Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: (26 commits)
  include/linux/libata.h: fix typo
  pata_bf54x: fix return type of bfin_set_devctl
  Drivers: ata: Makefile: replace the use of <module>-objs with <module>-y
  libahci: fix result_tf handling after an ATA PIO data-in command
  pata_sl82c105: implement sff_irq_check() method
  pata_sil680: implement sff_irq_check() method
  pata_pdc202xx_old: implement sff_irq_check() method
  pata_cmd640: implement sff_irq_check() method
  ata_piix: Add device ID for ICH4-L
  pata_sil680: make sil680_sff_exec_command() 'static'
  ata: Intel IDE-R support
  libata: reorder ata_queued_cmd to remove alignment padding on 64 bit builds
  libata: Signal that our SATL supports WRITE SAME(16) with UNMAP
  ata_piix: remove SIDPR locking
  libata: implement cross-port EH exclusion
  libata: add @ap to ata_wait_register() and introduce ata_msleep()
  ata_piix: implement LPM support
  libata: implement LPM support for port multipliers
  libata: reimplement link power management
  libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global
  ...

2 files changed, 82 insertions, 29 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index fe6e681a9d74..0c4929fa34d3 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -89,6 +89,7 @@ enum {
 	ATA_ID_SPG		= 98,
 	ATA_ID_LBA_CAPACITY_2	= 100,
 	ATA_ID_SECTOR_SIZE	= 106,
+	ATA_ID_LOGICAL_SECTOR_SIZE	= 117,	/* and 118 */
 	ATA_ID_LAST_LUN		= 126,
 	ATA_ID_DLF		= 128,
 	ATA_ID_CSFO		= 129,
@@ -640,16 +641,49 @@ static inline int ata_id_flush_ext_enabled(const u16 *id)
 	return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
 }
 
-static inline int ata_id_has_large_logical_sectors(const u16 *id)
+static inline u32 ata_id_logical_sector_size(const u16 *id)
 {
-	if ((id[ATA_ID_SECTOR_SIZE] & 0xc000) != 0x4000)
-		return 0;
-	return id[ATA_ID_SECTOR_SIZE] & (1 << 13);
+	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+	 * IDENTIFY DEVICE data, word 117-118.
+	 * 0xd000 ignores bit 13 (logical:physical > 1)
+	 */
+	if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
+		return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
+			 + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
+	return ATA_SECT_SIZE;
+}
+
+static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
+{
+	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+	 * IDENTIFY DEVICE data, word 106.
+	 * 0xe000 ignores bit 12 (logical sector > 512 bytes)
+	 */
+	if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
+		return (id[ATA_ID_SECTOR_SIZE] & 0xf);
+	return 0;
 }
 
-static inline u16 ata_id_logical_per_physical_sectors(const u16 *id)
+/* Offset of logical sectors relative to physical sectors.
+ *
+ * If device has more than one logical sector per physical sector
+ * (aka 512 byte emulation), vendors might offset the "sector 0" address
+ * so sector 63 is "naturally aligned" - e.g. FAT partition table.
+ * This avoids Read/Mod/Write penalties when using FAT partition table
+ * and updating "well aligned" (FS perspective) physical sectors on every
+ * transaction.
+ */
+static inline u16 ata_id_logical_sector_offset(const u16 *id,
+	 u8 log2_per_phys)
 {
-	return 1 << (id[ATA_ID_SECTOR_SIZE] & 0xf);
+	u16 word_209 = id[209];
+
+	if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
+		u16 first = word_209 & 0x3fff;
+		if (first > 0)
+			return (1 << log2_per_phys) - first;
+	}
+	return 0;
 }
 
 static inline int ata_id_has_lba48(const u16 *id)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 45fb2967b66d..15b77b8dc7e1 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -37,6 +37,7 @@
 #include <scsi/scsi_host.h>
 #include <linux/acpi.h>
 #include <linux/cdrom.h>
+#include <linux/sched.h>
 
