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Staging: ipack: improve the register of a bus and a device in the bus.
It adds and removes some fields in the struct ipack_device and ipack_bus_device to make it cleaner. The API has change to group all the operations on these structures inside of the ipack driver. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Iglesias Gonsalvez
Greg Kroah-Hartman
parent
484ecc95d9
commit
ec440335b1
@ -407,53 +407,22 @@ static struct ipack_device *tpci200_slot_register(const char *board_name,
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goto err_unlock;
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}
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dev = kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
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if (dev == NULL) {
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pr_info("Slot [%s %d:%d] Unable to allocate memory for new slot !\n",
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TPCI200_SHORTNAME,
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tpci200_number, slot_position);
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goto err_unlock;
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}
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if (size > IPACK_BOARD_NAME_SIZE) {
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pr_warning("Slot [%s %d:%d] name (%s) too long (%d > %d). Will be truncated!\n",
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TPCI200_SHORTNAME, tpci200_number, slot_position,
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board_name, (int)strlen(board_name),
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IPACK_BOARD_NAME_SIZE);
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size = IPACK_BOARD_NAME_SIZE;
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}
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strncpy(dev->board_name, board_name, size-1);
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dev->board_name[size-1] = '\0';
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dev->bus_nr = tpci200->info->drv.bus_nr;
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dev->slot = slot_position;
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/*
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* Give the same IRQ number as the slot number.
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* The TPCI200 has assigned his own two IRQ by PCI bus driver
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*/
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dev->irq = slot_position;
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dev = ipack_device_register(tpci200->info->ipack_bus,
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slot_position, slot_position);
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if (dev == NULL) {
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pr_info("Slot [%d:%d] Unable to register an ipack device\n",
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tpci200_number, slot_position);
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goto err_unlock;
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}
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dev->id_space.address = NULL;
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dev->id_space.size = 0;
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dev->io_space.address = NULL;
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dev->io_space.size = 0;
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dev->mem_space.address = NULL;
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dev->mem_space.size = 0;
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/* Give the operations structure */
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dev->ops = &tpci200_bus_ops;
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tpci200->slots[slot_position].dev = dev;
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if (ipack_device_register(dev) < 0)
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goto err_unregister;
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mutex_unlock(&tpci200->mutex);
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return dev;
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err_unregister:
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tpci200_slot_unregister(dev);
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kfree(dev);
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err_unlock:
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mutex_unlock(&tpci200->mutex);
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return NULL;
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@ -874,7 +843,6 @@ static int tpci200_slot_unregister(struct ipack_device *dev)
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ipack_device_unregister(dev);
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tpci200->slots[dev->slot].dev = NULL;
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kfree(dev);
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mutex_unlock(&tpci200->mutex);
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return 0;
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@ -1116,20 +1084,20 @@ static int tpci200_pciprobe(struct pci_dev *pdev,
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return -ENODEV;
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}
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tpci200->info->drv.dev = &pdev->dev;
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tpci200->info->drv.slots = TPCI200_NB_SLOT;
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/* Register the bus in the industry pack driver */
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ret = ipack_bus_register(&tpci200->info->drv);
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if (ret < 0) {
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/* Register the carrier in the industry pack bus driver */
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tpci200->info->ipack_bus = ipack_bus_register(&pdev->dev,
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TPCI200_NB_SLOT,
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&tpci200_bus_ops);
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if (!tpci200->info->ipack_bus) {
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pr_err("error registering the carrier on ipack driver\n");
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tpci200_uninstall(tpci200);
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kfree(tpci200->info);
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kfree(tpci200);
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return -EFAULT;
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}
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/* save the bus number given by ipack to logging purpose */
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tpci200->number = tpci200->info->drv.bus_nr;
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tpci200->number = tpci200->info->ipack_bus->bus_nr;
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dev_set_drvdata(&pdev->dev, tpci200);
