commctrl.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:10k
- /*
- * 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:
- * commctrl.c
- *
- * Abstract: Contains all routines for control of the AFA comm layer
- *
- */
- #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 <linux/blk.h>
- #include <asm/semaphore.h>
- #include <asm/uaccess.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "aacraid.h"
- /**
- * ioctl_send_fib - send a FIB from userspace
- * @dev: adapter is being processed
- * @arg: arguments to the ioctl call
- *
- * This routine sends a fib to the adapter on behalf of a user level
- * program.
- */
-
- static int ioctl_send_fib(struct aac_dev * dev, void *arg)
- {
- struct hw_fib * kfib;
- struct fib *fibptr;
- fibptr = fib_alloc(dev);
- if(fibptr == NULL)
- return -ENOMEM;
-
- kfib = fibptr->fib;
- /*
- * First copy in the header so that we can check the size field.
- */
- if (copy_from_user((void *)kfib, arg, sizeof(struct aac_fibhdr))) {
- fib_free(fibptr);
- return -EFAULT;
- }
- /*
- * Since we copy based on the fib header size, make sure that we
- * will not overrun the buffer when we copy the memory. Return
- * an error if we would.
- */
- if(le32_to_cpu(kfib->header.Size) > sizeof(struct hw_fib) - sizeof(struct aac_fibhdr)) {
- fib_free(fibptr);
- return -EINVAL;
- }
- if (copy_from_user((void *) kfib, arg, le32_to_cpu(kfib->header.Size) + sizeof(struct aac_fibhdr))) {
- fib_free(fibptr);
- return -EFAULT;
- }
- if (kfib->header.Command == cpu_to_le32(TakeABreakPt)) {
- aac_adapter_interrupt(dev);
- /*
- * Since we didn't really send a fib, zero out the state to allow
- * cleanup code not to assert.
- */
- kfib->header.XferState = 0;
- } else {
- if (fib_send(kfib->header.Command, fibptr, le32_to_cpu(kfib->header.Size) , FsaNormal,
- 1, 1, NULL, NULL) != 0)
- {
- fib_free(fibptr);
- return -EINVAL;
- }
- if (fib_complete(fibptr) != 0) {
- fib_free(fibptr);
- return -EINVAL;
- }
- }
- /*
- * Make sure that the size returned by the adapter (which includes
- * the header) is less than or equal to the size of a fib, so we
- * don't corrupt application data. Then copy that size to the user
- * buffer. (Don't try to add the header information again, since it
- * was already included by the adapter.)
- */
- if (copy_to_user(arg, (void *)kfib, kfib->header.Size)) {
- fib_free(fibptr);
- return -EFAULT;
- }
- fib_free(fibptr);
- return 0;
- }
- /**
- * open_getadapter_fib - Get the next fib
- *
- * This routine will get the next Fib, if available, from the AdapterFibContext
- * passed in from the user.
- */
- static int open_getadapter_fib(struct aac_dev * dev, void *arg)
- {
- struct aac_fib_context * fibctx;
- int status;
- unsigned long flags;
- fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
- if (fibctx == NULL) {
- status = -ENOMEM;
- } else {
- fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
- fibctx->size = sizeof(struct aac_fib_context);
- /*
- * Initialize the mutex used to wait for the next AIF.
- */
- init_MUTEX_LOCKED(&fibctx->wait_sem);
- fibctx->wait = 0;
- /*
- * Initialize the fibs and set the count of fibs on
- * the list to 0.
- */
- fibctx->count = 0;
- INIT_LIST_HEAD(&fibctx->fibs);
- fibctx->jiffies = jiffies/HZ;
- /*
- * Now add this context onto the adapter's
- * AdapterFibContext list.
- */
- spin_lock_irqsave(&dev->fib_lock, flags);
- list_add_tail(&fibctx->next, &dev->fib_list);
- spin_unlock_irqrestore(&dev->fib_lock, flags);
- if (copy_to_user(arg, &fibctx, sizeof(struct aac_fib_context *))) {
- status = -EFAULT;
- } else {
- status = 0;
- }
- }
- return status;
- }
- /**
- * next_getadapter_fib - get the next fib
- * @dev: adapter to use
- * @arg: ioctl argument
- *
- * This routine will get the next Fib, if available, from the AdapterFibContext
- * passed in from the user.
- */
- static int next_getadapter_fib(struct aac_dev * dev, void *arg)
- {
- struct fib_ioctl f;
- struct aac_fib_context *fibctx, *aifcp;
- struct hw_fib * fib;
- int status;
- struct list_head * entry;
- int found;
- unsigned long flags;
-
- if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
- return -EFAULT;
- /*
- * Extract the AdapterFibContext from the Input parameters.
- */
- fibctx = (struct aac_fib_context *) f.fibctx;
- /*
- * Verify that the HANDLE passed in was a valid AdapterFibContext
- *
- * Search the list of AdapterFibContext addresses on the adapter
- * to be sure this is a valid address
- */
- found = 0;
- entry = dev->fib_list.next;
- while(entry != &dev->fib_list) {
- aifcp = list_entry(entry, struct aac_fib_context, next);
- if(fibctx == aifcp) { /* We found a winner */
- found = 1;
- break;
- }
- entry = entry->next;
- }
- if (found == 0)
- return -EINVAL;
- if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
- (fibctx->size != sizeof(struct aac_fib_context)))
- return -EINVAL;
- status = 0;
- spin_lock_irqsave(&dev->fib_lock, flags);
- /*
- * If there are no fibs to send back, then either wait or return
- * -EAGAIN
- */
- return_fib:
- if (!list_empty(&fibctx->fibs)) {
- struct list_head * entry;
- /*
- * Pull the next fib from the fibs
- */
- entry = fibctx->fibs.next;
- list_del(entry);
-
- fib = list_entry(entry, struct hw_fib, header.FibLinks);
- fibctx->count--;
- spin_unlock_irqrestore(&dev->fib_lock, flags);
- if (copy_to_user(f.fib, fib, sizeof(struct hw_fib))) {
- kfree(fib);
- return -EFAULT;
- }
- /*
- * Free the space occupied by this copy of the fib.
