--- /dev/null
+/*
+ * Adaptec AAC series RAID controller driver
+ * (c) Copyright 2001 Red Hat Inc.
+ *
+ * based on the old aacraid driver that is..
+ * Adaptec aacraid device driver for Linux.
+ *
+ * Copyright (c) 2000-2010 Adaptec, Inc.
+ * 2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.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/pci.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/completion.h>
+#include <linux/mm.h>
+#include <scsi/scsi_host.h>
+
+#include "aacraid.h"
+
+static void aac_define_int_mode(struct aac_dev *dev);
+
+struct aac_common aac_config = {
+ .irq_mod = 1
+};
+
+static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
+{
+ unsigned char *base;
+ unsigned long size, align;
+ const unsigned long fibsize = dev->max_fib_size;
+ const unsigned long printfbufsiz = 256;
+ unsigned long host_rrq_size = 0;
+ struct aac_init *init;
+ dma_addr_t phys;
+ unsigned long aac_max_hostphysmempages;
+
+ if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
+ dev->comm_interface == AAC_COMM_MESSAGE_TYPE2)
+ host_rrq_size = (dev->scsi_host_ptr->can_queue
+ + AAC_NUM_MGT_FIB) * sizeof(u32);
+ size = fibsize + sizeof(struct aac_init) + commsize +
+ commalign + printfbufsiz + host_rrq_size;
+
+ 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;
+
+ if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
+ dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
+ dev->host_rrq = (u32 *)(base + fibsize);
+ dev->host_rrq_pa = phys + fibsize;
+ memset(dev->host_rrq, 0, host_rrq_size);
+ }
+
+ dev->init = (struct aac_init *)(base + fibsize + host_rrq_size);
+ dev->init_pa = phys + fibsize + host_rrq_size;
+
+ init = dev->init;
+
+ init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
+ if (dev->max_fib_size != sizeof(struct hw_fib))
+ init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
+ init->Sa_MSIXVectors = 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. 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.
+ */
+ aac_max_hostphysmempages = dma_get_required_mask(&dev->pdev->dev) >> 12;
+ if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
+ init->HostPhysMemPages = cpu_to_le32(aac_max_hostphysmempages);
+ else
+ init->HostPhysMemPages = cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);
+
+ init->InitFlags = cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
+ INITFLAGS_DRIVER_SUPPORTS_PM);
+ init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
+ init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
+ init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
+ init->MaxNumAif = cpu_to_le32(dev->max_num_aif);
+
+ if (dev->comm_interface == AAC_COMM_MESSAGE) {
+ init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
+ dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
+ } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
+ init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
+ init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
+ INITFLAGS_NEW_COMM_TYPE1_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
+ init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
+ init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
+ dprintk((KERN_WARNING"aacraid: New Comm Interface type1 enabled\n"));
+ } else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
+ init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
+ init->InitFlags |= cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
+ INITFLAGS_NEW_COMM_TYPE2_SUPPORTED | INITFLAGS_FAST_JBOD_SUPPORTED);
+ init->HostRRQ_AddrHigh = cpu_to_le32((u32)((u64)dev->host_rrq_pa >> 32));
+ init->HostRRQ_AddrLow = cpu_to_le32((u32)(dev->host_rrq_pa & 0xffffffff));
+ /* number of MSI-X */
+ init->Sa_MSIXVectors = cpu_to_le32(dev->max_msix);
+ dprintk((KERN_WARNING"aacraid: New Comm Interface type2 enabled\n"));
+ }
+
+ /*
+ * Increment the base address by the amount already used
+ */
+ base = base + fibsize + host_rrq_size + sizeof(struct aac_init);
+ phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
+ sizeof(struct aac_init));
+
+ /*
+ * Align the beginning of Headers to commalign
+ */
+ align = (commalign - ((uintptr_t)(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)
+{
+ atomic_set(&q->numpending, 0);
+ q->dev = dev;
+ 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 = (__le32 *)mem;
+ q->headers.consumer = (__le32 *)(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 = aac_fib_alloc(dev);
+ if (!fibctx)
+ return -ENOMEM;
+ aac_fib_init(fibctx);
+
+ cmd = (struct aac_close *) fib_data(fibctx);
+
+ cmd->command = cpu_to_le32(VM_CloseAll);
+ cmd->cid = cpu_to_le32(0xfffffffe);
+
+ status = aac_fib_send(ContainerCommand,
+ fibctx,
+ sizeof(struct aac_close),
+ FsaNormal,
+ -2 /* Timeout silently */, 1,
+ NULL, NULL);
+
+ if (status >= 0)
+ aac_fib_complete(fibctx);
+ /* FIB should be freed only after getting the response from the F/W */
+ if (status != -ERESTARTSYS)
+ aac_fib_free(fibctx);
+ dev->adapter_shutdown = 1;
+ if ((dev->pdev->device == PMC_DEVICE_S7 ||
+ dev->pdev->device == PMC_DEVICE_S8 ||
+ dev->pdev->device == PMC_DEVICE_S9) &&
+ dev->msi_enabled)
+ aac_src_access_devreg(dev, AAC_ENABLE_INTX);
+ 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.