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/* add the registered device in an internal linked list */
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list_add_tail(&tpci200->list, &tpci200_list);
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@ -1141,7 +1109,8 @@ static void __tpci200_pci_remove(struct tpci200_board *tpci200)
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tpci200_uninstall(tpci200);
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tpci200_remove_sysfs_files(tpci200);
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list_del(&tpci200->list);
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ipack_bus_unregister(&tpci200->info->drv);
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ipack_bus_unregister(tpci200->info->ipack_bus);
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kfree(tpci200->info);
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kfree(tpci200);
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}
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@ -151,7 +151,7 @@ struct tpci200_infos {
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void __iomem *ioidint_space;
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void __iomem *mem8_space;
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spinlock_t access_lock;
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struct ipack_bus_device drv;
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struct ipack_bus_device *ipack_bus;
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};
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struct tpci200_board {
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struct list_head list;
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@ -73,7 +73,8 @@ static inline void ipoctal_write_io_reg(struct ipoctal *ipoctal,
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unsigned long offset;
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offset = ((void __iomem *) dest) - ipoctal->dev->io_space.address;
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ipoctal->dev->ops->write8(ipoctal->dev, IPACK_IO_SPACE, offset, value);
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ipoctal->dev->bus->ops->write8(ipoctal->dev, IPACK_IO_SPACE, offset,
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value);
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}
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static inline void ipoctal_write_cr_cmd(struct ipoctal *ipoctal,
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@ -90,7 +91,8 @@ static inline unsigned char ipoctal_read_io_reg(struct ipoctal *ipoctal,
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unsigned char value;
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offset = ((void __iomem *) src) - ipoctal->dev->io_space.address;
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ipoctal->dev->ops->read8(ipoctal->dev, IPACK_IO_SPACE, offset, &value);
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ipoctal->dev->bus->ops->read8(ipoctal->dev, IPACK_IO_SPACE, offset,
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&value);
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return value;
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}
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@ -341,12 +343,12 @@ static int ipoctal_check_model(struct ipack_device *dev, unsigned char *id)
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unsigned char manufacturerID;
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unsigned char board_id;
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dev->ops->read8(dev, IPACK_ID_SPACE,
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dev->bus->ops->read8(dev, IPACK_ID_SPACE,
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IPACK_IDPROM_OFFSET_MANUFACTURER_ID, &manufacturerID);
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if (manufacturerID != IP_OCTAL_MANUFACTURER_ID)
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return -ENODEV;
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dev->ops->read8(dev, IPACK_ID_SPACE,
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dev->bus->ops->read8(dev, IPACK_ID_SPACE,
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IPACK_IDPROM_OFFSET_MODEL, (unsigned char *)&board_id);
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switch (board_id) {
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@ -376,7 +378,8 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
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char name[20];
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unsigned char board_id;
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res = ipoctal->dev->ops->map_space(ipoctal->dev, 0, IPACK_ID_SPACE);
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res = ipoctal->dev->bus->ops->map_space(ipoctal->dev, 0,
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IPACK_ID_SPACE);
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if (res) {
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pr_err("Unable to map slot [%d:%d] ID space!\n", bus_nr, slot);
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return res;
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@ -384,18 +387,20 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
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res = ipoctal_check_model(ipoctal->dev, &board_id);
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if (res) {
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ipoctal->dev->ops->unmap_space(ipoctal->dev, IPACK_ID_SPACE);
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ipoctal->dev->bus->ops->unmap_space(ipoctal->dev,
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IPACK_ID_SPACE);
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goto out_unregister_id_space;
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}
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ipoctal->board_id = board_id;
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res = ipoctal->dev->ops->map_space(ipoctal->dev, 0, IPACK_IO_SPACE);
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res = ipoctal->dev->bus->ops->map_space(ipoctal->dev, 0,
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IPACK_IO_SPACE);
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if (res) {
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pr_err("Unable to map slot [%d:%d] IO space!\n", bus_nr, slot);
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goto out_unregister_id_space;
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}
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res = ipoctal->dev->ops->map_space(ipoctal->dev,
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res = ipoctal->dev->bus->ops->map_space(ipoctal->dev,
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0x8000, IPACK_MEM_SPACE);
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if (res) {
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pr_err("Unable to map slot [%d:%d] MEM space!\n", bus_nr, slot);
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@ -434,9 +439,9 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
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* Depending of the carrier these addresses are accesible or not.
