Messages in this thread Patch in this message |  | | | Subject | [PATCH 2/2] Workaround for SB600 SATA ODD issue | | Date | Fri, 3 Nov 2006 14:00:04 -0500 (EST) | | From | (Luugi Marsan) |
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From: conke.hu@amd.com
There was an ASIC bug in the SB600 SATA controller of low revision (<=13) and CD burning may hang (only SATA ODD has this issue, and SATA HDD works well). The patch provides a workaround for this issue.
Signed-off-by: Luugi Marsan <luugi.marsan@amd.com>
--- linux-2.6.19-rc4-git5/drivers/ata/ahci.c.orig 2006-11-04 03:56:22.000000000 +0800 +++ linux-2.6.19-rc4-git5/drivers/ata/ahci.c 2006-11-04 04:20:36.000000000 +0800 @@ -189,6 +189,7 @@ struct ahci_host_priv { unsigned long flags; u32 cap; /* cache of HOST_CAP register */ u32 port_map; /* cache of HOST_PORTS_IMPL reg */ + u8 rev; /* PCI Revision ID */ }; struct ahci_port_priv { @@ -220,6 +221,7 @@ static int ahci_port_resume(struct ata_p static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); static int ahci_pci_device_resume(struct pci_dev *pdev); static void ahci_remove_one (struct pci_dev *pdev); +static int ahci_check_atapi_dma(struct ata_queued_cmd *qc); static struct scsi_host_template ahci_sht = { .module = THIS_MODULE, @@ -251,6 +253,8 @@ static const struct ata_port_operations .tf_read = ahci_tf_read, + .check_atapi_dma = ahci_check_atapi_dma, + .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, @@ -906,6 +910,28 @@ static unsigned int ahci_fill_sg(struct return n_sg; } +static int ahci_check_atapi_dma(struct ata_queued_cmd *qc) +{ + struct pci_dev *pdev = to_pci_dev(qc->ap->host->dev); + + /* walkaround for SB600 SATA ODD isuue */ + if (0x1002 == pdev->vendor && 0x4380 == pdev->device) + { + struct ahci_host_priv *priv = qc->ap->host->private_data; + u32 rq_len, low_8k; + + if ( 13 < priv->rev ) + return 0; + + rq_len = qc->scsicmd->request_bufflen; + low_8k = rq_len & 0x1fff; + + if ( (rq_len & 0xffffe000) && low_8k && (512 > low_8k) ) + return 1; + } + return 0; +} + static void ahci_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; @@ -1366,6 +1392,7 @@ static int ahci_host_init(struct ata_pro hpriv->cap = readl(mmio + HOST_CAP); hpriv->port_map = readl(mmio + HOST_PORTS_IMPL); + pci_read_config_byte(pdev, PCI_REVISION_ID, &hpriv->rev); probe_ent->n_ports = (hpriv->cap & 0x1f) + 1; VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n", - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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