linit.c
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上传日期:2013-04-10
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- /*
- * Adaptec AAC series RAID controller driver
- * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
- *
- * based on the old aacraid driver that is..
- * Adaptec aacraid device driver for Linux.
- *
- * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Module Name:
- * linit.c
- *
- * Abstract: Linux Driver entry module for Adaptec RAID Array Controller
- *
- * Provides the following driver entry points:
- * aac_detect()
- * aac_release()
- * aac_queuecommand()
- * aac_resetcommand()
- * aac_biosparm()
- *
- */
- #define AAC_DRIVER_VERSION "0.9.9ac6-TEST"
- #define AAC_DRIVER_BUILD_DATE __DATE__
- #include <linux/module.h>
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/types.h>
- #include <linux/sched.h>
- #include <linux/pci.h>
- #include <linux/spinlock.h>
- #include <linux/slab.h>
- #include <linux/completion.h>
- #include <asm/semaphore.h>
- #include <linux/blk.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "aacraid.h"
- #include "sd.h"
- #define AAC_DRIVERNAME "aacraid"
- MODULE_AUTHOR("Red Hat Inc and Adaptec");
- MODULE_DESCRIPTION("Supports Dell PERC2, 2/Si, 3/Si, 3/Di, Adaptec 2120S, 2200S, 5400S, and HP NetRAID-4M devices. http://domsch.com/linux/ or http://linux.adaptec.com");
- MODULE_LICENSE("GPL");
- MODULE_PARM(nondasd, "i");
- MODULE_PARM_DESC(nondasd, "Control scanning of hba for nondasd devices. 0=off, 1=on");
- static int nondasd=-1;
- struct aac_dev *aac_devices[MAXIMUM_NUM_ADAPTERS];
- static unsigned aac_count = 0;
- static int aac_cfg_major = -1;
- /*
- * Because of the way Linux names scsi devices, the order in this table has
- * become important. Check for on-board Raid first, add-in cards second.
- *
- * dmb - For now we add the number of channels to this structure.
- * In the future we should add a fib that reports the number of channels
- * for the card. At that time we can remove the channels from here
- */
-
- static struct aac_driver_ident aac_drivers[] = {
- { 0x1028, 0x0001, 0x1028, 0x0001, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 2/Si */
- { 0x1028, 0x0002, 0x1028, 0x0002, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x1028, 0x0003, 0x1028, 0x0003, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Si */
- { 0x1028, 0x0004, 0x1028, 0x00d0, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Si */
- { 0x1028, 0x0002, 0x1028, 0x00d1, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x1028, 0x0002, 0x1028, 0x00d9, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x1028, 0x000a, 0x1028, 0x0106, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x1028, 0x000a, 0x1028, 0x011b, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x1028, 0x000a, 0x1028, 0x0121, aac_rx_init, "percraid", "DELL ", "PERCRAID ", 2 }, /* PERC 3/Di */
- { 0x9005, 0x0283, 0x9005, 0x0283, aac_rx_init, "aacraid", "ADAPTEC ", "catapult ", 2 }, /* catapult*/
- { 0x9005, 0x0284, 0x9005, 0x0284, aac_rx_init, "aacraid", "ADAPTEC ", "tomcat ", 2 }, /* tomcat*/
- { 0x9005, 0x0285, 0x9005, 0x0286, aac_rx_init, "aacraid", "ADAPTEC ", "Adaptec 2120S ", 1 }, /* Adaptec 2120S (Crusader)*/
- { 0x9005, 0x0285, 0x9005, 0x0285, aac_rx_init, "aacraid", "ADAPTEC ", "Adaptec 2200S ", 2 }, /* Adaptec 2200S (Vulcan)*/
- { 0x9005, 0x0285, 0x9005, 0x0287, aac_rx_init, "aacraid", "ADAPTEC ", "Adaptec 2200S ", 2 }, /* Adaptec 2200S (Vulcan-2m)*/
- { 0x1011, 0x0046, 0x9005, 0x0365, aac_sa_init, "aacraid", "ADAPTEC ", "Adaptec 5400S ", 4 }, /* Adaptec 5400S (Mustang)*/
- { 0x1011, 0x0046, 0x9005, 0x0364, aac_sa_init, "aacraid", "ADAPTEC ", "AAC-364 ", 4 }, /* Adaptec 5400S (Mustang)*/