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* More info in the datasheet.
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*/
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ipoctal->dev->ops->request_irq(ipoctal->dev, vector,
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ipoctal->dev->bus->ops->request_irq(ipoctal->dev, vector,
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ipoctal_irq_handler, ipoctal);
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ipoctal->dev->ops->write8(ipoctal->dev, IPACK_ID_SPACE, 0, vector);
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ipoctal->dev->bus->ops->write8(ipoctal->dev, IPACK_ID_SPACE, 0, vector);
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/* Register the TTY device */
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@ -502,11 +507,11 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
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return 0;
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out_unregister_slot_unmap:
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ipoctal->dev->ops->unmap_space(ipoctal->dev, IPACK_ID_SPACE);
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ipoctal->dev->bus->ops->unmap_space(ipoctal->dev, IPACK_ID_SPACE);
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out_unregister_io_space:
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ipoctal->dev->ops->unmap_space(ipoctal->dev, IPACK_IO_SPACE);
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ipoctal->dev->bus->ops->unmap_space(ipoctal->dev, IPACK_IO_SPACE);
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out_unregister_id_space:
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ipoctal->dev->ops->unmap_space(ipoctal->dev, IPACK_MEM_SPACE);
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ipoctal->dev->bus->ops->unmap_space(ipoctal->dev, IPACK_MEM_SPACE);
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return res;
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}
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@ -799,13 +804,20 @@ static int ipoctal_match(struct ipack_device *dev)
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int res;
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unsigned char board_id;
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res = dev->ops->map_space(dev, 0, IPACK_ID_SPACE);
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if ((!dev->bus->ops) || (!dev->bus->ops->map_space) ||
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(!dev->bus->ops->unmap_space))
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return 0;
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res = dev->bus->ops->map_space(dev, 0, IPACK_ID_SPACE);
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if (res)
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return res;
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return 0;
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res = ipoctal_check_model(dev, &board_id);
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dev->ops->unmap_space(dev, IPACK_ID_SPACE);
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return res;
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dev->bus->ops->unmap_space(dev, IPACK_ID_SPACE);
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if (!res)
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return 1;
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return 0;
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}
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static int ipoctal_probe(struct ipack_device *dev)
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@ -843,8 +855,8 @@ static void __ipoctal_remove(struct ipoctal *ipoctal)
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put_tty_driver(ipoctal->tty_drv);
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/* Tell the carrier board to free all the resources for this device */
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if (ipoctal->dev->ops->remove_device != NULL)
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ipoctal->dev->ops->remove_device(ipoctal->dev);
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if (ipoctal->dev->bus->ops->remove_device != NULL)
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ipoctal->dev->bus->ops->remove_device(ipoctal->dev);
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list_del(&ipoctal->list);
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kfree(ipoctal);
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@ -868,11 +880,8 @@ static struct ipack_driver_ops ipoctal_drv_ops = {
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static int __init ipoctal_init(void)
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{
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driver.owner = THIS_MODULE;
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driver.ops = &ipoctal_drv_ops;
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driver.driver.name = KBUILD_MODNAME;
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ipack_driver_register(&driver);
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return 0;
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return ipack_driver_register(&driver, THIS_MODULE, KBUILD_MODNAME);
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}
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static void __exit ipoctal_exit(void)
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@ -13,6 +13,7 @@
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include "ipack.h"
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#define to_ipack_dev(device) container_of(device, struct ipack_device, dev)
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@ -28,13 +29,19 @@ struct ipack_busmap {
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};
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static struct ipack_busmap busmap;
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static void ipack_device_release(struct device *dev)
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{
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struct ipack_device *device = to_ipack_dev(dev);
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kfree(device);
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}
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static int ipack_bus_match(struct device *device, struct device_driver *driver)
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{
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int ret;
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struct ipack_device *dev = to_ipack_dev(device);
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struct ipack_driver *drv = to_ipack_driver(driver);
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if (!drv->ops->match)
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if ((!drv->ops) || (!drv->ops->match))
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return -EINVAL;
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ret = drv->ops->match(dev);
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@ -92,16 +99,27 @@ error_find_busnum:
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return busnum;
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}
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int ipack_bus_register(struct ipack_bus_device *bus)
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struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
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struct ipack_bus_ops *ops)
