[SCSI] sparc: Port esp to new SBUS driver layer.

This also turns the driver into a new-style scsi driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 157 insertions, 165 deletions

diff --git a/drivers/scsi/esp.c b/drivers/scsi/esp.c
index 0a3e45d7a972..8e8fc43c1d22 100644
--- a/drivers/scsi/esp.c
+++ b/drivers/scsi/esp.c
@@ -1,7 +1,6 @@
-/* $Id: esp.c,v 1.101 2002/01/15 06:48:55 davem Exp $
- * esp.c:  EnhancedScsiProcessor Sun SCSI driver code.
+/* esp.c: ESP Sun SCSI driver.
  *
- * Copyright (C) 1995, 1998 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1995, 1998, 2006 David S. Miller (davem@davemloft.net)
  */
 
 /* TODO:
@@ -185,11 +184,6 @@ enum {
 /*5*/   do_intr_end
 };
 
-/* The master ring of all esp hosts we are managing in this driver. */
-static struct esp *espchain;
-static DEFINE_SPINLOCK(espchain_lock);
-static int esps_running = 0;
-
 /* Forward declarations. */
 static irqreturn_t esp_intr(int irq, void *dev_id, struct pt_regs *pregs);
 
@@ -694,36 +688,6 @@ static void __init esp_bootup_reset(struct esp *esp)
         sbus_readb(esp->eregs + ESP_INTRPT);
 }
 
-static void esp_chain_add(struct esp *esp)
-{
-        spin_lock_irq(&espchain_lock);
-        if (espchain) {
-                struct esp *elink = espchain;
-                while (elink->next)
-                        elink = elink->next;
-                elink->next = esp;
-        } else {
-                espchain = esp;
-        }
-        esp->next = NULL;
-        spin_unlock_irq(&espchain_lock);
-}
-
-static void esp_chain_del(struct esp *esp)
-{
-        spin_lock_irq(&espchain_lock);
-        if (espchain == esp) {
-                espchain = esp->next;
-        } else {
-                struct esp *elink = espchain;
-                while (elink->next != esp)
-                        elink = elink->next;
-                elink->next = esp->next;
-        }
-        esp->next = NULL;
-        spin_unlock_irq(&espchain_lock);
-}
-
 static int __init esp_find_dvma(struct esp *esp, struct sbus_dev *dma_sdev)
 {
         struct sbus_dev *sdev = esp->sdev;
@@ -830,19 +794,20 @@ static int __init esp_register_irq(struct esp *esp)
 static void __init esp_get_scsi_id(struct esp *esp)
 {
         struct sbus_dev *sdev = esp->sdev;
+        struct device_node *dp = sdev->ofdev.node;
 
-        esp->scsi_id = prom_getintdefault(esp->prom_node,
-                                          "initiator-id",
-                                          -1);
+        esp->scsi_id = of_getintprop_default(dp,
+                                             "initiator-id",
+                                             -1);
         if (esp->scsi_id == -1)
-                esp->scsi_id = prom_getintdefault(esp->prom_node,
-                                                  "scsi-initiator-id",
-                                                  -1);
+                esp->scsi_id = of_getintprop_default(dp,
+                                                     "scsi-initiator-id",
+                                                     -1);
         if (esp->scsi_id == -1)
                 esp->scsi_id = (sdev->bus == NULL) ? 7 :
-                        prom_getintdefault(sdev->bus->prom_node,
-                                           "scsi-initiator-id",
-                                           7);
+                        of_getintprop_default(sdev->bus->ofdev.node,
+                                              "scsi-initiator-id",
+                                              7);
         esp->ehost->this_id = esp->scsi_id;
         esp->scsi_id_mask = (1 << esp->scsi_id);
 
@@ -1067,28 +1032,30 @@ static void __init esp_init_swstate(struct esp *esp)
         esp->prev_hme_dmacsr = 0xffffffff;
 }
 
-static int __init detect_one_esp(struct scsi_host_template *tpnt, struct sbus_dev *esp_dev,
-                                 struct sbus_dev *espdma, struct sbus_bus *sbus,
-                                 int id, int hme)
+static int __init detect_one_esp(struct scsi_host_template *tpnt,
+                                 struct device *dev,
+                                 struct sbus_dev *esp_dev,
+                                 struct sbus_dev *espdma,
+                                 struct sbus_bus *sbus,
+                                 int hme)
 {
-        struct Scsi_Host *esp_host = scsi_register(tpnt, sizeof(struct esp));
+        static int instance;
+        struct Scsi_Host *esp_host = scsi_host_alloc(tpnt, sizeof(struct esp));
         struct esp *esp;
         