- { 0x1011, 0x0046, 0x9005, 0x1364, aac_sa_init, "percraid", "DELL ", "PERCRAID ", 4 }, /* Dell PERC2 "Quad Channel" */
- { 0x1011, 0x0046, 0x103c, 0x10c2, aac_sa_init, "hpnraid", "HP ", "NetRAID-4M ", 4 } /* HP NetRAID-4M */
- };
- #define NUM_AACTYPES (sizeof(aac_drivers) / sizeof(struct aac_driver_ident))
- static int num_aacdrivers = NUM_AACTYPES;
- static int aac_cfg_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg);
- static int aac_cfg_open(struct inode * inode, struct file * file);
- static int aac_cfg_release(struct inode * inode,struct file * file);
- static struct file_operations aac_cfg_fops = {
- owner: THIS_MODULE,
- ioctl: aac_cfg_ioctl,
- open: aac_cfg_open,
- release: aac_cfg_release
- };
- static int aac_detect(Scsi_Host_Template *);
- static int aac_release(struct Scsi_Host *);
- static int aac_queuecommand(Scsi_Cmnd *, void (*CompletionRoutine)(Scsi_Cmnd *));
- static int aac_biosparm(Scsi_Disk *, kdev_t, int *);
- static int aac_procinfo(char *, char **, off_t, int, int, int);
- static int aac_ioctl(Scsi_Device *, int, void *);
- static int aac_eh_abort(Scsi_Cmnd * cmd);
- static int aac_eh_device_reset(Scsi_Cmnd* cmd);
- static int aac_eh_bus_reset(Scsi_Cmnd* cmd);
- static int aac_eh_reset(Scsi_Cmnd* cmd);
- static void aac_queuedepth(struct Scsi_Host *, Scsi_Device *);
- /**
- * aac_detect - Probe for aacraid cards
- * @template: SCSI driver template
- *
- * Probe for AAC Host Adapters initialize, register, and report the
- * configuration of each AAC Host Adapter found.
- * Returns the number of adapters successfully initialized and
- * registered.
- * Initializes all data necessary for this particular SCSI driver.
- * Notes:
- * The detect routine must not call any of the mid level functions
- * to queue commands because things are not guaranteed to be set
- * up yet. The detect routine can send commands to the host adapter
- * as long as the program control will not be passed to scsi.c in
- * the processing of the command. Note especially that
- * scsi_malloc/scsi_free must not be called.
- *
- */
-
- static int aac_detect(Scsi_Host_Template *template)
- {
- int index;
- int container;
- u16 vendor_id, device_id;
- struct Scsi_Host *host_ptr;
- struct pci_dev *dev = NULL;
- struct aac_dev *aac;
- struct fsa_scsi_hba *fsa_dev_ptr;
- char *name = NULL;
-
- printk(KERN_INFO "Red Hat/Adaptec aacraid driver, %sn", AAC_DRIVER_BUILD_DATE);
- /* setting up the proc directory structure */
- template->proc_name = "aacraid";
- for( index = 0; index != num_aacdrivers; index++ )
- {
- device_id = aac_drivers[index].device;
- vendor_id = aac_drivers[index].vendor;
- name = aac_drivers[index].name;
- dprintk((KERN_DEBUG "Checking %s %x/%x/%x/%x.n",
- name, vendor_id, device_id,
- aac_drivers[index].subsystem_vendor,
- aac_drivers[index].subsystem_device));
- dev = NULL;
- while((dev = pci_find_device(vendor_id, device_id, dev))) {
- if (pci_enable_device(dev))
- continue;
- pci_set_master(dev);
- pci_set_dma_mask(dev, 0xFFFFFFFFULL);
- if((dev->subsystem_vendor != aac_drivers[index].subsystem_vendor) ||
- (dev->subsystem_device != aac_drivers[index].subsystem_device))
- continue;
- dprintk((KERN_DEBUG "%s device detected.n", name));
- dprintk((KERN_DEBUG "%x/%x/%x/%x.n", vendor_id, device_id,
- aac_drivers[index].subsystem_vendor, aac_drivers[index].subsystem_device));
- /* Increment the host adapter count */
- aac_count++;
- /*
- * scsi_register() allocates memory for a Scsi_Hosts structure and
- * links it into the linked list of host adapters. This linked list
- * contains the data for all possible <supported> scsi hosts.