+ */
+
+static 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 contiguous 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)
+{
+ u32 status[5];
+ struct Scsi_Host * host = dev->scsi_host_ptr;
+ extern int aac_sync_mode;
+
+ /*
+ * Check the preferred comm settings, defaults from template.
+ */
+ dev->management_fib_count = 0;
+ spin_lock_init(&dev->manage_lock);
+ spin_lock_init(&dev->sync_lock);
+ dev->max_fib_size = sizeof(struct hw_fib);
+ dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
+ - sizeof(struct aac_fibhdr)
+ - sizeof(struct aac_write) + sizeof(struct sgentry))
+ / sizeof(struct sgentry);
+ dev->comm_interface = AAC_COMM_PRODUCER;
+ dev->raw_io_interface = dev->raw_io_64 = 0;
+
+ if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
+ 0, 0, 0, 0, 0, 0,
+ status+0, status+1, status+2, status+3, NULL)) &&
+ (status[0] == 0x00000001)) {
+ dev->doorbell_mask = status[3];
+ if (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_64))
+ dev->raw_io_64 = 1;
+ dev->sync_mode = aac_sync_mode;
+ if (dev->a_ops.adapter_comm &&
+ (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM))) {
+ dev->comm_interface = AAC_COMM_MESSAGE;
+ dev->raw_io_interface = 1;
+ if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE1))) {
+ /* driver supports TYPE1 (Tupelo) */
+ dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
+ } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE2))) {
+ /* driver supports TYPE2 (Denali) */
+ dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
+ } else if ((status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE4)) ||
+ (status[1] & le32_to_cpu(AAC_OPT_NEW_COMM_TYPE3))) {
+ /* driver doesn't TYPE3 and TYPE4 */
+ /* switch to sync. mode */
+ dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
+ dev->sync_mode = 1;
+ }
+ }
+ if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
+ (status[2] > dev->base_size)) {
+ aac_adapter_ioremap(dev, 0);
+ dev->base_size = status[2];
+ if (aac_adapter_ioremap(dev, status[2])) {
+ /* remap failed, go back ... */
+ dev->comm_interface = AAC_COMM_PRODUCER;
+ if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
+ printk(KERN_WARNING
+ "aacraid: unable to map adapter.\n");
+ return NULL;
+ }
+ }
+ }
+ }
+ dev->max_msix = 0;
+ dev->msi_enabled = 0;
+ dev->adapter_shutdown = 0;
+ if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
+ 0, 0, 0, 0, 0, 0,
+ status+0, status+1, status+2, status+3, status+4))
+ && (status[0] == 0x00000001)) {
+ /*
+ * status[1] >> 16 maximum command size in KB
+ * status[1] & 0xFFFF maximum FIB size
+ * status[2] >> 16 maximum SG elements to driver
+ * status[2] & 0xFFFF maximum SG elements from driver
+ * status[3] & 0xFFFF maximum number FIBs outstanding
+ */
+ host->max_sectors = (status[1] >> 16) << 1;
+ /* Multiple of 32 for PMC */
+ dev->max_fib_size = status[1] & 0xFFE0;
+ host->sg_tablesize = status[2] >> 16;
+ dev->sg_tablesize = status[2] & 0xFFFF;
+ if (dev->pdev->device == PMC_DEVICE_S7 ||
+ dev->pdev->device == PMC_DEVICE_S8 ||
+ dev->pdev->device == PMC_DEVICE_S9)
+ host->can_queue = ((status[3] >> 16) ? (status[3] >> 16) :
+ (status[3] & 0xFFFF)) - AAC_NUM_MGT_FIB;
+ else
+ host->can_queue = (status[3] & 0xFFFF) - AAC_NUM_MGT_FIB;
+ dev->max_num_aif = status[4] & 0xFFFF;
+ /*
+ * NOTE:
+ * All these overrides are based on a fixed internal
+ * knowledge and understanding of existing adapters,
+ * acbsize should be set with caution.
