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drm/radeon: re-enable PTE/PDE packet for set_page on cayman/TN

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PTE/PDE doesn't support a single update (count = 1).  We had
previously disabled it since it we were hitting that case which
let to hangs.  The PTE/PDE packet is much more efficient for VM
updates where it can be used.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-04-16 10:42:15 -04:00
parent 0cd9cb76ae
commit 2ab91adae7
2 changed files with 53 additions and 19 deletions
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67
drivers/gpu/drm/radeon/ni.c
View File

@ -2079,28 +2079,57 @@ void cayman_vm_set_page(struct radeon_device *rdev,
}
}
} else {
while (count) {
ndw = count * 2;
if (ndw > 0xFFFFE)
ndw = 0xFFFFE;
if ((flags & RADEON_VM_PAGE_SYSTEM) ||
(count == 1)) {
while (count) {
ndw = count * 2;
if (ndw > 0xFFFFE)
ndw = 0xFFFFE;
/* for non-physically contiguous pages (system) */
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);
value &= 0xFFFFFFFFFFFFF000ULL;
} else if (flags & RADEON_VM_PAGE_VALID) {
value = addr;
} else {
value = 0;
/* for non-physically contiguous pages (system) */
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);
value &= 0xFFFFFFFFFFFFF000ULL;
} else if (flags & RADEON_VM_PAGE_VALID) {
value = addr;
} else {
value = 0;
}
addr += incr;
value |= r600_flags;
ib->ptr[ib->length_dw++] = value;
ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
addr += incr;
value |= r600_flags;
ib->ptr[ib->length_dw++] = value;
}
while (ib->length_dw & 0x7)
ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0);
} else {
while (count) {
ndw = count * 2;
if (ndw > 0xFFFFE)
ndw = 0xFFFFE;
if (flags & RADEON_VM_PAGE_VALID)
value = addr;
else
value = 0;
/* for physically contiguous pages (vram) */
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)

5
drivers/gpu/drm/radeon/nid.h
View File

@ -684,6 +684,11 @@
(((vmid) & 0xF) << 20) | \
(((n) & 0xFFFFF) << 0))
#define DMA_PTE_PDE_PACKET(n) ((2 << 28) | \
(1 << 26) | \
(1 << 21) | \
(((n) & 0xFFFFF) << 0))
/* async DMA Packet types */
#define DMA_PACKET_WRITE 0x2
#define DMA_PACKET_COPY 0x3