- * This is similar to the Scsi_Host_Template, except that we have
- * one entry for each actual physical host adapter on the system,
- * stored as a linked list. If there are two AAC boards, then we
- * will need to make two Scsi_Host entries, but there will be only
- * one Scsi_Host_Template entry. The second argument to scsi_register()
- * specifies the size of the extra memory we want to hold any device
- * specific information.
- */
- host_ptr = scsi_register( template, sizeof(struct aac_dev) );
- /*
- * These three parameters can be used to allow for wide SCSI
- * and for host adapters that support multiple buses.
- */
- host_ptr->max_id = 17;
- host_ptr->max_lun = 8;
- host_ptr->max_channel = 1;
- host_ptr->irq = dev->irq; /* Adapter IRQ number */
- /* host_ptr->base = ( char * )(dev->resource[0].start & ~0xff); */
- host_ptr->base = dev->resource[0].start;
- scsi_set_pci_device(host_ptr, dev);
- dprintk((KERN_DEBUG "Device base address = 0x%lx [0x%lx].n", host_ptr->base, dev->resource[0].start));
- dprintk((KERN_DEBUG "Device irq = 0x%x.n", dev->irq));
- /*
- * The unique_id field is a unique identifier that must
- * be assigned so that we have some way of identifying
- * each host adapter properly and uniquely. For hosts
- * that do not support more than one card in the
- * system, this does not need to be set. It is
- * initialized to zero in scsi_register(). This is the
- * value returned as aac->id.
- */
- host_ptr->unique_id = aac_count - 1;
- /*
- * This function is called after the device list has
- * been built to find the tagged queueing depth
- * supported for each device.
- */
- host_ptr->select_queue_depths = aac_queuedepth;
- aac = (struct aac_dev *)host_ptr->hostdata;
- /* attach a pointer back to Scsi_Host */
- aac->scsi_host_ptr = host_ptr;
- aac->pdev = dev;
- aac->cardtype = index;
- aac->name = aac->scsi_host_ptr->hostt->name;
- aac->id = aac->scsi_host_ptr->unique_id;
- /* Initialize the ordinal number of the device to -1 */
- fsa_dev_ptr = &(aac->fsa_dev);
- for( container = 0; container < MAXIMUM_NUM_CONTAINERS; container++ )
- fsa_dev_ptr->devno[container] = -1;
- dprintk((KERN_DEBUG "Initializing Hardware...n"));
- if((*aac_drivers[index].init)(aac , host_ptr->unique_id) != 0)
- {
- /* device initialization failed */
- printk(KERN_WARNING "aacraid: device initialization failed.n");
- scsi_unregister(host_ptr);
- aac_count--;
- continue;
- }
- dprintk((KERN_DEBUG "%s:%d device initialization successful.n", name, host_ptr->unique_id));
- aac_get_adapter_info(aac);
- if(nondasd != -1)
- {
- /* someone told us how to set this on the cmdline */
- aac->nondasd_support = (nondasd!=0);
- }
- if(aac->nondasd_support != 0){
- printk(KERN_INFO "%s%d: Non-DASD support enabledn", aac->name, aac->id);
- }
