path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_aca.c

/*
 * Copyright 2023 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.
 *
 */

#include <linux/list.h>
#include "amdgpu.h"
#include "amdgpu_aca.h"
#include "amdgpu_ras.h"

#define ACA_BANK_HWID(type, hwid, mcatype) [ACA_HWIP_TYPE_##type] = {hwid, mcatype}

typedef int bank_handler_t(struct aca_handle *handle, struct aca_bank *bank, enum aca_smu_type type, void *data);

static struct aca_hwip aca_hwid_mcatypes[ACA_HWIP_TYPE_COUNT] = {
	ACA_BANK_HWID(SMU,	0x01,	0x01),
	ACA_BANK_HWID(PCS_XGMI, 0x50,	0x00),
	ACA_BANK_HWID(UMC,	0x96,	0x00),
};

static void aca_banks_init(struct aca_banks *banks)
{
	if (!banks)
		return;

	memset(banks, 0, sizeof(*banks));
	INIT_LIST_HEAD(&banks->list);
}

static int aca_banks_add_bank(struct aca_banks *banks, struct aca_bank *bank)
{
	struct aca_bank_node *node;

	if (!bank)
		return -EINVAL;

	node = kvzalloc(sizeof(*node), GFP_KERNEL);
	if (!node)
		return -ENOMEM;

	memcpy(&node->bank, bank, sizeof(*bank));

	INIT_LIST_HEAD(&node->node);
	list_add_tail(&node->node, &banks->list);

	banks->nr_banks++;

	return 0;
}

static void aca_banks_release(struct aca_banks *banks)
{
	struct aca_bank_node *node, *tmp;

	if (list_empty(&banks->list))
		return;

	list_for_each_entry_safe(node, tmp, &banks->list, node) {
		list_del(&node->node);
		kvfree(node);
	}
}

static int aca_smu_get_valid_aca_count(struct amdgpu_device *adev, enum aca_smu_type type, u32 *count)
{
	struct amdgpu_aca *aca = &adev->aca;
	const struct aca_smu_funcs *smu_funcs = aca->smu_funcs;

	if (!count)
		return -EINVAL;

	if (!smu_funcs || !smu_funcs->get_valid_aca_count)
		return -EOPNOTSUPP;

	return smu_funcs->get_valid_aca_count(adev, type, count);
}

static struct aca_regs_dump {
	const char *name;
	int reg_idx;
} aca_regs[] = {
	{"CONTROL",		ACA_REG_IDX_CTL},
	{"STATUS",		ACA_REG_IDX_STATUS},
	{"ADDR",		ACA_REG_IDX_ADDR},
	{"MISC",		ACA_REG_IDX_MISC0},
	{"CONFIG",		ACA_REG_IDX_CONFIG},
	{"IPID",		ACA_REG_IDX_IPID},
	{"SYND",		ACA_REG_IDX_SYND},
	{"DESTAT",		ACA_REG_IDX_DESTAT},
	{"DEADDR",		ACA_REG_IDX_DEADDR},
	{"CONTROL_MASK",	ACA_REG_IDX_CTL_MASK},
};

static void aca_smu_bank_dump(struct amdgpu_device *adev, int idx, int total, struct aca_bank *bank,
			      struct ras_query_context *qctx)
{
	u64 event_id = qctx ? qctx->evid.event_id : RAS_EVENT_INVALID_ID;
	int i;

	RAS_EVENT_LOG(adev, event_id, HW_ERR "Accelerator Check Architecture events logged\n");
	/* plus 1 for output format, e.g: ACA[08/08]: xxxx */
	for (i = 0; i < ARRAY_SIZE(aca_regs); i++)
		RAS_EVENT_LOG(adev, event_id, HW_ERR "ACA[%02d/%02d].%s=0x%016llx\n",
			      idx + 1, total, aca_regs[i].name, bank->regs[aca_regs[i].reg_idx]);
}

static int aca_smu_get_valid_aca_banks(struct amdgpu_device *adev, enum aca_smu_type type,
				       int start, int count,
				       struct aca_banks *banks, struct ras_query_context *qctx)
{
	struct amdgpu_aca *aca = &adev->aca;
	const struct aca_smu_funcs *smu_funcs = aca->smu_funcs;
	struct aca_bank bank;
	int i, max_count, ret;

	if