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684 lines
17 KiB
C
684 lines
17 KiB
C
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/*
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* Adaptec AAC series RAID controller driver
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* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
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*
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* based on the old aacraid driver that is..
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* Adaptec aacraid device driver for Linux.
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*
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* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Module Name:
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* commctrl.c
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*
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* Abstract: Contains all routines for control of the AFA comm layer
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/completion.h>
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#include <linux/dma-mapping.h>
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#include <linux/blkdev.h>
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#include <asm/semaphore.h>
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#include <asm/uaccess.h>
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#include "aacraid.h"
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/**
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* ioctl_send_fib - send a FIB from userspace
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* @dev: adapter is being processed
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* @arg: arguments to the ioctl call
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*
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* This routine sends a fib to the adapter on behalf of a user level
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* program.
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*/
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static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
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{
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struct hw_fib * kfib;
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struct fib *fibptr;
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fibptr = fib_alloc(dev);
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if(fibptr == NULL)
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return -ENOMEM;
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kfib = fibptr->hw_fib;
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/*
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* First copy in the header so that we can check the size field.
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*/
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if (copy_from_user((void *)kfib, arg, sizeof(struct aac_fibhdr))) {
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fib_free(fibptr);
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return -EFAULT;
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}
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/*
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* Since we copy based on the fib header size, make sure that we
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* will not overrun the buffer when we copy the memory. Return
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* an error if we would.
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*/
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if (le16_to_cpu(kfib->header.Size) >
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sizeof(struct hw_fib) - sizeof(struct aac_fibhdr)) {
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fib_free(fibptr);
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return -EINVAL;
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}
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if (copy_from_user(kfib, arg, le16_to_cpu(kfib->header.Size) +
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sizeof(struct aac_fibhdr))) {
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fib_free(fibptr);
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return -EFAULT;
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}
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if (kfib->header.Command == cpu_to_le32(TakeABreakPt)) {
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aac_adapter_interrupt(dev);
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/*
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* Since we didn't really send a fib, zero out the state to allow
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* cleanup code not to assert.
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*/
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kfib->header.XferState = 0;
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} else {
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int retval = fib_send(kfib->header.Command, fibptr,
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le16_to_cpu(kfib->header.Size) , FsaNormal,
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1, 1, NULL, NULL);
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if (retval) {
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fib_free(fibptr);
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return retval;
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}
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if (fib_complete(fibptr) != 0) {
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fib_free(fibptr);
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return -EINVAL;
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}
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}
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/*
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* Make sure that the size returned by the adapter (which includes
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* the header) is less than or equal to the size of a fib, so we
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* don't corrupt application data. Then copy that size to the user
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* buffer. (Don't try to add the header information again, since it
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* was already included by the adapter.)
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*/
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if (copy_to_user(arg, (void *)kfib, kfib->header.Size)) {
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fib_free(fibptr);
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return -EFAULT;
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}
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fib_free(fibptr);
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return 0;
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}
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/**
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* open_getadapter_fib - Get the next fib
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*
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* This routine will get the next Fib, if available, from the AdapterFibContext
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* passed in from the user.
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*/
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static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
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{
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struct aac_fib_context * fibctx;
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int status;
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fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
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if (fibctx == NULL) {
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status = -ENOMEM;
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} else {
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unsigned long flags;
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struct list_head * entry;
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struct aac_fib_context * context;
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fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
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fibctx->size = sizeof(struct aac_fib_context);
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/*
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* Yes yes, I know this could be an index, but we have a
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* better guarantee of uniqueness for the locked loop below.
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* Without the aid of a persistent history, this also helps
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* reduce the chance that the opaque context would be reused.
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*/
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fibctx->unique = (u32)((ulong)fibctx & 0xFFFFFFFF);
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/*
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* Initialize the mutex used to wait for the next AIF.
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*/
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init_MUTEX_LOCKED(&fibctx->wait_sem);
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fibctx->wait = 0;
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/*
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* Initialize the fibs and set the count of fibs on
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* the list to 0.
