--- /dev/null
+/*
+ * Copyright 2018 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/debugfs.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include "amdgpu.h"
+#include "amdgpu_ras.h"
+
+struct ras_ih_data {
+ /* interrupt bottom half */
+ struct work_struct ih_work;
+ int inuse;
+ /* IP callback */
+ ras_ih_cb cb;
+ /* full of entries */
+ unsigned char *ring;
+ unsigned int ring_size;
+ unsigned int element_size;
+ unsigned int aligned_element_size;
+ unsigned int rptr;
+ unsigned int wptr;
+};
+
+struct ras_fs_data {
+ char sysfs_name[32];
+ char debugfs_name[32];
+};
+
+struct ras_err_data {
+ unsigned long ue_count;
+ unsigned long ce_count;
+};
+
+struct ras_err_handler_data {
+ /* point to bad pages array */
+ struct {
+ unsigned long bp;
+ struct amdgpu_bo *bo;
+ } *bps;
+ /* the count of entries */
+ int count;
+ /* the space can place new entries */
+ int space_left;
+ /* last reserved entry's index + 1 */
+ int last_reserved;
+};
+
+struct ras_manager {
+ struct ras_common_if head;
+ /* reference count */
+ int use;
+ /* ras block link */
+ struct list_head node;
+ /* the device */
+ struct amdgpu_device *adev;
+ /* debugfs */
+ struct dentry *ent;
+ /* sysfs */
+ struct device_attribute sysfs_attr;
+ int attr_inuse;
+
+ /* fs node name */
+ struct ras_fs_data fs_data;
+
+ /* IH data */
+ struct ras_ih_data ih_data;
+
+ struct ras_err_data err_data;
+};
+
+const char *ras_error_string[] = {
+ "none",
+ "parity",
+ "single_correctable",
+ "multi_uncorrectable",
+ "poison",
+};
+
+const char *ras_block_string[] = {
+ "umc",
+ "sdma",
+ "gfx",
+ "mmhub",
+ "athub",
+ "pcie_bif",
+ "hdp",
+ "xgmi_wafl",
+ "df",
+ "smn",
+ "sem",
+ "mp0",
+ "mp1",
+ "fuse",
+};
+
+#define ras_err_str(i) (ras_error_string[ffs(i)])
+#define ras_block_str(i) (ras_block_string[i])
+
+static void amdgpu_ras_self_test(struct amdgpu_device *adev)
+{
+ /* TODO */
+}
+
+static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf,
+ size_t size, loff_t *pos)
+{
+ struct ras_manager *obj = (struct ras_manager *)file_inode(f)->i_private;
+ struct ras_query_if info = {
+ .head = obj->head,
+ };
+ ssize_t s;
+ char val[128];
+
+ if (amdgpu_ras_error_query(obj->adev, &info))
+ return -EINVAL;
+
+ s = snprintf(val, sizeof(val), "%s: %lu\n%s: %lu\n",
+ "ue", info.ue_count,
+ "ce", info.ce_count);
+ if (*pos >= s)
+ return 0;
+
+ s -= *pos;
+ s = min_t(u64, s, size);
+
+
+ if (copy_to_user(buf, &val[*pos], s))
+ return -EINVAL;
+
+ *pos += s;
+
+ return s;
+}
+
+static ssize_t amdgpu_ras_debugfs_write(struct file *f, const char __user *buf,
+ size_t size, loff_t *pos)
+{
+ struct ras_manager *obj = (struct ras_manager *)file_inode(f)->i_private;
+ struct ras_inject_if info = {
+ .head = obj->head,
+ };
+ ssize_t s = min_t(u64, 64, size);
+ char val[64];
+ char *str = val;
+ memset(val, 0, sizeof(val));
+
+ if (*pos)
+ return -EINVAL;
+
+ if (copy_from_user(str, buf, s))
+ return -EINVAL;
+
+ /* only care ue/ce for now. */
+ if (memcmp(str, "ue", 2) == 0) {
+ info.head.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
+ str += 2;
+ } else if (memcmp(str, "ce", 2) == 0) {
+ info.head.type = AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE;
+ str += 2;
+ }
+
+ if (sscanf(str, "0x%llx 0x%llx", &info.address, &info.value) != 2) {
+ if (sscanf(str, "%llu %llu", &info.address, &info.value) != 2)
+ return -EINVAL;
+ }
+
+ *pos = s;
+
+ if (amdgpu_ras_error_inject(obj->adev, &info))
+ return -EINVAL;
+
+ return size;
+}
+
+static const struct file_operations amdgpu_ras_debugfs_ops = {
+ .owner = THIS_MODULE,
+ .read = amdgpu_ras_debugfs_read,
+ .write = amdgpu_ras_debugfs_write,
+ .llseek = default_llseek
+};
+
+static ssize_t amdgpu_ras_sysfs_read(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ras_manager *obj = container_of(attr, struct ras_manager, sysfs_attr);
+ struct ras_query_if info = {
+ .head = obj->head,
+ };
+
+ if (amdgpu_ras_error_query(obj->adev, &info))
+ return -EINVAL;
