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authorJu, Seokmann <Seokmann.Ju@lsil.com>2006-07-25 08:44:48 -0600
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-07-28 13:10:23 -0500
commitfbf6080225a03aa2b3671acacebdf615f1d3f6ba (patch)
tree8813b1849713b29b52e73bfef8912b7e35b547ea /drivers/scsi/megaraid
parentf4246b33c774bb4330eb6286beed6d3c9f4373c4 (diff)
downloadblackbird-op-linux-fbf6080225a03aa2b3671acacebdf615f1d3f6ba.tar.gz
blackbird-op-linux-fbf6080225a03aa2b3671acacebdf615f1d3f6ba.zip
[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')
-rw-r--r--drivers/scsi/megaraid/mega_common.h3
-rw-r--r--drivers/scsi/megaraid/megaraid_mbox.c34
-rw-r--r--drivers/scsi/megaraid/megaraid_mbox.h4
3 files changed, 33 insertions, 8 deletions
diff --git a/drivers/scsi/megaraid/mega_common.h b/drivers/scsi/megaraid/mega_common.h
index 4675343228ad..12e38125b123 100644
--- a/drivers/scsi/megaraid/mega_common.h
+++ b/drivers/scsi/megaraid/mega_common.h
@@ -37,6 +37,9 @@
#define LSI_MAX_CHANNELS 16
#define LSI_MAX_LOGICAL_DRIVES_64LD (64+1)
+#define HBA_SIGNATURE_64_BIT 0x299
+#define PCI_CONF_AMISIG64 0xa4
+
/**
* scb_t - scsi command control block
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
diff --git a/drivers/scsi/megaraid/megaraid_mbox.h b/drivers/scsi/megaraid/megaraid_mbox.h
index 868fb0ec93e7..2b5a3285f799 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.h
+++ b/drivers/scsi/megaraid/megaraid_mbox.h
@@ -21,8 +21,8 @@
#include "megaraid_ioctl.h"
-#define MEGARAID_VERSION "2.20.4.8"
-#define MEGARAID_EXT_VERSION "(Release Date: Mon Apr 11 12:27:22 EST 2006)"
+#define MEGARAID_VERSION "2.20.4.9"
+#define MEGARAID_EXT_VERSION "(Release Date: Sun Jul 16 12:27:22 EST 2006)"
/*
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