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*/
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fibctx->count = 0;
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INIT_LIST_HEAD(&fibctx->fib_list);
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fibctx->jiffies = jiffies/HZ;
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/*
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* Now add this context onto the adapter's
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* AdapterFibContext list.
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*/
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spin_lock_irqsave(&dev->fib_lock, flags);
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/* Ensure that we have a unique identifier */
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entry = dev->fib_list.next;
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while (entry != &dev->fib_list) {
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context = list_entry(entry, struct aac_fib_context, next);
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if (context->unique == fibctx->unique) {
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/* Not unique (32 bits) */
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fibctx->unique++;
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entry = dev->fib_list.next;
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} else {
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entry = entry->next;
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}
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}
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list_add_tail(&fibctx->next, &dev->fib_list);
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spin_unlock_irqrestore(&dev->fib_lock, flags);
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if (copy_to_user(arg, &fibctx->unique,
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sizeof(fibctx->unique))) {
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status = -EFAULT;
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} else {
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status = 0;
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}
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}
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return status;
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}
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/**
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* next_getadapter_fib - get the next fib
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* @dev: adapter to use
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* @arg: ioctl argument
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*
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* This routine will get the next Fib, if available, from the AdapterFibContext
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* passed in from the user.
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*/
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static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
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{
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struct fib_ioctl f;
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struct fib *fib;
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struct aac_fib_context *fibctx;
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int status;
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struct list_head * entry;
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unsigned long flags;
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if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
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return -EFAULT;
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/*
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* Verify that the HANDLE passed in was a valid AdapterFibContext
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*
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* Search the list of AdapterFibContext addresses on the adapter
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* to be sure this is a valid address
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*/
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entry = dev->fib_list.next;
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fibctx = NULL;
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while (entry != &dev->fib_list) {
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fibctx = list_entry(entry, struct aac_fib_context, next);
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/*
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* Extract the AdapterFibContext from the Input parameters.
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*/
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if (fibctx->unique == f.fibctx) { /* We found a winner */
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break;
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}
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entry = entry->next;
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fibctx = NULL;
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}
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if (!fibctx) {
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dprintk ((KERN_INFO "Fib Context not found\n"));
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return -EINVAL;
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}
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if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
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(fibctx->size != sizeof(struct aac_fib_context))) {
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dprintk ((KERN_INFO "Fib Context corrupt?\n"));
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return -EINVAL;
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}
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status = 0;
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spin_lock_irqsave(&dev->fib_lock, flags);
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/*
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* If there are no fibs to send back, then either wait or return
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* -EAGAIN
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*/
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return_fib:
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if (!list_empty(&fibctx->fib_list)) {
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struct list_head * entry;
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/*
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* Pull the next fib from the fibs
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*/
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entry = fibctx->fib_list.next;
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list_del(entry);
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fib = list_entry(entry, struct fib, fiblink);
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fibctx->count--;
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spin_unlock_irqrestore(&dev->fib_lock, flags);
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if (copy_to_user(f.fib, fib->hw_fib, sizeof(struct hw_fib))) {
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kfree(fib->hw_fib);
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kfree(fib);
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return -EFAULT;
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}
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/*
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* Free the space occupied by this copy of the fib.
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*/
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kfree(fib->hw_fib);
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kfree(fib);
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status = 0;
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fibctx->jiffies = jiffies/HZ;
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} else {
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spin_unlock_irqrestore(&dev->fib_lock, flags);
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if (f.wait) {
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if(down_interruptible(&fibctx->wait_sem) < 0) {
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status = -EINTR;
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} else {
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/* Lock again and retry */
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spin_lock_irqsave(&dev->fib_lock, flags);
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goto return_fib;
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}
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} else {
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status = -EAGAIN;
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}
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}
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return status;
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}
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int aac_close_fib_context(struct aac_dev * dev, struct aac_fib_context * fibctx)
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{
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struct fib *fib;
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/*
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* First free any FIBs that have not been consumed.
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*/
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while (!list_empty(&fibctx->fib_list)) {
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struct list_head * entry;
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/*
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* Pull the next fib from the fibs
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*/
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entry = fibctx->fib_list.next;
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list_del(entry);
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fib = list_entry(entry, struct fib, fiblink);
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fibctx->count--;
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/*
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* Free the space occupied by this copy of the fib.
