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authorNoriyuki Fujii <n-fujii@np.css.fujitsu.com>2009-11-20 10:27:20 +0300
committerJames Bottomley <James.Bottomley@suse.de>2009-12-10 17:54:16 +0300
commitaeab3fd7b865bc4086a80a83cfdd67dded3b41a0 (patch)
tree131b4232f1406128464d34c0fbbb12ff66aede01 /drivers/scsi/megaraid/megaraid_sas.c
parentd8705f11d89cfabf4a9f0ea234d4809b22abb33e (diff)
downloadlinux-aeab3fd7b865bc4086a80a83cfdd67dded3b41a0.tar.xz
[SCSI] megaraid_sas: make driver PCI legacy I/O port free driver
On the large servers, I/O port resource may not be assigned to all the PCI devices since it is limited (to 64KB on Intel Architecture[1]) and it may also be fragmented (I/O base register of PCI-to-PCI bridge will usually be aligned to a 4KB boundary[2]). If no I/O port resource is assigned to devices, those devices do not work. [1] Some machines support 64KB I/O port space per PCI segment. [2] Some P2P bridges support optional 1KB aligned I/O base. Therefore, I made a patch for MegaRAID SAS driver to make PCI legacy I/O port free. I have also tested the patch and it had no problem. The way to make PCI legacy I/O port free is the same as Fusion-MPT driver's and it has been merged into 2.6.30.4. This has already been fixed in e1000 and lpfc. As a result of the above, the driver can handle its device even when there are a huge number of PCI devices being used on the system and no I/O port region assigned to the device. Signed-off-by: Noriyuki Fujii <n-fujii@np.css.fujitsu.com> Acked-by: "Yang, Bo" <Bo.Yang@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas.c')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 134c63ef6d38..99ff99e45bee 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -2501,7 +2501,9 @@ static int megasas_init_mfi(struct megasas_instance *instance)
instance->base_addr = pci_resource_start(instance->pdev, 0);
}
- if (pci_request_regions(instance->pdev, "megasas: LSI")) {
+ if (pci_request_selected_regions(instance->pdev,
+ pci_select_bars(instance->pdev, IORESOURCE_MEM),
+ "megasas: LSI")) {
printk(KERN_DEBUG "megasas: IO memory region busy!\n");
return -EBUSY;
}
@@ -2642,7 +2644,8 @@ static int megasas_init_mfi(struct megasas_instance *instance)
iounmap(instance->reg_set);
fail_ioremap:
- pci_release_regions(instance->pdev);
+ pci_release_selected_regions(instance->pdev,
+ pci_select_bars(instance->pdev, IORESOURCE_MEM));
return -EINVAL;
}
@@ -2662,7 +2665,8 @@ static void megasas_release_mfi(struct megasas_instance *instance)
iounmap(instance->reg_set);
- pci_release_regions(instance->pdev);
+ pci_release_selected_regions(instance->pdev,
+ pci_select_bars(instance->pdev, IORESOURCE_MEM));
}
/**
@@ -2971,7 +2975,7 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
/*
* PCI prepping: enable device set bus mastering and dma mask
*/
- rval = pci_enable_device(pdev);
+ rval = pci_enable_device_mem(pdev);
if (rval) {
return rval;
@@ -3276,7 +3280,7 @@ megasas_resume(struct pci_dev *pdev)
/*
* PCI prepping: enable device set bus mastering and dma mask
*/
- rval = pci_enable_device(pdev);
+ rval = pci_enable_device_mem(pdev);
if (rval) {
printk(KERN_ERR "megasas: Enable device failed\n");