Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

Pull libata updates from Tejun Heo:
 "Nothing too interesting. Mostly ahci and ahci_platform changes, many
  around power management"

* 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (22 commits)
  ata: ahci_platform: enable to get and control reset
  ata: libahci_platform: add reset control support
  ata: add an extra argument to ahci_platform_get_resources()
  ata: sata_rcar: Add r8a77965 support
  ata: sata_rcar: exclude setting of PHY registers in Gen3
  ata: sata_rcar: really mask all interrupts on Gen2 and later
  Revert "ata: ahci_platform: allow disabling of hotplug to save power"
  ata: libahci: Allow reconfigure of DEVSLP register
  ata: libahci: Correct setting of DEVSLP register
  ata: ahci: Enable DEVSLP by default on x86 with SLP_S0
  ata: ahci: Support state with min power but Partial low power state
  Revert "ata: ahci_platform: convert kcalloc to devm_kcalloc"
  ata: sata_rcar: Add rudimentary Runtime PM support
  ata: sata_rcar: Provide a short-hand for &pdev->dev
  ata: Only output sg element mapped number in verbose debug
  ata: Guard ata_scsi_dump_cdb() by ATA_VERBOSE_DEBUG
  ata: ahci_platform: convert kcalloc to devm_kcalloc
  ata: ahci_platform: convert kzallloc to kcalloc
  ata: ahci_platform: correct parameter documentation for ahci_platform_shutdown
  libata: remove ata_sff_data_xfer_noirq()
  ...

Documentation/devicetree/bindings/ata/ahci-platform.txt

@@ -29,6 +29,7 @@ compatible:
 Optional properties:
 - dma-coherent      : Present if dma operations are coherent
 - clocks            : a list of phandle + clock specifier pairs
+- resets            : a list of phandle + reset specifier pairs
 - target-supply     : regulator for SATA target power
 - phys              : reference to the SATA PHY node
 - phy-names         : must be "sata-phy"

Documentation/devicetree/bindings/ata/sata_rcar.txt

@@ -8,6 +8,7 @@ Required properties:
 			  - "renesas,sata-r8a7791" for R-Car M2-W
 			  - "renesas,sata-r8a7793" for R-Car M2-N
 			  - "renesas,sata-r8a7795" for R-Car H3
+			  - "renesas,sata-r8a77965" for R-Car M3-N
 			  - "renesas,rcar-gen2-sata" for a generic R-Car Gen2 compatible device
 			  - "renesas,rcar-gen3-sata" for a generic R-Car Gen3 compatible device
 			  - "renesas,rcar-sata" is deprecated

Documentation/driver-api/libata.rst

@@ -118,8 +118,7 @@ PIO data read/write
 All bmdma-style drivers must implement this hook. This is the low-level
 operation that actually copies the data bytes during a PIO data
 transfer. Typically the driver will choose one of
-:c:func:`ata_sff_data_xfer_noirq`, :c:func:`ata_sff_data_xfer`, or
-:c:func:`ata_sff_data_xfer32`.
+:c:func:`ata_sff_data_xfer`, or :c:func:`ata_sff_data_xfer32`.