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*/
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kfree(fib->hw_fib);
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kfree(fib);
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}
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/*
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* Remove the Context from the AdapterFibContext List
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*/
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list_del(&fibctx->next);
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/*
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* Invalidate context
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*/
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fibctx->type = 0;
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/*
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* Free the space occupied by the Context
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*/
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kfree(fibctx);
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return 0;
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}
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/**
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* close_getadapter_fib - close down user fib context
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* @dev: adapter
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* @arg: ioctl arguments
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*
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* This routine will close down the fibctx passed in from the user.
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*/
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static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
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{
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struct aac_fib_context *fibctx;
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int status;
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unsigned long flags;
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struct list_head * entry;
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/*
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* Verify that the HANDLE passed in was a valid AdapterFibContext
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*
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* Search the list of AdapterFibContext addresses on the adapter
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* to be sure this is a valid address
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*/
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entry = dev->fib_list.next;
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fibctx = NULL;
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while(entry != &dev->fib_list) {
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fibctx = list_entry(entry, struct aac_fib_context, next);
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/*
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* Extract the fibctx from the input parameters
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*/
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if (fibctx->unique == (u32)(unsigned long)arg) {
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/* We found a winner */
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break;
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}
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entry = entry->next;
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fibctx = NULL;
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}
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if (!fibctx)
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return 0; /* Already gone */
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if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
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(fibctx->size != sizeof(struct aac_fib_context)))
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return -EINVAL;
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spin_lock_irqsave(&dev->fib_lock, flags);
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status = aac_close_fib_context(dev, fibctx);
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spin_unlock_irqrestore(&dev->fib_lock, flags);
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return status;
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}
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/**
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* check_revision - close down user fib context
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* @dev: adapter
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* @arg: ioctl arguments
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*
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* This routine returns the driver version.
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* Under Linux, there have been no version incompatibilities, so this is
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* simple!
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*/
