#include "adf_common_drv.h"
static LIST_HEAD(accel_table);
+static LIST_HEAD(vfs_table);
static DEFINE_MUTEX(table_lock);
static uint32_t num_devices;
+struct vf_id_map {
+ u32 bdf;
+ u32 id;
+ u32 fake_id;
+ bool attached;
+ struct list_head list;
+};
+
+static int adf_get_vf_id(struct adf_accel_dev *vf)
+{
+ return ((7 * (PCI_SLOT(accel_to_pci_dev(vf)->devfn) - 1)) +
+ PCI_FUNC(accel_to_pci_dev(vf)->devfn) +
+ (PCI_SLOT(accel_to_pci_dev(vf)->devfn) - 1));
+}
+
+static int adf_get_vf_num(struct adf_accel_dev *vf)
+{
+ return (accel_to_pci_dev(vf)->bus->number << 8) | adf_get_vf_id(vf);
+}
+
+static struct vf_id_map *adf_find_vf(u32 bdf)
+{
+ struct list_head *itr;
+
+ list_for_each(itr, &vfs_table) {
+ struct vf_id_map *ptr =
+ list_entry(itr, struct vf_id_map, list);
+
+ if (ptr->bdf == bdf)
+ return ptr;
+ }
+ return NULL;
+}
+
+static int adf_get_vf_real_id(u32 fake)
+{
+ struct list_head *itr;
+
+ list_for_each(itr, &vfs_table) {
+ struct vf_id_map *ptr =
+ list_entry(itr, struct vf_id_map, list);
+ if (ptr->fake_id == fake)
+ return ptr->id;
+ }
+ return -1;
+}
+
+/**
+ * adf_clean_vf_map() - Cleans VF id mapings
+ *
+ * Function cleans internal ids for virtual functions.
+ * @vf: flag indicating whether mappings is cleaned
+ * for vfs only or for vfs and pfs
+ */
+void adf_clean_vf_map(bool vf)
+{
+ struct vf_id_map *map;
+ struct list_head *ptr, *tmp;
+
+ mutex_lock(&table_lock);
+ list_for_each_safe(ptr, tmp, &vfs_table) {
+ map = list_entry(ptr, struct vf_id_map, list);
+ if (map->bdf != -1)
+ num_devices--;
+
+ if (vf && map->bdf == -1)
+ continue;
+
+ list_del(ptr);
+ kfree(map);
+ }
+ mutex_unlock(&table_lock);
+}
+EXPORT_SYMBOL_GPL(adf_clean_vf_map);
+
+/**
+ * adf_devmgr_update_class_index() - Update internal index
+ * @hw_data: Pointer to internal device data.
+ *
+ * Function updates internal dev index for VFs
+ */
+void adf_devmgr_update_class_index(struct adf_hw_device_data *hw_data)
+{
+ struct adf_hw_device_class *class = hw_data->dev_class;
+ struct list_head *itr;
+ int i = 0;
+
+ list_for_each(itr, &accel_table) {
+ struct adf_accel_dev *ptr =
+ list_entry(itr, struct adf_accel_dev, list);
+
+ if (ptr->hw_device->dev_class == class)
+ ptr->hw_device->instance_id = i++;
+
+ if (i == class->instances)
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(adf_devmgr_update_class_index);
+
/**
* adf_devmgr_add_dev() - Add accel_dev to the acceleration framework
* @accel_dev: Pointer to acceleration device.
+ * @pf: Corresponding PF if the accel_dev is a VF
*
* Function adds acceleration device to the acceleration framework.
* To be used by QAT device specific drivers.
*
- * Return: 0 on success, error code othewise.
+ * Return: 0 on success, error code otherwise.
*/
-int adf_devmgr_add_dev(struct adf_accel_dev *accel_dev)
+int adf_devmgr_add_dev(struct adf_accel_dev *accel_dev,
+ struct adf_accel_dev *pf)
{
struct list_head *itr;
+ int ret = 0;
if (num_devices == ADF_MAX_DEVICES) {
dev_err(&GET_DEV(accel_dev), "Only support up to %d devices\n",
}
mutex_lock(&table_lock);
- list_for_each(itr, &accel_table) {
- struct adf_accel_dev *ptr =
+ atomic_set(&accel_dev->ref_count, 0);
+
+ /* PF on host or VF on guest */
+ if (!accel_dev->is_vf || (accel_dev->is_vf && !pf)) {
+ struct vf_id_map *map;
+
+ list_for_each(itr, &accel_table) {
+ struct adf_accel_dev *ptr =
list_entry(itr, struct adf_accel_dev, list);
- if (ptr == accel_dev) {
- mutex_unlock(&table_lock);
- return -EEXIST;
+ if (ptr == accel_dev) {
+ ret = -EEXIST;
+ goto unlock;
+ }
}
+
+ list_add_tail(&accel_dev->list, &accel_table);
+ accel_dev->accel_id = num_devices++;
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+ map->bdf = ~0;
+ map->id = accel_dev->accel_id;
+ map->fake_id = map->id;
+ map->attached = true;
+ list_add_tail(&map->list, &vfs_table);
+ } else if (accel_dev->is_vf && pf) {
+ /* VF on host */
+ struct adf_accel_vf_info *vf_info;
+ struct vf_id_map *map;
+
+ vf_info = pf->pf.vf_info + adf_get_vf_id(accel_dev);
+
+ map = adf_find_vf(adf_get_vf_num(accel_dev));
+ if (map) {
+ struct vf_id_map *next;
+
+ accel_dev->accel_id = map->id;
+ list_add_tail(&accel_dev->list, &accel_table);
+ map->fake_id++;
+ map->attached = true;
+ next = list_next_entry(map, list);
+ while (next && &next->list != &vfs_table) {
+ next->fake_id++;
+ next = list_next_entry(next, list);
+ }
+
+ ret = 0;
+ goto unlock;
+ }
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ accel_dev->accel_id = num_devices++;
+ list_add_tail(&accel_dev->list, &accel_table);
+ map->bdf = adf_get_vf_num(accel_dev);
+ map->id = accel_dev->accel_id;
+ map->fake_id = map->id;
+ map->attached = true;
+ list_add_tail(&map->list, &vfs_table);
}
- atomic_set(&accel_dev->ref_count, 0);
- list_add_tail(&accel_dev->list, &accel_table);
- accel_dev->accel_id = num_devices++;
+unlock:
mutex_unlock(&table_lock);
- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(adf_devmgr_add_dev);
/**
* adf_devmgr_rm_dev() - Remove accel_dev from the acceleration framework.