 
 ATA command execute
 ~~~~~~~~~~~~~~~~~~~

drivers/ata/ahci.c

@@ -610,7 +610,7 @@ static int marvell_enable = 1;
 module_param(marvell_enable, int, 0644);
 MODULE_PARM_DESC(marvell_enable, "Marvell SATA via AHCI (1 = enabled)");
 
-static int mobile_lpm_policy = CONFIG_SATA_MOBILE_LPM_POLICY;
+static int mobile_lpm_policy = -1;
 module_param(mobile_lpm_policy, int, 0644);
 MODULE_PARM_DESC(mobile_lpm_policy, "Default LPM policy for mobile chipsets");
 
@@ -1604,6 +1604,37 @@ static int ahci_init_msi(struct pci_dev *pdev, unsigned int n_ports,
 	return pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
 }
 
+static void ahci_update_initial_lpm_policy(struct ata_port *ap,
+					   struct ahci_host_priv *hpriv)
+{
+	int policy = CONFIG_SATA_MOBILE_LPM_POLICY;
+
+
+	/* Ignore processing for non mobile platforms */
+	if (!(hpriv->flags & AHCI_HFLAG_IS_MOBILE))
+		return;
+
+	/* user modified policy via module param */
+	if (mobile_lpm_policy != -1) {
+		policy = mobile_lpm_policy;
+		goto update_policy;
+	}
+
+#ifdef CONFIG_ACPI
+	if (policy > ATA_LPM_MED_POWER &&
+	    (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
+		if (hpriv->cap & HOST_CAP_PART)
+			policy = ATA_LPM_MIN_POWER_WITH_PARTIAL;
+		else if (hpriv->cap & HOST_CAP_SSC)
+			policy = ATA_LPM_MIN_POWER;
+	}
+#endif
+
+update_policy:
+	if (policy >= ATA_LPM_UNKNOWN && policy <= ATA_LPM_MIN_POWER)
+		ap->target_lpm_policy = policy;
+}
+
 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	unsigned int board_id = ent->driver_data;
@@ -1807,10 +1838,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		if (ap->flags & ATA_FLAG_EM)
 			ap->em_message_type = hpriv->em_msg_type;
 
-		if ((hpriv->flags & AHCI_HFLAG_IS_MOBILE) &&
-		    mobile_lpm_policy >= ATA_LPM_UNKNOWN &&
-		    mobile_lpm_policy <= ATA_LPM_MIN_POWER)
-			ap->target_lpm_policy = mobile_lpm_policy;
+		ahci_update_initial_lpm_policy(ap, hpriv);
 
 		/* disabled/not-implemented port */
 		if (!(hpriv->port_map & (1 << i)))

drivers/ata/ahci.h

@@ -350,6 +350,7 @@ struct ahci_host_priv {
 	u32			em_msg_type;	/* EM message type */
 	bool			got_runtime_pm; /* Did we do pm_runtime_get? */
 	struct clk		*clks[AHCI_MAX_CLKS]; /* Optional */
+	struct reset_control	*rsts;		/* Optional */
 	struct regulator	**target_pwrs;	/* Optional */
 	/*
 	 * If platform uses PHYs. There is a 1:1 relation between the port number and

drivers/ata/ahci_brcm.c

@@ -425,7 +425,7 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 
 	brcm_sata_phys_enable(priv);
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 	hpriv->plat_data = priv;

drivers/ata/ahci_ceva.c

@@ -213,7 +213,7 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 
 	cevapriv->ahci_pdev = pdev;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_da850.c

@@ -171,7 +171,7 @@ static int ahci_da850_probe(struct platform_device *pdev)
 	u32 mpy;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_dm816.c

@@ -148,7 +148,7 @@ static int ahci_dm816_probe(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_imx.c

@@ -1127,7 +1127,7 @@ static int imx_ahci_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_mtk.c

@@ -142,7 +142,7 @@ static int mtk_ahci_probe(struct platform_device *pdev)
 	if (!plat)
 		return -ENOMEM;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_mvebu.c

@@ -158,7 +158,7 @@ static int ahci_mvebu_probe(struct platform_device *pdev)
 	const struct mbus_dram_target_info *dram;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_platform.c

@@ -43,7 +43,8 @@ static int ahci_probe(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev,
+					    AHCI_PLATFORM_GET_RESETS);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_qoriq.c

@@ -250,7 +250,7 @@ static int ahci_qoriq_probe(struct platform_device *pdev)
 	struct resource *res;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_seattle.c

@@ -164,7 +164,7 @@ static int ahci_seattle_probe(struct platform_device *pdev)
 	int rc;