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static int check_revision(struct aac_dev *dev, void __user *arg)
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{
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struct revision response;
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response.compat = 1;
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response.version = dev->adapter_info.kernelrev;
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response.build = dev->adapter_info.kernelbuild;
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if (copy_to_user(arg, &response, sizeof(response)))
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return -EFAULT;
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return 0;
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}
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/**
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*
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* aac_send_raw_scb
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*
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*/
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int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
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{
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struct fib* srbfib;
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int status;
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struct aac_srb *srbcmd;
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struct aac_srb __user *user_srb = arg;
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struct aac_srb_reply __user *user_reply;
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struct aac_srb_reply* reply;
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u32 fibsize = 0;
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u32 flags = 0;
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s32 rcode = 0;
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u32 data_dir;
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void __user *sg_user[32];
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void *sg_list[32];
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u32 sg_indx = 0;
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u32 byte_count = 0;
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u32 actual_fibsize = 0;
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int i;
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if (!capable(CAP_SYS_ADMIN)){
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printk(KERN_DEBUG"aacraid: No permission to send raw srb\n");
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return -EPERM;
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}
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/*
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* Allocate and initialize a Fib then setup a BlockWrite command
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*/
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if (!(srbfib = fib_alloc(dev))) {
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return -1;
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}
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fib_init(srbfib);
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srbcmd = (struct aac_srb*) fib_data(srbfib);
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if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
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printk(KERN_DEBUG"aacraid: Could not copy data size from user\n");
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rcode = -EFAULT;
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goto cleanup;
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}
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if (fibsize > FIB_DATA_SIZE_IN_BYTES) {
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rcode = -EINVAL;
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goto cleanup;
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}
|
||
|
|
||
|
if(copy_from_user(srbcmd, user_srb,fibsize)){
|
||
|
printk(KERN_DEBUG"aacraid: Could not copy srb from user\n");
|
||
|
rcode = -EFAULT;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
|
||
|
user_reply = arg+fibsize;
|
||
|
|
||
|
flags = srbcmd->flags;
|
||
|
// Fix up srb for endian and force some values
|
||
|
srbcmd->function = cpu_to_le32(SRBF_ExecuteScsi); // Force this
|
||
|
srbcmd->channel = cpu_to_le32(srbcmd->channel);
|
||
|
srbcmd->id = cpu_to_le32(srbcmd->id);
|
||
|
srbcmd->lun = cpu_to_le32(srbcmd->lun);
|
||
|
srbcmd->flags = cpu_to_le32(srbcmd->flags);
|
||
|
srbcmd->timeout = cpu_to_le32(srbcmd->timeout);
|
||
|
srbcmd->retry_limit =cpu_to_le32(0); // Obsolete parameter
|
||
|
srbcmd->cdb_size = cpu_to_le32(srbcmd->cdb_size);
|
||
|
|
||
|
switch (srbcmd->flags & (SRB_DataIn | SRB_DataOut)) {
|
||
|
case SRB_DataOut:
|
||
|
data_dir = DMA_TO_DEVICE;
|
||
|
break;
|
||
|
case (SRB_DataIn | SRB_DataOut):
|
||
|
data_dir = DMA_BIDIRECTIONAL;
|
||
|
break;
|
||
|
case SRB_DataIn:
|
||
|
data_dir = DMA_FROM_DEVICE;
|
||
|
break;
|
||
|
default:
|
||
|
data_dir = DMA_NONE;
|
||
|
}
|
||
|
if (dev->dac_support == 1) {
|
||
|
