[dpdk-dev] [PATCH] eventdev: remove PCI dependency

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

Remove the PCI dependency from generic data structures
and moved the PCI specific code to rte_event_pmd_pci*

CC: Gaetan Rivet <gaetan.rivet@6wind.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
 drivers/event/skeleton/skeleton_eventdev.c | 30 +++++++++-----
 lib/librte_eventdev/rte_eventdev.c         | 37 +++++++-----------
 lib/librte_eventdev/rte_eventdev.h         |  2 -
 lib/librte_eventdev/rte_eventdev_pmd.h     | 63 ++++--------------------------
 4 files changed, 41 insertions(+), 91 deletions(-)

diff --git a/drivers/event/skeleton/skeleton_eventdev.c b/drivers/event/skeleton/skeleton_eventdev.c
index 800bd76e0..34684aba0 100644
--- a/drivers/event/skeleton/skeleton_eventdev.c
+++ b/drivers/event/skeleton/skeleton_eventdev.c
@@ -427,18 +427,28 @@ static const struct rte_pci_id pci_id_skeleton_map[] = {
 	},
 };
 
-static struct rte_eventdev_driver pci_eventdev_skeleton_pmd = {
-	.pci_drv = {
-		.id_table = pci_id_skeleton_map,
-		.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
-		.probe = rte_event_pmd_pci_probe,
-		.remove = rte_event_pmd_pci_remove,
-	},
-	.eventdev_init = skeleton_eventdev_init,
-	.dev_private_size = sizeof(struct skeleton_eventdev),
+static int
+event_skeleton_pci_probe(struct rte_pci_driver *pci_drv,
+			 struct rte_pci_device *pci_dev)
+{
+	return rte_event_pmd_pci_probe(pci_drv, pci_dev,
+		sizeof(struct skeleton_eventdev), skeleton_eventdev_init);
+}
+
+static int
+event_skeleton_pci_remove(struct rte_pci_device *pci_dev)
+{
+	return rte_event_pmd_pci_remove(pci_dev, NULL);
+}
+
+static struct rte_pci_driver pci_eventdev_skeleton_pmd = {
+	.id_table = pci_id_skeleton_map,
+	.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
+	.probe = event_skeleton_pci_probe,
+	.remove = event_skeleton_pci_remove,
 };
 
-RTE_PMD_REGISTER_PCI(event_skeleton_pci, pci_eventdev_skeleton_pmd.pci_drv);
+RTE_PMD_REGISTER_PCI(event_skeleton_pci, pci_eventdev_skeleton_pmd);
 RTE_PMD_REGISTER_PCI_TABLE(event_skeleton_pci, pci_id_skeleton_map);
 
 /* VDEV based event device */
diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c
index 20afc3f0e..91f950666 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -126,8 +126,6 @@ rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info)
 	dev_info->dequeue_timeout_ns = dev->data->dev_conf.dequeue_timeout_ns;
 
 	dev_info->dev = dev->dev;
-	if (dev->driver)
-		dev_info->driver_name = dev->driver->pci_drv.driver.name;
 	return 0;
 }
 
@@ -1250,18 +1248,18 @@ rte_event_pmd_vdev_uninit(const char *name)
 
 int
 rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
-			struct rte_pci_device *pci_dev)
+			struct rte_pci_device *pci_dev,
+			size_t private_data_size,
+			eventdev_pmd_pci_callback_t devinit)
 {
-	struct rte_eventdev_driver *eventdrv;
 	struct rte_eventdev *eventdev;
 
 	char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
 
 	int retval;
 
-	eventdrv = (struct rte_eventdev_driver *)pci_drv;
-	if (eventdrv == NULL)
-		return -ENODEV;
+	if (devinit == NULL)
+		return -EINVAL;
 
 	rte_pci_device_name(&pci_dev->addr, eventdev_name,
 			sizeof(eventdev_name));
@@ -1275,7 +1273,7 @@ rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
 		eventdev->data->dev_private =
 				rte_zmalloc_socket(
 						"eventdev private structure",
-						eventdrv->dev_private_size,
+						private_data_size,
 						RTE_CACHE_LINE_SIZE,
 						rte_socket_id());
 
@@ -1285,10 +1283,9 @@ rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
 	}
 
 	eventdev->dev = &pci_dev->device;
-	eventdev->driver = eventdrv;
 
 	/* Invoke PMD device initialization function */
-	retval = (*eventdrv->eventdev_init)(eventdev);
+	retval = devinit(eventdev);
 	if (retval == 0)
 		return 0;
 
@@ -1307,12 +1304,12 @@ rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
 }
 
 int
-rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev)
+rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
+			 eventdev_pmd_pci_callback_t devuninit)
 {
-	const struct rte_eventdev_driver *eventdrv;
 	struct rte_eventdev *eventdev;
 	char eventdev_name[RTE_EVENTDEV_NAME_MAX_LEN];
-	int ret;
+	int ret = 0;
 
 	if (pci_dev == NULL)
 		return -EINVAL;
@@ -1324,22 +1321,16 @@ rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev)
 	if (eventdev == NULL)
 		return -ENODEV;
 