* @accel_dev: Pointer to acceleration device.
+ * @pf: Corresponding PF if the accel_dev is a VF
*
* Function removes acceleration device from the acceleration framework.
* To be used by QAT device specific drivers.
*
* Return: void
*/
-void adf_devmgr_rm_dev(struct adf_accel_dev *accel_dev)
+void adf_devmgr_rm_dev(struct adf_accel_dev *accel_dev,
+ struct adf_accel_dev *pf)
{
mutex_lock(&table_lock);
+ if (!accel_dev->is_vf || (accel_dev->is_vf && !pf)) {
+ num_devices--;
+ } else if (accel_dev->is_vf && pf) {
+ struct vf_id_map *map, *next;
+
+ map = adf_find_vf(adf_get_vf_num(accel_dev));
+ if (!map) {
+ dev_err(&GET_DEV(accel_dev), "Failed to find VF map\n");
+ goto unlock;
+ }
+ map->fake_id--;
+ map->attached = false;
+ next = list_next_entry(map, list);
+ while (next && &next->list != &vfs_table) {
+ next->fake_id--;
+ next = list_next_entry(next, list);
+ }
+ }
+unlock:
list_del(&accel_dev->list);
- num_devices--;
mutex_unlock(&table_lock);
}
EXPORT_SYMBOL_GPL(adf_devmgr_rm_dev);
struct adf_accel_dev *adf_devmgr_get_dev_by_id(uint32_t id)
{
struct list_head *itr;
+ int real_id;
mutex_lock(&table_lock);
+ real_id = adf_get_vf_real_id(id);
+ if (real_id < 0)
+ goto unlock;
+
+ id = real_id;
+
list_for_each(itr, &accel_table) {
struct adf_accel_dev *ptr =
list_entry(itr, struct adf_accel_dev, list);
-
if (ptr->accel_id == id) {
mutex_unlock(&table_lock);
return ptr;
}
}
+unlock:
mutex_unlock(&table_lock);
return NULL;
}
return -ENODEV;
}
-void adf_devmgr_get_num_dev(uint32_t *num)
+static int adf_get_num_dettached_vfs(void)
{
struct list_head *itr;
+ int vfs = 0;
- *num = 0;
- list_for_each(itr, &accel_table) {
- (*num)++;
+ mutex_lock(&table_lock);
+ list_for_each(itr, &vfs_table) {
+ struct vf_id_map *ptr =
+ list_entry(itr, struct vf_id_map, list);
+ if (ptr->bdf != ~0 && !ptr->attached)
+ vfs++;
}
+ mutex_unlock(&table_lock);
+ return vfs;
+}
+
+void adf_devmgr_get_num_dev(uint32_t *num)
+{
+ *num = num_devices - adf_get_num_dettached_vfs();
}
+/**
+ * adf_dev_in_use() - Check whether accel_dev is currently in use
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 1 when device is in use, 0 otherwise.
+ */
int adf_dev_in_use(struct adf_accel_dev *accel_dev)
{
return atomic_read(&accel_dev->ref_count) != 0;
}
+EXPORT_SYMBOL_GPL(adf_dev_in_use);
+/**
+ * adf_dev_get() - Increment accel_dev reference count
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * Increment the accel_dev refcount and if this is the first time
+ * incrementing it during this period the accel_dev is in use,
+ * increment the module refcount too.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 0 when successful, EFAULT when fail to bump module refcount
+ */
int adf_dev_get(struct adf_accel_dev *accel_dev)
{
if (atomic_add_return(1, &accel_dev->ref_count) == 1)
return -EFAULT;
return 0;
}
+EXPORT_SYMBOL_GPL(adf_dev_get);
+/**
+ * adf_dev_put() - Decrement accel_dev reference count
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * Decrement the accel_dev refcount and if this is the last time
+ * decrementing it during this period the accel_dev is in use,
+ * decrement the module refcount too.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: void
+ */
void adf_dev_put(struct adf_accel_dev *accel_dev)
{
if (atomic_sub_return(1, &accel_dev->ref_count) == 0)
module_put(accel_dev->owner);
}
+EXPORT_SYMBOL_GPL(adf_dev_put);
+/**
+ * adf_devmgr_in_reset() - Check whether device is in reset
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 1 when the device is being reset, 0 otherwise.
+ */
int adf_devmgr_in_reset(struct adf_accel_dev *accel_dev)
{
return test_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
}
+EXPORT_SYMBOL_GPL(adf_devmgr_in_reset);
+/**
+ * adf_dev_started() - Check whether device has started
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 1 when the device has started, 0 otherwise
+ */
int adf_dev_started(struct adf_accel_dev *accel_dev)
{
return test_bit(ADF_STATUS_STARTED, &accel_dev->status);
}
+EXPORT_SYMBOL_GPL(adf_dev_started);
Code Review / kvmfornfv.git / blobdiff