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{
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int bus_nr;
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struct ipack_bus_device *bus;
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bus = kzalloc(sizeof(struct ipack_bus_device), GFP_KERNEL);
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if (!bus)
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return NULL;
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bus_nr = ipack_assign_bus_number();
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if (bus_nr < 0)
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return -1;
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if (bus_nr < 0) {
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kfree(bus);
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return NULL;
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}
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bus->bus_nr = bus_nr;
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return 0;
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bus->parent = parent;
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bus->slots = slots;
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bus->ops = ops;
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return bus;
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}
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EXPORT_SYMBOL_GPL(ipack_bus_register);
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@ -110,12 +128,16 @@ int ipack_bus_unregister(struct ipack_bus_device *bus)
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mutex_lock(&ipack_mutex);
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clear_bit(bus->bus_nr, busmap.busmap);
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mutex_unlock(&ipack_mutex);
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kfree(bus);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ipack_bus_unregister);
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int ipack_driver_register(struct ipack_driver *edrv)
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int ipack_driver_register(struct ipack_driver *edrv, struct module *owner,
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char *name)
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{
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edrv->driver.owner = owner;
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edrv->driver.name = name;
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edrv->driver.bus = &ipack_bus_type;
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return driver_register(&edrv->driver);
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}
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@ -127,26 +149,35 @@ void ipack_driver_unregister(struct ipack_driver *edrv)
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}
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EXPORT_SYMBOL_GPL(ipack_driver_unregister);
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static void ipack_device_release(struct device *dev)
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{
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}
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int ipack_device_register(struct ipack_device *dev)
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struct ipack_device *ipack_device_register(struct ipack_bus_device *bus,
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int slot, int irqv)
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{
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int ret;
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struct ipack_device *dev;
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dev = kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
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if (!dev)
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return NULL;
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dev->dev.bus = &ipack_bus_type;
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dev->dev.release = ipack_device_release;
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dev->dev.parent = bus->parent;
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dev->slot = slot;
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dev->bus_nr = bus->bus_nr;
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dev->irq = irqv;
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dev->bus = bus;
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dev_set_name(&dev->dev,
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"%s.%u.%u", dev->board_name, dev->bus_nr, dev->slot);
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"ipack-dev.%u.%u", dev->bus_nr, dev->slot);
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ret = device_register(&dev->dev);
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if (ret < 0) {
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pr_err("error registering the device.\n");
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dev->driver->ops->remove(dev);
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kfree(dev);
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return NULL;
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}
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return ret;
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return dev;
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}
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EXPORT_SYMBOL_GPL(ipack_device_register);
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@ -49,13 +49,11 @@ struct ipack_addr_space {
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/**
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* struct ipack_device
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*
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* @board_name: IP mezzanine board name
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* @bus_name: IP carrier board name
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* @bus_nr: IP bus number where the device is plugged
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* @slot: Slot where the device is plugged in the carrier board
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* @irq: IRQ vector
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* @driver: Pointer to the ipack_driver that manages the device
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* @ops: Carrier board operations to access the device
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* @bus: ipack_bus_device where the device is plugged to.
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* @id_space: Virtual address to ID space.
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* @io_space: Virtual address to IO space.
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* @mem_space: Virtual address to MEM space.
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@ -63,7 +61,7 @@ struct ipack_addr_space {
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*
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* Warning: Direct access to mapped memory is possible but the endianness
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* is not the same with PCI carrier or VME carrier. The endianness is managed
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* by the carrier board throught @ops.
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* by the carrier board throught bus->ops.
