[SCSI] mptfusion: mptfc Adding Stub Driver - Fiber Channel

(1) mptfc.c: This driver is having module_init, module_exit, and probe.
(2) mptfc.c: Registering for Fibre Channel pci ids are done from this
module.
(3) mptfc.c: Convert MODULE_PARM to module_param

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 428 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
new file mode 100644
index 000000000000..91c79e525d3c
--- /dev/null
+++ b/drivers/message/fusion/mptfc.c
@@ -0,0 +1,428 @@
+/*
+ *  linux/drivers/message/fusion/mptfc.c
+ *      For use with LSI Logic PCI chip/adapter(s)
+ *      running LSI Logic Fusion MPT (Message Passing Technology) firmware.
+ *
+ *  Copyright (c) 1999-2005 LSI Logic Corporation
+ *  (mailto:mpt_linux_developer@lsil.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; version 2 of the License.
+
+    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.
+
+    NO WARRANTY
+    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+    solely responsible for determining the appropriateness of using and
+    distributing the Program and assumes all risks associated with its
+    exercise of rights under this Agreement, including but not limited to
+    the risks and costs of program errors, damage to or loss of data,
+    programs or equipment, and unavailability or interruption of operations.
+
+    DISCLAIMER OF LIABILITY
+    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+#include "linux_compat.h"       /* linux-2.6 tweaks */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kdev_t.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>        /* for mdelay */
+#include <linux/interrupt.h>    /* needed for in_interrupt() proto */
+#include <linux/reboot.h>       /* notifier code */
+#include <linux/sched.h>
+#include <linux/workqueue.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+
+#include "mptbase.h"
+#include "mptscsih.h"
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+#define my_NAME         "Fusion MPT FC Host driver"
+#define my_VERSION      MPT_LINUX_VERSION_COMMON
+#define MYNAM           "mptfc"
+
+MODULE_AUTHOR(MODULEAUTHOR);
+MODULE_DESCRIPTION(my_NAME);
+MODULE_LICENSE("GPL");
+
+/* Command line args */
+static int mpt_pq_filter = 0;
+module_param(mpt_pq_filter, int, 0);
+MODULE_PARM_DESC(mpt_pq_filter, " Enable peripheral qualifier filter: enable=1  (default=0)");
+
+static int      mptfcDoneCtx = -1;
+static int      mptfcTaskCtx = -1;
+static int      mptfcInternalCtx = -1; /* Used only for internal commands */
+
+static struct device_attribute mptfc_queue_depth_attr = {
+        .attr = {
+                .name =         "queue_depth",
+                .mode =         S_IWUSR,
+        },
+        .store = mptscsih_store_queue_depth,
+};
+
+static struct device_attribute *mptfc_dev_attrs[] = {
+        &mptfc_queue_depth_attr,
+        NULL,
+};
+
+static struct scsi_host_template mptfc_driver_template = {
+        .proc_name                      = "mptfc",
+        .proc_info                      = mptscsih_proc_info,
+        .name                           = "MPT FC Host",
+        .info                           = mptscsih_info,
+        .queuecommand                   = mptscsih_qcmd,
+        .slave_alloc                    = mptscsih_slave_alloc,
+        .slave_configure                = mptscsih_slave_configure,
+        .slave_destroy                  = mptscsih_slave_destroy,
+        .eh_abort_handler               = mptscsih_abort,
+        .eh_device_reset_handler        = mptscsih_dev_reset,
+        .eh_bus_reset_handler           = mptscsih_bus_reset,
+        .eh_host_reset_handler          = mptscsih_host_reset,
+        .bios_param                     = mptscsih_bios_param,
+        .can_queue                      = MPT_FC_CAN_QUEUE,
+        .this_id                        = -1,
+        .sg_tablesize                   = MPT_SCSI_SG_DEPTH,
+        .max_sectors                    = 8192,
+        .cmd_per_lun                    = 7,
+        .use_clustering                 = ENABLE_CLUSTERING,
+        .sdev_attrs                     = mptfc_dev_attrs,
+};
+
+/****************************************************************************
+ * Supported hardware
+ */
+
+static struct pci_device_id mptfc_pci_table[] = {
+        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FC909,
+                PCI_ANY_ID, PCI_ANY_ID },
+        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FC919,
+                PCI_ANY_ID, PCI_ANY_ID },
+        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FC929,
+                PCI_ANY_ID, PCI_ANY_ID },
+        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FC919X,
+                PCI_ANY_ID, PCI_ANY_ID },
+        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FC929X,
+                PCI_ANY_ID, PCI_ANY_ID },
+        {0}     /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(pci, mptfc_pci_table);
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/*
+ *      mptfc_probe - Installs scsi devices per bus.
+ *      @pdev: Pointer to pci_dev structure
+ *
+ *      Returns 0 for success, non-zero for failure.
