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path: root/drivers/scsi/aacraid/comminit.c
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Diffstat (limited to 'drivers/scsi/aacraid/comminit.c')
-rw-r--r--drivers/scsi/aacraid/comminit.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
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index 000000000000..6832a55ca907
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+++ b/drivers/scsi/aacraid/comminit.c
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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/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/blkdev.h>
+#include <linux/completion.h>
+#include <linux/mm.h>
+#include <asm/semaphore.h>
+
+#include "aacraid.h"
+
+struct aac_common aac_config;
+
+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 = 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
+ */
+ dev->aif_base_va = (struct hw_fib *)base;
+
+ init->AdapterFibsVirtualAddress = 0;
+ init->AdapterFibsPhysicalAddress = cpu_to_le32((u32)phys);
+ init->AdapterFibsSize = cpu_to_le32(fibsize);
+ init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
+ /*
+ * number of 4k pages of host physical memory. The aacraid fw needs
+ * this number to be less than 4gb worth of pages. num_physpages is in
+ * system page units. New firmware doesn't have any issues with the
+ * mapping system, but older Firmware did, and had *troubles* dealing
+ * with the math overloading past 32 bits, thus we must limit this
+ * field.
+ *
+ * This assumes the memory is mapped zero->n, which isnt
+ * always true on real computers. It also has some slight problems
+ * with the GART on x86-64. I've btw never tried DMA from PCI space
+ * on this platform but don't be suprised if its problematic.
+ */
+#ifndef CONFIG_GART_IOMMU
+ if ((num_physpages << (PAGE_SHIFT - 12)) <= AAC_MAX_HOSTPHYSMEMPAGES) {
+ init->HostPhysMemPages =
+ cpu_to_le32(num_physpages << (PAGE_SHIFT-12));
+ } else
+#endif
+ {
+ init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
+ }
+
+
+ /*
+ * Increment the base address by the amount already used
+ */
+ base = base + fibsize + sizeof(struct aac_init);
+ phys = (dma_addr_t)((ulong)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 = base;
+ init->CommHeaderAddress = cpu_to_le32((u32)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.
+ */
+
+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_comm_init - Initialise FSA data structures
+ * @dev: Adapter to initialise
+ *
+ * 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 *)(((ulong)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){
+ kfree(dev->queues);
+ return NULL;
+ }
+ /*
+ * Initialize the list of fibs
+ */
+ if(fib_setup(dev)<0){
+ kfree(dev->queues);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&dev->fib_list);
+ init_completion(&dev->aif_completion);
+
+ return dev;
+}
+
+