 	struct ahci_host_priv *hpriv;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_st.c

@@ -156,7 +156,7 @@ static int st_ahci_probe(struct platform_device *pdev)
 	if (!drv_data)
 		return -ENOMEM;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 	hpriv->plat_data = drv_data;

drivers/ata/ahci_sunxi.c

@@ -181,7 +181,7 @@ static int ahci_sunxi_probe(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_tegra.c

@@ -494,7 +494,7 @@ static int tegra_ahci_probe(struct platform_device *pdev)
 	int ret;
 	unsigned int i;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/ahci_xgene.c

@@ -759,7 +759,7 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 					      &xgene_ahci_v2_port_info };
 	int rc;
 
-	hpriv = ahci_platform_get_resources(pdev);
+	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 

drivers/ata/libahci.c

@@ -801,6 +801,8 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 			cmd |= PORT_CMD_ALPE;
 			if (policy == ATA_LPM_MIN_POWER)
 				cmd |= PORT_CMD_ASP;
+			else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
+				cmd &= ~PORT_CMD_ASP;
 
 			/* write out new cmd value */
 			writel(cmd, port_mmio + PORT_CMD);
@@ -811,7 +813,8 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 	if ((hpriv->cap2 & HOST_CAP2_SDS) &&
 	    (hpriv->cap2 & HOST_CAP2_SADM) &&
 	    (link->device->flags & ATA_DFLAG_DEVSLP)) {
-		if (policy == ATA_LPM_MIN_POWER)
+		if (policy == ATA_LPM_MIN_POWER ||
+		    policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
 			ahci_set_aggressive_devslp(ap, true);
 		else
 			ahci_set_aggressive_devslp(ap, false);
@@ -2107,7 +2110,7 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 	struct ahci_host_priv *hpriv = ap->host->private_data;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	struct ata_device *dev = ap->link.device;
-	u32 devslp, dm, dito, mdat, deto;
+	u32 devslp, dm, dito, mdat, deto, dito_conf;
 	int rc;
 	unsigned int err_mask;
 
@@ -2131,8 +2134,15 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 		return;
 	}
 
-	/* device sleep was already enabled */
-	if (devslp & PORT_DEVSLP_ADSE)
+	dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
+	dito = devslp_idle_timeout / (dm + 1);
+	if (dito > 0x3ff)
+		dito = 0x3ff;
+
+	dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF;
+
+	/* device sleep was already enabled and same dito */
+	if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito))
 		return;
 
 	/* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
@@ -2140,11 +2150,6 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 	if (rc)
 		return;
 
-	dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
-	dito = devslp_idle_timeout / (dm + 1);
-	if (dito > 0x3ff)
-		dito = 0x3ff;
-
 	/* Use the nominal value 10 ms if the read MDAT is zero,
 	 * the nominal value of DETO is 20 ms.
 	 */
@@ -2162,6 +2167,8 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 		deto = 20;
 	}
 
+	/* Make dito, mdat, deto bits to 0s */
+	devslp &= ~GENMASK_ULL(24, 2);
 	devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
 		   (mdat << PORT_DEVSLP_MDAT_OFFSET) |
 		   (deto << PORT_DEVSLP_DETO_OFFSET) |
@@ -2439,6 +2446,8 @@ static void ahci_port_stop(struct ata_port *ap)
 	 * re-enabling INTx.
 	 */
 	writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
+
+	ahci_rpm_put_port(ap);
 }
 
 void ahci_print_info(struct ata_host *host, const char *scc_s)

drivers/ata/libahci_platform.c

@@ -25,6 +25,7 @@
 #include <linux/phy/phy.h>
 #include <linux/pm_runtime.h>
 #include <linux/of_platform.h>
+#include <linux/reset.h>
 #include "ahci.h"
 
 static void ahci_host_stop(struct ata_host *host);
@@ -195,7 +196,8 @@ EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);
  * following order:
  * 1) Regulator
  * 2) Clocks (through ahci_platform_enable_clks)
- * 3) Phys
+ * 3) Resets
+ * 4) Phys
  *
  * If resource enabling fails at any point the previous enabled resources
  * are disabled in reverse order.
