1 files changed, 419 insertions, 0 deletions

diff --git a/drivers/accel/amdxdna/aie2_error.c b/drivers/accel/amdxdna/aie2_error.c
new file mode 100644
index 000000000000..d452008ec4f4
--- /dev/null
+++ b/drivers/accel/amdxdna/aie2_error.c
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023-2024, Advanced Micro Devices, Inc.
+ */
+
+#include <drm/drm_cache.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include <drm/gpu_scheduler.h>
+#include <linux/dma-mapping.h>
+#include <linux/kthread.h>
+#include <linux/kernel.h>
+
+#include "aie2_msg_priv.h"
+#include "aie2_pci.h"
+#include "amdxdna_error.h"
+#include "amdxdna_mailbox.h"
+#include "amdxdna_pci_drv.h"
+
+struct async_event {
+	struct amdxdna_dev_hdl		*ndev;
+	struct async_event_msg_resp	resp;
+	struct workqueue_struct		*wq;
+	struct work_struct		work;
+	u8				*buf;
+	dma_addr_t			addr;
+	u32				size;
+};
+
+struct async_events {
+	struct workqueue_struct		*wq;
+	u8				*buf;
+	dma_addr_t			addr;
+	u32				size;
+	u32				event_cnt;
+	struct async_event		event[] __counted_by(event_cnt);
+};
+
+/*
+ * Below enum, struct and lookup tables are porting from XAIE util header file.
+ *
+ * Below data is defined by AIE device and it is used for decode error message
+ * from the device.
+ */
+
+enum aie_module_type {
+	AIE_MEM_MOD = 0,
+	AIE_CORE_MOD,
+	AIE_PL_MOD,
+	AIE_UNKNOWN_MOD,
+};
+
+enum aie_error_category {
+	AIE_ERROR_SATURATION = 0,
+	AIE_ERROR_FP,
+	AIE_ERROR_STREAM,
+	AIE_ERROR_ACCESS,
+	AIE_ERROR_BUS,
+	AIE_ERROR_INSTRUCTION,
+	AIE_ERROR_ECC,
+	AIE_ERROR_LOCK,
+	AIE_ERROR_DMA,
+	AIE_ERROR_MEM_PARITY,
+	/* Unknown is not from XAIE, added for better category */
+	AIE_ERROR_UNKNOWN,
+};
+
+/* Don't pack, unless XAIE side changed */
+struct aie_error {
+	__u8			row;
+	__u8			col;
+	__u32			mod_type;
+	__u8			event_id;
+};
+
+struct aie_err_info {
+	u32			err_cnt;
+	u32			ret_code;
+	u32			rsvd;
+	struct aie_error	payload[] __counted_by(err_cnt);
+};
+
+struct aie_event_category {
+	u8			event_id;
+	enum aie_error_category category;
+};
+
+#define EVENT_CATEGORY(id, cat) { id, cat }
+static const struct aie_event_category aie_ml_mem_event_cat[] = {
+	EVENT_CATEGORY(88U,  AIE_ERROR_ECC),
+	EVENT_CATEGORY(90U,  AIE_ERROR_ECC),
+	EVENT_CATEGORY(91U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(92U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(93U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(94U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(95U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(96U,  AIE_ERROR_MEM_PARITY),
+	EVENT_CATEGORY(97U,  AIE_ERROR_DMA),
+	EVENT_CATEGORY(98U,  AIE_ERROR_DMA),
+	EVENT_CATEGORY(99U,  AIE_ERROR_DMA),
+	EVENT_CATEGORY(100U, AIE_ERROR_DMA),
+	EVENT_CATEGORY(101U, AIE_ERROR_LOCK),
+};
+
+static const struct aie_event_category aie_ml_core_event_cat[] = {
+	EVENT_CATEGORY(55U, AIE_ERROR_ACCESS),
+	EVENT_CATEGORY(56U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(57U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(58U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(59U, AIE_ERROR_INSTRUCTION),
