From 82ef04fb4c82542b3eda81cca461f0594ce9cd0b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 31 Jul 2008 17:02:40 +0900 Subject: libata: make SCR access ops per-link Logically, SCR access ops should take @link; however, there was no compelling reason to convert all SCR access ops when adding @link abstraction as there's one-to-one mapping between a port and a non-PMP link. However, that assumption won't hold anymore with the scheduled addition of slave link. Make SCR access ops per-link. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 2e1a7cb..6acea41 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -267,8 +267,8 @@ struct ahci_port_priv { * per PM slot */ }; -static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); @@ -820,10 +820,10 @@ static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) return 0; } -static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { - void __iomem *port_mmio = ahci_port_base(ap); - int offset = ahci_scr_offset(ap, sc_reg); + void __iomem *port_mmio = ahci_port_base(link->ap); + int offset = ahci_scr_offset(link->ap, sc_reg); if (offset) { *val = readl(port_mmio + offset); @@ -832,10 +832,10 @@ static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) return -EINVAL; } -static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { - void __iomem *port_mmio = ahci_port_base(ap); - int offset = ahci_scr_offset(ap, sc_reg); + void __iomem *port_mmio = ahci_port_base(link->ap); + int offset = ahci_scr_offset(link->ap, sc_reg); if (offset) { writel(val, port_mmio + offset); @@ -973,7 +973,7 @@ static void ahci_disable_alpm(struct ata_port *ap) writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT); /* go ahead and clean out PhyRdy Change from Serror too */ - ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18))); + ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18))); /* * Clear flag to indicate that we should ignore all PhyRdy @@ -1937,8 +1937,8 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); /* AHCI needs SError cleared; otherwise, it might lock up */ - ahci_scr_read(ap, SCR_ERROR, &serror); - ahci_scr_write(ap, SCR_ERROR, serror); + ahci_scr_read(&ap->link, SCR_ERROR, &serror); + ahci_scr_write(&ap->link, SCR_ERROR, serror); host_ehi->serror |= serror; /* some controllers set IRQ_IF_ERR on device errors, ignore it */ @@ -2027,7 +2027,7 @@ static void ahci_port_intr(struct ata_port *ap) if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) && (status & PORT_IRQ_PHYRDY)) { status &= ~PORT_IRQ_PHYRDY; - ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18))); + ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18))); } if (unlikely(status & PORT_IRQ_ERROR)) { diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index e6b4606..81387ff 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -165,8 +165,10 @@ static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev); static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev); static int ich_pata_cable_detect(struct ata_port *ap); static u8 piix_vmw_bmdma_status(struct ata_port *ap); -static int piix_sidpr_scr_read(struct ata_port *ap, unsigned int reg, u32 *val); -static int piix_sidpr_scr_write(struct ata_port *ap, unsigned int reg, u32 val); +static int piix_sidpr_scr_read(struct ata_link *link, + unsigned int reg, u32 *val); +static int piix_sidpr_scr_write(struct ata_link *link, + unsigned int reg, u32 val); #ifdef CONFIG_PM static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); static int piix_pci_device_resume(struct pci_dev *pdev); @@ -971,8 +973,10 @@ static u32 piix_merge_scr(u32 val0, u32 val1, const int * const *merge_tbl) return val; } -static int piix_sidpr_scr_read(struct ata_port *ap, unsigned int reg, u32 *val) +static int piix_sidpr_scr_read(struct ata_link *link, + unsigned int reg, u32 *val) { + struct ata_port *ap = link->ap; const int * const sstatus_merge_tbl[] = { /* DET */ (const int []){ 1, 3, 0, 4, 3, -1 }, /* SPD */ (const int []){ 2, 1, 0, -1 }, @@ -1013,8 +1017,11 @@ static int piix_sidpr_scr_read(struct ata_port *ap, unsigned int reg, u32 *val) return 0; } -static int piix_sidpr_scr_write(struct ata_port *ap, unsigned int reg, u32 val) +static int piix_sidpr_scr_write(struct ata_link *link, + unsigned int reg, u32 val) { + struct ata_port *ap = link->ap; + if (reg >= ARRAY_SIZE(piix_sidx_map)) return -EINVAL; diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 79e3a8e..825461a 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4868,10 +4868,8 @@ int sata_scr_valid(struct ata_link *link) int sata_scr_read(struct ata_link *link, int reg, u32 *val) { if (ata_is_host_link(link)) { - struct ata_port *ap = link->ap; - if (sata_scr_valid(link)) - return ap->ops->scr_read(ap, reg, val); + return link->ap->ops->scr_read(link, reg, val); return -EOPNOTSUPP; } @@ -4897,10 +4895,8 @@ int sata_scr_read(struct ata_link *link, int reg, u32 *val) int sata_scr_write(struct ata_link *link, int reg, u32 val) { if (ata_is_host_link(link)) { - struct ata_port *ap = link->ap; - if (sata_scr_valid(link)) - return ap->ops->scr_write(ap, reg, val); + return link->ap->ops->scr_write(link, reg, val); return -EOPNOTSUPP; } @@ -4925,13 +4921,12 @@ int sata_scr_write(struct ata_link *link, int reg, u32 val) int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) { if (ata_is_host_link(link)) { - struct ata_port *ap = link->ap; int rc; if (sata_scr_valid(link)) { - rc = ap->ops->scr_write(ap, reg, val); + rc = link->ap->ops->scr_write(link, reg, val); if (rc == 0) - rc = ap->ops->scr_read(ap, reg, &val); + rc = link->ap->ops->scr_read(link, reg, &val); return rc; } return -EOPNOTSUPP; diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c index 3924e72..1a56db9 100644 --- a/drivers/ata/sata_fsl.c +++ b/drivers/ata/sata_fsl.c @@ -469,10 +469,10 @@ static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc) return true; } -static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in, - u32 val) +static int sata_fsl_scr_write(struct ata_link *link, + unsigned int sc_reg_in, u32 val) { - struct sata_fsl_host_priv *host_priv = ap->host->private_data; + struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; void __iomem *ssr_base = host_priv->ssr_base; unsigned int sc_reg; @@ -493,10 +493,10 @@ static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in, return 0; } -static int sata_fsl_scr_read(struct ata_port *ap, unsigned int sc_reg_in, - u32 *val) +static int sata_fsl_scr_read(struct ata_link *link, + unsigned int sc_reg_in, u32 *val) { - struct sata_fsl_host_priv *host_priv = ap->host->private_data; + struct sata_fsl_host_priv *host_priv = link->ap->host->private_data; void __iomem *ssr_base = host_priv->ssr_base; unsigned int sc_reg; @@ -645,12 +645,12 @@ static int sata_fsl_port_start(struct ata_port *ap) * Workaround for 8315DS board 3gbps link-up issue, * currently limit SATA port to GEN1 speed */ - sata_fsl_scr_read(ap, SCR_CONTROL, &temp); + sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp); temp &= ~(0xF << 4); temp |= (0x1 << 4); - sata_fsl_scr_write(ap, SCR_CONTROL, temp); + sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp); - sata_fsl_scr_read(ap, SCR_CONTROL, &temp); + sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp); dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n", temp); #endif @@ -868,7 +868,7 @@ issue_srst: ioread32(CQ + hcr_base), ioread32(CA + hcr_base), ioread32(CC + hcr_base)); - sata_fsl_scr_read(ap, SCR_ERROR, &Serror); + sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror); DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); @@ -972,9 +972,9 @@ static void sata_fsl_error_intr(struct ata_port *ap) * Handle & Clear SError */ - sata_fsl_scr_read(ap, SCR_ERROR, &SError); + sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); if (unlikely(SError & 0xFFFF0000)) { - sata_fsl_scr_write(ap, SCR_ERROR, SError); + sata_fsl_scr_write(&ap->link, SCR_ERROR, SError); } DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n", @@ -1091,7 +1091,7 @@ static void sata_fsl_host_intr(struct ata_port *ap) hstatus = ioread32(hcr_base + HSTATUS); - sata_fsl_scr_read(ap, SCR_ERROR, &SError); + sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError); if (unlikely(SError & 0xFFFF0000)) { DPRINTK("serror @host_intr : 0x%x\n", SError); diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c index 5032c32..fbbd87c 100644 --- a/drivers/ata/sata_inic162x.c +++ b/drivers/ata/sata_inic162x.c @@ -269,9 +269,9 @@ static void inic_reset_port(void __iomem *port_base) writeb(0xff, port_base + PORT_IRQ_STAT); } -static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) +static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) { - void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR; + void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; void __iomem *addr; if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) @@ -286,9 +286,9 @@ static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) return 0; } -static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) +static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) { - void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR; + void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) return -EINVAL; diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index c815f8e..2b24ae5 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -493,10 +493,10 @@ struct mv_hw_ops { void (*reset_bus)(struct ata_host *host, void __iomem *mmio); }; -static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val); -static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); -static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val); -static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); +static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val); +static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val); +static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val); +static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val); static int mv_port_start(struct ata_port *ap); static void mv_port_stop(struct ata_port *ap); static int mv_qc_defer(struct ata_queued_cmd *qc); @@ -1070,23 +1070,23 @@ static unsigned int mv_scr_offset(unsigned int sc_reg_in) return ofs; } -static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val) +static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val) { unsigned int ofs = mv_scr_offset(sc_reg_in); if (ofs != 0xffffffffU) { - *val = readl(mv_ap_base(ap) + ofs); + *val = readl(mv_ap_base(link->ap) + ofs); return 0; } else return -EINVAL; } -static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) +static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) { unsigned int ofs = mv_scr_offset(sc_reg_in); if (ofs != 0xffffffffU) { - writelfl(val, mv_ap_base(ap) + ofs); + writelfl(val, mv_ap_base(link->ap) + ofs); return 0; } else return -EINVAL; @@ -2251,11 +2251,11 @@ static unsigned int mv5_scr_offset(unsigned int sc_reg_in) return ofs; } -static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val) +static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val) { - struct mv_host_priv *hpriv = ap->host->private_data; + struct mv_host_priv *hpriv = link->ap->host->private_data; void __iomem *mmio = hpriv->base; - void __iomem *addr = mv5_phy_base(mmio, ap->port_no); + void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no); unsigned int ofs = mv5_scr_offset(sc_reg_in); if (ofs != 0xffffffffU) { @@ -2265,11 +2265,11 @@ static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val) return -EINVAL; } -static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) +static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) { - struct mv_host_priv *hpriv = ap->host->private_data; + struct mv_host_priv *hpriv = link->ap->host->private_data; void __iomem *mmio = hpriv->base; - void __iomem *addr = mv5_phy_base(mmio, ap->port_no); + void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no); unsigned int ofs = mv5_scr_offset(sc_reg_in); if (ofs != 0xffffffffU) { diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index 1e1f3f3..88fd4ae 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -302,8 +302,8 @@ static void nv_ck804_host_stop(struct ata_host *host); static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance); static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance); static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance); -static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static void nv_nf2_freeze(struct ata_port *ap); static void nv_nf2_thaw(struct ata_port *ap); @@ -1492,21 +1492,21 @@ static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance) return ret; } -static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4)); + *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } -static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); + iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } @@ -2184,9 +2184,9 @@ static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis) if (!pp->qc_active) return; - if (ap->ops->scr_read(ap, SCR_ERROR, &serror)) + if (ap->ops->scr_read(&ap->link, SCR_ERROR, &serror)) return; - ap->ops->scr_write(ap, SCR_ERROR, serror); + ap->ops->scr_write(&ap->link, SCR_ERROR, serror); if (ata_stat & ATA_ERR) { ata_ehi_clear_desc(ehi); diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c index 030665b..750d8cd 100644 --- a/drivers/ata/sata_promise.c +++ b/drivers/ata/sata_promise.c @@ -137,8 +137,8 @@ struct pdc_port_priv { dma_addr_t pkt_dma; }; -static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static int pdc_common_port_start(struct ata_port *ap); static int pdc_sata_port_start(struct ata_port *ap); @@ -386,19 +386,21 @@ static int pdc_sata_cable_detect(struct ata_port *ap) return ATA_CBL_SATA; } -static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int pdc_sata_scr_read(struct ata_link *link, + unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); + *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } -static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int pdc_sata_scr_write(struct ata_link *link, + unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } @@ -731,7 +733,7 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc, if (sata_scr_valid(&ap->link)) { u32 serror; - pdc_sata_scr_read(ap, SCR_ERROR, &serror); + pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror); ehi->serror |= serror; } diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c index 1600107..a000c86 100644 --- a/drivers/ata/sata_qstor.c +++ b/drivers/ata/sata_qstor.c @@ -111,8 +111,8 @@ struct qs_port_priv { qs_state_t state; }; -static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static int qs_port_start(struct ata_port *ap); static void qs_host_stop(struct ata_host *host); @@ -242,11 +242,11 @@ static int qs_prereset(struct ata_link *link, unsigned long deadline) return ata_sff_prereset(link, deadline); } -static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = readl(ap->ioaddr.scr_addr + (sc_reg * 8)); + *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 8)); return 0; } @@ -256,11 +256,11 @@ static void qs_error_handler(struct ata_port *ap) ata_std_error_handler(ap); } -static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - writel(val, ap->ioaddr.scr_addr + (sc_reg * 8)); + writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 8)); return 0; } diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c index 88bf421..031d7b7 100644 --- a/drivers/ata/sata_sil.c +++ b/drivers/ata/sata_sil.c @@ -115,8 +115,8 @@ static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static int sil_pci_device_resume(struct pci_dev *pdev); #endif static void sil_dev_config(struct ata_device *dev); -static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed); static void sil_freeze(struct ata_port *ap); static void sil_thaw(struct ata_port *ap); @@ -317,9 +317,9 @@ static inline void __iomem *sil_scr_addr(struct ata_port *ap, return NULL; } -static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { - void __iomem *mmio = sil_scr_addr(ap, sc_reg); + void __iomem *mmio = sil_scr_addr(link->ap, sc_reg); if (mmio) { *val = readl(mmio); @@ -328,9 +328,9 @@ static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) return -EINVAL; } -static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { - void __iomem *mmio = sil_scr_addr(ap, sc_reg); + void __iomem *mmio = sil_scr_addr(link->ap, sc_reg); if (mmio) { writel(val, mmio); @@ -352,8 +352,8 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2) * controllers continue to assert IRQ as long as * SError bits are pending. Clear SError immediately. */ - sil_scr_read(ap, SCR_ERROR, &serror); - sil_scr_write(ap, SCR_ERROR, serror); + sil_scr_read(&ap->link, SCR_ERROR, &serror); + sil_scr_write(&ap->link, SCR_ERROR, serror); /* Sometimes spurious interrupts occur, double check * it's PHYRDY CHG. diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c index 84ffcc2..4621807 100644 --- a/drivers/ata/sata_sil24.c +++ b/drivers/ata/sata_sil24.c @@ -340,8 +340,8 @@ struct sil24_port_priv { }; static void sil24_dev_config(struct ata_device *dev); -static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val); -static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); +static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val); +static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val); static int sil24_qc_defer(struct ata_queued_cmd *qc); static void sil24_qc_prep(struct ata_queued_cmd *qc); static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); @@ -504,9 +504,9 @@ static int sil24_scr_map[] = { [SCR_ACTIVE] = 3, }; -static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) +static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) { - void __iomem *scr_addr = sil24_port_base(ap) + PORT_SCONTROL; + void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { void __iomem *addr; @@ -517,9 +517,9 @@ static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val) return -EINVAL; } -static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) +static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) { - void __iomem *scr_addr = sil24_port_base(ap) + PORT_SCONTROL; + void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { void __iomem *addr; diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c index 1010b30..9c43b4e 100644 --- a/drivers/ata/sata_sis.c +++ b/drivers/ata/sata_sis.c @@ -64,8 +64,8 @@ enum { }; static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); -static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static const struct pci_device_id sis_pci_tbl[] = { { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */ @@ -134,10 +134,11 @@ static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg) return addr; } -static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static u32 sis_scr_cfg_read(struct ata_link *link, + unsigned int sc_reg, u32 *val) { - struct pci_dev *pdev = to_pci_dev(ap->host->dev); - unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); + struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); + unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg); u32 val2 = 0; u8 pmr; @@ -158,10 +159,11 @@ static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) return 0; } -static int sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int sis_scr_cfg_write(struct ata_link *link, + unsigned int sc_reg, u32 val) { - struct pci_dev *pdev = to_pci_dev(ap->host->dev); - unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); + struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); + unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg); u8 pmr; if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ @@ -178,8 +180,9 @@ static int sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val) return 0; } -static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { + struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 pmr; @@ -187,7 +190,7 @@ static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) return -EINVAL; if (ap->flags & SIS_FLAG_CFGSCR) - return sis_scr_cfg_read(ap, sc_reg, val); + return sis_scr_cfg_read(link, sc_reg, val); pci_read_config_byte(pdev, SIS_PMR, &pmr); @@ -202,8 +205,9 @@ static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) return 0; } -static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { + struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 pmr; @@ -213,7 +217,7 @@ static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) pci_read_config_byte(pdev, SIS_PMR, &pmr); if (ap->flags & SIS_FLAG_CFGSCR) - return sis_scr_cfg_write(ap, sc_reg, val); + return sis_scr_cfg_write(link, sc_reg, val); else { iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c index fb13b82..609d147 100644 --- a/drivers/ata/sata_svw.c +++ b/drivers/ata/sata_svw.c @@ -123,20 +123,22 @@ static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc) } } -static int k2_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int k2_sata_scr_read(struct ata_link *link, + unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); + *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } -static int k2_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int k2_sata_scr_write(struct ata_link *link, + unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c index db529b8..019575b 100644 --- a/drivers/ata/sata_uli.c +++ b/drivers/ata/sata_uli.c @@ -57,8 +57,8 @@ struct uli_priv { }; static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); -static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static const struct pci_device_id uli_pci_tbl[] = { { PCI_VDEVICE(AL, 0x5289), uli_5289 }, @@ -107,39 +107,39 @@ static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg) return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg); } -static u32 uli_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg) +static u32 uli_scr_cfg_read(struct ata_link *link, unsigned int sc_reg) { - struct pci_dev *pdev = to_pci_dev(ap->host->dev); - unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg); + struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); + unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg); u32 val; pci_read_config_dword(pdev, cfg_addr, &val); return val; } -static void uli_scr_cfg_write(struct ata_port *ap, unsigned int scr, u32 val) +static void uli_scr_cfg_write(struct ata_link *link, unsigned int scr, u32 val) { - struct pci_dev *pdev = to_pci_dev(ap->host->dev); - unsigned int cfg_addr = get_scr_cfg_addr(ap, scr); + struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); + unsigned int cfg_addr = get_scr_cfg_addr(link->ap, scr); pci_write_config_dword(pdev, cfg_addr, val); } -static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = uli_scr_cfg_read(ap, sc_reg); + *val = uli_scr_cfg_read(link, sc_reg); return 0; } -static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0 return -EINVAL; - uli_scr_cfg_write(ap, sc_reg, val); + uli_scr_cfg_write(link, sc_reg, val); return 0; } diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c index 96deeb3..1cfa745 100644 --- a/drivers/ata/sata_via.c +++ b/drivers/ata/sata_via.c @@ -68,8 +68,8 @@ enum { }; static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); -static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); -static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); +static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static void svia_noop_freeze(struct ata_port *ap); static int vt6420_prereset(struct ata_link *link, unsigned long deadline); static int vt6421_pata_cable_detect(struct ata_port *ap); @@ -152,19 +152,19 @@ MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, svia_pci_tbl); MODULE_VERSION(DRV_VERSION); -static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg)); + *val = ioread32(link->ap->ioaddr.scr_addr + (4 * sc_reg)); return 0; } -static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg)); + iowrite32(val, link->ap->ioaddr.scr_addr + (4 * sc_reg)); return 0; } @@ -210,20 +210,20 @@ static int vt6420_prereset(struct ata_link *link, unsigned long deadline) goto skip_scr; /* Resume phy. This is the old SATA resume sequence */ - svia_scr_write(ap, SCR_CONTROL, 0x300); - svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */ + svia_scr_write(link, SCR_CONTROL, 0x300); + svia_scr_read(link, SCR_CONTROL, &scontrol); /* flush */ /* wait for phy to become ready, if necessary */ do { msleep(200); - svia_scr_read(ap, SCR_STATUS, &sstatus); + svia_scr_read(link, SCR_STATUS, &sstatus); if ((sstatus & 0xf) != 1) break; } while (time_before(jiffies, timeout)); /* open code sata_print_link_status() */ - svia_scr_read(ap, SCR_STATUS, &sstatus); - svia_scr_read(ap, SCR_CONTROL, &scontrol); + svia_scr_read(link, SCR_STATUS, &sstatus); + svia_scr_read(link, SCR_CONTROL, &scontrol); online = (sstatus & 0xf) == 0x3; @@ -232,7 +232,7 @@ static int vt6420_prereset(struct ata_link *link, unsigned long deadline) online ? "up" : "down", sstatus, scontrol); /* SStatus is read one more time */ - svia_scr_read(ap, SCR_STATUS, &sstatus); + svia_scr_read(link, SCR_STATUS, &sstatus); if (!online) { /* tell EH to bail */ diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c index f3d635c..c57cdff 100644 --- a/drivers/ata/sata_vsc.c +++ b/drivers/ata/sata_vsc.c @@ -98,20 +98,22 @@ enum { VSC_SATA_INT_PHY_CHANGE), }; -static int vsc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) +static int vsc_sata_scr_read(struct ata_link *link, + unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4)); + *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } -static int vsc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) +static int vsc_sata_scr_write(struct ata_link *link, + unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; - writel(val, ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); return 0; } diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 48ee8c7..e187298 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -294,10 +294,10 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc) } } -static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, +static int sas_ata_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) { - struct domain_device *dev = ap->private_data; + struct domain_device *dev = link->ap->private_data; SAS_DPRINTK("STUB %s\n", __func__); switch (sc_reg_in) { @@ -319,10 +319,10 @@ static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, return 0; } -static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in, +static int sas_ata_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val) { - struct domain_device *dev = ap->private_data; + struct domain_device *dev = link->ap->private_data; SAS_DPRINTK("STUB %s\n", __func__); switch (sc_reg_in) { diff --git a/include/linux/libata.h b/include/linux/libata.h index 225bfc5..ffd622f 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -772,8 +772,8 @@ struct ata_port_operations { /* * Optional features */ - int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val); - int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val); + int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); + int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); void (*pmp_attach)(struct ata_port *ap); void (*pmp_detach)(struct ata_port *ap); int (*enable_pm)(struct ata_port *ap, enum link_pm policy); -- cgit v0.10.2 From aadffb682cc5572f48cc24883681db65530bd284 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 31 Jul 2008 17:02:41 +0900 Subject: libata: reimplement link iterator Implement __ata_port_next_link() and reimplement __ata_port_for_each_link() and ata_port_for_each_link() using it. This removes relatively large inlined code and makes iteration easier to extend. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 825461a..d156616 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -163,6 +163,35 @@ MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); +/* + * Iterator helpers. Don't use directly. + * + * LOCKING: + * Host lock or EH context. + */ +struct ata_link *__ata_port_next_link(struct ata_port *ap, + struct ata_link *link, bool dev_only) +{ + /* NULL link indicates start of iteration */ + if (!link) { + if (dev_only && sata_pmp_attached(ap)) + return ap->pmp_link; + return &ap->link; + } + + /* we just iterated over the host link, what's next? */ + if (ata_is_host_link(link)) { + if (!sata_pmp_attached(ap)) + return NULL; + return ap->pmp_link; + } + + /* iterate to the next PMP link */ + if (++link < ap->pmp_link + ap->nr_pmp_links) + return link; + return NULL; +} + /** * ata_force_cbl - force cable type according to libata.force * @ap: ATA port of interest @@ -6255,6 +6284,7 @@ EXPORT_SYMBOL_GPL(ata_base_port_ops); EXPORT_SYMBOL_GPL(sata_port_ops); EXPORT_SYMBOL_GPL(ata_dummy_port_ops); EXPORT_SYMBOL_GPL(ata_dummy_port_info); +EXPORT_SYMBOL_GPL(__ata_port_next_link); EXPORT_SYMBOL_GPL(ata_std_bios_param); EXPORT_SYMBOL_GPL(ata_host_init); EXPORT_SYMBOL_GPL(ata_host_alloc); diff --git a/include/linux/libata.h b/include/linux/libata.h index ffd622f..3eaca34 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1265,34 +1265,17 @@ static inline int ata_link_active(struct ata_link *link) return ata_tag_valid(link->active_tag) || link->sactive; } -static inline struct ata_link *ata_port_first_link(struct ata_port *ap) -{ - if (sata_pmp_attached(ap)) - return ap->pmp_link; - return &ap->link; -} - -static inline struct ata_link *ata_port_next_link(struct ata_link *link) -{ - struct ata_port *ap = link->ap; - - if (ata_is_host_link(link)) { - if (!sata_pmp_attached(ap)) - return NULL; - return ap->pmp_link; - } - - if (++link < ap->nr_pmp_links + ap->pmp_link) - return link; - return NULL; -} +extern struct ata_link *__ata_port_next_link(struct ata_port *ap, + struct ata_link *link, + bool dev_only); -#define __ata_port_for_each_link(lk, ap) \ - for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk)) +#define __ata_port_for_each_link(link, ap) \ + for ((link) = __ata_port_next_link((ap), NULL, false); (link); \ + (link) = __ata_port_next_link((ap), (link), false)) #define ata_port_for_each_link(link, ap) \ - for ((link) = ata_port_first_link(ap); (link); \ - (link) = ata_port_next_link(link)) + for ((link) = __ata_port_next_link((ap), NULL, true); (link); \ + (link) = __ata_port_next_link((ap), (link), true)) #define ata_link_for_each_dev(dev, link) \ for ((dev) = (link)->device; \ -- cgit v0.10.2 From b5b3fa386b8f96c7fa92e507e5deddc2637924b4 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 31 Jul 2008 17:02:42 +0900 Subject: libata: misc updates to prepare for slave link * Add ATA_EH_ALL_ACTIONS. * Make sata_link_{on|off}_line() return bool instead of int. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index d156616..71024e9 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4976,16 +4976,16 @@ int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) * None. * * RETURNS: - * 1 if the port online status is available and online. + * True if the port online status is available and online. */ -int ata_link_online(struct ata_link *link) +bool ata_link_online(struct ata_link *link) { u32 sstatus; if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && (sstatus & 0xf) == 0x3) - return 1; - return 0; + return true; + return false; } /** @@ -5000,16 +5000,16 @@ int ata_link_online(struct ata_link *link) * None. * * RETURNS: - * 1 if the port offline status is available and offline. + * True if the port offline status is available and offline. */ -int ata_link_offline(struct ata_link *link) +bool ata_link_offline(struct ata_link *link) { u32 sstatus; if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && (sstatus & 0xf) != 0x3) - return 1; - return 0; + return true; + return false; } #ifdef CONFIG_PM diff --git a/include/linux/libata.h b/include/linux/libata.h index 3eaca34..0c7e6f3 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -321,6 +321,8 @@ enum { ATA_EH_LPM = (1 << 4), /* link power management action */ ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, + ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | + ATA_EH_ENABLE_LINK | ATA_EH_LPM, /* ata_eh_info->flags */ ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ @@ -920,8 +922,8 @@ extern int sata_scr_valid(struct ata_link *link); extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); extern int sata_scr_write(struct ata_link *link, int reg, u32 val); extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); -extern int ata_link_online(struct ata_link *link); -extern int ata_link_offline(struct ata_link *link); +extern bool ata_link_online(struct ata_link *link); +extern bool ata_link_offline(struct ata_link *link); #ifdef CONFIG_PM extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); extern void ata_host_resume(struct ata_host *host); -- cgit v0.10.2 From b1c72916abbdd0a55015c87358536ca0ebaf6735 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 31 Jul 2008 17:02:43 +0900 Subject: libata: implement slave_link Explanation taken from the comment of ata_slave_link_init(). In libata, a port contains links and a link contains devices. There is single host link but if a PMP is attached to it, there can be multiple fan-out links. On SATA, there's usually a single device connected to a link but PATA and SATA controllers emulating TF based interface can have two - master and slave. However, there are a few controllers which don't fit into this abstraction too well - SATA controllers which emulate TF interface with both master and slave devices but also have separate SCR register sets for each device. These controllers need separate links for physical link handling (e.g. onlineness, link speed) but should be treated like a traditional M/S controller for everything else (e.g. command issue, softreset). slave_link is libata's way of