- */
- kfree(fib);
- status = 0;
- fibctx->jiffies = jiffies/HZ;
- } else {
- spin_unlock_irqrestore(&dev->fib_lock, flags);
- if (f.wait) {
- if(down_interruptible(&fibctx->wait_sem) < 0) {
- status = -EINTR;
- } else {
- /* Lock again and retry */
- spin_lock_irqsave(&dev->fib_lock, flags);
- goto return_fib;
- }
- } else {
- status = -EAGAIN;
- }
- }
- return status;
- }
- int aac_close_fib_context(struct aac_dev * dev, struct aac_fib_context * fibctx)
- {
- struct hw_fib *fib;
- /*
- * First free any FIBs that have not been consumed.
- */
- while (!list_empty(&fibctx->fibs)) {
- struct list_head * entry;
- /*
- * Pull the next fib from the fibs
- */
- entry = fibctx->fibs.next;
- list_del(entry);
- fib = list_entry(entry, struct hw_fib, header.FibLinks);
- fibctx->count--;
- /*
- * Free the space occupied by this copy of the fib.
- */
- kfree(fib);
- }
- /*
- * Remove the Context from the AdapterFibContext List
- */
- list_del(&fibctx->next);
- /*
- * Invalidate context
- */
- fibctx->type = 0;
- /*
- * Free the space occupied by the Context
- */
- kfree(fibctx);
- return 0;
- }
- /**
- * close_getadapter_fib - close down user fib context
- * @dev: adapter
- * @arg: ioctl arguments
- *
- * This routine will close down the fibctx passed in from the user.
- */
-
- static int close_getadapter_fib(struct aac_dev * dev, void *arg)
- {
- struct aac_fib_context *fibctx, *aifcp;
- int status;
- unsigned long flags;
- struct list_head * entry;
- int found;
- /*
- * Extract the fibctx from the input parameters
- */
- fibctx = arg;
- /*
- * Verify that the HANDLE passed in was a valid AdapterFibContext
- *
- * Search the list of AdapterFibContext addresses on the adapter
- * to be sure this is a valid address
- */
- found = 0;
- entry = dev->fib_list.next;
- while(entry != &dev->fib_list) {
- aifcp = list_entry(entry, struct aac_fib_context, next);
- if(fibctx == aifcp) { /* We found a winner */
- found = 1;
- break;
- }
- entry = entry->next;
- }
- if(found == 0)
- return 0; /* Already gone */
- if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
- (fibctx->size != sizeof(struct aac_fib_context)))
- return -EINVAL;
- spin_lock_irqsave(&dev->fib_lock, flags);
- status = aac_close_fib_context(dev, fibctx);
- spin_unlock_irqrestore(&dev->fib_lock, flags);
- return status;
- }
- /**
- * check_revision - close down user fib context
- * @dev: adapter
- * @arg: ioctl arguments
- *
- * This routine returns the firmware version.
- * Under Linux, there have been no version incompatibilities, so this is simple!
- */
- static int check_revision(struct aac_dev *dev, void *arg)
- {
- struct revision response;
- response.compat = 1;
- response.version = dev->adapter_info.kernelrev;
- response.build = dev->adapter_info.kernelbuild;
- if (copy_to_user(arg, &response, sizeof(response)))
- return -EFAULT;
- return 0;
- }
- struct aac_pci_info {
- u32 bus;
- u32 slot;
- };
- int aac_get_pci_info(struct aac_dev* dev, void* arg)
- {
- struct aac_pci_info pci_info;
- pci_info.bus = dev->pdev->bus->number;
- pci_info.slot = PCI_SLOT(dev->pdev->devfn);
- if(copy_to_user( arg, (void*)&pci_info, sizeof(struct aac_pci_info)))
- return -EFAULT;
- return 0;
- }
-
- int aac_do_ioctl(struct aac_dev * dev, int cmd, void *arg)
- {
- int status;
-
- /*
- * HBA gets first crack
- */
-
- status = aac_dev_ioctl(dev, cmd, arg);
- if(status != -ENOTTY)
- return status;
- switch (cmd) {
- case FSACTL_MINIPORT_REV_CHECK:
- status = check_revision(dev, arg);
- break;
- case FSACTL_SENDFIB:
- status = ioctl_send_fib(dev, arg);
- break;
- case FSACTL_OPEN_GET_ADAPTER_FIB:
- status = open_getadapter_fib(dev, arg);
- break;
- case FSACTL_GET_NEXT_ADAPTER_FIB:
- status = next_getadapter_fib(dev, arg);
- break;
- case FSACTL_CLOSE_GET_ADAPTER_FIB:
- status = close_getadapter_fib(dev, arg);
- break;
- case FSACTL_GET_PCI_INFO:
- status = aac_get_pci_info(dev,arg);
- break;
- default:
- status = -ENOTTY;
- break;
- }
- return status;
- }