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/*
* Copyright © 2019 Raspberry Pi
*
* Based in part on v3d driver which is:
*
* Copyright © 2014-2017 Broadcom
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "v3dv_private.h"
struct v3dv_cl_reloc
v3dv_write_uniforms(struct v3dv_cmd_buffer *cmd_buffer,
struct v3dv_pipeline_stage *p_stage)
{
struct v3d_uniform_list *uinfo = &p_stage->prog_data.base->uniforms;
struct v3dv_dynamic_state *dynamic = &cmd_buffer->state.dynamic;
/* The hardware always pre-fetches the next uniform (also when there
* aren't any), so we always allocate space for an extra slot. This
* fixes MMU exceptions reported since Linux kernel 5.4 when the
* uniforms fill up the tail bytes of a page in the indirect
* BO. In that scenario, when the hardware pre-fetches after reading
* the last uniform it will read beyond the end of the page and trigger
* the MMU exception.
*/
v3dv_cl_ensure_space(&cmd_buffer->indirect, (uinfo->count + 1) * 4, 4);
struct v3dv_cl_reloc uniform_stream =
v3dv_cl_get_address(&cmd_buffer->indirect);
struct v3dv_cl_out *uniforms =
cl_start(&cmd_buffer->indirect);
for (int i = 0; i < uinfo->count; i++) {
uint32_t data = uinfo->data[i];
switch (uinfo->contents[i]) {
case QUNIFORM_CONSTANT:
cl_aligned_u32(&uniforms, data);
break;
case QUNIFORM_VIEWPORT_X_SCALE:
cl_aligned_f(&uniforms, dynamic->viewport.scale[0][0] * 256.0f);
break;
case QUNIFORM_VIEWPORT_Y_SCALE:
cl_aligned_f(&uniforms, dynamic->viewport.scale[0][1] * 256.0f);
break;
case QUNIFORM_VIEWPORT_Z_OFFSET:
cl_aligned_f(&uniforms, dynamic->viewport.translate[0][2]);
break;
case QUNIFORM_VIEWPORT_Z_SCALE:
cl_aligned_f(&uniforms, dynamic->viewport.scale[0][2]);
break;
default:
unreachable("unsupported quniform_contents uniform type\n");
}
}
cl_end(&cmd_buffer->indirect, uniforms);
return uniform_stream;
}
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