/* Kernel-internal device class. */
struct class *class;
- /* PCI subsystem metadata associated with this driver. */
- struct pci_driver pci;
-
/* Instantiated / present devices of this type. */
struct gasket_dev *devs[GASKET_DEV_MAX];
};
}
/*
- * Setup PCI & set up memory mapping for the specified device.
+ * Setup PCI memory mapping for the specified device.
*
- * Enables the PCI device, reads the BAR registers and sets up pointers to the
- * device's memory mapped IO space.
+ * Reads the BAR registers and sets up pointers to the device's memory mapped
+ * IO space.
*
* Returns 0 on success and a negative value otherwise.
*/
{
int i, mapped_bars, ret;
- ret = pci_enable_device(pci_dev);
- if (ret) {
- dev_err(gasket_dev->dev, "cannot enable PCI device\n");
- return ret;
- }
-
- pci_set_master(pci_dev);
-
for (i = 0; i < GASKET_NUM_BARS; i++) {
ret = gasket_map_pci_bar(gasket_dev, i);
if (ret) {
for (i = 0; i < mapped_bars; i++)
gasket_unmap_pci_bar(gasket_dev, i);
- pci_disable_device(pci_dev);
return -ENOMEM;
}
-/* Unmaps memory and cleans up PCI for the specified device. */
+/* Unmaps memory for the specified device. */
static void gasket_cleanup_pci(struct gasket_dev *gasket_dev)
{
int i;
for (i = 0; i < GASKET_NUM_BARS; i++)
gasket_unmap_pci_bar(gasket_dev, i);
-
- pci_disable_device(gasket_dev->pci_dev);
}
/* Determine the health of the Gasket device. */
}
/*
- * PCI subsystem probe function.
- *
- * Called when a Gasket device is found. Allocates device metadata, maps device
- * memory, and calls gasket_enable_dev to prepare the device for active use.
+ * Add PCI gasket device.
*
- * Returns 0 if successful and a negative value otherwise.
+ * Called by Gasket device probe function.
+ * Allocates device metadata, maps device memory, and calls gasket_enable_dev
+ * to prepare the device for active use.
*/
-static int gasket_pci_probe(struct pci_dev *pci_dev,
- const struct pci_device_id *id)
+int gasket_pci_add_device(struct pci_dev *pci_dev,
+ struct gasket_dev **gasket_devp)
{
int ret;
const char *kobj_name = dev_name(&pci_dev->dev);
const struct gasket_driver_desc *driver_desc;
struct device *parent;
- pr_info("Add Gasket device %s\n", kobj_name);
+ pr_debug("add PCI device %s\n", kobj_name);
mutex_lock(&g_mutex);
internal_desc = lookup_internal_desc(pci_dev);
mutex_unlock(&g_mutex);
if (!internal_desc) {
- pr_err("PCI probe called for unknown driver type\n");
+ dev_err(&pci_dev->dev,
+ "PCI add device called for unknown driver type\n");
return -ENODEV;
}
goto fail5;
}
+ *gasket_devp = gasket_dev;
return 0;
fail5:
gasket_free_dev(gasket_dev);
return ret;
}
+EXPORT_SYMBOL(gasket_pci_add_device);
-/*
- * PCI subsystem remove function.
- *
- * Called to remove a Gasket device. Finds the device in the device list and
- * cleans up metadata.
- */
-static void gasket_pci_remove(struct pci_dev *pci_dev)
+/* Remove a PCI gasket device. */
+void gasket_pci_remove_device(struct pci_dev *pci_dev)
{
int i;
struct gasket_internal_desc *internal_desc;
if (!gasket_dev)
return;
- pr_info("remove %s device %s\n", internal_desc->driver_desc->name,
- gasket_dev->kobj_name);
+ dev_dbg(gasket_dev->dev, "remove %s PCI gasket device\n",
+ internal_desc->driver_desc->name);
gasket_disable_dev(gasket_dev);
gasket_cleanup_pci(gasket_dev);
device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
gasket_free_dev(gasket_dev);
}
+EXPORT_SYMBOL(gasket_pci_remove_device);
/**
* Lookup a name by number in a num_name table.
internal = &g_descs[desc_idx];
mutex_init(&internal->mutex);
memset(internal->devs, 0, sizeof(struct gasket_dev *) * GASKET_DEV_MAX);
- memset(&internal->pci, 0, sizeof(internal->pci));
- internal->pci.name = driver_desc->name;
- internal->pci.id_table = driver_desc->pci_id_table;
- internal->pci.probe = gasket_pci_probe;
- internal->pci.remove = gasket_pci_remove;
internal->class =
class_create(driver_desc->module, driver_desc->name);
goto unregister_gasket_driver;
}
- /*
- * Not using pci_register_driver() (without underscores), as it
- * depends on KBUILD_MODNAME, and this is a shared file.
- */
- ret = __pci_register_driver(&internal->pci, driver_desc->module,
- driver_desc->name);
- if (ret) {
- pr_err("cannot register %s pci driver [ret=%d]\n",
- driver_desc->name, ret);
- goto fail1;
- }
-
ret = register_chrdev_region(MKDEV(driver_desc->major,
driver_desc->minor), GASKET_DEV_MAX,
driver_desc->name);
if (ret) {
pr_err("cannot register %s char driver [ret=%d]\n",
driver_desc->name, ret);
- goto fail2;
+ goto destroy_class;
}
return 0;
-fail2:
- pci_unregister_driver(&internal->pci);
-
-fail1:
+destroy_class:
class_destroy(internal->class);
unregister_gasket_driver:
unregister_chrdev_region(MKDEV(driver_desc->major, driver_desc->minor),
GASKET_DEV_MAX);
- pci_unregister_driver(&internal_desc->pci);
-
class_destroy(internal_desc->class);
/* Finally, effectively "remove" the driver. */