handling this class of controllers without impacting core layer too much. For anything other than physical link handling, the default host link is used for both master and slave. For physical link handling, separate @ap->slave_link is used. All dirty details are implemented inside libata core layer. From LLD's POV, the only difference is that prereset, hardreset and postreset are called once more for the slave link, so the reset sequence looks like the following. prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> softreset(M) -> postreset(M) -> postreset(S) Note that softreset is called only for the master. Softreset resets both M/S by definition, so SRST on master should handle both (the standard method will work just fine). As slave_link excludes PMP support and only code paths which deal with the attributes of physical link are affected, all the changes are localized to libata.h, libata-core.c and libata-eh.c. * ata_is_host_link() updated so that slave_link is considered as host link too. * iterator extended to iterate over the slave_link when using the underbarred version. * force param handling updated such that devno 16 is mapped to the slave link/device. * ata_link_on/offline() updated to return the combined result from master and slave link. ata_phys_link_on/offline() are the direct versions. * EH autopsy and report are performed separately for master slave links. Reset is udpated to implement the above described reset sequence. Except for reset update, most changes are minor, many of them just modifying dev->link to ata_dev_phys_link(dev) or using phys online test instead. After this update, LLDs can take full advantage of per-dev SCR registers by simply turning on slave link. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 71024e9..6eed58e 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -179,13 +179,20 @@ struct ata_link *__ata_port_next_link(struct ata_port *ap, return &ap->link; } - /* we just iterated over the host link, what's next? */ - if (ata_is_host_link(link)) { - if (!sata_pmp_attached(ap)) + /* we just iterated over the host master link, what's next? */ + if (link == &ap->link) { + if (!sata_pmp_attached(ap)) { + if (unlikely(ap->slave_link) && !dev_only) + return ap->slave_link; return NULL; + } return ap->pmp_link; } + /* slave_link excludes PMP */ + if (unlikely(link == ap->slave_link)) + return NULL; + /* iterate to the next PMP link */ if (++link < ap->pmp_link + ap->nr_pmp_links) return link; @@ -193,6 +200,31 @@ struct ata_link *__ata_port_next_link(struct ata_port *ap, } /** + * ata_dev_phys_link - find physical link for a device + * @dev: ATA device to look up physical link for + * + * Look up physical link which @dev is attached to. Note that + * this is different from @dev->link only when @dev is on slave + * link. For all other cases, it's the same as @dev->link. + * + * LOCKING: + * Don't care. + * + * RETURNS: + * Pointer to the found physical link. + */ +struct ata_link *ata_dev_phys_link(struct ata_device *dev) +{ + struct ata_port *ap = dev->link->ap; + + if (!ap->slave_link) + return dev->link; + if (!dev->devno) + return &ap->link; + return ap->slave_link; +} + +/** * ata_force_cbl - force cable type according to libata.force * @ap: ATA port of interest * @@ -235,7 +267,8 @@ void ata_force_cbl(struct ata_port *ap) * the host link and all fan-out ports connected via PMP. If the * device part is specified as 0 (e.g. 1.00:), it specifies the * first fan-out link not the host link. Device number 15 always - * points to the host link whether PMP is attached or not. + * points to the host link whether PMP is attached or not. If the + * controller has slave link, device number 16 points to it. * * LOCKING: * EH context. @@ -243,12 +276,11 @@ void ata_force_cbl(struct ata_port *ap) static void ata_force_link_limits(struct ata_link *link) { bool did_spd = false; - int linkno, i; + int linkno = link->pmp; + int i; if (ata_is_host_link(link)) - linkno = 15; - else - linkno = link->pmp; + linkno += 15; for (i = ata_force_tbl_size - 1; i >= 0; i--) { const struct ata_force_ent *fe = &ata_force_tbl[i]; @@ -295,9 +327,9 @@ static void ata_force_xfermask(struct ata_device *dev) int alt_devno = devno; int i; - /* allow n.15 for the first device attached to host port */ - if (ata_is_host_link(dev->link) && devno == 0) - alt_devno = 15; + /* allow n.15/16 for devices attached to host port */ + if (ata_is_host_link(dev->link)) + alt_devno += 15; for (i = ata_force_tbl_size - 1; i >= 0; i--) { const struct ata_force_ent *fe = &ata_force_tbl[i]; @@ -349,9 +381,9 @@ static void ata_force_horkage(struct ata_device *dev) int alt_devno = devno; int i; - /* allow n.15 for the first device attached to host port */ - if (ata_is_host_link(dev->link) && devno == 0) - alt_devno = 15; + /* allow n.15/16 for devices attached to host port */ + if (ata_is_host_link(dev->link)) + alt_devno += 15; for (i = 0; i < ata_force_tbl_size; i++) { const struct ata_force_ent *fe = &ata_force_tbl[i]; @@ -2710,7 +2742,7 @@ static void sata_print_link_status(struct ata_link *link) return; sata_scr_read(link, SCR_CONTROL, &scontrol); - if (ata_link_online(link)) { + if (ata_phys_link_online(link)) { tmp = (sstatus >> 4) & 0xf; ata_link_printk(link, KERN_INFO, "SATA link up %s (SStatus %X SControl %X)\n", @@ -3401,6 +3433,12 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline, unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); int warned = 0; + /* Slave readiness can't be tested separately from master. On + * M/S emulation configuration, this function should be called + * only on the master and it will handle both master and slave. + */ + WARN_ON(link == link->ap->slave_link); + if (time_after(nodev_deadline, deadline)) nodev_deadline = deadline; @@ -3622,7 +3660,7 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline) } /* no point in trying softreset on offline link */ - if (ata_link_offline(link)) + if (ata_phys_link_offline(link)) ehc->i.action &= ~ATA_EH_SOFTRESET; return 0; @@ -3700,7 +3738,7 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, if (rc) goto out; /* if link is offline nothing more to do */ - if (ata_link_offline(link)) + if (ata_phys_link_offline(link)) goto out; /* Link is online. From this point, -ENODEV too is an error. */ @@ -4965,7 +5003,7 @@ int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) } /** - * ata_link_online - test whether the given link is online + * ata_phys_link_online - test whether the given link is online * @link: ATA link to test * * Test whether @link is online. Note that this function returns @@ -4978,7 +5016,7 @@ int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) * RETURNS: * True if the port online status is available and online. */ -bool ata_link_online(struct ata_link *link) +bool ata_phys_link_online(struct ata_link *link) { u32 sstatus; @@ -4989,7 +5027,7 @@ bool ata_link_online(struct ata_link *link) } /** - * ata_link_offline - test whether the given link is offline + * ata_phys_link_offline - test whether the given link is offline * @link: ATA link to test * * Test whether @link is offline. Note that this function @@ -5002,7 +5040,7 @@ bool ata_link_online(struct ata_link *link) * RETURNS: * True if the port offline status is available and offline. */ -bool ata_link_offline(struct ata_link *link) +bool ata_phys_link_offline(struct ata_link *link) { u32 sstatus; @@ -5012,6 +5050,58 @@ bool ata_link_offline(struct ata_link *link) return false; } +/** + * ata_link_online - test whether the given link is online + * @link: ATA link to test + * + * Test whether @link is online. This is identical to + * ata_phys_link_online() when there's no slave link. When + * there's a slave link, this function should only be called on + * the master link and will return true if any of M/S links is + * online. + * + * LOCKING: + * None. + * + * RETURNS: + * True if the port online status is available and online. + */ +bool ata_link_online(struct ata_link *link) +{ + struct ata_link *slave = link->ap->slave_link; + + WARN_ON(link == slave); /* shouldn't be called on slave link */ + + return ata_phys_link_online(link) || + (slave && ata_phys_link_online(slave)); +} + +/** + * ata_link_offline - test whether the given link is offline + * @link: ATA link to test + * + * Test whether @link is offline. This is identical to + * ata_phys_link_offline() when there's no slave link. When + * there's a slave link, this function should only be called on + * the master link and will return true if both M/S links are + * offline. + * + * LOCKING: + * None. + * + * RETURNS: + * True if the port offline status is available and offline. + */ +bool ata_link_offline(struct ata_link *link) +{ + struct ata_link *slave = link->ap->slave_link; + + WARN_ON(link == slave); /* shouldn't be called on slave link */ + + return ata_phys_link_offline(link) && + (!slave || ata_phys_link_offline(slave)); +} + #ifdef CONFIG_PM static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, unsigned int action, unsigned int ehi_flags, @@ -5151,11 +5241,11 @@ int ata_port_start(struct ata_port *ap) */ void ata_dev_init(struct ata_device *dev) { - struct ata_link *link = dev->link; + struct ata_link *link = ata_dev_phys_link(dev); struct ata_port *ap = link->ap; unsigned long flags; - /* SATA spd limit is bound to the first device */ + /* SATA spd limit is bound to the attached device, reset together */ link->sata_spd_limit = link->hw_sata_spd_limit; link->sata_spd = 0; @@ -5318,6 +5408,7 @@ static void ata_host_release(struct device *gendev, void *res) scsi_host_put(ap->scsi_host); kfree(ap->pmp_link); + kfree(ap->slave_link); kfree(ap); host->ports[i] = NULL; } @@ -5438,6 +5529,68 @@ struct ata_host *ata_host_alloc_pinfo(struct device *dev, return host; } +/** + * ata_slave_link_init - initialize slave link + * @ap: port to initialize slave link for + * + * Create and initialize slave link for @ap. This enables slave + * link handling on the port. + * + * In libata, a port contains links and a link contains devices. + * There is single host link but if a PMP is attached to it, + * there can be multiple fan-out links. On SATA, there's usually + * a single device connected to a link but PATA and SATA + * controllers emulating TF based interface can have two - master + * and slave. + * + * However, there are a few controllers which don't fit into this + * abstraction too well - SATA controllers which emulate TF + * interface with both master and slave devices but also have + * separate SCR register sets for each device. These controllers + * need separate links for physical link handling + * (e.g. onlineness, link speed) but should be treated like a + * traditional M/S controller for everything else (e.g. command + * issue, softreset). + * + * slave_link is libata's way of handling this class of + * controllers without impacting core layer too much. For + * anything other than physical link handling, the default host + * link is used for both master and slave. For physical link + * handling, separate @ap->slave_link is used. All dirty details + * are implemented inside libata core layer. From LLD's POV, the + * only difference is that prereset, hardreset and postreset are + * called once more for the slave link, so the reset sequence + * looks