[libata] add ->qc_issue hook

This hook is used when an ATA controller wishes to use
hardware-specific methods of taskfile delivery, rather
than the standard method of bitbanging the ATA shadow
registers.

drivers/scsi/ata_piix.c

@@ -138,6 +138,8 @@ static struct ata_port_operations piix_pata_ops = {
 	.bmdma_setup		= ata_bmdma_setup_pio,
 	.bmdma_start		= ata_bmdma_start_pio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+
 	.eng_timeout		= ata_eng_timeout,
 
 	.irq_handler		= ata_interrupt,
@@ -161,6 +163,8 @@ static struct ata_port_operations piix_sata_ops = {
 	.bmdma_setup		= ata_bmdma_setup_pio,
 	.bmdma_start		= ata_bmdma_start_pio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+
 	.eng_timeout		= ata_eng_timeout,
 
 	.irq_handler		= ata_interrupt,

drivers/scsi/libata-core.c

@@ -55,7 +55,6 @@ static void ata_host_set_udma(struct ata_port *ap);
 static void ata_dev_set_pio(struct ata_port *ap, unsigned int device);
 static void ata_dev_set_udma(struct ata_port *ap, unsigned int device);
 static void ata_set_mode(struct ata_port *ap);
-static int ata_qc_issue_prot(struct ata_queued_cmd *qc);
 
 static unsigned int ata_unique_id = 1;
 static struct workqueue_struct *ata_wq;
@@ -2369,7 +2368,7 @@ int ata_qc_issue(struct ata_queued_cmd *qc)
 	qc->ap->active_tag = qc->tag;
 	qc->flags |= ATA_QCFLAG_ACTIVE;
 
-	return ata_qc_issue_prot(qc);
+	return ap->ops->qc_issue(qc);
 
 err_out:
 	return -1;
@@ -2391,7 +2390,7 @@ int ata_qc_issue(struct ata_queued_cmd *qc)
  *	Zero on success, negative on error.
  */
 
-static int ata_qc_issue_prot(struct ata_queued_cmd *qc)
+int ata_qc_issue_prot(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 
@@ -3348,6 +3347,7 @@ EXPORT_SYMBOL_GPL(ata_std_bios_param);
 EXPORT_SYMBOL_GPL(ata_std_ports);
 EXPORT_SYMBOL_GPL(ata_device_add);
 EXPORT_SYMBOL_GPL(ata_qc_complete);
+EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
 EXPORT_SYMBOL_GPL(ata_eng_timeout);
 EXPORT_SYMBOL_GPL(ata_tf_load_pio);
 EXPORT_SYMBOL_GPL(ata_tf_load_mmio);

drivers/scsi/sata_nv.c

@@ -139,6 +139,7 @@ static struct ata_port_operations nv_ops = {
 	.bmdma_setup		= ata_bmdma_setup_pio,
 	.bmdma_start		= ata_bmdma_start_pio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= nv_interrupt,
 	.scr_read		= nv_scr_read,

drivers/scsi/sata_promise.c

@@ -115,6 +115,7 @@ static struct ata_port_operations pdc_sata_ops = {
 	.bmdma_setup            = pdc_dma_setup,
 	.bmdma_start            = pdc_dma_start,
 	.qc_prep		= pdc_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= pdc_eng_timeout,
 	.irq_handler		= pdc_interrupt,
 	.scr_read		= pdc_sata_scr_read,

drivers/scsi/sata_sil.c

@@ -132,6 +132,7 @@ static struct ata_port_operations sil_ops = {
 	.bmdma_setup            = ata_bmdma_setup_mmio,
 	.bmdma_start            = ata_bmdma_start_mmio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= ata_interrupt,
 	.scr_read		= sil_scr_read,

drivers/scsi/sata_sis.c

@@ -101,6 +101,7 @@ static struct ata_port_operations sis_ops = {
 	.bmdma_setup            = ata_bmdma_setup_pio,
 	.bmdma_start            = ata_bmdma_start_pio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= ata_interrupt,
 	.scr_read		= sis_scr_read,

drivers/scsi/sata_svw.c

@@ -234,6 +234,7 @@ static struct ata_port_operations k2_sata_ops = {
 	.bmdma_setup            = ata_bmdma_setup_mmio,
 	.bmdma_start            = ata_bmdma_start_mmio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= ata_interrupt,
 	.scr_read		= k2_sata_scr_read,

drivers/scsi/sata_sx4.c

@@ -201,6 +201,7 @@ static struct ata_port_operations pdc_20621_ops = {
 	.bmdma_setup            = pdc20621_dma_setup,
 	.bmdma_start            = pdc20621_dma_start,
 	.qc_prep		= pdc20621_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= pdc_eng_timeout,
 	.irq_handler		= pdc20621_interrupt,
 	.port_start		= pdc_port_start,

drivers/scsi/sata_via.c

@@ -109,6 +109,8 @@ static struct ata_port_operations svia_sata_ops = {
 	.bmdma_setup            = ata_bmdma_setup_pio,
 	.bmdma_start            = ata_bmdma_start_pio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+
 	.eng_timeout		= ata_eng_timeout,
 
 	.irq_handler		= ata_interrupt,

drivers/scsi/sata_vsc.c

@@ -216,6 +216,7 @@ static struct ata_port_operations vsc_sata_ops = {
 	.bmdma_setup            = ata_bmdma_setup_mmio,
 	.bmdma_start            = ata_bmdma_start_mmio,
 	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= vsc_sata_interrupt,
 	.scr_read		= vsc_sata_scr_read,

include/linux/libata.h

@@ -311,7 +311,10 @@ struct ata_port_operations {
 
 	void (*bmdma_setup) (struct ata_queued_cmd *qc);
 	void (*bmdma_start) (struct ata_queued_cmd *qc);
+
 	void (*qc_prep) (struct ata_queued_cmd *qc);
+	int (*qc_issue) (struct ata_queued_cmd *qc);
+
 	void (*eng_timeout) (struct ata_port *ap);
 
 	irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
@@ -372,6 +375,7 @@ extern int ata_port_start (struct ata_port *ap);
 extern void ata_port_stop (struct ata_port *ap);
 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 void ata_dev_id_string(struct ata_device *dev, unsigned char *s,
 			      unsigned int ofs, unsigned int len);
 extern void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc);