[PATCH 04/51] drm/amdgpu: implement new cgs interface for acpi function
Alex Deucher
alexdeucher at gmail.com
Wed Nov 11 22:17:54 PST 2015
From: Rex Zhu <Rex.Zhu at amd.com>
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 at amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 220 ++++++++++++++++++++++++++++++-
drivers/gpu/drm/amd/include/cgs_common.h | 45 ++++++-
2 files changed, 262 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 8e99514..f901cdc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -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 = {
diff --git a/drivers/gpu/drm/amd/include/cgs_common.h b/drivers/gpu/drm/amd/include/cgs_common.h
index 992dcd8..8bf6ee5 100644
--- a/drivers/gpu/drm/amd/include/cgs_common.h
+++ b/drivers/gpu/drm/amd/include/cgs_common.h
@@ -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 */
--
1.8.3.1
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