like the following. + * + * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> + * softreset(M) -> postreset(M) -> postreset(S) + * + * Note that softreset is called only for the master. Softreset + * resets both M/S by definition, so SRST on master should handle + * both (the standard method will work just fine). + * + * LOCKING: + * Should be called before host is registered. + * + * RETURNS: + * 0 on success, -errno on failure. + */ +int ata_slave_link_init(struct ata_port *ap) +{ + struct ata_link *link; + + WARN_ON(ap->slave_link); + WARN_ON(ap->flags & ATA_FLAG_PMP); + + link = kzalloc(sizeof(*link), GFP_KERNEL); + if (!link) + return -ENOMEM; + + ata_link_init(ap, link, 1); + ap->slave_link = link; + return 0; +} + static void ata_host_stop(struct device *gendev, void *res) { struct ata_host *host = dev_get_drvdata(gendev); @@ -5664,6 +5817,8 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) /* init sata_spd_limit to the current value */ sata_link_init_spd(&ap->link); + if (ap->slave_link) + sata_link_init_spd(ap->slave_link); /* print per-port info to dmesg */ xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, @@ -6289,6 +6444,7 @@ EXPORT_SYMBOL_GPL(ata_std_bios_param); EXPORT_SYMBOL_GPL(ata_host_init); EXPORT_SYMBOL_GPL(ata_host_alloc); EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); +EXPORT_SYMBOL_GPL(ata_slave_link_init); EXPORT_SYMBOL_GPL(ata_host_start); EXPORT_SYMBOL_GPL(ata_host_register); EXPORT_SYMBOL_GPL(ata_host_activate); diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index c1db2f2..99037a4 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1756,7 +1756,7 @@ static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) static unsigned int ata_eh_speed_down(struct ata_device *dev, unsigned int eflags, unsigned int err_mask) { - struct ata_link *link = dev->link; + struct ata_link *link = ata_dev_phys_link(dev); int xfer_ok = 0; unsigned int verdict; unsigned int action = 0; @@ -1880,7 +1880,8 @@ static void ata_eh_link_autopsy(struct ata_link *link) for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); - if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link) + if (!(qc->flags & ATA_QCFLAG_FAILED) || + ata_dev_phys_link(qc->dev) != link) continue; /* inherit upper level err_mask */ @@ -1967,6 +1968,23 @@ void ata_eh_autopsy(struct ata_port *ap) ata_port_for_each_link(link, ap) ata_eh_link_autopsy(link); + /* Handle the frigging slave link. Autopsy is done similarly + * but actions and flags are transferred over to the master + * link and handled from there. + */ + if (ap->slave_link) { + struct ata_eh_context *mehc = &ap->link.eh_context; + struct ata_eh_context *sehc = &ap->slave_link->eh_context; + + ata_eh_link_autopsy(ap->slave_link); + + ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); + mehc->i.action |= sehc->i.action; + mehc->i.dev_action[1] |= sehc->i.dev_action[1]; + mehc->i.flags |= sehc->i.flags; + ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); + } + /* Autopsy of fanout ports can affect host link autopsy. * Perform host link autopsy last. */ @@ -2001,7 +2019,8 @@ static void ata_eh_link_report(struct ata_link *link) for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); - if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link || + if (!(qc->flags & ATA_QCFLAG_FAILED) || + ata_dev_phys_link(qc->dev) != link || ((qc->flags & ATA_QCFLAG_QUIET) && qc->err_mask == AC_ERR_DEV)) continue; @@ -2068,7 +2087,7 @@ static void ata_eh_link_report(struct ata_link *link) char cdb_buf[70] = ""; if (!(qc->flags & ATA_QCFLAG_FAILED) || - qc->dev->link != link || !qc->err_mask) + ata_dev_phys_link(qc->dev) != link || !qc->err_mask) continue; if (qc->dma_dir != DMA_NONE) { @@ -2160,12 +2179,14 @@ void ata_eh_report(struct ata_port *ap) } static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, - unsigned int *classes, unsigned long deadline) + unsigned int *classes, unsigned long deadline, + bool clear_classes) { struct ata_device *dev; - ata_link_for_each_dev(dev, link) - classes[dev->devno] = ATA_DEV_UNKNOWN; + if (clear_classes) + ata_link_for_each_dev(dev, link) + classes[dev->devno] = ATA_DEV_UNKNOWN; return reset(link, classes, deadline); } @@ -2187,17 +2208,20 @@ int ata_eh_reset(struct ata_link *link, int classify, ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) { struct ata_port *ap = link->ap; + struct ata_link *slave = ap->slave_link; struct ata_eh_context *ehc = &link->eh_context; + struct ata_eh_context *sehc = &slave->eh_context; unsigned int *classes = ehc->classes; unsigned int lflags = link->flags; int verbose = !(ehc->i.flags & ATA_EHI_QUIET); int max_tries = 0, try = 0; + struct ata_link *failed_link; struct ata_device *dev; unsigned long deadline, now; ata_reset_fn_t reset; unsigned long flags; u32 sstatus; - int nr_known, rc; + int nr_unknown, rc; /* * Prepare to reset @@ -2252,8 +2276,30 @@ int ata_eh_reset(struct ata_link *link, int classify, } if (prereset) { - rc = prereset(link, - ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT)); + unsigned long deadline = ata_deadline(jiffies, + ATA_EH_PRERESET_TIMEOUT); + + if (slave) { + sehc->i.action &= ~ATA_EH_RESET; + sehc->i.action |= ehc->i.action; + } + + rc = prereset(link, deadline); + + /* If present, do prereset on slave link too. Reset + * is skipped iff both master and slave links report + * -ENOENT or clear ATA_EH_RESET. + */ + if (slave && (rc == 0 || rc == -ENOENT)) { + int tmp; + + tmp = prereset(slave, deadline); + if (tmp != -ENOENT) + rc = tmp; + + ehc->i.action |= sehc->i.action; + } + if (rc) { if (rc == -ENOENT) { ata_link_printk(link, KERN_DEBUG, @@ -2302,25 +2348,51 @@ int ata_eh_reset(struct ata_link *link, int classify, else ehc->i.flags |= ATA_EHI_DID_SOFTRESET; - rc = ata_do_reset(link, reset, classes, deadline); - if (rc && rc != -EAGAIN) + rc = ata_do_reset(link, reset, classes, deadline, true); + if (rc && rc != -EAGAIN) { + failed_link = link; goto fail; + } + + /* hardreset slave link if existent */ + if (slave && reset == hardreset) { + int tmp; + + if (verbose) + ata_link_printk(slave, KERN_INFO, + "hard resetting link\n"); + ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); + tmp = ata_do_reset(slave, reset, classes, deadline, + false); + switch (tmp) { + case -EAGAIN: + rc = -EAGAIN; + case 0: + break; + default: + failed_link = slave; + rc = tmp; + goto fail; + } + } + + /* perform follow-up SRST if necessary */ if (reset == hardreset && ata_eh_followup_srst_needed(link, rc, classes)) { - /* okay, let's do follow-up softreset */ reset = softreset; if (!reset) { ata_link_printk(link, KERN_ERR, "follow-up softreset required " "but no softreset avaliable\n"); + failed_link = link; rc = -EINVAL; goto fail; } ata_eh_about_to_do(link, NULL, ATA_EH_RESET); - rc = ata_do_reset(link, reset, classes, deadline); + rc = ata_do_reset(link, reset, classes, deadline, true); } } else { if (verbose) @@ -2341,7 +2413,7 @@ int ata_eh_reset(struct ata_link *link, int classify, dev->pio_mode = XFER_PIO_0; dev->flags &= ~ATA_DFLAG_SLEEPING; - if (ata_link_offline(link)) + if (ata_phys_link_offline(ata_dev_phys_link(dev))) continue; /* apply class override */ @@ -2354,6 +2426,8 @@ int ata_eh_reset(struct ata_link *link, int classify, /* record current link speed */ if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) link->sata_spd = (sstatus >> 4) & 0xf; + if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) + slave->sata_spd = (sstatus >> 4) & 0xf; /* thaw the port */ if (ata_is_host_link(link)) @@ -2366,12 +2440,17 @@ int ata_eh_reset(struct ata_link *link, int classify, * reset and here. This race is mediated by cross checking * link onlineness and classification result later. */ - if (postreset) + if (postreset) { postreset(link, classes); + if (slave) + postreset(slave, classes); + } /* clear cached SError */ spin_lock_irqsave(link->ap->lock, flags); link->eh_info.serror = 0; + if (slave) + slave->eh_info.serror = 0; spin_unlock_irqrestore(link->ap->lock, flags); /* Make sure onlineness and classification result correspond. @@ -2381,19 +2460,21 @@ int ata_eh_reset(struct ata_link *link, int classify, * link onlineness and classification result, those conditions * can be reliably detected and retried. */ - nr_known = 0; + nr_unknown = 0; ata_link_for_each_dev(dev, link) { /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ - if (classes[dev->devno] == ATA_DEV_UNKNOWN) + if (classes[dev->devno] == ATA_DEV_UNKNOWN) { classes[dev->devno] = ATA_DEV_NONE; - else - nr_known++; + if (ata_phys_link_online(ata_dev_phys_link(dev))) + nr_unknown++; + } } - if (classify && !nr_known && ata_link_online(link)) { + if (classify && nr_unknown) { if (try < max_tries) { ata_link_printk(link, KERN_WARNING, "link online but " "device misclassified, retrying\n"); + failed_link = link; rc = -EAGAIN; goto fail; } @@ -2404,6 +2485,8 @@ int ata_eh_reset(struct ata_link *link, int classify, /* reset successful, schedule revalidation */ ata_eh_done(link, NULL, ATA_EH_RESET); + if (slave) + ata_eh_done(slave, NULL, ATA_EH_RESET); ehc->last_reset = jiffies; ehc->i.action |= ATA_EH_REVALIDATE; @@ -2411,6 +2494,8 @@ int ata_eh_reset(struct ata_link *link, int classify, out: /* clear hotplug flag */ ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; + if (slave) + sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; spin_lock_irqsave(ap->lock, flags); ap->pflags &= ~ATA_PFLAG_RESETTING; @@ -2431,7 +2516,7 @@ int ata_eh_reset(struct ata_link *link, int classify, if (time_before(now, deadline)) { unsigned long delta = deadline - now; - ata_link_printk(link, KERN_WARNING, + ata_link_printk(failed_link, KERN_WARNING, "reset failed (errno=%d), retrying in %u secs\n", rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); @@ -2439,8 +2524,13 @@ int ata_eh_reset(struct ata_link *link, int classify, delta = schedule_timeout_uninterruptible(delta); } - if (rc == -EPIPE || try == max_tries - 1) + if (try == max_tries - 1) { sata_down_spd_limit(link); + if (slave) + sata_down_spd_limit(slave); + } else if (rc == -EPIPE) + sata_down_spd_limit(failed_link); + if (hardreset) reset = hardreset; goto retry; @@ -2472,7 +2562,7 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link, if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { WARN_ON(dev->class == ATA_DEV_PMP); - if (ata_link_offline(link)) { + if (ata_phys_link_offline(ata_dev_phys_link(dev))) { rc = -EIO; goto err; } @@ -2697,7 +2787,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) /* This is the last chance, better to slow * down than lose it. */ - sata_down_spd_limit(dev->link); + sata_down_spd_limit(ata_dev_phys_link(dev)); ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); } } @@ -2707,7 +2797,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) ata_dev_disable(dev); /* detach if offline */ - if (ata_link_offline(dev->link)) + if (ata_phys_link_offline(ata_dev_phys_link(dev))) ata_eh_detach_dev(dev); /* schedule probe if necessary */ diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index ade5c75..e96de96 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -70,6 +70,7 @@ extern int atapi_passthru16; extern int libata_fua; extern int libata_noacpi; extern int libata_allow_tpm; +extern struct ata_link *ata_dev_phys_link(struct