+
+ return snprintf(buf, PAGE_SIZE, "%s: %lu\n%s: %lu\n",
+ "ue", info.ue_count,
+ "ce", info.ce_count);
+}
+
+/* obj begin */
+
+#define get_obj(obj) do { (obj)->use++; } while (0)
+#define alive_obj(obj) ((obj)->use)
+
+static inline void put_obj(struct ras_manager *obj)
+{
+ if (obj && --obj->use == 0)
+ list_del(&obj->node);
+ if (obj && obj->use < 0) {
+ DRM_ERROR("RAS ERROR: Unbalance obj(%s) use\n", obj->head.name);
+ }
+}
+
+/* make one obj and return it. */
+static struct ras_manager *amdgpu_ras_create_obj(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj;
+
+ if (!con)
+ return NULL;
+
+ if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
+ return NULL;
+
+ obj = &con->objs[head->block];
+ /* already exist. return obj? */
+ if (alive_obj(obj))
+ return NULL;
+
+ obj->head = *head;
+ obj->adev = adev;
+ list_add(&obj->node, &con->head);
+ get_obj(obj);
+
+ return obj;
+}
+
+/* return an obj equal to head, or the first when head is NULL */
+static struct ras_manager *amdgpu_ras_find_obj(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj;
+ int i;
+
+ if (!con)
+ return NULL;
+
+ if (head) {
+ if (head->block >= AMDGPU_RAS_BLOCK_COUNT)
+ return NULL;
+
+ obj = &con->objs[head->block];
+
+ if (alive_obj(obj)) {
+ WARN_ON(head->block != obj->head.block);
+ return obj;
+ }
+ } else {
+ for (i = 0; i < AMDGPU_RAS_BLOCK_COUNT; i++) {
+ obj = &con->objs[i];
+ if (alive_obj(obj)) {
+ WARN_ON(i != obj->head.block);
+ return obj;
+ }
+ }
+ }
+
+ return NULL;
+}
+/* obj end */
+
+/* feature ctl begin */
+static int amdgpu_ras_is_feature_allowed(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ return amdgpu_ras_enable && (amdgpu_ras_mask & BIT(head->block));
+}
+
+static int amdgpu_ras_is_feature_enabled(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+
+ return con->features & BIT(head->block);
+}
+
+/*
+ * if obj is not created, then create one.
+ * set feature enable flag.
+ */
+static int __amdgpu_ras_feature_enable(struct amdgpu_device *adev,
+ struct ras_common_if *head, int enable)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
+
+ if (!amdgpu_ras_is_feature_allowed(adev, head))
+ return 0;
+ if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head)))
+ return 0;
+
+ if (enable) {
+ if (!obj) {
+ obj = amdgpu_ras_create_obj(adev, head);
+ if (!obj)
+ return -EINVAL;
+ } else {
+ /* In case we create obj somewhere else */
+ get_obj(obj);
+ }
+ con->features |= BIT(head->block);
+ } else {
+ if (obj && amdgpu_ras_is_feature_enabled(adev, head)) {
+ con->features &= ~BIT(head->block);
+ put_obj(obj);
+ }
+ }
+
+ return 0;
+}
+
+/* wrapper of psp_ras_enable_features */
+int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
+ struct ras_common_if *head, bool enable)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ union ta_ras_cmd_input info;
+ int ret;
+
+ if (!con)
+ return -EINVAL;
+
+ if (!enable) {
+ info.disable_features = (struct ta_ras_disable_features_input) {
+ .block_id = head->block,
+ .error_type = head->type,
+ };
+ } else {
+ info.enable_features = (struct ta_ras_enable_features_input) {
+ .block_id = head->block,
+ .error_type = head->type,
+ };
+ }
+
+ /* Do not enable if it is not allowed. */
+ WARN_ON(enable && !amdgpu_ras_is_feature_allowed(adev, head));
+ /* Are we alerady in that state we are going to set? */
+ if (!(!!enable ^ !!amdgpu_ras_is_feature_enabled(adev, head)))
+ return 0;
+
+ ret = psp_ras_enable_features(&adev->psp, &info, enable);
+ if (ret) {
+ DRM_ERROR("RAS ERROR: %s %s feature failed ret %d\n",
+ enable ? "enable":"disable",
+ ras_block_str(head->block),
+ ret);
+ return -EINVAL;
+ }
+
+ /* setup the obj */
+ __amdgpu_ras_feature_enable(adev, head, enable);
+
+ return 0;
+}
+
+static int amdgpu_ras_disable_all_features(struct amdgpu_device *adev,
+ bool bypass)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj, *tmp;
+
+ list_for_each_entry_safe(obj, tmp, &con->head, node) {
+ /* bypass psp.
