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path: root/drivers/scsi/sym53c8xx_2/sym_glue.c
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Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_glue.c')
-rw-r--r--drivers/scsi/sym53c8xx_2/sym_glue.c137
1 files changed, 83 insertions, 54 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index f4e6cde1fd0..23e78201588 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -792,9 +792,9 @@ static int sym53c8xx_slave_configure(struct scsi_device *sdev)
/*
* Select queue depth from driver setup.
- * Donnot use more than configured by user.
- * Use at least 2.
- * Donnot use more than our maximum.
+ * Do not use more than configured by user.
+ * Use at least 1.
+ * Do not use more than our maximum.
*/
reqtags = sym_driver_setup.max_tag;
if (reqtags > tp->usrtags)
@@ -803,7 +803,7 @@ static int sym53c8xx_slave_configure(struct scsi_device *sdev)
reqtags = 0;
if (reqtags > SYM_CONF_MAX_TAG)
reqtags = SYM_CONF_MAX_TAG;
- depth_to_use = reqtags ? reqtags : 2;
+ depth_to_use = reqtags ? reqtags : 1;
scsi_adjust_queue_depth(sdev,
sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
depth_to_use);
@@ -1236,14 +1236,29 @@ static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
/*
+ * Free resources claimed by sym_iomap_device(). Note that
+ * sym_free_resources() should be used instead of this function after calling
+ * sym_attach().
+ */
+static void __devinit
+sym_iounmap_device(struct sym_device *device)
+{
+ if (device->s.ioaddr)
+ pci_iounmap(device->pdev, device->s.ioaddr);
+ if (device->s.ramaddr)
+ pci_iounmap(device->pdev, device->s.ramaddr);
+}
+
+/*
* Free controller resources.
*/
-static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
+static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
+ int do_free_irq)
{
/*
* Free O/S specific resources.
*/
- if (pdev->irq)
+ if (do_free_irq)
free_irq(pdev->irq, np->s.host);
if (np->s.ioaddr)
pci_iounmap(pdev, np->s.ioaddr);
@@ -1271,10 +1286,11 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
{
struct sym_data *sym_data;
struct sym_hcb *np = NULL;
- struct Scsi_Host *shost;
+ struct Scsi_Host *shost = NULL;
struct pci_dev *pdev = dev->pdev;
unsigned long flags;
struct sym_fw *fw;
+ int do_free_irq = 0;
printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
unit, dev->chip.name, pdev->revision, pci_name(pdev),
@@ -1285,11 +1301,11 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
*/
fw = sym_find_firmware(&dev->chip);
if (!fw)
- return NULL;
+ goto attach_failed;
shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
if (!shost)
- return NULL;
+ goto attach_failed;
sym_data = shost_priv(shost);
/*
@@ -1319,6 +1335,10 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
np->maxoffs = dev->chip.offset_max;
np->maxburst = dev->chip.burst_max;
np->myaddr = dev->host_id;
+ np->mmio_ba = (u32)dev->mmio_base;
+ np->ram_ba = (u32)dev->ram_base;
+ np->s.ioaddr = dev->s.ioaddr;
+ np->s.ramaddr = dev->s.ramaddr;
/*
* Edit its name.
@@ -1334,22 +1354,6 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
goto attach_failed;
}
- /*
- * Try to map the controller chip to
- * virtual and physical memory.
- */
- np->mmio_ba = (u32)dev->mmio_base;
- np->s.ioaddr = dev->s.ioaddr;
- np->s.ramaddr = dev->s.ramaddr;
-
- /*
- * Map on-chip RAM if present and supported.
- */
- if (!(np->features & FE_RAM))
- dev->ram_base = 0;
- if (dev->ram_base)
- np->ram_ba = (u32)dev->ram_base;
-
if (sym_hcb_attach(shost, fw, dev->nvram))
goto attach_failed;
@@ -1364,6 +1368,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
sym_name(np), pdev->irq);
goto attach_failed;
}
+ do_free_irq = 1;
/*
* After SCSI devices have been opened, we cannot
@@ -1416,12 +1421,13 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
"TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
spin_unlock_irqrestore(shost->host_lock, flags);
attach_failed:
- if (!shost)
- return NULL;
- printf_info("%s: giving up ...\n", sym_name(np));
+ printf_info("sym%d: giving up ...\n", unit);
if (np)
- sym_free_resources(np, pdev);
- scsi_host_put(shost);
+ sym_free_resources(np, pdev, do_free_irq);
+ else
+ sym_iounmap_device(dev);
+ if (shost)
+ scsi_host_put(shost);
return NULL;
}
@@ -1550,30 +1556,28 @@ static int __devinit sym_set_workarounds(struct sym_device *device)
}
/*
- * Read and check the PCI configuration for any detected NCR
- * boards and save data for attaching after all boards have
- * been detected.