ata_device *dev); extern void ata_force_cbl(struct ata_port *ap); extern u64 ata_tf_to_lba(const struct ata_taskfile *tf); extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf); @@ -107,6 +108,8 @@ extern void ata_qc_issue(struct ata_queued_cmd *qc); extern void __ata_qc_complete(struct ata_queued_cmd *qc); extern int atapi_check_dma(struct ata_queued_cmd *qc); extern void swap_buf_le16(u16 *buf, unsigned int buf_words); +extern bool ata_phys_link_online(struct ata_link *link); +extern bool ata_phys_link_offline(struct ata_link *link); extern void ata_dev_init(struct ata_device *dev); extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp); extern int sata_link_init_spd(struct ata_link *link); diff --git a/include/linux/libata.h b/include/linux/libata.h index 0c7e6f3..244ff60 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -690,7 +690,8 @@ struct ata_port { unsigned int qc_active; int nr_active_links; /* #links with active qcs */ - struct ata_link link; /* host default link */ + struct ata_link link; /* host default link */ + struct ata_link *slave_link; /* see ata_slave_link_init() */ int nr_pmp_links; /* nr of available PMP links */ struct ata_link *pmp_link; /* array of PMP links */ @@ -897,6 +898,7 @@ extern void ata_port_disable(struct ata_port *); extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, const struct ata_port_info * const * ppi, int n_ports); +extern int ata_slave_link_init(struct ata_port *ap); extern int ata_host_start(struct ata_host *host); extern int ata_host_register(struct ata_host *host, struct scsi_host_template *sht); @@ -1136,7 +1138,7 @@ static inline bool sata_pmp_attached(struct ata_port *ap) static inline int ata_is_host_link(const struct ata_link *link) { - return link == &link->ap->link; + return link == &link->ap->link || link == link->ap->slave_link; } #else /* CONFIG_SATA_PMP */ static inline bool sata_pmp_supported(struct ata_port *ap) @@ -1169,7 +1171,7 @@ static inline int sata_srst_pmp(struct ata_link *link) printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) #define ata_link_printk(link, lv, fmt, args...) do { \ - if (sata_pmp_attached((link)->ap)) \ + if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ (link)->pmp , ##args); \ else \ -- cgit v0.10.2 From be77e43abb433c2d6f2fc69352289e34dcbf040a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 31 Jul 2008 17:02:44 +0900 Subject: ata_piix: drop merged SCR access and use slave_link instead Now that libata has slave_link, there's no need to keep ugly merged SCR access. Drop it and use slave_link instead. This results in simpler code and much better separate link handling for master and slave. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 81387ff..9d8cb80 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -887,23 +887,9 @@ static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev) * Serial ATA Index/Data Pair Superset Registers access * * Beginning from ICH8, there's a sane way to access SCRs using index - * and data register pair located at BAR5. This creates an - * interesting problem of mapping two SCRs to one port. - * - * Although they have separate SCRs, the master and slave aren't - * independent enough to be treated as separate links - e.g. softreset - * resets both. Also, there's no protocol defined for hard resetting - * singled device sharing the virtual port (no defined way to acquire - * device signature). This is worked around by merging the SCR values - * into one sensible value and requesting follow-up SRST after - * hardreset. - * - * SCR merging is perfomed in nibbles which is the unit contents in - * SCRs are organized. If two values are equal, the value is used. - * When they differ, merge table which lists precedence of possible - * values is consulted and the first match or the last entry when - * nothing matches is used. When there's no merge table for the - * specific nibble, value from the first port is used. + * and data register pair located at BAR5 which means that we have + * separate SCRs for master and slave. This is handled using libata + * slave_link facility. */ static const int piix_sidx_map[] = { [SCR_STATUS] = 0, @@ -911,125 +897,38 @@ static const int piix_sidx_map[] = { [SCR_CONTROL] = 1, }; -static void piix_sidpr_sel(struct ata_device *dev, unsigned int reg) +static void piix_sidpr_sel(struct ata_link *link, unsigned int reg) { - struct ata_port *ap = dev->link->ap; + struct ata_port *ap = link->ap; struct piix_host_priv *hpriv = ap->host->private_data; - iowrite32(((ap->port_no * 2 + dev->devno) << 8) | piix_sidx_map[reg], + iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg], hpriv->sidpr + PIIX_SIDPR_IDX); } -static int piix_sidpr_read(struct ata_device *dev, unsigned int reg) -{ - struct piix_host_priv *hpriv = dev->link->ap->host->private_data; - - piix_sidpr_sel(dev, reg); - return ioread32(hpriv->sidpr + PIIX_SIDPR_DATA); -} - -static void piix_sidpr_write(struct ata_device *dev, unsigned int reg, u32 val) -{ - struct piix_host_priv *hpriv = dev->link->ap->host->private_data; - - piix_sidpr_sel(dev, reg); - iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA); -} - -static u32 piix_merge_scr(u32 val0, u32 val1, const int * const *merge_tbl) -{ - u32 val = 0; - int i, mi; - - for (i = 0, mi = 0; i < 32 / 4; i++) { - u8 c0 = (val0 >> (i * 4)) & 0xf; - u8 c1 = (val1 >> (i * 4)) & 0xf; - u8 merged = c0; - const int *cur; - - /* if no merge preference, assume the first value */ - cur = merge_tbl[mi]; - if (!cur) - goto done; - mi++; - - /* if two values equal, use it */ - if (c0 == c1) - goto done; - - /* choose the first match or the last from the merge table */ - while (*cur != -1) { - if (c0 == *cur || c1 == *cur) - break; - cur++; - } - if (*cur == -1) - cur--; - merged = *cur; - done: - val |= merged << (i * 4); - } - - return val; -} - static int piix_sidpr_scr_read(struct ata_link *link, unsigned int reg, u32 *val) { - struct ata_port *ap = link->ap; - const int * const sstatus_merge_tbl[] = { - /* DET */ (const int []){ 1, 3, 0, 4, 3, -1 }, - /* SPD */ (const int []){ 2, 1, 0, -1 }, - /* IPM */ (const int []){ 6, 2, 1, 0, -1 }, - NULL, - }; - const int * const scontrol_merge_tbl[] = { - /* DET */ (const int []){ 1, 0, 4, 0, -1 }, - /* SPD */ (const int []){ 0, 2, 1, 0, -1 }, - /* IPM */ (const int []){ 0, 1, 2, 3, 0, -1 }, - NULL, - }; - u32 v0, v1; + struct piix_host_priv *hpriv = link->ap->host->private_data; if (reg >= ARRAY_SIZE(piix_sidx_map)) return -EINVAL; - if (!(ap->flags & ATA_FLAG_SLAVE_POSS)) { - *val = piix_sidpr_read(&ap->link.device[0], reg); - return 0; - } - - v0 = piix_sidpr_read(&ap->link.device[0], reg); - v1 = piix_sidpr_read(&ap->link.device[1], reg); - - switch (reg) { - case SCR_STATUS: - *val = piix_merge_scr(v0, v1, sstatus_merge_tbl); - break; - case SCR_ERROR: - *val = v0 | v1; - break; - case SCR_CONTROL: - *val = piix_merge_scr(v0, v1, scontrol_merge_tbl); - break; - } - + piix_sidpr_sel(link, reg); + *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA); return 0; } static int piix_sidpr_scr_write(struct ata_link *link, unsigned int reg, u32 val) { - struct ata_port *ap = link->ap; + struct piix_host_priv *hpriv = link->ap->host->private_data; if (reg >= ARRAY_SIZE(piix_sidx_map)) return -EINVAL; - piix_sidpr_write(&ap->link.device[0], reg, val); - - if (ap->flags & ATA_FLAG_SLAVE_POSS) - piix_sidpr_write(&ap->link.device[1], reg, val); - + piix_sidpr_sel(link, reg); + iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA); return 0; } @@ -1370,28 +1269,28 @@ static const int *__devinit piix_init_sata_map(struct pci_dev *pdev, return map; } -static void __devinit piix_init_sidpr(struct ata_host *host) +static int __devinit piix_init_sidpr(struct ata_host *host) { struct pci_dev *pdev = to_pci_dev(host->dev); struct piix_host_priv *hpriv = host->private_data; - struct ata_device *dev0 = &host->ports[0]->link.device[0]; + struct ata_link *link0 = &host->ports[0]->link; u32 scontrol; - int i; + int i, rc; /* check for availability */ for (i = 0; i < 4; i++) if (hpriv->map[i] == IDE) - return; + return 0; if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR)) - return; + return 0; if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 || pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN) - return; + return 0; if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME)) - return; + return 0; hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR]; @@ -1399,7 +1298,7 @@ static void __devinit piix_init_sidpr(struct ata_host *host) * Give it a test drive by inhibiting power save modes which * we'll do anyway. */ - scontrol = piix_sidpr_read(dev0, SCR_CONTROL); + piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol); /* if IPM is already 3, SCR access is probably working. Don't * un-inhibit power save modes as BIOS might have inhibited @@ -1407,18 +1306,30 @@ static void __devinit piix_init_sidpr(struct ata_host *host) */ if ((scontrol & 0xf00) != 0x300) { scontrol |= 0x300; - piix_sidpr_write(dev0, SCR_CONTROL, scontrol); - scontrol = piix_sidpr_read(dev0, SCR_CONTROL); + piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol); + piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol); if ((scontrol & 0xf00) != 0x300) { dev_printk(KERN_INFO, host->dev, "SCR access via " "SIDPR is available but doesn't work\n"); - return; + return 0; } } - host->ports[0]->ops = &piix_sidpr_sata_ops; - host->ports[1]->ops = &piix_sidpr_sata_ops; + /* okay, SCRs available, set ops and ask libata for slave_link */ + for (i = 0; i < 2; i++) { + struct ata_port *ap = host->ports[i]; + + ap->ops = &piix_sidpr_sata_ops; + + if (ap->flags & ATA_FLAG_SLAVE_POSS) { + rc = ata_slave_link_init(ap); + if (rc) + return rc; + } + } + + return 0; } static void piix_iocfg_bit18_quirk(struct pci_dev *pdev) @@ -1528,7 +1439,9 @@ static int __devinit piix_init_one(struct pci_dev *pdev, /* initialize controller */ if (port_flags & ATA_FLAG_SATA) { piix_init_pcs(host, piix_map_db_table[ent->driver_data]); - piix_init_sidpr(host); + rc = piix_init_sidpr(host); + if (rc) + return rc; } /* apply IOCFG bit18 quirk */ -- cgit v0.10.2 From 2ad69677b626fc311783b47af25dfecf7be2845b Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Fri, 26 Sep 2008 18:12:52 +0100 Subject: PATA: RPC now selects HAVE_PATA_PLATFORM for pata platform driver The RPC machine type now selects HAVE_PATA_PLATFORM so we can remove the special case in the PATA_PLATFORM configuration code. Cc: Russell King Signed-off-by: Ben Dooks Signed-off-by: Jeff Garzik diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 11c8c19..f17cd4b 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -663,7 +663,7 @@ config HAVE_PATA_PLATFORM config PATA_PLATFORM tristate "Generic platform device PATA support" - depends on EMBEDDED || ARCH_RPC || PPC || HAVE_PATA_PLATFORM + depends on EMBEDDED || PPC || HAVE_PATA_PLATFORM help This option enables support for generic directly connected ATA devices commonly found on embedded systems. -- cgit v0.10.2 From ea6ce53cd5d005455ec0a3cc1d45d3af0cb90919 Mon Sep 17 00:00:00 2001 From: Elias Oltmanns Date: Fri, 19 Sep 2008 23:46:01 +0200 Subject: [libata] Introduce ata_id_has_unload() Add a function to check an ATA device's id for head unload support as specified in ATA-7. Signed-off-by: Elias