2 files changed, 100 insertions, 18 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 94f77cce27fa..a8155ca4947f 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -302,4 +302,16 @@ static inline int ata_ok(u8 status)
                         == ATA_DRDY);
 }
 
+static inline int lba_28_ok(u64 block, u32 n_block)
+{
+        /* check the ending block number */
+        return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
+}
+
+static inline int lba_48_ok(u64 block, u32 n_block)
+{
+        /* check the ending block number */
+        return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
+}
+
 #endif /* __LINUX_ATA_H__ */
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 9e5db2949c58..c1e198655bb1 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -35,7 +35,8 @@
 #include <linux/workqueue.h>
 
 /*
- * compile-time options
+ * compile-time options: to be removed as soon as all the drivers are
+ * converted to the new debugging mechanism
  */
 #undef ATA_DEBUG                /* debugging output */
 #undef ATA_VERBOSE_DEBUG        /* yet more debugging output */
@@ -71,6 +72,38 @@
         }
 #endif
 
+/* NEW: debug levels */
+#define HAVE_LIBATA_MSG 1
+
+enum {
+        ATA_MSG_DRV     = 0x0001,
+        ATA_MSG_INFO    = 0x0002,
+        ATA_MSG_PROBE   = 0x0004,
+        ATA_MSG_WARN    = 0x0008,
+        ATA_MSG_MALLOC  = 0x0010,
+        ATA_MSG_CTL     = 0x0020,
+        ATA_MSG_INTR    = 0x0040,
+        ATA_MSG_ERR     = 0x0080,
+};
+
+#define ata_msg_drv(p)    ((p)->msg_enable & ATA_MSG_DRV)
+#define ata_msg_info(p)   ((p)->msg_enable & ATA_MSG_INFO)
+#define ata_msg_probe(p)  ((p)->msg_enable & ATA_MSG_PROBE)
+#define ata_msg_warn(p)   ((p)->msg_enable & ATA_MSG_WARN)
+#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
+#define ata_msg_ctl(p)    ((p)->msg_enable & ATA_MSG_CTL)
+#define ata_msg_intr(p)   ((p)->msg_enable & ATA_MSG_INTR)
+#define ata_msg_err(p)    ((p)->msg_enable & ATA_MSG_ERR)
+
+static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
+{
+        if (dval < 0 || dval >= (sizeof(u32) * 8))
+                return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
+        if (!dval)
+                return 0;
+        return (1 << dval) - 1;
+}
+
 /* defines only for the constants which don't work well as enums */
 #define ATA_TAG_POISON          0xfafbfcfdU
 
@@ -115,9 +148,9 @@ enum {
         ATA_FLAG_PORT_DISABLED  = (1 << 2), /* port is disabled, ignore it */
         ATA_FLAG_SATA           = (1 << 3),
         ATA_FLAG_NO_LEGACY      = (1 << 4), /* no legacy mode check */
-        ATA_FLAG_SRST           = (1 << 5), /* use ATA SRST, not E.D.D. */
+        ATA_FLAG_SRST           = (1 << 5), /* (obsolete) use ATA SRST, not E.D.D. */
         ATA_FLAG_MMIO           = (1 << 6), /* use MMIO, not PIO */
-        ATA_FLAG_SATA_RESET     = (1 << 7), /* use COMRESET */
+        ATA_FLAG_SATA_RESET     = (1 << 7), /* (obsolete) use COMRESET */
         ATA_FLAG_PIO_DMA        = (1 << 8), /* PIO cmds via DMA */
         ATA_FLAG_NOINTR         = (1 << 9), /* FIXME: Remove this once
                                              * proper HSM is in place. */
@@ -129,10 +162,14 @@ enum {
         ATA_FLAG_PIO_LBA48      = (1 << 13), /* Host DMA engine is LBA28 only */
         ATA_FLAG_IRQ_MASK       = (1 << 14), /* Mask IRQ in PIO xfers */
 
+        ATA_FLAG_FLUSH_PIO_TASK = (1 << 15), /* Flush PIO task */
+        ATA_FLAG_IN_EH          = (1 << 16), /* EH in progress */
+
         ATA_QCFLAG_ACTIVE       = (1 << 1), /* cmd not yet ack'd to scsi lyer */
         ATA_QCFLAG_SG           = (1 << 3), /* have s/g table? */
         ATA_QCFLAG_SINGLE       = (1 << 4), /* no s/g, just a single buffer */
         ATA_QCFLAG_DMAMAP       = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
+        ATA_QCFLAG_EH_SCHEDULED = (1 << 5), /* EH scheduled */
 
         /* various lengths of time */
         ATA_TMOUT_EDD           = 5 * HZ,       /* heuristic */
@@ -189,10 +226,15 @@ enum hsm_task_states {
 };
 
 enum ata_completion_errors {
-        AC_ERR_OTHER            = (1 << 0),
-        AC_ERR_DEV              = (1 << 1),
-        AC_ERR_ATA_BUS          = (1 << 2),
-        AC_ERR_HOST_BUS         = (1 << 3),
+        AC_ERR_DEV              = (1 << 0), /* device reported error */
+        AC_ERR_HSM              = (1 << 1), /* host state machine violation */
+        AC_ERR_TIMEOUT          = (1 << 2), /* timeout */
+        AC_ERR_MEDIA            = (1 << 3), /* media error */
+        AC_ERR_ATA_BUS          = (1 << 4), /* ATA bus error */
+        AC_ERR_HOST_BUS         = (1 << 5), /* host bus error */
+        AC_ERR_SYSTEM           = (1 << 6), /* system error */
+        AC_ERR_INVALID          = (1 << 7), /* invalid argument */
+        AC_ERR_OTHER            = (1 << 8), /* unknown */
 };
 
