mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
81ad1837b5
This avoids allocating DMA buffers if not needed but at the moment is mostly just a neatness item. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*
|
|
* pata_netcell.c - Netcell PATA driver
|
|
*
|
|
* (c) 2006 Red Hat <alan@redhat.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <linux/libata.h>
|
|
#include <linux/ata.h>
|
|
|
|
#define DRV_NAME "pata_netcell"
|
|
#define DRV_VERSION "0.1.7"
|
|
|
|
/* No PIO or DMA methods needed for this device */
|
|
|
|
static struct scsi_host_template netcell_sht = {
|
|
.module = THIS_MODULE,
|
|
.name = DRV_NAME,
|
|
.ioctl = ata_scsi_ioctl,
|
|
.queuecommand = ata_scsi_queuecmd,
|
|
.can_queue = ATA_DEF_QUEUE,
|
|
.this_id = ATA_SHT_THIS_ID,
|
|
.sg_tablesize = LIBATA_MAX_PRD,
|
|
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
|
|
.emulated = ATA_SHT_EMULATED,
|
|
.use_clustering = ATA_SHT_USE_CLUSTERING,
|
|
.proc_name = DRV_NAME,
|
|
.dma_boundary = ATA_DMA_BOUNDARY,
|
|
.slave_configure = ata_scsi_slave_config,
|
|
.slave_destroy = ata_scsi_slave_destroy,
|
|
/* Use standard CHS mapping rules */
|
|
.bios_param = ata_std_bios_param,
|
|
};
|
|
|
|
static const struct ata_port_operations netcell_ops = {
|
|
/* Task file is PCI ATA format, use helpers */
|
|
.tf_load = ata_tf_load,
|
|
.tf_read = ata_tf_read,
|
|
.check_status = ata_check_status,
|
|
.exec_command = ata_exec_command,
|
|
.dev_select = ata_std_dev_select,
|
|
|
|
.freeze = ata_bmdma_freeze,
|
|
.thaw = ata_bmdma_thaw,
|
|
.error_handler = ata_bmdma_error_handler,
|
|
.post_internal_cmd = ata_bmdma_post_internal_cmd,
|
|
.cable_detect = ata_cable_80wire,
|
|
|
|
/* BMDMA handling is PCI ATA format, use helpers */
|
|
.bmdma_setup = ata_bmdma_setup,
|
|
.bmdma_start = ata_bmdma_start,
|
|
.bmdma_stop = ata_bmdma_stop,
|
|
.bmdma_status = ata_bmdma_status,
|
|
.qc_prep = ata_qc_prep,
|
|
.qc_issue = ata_qc_issue_prot,
|
|
.data_xfer = ata_data_xfer,
|
|
|
|
/* IRQ-related hooks */
|
|
.irq_handler = ata_interrupt,
|
|
.irq_clear = ata_bmdma_irq_clear,
|
|
.irq_on = ata_irq_on,
|
|
|
|
/* Generic PATA PCI ATA helpers */
|
|
.port_start = ata_sff_port_start,
|
|
};
|
|
|
|
|
|
/**
|
|
* netcell_init_one - Register Netcell ATA PCI device with kernel services
|
|
* @pdev: PCI device to register
|
|
* @ent: Entry in netcell_pci_tbl matching with @pdev
|
|
*
|
|
* Called from kernel PCI layer.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from PCI layer (may sleep).
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, or -ERRNO value.
|
|
*/
|
|
|
|
static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
static int printed_version;
|
|
static const struct ata_port_info info = {
|
|
.sht = &netcell_sht,
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
/* Actually we don't really care about these as the
|
|
firmware deals with it */
|
|
.pio_mask = 0x1f, /* pio0-4 */
|
|
.mwdma_mask = 0x07, /* mwdma0-2 */
|
|
.udma_mask = ATA_UDMA5, /* UDMA 133 */
|
|
.port_ops = &netcell_ops,
|
|
};
|
|
const struct ata_port_info *port_info[] = { &info, NULL };
|
|
|
|
if (!printed_version++)
|
|
dev_printk(KERN_DEBUG, &pdev->dev,
|
|
"version " DRV_VERSION "\n");
|
|
|
|
/* Any chip specific setup/optimisation/messages here */
|
|
ata_pci_clear_simplex(pdev);
|
|
|
|
/* And let the library code do the work */
|
|
return ata_pci_init_one(pdev, port_info);
|
|
}
|
|
|
|
static const struct pci_device_id netcell_pci_tbl[] = {
|
|
{ PCI_VDEVICE(NETCELL, PCI_DEVICE_ID_REVOLUTION), },
|
|
|
|
{ } /* terminate list */
|
|
};
|
|
|
|
static struct pci_driver netcell_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = netcell_pci_tbl,
|
|
.probe = netcell_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = ata_pci_device_resume,
|
|
#endif
|
|
};
|
|
|
|
static int __init netcell_init(void)
|
|
{
|
|
return pci_register_driver(&netcell_pci_driver);
|
|
}
|
|
|
|
static void __exit netcell_exit(void)
|
|
{
|
|
pci_unregister_driver(&netcell_pci_driver);
|
|
}
|
|
|
|
module_init(netcell_init);
|
|
module_exit(netcell_exit);
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("SCSI low-level driver for Netcell PATA RAID");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, netcell_pci_tbl);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|