- dprintk((KERN_DEBUG "%s:%d options flag %04x.n",name, host_ptr->unique_id,aac->adapter_info.options));
- if(aac->nondasd_support == 1)
- {
- /*
- * max channel will be the physical channels plus 1 virtual channel
- * all containers are on the virtual channel 0
- * physical channels are address by their actual physical number+1
- */
- host_ptr->max_channel = aac_drivers[index].channels+1;
- } else {
- host_ptr->max_channel = 1;
- }
- dprintk((KERN_DEBUG "Device has %d logical channelsn", host_ptr->max_channel));
- aac_get_containers(aac);
- aac_devices[aac_count-1] = aac;
- /*
- * dmb - we may need to move these 3 parms somewhere else once
- * we get a fib that can report the actual numbers
- */
- host_ptr->max_id = AAC_MAX_TARGET;
- host_ptr->max_lun = AAC_MAX_LUN;
-
- /*
- * If we are PAE capable then our future DMA mappings
- * (for read/write commands) are 64bit clean and don't
- * need bouncing. This assumes we do no other 32bit only
- * allocations (eg fib table expands) after this point.
- */
-
- if(aac->pae_support)
- pci_set_dma_mask(dev, 0xFFFFFFFFFFFFFFFFUL);
- }
- }
- if( aac_count ){
- if((aac_cfg_major = register_chrdev( 0, "aac", &aac_cfg_fops))<0)
- printk(KERN_WARNING "aacraid: unable to register "aac" device.n");
- }
- template->present = aac_count; /* # of cards of this type found */
- return aac_count;
- }
- /**
- * aac_release - release SCSI host resources
- * @host_ptr: SCSI host to clean up
- *
- * Release all resources previously acquired to support a specific Host
- * Adapter and unregister the AAC Host Adapter.
- *
- * BUGS: Does not wait for the thread it kills to die.
- */
- static int aac_release(struct Scsi_Host *host_ptr)
- {
- struct aac_dev *dev;
- dprintk((KERN_DEBUG "aac_release.n"));
- dev = (struct aac_dev *)host_ptr->hostdata;
- /*
- * kill any threads we started
- */
- kill_proc(dev->thread_pid, SIGKILL, 0);
- wait_for_completion(&dev->aif_completion);
- /*
- * Call the comm layer to detach from this adapter
- */
- aac_detach(dev);
- /* Check free orderings... */
- /* remove interrupt binding */
- free_irq(host_ptr->irq, dev);
- iounmap((void * )dev->regs.sa);
- /* unregister adapter */
- scsi_unregister(host_ptr);
- /*
- * FIXME: This assumes no hot plugging is going on...
- */
- if( aac_cfg_major >= 0 )
- {
- unregister_chrdev(aac_cfg_major, "aac");
- aac_cfg_major = -1;
- }
- return 0;
- }
- /**
- * aac_queuecommand - queue a SCSI command
- * @scsi_cmnd_ptr: SCSI command to queue
- * @CompletionRoutine: Function to call on command completion
- *
- * Queues a command for execution by the associated Host Adapter.
- */
- static int aac_queuecommand(Scsi_Cmnd *scsi_cmnd_ptr, void (*complete)(Scsi_Cmnd *))
- {
- int ret;
- scsi_cmnd_ptr->scsi_done = complete;
- /*
- * aac_scsi_cmd() handles command processing, setting the
- * result code and calling completion routine.