+ * aka just release the obj and corresponding flags
+ */
+ if (bypass) {
+ if (__amdgpu_ras_feature_enable(adev, &obj->head, 0))
+ break;
+ } else {
+ if (amdgpu_ras_feature_enable(adev, &obj->head, 0))
+ break;
+ }
+ };
+
+ return con->features;
+}
+
+static int amdgpu_ras_enable_all_features(struct amdgpu_device *adev,
+ bool bypass)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ int ras_block_count = AMDGPU_RAS_BLOCK_COUNT;
+ int i;
+
+ for (i = 0; i < ras_block_count; i++) {
+ struct ras_common_if head = {
+ .block = i,
+ .type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE,
+ .sub_block_index = 0,
+ };
+ strcpy(head.name, ras_block_str(i));
+ if (bypass) {
+ /*
+ * bypass psp. vbios enable ras for us.
+ * so just create the obj
+ */
+ if (__amdgpu_ras_feature_enable(adev, &head, 1))
+ break;
+ } else {
+ if (amdgpu_ras_feature_enable(adev, &head, 1))
+ break;
+ }
+ };
+
+ return con->features;
+}
+/* feature ctl end */
+
+/* query/inject/cure begin */
+int amdgpu_ras_error_query(struct amdgpu_device *adev,
+ struct ras_query_if *info)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
+
+ if (!obj)
+ return -EINVAL;
+ /* TODO might read the register to read the count */
+
+ info->ue_count = obj->err_data.ue_count;
+ info->ce_count = obj->err_data.ce_count;
+
+ return 0;
+}
+
+/* wrapper of psp_ras_trigger_error */
+int amdgpu_ras_error_inject(struct amdgpu_device *adev,
+ struct ras_inject_if *info)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
+ struct ta_ras_trigger_error_input block_info = {
+ .block_id = info->head.block,
+ .inject_error_type = info->head.type,
+ .sub_block_index = info->head.sub_block_index,
+ .address = info->address,
+ .value = info->value,
+ };
+ int ret = 0;
+
+ if (!obj)
+ return -EINVAL;
+
+ ret = psp_ras_trigger_error(&adev->psp, &block_info);
+ if (ret)
+ DRM_ERROR("RAS ERROR: inject %s error failed ret %d\n",
+ ras_block_str(info->head.block),
+ ret);
+
+ return ret;
+}
+
+int amdgpu_ras_error_cure(struct amdgpu_device *adev,
+ struct ras_cure_if *info)
+{
+ /* psp fw has no cure interface for now. */
+ return 0;
+}
+
+/* get the total error counts on all IPs */
+int amdgpu_ras_query_error_count(struct amdgpu_device *adev,
+ bool is_ce)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj;
+ struct ras_err_data data = {0, 0};
+
+ if (!con)
+ return -EINVAL;
+
+ list_for_each_entry(obj, &con->head, node) {
+ struct ras_query_if info = {
+ .head = obj->head,
+ };
+
+ if (amdgpu_ras_error_query(adev, &info))
+ return -EINVAL;
+
+ data.ce_count += info.ce_count;
+ data.ue_count += info.ue_count;
+ }
+
+ return is_ce ? data.ce_count : data.ue_count;
+}
+/* query/inject/cure end */
+
+
+/* sysfs begin */
+
+static ssize_t amdgpu_ras_sysfs_features_read(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct amdgpu_ras *con =
+ container_of(attr, struct amdgpu_ras, features_attr);
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = ddev->dev_private;
+ struct ras_common_if head;
+ int ras_block_count = AMDGPU_RAS_BLOCK_COUNT;
+ int i;
+ ssize_t s;
+ struct ras_manager *obj;
+
+ s = scnprintf(buf, PAGE_SIZE, "feature mask: 0x%x\n", con->features);
+
+ for (i = 0; i < ras_block_count; i++) {
+ head.block = i;
+
+ if (amdgpu_ras_is_feature_enabled(adev, &head)) {
+ obj = amdgpu_ras_find_obj(adev, &head);
+ s += scnprintf(&buf[s], PAGE_SIZE - s,
+ "%s: %s\n",
+ ras_block_str(i),
+ ras_err_str(obj->head.type));
+ } else
+ s += scnprintf(&buf[s], PAGE_SIZE - s,
+ "%s: disabled\n",
+ ras_block_str(i));
+ }
+
+ return s;
+}
+
+static int amdgpu_ras_sysfs_create_feature_node(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct attribute *attrs[] = {
+ &con->features_attr.attr,
+ NULL
+ };
+ struct attribute_group group = {
+ .name = "ras",
+ .attrs = attrs,
+ };
+
+ con->features_attr = (struct device_attribute) {
+ .attr = {
+ .name = "features",
+ .mode = S_IRUGO,
+ },
+ .show = amdgpu_ras_sysfs_features_read,
+ };
+
+ return sysfs_create_group(&adev->dev->kobj, &group);
