예제 #1
0
파일: cik_sdma.c 프로젝트: 24hours/linux
/**
 * cik_sdma_vm_set_page - update the page tables using sDMA
 *
 * @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 sDMA (CIK).
 */
void cik_sdma_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)
{
	uint64_t value;
	unsigned ndw;

	trace_radeon_vm_set_page(pe, addr, count, incr, flags);

	if (flags & R600_PTE_SYSTEM) {
		while (count) {
			ndw = count * 2;
			if (ndw > 0xFFFFE)
				ndw = 0xFFFFE;

			/* for non-physically contiguous pages (system) */
			ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
			ib->ptr[ib->length_dw++] = pe;
			ib->ptr[ib->length_dw++] = upper_32_bits(pe);
			ib->ptr[ib->length_dw++] = ndw;
			for (; ndw > 0; ndw -= 2, --count, pe += 8) {
				value = radeon_vm_map_gart(rdev, addr);
				value &= 0xFFFFFFFFFFFFF000ULL;
				addr += incr;
				value |= flags;
				ib->ptr[ib->length_dw++] = value;
				ib->ptr[ib->length_dw++] = upper_32_bits(value);
			}
		}
	} else {
		while (count) {
			ndw = count;
			if (ndw > 0x7FFFF)
				ndw = 0x7FFFF;

			if (flags & R600_PTE_VALID)
				value = addr;
			else
				value = 0;
			/* for physically contiguous pages (vram) */
			ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_GENERATE_PTE_PDE, 0, 0);
			ib->ptr[ib->length_dw++] = pe; /* dst addr */
			ib->ptr[ib->length_dw++] = upper_32_bits(pe);
			ib->ptr[ib->length_dw++] = 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;
			ib->ptr[ib->length_dw++] = ndw; /* number of entries */
			pe += ndw * 8;
			addr += ndw * incr;
			count -= ndw;
		}
	}
	while (ib->length_dw & 0x7)
		ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0);
}
예제 #2
0
/**
 * cik_sdma_vm_write_pages - update PTEs by writing them manually
 *
 * @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 PTEs by writing them manually using sDMA (CIK).
 */
void cik_sdma_vm_write_pages(struct radeon_device *rdev,
			     struct radeon_ib *ib,
			     uint64_t pe,
			     uint64_t addr, unsigned count,
			     uint32_t incr, uint32_t flags)
{
	uint64_t value;
	unsigned ndw;

	while (count) {
		ndw = count * 2;
		if (ndw > 0xFFFFE)
			ndw = 0xFFFFE;

		/* for non-physically contiguous pages (system) */
		ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_WRITE,
			SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
		ib->ptr[ib->length_dw++] = pe;
		ib->ptr[ib->length_dw++] = upper_32_bits(pe);
		ib->ptr[ib->length_dw++] = ndw;
		for (; ndw > 0; ndw -= 2, --count, pe += 8) {
			if (flags & R600_PTE_SYSTEM) {
				value = radeon_vm_map_gart(rdev, addr);
				value &= 0xFFFFFFFFFFFFF000ULL;
			} else if (flags & R600_PTE_VALID) {
				value = addr;
			} else {
				value = 0;
			}
			addr += incr;
			value |= flags;
			ib->ptr[ib->length_dw++] = value;
			ib->ptr[ib->length_dw++] = upper_32_bits(value);
		}
	}
}