+	EVENT_CATEGORY(60U, AIE_ERROR_ACCESS),
+	EVENT_CATEGORY(62U, AIE_ERROR_ECC),
+	EVENT_CATEGORY(64U, AIE_ERROR_ECC),
+	EVENT_CATEGORY(65U, AIE_ERROR_ACCESS),
+	EVENT_CATEGORY(66U, AIE_ERROR_ACCESS),
+	EVENT_CATEGORY(67U, AIE_ERROR_LOCK),
+	EVENT_CATEGORY(70U, AIE_ERROR_INSTRUCTION),
+	EVENT_CATEGORY(71U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(72U, AIE_ERROR_BUS),
+};
+
+static const struct aie_event_category aie_ml_mem_tile_event_cat[] = {
+	EVENT_CATEGORY(130U, AIE_ERROR_ECC),
+	EVENT_CATEGORY(132U, AIE_ERROR_ECC),
+	EVENT_CATEGORY(133U, AIE_ERROR_DMA),
+	EVENT_CATEGORY(134U, AIE_ERROR_DMA),
+	EVENT_CATEGORY(135U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(136U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(137U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(138U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(139U, AIE_ERROR_LOCK),
+};
+
+static const struct aie_event_category aie_ml_shim_tile_event_cat[] = {
+	EVENT_CATEGORY(64U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(65U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(66U, AIE_ERROR_STREAM),
+	EVENT_CATEGORY(67U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(68U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(69U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(70U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(71U, AIE_ERROR_BUS),
+	EVENT_CATEGORY(72U, AIE_ERROR_DMA),
+	EVENT_CATEGORY(73U, AIE_ERROR_DMA),
+	EVENT_CATEGORY(74U, AIE_ERROR_LOCK),
+};
+
+static const enum amdxdna_error_num aie_cat_err_num_map[] = {
+	[AIE_ERROR_SATURATION] = AMDXDNA_ERROR_NUM_AIE_SATURATION,
+	[AIE_ERROR_FP] = AMDXDNA_ERROR_NUM_AIE_FP,
+	[AIE_ERROR_STREAM] = AMDXDNA_ERROR_NUM_AIE_STREAM,
+	[AIE_ERROR_ACCESS] = AMDXDNA_ERROR_NUM_AIE_ACCESS,
+	[AIE_ERROR_BUS] = AMDXDNA_ERROR_NUM_AIE_BUS,
+	[AIE_ERROR_INSTRUCTION] = AMDXDNA_ERROR_NUM_AIE_INSTRUCTION,
+	[AIE_ERROR_ECC] = AMDXDNA_ERROR_NUM_AIE_ECC,
+	[AIE_ERROR_LOCK] = AMDXDNA_ERROR_NUM_AIE_LOCK,
+	[AIE_ERROR_DMA] = AMDXDNA_ERROR_NUM_AIE_DMA,
+	[AIE_ERROR_MEM_PARITY] = AMDXDNA_ERROR_NUM_AIE_MEM_PARITY,
+	[AIE_ERROR_UNKNOWN] = AMDXDNA_ERROR_NUM_UNKNOWN,
+};
+
+static_assert(ARRAY_SIZE(aie_cat_err_num_map) == AIE_ERROR_UNKNOWN + 1);
+
+static const enum amdxdna_error_module aie_err_mod_map[] = {
+	[AIE_MEM_MOD] = AMDXDNA_ERROR_MODULE_AIE_MEMORY,
+	[AIE_CORE_MOD] = AMDXDNA_ERROR_MODULE_AIE_CORE,
+	[AIE_PL_MOD] = AMDXDNA_ERROR_MODULE_AIE_PL,
+	[AIE_UNKNOWN_MOD] = AMDXDNA_ERROR_MODULE_UNKNOWN,
+};
+
+static_assert(ARRAY_SIZE(aie_err_mod_map) == AIE_UNKNOWN_MOD + 1);
+
+static enum aie_error_category
+aie_get_error_category(u8 row, u8 event_id, enum aie_module_type mod_type)
+{
+	const struct aie_event_category *lut;
+	int num_entry;
+	int i;
+
+	switch (mod_type) {
+	case AIE_PL_MOD:
+		lut = aie_ml_shim_tile_event_cat;
+		num_entry = ARRAY_SIZE(aie_ml_shim_tile_event_cat);
+		break;
+	case AIE_CORE_MOD:
+		lut = aie_ml_core_event_cat;
+		num_entry = ARRAY_SIZE(aie_ml_core_event_cat);
+		break;
+	case AIE_MEM_MOD:
+		if (row == 1) {
+			lut = aie_ml_mem_tile_event_cat;
+			num_entry = ARRAY_SIZE(aie_ml_mem_tile_event_cat);