+ */
+ if (acbsize == 512) {
+ host->max_sectors = AAC_MAX_32BIT_SGBCOUNT;
+ dev->max_fib_size = 512;
+ dev->sg_tablesize = host->sg_tablesize
+ = (512 - sizeof(struct aac_fibhdr)
+ - sizeof(struct aac_write) + sizeof(struct sgentry))
+ / sizeof(struct sgentry);
+ host->can_queue = AAC_NUM_IO_FIB;
+ } else if (acbsize == 2048) {
+ host->max_sectors = 512;
+ dev->max_fib_size = 2048;
+ host->sg_tablesize = 65;
+ dev->sg_tablesize = 81;
+ host->can_queue = 512 - AAC_NUM_MGT_FIB;
+ } else if (acbsize == 4096) {
+ host->max_sectors = 1024;
+ dev->max_fib_size = 4096;
+ host->sg_tablesize = 129;
+ dev->sg_tablesize = 166;
+ host->can_queue = 256 - AAC_NUM_MGT_FIB;
+ } else if (acbsize == 8192) {
+ host->max_sectors = 2048;
+ dev->max_fib_size = 8192;
+ host->sg_tablesize = 257;
+ dev->sg_tablesize = 337;
+ host->can_queue = 128 - AAC_NUM_MGT_FIB;
+ } else if (acbsize > 0) {
+ printk("Illegal acbsize=%d ignored\n", acbsize);
+ }
+ }
+ {
+
+ if (numacb > 0) {
+ if (numacb < host->can_queue)
+ host->can_queue = numacb;
+ else
+ printk("numacb=%d ignored\n", numacb);
+ }
+ }
+
+ if (host->can_queue > AAC_NUM_IO_FIB)
+ host->can_queue = AAC_NUM_IO_FIB;
+
+ if (dev->pdev->device == PMC_DEVICE_S6 ||
+ dev->pdev->device == PMC_DEVICE_S7 ||
+ dev->pdev->device == PMC_DEVICE_S8 ||
+ dev->pdev->device == PMC_DEVICE_S9)
+ aac_define_int_mode(dev);
+ /*
+ * Ok now init the communication subsystem
+ */
+
+ dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
+ if (dev->queues == NULL) {
+ printk(KERN_ERR "Error could not allocate comm region.\n");
+ return NULL;
+ }
+
+ if (aac_comm_init(dev)<0){
+ kfree(dev->queues);
+ return NULL;
+ }
+ /*
+ * Initialize the list of fibs
+ */
+ if (aac_fib_setup(dev) < 0) {
+ kfree(dev->queues);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&dev->fib_list);
+ INIT_LIST_HEAD(&dev->sync_fib_list);
+
+ return dev;
+}
+
+static void aac_define_int_mode(struct aac_dev *dev)
+{
+
+ int i, msi_count;
+
+ msi_count = i = 0;
+ /* max. vectors from GET_COMM_PREFERRED_SETTINGS */
+ if (dev->max_msix == 0 ||
+ dev->pdev->device == PMC_DEVICE_S6 ||
+ dev->sync_mode) {
+ dev->max_msix = 1;
+ dev->vector_cap =
+ dev->scsi_host_ptr->can_queue +
+ AAC_NUM_MGT_FIB;
+ return;
+ }
+
+ msi_count = min(dev->max_msix,
+ (unsigned int)num_online_cpus());
+
+ dev->max_msix = msi_count;
+
+ if (msi_count > AAC_MAX_MSIX)
+ msi_count = AAC_MAX_MSIX;
+
+ for (i = 0; i < msi_count; i++)
+ dev->msixentry[i].entry = i;
+
+ if (msi_count > 1 &&
+ pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
+ i = pci_enable_msix(dev->pdev,
+ dev->msixentry,
+ msi_count);
+ /* Check how many MSIX vectors are allocated */
+ if (i >= 0) {
+ dev->msi_enabled = 1;
+ if (i) {
+ msi_count = i;
+ if (pci_enable_msix(dev->pdev,
+ dev->msixentry,
+ msi_count)) {
+ dev->msi_enabled = 0;
+ printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+ } else {
+ dev->msi_enabled = 0;
+ printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+
+ if (!dev->msi_enabled) {
+ msi_count = 1;
+ i = pci_enable_msi(dev->pdev);
+
+ if (!i) {
+ dev->msi_enabled = 1;
+ dev->msi = 1;
+ } else {
+ printk(KERN_ERR "%s%d: MSI not supported!! Will try INTx 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+
+ if (!dev->msi_enabled)
+ dev->max_msix = msi_count = 1;
+ else {
+ if (dev->max_msix > msi_count)
+ dev->max_msix = msi_count;
+ }
+ dev->vector_cap =
+ (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) /
+ msi_count;
+}
Code Review / kvmfornfv.git / blobdiff