From 4db013110cd3da05e4cf7e1119468817709cb9db Mon Sep 17 00:00:00 2001 From: Ilija Hadzic Date: Wed, 2 Jan 2013 18:27:40 -0500 Subject: drm/radeon: implement common cs packet parse function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Marek Olšák Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon_cs.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) (limited to 'drivers/gpu/drm/radeon/radeon_cs.c') diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index 0a23589e3d40..7355a3613e23 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -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; +} -- cgit v1.2.2