Oltmanns Signed-off-by: Jeff Garzik diff --git a/include/linux/ata.h b/include/linux/ata.h index 8a12d71..a26ebd2 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -667,6 +667,15 @@ static inline int ata_id_has_dword_io(const u16 *id) return 0; } +static inline int ata_id_has_unload(const u16 *id) +{ + if (ata_id_major_version(id) >= 7 && + (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 && + id[ATA_ID_CFSSE] & (1 << 13)) + return 1; + return 0; +} + static inline int ata_id_current_chs_valid(const u16 *id) { /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command -- cgit v0.10.2 From 45fabbb77bd95adff7a80bde1c7a0ace1075fde6 Mon Sep 17 00:00:00 2001 From: Elias Oltmanns Date: Sun, 21 Sep 2008 11:54:08 +0200 Subject: libata: Implement disk shock protection support On user request (through sysfs), the IDLE IMMEDIATE command with UNLOAD FEATURE as specified in ATA-7 is issued to the device and processing of the request queue is stopped thereafter until the specified timeout expires or user space asks to resume normal operation. This is supposed to prevent the heads of a hard drive from accidentally crashing onto the platter when a heavy shock is anticipated (like a falling laptop expected to hit the floor). In fact, the whole port stops processing commands until the timeout has expired in order to avoid any resets due to failed commands on another device. Signed-off-by: Elias Oltmanns Signed-off-by: Jeff Garzik diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 6acea41..aeadd00 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -316,6 +316,7 @@ static struct device_attribute *ahci_shost_attrs[] = { static struct device_attribute *ahci_sdev_attrs[] = { &dev_attr_sw_activity, + &dev_attr_unload_heads, NULL }; diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6eed58e..1ee9499 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5378,6 +5378,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host) INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); INIT_LIST_HEAD(&ap->eh_done_q); init_waitqueue_head(&ap->eh_wait_q); + init_completion(&ap->park_req_pending); init_timer_deferrable(&ap->fastdrain_timer); ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; ap->fastdrain_timer.data = (unsigned long)ap; diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 99037a4..33ac5ea 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2536,6 +2536,80 @@ int ata_eh_reset(struct ata_link *link, int classify, goto retry; } +static inline void ata_eh_pull_park_action(struct ata_port *ap) +{ + struct ata_link *link; + struct ata_device *dev; + unsigned long flags; + + /* + * This function can be thought of as an extended version of + * ata_eh_about_to_do() specially crafted to accommodate the + * requirements of ATA_EH_PARK handling. Since the EH thread + * does not leave the do {} while () loop in ata_eh_recover as + * long as the timeout for a park request to *one* device on + * the port has not expired, and since we still want to pick + * up park requests to other devices on the same port or + * timeout updates for the same device, we have to pull + * ATA_EH_PARK actions from eh_info into eh_context.i + * ourselves at the beginning of each pass over the loop. + * + * Additionally, all write accesses to &ap->park_req_pending + * through INIT_COMPLETION() (see below) or complete_all() + * (see ata_scsi_park_store()) are protected by the host lock. + * As a result we have that park_req_pending.done is zero on + * exit from this function, i.e. when ATA_EH_PARK actions for + * *all* devices on port ap have been pulled into the + * respective eh_context structs. If, and only if, + * park_req_pending.done is non-zero by the time we reach + * wait_for_completion_timeout(), another ATA_EH_PARK action + * has been scheduled for at least one of the devices on port + * ap and we have to cycle over the do {} while () loop in + * ata_eh_recover() again. + */ + + spin_lock_irqsave(ap->lock, flags); + INIT_COMPLETION(ap->park_req_pending); + ata_port_for_each_link(link, ap) { + ata_link_for_each_dev(dev, link) { + struct ata_eh_info *ehi = &link->eh_info; + + link->eh_context.i.dev_action[dev->devno] |= + ehi->dev_action[dev->devno] & ATA_EH_PARK; + ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); + } + } + spin_unlock_irqrestore(ap->lock, flags); +} + +static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) +{ + struct ata_eh_context *ehc = &dev->link->eh_context; + struct ata_taskfile tf; + unsigned int err_mask; + + ata_tf_init(dev, &tf); + if (park) { + ehc->unloaded_mask |= 1 << dev->devno; + tf.command = ATA_CMD_IDLEIMMEDIATE; + tf.feature = 0x44; + tf.lbal = 0x4c; + tf.lbam = 0x4e; + tf.lbah = 0x55; + } else { + ehc->unloaded_mask &= ~(1 << dev->devno); + tf.command = ATA_CMD_CHK_POWER; + } + + tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf.protocol |= ATA_PROT_NODATA; + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); + if (park && (err_mask || tf.lbal != 0xc4)) { + ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); + ehc->unloaded_mask &= ~(1 << dev->devno); + } +} + static int ata_eh_revalidate_and_attach(struct ata_link *link, struct ata_device **r_failed_dev) { @@ -2845,7 +2919,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, struct ata_device *dev; int nr_failed_devs; int rc; - unsigned long flags; + unsigned long flags, deadline; DPRINTK("ENTER\n"); @@ -2919,6 +2993,56 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, } } + do { + unsigned long now; + + /* + * clears ATA_EH_PARK in eh_info and resets + * ap->park_req_pending + */ + ata_eh_pull_park_action(ap); + + deadline = jiffies; + ata_port_for_each_link(link, ap) { + ata_link_for_each_dev(dev, link) { + struct ata_eh_context *ehc = &link->eh_context; + unsigned long tmp; + + if (dev->class != ATA_DEV_ATA) + continue; + if (!(ehc->i.dev_action[dev->devno] & + ATA_EH_PARK)) + continue; + tmp = dev->unpark_deadline; + if (time_before(deadline, tmp)) + deadline = tmp; + else if (time_before_eq(tmp, jiffies)) + continue; + if (ehc->unloaded_mask & (1 << dev->devno)) + continue; + + ata_eh_park_issue_cmd(dev, 1); + } + } + + now = jiffies; + if (time_before_eq(deadline, now)) + break; + + deadline = wait_for_completion_timeout(&ap->park_req_pending, + deadline - now); + } while (deadline); + ata_port_for_each_link(link, ap) { + ata_link_for_each_dev(dev, link) { + if (!(link->eh_context.unloaded_mask & + (1 << dev->devno))) + continue; + + ata_eh_park_issue_cmd(dev, 0); + ata_eh_done(link, dev, ATA_EH_PARK); + } + } + /* the rest */ ata_port_for_each_link(link, ap) { struct ata_eh_context *ehc = &link->eh_context; diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index b9d3ba4..fccd5e4 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -183,6 +183,105 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, ata_scsi_lpm_show, ata_scsi_lpm_put); EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); +static ssize_t ata_scsi_park_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct scsi_device *sdev = to_scsi_device(device); + struct ata_port *ap; + struct ata_link *link; + struct ata_device *dev; + unsigned long flags; + unsigned int uninitialized_var(msecs); + int rc = 0; + + ap = ata_shost_to_port(sdev->host); + + spin_lock_irqsave(ap->lock, flags); + dev = ata_scsi_find_dev(ap, sdev); + if (!dev) { + rc = -ENODEV; + goto unlock; + } + if (dev->flags & ATA_DFLAG_NO_UNLOAD) { + rc = -EOPNOTSUPP; + goto unlock; + } + + link = dev->link; + if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && + link->eh_context.unloaded_mask & (1 << dev->devno) && + time_after(dev->unpark_deadline, jiffies)) + msecs = jiffies_to_msecs(dev->unpark_deadline - jiffies); + else + msecs = 0; + +unlock: + spin_unlock_irq(ap->lock); + + return rc ? rc : snprintf(buf, 20, "%u\n", msecs); +} + +static ssize_t ata_scsi_park_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct scsi_device *sdev = to_scsi_device(device); + struct ata_port *ap; + struct ata_device *dev; + long int input; + unsigned long flags; + int rc; + + rc = strict_strtol(buf, 10, &input); + if (rc || input < -2) + return -EINVAL; + if (input > ATA_TMOUT_MAX_PARK) { + rc = -EOVERFLOW; + input = ATA_TMOUT_MAX_PARK; + } + + ap = ata_shost_to_port(sdev->host); + + spin_lock_irqsave(ap->lock, flags); + dev = ata_scsi_find_dev(ap, sdev); + if (unlikely(!dev)) { + rc = -ENODEV; + goto unlock; + } + if (dev->class != ATA_DEV_ATA) { + rc = -EOPNOTSUPP; + goto unlock; + } + + if (input >= 0) { + if (dev->flags & ATA_DFLAG_NO_UNLOAD) { + rc = -EOPNOTSUPP; + goto unlock; + } + + dev->unpark_deadline = ata_deadline(jiffies, input); + dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; + ata_port_schedule_eh(ap); + complete(&ap->park_req_pending); + } else { + switch (input) { + case -1: + dev->flags &= ~ATA_DFLAG_NO_UNLOAD; + break; + case -2: + dev->flags |= ATA_DFLAG_NO_UNLOAD; + break; + } + } +unlock: + spin_unlock_irqrestore(ap->lock, flags); + + return rc ? rc : len; +} +DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, + ata_scsi_park_show, ata_scsi_park_store); +EXPORT_SYMBOL_GPL(dev_attr_unload_heads); + static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) { cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; @@ -269,6 +368,12 @@ DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show, ata_scsi_activity_store); EXPORT_SYMBOL_GPL(dev_attr_sw_activity); +struct device_attribute *ata_common_sdev_attrs[] = { + &dev_attr_unload_heads, + NULL +}; +EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); + static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { @@ -954,6 +1059,9 @@ static int atapi_drain_needed(struct request *rq) static int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) { + if (!ata_id_has_unload(dev->id)) + dev->flags |= ATA_DFLAG_NO_UNLOAD; + /* configure max sectors */ blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); diff --git a/include/linux/libata.h b/include/linux/libata.h index 244ff60..1f44cfb 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -146,6 +146,7 @@ enum { ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ + ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ ATA_DFLAG_INIT_MASK = (1 << 24) - 1, ATA_DFLAG_DETACH = (1 << 24), @@ -244,6 +245,7 @@ enum { ATA_TMOUT_BOOT = 30000, /* heuristic */ ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ ATA_TMOUT_INTERNAL_QUICK = 5000, + ATA_TMOUT_MAX_PARK = 30000, /* FIXME: GoVault needs 2s but we can't afford that without * parallel probing. 