@@ -215,12 +217,19 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
 	if (rc)
 		goto disable_regulator;
 
-	rc = ahci_platform_enable_phys(hpriv);
+	rc = reset_control_deassert(hpriv->rsts);
 	if (rc)
 		goto disable_clks;
 
+	rc = ahci_platform_enable_phys(hpriv);
+	if (rc)
+		goto disable_resets;
+
 	return 0;
 
+disable_resets:
+	reset_control_assert(hpriv->rsts);
+
 disable_clks:
 	ahci_platform_disable_clks(hpriv);
 
@@ -238,13 +247,16 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
  * This function disables all ahci_platform managed resources in the
  * following order:
  * 1) Phys
- * 2) Clocks (through ahci_platform_disable_clks)
- * 3) Regulator
+ * 2) Resets
+ * 3) Clocks (through ahci_platform_disable_clks)
+ * 4) Regulator
  */
 void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
 {
 	ahci_platform_disable_phys(hpriv);
 
+	reset_control_assert(hpriv->rsts);
+
 	ahci_platform_disable_clks(hpriv);
 
 	ahci_platform_disable_regulators(hpriv);
@@ -332,6 +344,7 @@ static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
 /**
  * ahci_platform_get_resources - Get platform resources
  * @pdev: platform device to get resources for
+ * @flags: bitmap representing the resource to get
  *
  * This function allocates an ahci_host_priv struct, and gets the following
  * resources, storing a reference to them inside the returned struct:
@@ -340,18 +353,20 @@ static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
  * 2) regulator for controlling the targets power (optional)
  * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
  *    or for non devicetree enabled platforms a single clock
- * 4) phys (optional)
+ * 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional)
+ * 5) phys (optional)
  *
  * RETURNS:
  * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
  */
-struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
+struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
+						   unsigned int flags)
 {
 	struct device *dev = &pdev->dev;
 	struct ahci_host_priv *hpriv;
 	struct clk *clk;
 	struct device_node *child;
-	int i, sz, enabled_ports = 0, rc = -ENOMEM, child_nodes;
+	int i, enabled_ports = 0, rc = -ENOMEM, child_nodes;
 	u32 mask_port_map = 0;
 
 	if (!devres_open_group(dev, NULL, GFP_KERNEL))
@@ -393,6 +408,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 		hpriv->clks[i] = clk;
 	}
 
+	if (flags & AHCI_PLATFORM_GET_RESETS) {
+		hpriv->rsts = devm_reset_control_array_get_optional_shared(dev);
+		if (IS_ERR(hpriv->rsts)) {
+			rc = PTR_ERR(hpriv->rsts);
+			goto err_out;
+		}
+	}
+
 	hpriv->nports = child_nodes = of_get_child_count(dev->of_node);
 
 	/*
@@ -403,14 +426,16 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 	if (!child_nodes)
 		hpriv->nports = 1;
 
-	sz = hpriv->nports * sizeof(*hpriv->phys);
-	hpriv->phys = devm_kzalloc(dev, sz, GFP_KERNEL);
+	hpriv->phys = devm_kcalloc(dev, hpriv->nports, sizeof(*hpriv->phys), GFP_KERNEL);
 	if (!hpriv->phys) {
 		rc = -ENOMEM;
 		goto err_out;
 	}
-	sz = hpriv->nports * sizeof(*hpriv->target_pwrs);
-	hpriv->target_pwrs = kzalloc(sz, GFP_KERNEL);
+	/*
+	 * We cannot use devm_ here, since ahci_platform_put_resources() uses
+	 * target_pwrs after devm_ have freed memory
+	 */
+	hpriv->target_pwrs = kcalloc(hpriv->nports, sizeof(*hpriv->target_pwrs), GFP_KERNEL);
 	if (!hpriv->target_pwrs) {
 		rc = -ENOMEM;