-        if (!esp_host) {
-                printk("ESP: Cannot register SCSI host\n");
-                return -1;
-        }
+        if (!esp_host)
+                return -ENOMEM;
+
         if (hme)
                 esp_host->max_id = 16;
         esp = (struct esp *) esp_host->hostdata;
         esp->ehost = esp_host;
         esp->sdev = esp_dev;
-        esp->esp_id = id;
+        esp->esp_id = instance;
         esp->prom_node = esp_dev->prom_node;
         prom_getstring(esp->prom_node, "name", esp->prom_name,
                        sizeof(esp->prom_name));
 
-        esp_chain_add(esp);
         if (esp_find_dvma(esp, espdma) < 0)
                 goto fail_unlink;
         if (esp_map_regs(esp, hme) < 0) {
@@ -1115,8 +1082,19 @@ static int __init detect_one_esp(struct scsi_host_template *tpnt, struct sbus_de
 
         esp_bootup_reset(esp);
 
+        if (scsi_add_host(esp_host, dev))
+                goto fail_free_irq;
+
+        dev_set_drvdata(&esp_dev->ofdev.dev, esp);
+
+        scsi_scan_host(esp_host);
+        instance++;
+
         return 0;
 
+fail_free_irq:
+        free_irq(esp->ehost->irq, esp);
+
 fail_unmap_cmdarea:
         sbus_free_consistent(esp->sdev, 16,
                              (void *) esp->esp_command,
@@ -1129,119 +1107,101 @@ fail_dvma_release:
         esp->dma->allocated = 0;
 
 fail_unlink:
-        esp_chain_del(esp);
-        scsi_unregister(esp_host);
+        scsi_host_put(esp_host);
         return -1;
 }
 
 /* Detecting ESP chips on the machine.  This is the simple and easy
  * version.
  */
+static int __devexit esp_remove_common(struct esp *esp)
+{
+        unsigned int irq = esp->ehost->irq;
+
+        scsi_remove_host(esp->ehost);
+
+        scsi_host_put(esp->ehost);
+        esp->ehost = NULL;
+
+        ESP_INTSOFF(esp->dregs);
+#if 0
+        esp_reset_dma(esp);
+        esp_reset_esp(esp);
+#endif
+
+        free_irq(irq, esp);
+        sbus_free_consistent(esp->sdev, 16,
+                             (void *) esp->esp_command, esp->esp_command_dvma);
+        sbus_iounmap(esp->eregs, ESP_REG_SIZE);
+        esp->dma->allocated = 0;
+
+        kfree(esp);
+
+        return 0;
+}
+
 
 #ifdef CONFIG_SUN4
 
 #include <asm/sun4paddr.h>
 
-static int __init esp_detect(struct scsi_host_template *tpnt)
-{
-        static struct sbus_dev esp_dev;
-        int esps_in_use = 0;
-
-        espchain = NULL;
+static struct sbus_dev sun4_esp_dev;
 
+static int __init esp_sun4_probe(struct scsi_host_template *tpnt)
+{
         if (sun4_esp_physaddr) {
-                memset (&esp_dev, 0, sizeof(esp_dev));
-                esp_dev.reg_addrs[0].phys_addr = sun4_esp_physaddr;
-                esp_dev.irqs[0] = 4;
-                esp_dev.resource[0].start = sun4_esp_physaddr;
-                esp_dev.resource[0].end = sun4_esp_physaddr + ESP_REG_SIZE - 1;
-                esp_dev.resource[0].flags = IORESOURCE_IO;
-
-                if (!detect_one_esp(tpnt, &esp_dev, NULL, NULL, 0, 0))
-                        esps_in_use++;
-                printk("ESP: Total of 1 ESP hosts found, %d actually in use.\n", esps_in_use);
-                esps_running =  esps_in_use;
+                memset(&sun4_esp_dev, 0, sizeof(esp_dev));
+                sun4_esp_dev.reg_addrs[0].phys_addr = sun4_esp_physaddr;
+                sun4_esp_dev.irqs[0] = 4;
+                sun4_esp_dev.resource[0].start = sun4_esp_physaddr;
+                sun4_esp_dev.resource[0].end =
+                        sun4_esp_physaddr + ESP_REG_SIZE - 1;
+                sun4_esp_dev.resource[0].flags = IORESOURCE_IO;
+
+                return detect_one_esp(tpnt, NULL,
+                                      &sun4_esp_dev, NULL, NULL, 0);
         }
-        return esps_in_use;
+        return 0;
 }
 