- */
- if((ret = aac_scsi_cmd(scsi_cmnd_ptr)) != 0)
- dprintk((KERN_DEBUG "aac_scsi_cmd failed.n"));
- return ret;
- }
- /**
- * aac_driverinfo - Returns the host adapter name
- * @host_ptr: Scsi host to report on
- *
- * Returns a static string describing the device in question
- */
- const char *aac_driverinfo(struct Scsi_Host *host_ptr)
- {
- struct aac_dev *dev = (struct aac_dev *)host_ptr->hostdata;
- return aac_drivers[dev->cardtype].name;
- }
- /**
- * aac_get_driver_ident
- * @devtype: index into lookup table
- *
- * Returns a pointer to the entry in the driver lookup table.
- */
- struct aac_driver_ident* aac_get_driver_ident(int devtype)
- {
- return &aac_drivers[devtype];
- }
- /**
- * aac_biosparm - return BIOS parameters for disk
- * @disk: SCSI disk object to process
- * @device: kdev_t of the disk in question
- * @geom: geometry block to fill in
- *
- * Return the Heads/Sectors/Cylinders BIOS Disk Parameters for Disk.
- * The default disk geometry is 64 heads, 32 sectors, and the appropriate
- * number of cylinders so as not to exceed drive capacity. In order for
- * disks equal to or larger than 1 GB to be addressable by the BIOS
- * without exceeding the BIOS limitation of 1024 cylinders, Extended
- * Translation should be enabled. With Extended Translation enabled,
- * drives between 1 GB inclusive and 2 GB exclusive are given a disk
- * geometry of 128 heads and 32 sectors, and drives above 2 GB inclusive
- * are given a disk geometry of 255 heads and 63 sectors. However, if
- * the BIOS detects that the Extended Translation setting does not match
- * the geometry in the partition table, then the translation inferred
- * from the partition table will be used by the BIOS, and a warning may
- * be displayed.
- */
-
- static int aac_biosparm(Scsi_Disk *disk, kdev_t dev, int *geom)
- {
- struct diskparm *param = (struct diskparm *)geom;
- struct buffer_head * buf;
- dprintk((KERN_DEBUG "aac_biosparm.n"));
- /*
- * Assuming extended translation is enabled - #REVISIT#
- */
- if( disk->capacity >= 2 * 1024 * 1024 ) /* 1 GB in 512 byte sectors */
- {
- if( disk->capacity >= 4 * 1024 * 1024 ) /* 2 GB in 512 byte sectors */
- {
- param->heads = 255;
- param->sectors = 63;
- }
- else
- {
- param->heads = 128;
- param->sectors = 32;
- }
- }
- else
- {
- param->heads = 64;
- param->sectors = 32;
- }
- param->cylinders = disk->capacity/(param->heads * param->sectors);
- /*
- * Read the first 1024 bytes from the disk device
- */
- buf = bread(MKDEV(MAJOR(dev), MINOR(dev)&~0xf), 0, block_size(dev));
- if(buf == NULL)
- return 0;
- /*
- * If the boot sector partition table is valid, search for a partition
- * table entry whose end_head matches one of the standard geometry
- * translations ( 64/32, 128/32, 255/63 ).
- */
-
- if(*(unsigned short *)(buf->b_data + 0x1fe) == cpu_to_le16(0xaa55))
- {
- struct partition *first = (struct partition * )(buf->b_data + 0x1be);
- struct partition *entry = first;
- int saved_cylinders = param->cylinders;
- int num;
- unsigned char end_head, end_sec;
- for(num = 0; num < 4; num++)
- {
- end_head = entry->end_head;
- end_sec = entry->end_sector & 0x3f;
- if(end_head == 63)
- {
- param->heads = 64;
- param->sectors = 32;
- break;
- }
- else if(end_head == 127)
- {
- param->heads = 128;
- param->sectors = 32;
- break;
- }
- else if(end_head == 254)
- {
- param->heads = 255;
- param->sectors = 63;
- break;
- }
- entry++;
- }
- if(num == 4)
- {
- end_head = first->end_head;
- end_sec = first->end_sector & 0x3f;
- }
- param->cylinders = disk->capacity / (param->heads * param->sectors);
- if(num < 4 && end_sec == param->sectors)
- {
- if(param->cylinders != saved_cylinders)
- dprintk((KERN_DEBUG "Adopting geometry: heads=%d, sectors=%d from partition table %d.n",
- param->heads, param->sectors, num));
- }
- else if(end_head > 0 || end_sec > 0)
- {
- dprintk((KERN_DEBUG "Strange geometry: heads=%d, sectors=%d in partition table %d.n",
- end_head + 1, end_sec, num));
- dprintk((KERN_DEBUG "Using geometry: heads=%d, sectors=%d.n",
- param->heads, param->sectors));
- }
- }
- brelse(buf);
- return 0;
- }
- /**
- * aac_queuedepth - compute queue depths
- * @host: SCSI host in question
- * @dev: SCSI device we are considering
- *
- * Selects queue depths for each target device based on the host adapter's
- * total capacity and the queue depth supported by the target device.
