X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fcrypto%2Fqat%2Fqat_common%2Fadf_dev_mgr.c;fp=kernel%2Fdrivers%2Fcrypto%2Fqat%2Fqat_common%2Fadf_dev_mgr.c;h=8dfdb8f907973359bb3bd4da893d94f46540cd7c;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=3f0ff9e7d84060918b55321b09be752533e166e2;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/drivers/crypto/qat/qat_common/adf_dev_mgr.c b/kernel/drivers/crypto/qat/qat_common/adf_dev_mgr.c
index 3f0ff9e7d..8dfdb8f90 100644
--- a/kernel/drivers/crypto/qat/qat_common/adf_dev_mgr.c
+++ b/kernel/drivers/crypto/qat/qat_common/adf_dev_mgr.c
@@ -50,21 +50,125 @@
 #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",
@@ -73,20 +177,77 @@ int adf_devmgr_add_dev(struct adf_accel_dev *accel_dev)
 	}
 
 	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);
 
@@ -98,17 +259,37 @@ struct list_head *adf_devmgr_get_head(void)
 /**
  * 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);
@@ -154,17 +335,24 @@ EXPORT_SYMBOL_GPL(adf_devmgr_pci_to_accel_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;
 }
@@ -180,21 +368,52 @@ int adf_devmgr_verify_id(uint32_t id)
 	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)
@@ -202,19 +421,50 @@ int adf_dev_get(struct adf_accel_dev *accel_dev)
 			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);