[PATCH] drm/radeon: optimize CIK VM handling v2

[Michel Dänzer]

On 28.05.2014 03:10, Christian König wrote:
> From: Christian König <christian.koenig at amd.com>
> 
> Fill VM page tables from the GART page table if applicable.
> 
> v2: fix copy&paste error
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>  drivers/gpu/drm/radeon/cik_sdma.c | 21 ++++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c
> index f7e46cf..3c2407b 100644
> --- a/drivers/gpu/drm/radeon/cik_sdma.c
> +++ b/drivers/gpu/drm/radeon/cik_sdma.c
> @@ -741,7 +741,26 @@ void cik_sdma_vm_set_page(struct radeon_device *rdev,
>  
>  	trace_radeon_vm_set_page(pe, addr, count, incr, flags);
>  
> -	if (flags & R600_PTE_SYSTEM) {
> +	if (flags == R600_PTE_GART) {
> +		uint64_t src = rdev->gart.table_addr + (addr >> 12) * 8;
> +		while (count) {
> +			unsigned bytes = count * 8;
> +			if (bytes > 0x1FFFF8)
> +				bytes = 0x1FFFF8;
> +
> +			ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_COPY, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
> +			ib->ptr[ib->length_dw++] = bytes;
> +			ib->ptr[ib->length_dw++] = 0; /* src/dst endian swap */
> +			ib->ptr[ib->length_dw++] = src & 0xffffffff;
> +			ib->ptr[ib->length_dw++] = upper_32_bits(src);
> +			ib->ptr[ib->length_dw++] = pe & 0xffffffff;

Masking with 0xffffffff is superfluous here.


-- 
Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer