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[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>
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@ -1,3 +1,64 @@
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Release Date : Fri May 19 09:31:45 EST 2006 - Seokmann Ju <sju@lsil.com>
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Current Version : 2.20.4.9 (scsi module), 2.20.2.6 (cmm module)
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Older Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
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1. Fixed a bug in megaraid_init_mbox().
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Customer reported "garbage in file on x86_64 platform".
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Root Cause: the driver registered controllers as 64-bit DMA capable
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for those which are not support it.
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Fix: Made change in the function inserting identification machanism
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identifying 64-bit DMA capable controllers.
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> -----Original Message-----
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> From: Vasily Averin [mailto:vvs@sw.ru]
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> Sent: Thursday, May 04, 2006 2:49 PM
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> To: linux-scsi@vger.kernel.org; Kolli, Neela; Mukker, Atul;
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> Ju, Seokmann; Bagalkote, Sreenivas;
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> James.Bottomley@SteelEye.com; devel@openvz.org
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> Subject: megaraid_mbox: garbage in file
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>
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> Hello all,
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>
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> I've investigated customers claim on the unstable work of
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> their node and found a
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> strange effect: reading from some files leads to the
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> "attempt to access beyond end of device" messages.
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>
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> I've checked filesystem, memory on the node, motherboard BIOS
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> version, but it
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> does not help and issue still has been reproduced by simple
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> file reading.
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>
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> Reproducer is simple:
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>
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> echo 0xffffffff >/proc/sys/dev/scsi/logging_level ;
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> cat /vz/private/101/root/etc/ld.so.cache >/tmp/ttt ;
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> echo 0 >/proc/sys/dev/scsi/logging
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>
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> It leads to the following messages in dmesg
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>
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> sd_init_command: disk=sda, block=871769260, count=26
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> sda : block=871769260
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> sda : reading 26/26 512 byte blocks.
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> scsi_add_timer: scmd: f79ed980, time: 7500, (c02b1420)
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> sd 0:1:0:0: send 0xf79ed980 sd 0:1:0:0:
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> command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00
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> buffer = 0xf7cfb540, bufflen = 13312, done = 0xc0366b40,
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> queuecommand 0xc0344010
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> leaving scsi_dispatch_cmnd()
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> scsi_delete_timer: scmd: f79ed980, rtn: 1
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> sd 0:1:0:0: done 0xf79ed980 SUCCESS 0 sd 0:1:0:0:
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> command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00
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> scsi host busy 1 failed 0
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> sd 0:1:0:0: Notifying upper driver of completion (result 0)
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> sd_rw_intr: sda: res=0x0
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> 26 sectors total, 13312 bytes done.
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> use_sg is 4
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> attempt to access beyond end of device
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> sda6: rw=0, want=1044134458, limit=951401367
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> Buffer I/O error on device sda6, logical block 522067228
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> attempt to access beyond end of device
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Release Date : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com>
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Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
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Older Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)
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@ -37,6 +37,9 @@
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#define LSI_MAX_CHANNELS 16
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#define LSI_MAX_LOGICAL_DRIVES_64LD (64+1)
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#define HBA_SIGNATURE_64_BIT 0x299
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#define PCI_CONF_AMISIG64 0xa4
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/**
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* scb_t - scsi command control block
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@ -10,7 +10,7 @@
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* 2 of the License, or (at your option) any later version.
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*
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* FILE : megaraid_mbox.c
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* Version : v2.20.4.8 (Apr 11 2006)
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* Version : v2.20.4.9 (Jul 16 2006)
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*
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* Authors:
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* Atul Mukker <Atul.Mukker@lsil.com>
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@ -720,6 +720,7 @@ megaraid_init_mbox(adapter_t *adapter)
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struct pci_dev *pdev;
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mraid_device_t *raid_dev;
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int i;
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uint32_t magic64;
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adapter->ito = MBOX_TIMEOUT;
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@ -863,12 +864,33 @@ megaraid_init_mbox(adapter_t *adapter)
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// Set the DMA mask to 64-bit. All supported controllers as capable of
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// DMA in this range
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if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) {
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pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
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con_log(CL_ANN, (KERN_WARNING
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"megaraid: could not set DMA mask for 64-bit.\n"));
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if (((magic64 == HBA_SIGNATURE_64_BIT) &&
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((adapter->pdev->subsystem_device !=
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PCI_SUBSYS_ID_MEGARAID_SATA_150_6) ||
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(adapter->pdev->subsystem_device !=
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PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
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(adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
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adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
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(adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
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adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
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(adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
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adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
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(adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
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adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
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(adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
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adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
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if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
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con_log(CL_ANN, (KERN_WARNING
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"megaraid: DMA mask for 64-bit failed\n"));
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goto out_free_sysfs_res;
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if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
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con_log(CL_ANN, (KERN_WARNING
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"megaraid: 32-bit DMA mask failed\n"));
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goto out_free_sysfs_res;
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}
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}
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}
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// setup tasklet for DPC
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@ -21,8 +21,8 @@
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#include "megaraid_ioctl.h"
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#define MEGARAID_VERSION "2.20.4.8"
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#define MEGARAID_EXT_VERSION "(Release Date: Mon Apr 11 12:27:22 EST 2006)"
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#define MEGARAID_VERSION "2.20.4.9"
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#define MEGARAID_EXT_VERSION "(Release Date: Sun Jul 16 12:27:22 EST 2006)"
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/*
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