[PATCH v2] drm/amdgpu: refine create and release logic of hive info
Dennis Li
Dennis.Li at amd.com
Tue Aug 18 11:42:54 UTC 2020
Change to dynamically create and release hive info object,
which help driver support more hives in the future.
v2:
Change to save hive object pointer in adev, to avoid locking
xgmi_mutex every time when calling amdgpu_get_xgmi_hive.
Signed-off-by: Dennis Li <Dennis.Li at amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 98d0c6e5ab3c..894886d6381b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -730,7 +730,7 @@ struct amdgpu_device {
#ifdef CONFIG_DRM_AMD_ACP
struct amdgpu_acp acp;
#endif
-
+ void *hive;
/* ASIC */
enum amd_asic_type asic_type;
uint32_t family;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f323281c82b0..bc6ef0caf157 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2857,7 +2857,7 @@ static void amdgpu_device_xgmi_reset_func(struct work_struct *__work)
{
struct amdgpu_device *adev =
container_of(__work, struct amdgpu_device, xgmi_reset_work);
- struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0);
+ struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);
/* It's a bug to not have a hive within this function */
if (WARN_ON(!hive))
@@ -2895,6 +2895,7 @@ static void amdgpu_device_xgmi_reset_func(struct work_struct *__work)
if (adev->asic_reset_res)
DRM_WARN("ASIC reset failed with error, %d for drm dev, %s",
adev->asic_reset_res, adev->ddev->unique);
+ amdgpu_put_xgmi_hive(hive);
}
static int amdgpu_device_get_job_timeout_settings(struct amdgpu_device *adev)
@@ -4315,7 +4316,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
* We always reset all schedulers for device and all devices for XGMI
* hive so that should take care of them too.
*/
- hive = amdgpu_get_xgmi_hive(adev, false);
+ hive = amdgpu_get_xgmi_hive(adev);
if (hive) {
if (atomic_cmpxchg(&hive->in_reset, 0, 1) != 0) {
DRM_INFO("Bailing on TDR for s_job:%llx, hive: %llx as another already in progress",
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index bf71f0a58786..18cdd259d568 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1555,9 +1555,10 @@ static void amdgpu_ras_do_recovery(struct work_struct *work)
struct amdgpu_device *remote_adev = NULL;
struct amdgpu_device *adev = ras->adev;
struct list_head device_list, *device_list_handle = NULL;
- struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, false);
if (!ras->disable_ras_err_cnt_harvest) {
+ struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);
+
/* Build list of devices to query RAS related errors */
if (hive && adev->gmc.xgmi.num_physical_nodes > 1) {
device_list_handle = &hive->device_list;
@@ -1570,6 +1571,8 @@ static void amdgpu_ras_do_recovery(struct work_struct *work)
list_for_each_entry(remote_adev,
device_list_handle, gmc.xgmi.head)
amdgpu_ras_log_on_err_counter(remote_adev);
+
+ amdgpu_put_xgmi_hive(hive);
}
if (amdgpu_device_should_recover_gpu(ras->adev))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 7a61dc6738eb..c6bd5f0c1339 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -35,11 +35,9 @@
static DEFINE_MUTEX(xgmi_mutex);
-#define AMDGPU_MAX_XGMI_HIVE 8
#define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4
-static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE];
-static unsigned hive_count = 0;
+static LIST_HEAD(xgmi_hive_list);