 /* forward declarations */
@@ -202,7 +244,10 @@ struct ata_port;
 struct ata_queued_cmd;
 
 /* typedefs */
-typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
+typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
+typedef void (*ata_probeinit_fn_t)(struct ata_port *);
+typedef int (*ata_reset_fn_t)(struct ata_port *, int, unsigned int *);
+typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
 
 struct ata_ioports {
         unsigned long           cmd_addr;
@@ -359,6 +404,9 @@ struct ata_port {
         unsigned int            hsm_task_state;
         unsigned long           pio_task_timeout;
 
+        u32                     msg_enable;
+        struct list_head        eh_done_q;
+
         void                    *private_data;
 };
 
@@ -378,7 +426,9 @@ struct ata_port_operations {
         u8   (*check_altstatus)(struct ata_port *ap);
         void (*dev_select)(struct ata_port *ap, unsigned int device);
 
-        void (*phy_reset) (struct ata_port *ap);
+        void (*phy_reset) (struct ata_port *ap); /* obsolete */
+        int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
+
         void (*post_set_mode) (struct ata_port *ap);
 
         int (*check_atapi_dma) (struct ata_queued_cmd *qc);
@@ -387,7 +437,7 @@ struct ata_port_operations {
         void (*bmdma_start) (struct ata_queued_cmd *qc);
 
         void (*qc_prep) (struct ata_queued_cmd *qc);
-        int (*qc_issue) (struct ata_queued_cmd *qc);
+        unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
 
         void (*eng_timeout) (struct ata_port *ap);
 
@@ -435,6 +485,16 @@ extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
 extern void sata_phy_reset(struct ata_port *ap);
 extern void ata_bus_reset(struct ata_port *ap);
+extern int ata_drive_probe_reset(struct ata_port *ap,
+                        ata_probeinit_fn_t probeinit,
+                        ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+                        ata_postreset_fn_t postreset, unsigned int *classes);
+extern void ata_std_probeinit(struct ata_port *ap);
+extern int ata_std_softreset(struct ata_port *ap, int verbose,
+                             unsigned int *classes);
+extern int sata_std_hardreset(struct ata_port *ap, int verbose,
+                              unsigned int *class);
+extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
 #ifdef CONFIG_PCI
@@ -449,7 +509,10 @@ extern void ata_host_set_remove(struct ata_host_set *host_set);
 extern int ata_scsi_detect(struct scsi_host_template *sht);
 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
+extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 extern int ata_scsi_error(struct Scsi_Host *host);
+extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
+extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
 extern int ata_scsi_release(struct Scsi_Host *host);
 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
 extern int ata_scsi_device_resume(struct scsi_device *);
@@ -457,6 +520,9 @@ extern int ata_scsi_device_suspend(struct scsi_device *);
 extern int ata_device_resume(struct ata_port *, struct ata_device *);
 extern int ata_device_suspend(struct ata_port *, struct ata_device *);
 extern int ata_ratelimit(void);
+extern unsigned int ata_busy_sleep(struct ata_port *ap,
+                                   unsigned long timeout_pat,
+                                   unsigned long timeout);
 
 /*
  * Default driver ops implementations
@@ -470,12 +536,13 @@ extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
 extern u8 ata_check_status(struct ata_port *ap);
 extern u8 ata_altstatus(struct ata_port *ap);
 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
+extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
 extern int ata_port_start (struct ata_port *ap);
 extern void ata_port_stop (struct ata_port *ap);
 extern void ata_host_stop (struct ata_host_set *host_set);
 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
 extern void ata_qc_prep(struct ata_queued_cmd *qc);
-extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
+extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
                 unsigned int buflen);
 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
@@ -645,9 +712,9 @@ static inline u8 ata_wait_idle(struct ata_port *ap)
 
         if (status & (ATA_BUSY | ATA_DRQ)) {
                 unsigned long l = ap->ioaddr.status_addr;
-                printk(KERN_WARNING
-                       "ATA: abnormal status 0x%X on port 0x%lX\n",
-                       status, l);
+                if (ata_msg_warn(ap))
+                        printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
+                                status, l);
         }
 
         return status;
@@ -739,7 +806,8 @@ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
 
         status = ata_busy_wait(ap, bits, 1000);
         if (status & bits)
-                DPRINTK("abnormal status 0x%X\n", status);
+                if (ata_msg_err(ap))
+                        printk(KERN_ERR "abnormal status 0x%X\n", status);
 
         /* get controller status; clear intr, err bits */
         if (ap->flags & ATA_FLAG_MMIO) {
@@ -757,8 +825,10 @@ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
                 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
         }
 
-        VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
-                host_stat, post_stat, status);
+        if (ata_msg_intr(ap))
+                printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
+                        __FUNCTION__,
+                        host_stat, post_stat, status);
 
         return status;
 }
@@ -795,7 +865,7 @@ static inline int ata_try_flush_cache(const struct ata_device *dev)
 static inline unsigned int ac_err_mask(u8 status)
 {
         if (status & ATA_BUSY)
-                return AC_ERR_ATA_BUS;
+                return AC_ERR_HSM;
         if (status & (ATA_ERR | ATA_DF))
                 return AC_ERR_DEV;
         return 0;