2 * Copyright (C) 2019 Collabora, Ltd.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * Authors (Collabora):
24 * Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
29 #include "util/u_math.h"
30 #include "pan_encoder.h"
32 /* Compute shaders are invoked with a gl_NumWorkGroups X/Y/Z triplet. Vertex
33 * shaders, it turns out, are invoked with the same mechanism, with the triplet
34 * (1, vertex_count, instance_count).
36 * Alongside this triplet is the gl_WorkGroupSize X/Y/Z triplet.
38 * Unfortunately, the packing for these triplet into the
39 * mali_vertex_tiler_prefix is a little funky, using a dynamic bitfield. The
40 * routines here exist to pack this */
43 panfrost_pack_work_groups_compute(
44 struct mali_invocation_packed
*out
,
55 /* The values needing packing, in order, and the corresponding shifts.
56 * Indicies into shift are off-by-one to make the logic easier */
58 unsigned shifts
[7] = { 0 };
60 unsigned values
[6] = {
61 MALI_POSITIVE(size_x
),
62 MALI_POSITIVE(size_y
),
63 MALI_POSITIVE(size_z
),
69 for (unsigned i
= 0; i
< 6; ++i
) {
70 /* OR it in, shifting as required */
71 packed
|= (values
[i
] << shifts
[i
]);
73 /* How many bits did we use? */
74 unsigned bit_count
= util_logbase2_ceil(values
[i
] + 1);
76 /* Set the next shift accordingly */
77 shifts
[i
+ 1] = shifts
[i
] + bit_count
;
80 pan_pack(out
, INVOCATION
, cfg
) {
81 cfg
.invocations
= packed
;
82 cfg
.size_y_shift
= shifts
[1];
83 cfg
.size_z_shift
= shifts
[2];
84 cfg
.workgroups_x_shift
= shifts
[3];
85 cfg
.workgroups_y_shift
= shifts
[4];
86 cfg
.workgroups_z_shift
= shifts
[5];
88 /* Quirk: for non-instanced graphics, the blob sets
89 * workgroups_z_shift = 32. This doesn't appear to matter to
90 * the hardware, but it's good to be bit-identical. */
92 if (quirk_graphics
&& (num_z
<= 1))
93 cfg
.workgroups_z_shift
= 32;
95 /* Quirk: for graphics, >= 2. For compute, 2 without barriers
96 * but equal to workgroups_x_shift with barriers */
98 cfg
.unknown_shift
= quirk_graphics
? 2 : cfg
.workgroups_x_shift
;