+}
+
+static int amdgpu_ras_sysfs_remove_feature_node(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct attribute *attrs[] = {
+ &con->features_attr.attr,
+ NULL
+ };
+ struct attribute_group group = {
+ .name = "ras",
+ .attrs = attrs,
+ };
+
+ sysfs_remove_group(&adev->dev->kobj, &group);
+
+ return 0;
+}
+
+int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
+ struct ras_fs_if *head)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
+
+ if (!obj || obj->attr_inuse)
+ return -EINVAL;
+
+ get_obj(obj);
+
+ memcpy(obj->fs_data.sysfs_name,
+ head->sysfs_name,
+ sizeof(obj->fs_data.sysfs_name));
+
+ obj->sysfs_attr = (struct device_attribute){
+ .attr = {
+ .name = obj->fs_data.sysfs_name,
+ .mode = S_IRUGO,
+ },
+ .show = amdgpu_ras_sysfs_read,
+ };
+
+ if (sysfs_add_file_to_group(&adev->dev->kobj,
+ &obj->sysfs_attr.attr,
+ "ras")) {
+ put_obj(obj);
+ return -EINVAL;
+ }
+
+ obj->attr_inuse = 1;
+
+ return 0;
+}
+
+int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
+
+ if (!obj || !obj->attr_inuse)
+ return -EINVAL;
+
+ sysfs_remove_file_from_group(&adev->dev->kobj,
+ &obj->sysfs_attr.attr,
+ "ras");
+ obj->attr_inuse = 0;
+ put_obj(obj);
+
+ return 0;
+}
+
+static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj, *tmp;
+
+ list_for_each_entry_safe(obj, tmp, &con->head, node) {
+ amdgpu_ras_sysfs_remove(adev, &obj->head);
+ }
+
+ amdgpu_ras_sysfs_remove_feature_node(adev);
+
+ return 0;
+}
+/* sysfs end */
+
+/* debugfs begin */
+int amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
+ struct ras_fs_if *head)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
+ struct dentry *ent;
+
+ if (!obj || obj->ent)
+ return -EINVAL;
+
+ get_obj(obj);
+
+ memcpy(obj->fs_data.debugfs_name,
+ head->debugfs_name,
+ sizeof(obj->fs_data.debugfs_name));
+
+ ent = debugfs_create_file(obj->fs_data.debugfs_name,
+ S_IWUGO | S_IRUGO, con->dir,
+ obj, &amdgpu_ras_debugfs_ops);
+
+ if (IS_ERR(ent))
+ return -EINVAL;
+
+ obj->ent = ent;
+
+ return 0;
+}
+
+int amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
+ struct ras_common_if *head)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
+
+ if (!obj || !obj->ent)
+ return 0;
+
+ debugfs_remove(obj->ent);
+ obj->ent = NULL;
+ put_obj(obj);
+
+ return 0;
+}
+
+static int amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj, *tmp;
+
+ list_for_each_entry_safe(obj, tmp, &con->head, node) {
+ amdgpu_ras_debugfs_remove(adev, &obj->head);
+ }
+
+ debugfs_remove(con->dir);
+ con->dir = NULL;
+
+ return 0;
+}
+/* debugfs end */
+
+/* ras fs */
+
+static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct drm_minor *minor = adev->ddev->primary;
+ struct dentry *root = minor->debugfs_root, *dir;
+
+ dir = debugfs_create_dir("ras", root);
+ if (IS_ERR(dir))
+ return -EINVAL;
+
+ con->dir = dir;
+
+ amdgpu_ras_sysfs_create_feature_node(adev);
+
+ return 0;
+}
+
+static int amdgpu_ras_fs_fini(struct amdgpu_device *adev)
+{
+ amdgpu_ras_debugfs_remove_all(adev);
+ amdgpu_ras_sysfs_remove_all(adev);
+ return 0;
+}
+/* ras fs end */
+
+/* ih begin */
+static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
+{
+ struct ras_ih_data *data = &obj->ih_data;
+ struct amdgpu_iv_entry entry;
+ int ret;
+
+ while (data->rptr != data->wptr) {
+ rmb();
+ memcpy(&entry, &data->ring[data->rptr],
+ data->element_size);
+
+ wmb();
+ data->rptr = (data->aligned_element_size +
+ data->rptr) % data->ring_size;
+
+ /* Let IP handle its data, maybe we need get the output
+ * from the callback to udpate the error type/count, etc
+ */
+ if (data->cb) {
+ ret = data->cb(obj->adev, &entry);
+ /* ue will trigger an interrupt, and in that case
+ * we need do a reset to recovery the whole system.
+ * But leave IP do that recovery, here we just dispatch
+ * the error.
+ */
+ if (ret == AMDGPU_RAS_UE) {
+ obj->err_data.ue_count++;
+ }
+ /* Might need get ce count by register, but not all IP
+ * saves ce count, some IP just use one bit or two bits
+ * to indicate ce happened.
