patch-2.4.17 linux/drivers/scsi/aacraid/comminit.c

• Lines: 333
• Date: Fri Dec 21 16:40:32 2001
• Orig file: linux-2.4.16/drivers/scsi/aacraid/comminit.c
• Orig date: Thu Jan 1 00:00:00 1970

diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/drivers/scsi/aacraid/comminit.c linux/drivers/scsi/aacraid/comminit.c
@@ -0,0 +1,332 @@
+/*
+ *	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:
+ *  comminit.c
+ *
+ * Abstract: This supports the initialization of the host adapter commuication interface.
+ *    This is a platform dependent module for the pci cyclone board.
+ *
+ */
+
+#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/blk.h>
+#include <asm/semaphore.h>
+#include "scsi.h"
+#include "hosts.h"
+
+#include "aacraid.h"
+
+struct aac_common aac_config;
+
+static struct aac_dev *devices;
+
+static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
+{
+	unsigned char *base;
+	unsigned long size, align;
+	unsigned long fibsize = 4096;
+	unsigned long printfbufsiz = 256;
+	struct aac_init *init;
+	dma_addr_t phys;
+
+	size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
+
+	base = pci_alloc_consistent(dev->pdev, size, &phys);
+	if(base == NULL)
+	{
+		printk(KERN_ERR "aacraid: unable to create mapping.\n");
+		return 0;
+	}
+	dev->comm_addr  = (void *)base;
+	dev->comm_phys = phys;
+	dev->comm_size     = size;
+
+	dev->init = (struct aac_init *)(base + fibsize);
+	dev->init_pa = (struct aac_init *)(phys + fibsize);
+
+	init = dev->init;
+
+	init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
+	init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
+	init->fsrev = cpu_to_le32(dev->fsrev);
+
+	/*
+	 *	Adapter Fibs are the first thing allocated so that they
+	 *	start page aligned
+	 */
+	init->AdapterFibsVirtualAddress = cpu_to_le32(base);
+	init->AdapterFibsPhysicalAddress = cpu_to_le32(phys);
+	init->AdapterFibsSize = cpu_to_le32(fibsize);
+	init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
+
+	/*
+	 * Increment the base address by the amount already used
+	 */
+	base = base + fibsize + sizeof(struct aac_init);
+	phys = phys + fibsize + sizeof(struct aac_init);
+	/*
+	 *	Align the beginning of Headers to commalign
+	 */
+	align = (commalign - ((unsigned long)(base) & (commalign - 1)));
+	base = base + align;
+	phys = phys + align;
+	/*
+	 *	Fill in addresses of the Comm Area Headers and Queues
+	 */
+	*commaddr = (unsigned long *)base;
+	init->CommHeaderAddress = cpu_to_le32(phys);
+	/*
+	 *	Increment the base address by the size of the CommArea
+	 */
+	base = base + commsize;
+	phys = phys + commsize;
+	/*
+	 *	 Place the Printf buffer area after the Fast I/O comm area.
+	 */
+	dev->printfbuf = (void *)base;
+	init->printfbuf = cpu_to_le32(phys);
+	init->printfbufsiz = cpu_to_le32(printfbufsiz);
+	memset(base, 0, printfbufsiz);
+	return 1;
+}
+    
+static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
+{
+	q->numpending = 0;
+	q->dev = dev;
+	INIT_LIST_HEAD(&q->pendingq);
+	init_waitqueue_head(&q->cmdready);
+	INIT_LIST_HEAD(&q->cmdq);
+	init_waitqueue_head(&q->qfull);
+	spin_lock_init(&q->lockdata);
+	q->lock = &q->lockdata;
+	q->headers.producer = mem;
+	q->headers.consumer = mem+1;
+	*q->headers.producer = cpu_to_le32(qsize);
+	*q->headers.consumer = cpu_to_le32(qsize);
+	q->entries = qsize;
+}
+
+/**
+ *	aac_send_shutdown		-	shutdown an adapter
+ *	@dev: Adapter to shutdown
+ *
+ *	This routine will send a VM_CloseAll (shutdown) request to the adapter.
+ */
+
+static int aac_send_shutdown(struct aac_dev * dev)
+{
+	struct fib * fibctx;
+	struct aac_close *cmd;
+	int status;
+
+	fibctx = fib_alloc(dev);
+	fib_init(fibctx);
+
+	cmd = (struct aac_close *) fib_data(fibctx);
+
+	cmd->command = cpu_to_le32(VM_CloseAll);
+	cmd->cid = cpu_to_le32(0xffffffff);
+
+	status = fib_send(ContainerCommand,
+			  fibctx,
+			  sizeof(struct aac_close),
+			  FsaNormal,
+			  1, 1,
+			  NULL, NULL);
+
+	if (status == 0)
+		fib_complete(fibctx);
+	fib_free(fibctx);
+	return status;
+}
+
+/**
+ *	aac_detach	-	detach adapter
+ *	@detach: adapter to disconnect
+ *
+ *	Disconnect and shutdown an AAC based adapter, freeing resources
+ *	as we go.
