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drm/amdgpu/gfx: Introduce helpers handling CSB manipulation 

From GFX6 to GFX11, there is a function for getting the CSB buffer to be
put into the hardware. Three common parts are duplicated in all of these
GFX functions:

1. Prepare the CSB preamble.
2. Parser the CS data.
3. End the CSB preamble.

This commit creates helpers to be used from GFX6 to GFX11.

Signed-off-by: Rodrigo Siqueira <siqueira@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rodrigo Siqueira 2025-04-21 16:12:18 -06:00 committed by Alex Deucher
parent 5a2658fda4
commit 9718f7457d
2 changed files with 72 additions and 0 deletions
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69
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
View File

@ -33,6 +33,7 @@
#include "amdgpu_reset.h"
#include "amdgpu_xcp.h"
#include "amdgpu_xgmi.h"
#include "nvd.h"
/* delay 0.1 second to enable gfx off feature */
#define GFX_OFF_DELAY_ENABLE msecs_to_jiffies(100)
@ -2257,6 +2258,74 @@ void amdgpu_gfx_profile_ring_end_use(struct amdgpu_ring *ring)
schedule_delayed_work(&ring->adev->gfx.idle_work, GFX_PROFILE_IDLE_TIMEOUT);
}
/**
* amdgpu_gfx_csb_preamble_start - Set CSB preamble start
*
* @buffer: This is an output variable that gets the PACKET3 preamble setup.
*
* Return:
* return the latest index.
*/
u32 amdgpu_gfx_csb_preamble_start(volatile u32 *buffer)
{
u32 count = 0;
buffer[count++] = cpu_to_le32(PACKET3(PACKET3_PREAMBLE_CNTL, 0));
buffer[count++] = cpu_to_le32(PACKET3_PREAMBLE_BEGIN_CLEAR_STATE);
buffer[count++] = cpu_to_le32(PACKET3(PACKET3_CONTEXT_CONTROL, 1));
buffer[count++] = cpu_to_le32(0x80000000);
buffer[count++] = cpu_to_le32(0x80000000);
return count;
}
/**
* amdgpu_gfx_csb_data_parser - Parser CS data
*
* @adev: amdgpu_device pointer used to get the CS data and other gfx info.
* @buffer: This is an output variable that gets the PACKET3 preamble end.
* @count: Index to start set the preemble end.
*
* Return:
* return the latest index.
*/
u32 amdgpu_gfx_csb_data_parser(struct amdgpu_device *adev, volatile u32 *buffer, u32 count)
{
const struct cs_section_def *sect = NULL;
const struct cs_extent_def *ext = NULL;
u32 i;
for (sect = adev->gfx.rlc.cs_data; sect->section != NULL; ++sect) {
for (ext = sect->section; ext->extent != NULL; ++ext) {
if (sect->id == SECT_CONTEXT) {
buffer[count++] = cpu_to_le32(PACKET3(PACKET3_SET_CONTEXT_REG, ext->reg_count));
buffer[count++] = cpu_to_le32(ext->reg_index - PACKET3_SET_CONTEXT_REG_START);
for (i = 0; i < ext->reg_count; i++)
buffer[count++] = cpu_to_le32(ext->extent[i]);
}
}
}
return count;
}
/**
* amdgpu_gfx_csb_preamble_end - Set CSB preamble end
*
* @buffer: This is an output variable that gets the PACKET3 preamble end.
* @count: Index to start set the preemble end.
*/
void amdgpu_gfx_csb_preamble_end(volatile u32 *buffer, u32 count)
{
buffer[count++] = cpu_to_le32(PACKET3(PACKET3_PREAMBLE_CNTL, 0));
buffer[count++] = cpu_to_le32(PACKET3_PREAMBLE_END_CLEAR_STATE);
buffer[count++] = cpu_to_le32(PACKET3(PACKET3_CLEAR_STATE, 0));
buffer[count++] = cpu_to_le32(0);
}
/*
* debugfs for to enable/disable gfx job submission to specific core.
*/

3
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
View File

@ -599,6 +599,9 @@ void amdgpu_gfx_enforce_isolation_ring_end_use(struct amdgpu_ring *ring);
void amdgpu_gfx_profile_idle_work_handler(struct work_struct *work);
void amdgpu_gfx_profile_ring_begin_use(struct amdgpu_ring *ring);
void amdgpu_gfx_profile_ring_end_use(struct amdgpu_ring *ring);
u32 amdgpu_gfx_csb_preamble_start(volatile u32 *buffer);
u32 amdgpu_gfx_csb_data_parser(struct amdgpu_device *adev, volatile u32 *buffer, u32 count);
void amdgpu_gfx_csb_preamble_end(volatile u32 *buffer, u32 count);
void amdgpu_debugfs_gfx_sched_mask_init(struct amdgpu_device *adev);
void amdgpu_debugfs_compute_sched_mask_init(struct amdgpu_device *adev);