 /*
  * Define if arch has non-standard setup.  This is a _PCI_ standard
@@ -172,6 +173,7 @@ enum {
 	ATA_LFLAG_NO_RETRY	= (1 << 5), /* don't retry this link */
 	ATA_LFLAG_DISABLED	= (1 << 6), /* link is disabled */
 	ATA_LFLAG_SW_ACTIVITY	= (1 << 7), /* keep activity stats */
+	ATA_LFLAG_NO_LPM	= (1 << 8), /* disable LPM on this link */
 
 	/* struct ata_port flags */
 	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
@@ -196,7 +198,7 @@ enum {
 	ATA_FLAG_ACPI_SATA	= (1 << 17), /* need native SATA ACPI layout */
 	ATA_FLAG_AN		= (1 << 18), /* controller supports AN */
 	ATA_FLAG_PMP		= (1 << 19), /* controller supports PMP */
-	ATA_FLAG_IPM		= (1 << 20), /* driver can handle IPM */
+	ATA_FLAG_LPM		= (1 << 20), /* driver can handle LPM */
 	ATA_FLAG_EM		= (1 << 21), /* driver supports enclosure
 					      * management */
 	ATA_FLAG_SW_ACTIVITY	= (1 << 22), /* driver supports sw activity
@@ -324,12 +326,11 @@ enum {
 	ATA_EH_HARDRESET	= (1 << 2), /* meaningful only in ->prereset */
 	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_PARK,
 	ATA_EH_ALL_ACTIONS	= ATA_EH_REVALIDATE | ATA_EH_RESET |
-				  ATA_EH_ENABLE_LINK | ATA_EH_LPM,
+				  ATA_EH_ENABLE_LINK,
 
 	/* ata_eh_info->flags */
 	ATA_EHI_HOTPLUGGED	= (1 << 0),  /* could have been hotplugged */
@@ -341,7 +342,7 @@ enum {
 	ATA_EHI_DID_HARDRESET	= (1 << 17), /* already soft-reset this port */
 	ATA_EHI_PRINTINFO	= (1 << 18), /* print configuration info */
 	ATA_EHI_SETMODE		= (1 << 19), /* configure transfer mode */
-	ATA_EHI_POST_SETMODE	= (1 << 20), /* revaildating after setmode */
+	ATA_EHI_POST_SETMODE	= (1 << 20), /* revalidating after setmode */
 
 	ATA_EHI_DID_RESET	= ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
 
@@ -377,7 +378,6 @@ enum {
 	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
 	ATA_HORKAGE_DISABLE	= (1 << 5),	/* Disable it */
 	ATA_HORKAGE_HPA_SIZE	= (1 << 6),	/* native size off by one */
-	ATA_HORKAGE_IPM		= (1 << 7),	/* Link PM problems */
 	ATA_HORKAGE_IVB		= (1 << 8),	/* cbl det validity bit bugs */
 	ATA_HORKAGE_STUCK_ERR	= (1 << 9),	/* stuck ERR on next PACKET */
 	ATA_HORKAGE_BRIDGE_OK	= (1 << 10),	/* no bridge limits */
@@ -464,6 +464,22 @@ enum ata_completion_errors {
 	AC_ERR_NCQ		= (1 << 10), /* marker for offending NCQ qc */
 };
 
+/*
+ * Link power management policy: If you alter this, you also need to
+ * alter libata-scsi.c (for the ascii descriptions)
+ */
+enum ata_lpm_policy {
+	ATA_LPM_UNKNOWN,
+	ATA_LPM_MAX_POWER,
+	ATA_LPM_MED_POWER,
+	ATA_LPM_MIN_POWER,
+};
+
+enum ata_lpm_hints {
+	ATA_LPM_EMPTY		= (1 << 0), /* port empty/probing */
+	ATA_LPM_HIPM		= (1 << 1), /* may use HIPM */
+};
+
 /* forward declarations */
 struct scsi_device;
 struct ata_port_operations;
@@ -478,16 +494,6 @@ typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
 			      unsigned long deadline);
 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
 