- * A queue depth of one automatically disables tagged queueing.
- */
- static void aac_queuedepth(struct Scsi_Host * host, Scsi_Device * dev )
- {
- Scsi_Device * dptr;
- dprintk((KERN_DEBUG "aac_queuedepth.n"));
- dprintk((KERN_DEBUG "Device # Q Depth Onlinen"));
- dprintk((KERN_DEBUG "---------------------------n"));
- for(dptr = dev; dptr != NULL; dptr = dptr->next)
- {
- if(dptr->host == host)
- {
- dptr->queue_depth = 10;
- dprintk((KERN_DEBUG " %2d %d %dn",
- dptr->id, dptr->queue_depth, dptr->online));
- }
- }
- }
- /**
- * aac_eh_abort - Abort command if possible.
- * @cmd: SCSI command block to abort
- *
- * Called when the midlayer wishes to abort a command. We don't support
- * this facility, and our firmware looks after life for us. We just
- * report this as failing
- */
-
- static int aac_eh_abort(Scsi_Cmnd *cmd)
- {
- return FAILED;
- }
- /**
- * aac_eh_device_reset - Reset command handling
- * @cmd: SCSI command block causing the reset
- *
- * Issue a reset of a SCSI device. We are ourselves not truely a SCSI
- * controller and our firmware will do the work for us anyway. Thus this
- * is a no-op. We just return FAILED.
- */
- static int aac_eh_device_reset(Scsi_Cmnd *cmd)
- {
- return FAILED;
- }
- /**
- * aac_eh_bus_reset - Reset command handling
- * @scsi_cmd: SCSI command block causing the reset
- *
- * Issue a reset of a SCSI bus. We are ourselves not truely a SCSI
- * controller and our firmware will do the work for us anyway. Thus this
- * is a no-op. We just return FAILED.
- */
- static int aac_eh_bus_reset(Scsi_Cmnd* cmd)
- {
- return FAILED;
- }
- /**
- * aac_eh_hba_reset - Reset command handling
- * @scsi_cmd: SCSI command block causing the reset
- *
- * Issue a reset of a SCSI host. If things get this bad then arguably we should
- * go take a look at what the host adapter is doing and see if something really
- * broke (as can occur at least on my Dell QC card if a drive keeps failing spinup)
- */
- static int aac_eh_reset(Scsi_Cmnd* cmd)
- {
- printk(KERN_ERR "aacraid: Host adapter reset request. SCSI hang ?n");
- return FAILED;
- }
- /**
- * aac_ioctl - Handle SCSI ioctls
- * @scsi_dev_ptr: scsi device to operate upon
- * @cmd: ioctl command to use issue
- * @arg: ioctl data pointer
- *
- * Issue an ioctl on an aacraid device. Returns a standard unix error code or
- * zero for success
- */
-
- static int aac_ioctl(Scsi_Device * scsi_dev_ptr, int cmd, void * arg)
- {
- struct aac_dev *dev;
- dprintk((KERN_DEBUG "aac_ioctl.n"));
- dev = (struct aac_dev *)scsi_dev_ptr->host->hostdata;
- return aac_do_ioctl(dev, cmd, arg);
- }
- /**
- * aac_cfg_open - open a configuration file
- * @inode: inode being opened
- * @file: file handle attached
- *
- * Called when the configuration device is opened. Does the needed
- * set up on the handle and then returns
- *
- * Bugs: This needs extending to check a given adapter is present
- * so we can support hot plugging, and to ref count adapters.