static const int xgmi_pcs_err_status_reg_vg20[] = {
smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS,
@@ -171,59 +169,47 @@ static const struct amdgpu_pcs_ras_field wafl_pcs_ras_fields[] = {
*
*/
+static struct attribute amdgpu_xgmi_hive_id = {
+ .name = "xgmi_hive_id",
+ .mode = S_IRUGO
+};
-static ssize_t amdgpu_xgmi_show_hive_id(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct amdgpu_hive_info *hive =
- container_of(attr, struct amdgpu_hive_info, dev_attr);
-
- return snprintf(buf, PAGE_SIZE, "%llu\n", hive->hive_id);
-}
+static struct attribute *amdgpu_xgmi_hive_attrs[] = {
+ &amdgpu_xgmi_hive_id,
+ NULL
+};
-static int amdgpu_xgmi_sysfs_create(struct amdgpu_device *adev,
- struct amdgpu_hive_info *hive)
+static ssize_t amdgpu_xgmi_show_attrs(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
- int ret = 0;
+ struct amdgpu_hive_info *hive = container_of(
+ kobj, struct amdgpu_hive_info, kobj);
- if (WARN_ON(hive->kobj))
- return -EINVAL;
-
- hive->kobj = kobject_create_and_add("xgmi_hive_info", &adev->dev->kobj);
- if (!hive->kobj) {
- dev_err(adev->dev, "XGMI: Failed to allocate sysfs entry!\n");
- return -EINVAL;
- }
-
- hive->dev_attr = (struct device_attribute) {
- .attr = {
- .name = "xgmi_hive_id",
- .mode = S_IRUGO,
+ if (attr == &amdgpu_xgmi_hive_id)
+ return snprintf(buf, PAGE_SIZE, "%llu\n", hive->hive_id);
- },
- .show = amdgpu_xgmi_show_hive_id,
- };
-
- ret = sysfs_create_file(hive->kobj, &hive->dev_attr.attr);
- if (ret) {
- dev_err(adev->dev, "XGMI: Failed to create device file xgmi_hive_id\n");
- kobject_del(hive->kobj);
- kobject_put(hive->kobj);
- hive->kobj = NULL;
- }
-
- return ret;
+ return 0;
}
-static void amdgpu_xgmi_sysfs_destroy(struct amdgpu_device *adev,
- struct amdgpu_hive_info *hive)
+static void amdgpu_xgmi_hive_release(struct kobject *kobj)
{
- sysfs_remove_file(hive->kobj, &hive->dev_attr.attr);
- kobject_del(hive->kobj);
- kobject_put(hive->kobj);
- hive->kobj = NULL;
+ struct amdgpu_hive_info *hive = container_of(
+ kobj, struct amdgpu_hive_info, kobj);
+
+ mutex_destroy(&hive->hive_lock);
+ kfree(hive);
}
+static const struct sysfs_ops amdgpu_xgmi_hive_ops = {
+ .show = amdgpu_xgmi_show_attrs,
+};
+
+struct kobj_type amdgpu_xgmi_hive_type = {
+ .release = amdgpu_xgmi_hive_release,
+ .sysfs_ops = &amdgpu_xgmi_hive_ops,
+ .default_attrs = amdgpu_xgmi_hive_attrs,
+};
+
static ssize_t amdgpu_xgmi_show_device_id(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -287,8 +273,8 @@ static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev,
/* Create sysfs link to hive info folder on the first device */
- if (adev != hive->adev) {
- ret = sysfs_create_link(&adev->dev->kobj, hive->kobj,
+ if (hive->kobj.parent != (&adev->dev->kobj)) {
+ ret = sysfs_create_link(&adev->dev->kobj, &hive->kobj,
"xgmi_hive_info");
if (ret) {
dev_err(adev->dev, "XGMI: Failed to create link to hive info");
@@ -296,9 +282,9 @@ static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev,
}
}
- sprintf(node, "node%d", hive->number_devices);
+ sprintf(node, "node%d", atomic_read(&hive->number_devices));
/* Create sysfs link form the hive folder to yourself */
- ret = sysfs_create_link(hive->kobj, &adev->dev->kobj, node);
+ ret = sysfs_create_link(&hive->kobj, &adev->dev->kobj, node);
if (ret) {
dev_err(adev->dev, "XGMI: Failed to create link from hive info");
