[PATCH] qla2xxx: add remote port codes...

Add initial support for FC remote port infrastructure.

     o Use fc_remote_port...() registration and block/unlock
       functions.
     o Consolidate 'attribute' (fc-remote/sysfs) helpers into
       new qla_attr.c file.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 323 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
new file mode 100644
index 000000000000..0105b609ff3a
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -0,0 +1,323 @@
+/*
+ *                  QLOGIC LINUX SOFTWARE
+ *
+ * QLogic ISP2x00 device driver for Linux 2.6.x
+ * Copyright (C) 2003-2005 QLogic Corporation
+ * (www.qlogic.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.
+ *
+ */
+#include "qla_def.h"
+
+#include <linux/version.h>
+#include <scsi/scsi_transport_fc.h>
+
+/* SYSFS attributes --------------------------------------------------------- */
+
+static ssize_t
+qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+
+        if (ha->fw_dump_reading == 0)
+                return 0;
+        if (off > ha->fw_dump_buffer_len)
+                return 0;
+        if (off + count > ha->fw_dump_buffer_len)
+                count = ha->fw_dump_buffer_len - off;
+
+        memcpy(buf, &ha->fw_dump_buffer[off], count);
+
+        return (count);
+}
+
+static ssize_t
+qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        int reading;
+        uint32_t dump_size;
+
+        if (off != 0)
+                return (0);
+
+        reading = simple_strtol(buf, NULL, 10);
+        switch (reading) {
+        case 0:
+                if (ha->fw_dump_reading == 1) {
+                        qla_printk(KERN_INFO, ha,
+                            "Firmware dump cleared on (%ld).\n",
+                            ha->host_no);
+
+                        vfree(ha->fw_dump_buffer);
+                        free_pages((unsigned long)ha->fw_dump,
+                            ha->fw_dump_order);
+
+                        ha->fw_dump_reading = 0;
+                        ha->fw_dump_buffer = NULL;
+                        ha->fw_dump = NULL;
+                }
+                break;
+        case 1:
+                if (ha->fw_dump != NULL && !ha->fw_dump_reading) {
+                        ha->fw_dump_reading = 1;
+
+                        dump_size = FW_DUMP_SIZE_1M;
+                        if (ha->fw_memory_size < 0x20000) 
+                                dump_size = FW_DUMP_SIZE_128K;
+                        else if (ha->fw_memory_size < 0x80000) 
+                                dump_size = FW_DUMP_SIZE_512K;
+                        ha->fw_dump_buffer = (char *)vmalloc(dump_size);
+                        if (ha->fw_dump_buffer == NULL) {
+                                qla_printk(KERN_WARNING, ha,
+                                    "Unable to allocate memory for firmware "
+                                    "dump buffer (%d).\n", dump_size);
+
+                                ha->fw_dump_reading = 0;
+                                return (count);
+                        }
+                        qla_printk(KERN_INFO, ha,
+                            "Firmware dump ready for read on (%ld).\n",
+                            ha->host_no);
+                        memset(ha->fw_dump_buffer, 0, dump_size);
+                        if (IS_QLA2100(ha) || IS_QLA2200(ha))
+                                qla2100_ascii_fw_dump(ha);
+                        else
+                                qla2300_ascii_fw_dump(ha);
+                        ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
+                }
+                break;
+        }
+        return (count);
+}
+
+static struct bin_attribute sysfs_fw_dump_attr = {
+        .attr = {
+                .name = "fw_dump",
+                .mode = S_IRUSR | S_IWUSR,
+                .owner = THIS_MODULE,
+        },
+        .size = 0,
+        .read = qla2x00_sysfs_read_fw_dump,
+        .write = qla2x00_sysfs_write_fw_dump,
+};
+
+static ssize_t
+qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        uint16_t        *witer;
+        unsigned long   flags;
+        uint16_t        cnt;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
+                return 0;
+
+        /* Read NVRAM. */
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        qla2x00_lock_nvram_access(ha);
+        witer = (uint16_t *)buf;
+        for (cnt = 0; cnt < count / 2; cnt++) {
+                *witer = cpu_to_le16(qla2x00_get_nvram_word(ha,
+                    cnt+ha->nvram_base));
+                witer++;
+        }
+        qla2x00_unlock_nvram_access(ha);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        return (count);
+}
+
+static ssize_t
+qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        uint8_t         *iter;
+        uint16_t        *witer;
+        unsigned long   flags;
+        uint16_t        cnt;
+        uint8_t         chksum;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