+ */
+ }
+ }
+}
+
+static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)
+{
+ struct ras_ih_data *data =
+ container_of(work, struct ras_ih_data, ih_work);
+ struct ras_manager *obj =
+ container_of(data, struct ras_manager, ih_data);
+
+ amdgpu_ras_interrupt_handler(obj);
+}
+
+int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
+ struct ras_dispatch_if *info)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
+ struct ras_ih_data *data = &obj->ih_data;
+
+ if (!obj)
+ return -EINVAL;
+
+ if (data->inuse == 0)
+ return 0;
+
+ /* Might be overflow... */
+ memcpy(&data->ring[data->wptr], info->entry,
+ data->element_size);
+
+ wmb();
+ data->wptr = (data->aligned_element_size +
+ data->wptr) % data->ring_size;
+
+ schedule_work(&data->ih_work);
+
+ return 0;
+}
+
+int amdgpu_ras_interrupt_remove_handler(struct amdgpu_device *adev,
+ struct ras_ih_if *info)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
+ struct ras_ih_data *data;
+
+ if (!obj)
+ return -EINVAL;
+
+ data = &obj->ih_data;
+ if (data->inuse == 0)
+ return 0;
+
+ cancel_work_sync(&data->ih_work);
+
+ kfree(data->ring);
+ memset(data, 0, sizeof(*data));
+ put_obj(obj);
+
+ return 0;
+}
+
+int amdgpu_ras_interrupt_add_handler(struct amdgpu_device *adev,
+ struct ras_ih_if *info)
+{
+ struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
+ struct ras_ih_data *data;
+
+ if (!obj) {
+ /* in case we registe the IH before enable ras feature */
+ obj = amdgpu_ras_create_obj(adev, &info->head);
+ if (!obj)
+ return -EINVAL;
+ } else
+ get_obj(obj);
+
+ data = &obj->ih_data;
+ /* add the callback.etc */
+ *data = (struct ras_ih_data) {
+ .inuse = 0,
+ .cb = info->cb,
+ .element_size = sizeof(struct amdgpu_iv_entry),
+ .rptr = 0,
+ .wptr = 0,
+ };
+
+ INIT_WORK(&data->ih_work, amdgpu_ras_interrupt_process_handler);
+
+ data->aligned_element_size = ALIGN(data->element_size, 8);
+ /* the ring can store 64 iv entries. */
+ data->ring_size = 64 * data->aligned_element_size;
+ data->ring = kmalloc(data->ring_size, GFP_KERNEL);
+ if (!data->ring) {
+ put_obj(obj);
+ return -ENOMEM;
+ }
+
+ /* IH is ready */
+ data->inuse = 1;
+
+ return 0;
+}
+
+static int amdgpu_ras_interrupt_remove_all(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_manager *obj, *tmp;
+
+ list_for_each_entry_safe(obj, tmp, &con->head, node) {
+ struct ras_ih_if info = {
+ .head = obj->head,
+ };
+ amdgpu_ras_interrupt_remove_handler(adev, &info);
+ }
+
+ return 0;
+}
+/* ih end */
+
+/* recovery begin */
+static void amdgpu_ras_do_recovery(struct work_struct *work)
+{
+ struct amdgpu_ras *ras =
+ container_of(work, struct amdgpu_ras, recovery_work);
+
+ amdgpu_device_gpu_recover(ras->adev, 0);
+ atomic_set(&ras->in_recovery, 0);
+}
+
+static int amdgpu_ras_release_vram(struct amdgpu_device *adev,
+ struct amdgpu_bo **bo_ptr)
+{
+ /* no need to free it actually. */
+ amdgpu_bo_free_kernel(bo_ptr, NULL, NULL);
+ return 0;
+}
+
+/* reserve vram with size@offset */
+static int amdgpu_ras_reserve_vram(struct amdgpu_device *adev,
+ uint64_t offset, uint64_t size,
+ struct amdgpu_bo **bo_ptr)
+{
+ struct ttm_operation_ctx ctx = { false, false };
+ struct amdgpu_bo_param bp;
+ int r = 0;
+ int i;
+ struct amdgpu_bo *bo;
+
+ if (bo_ptr)
+ *bo_ptr = NULL;
+ memset(&bp, 0, sizeof(bp));
+ bp.size = size;
+ bp.byte_align = PAGE_SIZE;
+ bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
+ bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
+ AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