goto remove_link;
@@ -326,78 +312,97 @@ static void amdgpu_xgmi_sysfs_rem_dev_info(struct amdgpu_device *adev,
device_remove_file(adev->dev, &dev_attr_xgmi_device_id);
device_remove_file(adev->dev, &dev_attr_xgmi_error);
- if (adev != hive->adev)
+ if (hive->kobj.parent != (&adev->dev->kobj))
sysfs_remove_link(&adev->dev->kobj,"xgmi_hive_info");
- sprintf(node, "node%d", hive->number_devices);
- sysfs_remove_link(hive->kobj, node);
+ sprintf(node, "node%d", atomic_read(&hive->number_devices));
+ sysfs_remove_link(&hive->kobj, node);
}
-struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock)
+struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
{
- int i;
- struct amdgpu_hive_info *tmp;
+ struct amdgpu_hive_info *hive = NULL, *tmp = NULL;
+ int ret = 0;
if (!adev->gmc.xgmi.hive_id)
return NULL;
+ if (adev->hive) {
+ hive = (struct amdgpu_hive_info *)adev->hive;
+ kobject_get(&hive->kobj);
+ return hive;
+ }
+
mutex_lock(&xgmi_mutex);
- for (i = 0 ; i < hive_count; ++i) {
- tmp = &xgmi_hives[i];
- if (tmp->hive_id == adev->gmc.xgmi.hive_id) {
- if (lock)
- mutex_lock(&tmp->hive_lock);
- mutex_unlock(&xgmi_mutex);
- return tmp;
+ if (!list_empty(&xgmi_hive_list)) {
+ list_for_each_entry_safe(hive, tmp, &xgmi_hive_list, node) {
+ if (hive->hive_id == adev->gmc.xgmi.hive_id)
+ goto pro_end;
}
}
- if (i >= AMDGPU_MAX_XGMI_HIVE) {
- mutex_unlock(&xgmi_mutex);
- return NULL;
+
+ hive = kzalloc(sizeof(*hive), GFP_KERNEL);
+ if (!hive) {
+ dev_err(adev->dev, "XGMI: allocation failed\n");
+ hive = NULL;
+ goto pro_end;
}
/* initialize new hive if not exist */
- tmp = &xgmi_hives[hive_count++];
-
- if (amdgpu_xgmi_sysfs_create(adev, tmp)) {
- mutex_unlock(&xgmi_mutex);
- return NULL;
+ ret = kobject_init_and_add(&hive->kobj,
+ &amdgpu_xgmi_hive_type,
+ &adev->dev->kobj,
+ "%s", "xgmi_hive_info");
+ if (ret) {
+ dev_err(adev->dev, "XGMI: failed initializing kobject for xgmi hive\n");
+ kfree(hive);
+ hive = NULL;
+ goto pro_end;
}
- tmp->adev = adev;
- tmp->hive_id = adev->gmc.xgmi.hive_id;
- INIT_LIST_HEAD(&tmp->device_list);
- mutex_init(&tmp->hive_lock);
- atomic_set(&tmp->in_reset, 0);
- task_barrier_init(&tmp->tb);
-
- if (lock)
- mutex_lock(&tmp->hive_lock);
- tmp->pstate = AMDGPU_XGMI_PSTATE_UNKNOWN;
- tmp->hi_req_gpu = NULL;
+ hive->hive_id = adev->gmc.xgmi.hive_id;
+ INIT_LIST_HEAD(&hive->device_list);
+ INIT_LIST_HEAD(&hive->node);
+ mutex_init(&hive->hive_lock);
+ atomic_set(&hive->in_reset, 0);
+ atomic_set(&hive->number_devices, 0);
+ task_barrier_init(&hive->tb);
+ hive->pstate = AMDGPU_XGMI_PSTATE_UNKNOWN;
+ hive->hi_req_gpu = NULL;
/*
* hive pstate on boot is high in vega20 so we have to go to low
* pstate on after boot.
*/
- tmp->hi_req_count = AMDGPU_MAX_XGMI_DEVICE_PER_HIVE;
+ hive->hi_req_count = AMDGPU_MAX_XGMI_DEVICE_PER_HIVE;
+ list_add_tail(&hive->node, &xgmi_hive_list);
+
+pro_end:
+ if (hive)
+ kobject_get(&hive->kobj);
mutex_unlock(&xgmi_mutex);
+ return hive;
+}
- return tmp;
+void amdgpu_put_xgmi_hive(struct amdgpu_hive_info *hive)
+{
+ if (hive)
+ kobject_put(&hive->kobj);
}
int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate)
{
int ret = 0;
- struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0);
+ struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);
struct amdgpu_device *request_adev = hive->hi_req_gpu ?