- */
- static int aac_cfg_open(struct inode * inode, struct file * file )
- {
- unsigned minor_number = MINOR(inode->i_rdev);
- if(minor_number >= aac_count)
- return -ENODEV;
- return 0;
- }
- /**
- * aac_cfg_release - close down an AAC config device
- * @inode: inode of configuration file
- * @file: file handle of configuration file
- *
- * Called when the last close of the configuration file handle
- * is performed.
- */
-
- static int aac_cfg_release(struct inode * inode, struct file * file )
- {
- return 0;
- }
- /**
- * aac_cfg_ioctl - AAC configuration request
- * @inode: inode of device
- * @file: file handle
- * @cmd: ioctl command code
- * @arg: argument
- *
- * Handles a configuration ioctl. Currently this involves wrapping it
- * up and feeding it into the nasty windowsalike glue layer.
- *
- * Bugs: Needs locking against parallel ioctls lower down
- * Bugs: Needs to handle hot plugging
- */
-
- static int aac_cfg_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg )
- {
- struct aac_dev *dev = aac_devices[MINOR(inode->i_rdev)];
- return aac_do_ioctl(dev, cmd, (void *)arg);
- }
- /*
- * To use the low level SCSI driver support using the linux kernel loadable
- * module interface we should initialize the global variable driver_interface
- * (datatype Scsi_Host_Template) and then include the file scsi_module.c.
- */
-
- static Scsi_Host_Template driver_template = {
- module: THIS_MODULE,
- name: "AAC",
- proc_info: aac_procinfo,
- detect: aac_detect,
- release: aac_release,
- info: aac_driverinfo,
- ioctl: aac_ioctl,
- queuecommand: aac_queuecommand,
- bios_param: aac_biosparm,
- can_queue: AAC_NUM_IO_FIB,
- this_id: 16,
- sg_tablesize: 16,
- max_sectors: 128,
- cmd_per_lun: AAC_NUM_IO_FIB,
- eh_abort_handler: aac_eh_abort,
- eh_device_reset_handler:aac_eh_device_reset,
- eh_bus_reset_handler: aac_eh_bus_reset,
- eh_host_reset_handler: aac_eh_reset,
- use_new_eh_code: 1,
- use_clustering: ENABLE_CLUSTERING,
- };
- #include "scsi_module.c"
- /**
- * aac_procinfo - Implement /proc/scsi/<drivername>/<n>
- * @proc_buffer: memory buffer for I/O
- * @start_ptr: pointer to first valid data
- * @offset: offset into file
- * @bytes_available: space left
- * @host_no: scsi host ident
- * @write: direction of I/O
- *
- * Used to export driver statistics and other infos to the world outside
- * the kernel using the proc file system. Also provides an interface to
- * feed the driver with information.
- *
- * For reads
- * - if offset > 0 return 0
- * - if offset == 0 write data to proc_buffer and set the start_ptr to
- * beginning of proc_buffer, return the number of characters written.
- * For writes
- * - writes currently not supported, return 0
- *
- * Bugs: Only offset zero is handled
- */
- static int aac_procinfo(char *proc_buffer, char **start_ptr,off_t offset,
- int bytes_available, int host_no, int write)
- {
- if(write || offset > 0)
- return 0;
- *start_ptr = proc_buffer;
- return sprintf(proc_buffer, "%s %dn", "Raid Controller, scsi hba number", host_no);
- }
- EXPORT_NO_SYMBOLS;