+ bp.type = ttm_bo_type_kernel;
+ bp.resv = NULL;
+
+ r = amdgpu_bo_create(adev, &bp, &bo);
+ if (r)
+ return -EINVAL;
+
+ r = amdgpu_bo_reserve(bo, false);
+ if (r)
+ goto error_reserve;
+
+ offset = ALIGN(offset, PAGE_SIZE);
+ for (i = 0; i < bo->placement.num_placement; ++i) {
+ bo->placements[i].fpfn = offset >> PAGE_SHIFT;
+ bo->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
+ }
+
+ ttm_bo_mem_put(&bo->tbo, &bo->tbo.mem);
+ r = ttm_bo_mem_space(&bo->tbo, &bo->placement, &bo->tbo.mem, &ctx);
+ if (r)
+ goto error_pin;
+
+ r = amdgpu_bo_pin_restricted(bo,
+ AMDGPU_GEM_DOMAIN_VRAM,
+ offset,
+ offset + size);
+ if (r)
+ goto error_pin;
+
+ if (bo_ptr)
+ *bo_ptr = bo;
+
+ amdgpu_bo_unreserve(bo);
+ return r;
+
+error_pin:
+ amdgpu_bo_unreserve(bo);
+error_reserve:
+ amdgpu_bo_unref(&bo);
+ return r;
+}
+
+/* alloc/realloc bps array */
+static int amdgpu_ras_realloc_eh_data_space(struct amdgpu_device *adev,
+ struct ras_err_handler_data *data, int pages)
+{
+ unsigned int old_space = data->count + data->space_left;
+ unsigned int new_space = old_space + pages;
+ unsigned int align_space = ALIGN(new_space, 1024);
+ void *tmp = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL);
+
+ if (!tmp)
+ return -ENOMEM;
+
+ if (data->bps) {
+ memcpy(tmp, data->bps,
+ data->count * sizeof(*data->bps));
+ kfree(data->bps);
+ }
+
+ data->bps = tmp;
+ data->space_left += align_space - old_space;
+ return 0;
+}
+
+/* it deal with vram only. */
+int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
+ unsigned long *bps, int pages)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_err_handler_data *data = con->eh_data;
+ int i = pages;
+ int ret = 0;
+
+ if (!con || !data || !bps || pages <= 0)
+ return 0;
+
+ mutex_lock(&con->recovery_lock);
+ if (!data)
+ goto out;
+
+ if (data->space_left <= pages)
+ if (amdgpu_ras_realloc_eh_data_space(adev, data, pages)) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ while (i--)
+ data->bps[data->count++].bp = bps[i];
+
+ data->space_left -= pages;
+out:
+ mutex_unlock(&con->recovery_lock);
+
+ return ret;
+}
+
+/* called in gpu recovery/init */
+int amdgpu_ras_reserve_bad_pages(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_err_handler_data *data = con->eh_data;
+ uint64_t bp;
+ struct amdgpu_bo *bo;
+ int i;
+
+ if (!con || !data)
+ return 0;
+
+ mutex_lock(&con->recovery_lock);
+ /* reserve vram at driver post stage. */
+ for (i = data->last_reserved; i < data->count; i++) {
+ bp = data->bps[i].bp;
+
+ if (amdgpu_ras_reserve_vram(adev, bp << PAGE_SHIFT,
+ PAGE_SIZE, &bo))
+ DRM_ERROR("RAS ERROR: reserve vram %llx fail\n", bp);
+
+ data->bps[i].bo = bo;
+ data->last_reserved = i + 1;
+ }
+ mutex_unlock(&con->recovery_lock);
+ return 0;
+}
+
+/* called when driver unload */
+static int amdgpu_ras_release_bad_pages(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_err_handler_data *data = con->eh_data;
+ struct amdgpu_bo *bo;
+ int i;
+
+ if (!con || !data)
+ return 0;
+
+ mutex_lock(&con->recovery_lock);
+ for (i = data->last_reserved - 1; i >= 0; i--) {
+ bo = data->bps[i].bo;
+
+ amdgpu_ras_release_vram(adev, &bo);
+
+ data->bps[i].bo = bo;
+ data->last_reserved = i;
+ }
+ mutex_unlock(&con->recovery_lock);
+ return 0;
+}
+
+static int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev)
+{
+ /* TODO
+ * write the array to eeprom when SMU disabled.
+ */
+ return 0;
+}
+
+static int amdgpu_ras_load_bad_pages(struct amdgpu_device *adev)
+{
+ /* TODO
+ * read the array to eeprom when SMU disabled.