-#else /* !CONFIG_SUN4 */
-
-static int __init esp_detect(struct scsi_host_template *tpnt)
+static int __devexit esp_sun4_remove(void)
 {
-        struct sbus_bus *sbus;
-        struct sbus_dev *esp_dev, *sbdev_iter;
-        int nesps = 0, esps_in_use = 0;
+        struct esp *esp = dev_get_drvdata(&dev->dev);
 
-        espchain = 0;
-        if (!sbus_root) {
-#ifdef CONFIG_PCI
-                return 0;
-#else
-                panic("No SBUS in esp_detect()");
-#endif
-        }
-        for_each_sbus(sbus) {
-                for_each_sbusdev(sbdev_iter, sbus) {
-                        struct sbus_dev *espdma = NULL;
-                        int hme = 0;
-
-                        /* Is it an esp sbus device? */
-                        esp_dev = sbdev_iter;
-                        if (strcmp(esp_dev->prom_name, "esp") &&
-                            strcmp(esp_dev->prom_name, "SUNW,esp")) {
-                                if (!strcmp(esp_dev->prom_name, "SUNW,fas")) {
-                                        hme = 1;
-                                        espdma = esp_dev;
-                                } else {
-                                        if (!esp_dev->child ||
-                                            (strcmp(esp_dev->prom_name, "espdma") &&
-                                             strcmp(esp_dev->prom_name, "dma")))
-                                                continue; /* nope... */
-                                        espdma = esp_dev;
-                                        esp_dev = esp_dev->child;
-                                        if (strcmp(esp_dev->prom_name, "esp") &&
-                                            strcmp(esp_dev->prom_name, "SUNW,esp"))
-                                                continue; /* how can this happen? */
-                                }
-                        }
-                        
-                        if (detect_one_esp(tpnt, esp_dev, espdma, sbus, nesps++, hme) < 0)
-                                continue;
-                                
-                        esps_in_use++;
-                } /* for each sbusdev */
-        } /* for each sbus */
-        printk("ESP: Total of %d ESP hosts found, %d actually in use.\n", nesps,
-               esps_in_use);
-        esps_running = esps_in_use;
-        return esps_in_use;
+        return esp_remove_common(esp);
 }
 
-#endif /* !CONFIG_SUN4 */
+#else /* !CONFIG_SUN4 */
 
-/*
- */
-static int esp_release(struct Scsi_Host *host)
+static int __devinit esp_sbus_probe(struct of_device *dev, const struct of_device_id *match)
 {
-        struct esp *esp = (struct esp *) host->hostdata;
+        struct sbus_dev *sdev = to_sbus_device(&dev->dev);
+        struct device_node *dp = dev->node;
+        struct sbus_dev *dma_sdev = NULL;
+        int hme = 0;
+
+        if (dp->parent &&
+            (!strcmp(dp->parent->name, "espdma") ||
+             !strcmp(dp->parent->name, "dma")))
+                dma_sdev = sdev->parent;
+        else if (!strcmp(dp->name, "SUNW,fas")) {
+                dma_sdev = sdev;
+                hme = 1;
+        }
 
-        ESP_INTSOFF(esp->dregs);
-#if 0
-        esp_reset_dma(esp);
-        esp_reset_esp(esp);
-#endif
+        return detect_one_esp(match->data, &dev->dev,
+                              sdev, dma_sdev, sdev->bus, hme);
+}
 
-        free_irq(esp->ehost->irq, esp);
-        sbus_free_consistent(esp->sdev, 16,
-                             (void *) esp->esp_command, esp->esp_command_dvma);
-        sbus_iounmap(esp->eregs, ESP_REG_SIZE);
-        esp->dma->allocated = 0;
-        esp_chain_del(esp);
+static int __devexit esp_sbus_remove(struct of_device *dev)
+{
+        struct esp *esp = dev_get_drvdata(&dev->dev);
 