+ *
+ */
+static int
+mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        struct Scsi_Host        *sh;
+        MPT_SCSI_HOST           *hd;
+        MPT_ADAPTER             *ioc;
+        unsigned long            flags;
+        int                      sz, ii;
+        int                      numSGE = 0;
+        int                      scale;
+        int                      ioc_cap;
+        u8                      *mem;
+        int                     error=0;
+        int                     r;
+                
+        if ((r = mpt_attach(pdev,id)) != 0)
+                return r;
+        
+        ioc = pci_get_drvdata(pdev);
+
+        /*  Added sanity check on readiness of the MPT adapter.
+         */
+        if (ioc->last_state != MPI_IOC_STATE_OPERATIONAL) {
+                printk(MYIOC_s_WARN_FMT
+                  "Skipping because it's not operational!\n",
+                  ioc->name);
+                return -ENODEV;
+        }
+
+        if (!ioc->active) {
+                printk(MYIOC_s_WARN_FMT "Skipping because it's disabled!\n",
+                  ioc->name);
+                return -ENODEV;
+        }
+
+        /*  Sanity check - ensure at least 1 port is INITIATOR capable
+         */
+        ioc_cap = 0;
+        for (ii=0; ii < ioc->facts.NumberOfPorts; ii++) {
+                if (ioc->pfacts[ii].ProtocolFlags &
+                    MPI_PORTFACTS_PROTOCOL_INITIATOR)
+                        ioc_cap ++;
+        }
+
+        if (!ioc_cap) {
+                printk(MYIOC_s_WARN_FMT
+                        "Skipping ioc=%p because SCSI Initiator mode is NOT enabled!\n",
+                        ioc->name, ioc);
+                return -ENODEV;
+        }
+
+        sh = scsi_host_alloc(&mptfc_driver_template, sizeof(MPT_SCSI_HOST));
+
+        if (!sh) {
+                printk(MYIOC_s_WARN_FMT
+                        "Unable to register controller with SCSI subsystem\n",
+                        ioc->name);
+                return -1;
+        }
+
+        spin_lock_irqsave(&ioc->FreeQlock, flags);
+
+        /* Attach the SCSI Host to the IOC structure
+         */
+        ioc->sh = sh;
+
+        sh->io_port = 0;
+        sh->n_io_port = 0;
+        sh->irq = 0;
+
+        /* set 16 byte cdb's */
+        sh->max_cmd_len = 16;
+
+        sh->max_id = MPT_MAX_FC_DEVICES<256 ? MPT_MAX_FC_DEVICES : 255;
+
+        sh->max_lun = MPT_LAST_LUN + 1;
+        sh->max_channel = 0;
+        sh->this_id = ioc->pfacts[0].PortSCSIID;
+
+        /* Required entry.
+         */
+        sh->unique_id = ioc->id;
+
+        /* Verify that we won't exceed the maximum
+         * number of chain buffers
+         * We can optimize:  ZZ = req_sz/sizeof(SGE)
+         * For 32bit SGE's:
+         *  numSGE = 1 + (ZZ-1)*(maxChain -1) + ZZ
+         *               + (req_sz - 64)/sizeof(SGE)
+         * A slightly different algorithm is required for
+         * 64bit SGEs.
+         */
+        scale = ioc->req_sz/(sizeof(dma_addr_t) + sizeof(u32));
+        if (sizeof(dma_addr_t) == sizeof(u64)) {
+                numSGE = (scale - 1) *
+                  (ioc->facts.MaxChainDepth-1) + scale +
+                  (ioc->req_sz - 60) / (sizeof(dma_addr_t) +
+                  sizeof(u32));
+        } else {
+                numSGE = 1 + (scale - 1) *
+                  (ioc->facts.MaxChainDepth-1) + scale +
+                  (ioc->req_sz - 64) / (sizeof(dma_addr_t) +
+                  sizeof(u32));
+        }
+
+        if (numSGE < sh->sg_tablesize) {
+                /* Reset this value */
+                dprintk((MYIOC_s_INFO_FMT
+                  "Resetting sg_tablesize to %d from %d\n",
+                  ioc->name, numSGE, sh->sg_tablesize));
+                sh->sg_tablesize = numSGE;
+        }
+
+        /* Set the pci device pointer in Scsi_Host structure.
+         */
+        scsi_set_device(sh, &ioc->pcidev->dev);
+
+        spin_unlock_irqrestore(&ioc->FreeQlock, flags);
+
+        hd = (MPT_SCSI_HOST *) sh->hostdata;
+        hd->ioc = ioc;
+
+        /* SCSI needs scsi_cmnd lookup table!
+         * (with size equal to req_depth*PtrSz!)
+         */
+        sz = ioc->req_depth * sizeof(void *);
+        mem = kmalloc(sz, GFP_ATOMIC);
+        if (mem == NULL) {
+                error = -ENOMEM;
+                goto mptfc_probe_failed;
+        }
+
+        memset(mem, 0, sz);
+        hd->ScsiLookup = (struct scsi_cmnd **) mem;
+
+        dprintk((MYIOC_s_INFO_FMT "ScsiLookup @ %p, sz=%d\n",
+                 ioc->name, hd->ScsiLookup, sz));
+
+        /* Allocate memory for the device structures.
