From a2bbd0c923708a23c6fcc6bbc492f2eecadc676f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 21 Feb 2007 16:34:25 +0900 Subject: [PATCH] ahci: consider SDB FIS containing spurious NCQ completions HSM violation (regenerated) SDB FIS containing spurious NCQ completions is a clear protocol violation. Currently, only some Maxtors with early firmware revisions are showing this problem. Those firmwares have other NCQ related problems including buggy NCQ error reporting and occasional lock up after NCQ errors. Consider spurious NCQ completions HSM violation and freeze the port after it. EH will turn off NCQ after this happens several times. Eventually drives which show this behavior should be blacklisted for NCQ. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/ahci.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 6a3543e062..334f54c99f 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -198,7 +198,6 @@ struct ahci_port_priv { void *rx_fis; dma_addr_t rx_fis_dma; /* for NCQ spurious interrupt analysis */ - int ncq_saw_spurious_sdb_cnt; unsigned int ncq_saw_d2h:1; unsigned int ncq_saw_dmas:1; }; @@ -1160,23 +1159,24 @@ static void ahci_host_intr(struct ata_port *ap) known_irq = 1; } - if (status & PORT_IRQ_SDB_FIS && - pp->ncq_saw_spurious_sdb_cnt < 10) { + if (status & PORT_IRQ_SDB_FIS) { /* SDB FIS containing spurious completions might be - * dangerous, we need to know more about them. Print - * more of it. - */ + * dangerous, whine and fail commands with HSM + * violation. EH will turn off NCQ after several such + * failures. + */ const __le32 *f = pp->rx_fis + RX_FIS_SDB; - ata_port_printk(ap, KERN_INFO, "Spurious SDB FIS during NCQ " - "issue=0x%x SAct=0x%x FIS=%08x:%08x%s\n", - readl(port_mmio + PORT_CMD_ISSUE), - readl(port_mmio + PORT_SCR_ACT), - le32_to_cpu(f[0]), le32_to_cpu(f[1]), - pp->ncq_saw_spurious_sdb_cnt < 10 ? - "" : ", shutting up"); + ata_ehi_push_desc(ehi, "spurious completion during NCQ " + "issue=0x%x SAct=0x%x FIS=%08x:%08x", + readl(port_mmio + PORT_CMD_ISSUE), + readl(port_mmio + PORT_SCR_ACT), + le32_to_cpu(f[0]), le32_to_cpu(f[1])); + + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_port_freeze(ap); - pp->ncq_saw_spurious_sdb_cnt++; known_irq = 1; } -- 2.20.1