+ */
+ return 0;
+}
+
+static int amdgpu_ras_recovery_init(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_err_handler_data **data = &con->eh_data;
+
+ *data = kmalloc(sizeof(**data),
+ GFP_KERNEL|__GFP_ZERO);
+ if (!*data)
+ return -ENOMEM;
+
+ mutex_init(&con->recovery_lock);
+ INIT_WORK(&con->recovery_work, amdgpu_ras_do_recovery);
+ atomic_set(&con->in_recovery, 0);
+ con->adev = adev;
+
+ amdgpu_ras_load_bad_pages(adev);
+ amdgpu_ras_reserve_bad_pages(adev);
+
+ return 0;
+}
+
+static int amdgpu_ras_recovery_fini(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ struct ras_err_handler_data *data = con->eh_data;
+
+ cancel_work_sync(&con->recovery_work);
+ amdgpu_ras_save_bad_pages(adev);
+ amdgpu_ras_release_bad_pages(adev);
+
+ mutex_lock(&con->recovery_lock);
+ con->eh_data = NULL;
+ kfree(data->bps);
+ kfree(data);
+ mutex_unlock(&con->recovery_lock);
+
+ return 0;
+}
+/* recovery end */
+
+struct ras_DID_capability {
+ u16 did;
+ u8 rid;
+ u32 capability;
+};
+
+static const struct ras_DID_capability supported_DID_array[] = {
+ {0x66a0, 0x00, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a0, 0x02, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a1, 0x00, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a1, 0x01, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a1, 0x04, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a3, 0x00, AMDGPU_RAS_BLOCK_MASK},
+ {0x66a7, 0x00, AMDGPU_RAS_BLOCK_MASK},
+};
+
+static uint32_t amdgpu_ras_check_supported(struct amdgpu_device *adev)
+{
+ /* TODO need check vbios table */
+ int i;
+ int did = adev->pdev->device;
+ int rid = adev->pdev->revision;
+
+ for (i = 0; i < ARRAY_SIZE(supported_DID_array); i++) {
+ if (did == supported_DID_array[i].did &&
+ rid == supported_DID_array[i].rid) {
+ return supported_DID_array[i].capability;
+ }
+ }
+ return 0;
+}
+
+int amdgpu_ras_init(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+ uint32_t supported = amdgpu_ras_check_supported(adev);
+
+ if (con || supported == 0)
+ return 0;
+
+ con = kmalloc(sizeof(struct amdgpu_ras) +
+ sizeof(struct ras_manager) * AMDGPU_RAS_BLOCK_COUNT,
+ GFP_KERNEL|__GFP_ZERO);
+ if (!con)
+ return -ENOMEM;
+
+ con->objs = (struct ras_manager *)(con + 1);
+
+ amdgpu_ras_set_context(adev, con);
+
+ con->supported = supported;
+ con->features = 0;
+ INIT_LIST_HEAD(&con->head);
+
+ if (amdgpu_ras_recovery_init(adev))
+ goto recovery_out;
+
+ amdgpu_ras_mask &= AMDGPU_RAS_BLOCK_MASK;
+
+ amdgpu_ras_enable_all_features(adev, 1);
+
+ if (amdgpu_ras_fs_init(adev))
+ goto fs_out;
+
+ amdgpu_ras_self_test(adev);
+ return 0;
+fs_out:
+ amdgpu_ras_recovery_fini(adev);
+recovery_out:
+ amdgpu_ras_set_context(adev, NULL);
+ kfree(con);
+
+ return -EINVAL;
+}
+
+/* do some fini work before IP fini as dependence */
+int amdgpu_ras_pre_fini(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+
+ if (!con)
+ return 0;
+
+ /* Need disable ras on all IPs here before ip [hw/sw]fini */
+ amdgpu_ras_disable_all_features(adev, 0);
+ amdgpu_ras_recovery_fini(adev);
+ return 0;
+}
+
+int amdgpu_ras_fini(struct amdgpu_device *adev)
+{
+ struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+
+ if (!con)
+ return 0;
+
+ amdgpu_ras_fs_fini(adev);
+ amdgpu_ras_interrupt_remove_all(adev);
+
+ WARN(con->features, "Feature mask is not cleared");
+
+ if (con->features)
+ amdgpu_ras_disable_all_features(adev, 1);
+
+ amdgpu_ras_set_context(adev, NULL);
+ kfree(con);
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright 2018 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.
+ *
+ *
+ */
+#ifndef _AMDGPU_RAS_H
+#define _AMDGPU_RAS_H
+
+#include <linux/debugfs.h>
+#include <linux/list.h>
+#include "amdgpu.h"
+#include "amdgpu_psp.h"
+#include "ta_ras_if.h"
+
+enum amdgpu_ras_block {
+ AMDGPU_RAS_BLOCK__UMC = 0,
+ AMDGPU_RAS_BLOCK__SDMA,
+ AMDGPU_RAS_BLOCK__GFX,
+ AMDGPU_RAS_BLOCK__MMHUB,
+ AMDGPU_RAS_BLOCK__ATHUB,
+ AMDGPU_RAS_BLOCK__PCIE_BIF,
+ AMDGPU_RAS_BLOCK__HDP,
+ AMDGPU_RAS_BLOCK__XGMI_WAFL,
+ AMDGPU_RAS_BLOCK__DF,
+ AMDGPU_RAS_BLOCK__SMN,
+ AMDGPU_RAS_BLOCK__SEM,
+ AMDGPU_RAS_BLOCK__MP0,
+ AMDGPU_RAS_BLOCK__MP1,
+ AMDGPU_RAS_BLOCK__FUSE,
+
+ AMDGPU_RAS_BLOCK__LAST
+};