+ * Map HBA registers and on-chip SRAM (if present).
*/
-static void __devinit
-sym_init_device(struct pci_dev *pdev, struct sym_device *device)
+static int __devinit
+sym_iomap_device(struct sym_device *device)
{
- int i = 2;
+ struct pci_dev *pdev = device->pdev;
struct pci_bus_region bus_addr;
-
- device->host_id = SYM_SETUP_HOST_ID;
- device->pdev = pdev;
+ int i = 2;
pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
device->mmio_base = bus_addr.start;
- /*
- * If the BAR is 64-bit, resource 2 will be occupied by the
- * upper 32 bits
- */
- if (!pdev->resource[i].flags)
- i++;
- pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
- device->ram_base = bus_addr.start;
+ if (device->chip.features & FE_RAM) {
+ /*
+ * If the BAR is 64-bit, resource 2 will be occupied by the
+ * upper 32 bits
+ */
+ if (!pdev->resource[i].flags)
+ i++;
+ pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
+ device->ram_base = bus_addr.start;
+ }
#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
if (device->mmio_base)
@@ -1583,9 +1587,21 @@ sym_init_device(struct pci_dev *pdev, struct sym_device *device)
if (!device->s.ioaddr)
device->s.ioaddr = pci_iomap(pdev, 0,
pci_resource_len(pdev, 0));
- if (device->ram_base)
+ if (!device->s.ioaddr) {
+ dev_err(&pdev->dev, "could not map registers; giving up.\n");
+ return -EIO;
+ }
+ if (device->ram_base) {
device->s.ramaddr = pci_iomap(pdev, i,
pci_resource_len(pdev, i));
+ if (!device->s.ramaddr) {
+ dev_warn(&pdev->dev,
+ "could not map SRAM; continuing anyway.\n");
+ device->ram_base = 0;
+ }
+ }
+
+ return 0;
}
/*
@@ -1659,7 +1675,8 @@ static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
udelay(10);
OUTB(np, nc_istat, 0);
- sym_free_resources(np, pdev);
+ sym_free_resources(np, pdev, 1);
+ scsi_host_put(shost);
return 1;
}
@@ -1696,9 +1713,13 @@ static int __devinit sym2_probe(struct pci_dev *pdev,
struct sym_device sym_dev;
struct sym_nvram nvram;
struct Scsi_Host *shost;
+ int do_iounmap = 0;
+ int do_disable_device = 1;
memset(&sym_dev, 0, sizeof(sym_dev));
memset(&nvram, 0, sizeof(nvram));
+ sym_dev.pdev = pdev;
+ sym_dev.host_id = SYM_SETUP_HOST_ID;
if (pci_enable_device(pdev))
goto leave;
@@ -1708,12 +1729,17 @@ static int __devinit sym2_probe(struct pci_dev *pdev,
if (pci_request_regions(pdev, NAME53C8XX))
goto disable;
- sym_init_device(pdev, &sym_dev);
if (sym_check_supported(&sym_dev))
goto free;
- if (sym_check_raid(&sym_dev))
- goto leave; /* Don't disable the device */
+ if (sym_iomap_device(&sym_dev))
+ goto free;
+ do_iounmap = 1;
+
+ if (sym_check_raid(&sym_dev)) {
+ do_disable_device = 0; /* Don't disable the device */
+ goto free;
+ }
if (sym_set_workarounds(&sym_dev))
goto free;
@@ -1722,6 +1748,7 @@ static int __devinit sym2_probe(struct pci_dev *pdev,
sym_get_nvram(&sym_dev, &nvram);
+ do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
shost = sym_attach(&sym2_template, attach_count, &sym_dev);
if (!shost)
goto free;
@@ -1737,9 +1764,12 @@ static int __devinit sym2_probe(struct pci_dev *pdev,
detach:
sym_detach(pci_get_drvdata(pdev), pdev);
free:
+ if (do_iounmap)
+ sym_iounmap_device(&sym_dev);
pci_release_regions(pdev);
disable:
- pci_disable_device(pdev);
+ if (do_disable_device)
+ pci_disable_device(pdev);
leave:
return -ENODEV;
}
@@ -1749,7 +1779,6 @@ static void sym2_remove(struct pci_dev *pdev)
struct Scsi_Host *shost = pci_get_drvdata(pdev);
scsi_remove_host(shost);
- scsi_host_put(shost);
sym_detach(shost, pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);