libata: track SLEEP state and issue SRST to wake it up

[linux-2.6] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 229a9ff9f9241995e5e22ef4ead50394c76f3bb3..2f0fc636b4b6c66e6c2c23cad8132ea60e595b22 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -29,7 +29,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/dma-mapping.h>
-#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
 #include <linux/io.h>
 #include <linux/ata.h>
 #include <linux/workqueue.h>
@@ -138,6 +138,7 @@ enum {
        ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */
        ATA_DFLAG_NCQ_OFF       = (1 << 13), /* device limited to non-NCQ mode */
        ATA_DFLAG_SPUNDOWN      = (1 << 14), /* XXX: for spindown_compat */
+       ATA_DFLAG_SLEEPING      = (1 << 15), /* device is sleeping */
        ATA_DFLAG_INIT_MASK     = (1 << 16) - 1,
 
        ATA_DFLAG_DETACH        = (1 << 16),
@@ -326,7 +327,7 @@ enum {
        ATA_HORKAGE_SKIP_PM     = (1 << 5),     /* Skip PM operations */
        ATA_HORKAGE_HPA_SIZE    = (1 << 6),     /* native size off by one */
 
-        /* DMA mask for user DMA control: User visible values; DO NOT 
+        /* DMA mask for user DMA control: User visible values; DO NOT
            renumber */
        ATA_DMA_MASK_ATA        = (1 << 0),     /* DMA on ATA Disk */
        ATA_DMA_MASK_ATAPI      = (1 << 1),     /* DMA on ATAPI */
@@ -416,6 +417,7 @@ struct ata_queued_cmd {
        unsigned long           flags;          /* ATA_QCFLAG_xxx */
        unsigned int            tag;
        unsigned int            n_elem;
+       unsigned int            n_iter;
        unsigned int            orig_n_elem;
 
        int                     dma_dir;
@@ -426,7 +428,7 @@ struct ata_queued_cmd {
        unsigned int            nbytes;
        unsigned int            curbytes;
 
-       unsigned int            cursg;
+       struct scatterlist      *cursg;
        unsigned int            cursg_ofs;
 
        struct scatterlist      sgent;
@@ -716,7 +718,7 @@ struct ata_timing {
        unsigned short udma;            /* t2CYCTYP/2 */
 };
 
-#define FIT(v,vmin,vmax)       max_t(short,min_t(short,v,vmax),vmin)
+#define FIT(v, vmin, vmax)     max_t(short, min_t(short, v, vmax), vmin)
 
 extern const unsigned long sata_deb_timing_normal[];
 extern const unsigned long sata_deb_timing_hotplug[];
@@ -815,14 +817,14 @@ extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
                          u8 pmp, int is_cmd, u8 *fis);
 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
-extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
-extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
+extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
+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_port_start (struct ata_port *ap);
-extern int ata_sff_port_start (struct ata_port *ap);
-extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
+extern int ata_port_start(struct ata_port *ap);
+extern int ata_sff_port_start(struct ata_port *ap);
+extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
                          unsigned int buflen, int write_data);
 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
@@ -843,8 +845,8 @@ extern void ata_id_string(const u16 *id, unsigned char *s,
 extern void ata_id_c_string(const u16 *id, unsigned char *s,
                            unsigned int ofs, unsigned int len);
 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
-extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
-extern void ata_bmdma_start (struct ata_queued_cmd *qc);
+extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
+extern void ata_bmdma_start(struct ata_queued_cmd *qc);
 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
 extern u8   ata_bmdma_status(struct ata_port *ap);
 extern void ata_bmdma_irq_clear(struct ata_port *ap);
@@ -919,9 +921,9 @@ static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
 #ifdef CONFIG_PCI
 struct pci_dev;
 
-extern int ata_pci_init_one (struct pci_dev *pdev,
+extern int ata_pci_init_one(struct pci_dev *pdev,
                             const struct ata_port_info * const * ppi);
-extern void ata_pci_remove_one (struct pci_dev *pdev);
+extern void ata_pci_remove_one(struct pci_dev *pdev);
 #ifdef CONFIG_PM
 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
@@ -1036,21 +1038,10 @@ extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
 /*
  * qc helpers
  */
-static inline int
-ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
-{
-       if (sg == &qc->pad_sgent)
-               return 1;
-       if (qc->pad_len)
-               return 0;
-       if (((sg - qc->__sg) + 1) == qc->n_elem)
-               return 1;
-       return 0;
-}
-
 static inline struct scatterlist *
 ata_qc_first_sg(struct ata_queued_cmd *qc)
 {
+       qc->n_iter = 0;
        if (qc->n_elem)
                return qc->__sg;
        if (qc->pad_len)
@@ -1063,8 +1054,8 @@ ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
 {
        if (sg == &qc->pad_sgent)
                return NULL;
-       if (++sg - qc->__sg < qc->n_elem)
-               return sg;
+       if (++qc->n_iter < qc->n_elem)
+               return sg_next(sg);
        if (qc->pad_len)
                return &qc->pad_sgent;
        return NULL;
@@ -1309,9 +1300,11 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
        qc->dma_dir = DMA_NONE;
        qc->__sg = NULL;
        qc->flags = 0;
-       qc->cursg = qc->cursg_ofs = 0;
+       qc->cursg = NULL;
+       qc->cursg_ofs = 0;
        qc->nbytes = qc->curbytes = 0;
        qc->n_elem = 0;
+       qc->n_iter = 0;
        qc->err_mask = 0;
        qc->pad_len = 0;
        qc->sect_size = ATA_SECT_SIZE;