Bug 176560

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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20051201 Fedora/1.5-1.1.fc4.nr Firefox/1.5

Description of problem:
The driver that comes with the kernel for the southbridge SiS 965 and suppose to work with the driver for SiS 5513 chipset does not include DMA support. It was tested with [hdparm -d <device>] and with the same application it is not possible to activated the DMA support.

Version-Release number of selected component (if applicable):
2.6.14-1.1653_FC4

How reproducible:
Always

Steps to Reproduce:
1. In a system with SiS 965 Sothbridge and Chipset SiS 5513 install the corresponding kernel;
2. Verify with [hdparm], as root, if the DMA is enable for a give device (in my case a CD-ROM drive);
3. Try to activate the DMA support, using [hdparm];

It fails every time.
  

Actual Results:  The system respond with an error message that says that it is impossible to adjust the given parameter, DMA support to active.

Expected Results:  DMA should be always active.

Additional info:

I patched the kernel and it works. The above patch was inspired on:

http://lkml.org/lkml/2005/10/5/293

1. Patch to [pci_ids.h], called [linux-2.6-pci_ids.patch]:

--- a/include/linux/pci_ids.h   2005-12-26 09:00:09.000000000 +0100
+++ b/include/linux/pci_ids.h   2005-12-26 09:00:27.000000000 +0100
@@ -672,6 +672,7 @@
 #define PCI_DEVICE_ID_SI_961           0x0961
 #define PCI_DEVICE_ID_SI_962           0x0962
 #define PCI_DEVICE_ID_SI_963           0x0963
+#define PCI_DEVICE_ID_SI_965           0x0965
 #define PCI_DEVICE_ID_SI_5107          0x5107
 #define PCI_DEVICE_ID_SI_5300          0x5300
 #define PCI_DEVICE_ID_SI_5511          0x5511

2. Patch to [sis5513.c], called [linux-2.6-sis5513.patch]:

--- a/drivers/ide/pci/sis5513.c 2005-12-26 08:59:29.000000000 +0100
+++ b/drivers/ide/pci/sis5513.c 2005-12-26 09:02:44.000000000 +0100
@@ -20,6 +20,7 @@
  * ATA16/33 support from specs
  * ATA133 support for SiS961/962 by L.C. Chang <lcchang.tw>
  * ATA133 961/962/963 fixes by Vojtech Pavlik <vojtech>
+ * ATA133 inspired on http://lkml.org/lkml/2005/10/5/293
  *
  * Documentation:
  *     SiS chipset documentation available under NDA to companies only
@@ -74,7 +75,7 @@
 #define ATA_100a       0x04 // SiS730/SiS550 is ATA100 with ATA66 layout
 #define ATA_100                0x05
 #define ATA_133a       0x06 // SiS961b with 133 support
-#define ATA_133                0x07 // SiS962/963
+#define ATA_133                0x07 // SiS962/963/965

 static u8 chipset_family;

@@ -87,6 +88,8 @@ static const struct {
        u8 chipset_family;
        u8 flags;
 } SiSHostChipInfo[] = {
+       { "SiS965",     PCI_DEVICE_ID_SI_965,   ATA_133  },
+
        { "SiS745",     PCI_DEVICE_ID_SI_745,   ATA_100  },
        { "SiS735",     PCI_DEVICE_ID_SI_735,   ATA_100  },
        { "SiS733",     PCI_DEVICE_ID_SI_733,   ATA_100  },

3. Patch to {kernel-2.6.spec], called [kernel.kernel-2.6.spec.2.6.14.1-653.patch]:

--- kernel-2.6.spec.orig        2005-12-26 09:04:38.000000000 +0100
+++ kernel-2.6.spec     2005-12-26 09:07:14.000000000 +0100
@@ -352,6 +352,8 @@ Patch1771: linux-2.6-sata-promise-pata-p
 Patch1780: linux-2.6-net-bonding-feature-consolidation.patch
 Patch1781: linux-2.6-net-bridge-feature-consolidation.patch
 Patch1782: linux-2.6-selinux-mls-compat.patch
+Patch1783: linux-2.6-pci_ids.patch
+Patch1784: linux-2.6-sis5513.patch


 # ACPI patches.
@@ -813,6 +815,9 @@ cd linux-%{kversion}
 %patch1780 -p1
 %patch1781 -p1
 %patch1782 -p1
+# Fix DMA on SiS965 southbridge with SiS5513 driver
+%patch1783 -p1
+%patch1784 -p1

 # ACPI patches.
 # Enable EC burst

4. Build the rpm files and install it;
5. After that the system work as expected.