+		} else {
+			lut = aie_ml_mem_event_cat;
+			num_entry = ARRAY_SIZE(aie_ml_mem_event_cat);
+		}
+		break;
+	default:
+		return AIE_ERROR_UNKNOWN;
+	}
+
+	for (i = 0; i < num_entry; i++) {
+		if (event_id != lut[i].event_id)
+			continue;
+
+		if (lut[i].category > AIE_ERROR_UNKNOWN)
+			return AIE_ERROR_UNKNOWN;
+
+		return lut[i].category;
+	}
+
+	return AIE_ERROR_UNKNOWN;
+}
+
+static void aie2_update_last_async_error(struct amdxdna_dev_hdl *ndev, void *err_info, u32 num_err)
+{
+	struct aie_error *errs = err_info;
+	enum amdxdna_error_module err_mod;
+	enum aie_error_category aie_err;
+	enum amdxdna_error_num err_num;
+	struct aie_error *last_err;
+
+	last_err = &errs[num_err - 1];
+	if (last_err->mod_type >= AIE_UNKNOWN_MOD) {
+		err_num = aie_cat_err_num_map[AIE_ERROR_UNKNOWN];
+		err_mod = aie_err_mod_map[AIE_UNKNOWN_MOD];
+	} else {
+		aie_err = aie_get_error_category(last_err->row,
+						 last_err->event_id,
+						 last_err->mod_type);
+		err_num = aie_cat_err_num_map[aie_err];
+		err_mod = aie_err_mod_map[last_err->mod_type];
+	}
+
+	ndev->last_async_err.err_code = AMDXDNA_ERROR_ENCODE(err_num, err_mod);
+	ndev->last_async_err.ts_us = ktime_to_us(ktime_get_real());
+	ndev->last_async_err.ex_err_code = AMDXDNA_EXTRA_ERR_ENCODE(last_err->row, last_err->col);
+}
+
+static u32 aie2_error_backtrack(struct amdxdna_dev_hdl *ndev, void *err_info, u32 num_err)
+{
+	struct aie_error *errs = err_info;
+	u32 err_col = 0; /* assume that AIE has less than 32 columns */
+	int i;
+
+	/* Get err column bitmap */
+	for (i = 0; i < num_err; i++) {
+		struct aie_error *err = &errs[i];
+		enum aie_error_category cat;
+
+		cat = aie_get_error_category(err->row, err->event_id, err->mod_type);
+		XDNA_ERR(ndev->xdna, "Row: %d, Col: %d, module %d, event ID %d, category %d",
+			 err->row, err->col, err->mod_type,
+			 err->event_id, cat);
+
+		if (err->col >= 32) {
+			XDNA_WARN(ndev->xdna, "Invalid column number");
+			break;
+		}
+
+		err_col |= (1 << err->col);
+	}
+
+	return err_col;
+}
+
+static int aie2_error_async_cb(void *handle, void __iomem *data, size_t size)
+{
+	struct async_event *e = handle;
+
+	if (data) {
+		e->resp.type = readl(data + offsetof(struct async_event_msg_resp, type));
+		wmb(); /* Update status in the end, so that no lock for here */
+		e->resp.status = readl(data + offsetof(struct async_event_msg_resp, status));
+	}
+	queue_work(e->wq, &e->work);
+	return 0;
+}
+
+static int aie2_error_event_send(struct async_event *e)
+{
+	drm_clflush_virt_range(e->buf, e->size); /* device can access */
+	return aie2_register_asyn_event_msg(e->ndev, e->addr, e->size, e,
+					    aie2_error_async_cb);
+}
+
+static void aie2_error_worker(struct work_struct *err_work)
+{
+	struct aie_err_info *info;
+	struct amdxdna_dev *xdna;
+	struct async_event *e;
+	u32 max_err;
+	u32 err_col;
+
+	e = container_of(err_work, struct async_event, work);
+
+	xdna = e->ndev->xdna;
+
+	if (e->resp.status == MAX_AIE2_STATUS_CODE)
+		return;
+
+	e->resp.status = MAX_AIE2_STATUS_CODE;
+
+	print_hex_dump_debug("AIE error: ", DUMP_PREFIX_OFFSET, 16, 4,
