Commit c3acd200 authored Apr 08, 2024 by Zhou Xuemei Committed by guzitao Mar 05, 2025

sw64: ahci: disable parallel bus scan

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IBDJNZ



--------------------------------

On sw64 platform, if scan this host(type MARVELL 9230) in parallel,
ahci ports reset failed as follows:

ata4: link is slow to respond, please be patient (ready=0)
ata8.00: qc timeout (cmd 0xa1)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata3: link is slow to respond, please be patient (ready=0)
ata8: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata4: COMRESET failed (errno=-16)
ata3: COMRESET failed (errno=-16)
ata4: link is slow to respond, please be patient (ready=0)
ata3: link is slow to respond, please be patient (ready=0)
ata8.00: qc timeout (cmd 0xa1)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata8: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata4: COMRESET failed (errno=-16)
ata3: COMRESET failed (errno=-16)
ata3: link is slow to respond, please be patient (ready=0)
ata4: link is slow to respond, please be patient (ready=0)
ata8.00: qc timeout (cmd 0xa1)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata8: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata4: COMRESET failed (errno=-16)
ata4: limiting SATA link speed to 3.0 Gbps
ata3: COMRESET failed (errno=-16)
ata3: limiting SATA link speed to 3.0 Gbps
ata4: COMRESET failed (errno=-16)
ata4: reset failed, giving up
ata3: COMRESET failed (errno=-16)
ata3: reset failed, giving up

To work around this problem, we disable it for synchronous scanning.

Signed-off-by: Zhou Xuemei <zhouxuemei@wxiat.com>
Reviewed-by: He Sheng <hesheng@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>

parent 89565799

drivers/ata/ahci.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -1918,10 +1918,12 @@ static int ahci_init_one(struct pci_dev pdev, const struct pci_device_id ent)
		}
		hpriv->irq = pci_irq_vector(pdev, 0);

		if (!IS_ENABLED(CONFIG_SW64)) {
		if (!(hpriv->cap & HOST_CAP_SSS) \|\| ahci_ignore_sss)
		host->flags \|= ATA_HOST_PARALLEL_SCAN;
		else
		dev_info(&pdev->dev, "SSS flag set, parallel bus scan disabled\n");
		}

		if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) {
		if (hpriv->cap & HOST_CAP_PART)