From 6e5fe5b12cfcd9ed4303c9a4f4a22a694104d28f Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Fri, 4 Mar 2011 09:54:52 +0100 Subject: ahci: EM supported message type sysfs attribute This patch adds an sysfs attribute 'em_message_supported' to the ahci host device which prints out the supported enclosure management message types. Signed-off-by: Hannes Reinecke Signed-off-by: Jeff Garzik --- drivers/ata/libahci.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/ata/libahci.c') diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 26d452339e98..633159b5152a 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -109,6 +109,8 @@ static ssize_t ahci_read_em_buffer(struct device *dev, static ssize_t ahci_store_em_buffer(struct device *dev, struct device_attribute *attr, const char *buf, size_t size); +static ssize_t ahci_show_em_supported(struct device *dev, + struct device_attribute *attr, char *buf); static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); @@ -116,6 +118,7 @@ static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, ahci_read_em_buffer, ahci_store_em_buffer); +static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); struct device_attribute *ahci_shost_attrs[] = { &dev_attr_link_power_management_policy, @@ -126,6 +129,7 @@ struct device_attribute *ahci_shost_attrs[] = { &dev_attr_ahci_host_version, &dev_attr_ahci_port_cmd, &dev_attr_em_buffer, + &dev_attr_em_message_supported, NULL }; EXPORT_SYMBOL_GPL(ahci_shost_attrs); @@ -343,6 +347,24 @@ static ssize_t ahci_store_em_buffer(struct device *dev, return size; } +static ssize_t ahci_show_em_supported(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_host_priv *hpriv = ap->host->private_data; + void __iomem *mmio = hpriv->mmio; + u32 em_ctl; + + em_ctl = readl(mmio + HOST_EM_CTL); + + return sprintf(buf, "%s%s%s%s\n", + em_ctl & EM_CTL_LED ? "led " : "", + em_ctl & EM_CTL_SAFTE ? "saf-te " : "", + em_ctl & EM_CTL_SES ? "ses-2 " : "", + em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); +} + /** * ahci_save_initial_config - Save and fixup initial config values * @dev: target AHCI device -- cgit v1.2.3 From 7b3a24c57d2eeda8dba9c205342b12689c4679f9 Mon Sep 17 00:00:00 2001 From: Maxime Bizon Date: Wed, 16 Mar 2011 14:58:32 +0100 Subject: ahci: don't enable port irq before handler is registered The ahci_pmp_attach() & ahci_pmp_detach() unmask port irqs, but they are also called during port initialization, before ahci host irq handler is registered. On ce4100 platform, this sometimes triggers "irq 4: nobody cared" message when loading driver. Fixed this by not touching the register if the port is in frozen state, and mark all uninitialized port as frozen. Signed-off-by: Maxime Bizon Acked-by: Tejun Heo Cc: stable@kernel.org Signed-off-by: Jeff Garzik --- drivers/ata/libahci.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'drivers/ata/libahci.c') diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 633159b5152a..d38c40fe4ddb 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -1919,7 +1919,17 @@ static void ahci_pmp_attach(struct ata_port *ap) ahci_enable_fbs(ap); pp->intr_mask |= PORT_IRQ_BAD_PMP; - writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); + + /* + * We must not change the port interrupt mask register if the + * port is marked frozen, the value in pp->intr_mask will be + * restored later when the port is thawed. + * + * Note that during initialization, the port is marked as + * frozen since the irq handler is not yet registered. + */ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) + writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } static void ahci_pmp_detach(struct ata_port *ap) @@ -1935,7 +1945,10 @@ static void ahci_pmp_detach(struct ata_port *ap) writel(cmd, port_mmio + PORT_CMD); pp->intr_mask &= ~PORT_IRQ_BAD_PMP; - writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); + + /* see comment above in ahci_pmp_attach() */ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) + writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } int ahci_port_resume(struct ata_port *ap) -- cgit v1.2.3 From 270dac35c26433d06a89150c51e75ca0181ca7e4 Mon Sep 17 00:00:00 2001 From: Jian Peng Date: Fri, 22 Apr 2011 23:58:10 -0700 Subject: libata: ahci_start_engine compliant to AHCI spec At the end of section 10.1 of AHCI spec (rev 1.3), it states Software shall not set PxCMD.ST to 1 until it is determined that a functoinal device is present on the port as determined by PxTFD.STS.BSY=0, PxTFD.STS.DRQ=0 and PxSSTS.DET=3h Even though most AHCI host controller works without this check, specific controller will fail under this condition. Signed-off-by: Jian Peng Signed-off-by: Jeff Garzik --- drivers/ata/libahci.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/ata/libahci.c') diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index d38c40fe4ddb..ff9d832a163d 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -561,6 +561,27 @@ void ahci_start_engine(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; + u8 status; + + status = readl(port_mmio + PORT_TFDATA) & 0xFF; + + /* + * At end of section 10.1 of AHCI spec (rev 1.3), it states + * Software shall not set PxCMD.ST to 1 until it is determined + * that a functoinal device is present on the port as determined by + * PxTFD.STS.BSY=0, PxTFD.STS.DRQ=0 and PxSSTS.DET=3h + * + * Even though most AHCI host controllers work without this check, + * specific controller will fail under this condition + */ + if (status & (ATA_BUSY | ATA_DRQ)) + return; + else { + ahci_scr_read(&ap->link, SCR_STATUS, &tmp); + + if ((tmp & 0xf) != 0x3) + return; + } /* start DMA */ tmp = readl(port_mmio + PORT_CMD); -- cgit v1.2.3