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drm/radeon: implement common cs packet parse function

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CS packet parse functions have a lot of in common across
all ASICs. Implement a common function and take care of
small differences between families inside the function.

This patch is a prep for major refactoring and consolidation
of CS parsing code.

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Reviewed-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ilija Hadzic 2013-01-02 18:27:40 -05:00 committed by Alex Deucher
parent 66b3543ef3
commit 4db013110c
2 changed files with 64 additions and 0 deletions
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53
drivers/gpu/drm/radeon/radeon_cs.c
View File

@ -642,3 +642,56 @@ u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
idx_value = ibc->kpage[new_page][pg_offset/4];
return idx_value;
}
/**
* radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
* @parser: parser structure holding parsing context.
* @pkt: where to store packet information
*
* Assume that chunk_ib_index is properly set. Will return -EINVAL
* if packet is bigger than remaining ib size. or if packets is unknown.
**/
int radeon_cs_packet_parse(struct radeon_cs_parser *p,
struct radeon_cs_packet *pkt,
unsigned idx)
{
struct radeon_cs_chunk *ib_chunk = &p->chunks[p->chunk_ib_idx];
struct radeon_device *rdev = p->rdev;
uint32_t header;
if (idx >= ib_chunk->length_dw) {
DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
idx, ib_chunk->length_dw);
return -EINVAL;
}
header = radeon_get_ib_value(p, idx);
pkt->idx = idx;
pkt->type = RADEON_CP_PACKET_GET_TYPE(header);
pkt->count = RADEON_CP_PACKET_GET_COUNT(header);
pkt->one_reg_wr = 0;
switch (pkt->type) {
case RADEON_PACKET_TYPE0:
if (rdev->family < CHIP_R600) {
pkt->reg = R100_CP_PACKET0_GET_REG(header);
pkt->one_reg_wr =
RADEON_CP_PACKET0_GET_ONE_REG_WR(header);
} else
pkt->reg = R600_CP_PACKET0_GET_REG(header);
break;
case RADEON_PACKET_TYPE3:
pkt->opcode = RADEON_CP_PACKET3_GET_OPCODE(header);
break;
case RADEON_PACKET_TYPE2:
pkt->count = -1;
break;
default:
DRM_ERROR("Unknown packet type %d at %d !\n", pkt->type, idx);
return -EINVAL;
}
if ((pkt->count + 1 + pkt->idx) >= ib_chunk->length_dw) {
DRM_ERROR("Packet (%d:%d:%d) end after CS buffer (%d) !\n",
pkt->idx, pkt->type, pkt->count, ib_chunk->length_dw);
return -EINVAL;
}
return 0;
}

11
drivers/gpu/drm/radeon/radeon_reg.h
View File

@ -3706,4 +3706,15 @@
#define RV530_GB_PIPE_SELECT2 0x4124
#define RADEON_CP_PACKET_GET_TYPE(h) (((h) >> 30) & 3)
#define RADEON_CP_PACKET_GET_COUNT(h) (((h) >> 16) & 0x3FFF)
#define RADEON_CP_PACKET0_GET_ONE_REG_WR(h) (((h) >> 15) & 1)
#define RADEON_CP_PACKET3_GET_OPCODE(h) (((h) >> 8) & 0xFF)
#define R100_CP_PACKET0_GET_REG(h) (((h) & 0x1FFF) << 2)
#define R600_CP_PACKET0_GET_REG(h) (((h) & 0xFFFF) << 2)
#define RADEON_PACKET_TYPE0 0
#define RADEON_PACKET_TYPE1 1
#define RADEON_PACKET_TYPE2 2
#define RADEON_PACKET_TYPE3 3
#endif