next_reloc function does the same thing in all ASICs with
the exception of R600 which has a special case in legacy mode.
Pull out the common function in preparation for refactoring.
Signed-off-by: Ilija Hadzic <ihadzic at research.bell-labs.com>
---
drivers/gpu/drm/radeon/radeon.h | 3 +++
drivers/gpu/drm/radeon/radeon_cs.c | 54 ++++++++++++++++++++++++++++++++++++++
2 files changed, 57 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a0e28dc..dd8feab 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1972,6 +1972,9 @@ int radeon_cs_packet_parse(struct radeon_cs_parser *p,
bool radeon_cs_packet_next_is_pkt3_nop(struct radeon_cs_parser *p);
void radeon_cs_dump_packet(struct radeon_cs_parser *p,
struct radeon_cs_packet *pkt);
+int radeon_cs_packet_next_reloc(struct radeon_cs_parser *p,
+ struct radeon_cs_reloc **cs_reloc,
+ int nomm);
int r600_cs_common_vline_parse(struct radeon_cs_parser *p,
uint32_t *vline_start_end,
uint32_t *vline_status);
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c
b/drivers/gpu/drm/radeon/radeon_cs.c
index 2ef7e81..5c3d773 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -734,3 +734,57 @@ void radeon_cs_dump_packet(struct radeon_cs_parser *p,
DRM_INFO("ib[%d]=0x%08X\n", idx, ib[idx]);
}
+/**
+ * radeon_cs_packet_next_reloc() - parse next (should be reloc) packet
+ * @parser: parser structure holding parsing context.
+ * @data: pointer to relocation data
+ * @offset_start: starting offset
+ * @offset_mask: offset mask (to align start offset on)
+ * @reloc: reloc informations
+ *
+ * Check if next packet is relocation packet3, do bo validation and compute
+ * GPU offset using the provided start.
+ **/
+int radeon_cs_packet_next_reloc(struct radeon_cs_parser *p,
+ struct radeon_cs_reloc **cs_reloc,
+ int nomm)
+{
+ struct radeon_cs_chunk *relocs_chunk;
+ struct radeon_cs_packet p3reloc;
+ unsigned idx;
+ int r;
+
+ if (p->chunk_relocs_idx == -1) {
+ DRM_ERROR("No relocation chunk !\n");
+ return -EINVAL;
+ }
+ *cs_reloc = NULL;
+ relocs_chunk = &p->chunks[p->chunk_relocs_idx];
+ r = radeon_cs_packet_parse(p, &p3reloc, p->idx);
+ if (r)
+ return r;
+ p->idx += p3reloc.count + 2;
+ if (p3reloc.type != RADEON_PACKET_TYPE3 ||
+ p3reloc.opcode != RADEON_PACKET3_NOP) {
+ DRM_ERROR("No packet3 for relocation for packet at %d.\n",
+ p3reloc.idx);
+ radeon_cs_dump_packet(p, &p3reloc);
+ return -EINVAL;
+ }
+ idx = radeon_get_ib_value(p, p3reloc.idx + 1);
+ if (idx >= relocs_chunk->length_dw) {
+ DRM_ERROR("Relocs at %d after relocations chunk end %d !\n",
+ idx, relocs_chunk->length_dw);
+ radeon_cs_dump_packet(p, &p3reloc);
+ return -EINVAL;
+ }
+ /* FIXME: we assume reloc size is 4 dwords */
+ if (nomm) {
+ *cs_reloc = p->relocs;
+ (*cs_reloc)->lobj.gpu_offset =
+ (u64)relocs_chunk->kdata[idx + 3] << 32;
+ (*cs_reloc)->lobj.gpu_offset |= relocs_chunk->kdata[idx + 0];
+ } else
+ *cs_reloc = p->relocs_ptr[(idx / 4)];
+ return 0;
+}
--
1.7.12
