comminit.c
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上传日期:2013-02-24
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- /*
- * 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;
- }
-