/* * Adaptec AAC series RAID controller driver * (c) Copyright 2001 Red Hat Inc. * * 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 /* #include */ #include #include #include #include /* #include */ /* #include */ /* #include */ #include /* #include */ #include #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); #if 0 /* * Initialize the mutex used to wait for the next AIF. */ init_MUTEX_LOCKED(&fibctx->wait_sem); #endif 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, *aifc
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