 		goto err_out;
@@ -605,7 +630,7 @@ static void ahci_host_stop(struct ata_host *host)
 
 /**
  * ahci_platform_shutdown - Disable interrupts and stop DMA for host ports
- * @dev: platform device pointer for the host
+ * @pdev: platform device pointer for the host
  *
  * This function is called during system shutdown and performs the minimal
  * deconfiguration required to ensure that an ahci_platform host cannot

drivers/ata/libata-core.c

@@ -3970,6 +3970,7 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 		scontrol |= (0x6 << 8);
 		break;
 	case ATA_LPM_MED_POWER_WITH_DIPM:
+	case ATA_LPM_MIN_POWER_WITH_PARTIAL:
 	case ATA_LPM_MIN_POWER:
 		if (ata_link_nr_enabled(link) > 0)
 			/* no restrictions on LPM transitions */
@@ -5066,7 +5067,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
 	if (n_elem < 1)
 		return -1;
 
-	DPRINTK("%d sg elements mapped\n", n_elem);
+	VPRINTK("%d sg elements mapped\n", n_elem);
 	qc->orig_n_elem = qc->n_elem;
 	qc->n_elem = n_elem;
 	qc->flags |= ATA_QCFLAG_DMAMAP;

drivers/ata/libata-scsi.c

@@ -110,6 +110,7 @@ static const char *ata_lpm_policy_names[] = {
 	[ATA_LPM_MAX_POWER]		= "max_performance",
 	[ATA_LPM_MED_POWER]		= "medium_power",
 	[ATA_LPM_MED_POWER_WITH_DIPM]	= "med_power_with_dipm",
+	[ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
 	[ATA_LPM_MIN_POWER]		= "min_power",
 };
 
@@ -4288,10 +4289,10 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
 				     struct scsi_cmnd *cmd)
 {
-#ifdef ATA_DEBUG
+#ifdef ATA_VERBOSE_DEBUG
 	struct scsi_device *scsidev = cmd->device;
 
-	DPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
+	VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
 		ap->print_id,
 		scsidev->channel, scsidev->id, scsidev->lun,
 		cmd->cmnd);

drivers/ata/libata-sff.c

@@ -657,36 +657,6 @@ unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, unsigned char *buf,
 }
 EXPORT_SYMBOL_GPL(ata_sff_data_xfer32);
 
-/**
- *	ata_sff_data_xfer_noirq - Transfer data by PIO
- *	@qc: queued command
- *	@buf: data buffer
- *	@buflen: buffer length
- *	@rw: read/write
- *
- *	Transfer data from/to the device data register by PIO. Do the
- *	transfer with interrupts disabled.
- *
- *	LOCKING:
- *	Inherited from caller.
- *
- *	RETURNS:
- *	Bytes consumed.
- */
-unsigned int ata_sff_data_xfer_noirq(struct ata_queued_cmd *qc, unsigned char *buf,
-				     unsigned int buflen, int rw)
-{
-	unsigned long flags;
-	unsigned int consumed;
-
-	local_irq_save(flags);
-	consumed = ata_sff_data_xfer32(qc, buf, buflen, rw);
-	local_irq_restore(flags);
-
-	return consumed;
-}
-EXPORT_SYMBOL_GPL(ata_sff_data_xfer_noirq);
-
 /**
  *	ata_pio_sector - Transfer a sector of data.
  *	@qc: Command on going

drivers/ata/pata_cmd640.c

@@ -178,7 +178,7 @@ static struct scsi_host_template cmd640_sht = {
 static struct ata_port_operations cmd640_port_ops = {
 	.inherits	= &ata_sff_port_ops,
 	/* In theory xfer_noirq is not needed once we kill the prefetcher */
-	.sff_data_xfer	= ata_sff_data_xfer_noirq,
+	.sff_data_xfer	= ata_sff_data_xfer32,
 	.sff_irq_check	= cmd640_sff_irq_check,
 	.qc_issue	= cmd640_qc_issue,
 	.cable_detect	= ata_cable_40wire,

drivers/ata/pata_icside.c

@@ -324,7 +324,7 @@ static struct ata_port_operations pata_icside_port_ops = {
 	.inherits		= &ata_bmdma_port_ops,
 	/* no need to build any PRD tables for DMA */
 	.qc_prep		= ata_noop_qc_prep,
