diff options
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_buffer.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_buffer.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c index ed9588f36bc9..9e7098e3207f 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c @@ -250,6 +250,42 @@ void etnaviv_buffer_end(struct etnaviv_gpu *gpu) } } +/* Append a 'sync point' to the ring buffer. */ +void etnaviv_sync_point_queue(struct etnaviv_gpu *gpu, unsigned int event) +{ + struct etnaviv_cmdbuf *buffer = gpu->buffer; + unsigned int waitlink_offset = buffer->user_size - 16; + u32 dwords, target; + + /* + * We need at most 3 dwords in the return target: + * 1 event + 1 end + 1 wait + 1 link. + */ + dwords = 4; + target = etnaviv_buffer_reserve(gpu, buffer, dwords); + + /* Signal sync point event */ + CMD_LOAD_STATE(buffer, VIVS_GL_EVENT, VIVS_GL_EVENT_EVENT_ID(event) | + VIVS_GL_EVENT_FROM_PE); + + /* Stop the FE to 'pause' the GPU */ + CMD_END(buffer); + + /* Append waitlink */ + CMD_WAIT(buffer); + CMD_LINK(buffer, 2, etnaviv_cmdbuf_get_va(buffer) + + buffer->user_size - 4); + + /* + * Kick off the 'sync point' command by replacing the previous + * WAIT with a link to the address in the ring buffer. + */ + etnaviv_buffer_replace_wait(buffer, waitlink_offset, + VIV_FE_LINK_HEADER_OP_LINK | + VIV_FE_LINK_HEADER_PREFETCH(dwords), + target); +} + /* Append a command buffer to the ring buffer. */ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event, struct etnaviv_cmdbuf *cmdbuf) |