struct sgmap64* psg = (struct sgmap64*)&srbcmd->sg;
|
||
|
byte_count = 0;
|
||
|
|
||
|
/*
|
||
|
* This should also catch if user used the 32 bit sgmap
|
||
|
*/
|
||
|
actual_fibsize = sizeof(struct aac_srb) -
|
||
|
sizeof(struct sgentry) + ((srbcmd->sg.count & 0xff) *
|
||
|
sizeof(struct sgentry64));
|
||
|
if(actual_fibsize != fibsize){ // User made a mistake - should not continue
|
||
|
printk(KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n");
|
||
|
rcode = -EINVAL;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
if ((data_dir == DMA_NONE) && psg->count) {
|
||
|
printk(KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n");
|
||
|
rcode = -EINVAL;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < psg->count; i++) {
|
||
|
dma_addr_t addr;
|
||
|
u64 le_addr;
|
||
|
void* p;
|
||
|
p = kmalloc(psg->sg[i].count,GFP_KERNEL|__GFP_DMA);
|
||
|
if(p == 0) {
|
||
|
printk(KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
|
||
|
psg->sg[i].count,i,psg->count);
|
||
|
rcode = -ENOMEM;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
sg_user[i] = (void __user *)psg->sg[i].addr;
|
||
|
sg_list[i] = p; // save so we can clean up later
|
||
|
sg_indx = i;
|
||
|
|
||
|
if( flags & SRB_DataOut ){
|
||
|
if(copy_from_user(p,sg_user[i],psg->sg[i].count)){
|
||
|
printk(KERN_DEBUG"aacraid: Could not copy sg data from user\n");
|
||
|
rcode = -EFAULT;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
}
|
||
|
addr = pci_map_single(dev->pdev, p, psg->sg[i].count, data_dir);
|
||
|
|
||
|
le_addr = cpu_to_le64(addr);
|
||
|
psg->sg[i].addr[1] = (u32)(le_addr>>32);
|
||
|
psg->sg[i].addr[0] = (u32)(le_addr & 0xffffffff);
|
||
|
psg->sg[i].count = cpu_to_le32(psg->sg[i].count);
|
||
|
byte_count += psg->sg[i].count;
|
||
|
}
|
||
|
|
||
|
srbcmd->count = cpu_to_le32(byte_count);
|
||
|
status = fib_send(ScsiPortCommand64, srbfib, actual_fibsize, FsaNormal, 1, 1,NULL,NULL);
|
||
|
} else {
|
||
|
struct sgmap* psg = &srbcmd->sg;
|
||
|
byte_count = 0;
|
||
|
|
||
|
actual_fibsize = sizeof (struct aac_srb) +
|
||
|
(((le32_to_cpu(srbcmd->sg.count) & 0xff) - 1) *
|
||
|
sizeof (struct sgentry));
|
||
|
if(actual_fibsize != fibsize){ // User made a mistake - should not continue
|
||
|
printk(KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n");
|
||
|
rcode = -EINVAL;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
if ((data_dir == DMA_NONE) && psg->count) {
|
||
|
printk(KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n");
|
||
|
rcode = -EINVAL;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
for (i = 0; i < psg->count; i++) {
|
||
|
dma_addr_t addr;
|
||
|
void* p;
|
||
|
p = kmalloc(psg->sg[i].count,GFP_KERNEL);
|
||
|
if(p == 0) {
|
||
|
printk(KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
|
||
|
psg->sg[i].count,i,psg->count);
|
||
|
rcode = -ENOMEM;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
sg_user[i] = (void __user *)(psg->sg[i].addr);
|
||
|
sg_list[i] = p; // save so we can clean up later
|
||
|
sg_indx = i;
|
||
|
|
||
|
if( flags & SRB_DataOut ){
|
||
|
if(copy_from_user(p,sg_user[i],psg->sg[i].count)){
|
||
|
printk(KERN_DEBUG"aacraid: Could not copy sg data from user\n");
|
||
|
rcode = -EFAULT;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
}
|
||
|
addr = pci_map_single(dev->pdev, p, psg->sg[i].count, data_dir);
|
||
|
|
||
|
psg->sg[i].addr = cpu_to_le32(addr);
|
||
|
psg->sg[i].count = cpu_to_le32(psg->sg[i].count);
|
||
|
byte_count += psg->sg[i].count;
|
||
|
}
|
||
|
srbcmd->count = cpu_to_le32(byte_count);
|
||
|
status = fib_send(ScsiPortCommand, srbfib, actual_fibsize, FsaNormal, 1, 1, NULL, NULL);
|
||
|
}
|
||
|
|
||
|
if (status != 0){
|
||
|
printk(KERN_DEBUG"aacraid: Could not send raw srb fib to hba\n");
|
||
|
rcode = -1;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
|
||
|
if( flags & SRB_DataIn ) {
|
||
|
for(i = 0 ; i <= sg_indx; i++){
|
||
|
if(copy_to_user(sg_user[i],sg_list[i],le32_to_cpu(srbcmd->sg.sg[i].count))){
|
||
|
printk(KERN_DEBUG"aacraid: Could not copy sg data to user\n");
|
||
|
rcode = -EFAULT;
|
||
|
goto cleanup;
|
||
|
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
reply = (struct aac_srb_reply *) fib_data(srbfib);
|
||
|
if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
|
||
|
printk(KERN_DEBUG"aacraid: Could not copy reply to user\n");
|
||
|
rcode = -EFAULT;
|
||
|
goto cleanup;
|
||
|
}
|
||
|
|
||
|
cleanup:
|
||
|
for(i=0; i <= sg_indx; i++){
|
||
|
kfree(sg_list[i]);
|
||
|
}
|
||
|
fib_complete(srbfib);
|
||
|
fib_free(srbfib);
|
||
|
|
||
|
return rcode;
|
||
|
}
|
||
|
|
||
|
|
||
|
struct aac_pci_info {
|
||
|
u32 bus;
|
||
|
u32 slot;
|
||
|
};
|
||
|
|
||
|
|
||
|
int aac_get_pci_info(struct aac_dev* dev, void __user *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, &pci_info, sizeof(struct aac_pci_info))) {
|
||
|
printk(KERN_DEBUG "aacraid: Could not copy pci info\n");
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *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_SEND_RAW_SRB:
|
||
|
status = aac_send_raw_srb(dev,arg);
|
||
|
break;
|
||
|
case FSACTL_GET_PCI_INFO:
|
||
|
status = aac_get_pci_info(dev,arg);
|
||
|
break;
|
||
|
default:
|
||
|
status = -ENOTTY;
|
||
|
break;
|
||
|
}
|
||
|
return status;
|
||
|
}
|
||
|
|