diff options
| author | Ju, Seokmann <Seokmann.Ju@lsil.com> | 2006-07-25 08:44:48 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-07-28 13:10:23 -0500 |
| commit | fbf6080225a03aa2b3671acacebdf615f1d3f6ba (patch) | |
| tree | 8813b1849713b29b52e73bfef8912b7e35b547ea /drivers/scsi/megaraid/megaraid_mbox.c | |
| parent | f4246b33c774bb4330eb6286beed6d3c9f4373c4 (diff) | |
[SCSI] megaraid_{mm,mbox}: 64-bit DMA capability checker
This patch contains
- a fix for 64-bit DMA capability check in megaraid_{mm,mbox} driver.
- includes changes (going back to 32-bit DMA mask if 64-bit DMA mask
failes) suggested by James with previous patch.
- addition of SATA 150-4/6 as commented by Vasily Averin.
With patch, the driver access PCIconfiguration space with dedicated
offset to read a signature. If the signature read, it means that the
controller has capability to handle 64-bit DMA.
Without this patch, the driver used to blindly claim 64-bit DMA
capability.
The issue has been reported by Vasily Averin [vvs@sw.ru].
Thank you Vasily for the reporting.
Signed-Off By: Seokmann Ju <seokmann.ju@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mbox.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mbox.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c index 92715130ac09..e671af0b4f58 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.c +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -10,7 +10,7 @@ * 2 of the License, or (at your option) any later version. * * FILE : megaraid_mbox.c - * Version : v2.20.4.8 (Apr 11 2006) + * Version : v2.20.4.9 (Jul 16 2006) * * Authors: * Atul Mukker <Atul.Mukker@lsil.com> @@ -720,6 +720,7 @@ megaraid_init_mbox(adapter_t *adapter) struct pci_dev *pdev; mraid_device_t *raid_dev; int i; + uint32_t magic64; adapter->ito = MBOX_TIMEOUT; @@ -863,12 +864,33 @@ megaraid_init_mbox(adapter_t *adapter) // Set the DMA mask to 64-bit. All supported controllers as capable of // DMA in this range - if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) { - - con_log(CL_ANN, (KERN_WARNING - "megaraid: could not set DMA mask for 64-bit.\n")); + pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); + + if (((magic64 == HBA_SIGNATURE_64_BIT) && + ((adapter->pdev->subsystem_device != + PCI_SUBSYS_ID_MEGARAID_SATA_150_6) || + (adapter->pdev->subsystem_device != + PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || + (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && + adapter->pdev->device == PCI_DEVICE_ID_VERDE) || + (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && + adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || + (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && + adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || + (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && + adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || + (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && + adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { + if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) { + con_log(CL_ANN, (KERN_WARNING + "megaraid: DMA mask for 64-bit failed\n")); - goto out_free_sysfs_res; + if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) { + con_log(CL_ANN, (KERN_WARNING + "megaraid: 32-bit DMA mask failed\n")); + goto out_free_sysfs_res; + } + } } // setup tasklet for DPC |