+                return 0;
+
+        /* Checksum NVRAM. */
+        iter = (uint8_t *)buf;
+        chksum = 0;
+        for (cnt = 0; cnt < count - 1; cnt++)
+                chksum += *iter++;
+        chksum = ~chksum + 1;
+        *iter = chksum;
+
+        /* Write NVRAM. */
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        qla2x00_lock_nvram_access(ha);
+        qla2x00_release_nvram_protection(ha);
+        witer = (uint16_t *)buf;
+        for (cnt = 0; cnt < count / 2; cnt++) {
+                qla2x00_write_nvram_word(ha, cnt+ha->nvram_base,
+                    cpu_to_le16(*witer));
+                witer++;
+        }
+        qla2x00_unlock_nvram_access(ha);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        return (count);
+}
+
+static struct bin_attribute sysfs_nvram_attr = {
+        .attr = {
+                .name = "nvram",
+                .mode = S_IRUSR | S_IWUSR,
+                .owner = THIS_MODULE,
+        },
+        .size = sizeof(nvram_t),
+        .read = qla2x00_sysfs_read_nvram,
+        .write = qla2x00_sysfs_write_nvram,
+};
+
+void
+qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
+{
+        struct Scsi_Host *host = ha->host;
+
+        sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
+        sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
+}
+
+void
+qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
+{
+        struct Scsi_Host *host = ha->host;
+
+        sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
+        sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
+}
+
+/* Host attributes. */
+
+static void
+qla2x00_get_host_port_id(struct Scsi_Host *shost)
+{
+        scsi_qla_host_t *ha = to_qla_host(shost);
+
+        fc_host_port_id(shost) = ha->d_id.b.domain << 16 |
+            ha->d_id.b.area << 8 | ha->d_id.b.al_pa;
+}
+
+static void
+qla2x00_get_starget_node_name(struct scsi_target *starget)
+{
+        struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
+        scsi_qla_host_t *ha = to_qla_host(host);
+        os_tgt_t *tq = (os_tgt_t *) TGT_Q(ha, starget->id);
+        uint64_t node_name = 0;
+
+        if (tq->fcport)
+                node_name = be64_to_cpu(*(uint64_t *)tq->fcport->node_name);
+        fc_starget_node_name(starget) = node_name;
+}
+
+static void
+qla2x00_get_starget_port_name(struct scsi_target *starget)
+{
+        struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
+        scsi_qla_host_t *ha = to_qla_host(host);
+        os_tgt_t *tq = (os_tgt_t *) TGT_Q(ha, starget->id);
+        uint64_t port_name = 0;
+
+        if (tq->fcport)
+                port_name = be64_to_cpu(*(uint64_t *)tq->fcport->port_name);
+        fc_starget_port_name(starget) = port_name;
+}
+
+static void
+qla2x00_get_starget_port_id(struct scsi_target *starget)
+{
+        struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
+        scsi_qla_host_t *ha = to_qla_host(host);
+        os_tgt_t *tq = (os_tgt_t *) TGT_Q(ha, starget->id);
+        uint32_t port_id = 0;
+
+        if (tq->fcport)
+                port_id = tq->fcport->d_id.b.domain << 16 |
+                    tq->fcport->d_id.b.area << 8 | tq->fcport->d_id.b.al_pa;
+        fc_starget_port_id(starget) = port_id;
+}
+
+static void
+qla2x00_get_rport_loss_tmo(struct fc_rport *rport)
+{
+        os_tgt_t *tq = rport->dd_data;
+        scsi_qla_host_t *ha = tq->ha;
+
+        rport->dev_loss_tmo = ha->port_down_retry_count + 5;
+}
+
+static void
+qla2x00_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
+{
+        os_tgt_t *tq = rport->dd_data;
+        scsi_qla_host_t *ha = tq->ha;
+
+        if (timeout)
+                ha->port_down_retry_count = timeout;
+        else
+                ha->port_down_retry_count = 1;
+
+        rport->dev_loss_tmo = ha->port_down_retry_count + 5;
+}
+
+static struct fc_function_template qla2xxx_transport_functions = {
+
+        .show_host_node_name = 1,
+        .show_host_port_name = 1,
+        .get_host_port_id = qla2x00_get_host_port_id,
+        .show_host_port_id = 1,
+
+        .dd_fcrport_size = sizeof(os_tgt_t *),
+
+        .get_starget_node_name = qla2x00_get_starget_node_name,
+        .show_starget_node_name = 1,
+        .get_starget_port_name = qla2x00_get_starget_port_name,
+        .show_starget_port_name = 1,
+        .get_starget_port_id  = qla2x00_get_starget_port_id,
+        .show_starget_port_id = 1,
+
+        .get_rport_dev_loss_tmo = qla2x00_get_rport_loss_tmo,
+        .set_rport_dev_loss_tmo = qla2x00_set_rport_loss_tmo,
+        .show_rport_dev_loss_tmo = 1,
+
+};
+
+struct scsi_transport_template *
+qla2x00_alloc_transport_tmpl(void)
+{
+        return (fc_attach_transport(&qla2xxx_transport_functions));
+}
+
+void
+qla2x00_init_host_attr(scsi_qla_host_t *ha)
+{
+        fc_host_node_name(ha->host) =
+            be64_to_cpu(*(uint64_t *)ha->init_cb->node_name);
+        fc_host_port_name(ha->host) =
+            be64_to_cpu(*(uint64_t *)ha->init_cb->port_name);
+}