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drm/amdgpu: implement new cgs interface for acpi function

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Add a new driver internal interface for accessing ACPI
methods.  These will be used by various new components
including powerplay.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2015-09-15 14:44:44 +08:00 committed by Alex Deucher
parent 66dc0ddd02
commit 3f1d35a03b
2 changed files with 262 additions and 3 deletions
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220
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
View file

@ -24,6 +24,7 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <drm/drmP.h>
#include <linux/firmware.h>
#include <drm/amdgpu_drm.h>
@ -32,7 +33,6 @@
#include "atom.h"
#include "amdgpu_ucode.h"
struct amdgpu_cgs_device {
struct cgs_device base;
struct amdgpu_device *adev;
@ -736,6 +736,221 @@ static int amdgpu_cgs_get_firmware_info(void *cgs_device,
return 0;
}
/** \brief evaluate acpi namespace object, handle or pathname must be valid
* \param cgs_device
* \param info input/output arguments for the control method
* \return status
*/
#if defined(CONFIG_ACPI)
static int amdgpu_cgs_acpi_eval_object(void *cgs_device,
struct cgs_acpi_method_info *info)
{
CGS_FUNC_ADEV;
acpi_handle handle;
struct acpi_object_list input;
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *params = NULL;
union acpi_object *obj = NULL;
uint8_t name[5] = {'\0'};
struct cgs_acpi_method_argument *argument = NULL;
uint32_t i, count;
acpi_status status;
int result;
uint32_t func_no = 0xFFFFFFFF;
handle = ACPI_HANDLE(&adev->pdev->dev);
if (!handle)
return -ENODEV;
memset(&input, 0, sizeof(struct acpi_object_list));
/* validate input info */
if (info->size != sizeof(struct cgs_acpi_method_info))
return -EINVAL;
input.count = info->input_count;
if (info->input_count > 0) {
if (info->pinput_argument == NULL)
return -EINVAL;
argument = info->pinput_argument;
func_no = argument->value;
for (i = 0; i < info->input_count; i++) {
if (((argument->type == ACPI_TYPE_STRING) ||
(argument->type == ACPI_TYPE_BUFFER))
&& (argument->pointer == NULL))
return -EINVAL;
argument++;
}
}
if (info->output_count > 0) {
if (info->poutput_argument == NULL)
return -EINVAL;
argument = info->poutput_argument;
for (i = 0; i < info->output_count; i++) {
if (((argument->type == ACPI_TYPE_STRING) ||
(argument->type == ACPI_TYPE_BUFFER))
&& (argument->pointer == NULL))
return -EINVAL;
argument++;
}
}
/* The path name passed to acpi_evaluate_object should be null terminated */
if ((info->field & CGS_ACPI_FIELD_METHOD_NAME) != 0) {
strncpy(name, (char *)&(info->name), sizeof(uint32_t));
name[4] = '\0';
}
/* parse input parameters */
if (input.count > 0) {
input.pointer = params =
kzalloc(sizeof(union acpi_object) * input.count, GFP_KERNEL);
if (params == NULL)
return -EINVAL;
argument = info->pinput_argument;
for (i = 0; i < input.count; i++) {
params->type = argument->type;
switch (params->type) {
case ACPI_TYPE_INTEGER:
params->integer.value = argument->value;
break;
case ACPI_TYPE_STRING:
params->string.length = argument->method_length;
params->string.pointer = argument->pointer;
break;
case ACPI_TYPE_BUFFER:
params->buffer.length = argument->method_length;
params->buffer.pointer = argument->pointer;
break;
default:
break;
}
params++;
argument++;
}
}
/* parse output info */
count = info->output_count;
argument = info->poutput_argument;
/* evaluate the acpi method */
status = acpi_evaluate_object(handle, name, &input, &output);
if (ACPI_FAILURE(status)) {
result = -EIO;
goto error;
}
/* return the output info */
obj = output.pointer;
if (count > 1) {
if ((obj->type != ACPI_TYPE_PACKAGE) ||
(obj->package.count != count)) {
result = -EIO;
goto error;
}
params = obj->package.elements;
} else
params = obj;
if (params == NULL) {
result = -EIO;
goto error;
}
for (i = 0; i < count; i++) {
if (argument->type != params->type) {
result = -EIO;
goto error;
}
switch (params->type) {
case ACPI_TYPE_INTEGER:
argument->value = params->integer.value;
break;
case ACPI_TYPE_STRING:
if ((params->string.length != argument->data_length) ||
(params->string.pointer == NULL)) {
result = -EIO;
goto error;
}
strncpy(argument->pointer,
params->string.pointer,
params->string.length);
break;
case ACPI_TYPE_BUFFER:
if (params->buffer.pointer == NULL) {
result = -EIO;
goto error;
}
memcpy(argument->pointer,
params->buffer.pointer,
argument->data_length);
break;
default:
break;
}
argument++;
params++;
}
error:
if (obj != NULL)
kfree(obj);
kfree((void *)input.pointer);
return result;
}
#else
static int amdgpu_cgs_acpi_eval_object(void *cgs_device,
struct cgs_acpi_method_info *info)
{
return -EIO;
}
#endif
int amdgpu_cgs_call_acpi_method(void *cgs_device,
uint32_t acpi_method,
uint32_t acpi_function,
void *pinput, void *poutput,
uint32_t output_count,
uint32_t input_size,
uint32_t output_size)
{
struct cgs_acpi_method_argument acpi_input[2] = { {0}, {0} };
struct cgs_acpi_method_argument acpi_output = {0};
struct cgs_acpi_method_info info = {0};
acpi_input[0].type = CGS_ACPI_TYPE_INTEGER;
acpi_input[0].method_length = sizeof(uint32_t);
acpi_input[0].data_length = sizeof(uint32_t);
acpi_input[0].value = acpi_function;
acpi_input[1].type = CGS_ACPI_TYPE_BUFFER;
acpi_input[1].method_length = CGS_ACPI_MAX_BUFFER_SIZE;
acpi_input[1].data_length = input_size;
acpi_input[1].pointer = pinput;
acpi_output.type = CGS_ACPI_TYPE_BUFFER;
acpi_output.method_length = CGS_ACPI_MAX_BUFFER_SIZE;
acpi_output.data_length = output_size;
acpi_output.pointer = poutput;
info.size = sizeof(struct cgs_acpi_method_info);
info.field = CGS_ACPI_FIELD_METHOD_NAME | CGS_ACPI_FIELD_INPUT_ARGUMENT_COUNT;
info.input_count = 2;
info.name = acpi_method;
info.pinput_argument = acpi_input;
info.output_count = output_count;
info.poutput_argument = &acpi_output;
return amdgpu_cgs_acpi_eval_object(cgs_device, &info);
}
static const struct cgs_ops amdgpu_cgs_ops = {
amdgpu_cgs_gpu_mem_info,
amdgpu_cgs_gmap_kmem,
@ -768,7 +983,8 @@ static const struct cgs_ops amdgpu_cgs_ops = {
amdgpu_cgs_set_camera_voltages,
amdgpu_cgs_get_firmware_info,
amdgpu_cgs_set_powergating_state,
amdgpu_cgs_set_clockgating_state
amdgpu_cgs_set_clockgating_state,
amdgpu_cgs_call_acpi_method,
};
static const struct cgs_os_ops amdgpu_cgs_os_ops = {

