Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 683 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
new file mode 100644
index 00000000000..30dd1f7120f
--- /dev/null
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -0,0 +1,683 @@
+/*
+ *	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/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/dma-mapping.h>
+#include <linux/blkdev.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.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 __user *arg)
+{
+	struct hw_fib * kfib;
+	struct fib *fibptr;
+
+	fibptr = fib_alloc(dev);
+	if(fibptr == NULL)
+		return -ENOMEM;
+		
+	kfib = fibptr->hw_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 (le16_to_cpu(kfib->header.Size) > 
+			sizeof(struct hw_fib) - sizeof(struct aac_fibhdr)) {
+		fib_free(fibptr);
+		return -EINVAL;
+	}
+
+	if (copy_from_user(kfib, arg, le16_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 {
+		int retval = fib_send(kfib->header.Command, fibptr,
+				le16_to_cpu(kfib->header.Size) , FsaNormal,
+				1, 1, NULL, NULL);
+		if (retval) {
+			fib_free(fibptr);
+			return retval;
+		}
+		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 __user *arg)
+{
+	struct aac_fib_context * fibctx;
+	int status;
+
+	fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
+	if (fibctx == NULL) {
+		status = -ENOMEM;
+	} else {
+		unsigned long flags;
+		struct list_head * entry;
+		struct aac_fib_context * context;
+
+		fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
+		fibctx->size = sizeof(struct aac_fib_context);
+ 		/*
+		 *	Yes yes, I know this could be an index, but we have a
+		 * better guarantee of uniqueness for the locked loop below.
+		 * Without the aid of a persistent history, this also helps
+		 * reduce the chance that the opaque context would be reused.
+		 */
+		fibctx->unique = (u32)((ulong)fibctx & 0xFFFFFFFF);
+		/*
+		 *	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->fib_list);
+		fibctx->jiffies = jiffies/HZ;
+		/*
+		 *	Now add this context onto the adapter's 
+		 *	AdapterFibContext list.
+		 */
+		spin_lock_irqsave(&dev->fib_lock, flags);
+		/* Ensure that we have a unique identifier */
+		entry = dev->fib_list.next;
+		while (entry != &dev->fib_list) {
+			context = list_entry(entry, struct aac_fib_context, next);
+			if (context->unique == fibctx->unique) {
+				/* Not unique (32 bits) */
+				fibctx->unique++;
+				entry = dev->fib_list.next;
+			} else {
+				entry = entry->next;
+			}
+		}
+		list_add_tail(&fibctx->next, &dev->fib_list);
+		spin_unlock_irqrestore(&dev->fib_lock, flags);
+		if (copy_to_user(arg,  &fibctx->unique, 
+						sizeof(fibctx->unique))) {
+			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 __user *arg)
+{
+	struct fib_ioctl f;
+	struct fib *fib;
+	struct aac_fib_context *fibctx;
+	int status;
+	struct list_head * entry;
+	unsigned long flags;
+	
+	if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
+		return -EFAULT;
+	/*
+	 *	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
+	 */
+	entry = dev->fib_list.next;
+	fibctx = NULL;
+
+	while (entry != &dev->fib_list) {
+		fibctx = list_entry(entry, struct aac_fib_context, next);
+		/*
+		 *	Extract the AdapterFibContext from the Input parameters.
+		 */
+		if (fibctx->unique == f.fibctx) {   /* We found a winner */
+			break;
+		}
+		entry = entry->next;
+		fibctx = NULL;
+	}
+	if (!fibctx) {
+		dprintk ((KERN_INFO "Fib Context not found\n"));
+		return -EINVAL;
+	}
+
+	if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
+		 (fibctx->size != sizeof(struct aac_fib_context))) {
+		dprintk ((KERN_INFO "Fib Context corrupt?\n"));
+		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->fib_list)) {
+		struct list_head * entry;
+		/*
+		 *	Pull the next fib from the fibs
+		 */
+		entry = fibctx->fib_list.next;
+		list_del(entry);
+		
+		fib = list_entry(entry, struct fib, fiblink);
+		fibctx->count--;
+		spin_unlock_irqrestore(&dev->fib_lock, flags);
+		if (copy_to_user(f.fib, fib->hw_fib, sizeof(struct hw_fib))) {
+			kfree(fib->hw_fib);
+			kfree(fib);
+			return -EFAULT;
+		}	
+		/*
+		 *	Free the space occupied by this copy of the fib.
+		 */
+		kfree(fib->hw_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 fib *fib;
+
+	/*
+	 *	First free any FIBs that have not been consumed.
+	 */
+	while (!list_empty(&fibctx->fib_list)) {
+		struct list_head * entry;
+		/*
+		 *	Pull the next fib from the fibs
+		 */
+		entry = fibctx->fib_list.next;
+		list_del(entry);
+		fib = list_entry(entry, struct fib, fiblink);
+		fibctx->count--;
+		/*
+		 *	Free the space occupied by this copy of the fib.
+		 */
+		kfree(fib->hw_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 __user *arg)
+{
+	struct aac_fib_context *fibctx;
+	int status;
+	unsigned long flags;
+	struct list_head * entry;
+
+	/*
+	 *	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
+	 */
+
+	entry = dev->fib_list.next;
+	fibctx = NULL;
+
+	while(entry != &dev->fib_list) {
+		fibctx = list_entry(entry, struct aac_fib_context, next);
+		/*
+		 *	Extract the fibctx from the input parameters
+		 */
+		if (fibctx->unique == (u32)(unsigned long)arg) {   
+			/* We found a winner */
+			break;
+		}
+		entry = entry->next;
+		fibctx = NULL;
+	}
+
+	if (!fibctx)
+		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 driver version.
+ *      Under Linux, there have been no version incompatibilities, so this is 
+ *      simple!
+ */
+
+static int check_revision(struct aac_dev *dev, void __user *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;
+}
+
+/**
+ *
+ * aac_send_raw_scb
+ *
+ */
+
+int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
+{
+	struct fib* srbfib;
+	int status;
+	struct aac_srb *srbcmd;
+	struct aac_srb __user *user_srb = arg;
+	struct aac_srb_reply __user *user_reply;
+	struct aac_srb_reply* reply;
+	u32 fibsize = 0;
+	u32 flags = 0;
+	s32 rcode = 0;
+	u32 data_dir;
+	void __user *sg_user[32];
+	void *sg_list[32];
+	u32   sg_indx = 0;
+	u32 byte_count = 0;
+	u32 actual_fibsize = 0;
+	int i;
+
+
+	if (!capable(CAP_SYS_ADMIN)){
+		printk(KERN_DEBUG"aacraid: No permission to send raw srb\n"); 
+		return -EPERM;
+	}
+	/*
+	 *	Allocate and initialize a Fib then setup a BlockWrite command
+	 */
+	if (!(srbfib = fib_alloc(dev))) {
+		return -1;
+	}
+	fib_init(srbfib);
+
+	srbcmd = (struct aac_srb*) fib_data(srbfib);
+
+	if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
+		printk(KERN_DEBUG"aacraid: Could not copy data size from user\n"); 
+		rcode = -EFAULT;
+		goto cleanup;
+	}
+
+	if (fibsize > FIB_DATA_SIZE_IN_BYTES) {
+		rcode = -EINVAL;
+		goto cleanup;
+	}
+
+	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;
+}
+