path: root/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c

/*
 * Copyright 2020 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#define SWSMU_CODE_LAYER_L4

#include "amdgpu.h"
#include "amdgpu_smu.h"
#include "smu_cmn.h"
#include "soc15_common.h"

/*
 * DO NOT use these for err/warn/info/debug messages.
 * Use dev_err, dev_warn, dev_info and dev_dbg instead.
 * They are more MGPU friendly.
 */
#undef pr_err
#undef pr_warn
#undef pr_info
#undef pr_debug

#define MP1_C2PMSG_90__CONTENT_MASK                                                                    0xFFFFFFFFL

const int link_speed[] = {25, 50, 80, 160, 320, 640};

#undef __SMU_DUMMY_MAP
#define __SMU_DUMMY_MAP(type)	#type
static const char * const __smu_message_names[] = {
	SMU_MESSAGE_TYPES
};

#define smu_cmn_call_asic_func(intf, smu, args...)                             \
	((smu)->ppt_funcs ? ((smu)->ppt_funcs->intf ?                          \
				     (smu)->ppt_funcs->intf(smu, ##args) :     \
				     -ENOTSUPP) :                              \
			    -EINVAL)

static const char *smu_get_message_name(struct smu_context *smu,
					enum smu_message_type type)
{
	if (type >= SMU_MSG_MAX_COUNT)
		return "unknown smu message";

	return __smu_message_names[type];
}

static void smu_cmn_read_arg(struct smu_context *smu,
			     uint32_t *arg)
{
	struct amdgpu_device *adev = smu->adev;

	*arg = RREG32(smu->param_reg);
}

/* Redefine the SMU error codes here.
 *
 * Note that these definitions are redundant and should be removed
 * when the SMU has exported a unified header file containing these
 * macros, which header file we can just include and use the SMU's
 * macros. At the moment, these error codes are defined by the SMU
 * per-ASIC unfortunately, yet we're a one driver for all ASICs.
 */
#define SMU_RESP_NONE           0
#define SMU_RESP_OK             1
#define SMU_RESP_CMD_FAIL       0xFF
#define SMU_RESP_CMD_UNKNOWN    0xFE
#define SMU_RESP_CMD_BAD_PREREQ 0xFD
#define SMU_RESP_BUSY_OTHER     0xFC
#define SMU_RESP_DEBUG_END      0xFB

/**
 * __smu_cmn_poll_stat -- poll for a status from the SMU
 * @smu: a pointer to SMU context
 *
 * Returns the status of the SMU, which could be,
 *    0, the SMU is busy with your command;
 *    1, execution status: success, execution result: success;
 * 0xFF, execution status: success, execution result: failure;
 * 0xFE, unknown command;
 * 0xFD, valid command, but bad (command) prerequisites;
 * 0xFC, the command was rejected as the SMU is busy;
 * 0xFB, "SMC_Result_DebugDataDumpEnd".
 *
 * The values here are not defined by macros, because I'd rather we
 * include a single header file which defines them, which is
 * maintained by the SMU FW team, so that we're impervious to firmware
 * changes. At the moment those values are defined in various header
 * files, one for each ASIC, yet here we're a single ASIC-agnostic
 * interface. Such a change can be followed-up by a subsequent patch.
 */
static u32 __smu_cmn_poll_stat(struct smu_context *smu)
{
	struct amdgpu_device *adev = smu->adev;
	int timeout = adev->usec_timeout * 20;
	u32 reg;

	for ( ; timeout > 0; timeout--) {
		reg = RREG32(smu->resp_reg);
		if ((reg & MP1_C2PMSG_90__CONTENT_MASK) != 0)
			break;

		udelay(1);
	}

	return reg;
}

static void __smu_cmn_reg_print_error(struct smu_context *smu,
				      u32 reg_c2pmsg_90,
				      int msg_index,
				      u32 param,
				      enum smu_message_type msg)
{
	struct amdgpu_device *adev = smu->adev;
	const char *message = smu_get_message_name(smu, msg);
	u32 msg_idx, prm;

	switch (reg_c2pmsg_90) {
	case SMU_RESP_NONE: {
		msg_idx = RREG32(smu->msg_reg);
		prm     = RREG32(smu->param_reg);
		dev_err_ratelimited(adev->dev,
				    "SMU: I'm not done with your previous command: SMN_C2PMSG_66:0x%08X SMN_C2PMSG_82:0x%08X",
				    msg_idx, prm);
		}
		break;
	case SMU_RESP_OK:
		/* The SMU executed the command. It completed with a
		 * successful result.
		 */
		break;
	case SMU_RESP_CMD_FAIL:
		/* The SMU executed the command. It completed with an
		 * unsuccessful result.
		 */
		break;
	case SMU_RESP_CMD_UNKNOWN:
		dev_err_ratelimited(adev->dev,
				    "SMU: unknown command: index:%d param:0x%08X message:%s",
				    msg_index, param, message);
		break;
	case SMU_RESP_CMD_BAD_PREREQ:
		dev_err_ratelimited(adev->dev,
				    "SMU: valid command, bad prerequisites: index:%d param:0x%08X message:%s"