45
drivers/gpu/drm/amd/include/cgs_common.h
View file

@ -129,6 +129,39 @@ struct cgs_firmware_info {
typedef unsigned long cgs_handle_t;
#define CGS_ACPI_METHOD_ATCS 0x53435441
#define CGS_ACPI_METHOD_ATIF 0x46495441
#define CGS_ACPI_METHOD_ATPX 0x58505441
#define CGS_ACPI_FIELD_METHOD_NAME 0x00000001
#define CGS_ACPI_FIELD_INPUT_ARGUMENT_COUNT 0x00000002
#define CGS_ACPI_MAX_BUFFER_SIZE 256
#define CGS_ACPI_TYPE_ANY 0x00
#define CGS_ACPI_TYPE_INTEGER 0x01
#define CGS_ACPI_TYPE_STRING 0x02
#define CGS_ACPI_TYPE_BUFFER 0x03
#define CGS_ACPI_TYPE_PACKAGE 0x04
struct cgs_acpi_method_argument {
uint32_t type;
uint32_t method_length;
uint32_t data_length;
union{
uint32_t value;
void *pointer;
};
};
struct cgs_acpi_method_info {
uint32_t size;
uint32_t field;
uint32_t input_count;
uint32_t name;
struct cgs_acpi_method_argument *pinput_argument;
uint32_t output_count;
struct cgs_acpi_method_argument *poutput_argument;
uint32_t padding[9];
};
/**
* cgs_gpu_mem_info() - Return information about memory heaps
* @cgs_device: opaque device handle
@ -493,6 +526,13 @@ typedef int(*cgs_set_clockgating_state)(void *cgs_device,
enum amd_ip_block_type block_type,
enum amd_clockgating_state state);
typedef int (*cgs_call_acpi_method)(void *cgs_device,
uint32_t acpi_method,
uint32_t acpi_function,
void *pinput, void *poutput,
uint32_t output_count,
uint32_t input_size,
uint32_t output_size);
struct cgs_ops {
/* memory management calls (similar to KFD interface) */
cgs_gpu_mem_info_t gpu_mem_info;
@ -533,7 +573,8 @@ struct cgs_ops {
/* cg pg interface*/
cgs_set_powergating_state set_powergating_state;
cgs_set_clockgating_state set_clockgating_state;
/* ACPI (TODO) */
/* ACPI */
cgs_call_acpi_method call_acpi_method;
};
struct cgs_os_ops; /* To be define in OS-specific CGS header */
@ -620,5 +661,7 @@ struct cgs_device
CGS_CALL(set_powergating_state, dev, block_type, state)
#define cgs_set_clockgating_state(dev, block_type, state) \
CGS_CALL(set_clockgating_state, dev, block_type, state)
#define cgs_call_acpi_method(dev, acpi_method, acpi_function, pintput, poutput, output_count, input_size, output_size) \
CGS_CALL(call_acpi_method, dev, acpi_method, acpi_function, pintput, poutput, output_count, input_size, output_size)
#endif /* _CGS_COMMON_H */