hive->hi_req_gpu : adev;
bool is_hi_req = pstate == AMDGPU_XGMI_PSTATE_MAX_VEGA20;
bool init_low = hive->pstate == AMDGPU_XGMI_PSTATE_UNKNOWN;
+ amdgpu_put_xgmi_hive(hive);
/* fw bug so temporarily disable pstate switching */
return 0;
@@ -449,7 +454,7 @@ int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_dev
/* Each psp need to set the latest topology */
ret = psp_xgmi_set_topology_info(&adev->psp,
- hive->number_devices,
+ atomic_read(&hive->number_devices),
&adev->psp.xgmi_context.top_info);
if (ret)
dev_err(adev->dev,
@@ -511,7 +516,7 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
adev->gmc.xgmi.node_id = adev->gmc.xgmi.physical_node_id + 16;
}
- hive = amdgpu_get_xgmi_hive(adev, 1);
+ hive = amdgpu_get_xgmi_hive(adev);
if (!hive) {
ret = -EINVAL;
dev_err(adev->dev,
@@ -519,6 +524,7 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
adev->gmc.xgmi.node_id, adev->gmc.xgmi.hive_id);
goto exit;
}
+ mutex_lock(&hive->hive_lock);
top_info = &adev->psp.xgmi_context.top_info;
@@ -526,7 +532,7 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
list_for_each_entry(entry, &hive->device_list, head)
top_info->nodes[count++].node_id = entry->node_id;
top_info->num_nodes = count;
- hive->number_devices = count;
+ atomic_set(&hive->number_devices, count);
task_barrier_add_task(&hive->tb);
@@ -565,35 +571,49 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
exit_unlock:
mutex_unlock(&hive->hive_lock);
exit:
- if (!ret)
+ if (!ret) {
+ adev->hive = hive;
dev_info(adev->dev, "XGMI: Add node %d, hive 0x%llx.\n",
adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id);
- else
+ } else {
+ amdgpu_put_xgmi_hive(hive);
dev_err(adev->dev, "XGMI: Failed to add node %d, hive 0x%llx ret: %d\n",
adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id,
ret);
+ }
return ret;
}
int amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
{
- struct amdgpu_hive_info *hive;
+ struct amdgpu_hive_info *hive =
+ (struct amdgpu_hive_info *) adev->hive;
if (!adev->gmc.xgmi.supported)
return -EINVAL;
- hive = amdgpu_get_xgmi_hive(adev, 1);
if (!hive)
return -EINVAL;
+ mutex_lock(&hive->hive_lock);
task_barrier_rem_task(&hive->tb);
amdgpu_xgmi_sysfs_rem_dev_info(adev, hive);
+ if (hive->hi_req_gpu == adev)
+ hive->hi_req_gpu = NULL;
+ list_del(&adev->gmc.xgmi.head);
mutex_unlock(&hive->hive_lock);
- if(!(--hive->number_devices)){
- amdgpu_xgmi_sysfs_destroy(adev, hive);
- mutex_destroy(&hive->hive_lock);
+ amdgpu_put_xgmi_hive(hive);
+ adev->hive = NULL;
+
+ if (atomic_dec_return(&hive->number_devices) == 0) {
+ /* Remove the hive from global hive list */
+ mutex_lock(&xgmi_mutex);
+ list_del(&hive->node);
+ mutex_unlock(&xgmi_mutex);
+
+ amdgpu_put_xgmi_hive(hive);
}
return psp_xgmi_terminate(&adev->psp);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index 453336ca9675..148560d63554 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -27,13 +27,12 @@
struct amdgpu_hive_info {
- uint64_t hive_id;
- struct list_head device_list;
- int number_devices;
+ struct kobject kobj;
+ uint64_t hive_id;
+ struct list_head device_list;
+ struct list_head node;
+ atomic_t number_devices;
struct mutex hive_lock;
- struct kobject *kobj;
- struct device_attribute dev_attr;
- struct amdgpu_device *adev;
atomic_t in_reset;
int hi_req_count;
struct amdgpu_device *hi_req_gpu;
@@ -51,7 +50,8 @@ struct amdgpu_pcs_ras_field {
uint32_t pcs_err_shift;
};
-struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock);
+struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev);
+void amdgpu_put_xgmi_hive(struct amdgpu_hive_info *hive);
int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
int amdgpu_xgmi_remove_device(struct amdgpu_device *adev);
--
2.17.1
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