From 80cec685ee980cb171f2f73d1df702afbbc0bbb8 Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Tue, 15 Sep 2015 14:44:44 +0800 Subject: [PATCH 0037/1110] drm/amdgpu: implement new cgs interface for acpi function 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 Reviewed-by: Jammy Zhou Reviewed-by: Alex Deucher --- 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 #include #include +#include #include #include #include @@ -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 */ -- 2.7.4