-        return 0;
+        return esp_remove_common(esp);
 }
 
+#endif /* !CONFIG_SUN4 */
+
 /* The info function will return whatever useful
  * information the developer sees fit.  If not provided, then
  * the name field will be used instead.
@@ -1415,18 +1375,11 @@ static int esp_host_info(struct esp *esp, char *ptr, off_t offset, int len)
 static int esp_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
                          int length, int inout)
 {
-        struct esp *esp;
+        struct esp *esp = (struct esp *) host->hostdata;
 
         if (inout)
                 return -EINVAL; /* not yet */
 
-        for_each_esp(esp) {
-                if (esp->ehost == host)
-                        break;
-        }
-        if (!esp)
-                return -EINVAL;
-
         if (start)
                 *start = buffer;
 
@@ -4377,15 +4330,12 @@ static void esp_slave_destroy(struct scsi_device *SDptr)
         SDptr->hostdata = NULL;
 }
 
-static struct scsi_host_template driver_template = {
-        .proc_name              = "esp",
-        .proc_info              = esp_proc_info,
-        .name                   = "Sun ESP 100/100a/200",
-        .detect                 = esp_detect,
+static struct scsi_host_template esp_template = {
+        .module                 = THIS_MODULE,
+        .name                   = "esp",
+        .info                   = esp_info,
         .slave_alloc            = esp_slave_alloc,
         .slave_destroy          = esp_slave_destroy,
-        .release                = esp_release,
-        .info                   = esp_info,
         .queuecommand           = esp_queue,
         .eh_abort_handler       = esp_abort,
         .eh_bus_reset_handler   = esp_reset,
@@ -4394,12 +4344,58 @@ static struct scsi_host_template driver_template = {
         .sg_tablesize           = SG_ALL,
         .cmd_per_lun            = 1,
         .use_clustering         = ENABLE_CLUSTERING,
+        .proc_name              = "esp",
+        .proc_info              = esp_proc_info,
+};
+
+#ifndef CONFIG_SUN4
+static struct of_device_id esp_match[] = {
+        {
+                .name = "SUNW,esp",
+                .data = &esp_template,
+        },
+        {
+                .name = "SUNW,fas",
+                .data = &esp_template,
+        },
+        {
+                .name = "esp",
+                .data = &esp_template,
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, esp_match);
+
+static struct of_platform_driver esp_sbus_driver = {
+        .name           = "esp",
+        .match_table    = esp_match,
+        .probe          = esp_sbus_probe,
+        .remove         = __devexit_p(esp_sbus_remove),
 };
+#endif
+
+static int __init esp_init(void)
+{
+#ifdef CONFIG_SUN4
+        return esp_sun4_probe(&esp_template);
+#else
+        return of_register_driver(&esp_sbus_driver, &sbus_bus_type);
+#endif
+}
 
-#include "scsi_module.c"
+static void __exit esp_exit(void)
+{
+#ifdef CONFIG_SUN4
+        esp_sun4_remove();
+#else
+        of_unregister_driver(&esp_sbus_driver);
+#endif
+}
 
-MODULE_DESCRIPTION("EnhancedScsiProcessor Sun SCSI driver");
-MODULE_AUTHOR("David S. Miller (davem@redhat.com)");
+MODULE_DESCRIPTION("ESP Sun SCSI driver");
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
 
+module_init(esp_init);
+module_exit(esp_exit);
diff --git a/drivers/scsi/esp.h b/drivers/scsi/esp.h
index 73f7d6968ab6..a98cda9121fc 100644
--- a/drivers/scsi/esp.h
+++ b/drivers/scsi/esp.h
@@ -403,8 +403,4 @@ struct esp {
 #define ESP_MHZ_TO_CYCLE(mhertz)  ((1000000000) / ((mhertz) / 1000))
 #define ESP_TICK(ccf, cycle)  ((7682 * (ccf) * (cycle) / 1000))
 
-/* For our interrupt engine. */
-#define for_each_esp(esp) \
-        for((esp) = espchain; (esp); (esp) = (esp)->next)
-
 #endif /* !(_SPARC_ESP_H) */