-	eventdrv = (const struct rte_eventdev_driver *)pci_dev->driver;
-	if (eventdrv == NULL)
-		return -ENODEV;
-
 	/* Invoke PMD device un-init function */
-	if (*eventdrv->eventdev_uninit) {
-		ret = (*eventdrv->eventdev_uninit)(eventdev);
-		if (ret)
-			return ret;
-	}
+	if (devuninit)
+		ret = devuninit(eventdev);
+	if (ret)
+		return ret;
 
 	/* Free event device */
 	rte_event_pmd_release(eventdev);
 
 	eventdev->dev = NULL;
-	eventdev->driver = NULL;
 
 	return 0;
 }
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index 20e7293e0..c5b2b7453 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -1063,8 +1063,6 @@ struct rte_eventdev {
 	/**< Functions exported by PMD */
 	struct rte_device *dev;
 	/**< Device info. supplied by probing */
-	const struct rte_eventdev_driver *driver;
-	/**< Driver for this device */
 
 	RTE_STD_C11
 	uint8_t attached : 1;
diff --git a/lib/librte_eventdev/rte_eventdev_pmd.h b/lib/librte_eventdev/rte_eventdev_pmd.h
index 4005b3c98..faa6989b4 100644
--- a/lib/librte_eventdev/rte_eventdev_pmd.h
+++ b/lib/librte_eventdev/rte_eventdev_pmd.h
@@ -87,60 +87,6 @@ extern "C" {
 #define RTE_EVENTDEV_DETACHED  (0)
 #define RTE_EVENTDEV_ATTACHED  (1)
 
-/**
- * Initialisation function of a event driver invoked for each matching
- * event PCI device detected during the PCI probing phase.
- *
- * @param dev
- *   The dev pointer is the address of the *rte_eventdev* structure associated
- *   with the matching device and which has been [automatically] allocated in
- *   the *rte_event_devices* array.
- *
- * @return
- *   - 0: Success, the device is properly initialised by the driver.
- *        In particular, the driver MUST have set up the *dev_ops* pointer
- *        of the *dev* structure.
- *   - <0: Error code of the device initialisation failure.
- */
-typedef int (*eventdev_init_t)(struct rte_eventdev *dev);
-
-/**
- * Finalisation function of a driver invoked for each matching
- * PCI device detected during the PCI closing phase.
- *
- * @param dev
- *   The dev pointer is the address of the *rte_eventdev* structure associated
- *   with the matching device and which	has been [automatically] allocated in
- *   the *rte_event_devices* array.
- *
- * @return
- *   - 0: Success, the device is properly finalised by the driver.
- *        In particular, the driver MUST free the *dev_ops* pointer
- *        of the *dev* structure.
- *   - <0: Error code of the device initialisation failure.
- */
-typedef int (*eventdev_uninit_t)(struct rte_eventdev *dev);
-
-/**
- * The structure associated with a PMD driver.
- *
- * Each driver acts as a PCI driver and is represented by a generic
- * *event_driver* structure that holds:
- *
- * - An *rte_pci_driver* structure (which must be the first field).
- *
- * - The *eventdev_init* function invoked for each matching PCI device.
- *
- * - The size of the private data to allocate for each matching device.
- */
-struct rte_eventdev_driver {
-	struct rte_pci_driver pci_drv;	/**< The PMD is also a PCI driver. */
-	unsigned int dev_private_size;	/**< Size of device private data. */
-
-	eventdev_init_t eventdev_init;	/**< Device init function. */
-	eventdev_uninit_t eventdev_uninit; /**< Device uninit function. */
-};
-
 /** Global structure used for maintaining state of allocated event devices */
 struct rte_eventdev_global {
 	uint8_t nb_devs;	/**< Number of devices found */
@@ -579,18 +525,23 @@ rte_event_pmd_vdev_init(const char *name, size_t dev_private_size,
 int
 rte_event_pmd_vdev_uninit(const char *name);
 
+typedef int (*eventdev_pmd_pci_callback_t)(struct rte_eventdev *dev);
+
 /**
  * Wrapper for use by pci drivers as a .probe function to attach to a event
  * interface.
  */
 int rte_event_pmd_pci_probe(struct rte_pci_driver *pci_drv,
-			    struct rte_pci_device *pci_dev);
+			    struct rte_pci_device *pci_dev,
+			    size_t private_data_size,
+			    eventdev_pmd_pci_callback_t devinit);
 
 /**
  * Wrapper for use by pci drivers as a .remove function to detach a event
  * interface.
  */
-int rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev);
+int rte_event_pmd_pci_remove(struct rte_pci_device *pci_dev,
+			     eventdev_pmd_pci_callback_t devuninit);
 
 #ifdef __cplusplus
 }
-- 
2.13.0