+			     e->buf, 0x100, false);
+
+	info = (struct aie_err_info *)e->buf;
+	XDNA_DBG(xdna, "Error count %d return code %d", info->err_cnt, info->ret_code);
+
+	max_err = (e->size - sizeof(*info)) / sizeof(struct aie_error);
+	if (unlikely(info->err_cnt > max_err)) {
+		WARN_ONCE(1, "Error count too large %d\n", info->err_cnt);
+		return;
+	}
+	err_col = aie2_error_backtrack(e->ndev, info->payload, info->err_cnt);
+	if (!err_col) {
+		XDNA_WARN(xdna, "Did not get error column");
+		return;
+	}
+
+	mutex_lock(&xdna->dev_lock);
+	aie2_update_last_async_error(e->ndev, info->payload, info->err_cnt);
+
+	/* Re-sent this event to firmware */
+	if (aie2_error_event_send(e))
+		XDNA_WARN(xdna, "Unable to register async event");
+	mutex_unlock(&xdna->dev_lock);
+}
+
+void aie2_error_async_events_free(struct amdxdna_dev_hdl *ndev)
+{
+	struct amdxdna_dev *xdna = ndev->xdna;
+	struct async_events *events;
+
+	events = ndev->async_events;
+
+	mutex_unlock(&xdna->dev_lock);
+	destroy_workqueue(events->wq);
+	mutex_lock(&xdna->dev_lock);
+
+	dma_free_noncoherent(xdna->ddev.dev, events->size, events->buf,
+			     events->addr, DMA_FROM_DEVICE);
+	kfree(events);
+}
+
+int aie2_error_async_events_alloc(struct amdxdna_dev_hdl *ndev)
+{
+	struct amdxdna_dev *xdna = ndev->xdna;
+	u32 total_col = ndev->total_col;
+	u32 total_size = ASYNC_BUF_SIZE * total_col;
+	struct async_events *events;
+	int i, ret;
+
+	events = kzalloc(struct_size(events, event, total_col), GFP_KERNEL);
+	if (!events)
+		return -ENOMEM;
+
+	events->buf = dma_alloc_noncoherent(xdna->ddev.dev, total_size, &events->addr,
+					    DMA_FROM_DEVICE, GFP_KERNEL);
+	if (!events->buf) {
+		ret = -ENOMEM;
+		goto free_events;
+	}
+	events->size = total_size;
+	events->event_cnt = total_col;
+
+	events->wq = alloc_ordered_workqueue("async_wq", 0);
+	if (!events->wq) {
+		ret = -ENOMEM;
+		goto free_buf;
+	}
+
+	for (i = 0; i < events->event_cnt; i++) {
+		struct async_event *e = &events->event[i];
+		u32 offset = i * ASYNC_BUF_SIZE;
+
+		e->ndev = ndev;
+		e->wq = events->wq;
+		e->buf = &events->buf[offset];
+		e->addr = events->addr + offset;
+		e->size = ASYNC_BUF_SIZE;
+		e->resp.status = MAX_AIE2_STATUS_CODE;
+		INIT_WORK(&e->work, aie2_error_worker);
+
+		ret = aie2_error_event_send(e);
+		if (ret)
+			goto free_wq;
+	}
+
+	ndev->async_events = events;
+
+	XDNA_DBG(xdna, "Async event count %d, buf total size 0x%x",
+		 events->event_cnt, events->size);
+	return 0;
+
+free_wq:
+	destroy_workqueue(events->wq);
+free_buf:
+	dma_free_noncoherent(xdna->ddev.dev, events->size, events->buf,
+			     events->addr, DMA_FROM_DEVICE);
+free_events:
+	kfree(events);
+	return ret;
+}
+
+int aie2_get_array_async_error(struct amdxdna_dev_hdl *ndev, struct amdxdna_drm_get_array *args)
+{
+	struct amdxdna_dev *xdna = ndev->xdna;
+
+	drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+
+	args->num_element = 1;
+	args->element_size = sizeof(ndev->last_async_err);
+	if (copy_to_user(u64_to_user_ptr(args->buffer),
+			 &ndev->last_async_err, args->element_size))
+		return -EFAULT;
+
+	return 0;
+}