[SCSI] 3w-9xxx: add MSI support and misc fixes
This patch for the 3w-9xxx scsi driver applies on top of the
BKL-pushdown changes in -git9.
This patch does the following:
- Increase max AENs drained to 256.
- Add MSI support and "use_msi" module parameter.
- Fix bug in twa_get_param() on 4GB+.
- Use pci_resource_len() for ioremap().
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 7045511..b92c19b 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -4,7 +4,7 @@
Written By: Adam Radford <linuxraid@amcc.com>
Modifications By: Tom Couch <linuxraid@amcc.com>
- Copyright (C) 2004-2007 Applied Micro Circuits Corporation.
+ Copyright (C) 2004-2008 Applied Micro Circuits Corporation.
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
@@ -71,6 +71,10 @@
Add support for 9650SE controllers.
2.26.02.009 - Fix dma mask setting to fallback to 32-bit if 64-bit fails.
2.26.02.010 - Add support for 9690SA controllers.
+ 2.26.02.011 - Increase max AENs drained to 256.
+ Add MSI support and "use_msi" module parameter.
+ Fix bug in twa_get_param() on 4GB+.
+ Use pci_resource_len() for ioremap().
*/
#include <linux/module.h>
@@ -95,7 +99,7 @@
#include "3w-9xxx.h"
/* Globals */
-#define TW_DRIVER_VERSION "2.26.02.010"
+#define TW_DRIVER_VERSION "2.26.02.011"
static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
static unsigned int twa_device_extension_count;
static int twa_major = -1;
@@ -107,6 +111,10 @@
MODULE_LICENSE("GPL");
MODULE_VERSION(TW_DRIVER_VERSION);
+static int use_msi = 0;
+module_param(use_msi, int, S_IRUGO);
+MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0");
+
/* Function prototypes */
static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
@@ -1038,7 +1046,6 @@
TW_Command_Full *full_command_packet;
TW_Command *command_packet;
TW_Param_Apache *param;
- unsigned long param_value;
void *retval = NULL;
/* Setup the command packet */
@@ -1057,9 +1064,8 @@
param->table_id = cpu_to_le16(table_id | 0x8000);
param->parameter_id = cpu_to_le16(parameter_id);
param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
- param_value = tw_dev->generic_buffer_phys[request_id];
- command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(param_value);
+ command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
/* Post the command packet to the board */
@@ -2000,7 +2006,7 @@
{
struct Scsi_Host *host = NULL;
TW_Device_Extension *tw_dev;
- u32 mem_addr;
+ unsigned long mem_addr, mem_len;
int retval = -ENODEV;
retval = pci_enable_device(pdev);
@@ -2045,13 +2051,16 @@
goto out_free_device_extension;
}
- if (pdev->device == PCI_DEVICE_ID_3WARE_9000)
+ if (pdev->device == PCI_DEVICE_ID_3WARE_9000) {
mem_addr = pci_resource_start(pdev, 1);
- else
+ mem_len = pci_resource_len(pdev, 1);
+ } else {
mem_addr = pci_resource_start(pdev, 2);
+ mem_len = pci_resource_len(pdev, 2);
+ }
/* Save base address */
- tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE);
+ tw_dev->base_addr = ioremap(mem_addr, mem_len);
if (!tw_dev->base_addr) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
goto out_release_mem_region;
@@ -2086,7 +2095,7 @@
pci_set_drvdata(pdev, host);
- printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%x, IRQ: %d.\n",
+ printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%lx, IRQ: %d.\n",
host->host_no, mem_addr, pdev->irq);
printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
host->host_no,
@@ -2097,6 +2106,11 @@
le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
+ /* Try to enable MSI */
+ if (use_msi && (pdev->device != PCI_DEVICE_ID_3WARE_9000) &&
+ !pci_enable_msi(pdev))
+ set_bit(TW_USING_MSI, &tw_dev->flags);
+
/* Now setup the interrupt handler */
retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
if (retval) {
@@ -2120,6 +2134,8 @@
return 0;
out_remove_host:
+ if (test_bit(TW_USING_MSI, &tw_dev->flags))
+ pci_disable_msi(pdev);
scsi_remove_host(host);
out_iounmap:
iounmap(tw_dev->base_addr);
@@ -2151,6 +2167,10 @@
/* Shutdown the card */
__twa_shutdown(tw_dev);
+ /* Disable MSI if enabled */
+ if (test_bit(TW_USING_MSI, &tw_dev->flags))
+ pci_disable_msi(pdev);
+
/* Free IO remapping */
iounmap(tw_dev->base_addr);