+         * A non-Null pointer at an offset
+         * indicates a device exists.
+         * max_id = 1 + maximum id (hosts.h)
+         */
+        sz = sh->max_id * sizeof(void *);
+        mem = kmalloc(sz, GFP_ATOMIC);
+        if (mem == NULL) {
+                error = -ENOMEM;
+                goto mptfc_probe_failed;
+        }
+
+        memset(mem, 0, sz);
+        hd->Targets = (VirtDevice **) mem;
+
+        dprintk((KERN_INFO
+          "  Targets @ %p, sz=%d\n", hd->Targets, sz));
+
+        /* Clear the TM flags
+         */
+        hd->tmPending = 0;
+        hd->tmState = TM_STATE_NONE;
+        hd->resetPending = 0;
+        hd->abortSCpnt = NULL;
+
+        /* Clear the pointer used to store
+         * single-threaded commands, i.e., those
+         * issued during a bus scan, dv and
+         * configuration pages.
+         */
+        hd->cmdPtr = NULL;
+
+        /* Initialize this SCSI Hosts' timers
+         * To use, set the timer expires field
+         * and add_timer
+         */
+        init_timer(&hd->timer);
+        hd->timer.data = (unsigned long) hd;
+        hd->timer.function = mptscsih_timer_expired;
+
+        ioc->DoneCtx = mptfcDoneCtx;
+        ioc->TaskCtx = mptfcTaskCtx;
+        ioc->InternalCtx = mptfcInternalCtx;
+
+        hd->mpt_pq_filter = mpt_pq_filter;
+
+        ddvprintk((MYIOC_s_INFO_FMT
+                "mpt_pq_filter %x\n",
+                ioc->name, 
+                mpt_pq_filter));
+
+        init_waitqueue_head(&hd->scandv_waitq);
+        hd->scandv_wait_done = 0;
+        hd->last_queue_full = 0;
+
+        error = scsi_add_host (sh, &ioc->pcidev->dev);
+        if(error) {
+                dprintk((KERN_ERR MYNAM
+                  "scsi_add_host failed\n"));
+                goto mptfc_probe_failed;
+        }
+
+        scsi_scan_host(sh);
+        return 0;
+
+mptfc_probe_failed:
+
+        mptscsih_remove(pdev);
+        return error;
+}
+
+static struct pci_driver mptfc_driver = {
+        .name           = "mptfc",
+        .id_table       = mptfc_pci_table,
+        .probe          = mptfc_probe,
+        .remove         = __devexit_p(mptscsih_remove),
+        .driver         = {
+                .shutdown = mptscsih_shutdown,
+        },
+#ifdef CONFIG_PM
+        .suspend        = mptscsih_suspend,
+        .resume         = mptscsih_resume,
+#endif
+};
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/**
+ *      mptfc_init - Register MPT adapter(s) as SCSI host(s) with
+ *      linux scsi mid-layer.
+ *
+ *      Returns 0 for success, non-zero for failure.
+ */
+static int __init
+mptfc_init(void)
+{
+
+        show_mptmod_ver(my_NAME, my_VERSION);
+
+        mptfcDoneCtx = mpt_register(mptscsih_io_done, MPTFC_DRIVER);
+        mptfcTaskCtx = mpt_register(mptscsih_taskmgmt_complete, MPTFC_DRIVER);
+        mptfcInternalCtx = mpt_register(mptscsih_scandv_complete, MPTFC_DRIVER);
+
+        if (mpt_event_register(mptfcDoneCtx, mptscsih_event_process) == 0) {
+                devtprintk((KERN_INFO MYNAM
+                  ": Registered for IOC event notifications\n"));
+        }
+
+        if (mpt_reset_register(mptfcDoneCtx, mptscsih_ioc_reset) == 0) {
+                dprintk((KERN_INFO MYNAM
+                  ": Registered for IOC reset notifications\n"));
+        }
+
+        return pci_register_driver(&mptfc_driver);
+}
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/**
+ *      mptfc_exit - Unregisters MPT adapter(s)
+ *
+ */
+static void __exit
+mptfc_exit(void)
+{
+        pci_unregister_driver(&mptfc_driver);
+        
+        mpt_reset_deregister(mptfcDoneCtx);
+        dprintk((KERN_INFO MYNAM
+          ": Deregistered for IOC reset notifications\n"));
+
+        mpt_event_deregister(mptfcDoneCtx);
+        dprintk((KERN_INFO MYNAM
+          ": Deregistered for IOC event notifications\n"));
+
+        mpt_deregister(mptfcInternalCtx);
+        mpt_deregister(mptfcTaskCtx);
+        mpt_deregister(mptfcDoneCtx);
+}
+
+module_init(mptfc_init);
+module_exit(mptfc_exit);