-	.sff_data_xfer		= ata_sff_data_xfer_noirq,
+	.sff_data_xfer		= ata_sff_data_xfer32,
 	.bmdma_setup		= pata_icside_bmdma_setup,
 	.bmdma_start		= pata_icside_bmdma_start,
 	.bmdma_stop		= pata_icside_bmdma_stop,

drivers/ata/pata_imx.c

@@ -103,7 +103,7 @@ static struct scsi_host_template pata_imx_sht = {
 
 static struct ata_port_operations pata_imx_port_ops = {
 	.inherits		= &ata_sff_port_ops,
-	.sff_data_xfer		= ata_sff_data_xfer_noirq,
+	.sff_data_xfer		= ata_sff_data_xfer32,
 	.cable_detect		= ata_cable_unknown,
 	.set_piomode		= pata_imx_set_piomode,
 };

drivers/ata/pata_legacy.c

@@ -246,12 +246,12 @@ static const struct ata_port_operations legacy_base_port_ops = {
 
 static struct ata_port_operations simple_port_ops = {
 	.inherits	= &legacy_base_port_ops,
-	.sff_data_xfer	= ata_sff_data_xfer_noirq,
+	.sff_data_xfer	= ata_sff_data_xfer32,
 };
 
 static struct ata_port_operations legacy_port_ops = {
 	.inherits	= &legacy_base_port_ops,
-	.sff_data_xfer	= ata_sff_data_xfer_noirq,
+	.sff_data_xfer	= ata_sff_data_xfer32,
 	.set_mode	= legacy_set_mode,
 };
 
@@ -341,7 +341,7 @@ static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc,
 		}
 		local_irq_restore(flags);
 	} else
-		buflen = ata_sff_data_xfer_noirq(qc, buf, buflen, rw);
+		buflen = ata_sff_data_xfer32(qc, buf, buflen, rw);
 
 	return buflen;
 }

drivers/ata/pata_palmld.c

@@ -44,7 +44,7 @@ static struct scsi_host_template palmld_sht = {
 
 static struct ata_port_operations palmld_port_ops = {
 	.inherits		= &ata_sff_port_ops,
-	.sff_data_xfer		= ata_sff_data_xfer_noirq,
+	.sff_data_xfer		= ata_sff_data_xfer32,
 	.cable_detect		= ata_cable_40wire,
 };
 

drivers/ata/pata_pcmcia.c

@@ -151,7 +151,7 @@ static struct scsi_host_template pcmcia_sht = {
 
 static struct ata_port_operations pcmcia_port_ops = {
 	.inherits	= &ata_sff_port_ops,
-	.sff_data_xfer	= ata_sff_data_xfer_noirq,
+	.sff_data_xfer	= ata_sff_data_xfer32,
 	.cable_detect	= ata_cable_40wire,
 	.set_mode	= pcmcia_set_mode,
 };

drivers/ata/pata_platform.c

@@ -49,7 +49,7 @@ static struct scsi_host_template pata_platform_sht = {
 
 static struct ata_port_operations pata_platform_port_ops = {
 	.inherits		= &ata_sff_port_ops,
-	.sff_data_xfer		= ata_sff_data_xfer_noirq,
+	.sff_data_xfer		= ata_sff_data_xfer32,
 	.cable_detect		= ata_cable_unknown,
 	.set_mode		= pata_platform_set_mode,
 };

drivers/ata/pata_via.c

@@ -471,7 +471,7 @@ static struct ata_port_operations via_port_ops = {
 
 static struct ata_port_operations via_port_ops_noirq = {
 	.inherits	= &via_port_ops,
-	.sff_data_xfer	= ata_sff_data_xfer_noirq,
+	.sff_data_xfer	= ata_sff_data_xfer32,
 };
 
 /**

drivers/ata/sata_rcar.c

@@ -17,7 +17,7 @@
 #include <linux/libata.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/err.h>
 
 #define DRV_NAME "sata_rcar"
@@ -109,6 +109,8 @@
 #define SATAINTMASK_ERRMSK		BIT(2)
 #define SATAINTMASK_ERRCRTMSK		BIT(1)
 #define SATAINTMASK_ATAMSK		BIT(0)
+#define SATAINTMASK_ALL_GEN1		0x7ff
+#define SATAINTMASK_ALL_GEN2		0xfff
 
 #define SATA_RCAR_INT_MASK		(SATAINTMASK_SERRMSK | \
 					 SATAINTMASK_ATAMSK)
@@ -152,7 +154,7 @@ enum sata_rcar_type {
 
 struct sata_rcar_priv {
 	void __iomem *base;
-	struct clk *clk;
+	u32 sataint_mask;
 	enum sata_rcar_type type;
 };
 
@@ -226,7 +228,7 @@ static void sata_rcar_freeze(struct ata_port *ap)
 	struct sata_rcar_priv *priv = ap->host->private_data;
 