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*/
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struct ipack_device {
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char board_name[IPACK_BOARD_NAME_SIZE];
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@ -72,14 +70,14 @@ struct ipack_device {
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unsigned int slot;
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unsigned int irq;
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struct ipack_driver *driver;
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struct ipack_bus_ops *ops;
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struct ipack_bus_device *bus;
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struct ipack_addr_space id_space;
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struct ipack_addr_space io_space;
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struct ipack_addr_space mem_space;
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struct device dev;
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};
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/*
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/**
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||||
* struct ipack_driver_ops -- callbacks to mezzanine driver for installing/removing one device
|
||||
*
|
||||
* @match: Match function
|
||||
@ -94,36 +92,16 @@ struct ipack_driver_ops {
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipack_driver -- Specific data to each mezzanine board driver
|
||||
* struct ipack_driver -- Specific data to each ipack board driver
|
||||
*
|
||||
* @driver: Device driver kernel representation
|
||||
* @ops: Mezzanine driver operations specific for the ipack bus.
|
||||
*/
|
||||
struct ipack_driver {
|
||||
struct module *owner;
|
||||
struct device_driver driver;
|
||||
struct ipack_driver_ops *ops;
|
||||
};
|
||||
|
||||
/*
|
||||
* ipack_driver_register -- Register a new mezzanine driver
|
||||
*
|
||||
* Called by the mezzanine driver to register itself as a driver
|
||||
* that can manage ipack devices.
|
||||
*/
|
||||
|
||||
int ipack_driver_register(struct ipack_driver *edrv);
|
||||
void ipack_driver_unregister(struct ipack_driver *edrv);
|
||||
|
||||
/*
|
||||
* ipack_device_register -- register a new mezzanine device
|
||||
*
|
||||
* Register a new ipack device (mezzanine device). The call is done by
|
||||
* the carrier device driver.
|
||||
*/
|
||||
int ipack_device_register(struct ipack_device *dev);
|
||||
void ipack_device_unregister(struct ipack_device *dev);
|
||||
|
||||
/**
|
||||
* struct ipack_bus_ops - available operations on a bridge module
|
||||
*
|
||||
@ -159,24 +137,51 @@ struct ipack_bus_ops {
|
||||
* @dev: pointer to carrier device
|
||||
* @slots: number of slots available
|
||||
* @bus_nr: ipack bus number
|
||||
* @vector: IRQ base vector. IRQ vectors are $vector + $slot_number
|
||||
* @ops: bus operations for the mezzanine drivers
|
||||
*/
|
||||
struct ipack_bus_device {
|
||||
struct device *dev;
|
||||
struct device *parent;
|
||||
int slots;
|
||||
int bus_nr;
|
||||
int vector;
|
||||
struct ipack_bus_ops *ops;
|
||||
};
|
||||
|
||||
/**
|
||||
* ipack_bus_register -- register a new ipack bus
|
||||
*
|
||||
* The carrier board device driver should call this function to register itself
|
||||
* as available bus in ipack.
|
||||
* @parent: pointer to the parent device, if any.
|
||||
* @slots: number of slots available in the bus device.
|
||||
* @ops: bus operations for the mezzanine drivers.
|
||||
*
|
||||
* The carrier board device should call this function to register itself as
|
||||
* available bus device in ipack.
|
||||
*/
|
||||
int ipack_bus_register(struct ipack_bus_device *bus);
|
||||
struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
|
||||
struct ipack_bus_ops *ops);
|
||||
|
||||
/**
|
||||
* ipack_bus_unregister -- unregister an ipack bus
|
||||
*/
|
||||
int ipack_bus_unregister(struct ipack_bus_device *bus);
|
||||
|
||||
/**
|
||||
* ipack_driver_register -- Register a new driver
|
||||
*
|
||||
* Called by a ipack driver to register itself as a driver
|
||||
* that can manage ipack devices.
|
||||
*/
|
||||
int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, char *name);
|
||||
void ipack_driver_unregister(struct ipack_driver *edrv);
|
||||
|
||||
/**
|
||||
* ipack_device_register -- register a new mezzanine device
|
||||
*
|
||||
* @bus: ipack bus device it is plugged to.
|
||||
* @slot: slot position in the bus device.
|
||||
* @irqv: IRQ vector for the mezzanine.
|
||||
*
|
||||
* Register a new ipack device (mezzanine device). The call is done by
|
||||
* the carrier device driver.
|
||||
*/
|
||||
struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, int slot, int irqv);
|
||||
void ipack_device_unregister(struct ipack_device *dev);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user