+
+#define AMDGPU_RAS_BLOCK_COUNT AMDGPU_RAS_BLOCK__LAST
+#define AMDGPU_RAS_BLOCK_MASK ((1ULL << AMDGPU_RAS_BLOCK_COUNT) - 1)
+
+enum amdgpu_ras_error_type {
+ AMDGPU_RAS_ERROR__NONE = 0,
+ AMDGPU_RAS_ERROR__PARITY = 1,
+ AMDGPU_RAS_ERROR__SINGLE_CORRECTABLE = 2,
+ AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE = 4,
+ AMDGPU_RAS_ERROR__POISON = 8,
+};
+
+enum amdgpu_ras_ret {
+ AMDGPU_RAS_SUCCESS = 0,
+ AMDGPU_RAS_FAIL,
+ AMDGPU_RAS_UE,
+ AMDGPU_RAS_CE,
+ AMDGPU_RAS_PT,
+};
+
+struct ras_common_if {
+ enum amdgpu_ras_block block;
+ enum amdgpu_ras_error_type type;
+ uint32_t sub_block_index;
+ /* block name */
+ char name[32];
+};
+
+typedef int (*ras_ih_cb)(struct amdgpu_device *adev,
+ struct amdgpu_iv_entry *entry);
+
+struct amdgpu_ras {
+ /* ras infrastructure */
+ uint32_t supported;
+ uint32_t features;
+ struct list_head head;
+ /* debugfs */
+ struct dentry *dir;
+ /* sysfs */
+ struct device_attribute features_attr;
+ /* block array */
+ struct ras_manager *objs;
+
+ /* gpu recovery */
+ struct work_struct recovery_work;
+ atomic_t in_recovery;
+ struct amdgpu_device *adev;
+ /* error handler data */
+ struct ras_err_handler_data *eh_data;
+ struct mutex recovery_lock;
+};
+
+/* interfaces for IP */
+
+struct ras_fs_if {
+ struct ras_common_if head;
+ char sysfs_name[32];
+ char debugfs_name[32];
+};
+
+struct ras_query_if {
+ struct ras_common_if head;
+ unsigned long ue_count;
+ unsigned long ce_count;
+};
+
+struct ras_inject_if {
+ struct ras_common_if head;
+ uint64_t address;
+ uint64_t value;
+};
+
+struct ras_cure_if {
+ struct ras_common_if head;
+ uint64_t address;
+};
+
+struct ras_ih_if {
+ struct ras_common_if head;
+ ras_ih_cb cb;
+};
+
+struct ras_dispatch_if {
+ struct ras_common_if head;
+ struct amdgpu_iv_entry *entry;
+};
+
+/* work flow
+ * vbios
+ * 1: ras feature enable (enabled by default)
+ * psp
+ * 2: ras framework init (in ip_init)
+ * IP
+ * 3: IH add
+ * 4: debugfs/sysfs create
+ * 5: query/inject
+ * 6: debugfs/sysfs remove
+ * 7: IH remove
+ * 8: feature disable
+ */
+
+#define amdgpu_ras_get_context(adev) ((adev)->psp.ras.ras)
+#define amdgpu_ras_set_context(adev, ras_con) ((adev)->psp.ras.ras = (ras_con))
+
+/* check if ras is supported on block, say, sdma, gfx */
+static inline int amdgpu_ras_is_supported(struct amdgpu_device *adev,
+ unsigned int block)
+{
+ struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
+
+ return ras && (ras->supported & (1 << block));
+}
+
+int amdgpu_ras_query_error_count(struct amdgpu_device *adev,
+ bool is_ce);
+
+/* error handling functions */
+int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
+ unsigned long *bps, int pages);
+
+int amdgpu_ras_reserve_bad_pages(struct amdgpu_device *adev);
+
+static inline int amdgpu_ras_reset_gpu(struct amdgpu_device *adev,
+ bool is_baco)
+{
+ struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
+
+ if (atomic_cmpxchg(&ras->in_recovery, 0, 1) == 0)
+ schedule_work(&ras->recovery_work);
+ return 0;
+}
+
+/* called in ip_init and ip_fini */
+int amdgpu_ras_init(struct amdgpu_device *adev);
+int amdgpu_ras_fini(struct amdgpu_device *adev);
+int amdgpu_ras_pre_fini(struct amdgpu_device *adev);
+
+int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
+ struct ras_common_if *head, bool enable);
+
+int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
+ struct ras_fs_if *head);
+
+int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
+ struct ras_common_if *head);
+
+int amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
+ struct ras_fs_if *head);
+
+int amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
+ struct ras_common_if *head);
+
+int amdgpu_ras_error_query(struct amdgpu_device *adev,
+ struct ras_query_if *info);
+
+int amdgpu_ras_error_inject(struct amdgpu_device *adev,
+ struct ras_inject_if *info);
+
+int amdgpu_ras_interrupt_add_handler(struct amdgpu_device *adev,
+ struct ras_ih_if *info);
+
+int amdgpu_ras_interrupt_remove_handler(struct amdgpu_device *adev,
+ struct ras_ih_if *info);
+
+int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
+ struct ras_dispatch_if *info);
+#endif
projects / linux-2.6-microblaze.git / commitdiff