-/*
- * host pm policy: If you alter this, you also need to alter libata-scsi.c
- * (for the ascii descriptions)
- */
-enum link_pm {
-	NOT_AVAILABLE,
-	MIN_POWER,
-	MAX_PERFORMANCE,
-	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;
@@ -530,6 +536,10 @@ struct ata_host {
 	void			*private_data;
 	struct ata_port_operations *ops;
 	unsigned long		flags;
+
+	struct mutex		eh_mutex;
+	struct task_struct	*eh_owner;
+
 #ifdef CONFIG_ATA_ACPI
 	acpi_handle		acpi_handle;
 #endif
@@ -560,13 +570,13 @@ struct ata_queued_cmd {
 	unsigned int		extrabytes;
 	unsigned int		curbytes;
 
-	struct scatterlist	*cursg;
-	unsigned int		cursg_ofs;
-
 	struct scatterlist	sgent;
 
 	struct scatterlist	*sg;
 
+	struct scatterlist	*cursg;
+	unsigned int		cursg_ofs;
+
 	unsigned int		err_mask;
 	struct ata_taskfile	result_tf;
 	ata_qc_cb_t		complete_fn;
@@ -604,6 +614,7 @@ struct ata_device {
 	union acpi_object	*gtf_cache;
 	unsigned int		gtf_filter;
 #endif
+	struct device		tdev;
 	/* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
 	u64			n_sectors;	/* size of device, if ATA */
 	u64			n_native_sectors; /* native size, if ATA */
@@ -690,6 +701,7 @@ struct ata_link {
 	struct ata_port		*ap;
 	int			pmp;		/* port multiplier port # */
 
+	struct device		tdev;
 	unsigned int		active_tag;	/* active tag on this link */
 	u32			sactive;	/* active NCQ commands */
 
@@ -699,6 +711,7 @@ struct ata_link {
 	unsigned int		hw_sata_spd_limit;
 	unsigned int		sata_spd_limit;
 	unsigned int		sata_spd;	/* current SATA PHY speed */
+	enum ata_lpm_policy	lpm_policy;
 
 	/* record runtime error info, protected by host_set lock */
 	struct ata_eh_info	eh_info;
@@ -707,6 +720,8 @@ struct ata_link {
 
 	struct ata_device	device[ATA_MAX_DEVICES];
 };
+#define ATA_LINK_CLEAR_BEGIN		offsetof(struct ata_link, active_tag)
+#define ATA_LINK_CLEAR_END		offsetof(struct ata_link, device[0])
 
 struct ata_port {
 	struct Scsi_Host	*scsi_host; /* our co-allocated scsi host */
@@ -752,6 +767,7 @@ struct ata_port {
 	struct ata_port_stats	stats;
 	struct ata_host		*host;
 	struct device 		*dev;
+	struct device		tdev;
 
 	struct mutex		scsi_scan_mutex;
 	struct delayed_work	hotplug_task;
@@ -767,7 +783,7 @@ struct ata_port {
 
 	pm_message_t		pm_mesg;
 	int			*pm_result;
-	enum link_pm		pm_policy;
+	enum ata_lpm_policy	target_lpm_policy;
 
 	struct timer_list	fastdrain_timer;
 	unsigned long		fastdrain_cnt;
@@ -833,8 +849,8 @@ struct ata_port_operations {
 	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);
-	void (*disable_pm)(struct ata_port *ap);
+	int  (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
+			unsigned hints);
 
 	/*
 	 * Start, stop, suspend and resume
@@ -946,6 +962,8 @@ extern int sata_link_debounce(struct ata_link *link,
 			const unsigned long *params, unsigned long deadline);
 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
 			    unsigned long deadline);
+extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+			     bool spm_wakeup);
 extern int sata_link_hardreset(struct ata_link *link,
 			const unsigned long *timing, unsigned long deadline,
 			bool *online, int (*check_ready)(struct ata_link *));
@@ -991,8 +1009,9 @@ extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
 extern void ata_host_resume(struct ata_host *host);
 #endif
 extern int ata_ratelimit(void);
-extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
-			     unsigned long interval, unsigned long timeout);
+extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
+extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
+			u32 val, unsigned long interval, unsigned long timeout);
 extern int atapi_cmd_type(u8 opcode);
 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
 			  u8 pmp, int is_cmd, u8 *fis);