 	/* mask */
-	iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+	iowrite32(priv->sataint_mask, priv->base + SATAINTMASK_REG);
 
 	ata_sff_freeze(ap);
 }
@@ -242,7 +244,7 @@ static void sata_rcar_thaw(struct ata_port *ap)
 	ata_sff_thaw(ap);
 
 	/* unmask */
-	iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
+	iowrite32(priv->sataint_mask & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
 }
 
 static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
@@ -736,7 +738,7 @@ static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
 	if (!sataintstat)
 		goto done;
 	/* ack */
-	iowrite32(~sataintstat & 0x7ff, base + SATAINTSTAT_REG);
+	iowrite32(~sataintstat & priv->sataint_mask, base + SATAINTSTAT_REG);
 
 	ap = host->ports[0];
 
@@ -809,7 +811,7 @@ static void sata_rcar_init_module(struct sata_rcar_priv *priv)
 
 	/* ack and mask */
 	iowrite32(0, base + SATAINTSTAT_REG);
-	iowrite32(0x7ff, base + SATAINTMASK_REG);
+	iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
 
 	/* enable interrupts */
 	iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
@@ -819,16 +821,20 @@ static void sata_rcar_init_controller(struct ata_host *host)
 {
 	struct sata_rcar_priv *priv = host->private_data;
 
+	priv->sataint_mask = SATAINTMASK_ALL_GEN2;
+
 	/* reset and setup phy */
 	switch (priv->type) {
 	case RCAR_GEN1_SATA:
+		priv->sataint_mask = SATAINTMASK_ALL_GEN1;
 		sata_rcar_gen1_phy_init(priv);
 		break;
 	case RCAR_GEN2_SATA:
-	case RCAR_GEN3_SATA:
 	case RCAR_R8A7790_ES1_SATA:
 		sata_rcar_gen2_phy_init(priv);
 		break;
+	case RCAR_GEN3_SATA:
+		break;
 	default:
 		dev_warn(host->dev, "SATA phy is not initialized\n");
 		break;
@@ -881,6 +887,7 @@ MODULE_DEVICE_TABLE(of, sata_rcar_match);
 
 static int sata_rcar_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct ata_host *host;
 	struct sata_rcar_priv *priv;
 	struct resource *mem;
@@ -891,36 +898,31 @@ static int sata_rcar_probe(struct platform_device *pdev)
 	if (irq <= 0)
 		return -EINVAL;
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(struct sata_rcar_priv),
-			   GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(struct sata_rcar_priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->type = (enum sata_rcar_type)of_device_get_match_data(&pdev->dev);
-	priv->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(priv->clk)) {
-		dev_err(&pdev->dev, "failed to get access to sata clock\n");
-		return PTR_ERR(priv->clk);
-	}
+	priv->type = (enum sata_rcar_type)of_device_get_match_data(dev);
 
-	ret = clk_prepare_enable(priv->clk);
-	if (ret)
-		return ret;
+	pm_runtime_enable(dev);
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0)
+		goto err_pm_disable;
 
-	host = ata_host_alloc(&pdev->dev, 1);
+	host = ata_host_alloc(dev, 1);
 	if (!host) {
-		dev_err(&pdev->dev, "ata_host_alloc failed\n");
+		dev_err(dev, "ata_host_alloc failed\n");
 		ret = -ENOMEM;
-		goto cleanup;
+		goto err_pm_put;
 	}
 
 	host->private_data = priv;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->base = devm_ioremap_resource(&pdev->dev, mem);
+	priv->base = devm_ioremap_resource(dev, mem);
 	if (IS_ERR(priv->base)) {
 		ret = PTR_ERR(priv->base);
-		goto cleanup;
+		goto err_pm_put;
 	}
 
 	/* setup port */
@@ -934,9 +936,10 @@ static int sata_rcar_probe(struct platform_device *pdev)
 	if (!ret)
 		return 0;
 
-cleanup:
-	clk_disable_unprepare(priv->clk);
-
+err_pm_put:
+	pm_runtime_put(dev);
+err_pm_disable:
+	pm_runtime_disable(dev);
 	return ret;
 }
 
@@ -952,9 +955,10 @@ static int sata_rcar_remove(struct platform_device *pdev)
 	iowrite32(0, base + ATAPI_INT_ENABLE_REG);
 	/* ack and mask */
 	iowrite32(0, base + SATAINTSTAT_REG);
-	iowrite32(0x7ff, base + SATAINTMASK_REG);
+	iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
 
-	clk_disable_unprepare(priv->clk);
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 
 	return 0;
 }
@@ -972,9 +976,9 @@ static int sata_rcar_suspend(struct device *dev)
 		/* disable interrupts */
 		iowrite32(0, base + ATAPI_INT_ENABLE_REG);
 		/* mask */
-		iowrite32(0x7ff, base + SATAINTMASK_REG);
+		iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
 
-		clk_disable_unprepare(priv->clk);
+		pm_runtime_put(dev);
 	}
 
 	return ret;
@@ -987,17 +991,16 @@ static int sata_rcar_resume(struct device *dev)
 	void __iomem *base = priv->base;
 	int ret;
 
-	ret = clk_prepare_enable(priv->clk);
-	if (ret)
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0)
 		return ret;
 
 	if (priv->type == RCAR_GEN3_SATA) {
-		sata_rcar_gen2_phy_init(priv);
 		sata_rcar_init_module(priv);
 	} else {
 		/* ack and mask */
 		iowrite32(0, base + SATAINTSTAT_REG);
-		iowrite32(0x7ff, base + SATAINTMASK_REG);
+		iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
 
 		/* enable interrupts */
 		iowrite32(ATAPI_INT_ENABLE_SATAINT,
@@ -1012,11 +1015,10 @@ static int sata_rcar_resume(struct device *dev)
 static int sata_rcar_restore(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
-	struct sata_rcar_priv *priv = host->private_data;
 	int ret;
 
-	ret = clk_prepare_enable(priv->clk);
-	if (ret)
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0)
 		return ret;
 
 	sata_rcar_setup_port(host);

include/linux/ahci_platform.h

@@ -30,7 +30,7 @@ void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv);
 int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
 struct ahci_host_priv *ahci_platform_get_resources(
-	struct platform_device *pdev);
+	struct platform_device *pdev, unsigned int flags);
 int ahci_platform_init_host(struct platform_device *pdev,
 			    struct ahci_host_priv *hpriv,
 			    const struct ata_port_info *pi_template,
@@ -43,4 +43,6 @@ int ahci_platform_resume_host(struct device *dev);
 int ahci_platform_suspend(struct device *dev);
 int ahci_platform_resume(struct device *dev);
 
+#define AHCI_PLATFORM_GET_RESETS	0x01
+
 #endif /* _AHCI_PLATFORM_H */

include/linux/libata.h

@@ -523,7 +523,8 @@ enum ata_lpm_policy {
 	ATA_LPM_MAX_POWER,
 	ATA_LPM_MED_POWER,
 	ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
-	ATA_LPM_MIN_POWER,
+	ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
+	ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
 };
 
 enum ata_lpm_hints {
@@ -1858,8 +1859,6 @@ extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
 			unsigned char *buf, unsigned int buflen, int rw);
 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
 			unsigned char *buf, unsigned int buflen, int rw);
-extern unsigned int ata_sff_data_xfer_noirq(struct ata_queued_cmd *qc,
-			unsigned char *buf, unsigned int buflen, int rw);
 extern void ata_sff_irq_on(struct ata_port *ap);
 extern void ata_sff_irq_clear(struct ata_port *ap);
 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,