800ms is enough for iVDR disk @@ -319,8 +321,9 @@ enum { ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, ATA_EH_ENABLE_LINK = (1 << 3), ATA_EH_LPM = (1 << 4), /* link power management action */ + ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ - ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, + ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | ATA_EH_ENABLE_LINK | ATA_EH_LPM, @@ -454,6 +457,7 @@ enum link_pm { MEDIUM_POWER, }; extern struct device_attribute dev_attr_link_power_management_policy; +extern struct device_attribute dev_attr_unload_heads; extern struct device_attribute dev_attr_em_message_type; extern struct device_attribute dev_attr_em_message; extern struct device_attribute dev_attr_sw_activity; @@ -566,6 +570,7 @@ struct ata_device { /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ u64 n_sectors; /* size of device, if ATA */ unsigned int class; /* ATA_DEV_xxx */ + unsigned long unpark_deadline; u8 pio_mode; u8 dma_mode; @@ -623,6 +628,7 @@ struct ata_eh_context { [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; unsigned int classes[ATA_MAX_DEVICES]; unsigned int did_probe_mask; + unsigned int unloaded_mask; unsigned int saved_ncq_enabled; u8 saved_xfer_mode[ATA_MAX_DEVICES]; /* timestamp for the last reset attempt or success */ @@ -712,6 +718,7 @@ struct ata_port { struct list_head eh_done_q; wait_queue_head_t eh_wait_q; int eh_tries; + struct completion park_req_pending; pm_message_t pm_mesg; int *pm_result; @@ -1102,6 +1109,7 @@ extern void ata_std_error_handler(struct ata_port *ap); */ extern const struct ata_port_operations ata_base_port_ops; extern const struct ata_port_operations sata_port_ops; +extern struct device_attribute *ata_common_sdev_attrs[]; #define ATA_BASE_SHT(drv_name) \ .module = THIS_MODULE, \ @@ -1116,7 +1124,8 @@ extern const struct ata_port_operations sata_port_ops; .proc_name = drv_name, \ .slave_configure = ata_scsi_slave_config, \ .slave_destroy = ata_scsi_slave_destroy, \ - .bios_param = ata_std_bios_param + .bios_param = ata_std_bios_param, \ + .sdev_attrs = ata_common_sdev_attrs #define ATA_NCQ_SHT(drv_name) \ ATA_BASE_SHT(drv_name), \ -- cgit v0.10.2 From 47d692a946f12c299c21536fff6b39369311f002 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Mon, 22 Sep 2008 14:47:33 -0700 Subject: pata_sil680: convert CONFIG_PPC_MERGE to CONFIG_PPC Now that arch/ppc is dead CONFIG_PPC_MERGE is always defined for all powerpc platforms and we want to get rid of CONFIG_PPC_MERGE use CONFIG_PPC instead. Signed-off-by: Kumar Gala Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c index e970b22..a598bb3 100644 --- a/drivers/ata/pata_sil680.c +++ b/drivers/ata/pata_sil680.c @@ -230,7 +230,7 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio) tmpbyte & 1, tmpbyte & 0x30); *try_mmio = 0; -#ifdef CONFIG_PPC_MERGE +#ifdef CONFIG_PPC if (machine_is(cell)) *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5); #endif -- cgit v0.10.2 From 67e3e221d61c0e70b2f244fd921e5e601d6c7339 Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Mon, 22 Sep 2008 14:47:10 -0700 Subject: [libata] pata_bf54x: Add proper PM operation [akpm@linux-foundation.org: remove ifdefs, make things static] Signed-off-by: Sonic Zhang Signed-off-by: Bryan Wu Cc: Jeff Garzik Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c index d393290..1266924 100644 --- a/drivers/ata/pata_bf54x.c +++ b/drivers/ata/pata_bf54x.c @@ -1632,6 +1632,8 @@ static int __devinit bfin_atapi_probe(struct platform_device *pdev) return -ENODEV; } + dev_set_drvdata(&pdev->dev, host); + return 0; } @@ -1648,6 +1650,7 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev) struct ata_host *host = dev_get_drvdata(dev); ata_host_detach(host); + dev_set_drvdata(&pdev->dev, NULL); peripheral_free_list(atapi_io_port); @@ -1655,27 +1658,44 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev) } #ifdef CONFIG_PM -int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state) +static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state) { - return 0; + struct ata_host *host = dev_get_drvdata(&pdev->dev); + if (host) + return ata_host_suspend(host, state); + else + return 0; } -int bfin_atapi_resume(struct platform_device *pdev) +static int bfin_atapi_resume(struct platform_device *pdev) { + struct ata_host *host = dev_get_drvdata(&pdev->dev); + int ret; + + if (host) { + ret = bfin_reset_controller(host); + if (ret) { + printk(KERN_ERR DRV_NAME ": Error during HW init\n"); + return ret; + } + ata_host_resume(host); + } + return 0; } +#else +#define bfin_atapi_suspend NULL +#define bfin_atapi_resume NULL #endif static struct platform_driver bfin_atapi_driver = { .probe = bfin_atapi_probe, .remove = __devexit_p(bfin_atapi_remove), + .suspend = bfin_atapi_suspend, + .resume = bfin_atapi_resume, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, -#ifdef CONFIG_PM - .suspend = bfin_atapi_suspend, - .resume = bfin_atapi_resume, -#endif }, }; -- cgit v0.10.2 From 6866e7bc83f13a1bc6de59099930e9db1ab0042f Mon Sep 17 00:00:00 2001 From: Richard Kennedy Date: Mon, 22 Sep 2008 14:47:13 -0700 Subject: libata: reorder ata_device to remove 8 bytes of padding on 64 bits reduce size by 8 bytes from 1160 to 1152 allowing it to fit in 1 fewer cachelines. Signed-off-by: Richard Kennedy Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik diff --git a/include/linux/libata.h b/include/linux/libata.h index 1f44cfb..947cf84 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -560,8 +560,8 @@ struct ata_ering { struct ata_device { struct ata_link *link; unsigned int devno; /* 0 or 1 */ - unsigned long flags; /* ATA_DFLAG_xxx */ unsigned int horkage; /* List of broken features */ + unsigned long flags; /* ATA_DFLAG_xxx */ struct scsi_device *sdev; /* attached SCSI device */ #ifdef CONFIG_ATA_ACPI acpi_handle acpi_handle; -- cgit v0.10.2 From d09addf65cb5b3b19a536aa3329efeedbc6bb56c Mon Sep 17 00:00:00 2001 From: Herton Ronaldo Krzesinski Date: Wed, 17 Sep 2008 14:29:05 -0300 Subject: ata_piix: add Hercules EC-900 mini-notebook to ich_laptop short cable list Signed-off-by: Herton Ronaldo Krzesinski Signed-off-by: Jeff Garzik diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 9d8cb80..c7db1dc 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -584,6 +584,7 @@ static const struct ich_laptop ich_laptop[] = { { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */ { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */ { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */ + { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */ { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */ { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */ { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */ -- cgit v0.10.2 From 11fc33da8d8413d6bfa5143f454dfcb998c27617 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 30 Aug 2008 14:20:01 +0200 Subject: libata-eh: clear UNIT ATTENTION after reset Resets make ATAPI devices raise UNIT ATTENTION which fails the next command. As resets can happen asynchronously for unrelated reasons, this sometimes disrupts innocent users. For example, reading DVD fails after the system wakes up from suspend or the other device sharing the channel went through bus error. Clearing UA has some problems as it might clear UA which the userland needs to know about. However, UA after resets can only be about the reset itself and benefits of clearing it overweights cons. Missing UA can only delay failure to one of the following commands anyway. For example, timeout while burning is in progress will trigger reset and reset the device state and probably corrupt the burning run. Although the userland application won't get the UA, its pending writes will fail. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 33ac5ea..f2dd991 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -79,6 +79,8 @@ enum { */ ATA_EH_PRERESET_TIMEOUT = 10000, ATA_EH_FASTDRAIN_INTERVAL = 3000, + + ATA_EH_UA_TRIES = 5, }; /* The following table determines how we sequence resets. Each entry @@ -1357,6 +1359,37 @@ static int ata_eh_read_log_10h(struct ata_device *dev, } /** + * atapi_eh_tur - perform ATAPI TEST_UNIT_READY + * @dev: target ATAPI device + * @r_sense_key: out parameter for sense_key + * + * Perform ATAPI TEST_UNIT_READY. + * + * LOCKING: + * EH context (may sleep). + * + * RETURNS: + * 0 on success, AC_ERR_* mask on failure. + */ +static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) +{ + u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; + struct ata_taskfile tf; + unsigned int err_mask; + + ata_tf_init(dev, &tf); + + tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf.command = ATA_CMD_PACKET; + tf.protocol = ATAPI_PROT_NODATA; + + err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); + if (err_mask == AC_ERR_DEV) + *r_sense_key = tf.feature >> 4; + return err_mask; +} + +/** * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE * @dev: device to perform REQUEST_SENSE to * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) @@ -2774,6 +2807,53 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) return rc; } +/** + * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset + * @dev: ATAPI device to clear UA for + * + * Resets and other operations can make an ATAPI device raise + * UNIT ATTENTION which causes the next operation to fail. This + * function clears UA. + * + * LOCKING: + * EH context (may sleep). + * + * RETURNS: + * 0 on success, -errno on failure. + */ +static int atapi_eh_clear_ua(struct ata_device *dev) +{ + int i; + + for (i = 0; i < ATA_EH_UA_TRIES; i++) { + u8 sense_buffer[SCSI_SENSE_BUFFERSIZE]; + u8 sense_key = 0; + unsigned int err_mask; + + err_mask = atapi_eh_tur(dev, &sense_key); + if (err_mask != 0 && err_mask != AC_ERR_DEV) { + ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " + "failed (err_mask=0x%x)\n", err_mask); + return -EIO; + } + + if (!err_mask || sense_key != UNIT_ATTENTION) + return 0; + + err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); + if (err_mask) { + ata_dev_printk(dev, KERN_WARNING, "failed to clear " + "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); + return -EIO; + } + } + + ata_dev_printk(dev, KERN_WARNING, + "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); + + return 0; +} + static int ata_link_nr_enabled(struct ata_link *link) { struct ata_device *dev; @@ -3066,6 +3146,20 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, ehc->i.flags &= ~ATA_EHI_SETMODE; } + /* If reset has been issued, clear UA to avoid + * disrupting the current users of the device. + */ + if (ehc->i.flags & ATA_EHI_DID_RESET) { + ata_link_for_each_dev(dev, link) { + if (dev->class != ATA_DEV_ATAPI) + continue; + rc = atapi_eh_clear_ua(dev); + if (rc) + goto dev_fail; + } + } + + /* configure link power saving */ if (ehc->i.action & ATA_EH_LPM) ata_link_for_each_dev(dev, link) ata_dev_enable_pm(dev, ap->pm_policy); -- cgit v0.10.2 From 0395e61babd59c749fb5efe112affbfaa7d50eb7 Mon Sep 17 00:00:00 2001 From: Seth Heasley Date: Wed, 27 Aug 2008 16:40:06 -0700 Subject: ata_piix: IDE Mode SATA patch for Intel Ibex Peak DeviceIDs This patch updates the Intel Ibex Peak (PCH) IDE mode SATA Controller DeviceIDs. Signed-off-by: Seth Heasley Signed-off-by: Jeff Garzik diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index c7db1dc..e9e32ed 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -280,12 +280,15 @@ static const struct pci_device_id piix_pci_tbl[] = { /* SATA Controller IDE (PCH) */ { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata }, /* SATA Controller IDE (PCH) */ + { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, + /* SATA Controller IDE (PCH) */ { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, /* SATA Controller IDE (PCH) */ + { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata }, + /* SATA Controller IDE (PCH) */ { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, /* SATA Controller IDE (PCH) */ { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata }, - { } /* terminate list */ }; -- cgit v0.10.2