+ */
+
+int aac_detach(struct aac_dev *detach)
+{
+	struct aac_dev **dev = &devices;
+	
+	while(*dev)
+	{
+		if(*dev == detach)
+		{
+			*dev = detach->next;
+			aac_send_shutdown(detach);
+			fib_map_free(detach);
+			pci_free_consistent(detach->pdev, detach->comm_size, detach->comm_addr, detach->comm_phys);
+			kfree(detach->queues);
+			return 1;
+		}
+		dev=&((*dev)->next);
+	}
+	BUG();
+	return 0;
+}
+
+/**
+ *	aac_comm_init	-	Initialise FSA data structures
+ *	@dev:	Adapter to intialise
+ *
+ *	Initializes the data structures that are required for the FSA commuication
+ *	interface to operate. 
+ *	Returns
+ *		1 - if we were able to init the commuication interface.
+ *		0 - If there were errors initing. This is a fatal error.
+ */
+ 
+int aac_comm_init(struct aac_dev * dev)
+{
+	unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
+	unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
+	u32 *headers;
+	struct aac_entry * queues;
+	unsigned long size;
+	struct aac_queue_block * comm = dev->queues;
+
+	/*
+	 *	Now allocate and initialize the zone structures used as our 
+	 *	pool of FIB context records.  The size of the zone is based
+	 *	on the system memory size.  We also initialize the mutex used
+	 *	to protect the zone.
+	 */
+	spin_lock_init(&dev->fib_lock);
+
+	/*
+	 *	Allocate the physically contigous space for the commuication
+	 *	queue headers. 
+	 */
+
+	size = hdrsize + queuesize;
+
+	if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
+		return -ENOMEM;
+
+	queues = (struct aac_entry *)((unsigned char *)headers + hdrsize);
+
+	/* Adapter to Host normal priority Command queue */ 
+	comm->queue[HostNormCmdQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
+	queues += HOST_NORM_CMD_ENTRIES;
+	headers += 2;
+
+	/* Adapter to Host high priority command queue */
+	comm->queue[HostHighCmdQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
+    
+	queues += HOST_HIGH_CMD_ENTRIES;
+	headers +=2;
+
+	/* Host to adapter normal priority command queue */
+	comm->queue[AdapNormCmdQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
+    
+	queues += ADAP_NORM_CMD_ENTRIES;
+	headers += 2;
+
+	/* host to adapter high priority command queue */
+	comm->queue[AdapHighCmdQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
+    
+	queues += ADAP_HIGH_CMD_ENTRIES;
+	headers += 2;
+
+	/* adapter to host normal priority response queue */
+	comm->queue[HostNormRespQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
+    
+	queues += HOST_NORM_RESP_ENTRIES;
+	headers += 2;
+
+	/* adapter to host high priority response queue */
+	comm->queue[HostHighRespQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
+   
+	queues += HOST_HIGH_RESP_ENTRIES;
+	headers += 2;
+
+	/* host to adapter normal priority response queue */
+	comm->queue[AdapNormRespQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
+
+	queues += ADAP_NORM_RESP_ENTRIES;
+	headers += 2;
+	
+	/* host to adapter high priority response queue */ 
+	comm->queue[AdapHighRespQueue].base = queues;
+	aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
+
+	comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
+	comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
+	comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
+	comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
+
+	return 0;
+}
+
+struct aac_dev *aac_init_adapter(struct aac_dev *dev)
+{
+	/*
+	 *	Ok now init the communication subsystem
+	 */
+	dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
+	if (dev->queues == NULL) {
+		printk(KERN_ERR "Error could not allocate comm region.\n");
+		return NULL;
+	}
+	memset(dev->queues, 0, sizeof(struct aac_queue_block));
+
+	if (aac_comm_init(dev)<0)
+		return NULL;
+	/*
+	 *	Initialize the list of fibs
+	 */
+	if(fib_setup(dev)<0)
+		return NULL;
+		
+	INIT_LIST_HEAD(&dev->fib_list);
+	spin_lock_init(&dev->fib_lock);
+	init_completion(&dev->aif_completion);
+	/*
+	 *	Add this adapter in to our dev List.
+	 */
+	dev->next = devices;
+	devices = dev;
+	return dev;
+}
+
+