drivers/gpu/drm/amd/pm/powerplay/hwmgr/common_baco.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/pm/powerplay/hwmgr/common_baco.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/amd/pm/powerplay/hwmgr/common_baco.c- Extension
.c- Size
- 3433 bytes
- Lines
- 121
- Domain
- Driver Families
- Bucket
- drivers/gpu
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
common_baco.h
Detected Declarations
function filesfunction baco_cmd_handlerfunction baco_program_registersfunction soc15_baco_program_registers
Annotated Snippet
#include "common_baco.h"
static bool baco_wait_register(struct pp_hwmgr *hwmgr, u32 reg, u32 mask, u32 value)
{
struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
u32 timeout = 5000, data;
do {
msleep(1);
data = RREG32(reg);
timeout--;
} while (value != (data & mask) && (timeout != 0));
if (timeout == 0)
return false;
return true;
}
static bool baco_cmd_handler(struct pp_hwmgr *hwmgr, u32 command, u32 reg, u32 mask,
u32 shift, u32 value, u32 timeout)
{
struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
u32 data;
bool ret = true;
switch (command) {
case CMD_WRITE:
WREG32(reg, value << shift);
break;
case CMD_READMODIFYWRITE:
data = RREG32(reg);
data = (data & (~mask)) | (value << shift);
WREG32(reg, data);
break;
case CMD_WAITFOR:
ret = baco_wait_register(hwmgr, reg, mask, value);
break;
case CMD_DELAY_MS:
if (timeout)
/* Delay in milli Seconds */
msleep(timeout);
break;
case CMD_DELAY_US:
if (timeout)
/* Delay in micro Seconds */
udelay(timeout);
break;
default:
dev_warn(adev->dev, "Invalid BACO command.\n");
ret = false;
}
return ret;
}
bool baco_program_registers(struct pp_hwmgr *hwmgr,
const struct baco_cmd_entry *entry,
const u32 array_size)
{
u32 i, reg = 0;
for (i = 0; i < array_size; i++) {
if ((entry[i].cmd == CMD_WRITE) ||
(entry[i].cmd == CMD_READMODIFYWRITE) ||
(entry[i].cmd == CMD_WAITFOR))
reg = entry[i].reg_offset;
if (!baco_cmd_handler(hwmgr, entry[i].cmd, reg, entry[i].mask,
entry[i].shift, entry[i].val, entry[i].timeout))
return false;
}
return true;
}
bool soc15_baco_program_registers(struct pp_hwmgr *hwmgr,
const struct soc15_baco_cmd_entry *entry,
const u32 array_size)
{
struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
u32 i, reg = 0;
for (i = 0; i < array_size; i++) {
if ((entry[i].cmd == CMD_WRITE) ||
(entry[i].cmd == CMD_READMODIFYWRITE) ||
(entry[i].cmd == CMD_WAITFOR))
reg = adev->reg_offset[entry[i].hwip][entry[i].inst][entry[i].seg]
+ entry[i].reg_offset;
Annotation
- Immediate include surface: `common_baco.h`.
- Detected declarations: `function files`, `function baco_cmd_handler`, `function baco_program_registers`, `function soc15_baco_program_registers`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.