring *ring = &rdev->ring[rdev->asic->vm.pt_ring_index];
uint32_t r600_flags = cayman_vm_page_flags(rdev, flags);
uint64_t value;
unsigned ndw;
@@ -3066,11 +3068,11 @@ void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
if (ndw > 0x3FFE)
ndw = 0x3FFE;
- radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, ndw));
- radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
- WRITE_DATA_DST_SEL(1)));
- radeon_ring_write(ring, pe);
- radeon_ring_write(ring, upper_32_bits(pe));
+ ib->ptr[ib->length_dw++] = PACKET3(PACKET3_WRITE_DATA, ndw);
+ ib->ptr[ib->length_dw++] = (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(1));
+ ib->ptr[ib->length_dw++] = pe;
+ ib->ptr[ib->length_dw++] = upper_32_bits(pe);
for (; ndw > 2; ndw -= 2, --count, pe += 8) {
if (flags & RADEON_VM_PAGE_SYSTEM) {
value = radeon_vm_map_gart(rdev, addr);
@@ -3082,8 +3084,8 @@ void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
}
addr += incr;
value |= r600_flags;
- radeon_ring_write(ring, value);
- radeon_ring_write(ring, upper_32_bits(value));
+ ib->ptr[ib->length_dw++] = value;
+ ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
}
} else {
@@ -3095,9 +3097,9 @@ void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
ndw = 0xFFFFE;
/* for non-physically contiguous pages (system) */
- radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, ndw));
- radeon_ring_write(ring, pe);
- radeon_ring_write(ring, upper_32_bits(pe) & 0xff);
+ ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, ndw);
+ ib->ptr[ib->length_dw++] = pe;
+ ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
for (; ndw > 0; ndw -= 2, --count, pe += 8) {
if (flags & RADEON_VM_PAGE_SYSTEM) {
value = radeon_vm_map_gart(rdev, addr);
@@ -3109,8 +3111,8 @@ void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
}
addr += incr;
value |= r600_flags;
- radeon_ring_write(ring, value);
- radeon_ring_write(ring, upper_32_bits(value));
+ ib->ptr[ib->length_dw++] = value;
+ ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
}
} else {
@@ -3124,20 +3126,22 @@ void si_vm_set_page(struct radeon_device *rdev, uint64_t pe,
else
value = 0;
/* for physically contiguous pages (vram) */
- radeon_ring_write(ring, DMA_PTE_PDE_PACKET(ndw));
- radeon_ring_write(ring, pe); /* dst addr */
- radeon_ring_write(ring, upper_32_bits(pe) & 0xff);
- radeon_ring_write(ring, r600_flags); /* mask */
- radeon_ring_write(ring, 0);
- radeon_ring_write(ring, value); /* value */
- radeon_ring_write(ring, upper_32_bits(value));
- radeon_ring_write(ring, incr); /* increment size */
- radeon_ring_write(ring, 0);
+ ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
+ ib->ptr[ib->length_dw++] = pe; /* dst addr */
+ ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
+ ib->ptr[ib->length_dw++] = r600_flags; /* mask */
+ ib->ptr[ib->length_dw++] = 0;
+ ib->ptr[ib->length_dw++] = value; /* value */
+ ib->ptr[ib->length_dw++] = upper_32_bits(value);
+ ib->ptr[ib->length_dw++] = incr; /* increment size */
+ ib->ptr[ib->length_dw++] = 0;
pe += ndw * 4;
addr += (ndw / 2) * incr;
count -= ndw / 2;
}
}
+ while (ib->length_dw & 0x7)
+ ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0);
}
}
