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v3d: Emit the VCM_CACHE_SIZE packet.

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This is needed to ensure that we don't get blocked waiting for VPM space
with bin/render overlapping.

Cc: "18.2" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Eric Anholt
2018-08-02 12:23:02 -07:00
parent 5d49076990
commit 1561e4984e
6 changed files with 45 additions and 4 deletions
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20
src/broadcom/compiler/vir.c
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@@ -756,10 +756,28 @@ uint64_t *v3d_compile_vs(const struct v3d_compiler *compiler,
if (prog_data->uses_iid)
prog_data->vpm_input_size++;
/* Input/output segment size are in 8x32-bit multiples. */
/* Input/output segment size are in sectors (8 rows of 32 bits per
* channel).
*/
prog_data->vpm_input_size = align(prog_data->vpm_input_size, 8) / 8;
prog_data->vpm_output_size = align(c->num_vpm_writes, 8) / 8;
/* Compute VCM cache size. We set up our program to take up less than
* half of the VPM, so that any set of bin and render programs won't
* run out of space. We need space for at least one input segment,
* and then allocate the rest to output segments (one for the current
* program, the rest to VCM). The valid range of the VCM cache size
* field is 1-4 16-vertex batches, but GFXH-1744 limits us to 2-4
* batches.
*/
assert(c->devinfo->vpm_size);
int sector_size = 16 * sizeof(uint32_t) * 8;
int vpm_size_in_sectors = c->devinfo->vpm_size / sector_size;
int half_vpm = vpm_size_in_sectors / 2;
int vpm_output_batches = half_vpm - prog_data->vpm_input_size;
assert(vpm_output_batches >= 2);
prog_data->vcm_cache_size = CLAMP(vpm_output_batches - 1, 2, 4);
return v3d_return_qpu_insts(c, final_assembly_size);
}