diff options
| author | Noriyuki Fujii <n-fujii@np.css.fujitsu.com> | 2009-11-20 16:27:20 +0900 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-10 08:54:16 -0600 |
| commit | aeab3fd7b865bc4086a80a83cfdd67dded3b41a0 (patch) | |
| tree | 131b4232f1406128464d34c0fbbb12ff66aede01 | |
| parent | d8705f11d89cfabf4a9f0ea234d4809b22abb33e (diff) | |
[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>
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index 134c63ef6d3..99ff99e45be 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"); |