libata: convert to iomap

Convert libata core layer and LLDs to use iomap.

* managed iomap is used.  Pointer to pcim_iomap_table() is cached at
  host->iomap and used through out LLDs.  This basically replaces
  host->mmio_base.

* if possible, pcim_iomap_regions() is used

Most iomap operation conversions are taken from Jeff Garzik
<jgarzik@pobox.com>'s iomap branch.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 28 insertions, 40 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index cebbcc8d45fd..308bb8cbe50f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -348,21 +348,21 @@ typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
 
 struct ata_ioports {
-        unsigned long           cmd_addr;
-        unsigned long           data_addr;
-        unsigned long           error_addr;
-        unsigned long           feature_addr;
-        unsigned long           nsect_addr;
-        unsigned long           lbal_addr;
-        unsigned long           lbam_addr;
-        unsigned long           lbah_addr;
-        unsigned long           device_addr;
-        unsigned long           status_addr;
-        unsigned long           command_addr;
-        unsigned long           altstatus_addr;
-        unsigned long           ctl_addr;
-        unsigned long           bmdma_addr;
-        unsigned long           scr_addr;
+        void __iomem            *cmd_addr;
+        void __iomem            *data_addr;
+        void __iomem            *error_addr;
+        void __iomem            *feature_addr;
+        void __iomem            *nsect_addr;
+        void __iomem            *lbal_addr;
+        void __iomem            *lbam_addr;
+        void __iomem            *lbah_addr;
+        void __iomem            *device_addr;
+        void __iomem            *status_addr;
+        void __iomem            *command_addr;
+        void __iomem            *altstatus_addr;
+        void __iomem            *ctl_addr;
+        void __iomem            *bmdma_addr;
+        void __iomem            *scr_addr;
 };
 
 struct ata_probe_ent {
@@ -381,7 +381,7 @@ struct ata_probe_ent {
         unsigned int            irq_flags;
         unsigned long           port_flags;
         unsigned long           _host_flags;
-        void __iomem            *mmio_base;
+        void __iomem * const    *iomap;
         void                    *private_data;
 
         /* port_info for the secondary port.  Together with irq2, it's
@@ -398,7 +398,7 @@ struct ata_host {
         struct device           *dev;
         unsigned long           irq;
         unsigned long           irq2;
-        void __iomem            *mmio_base;
+        void __iomem * const    *iomap;
         unsigned int            n_ports;
         void                    *private_data;
         const struct ata_port_operations *ops;
@@ -768,12 +768,10 @@ 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 irqreturn_t ata_interrupt (int irq, void *dev_instance);
-extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
-                               unsigned int buflen, int write_data);
-extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
-                              unsigned int buflen, int write_data);
-extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
-                              unsigned int buflen, int write_data);
+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,
+                                unsigned int buflen, int write_data);
 extern void ata_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
@@ -1084,10 +1082,9 @@ static inline u8 ata_wait_idle(struct ata_port *ap)
         u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 
         if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
-                unsigned long l = ap->ioaddr.status_addr;
                 if (ata_msg_warn(ap))
-                        printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
-                                status, l);
+                        printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
+                                status, ap->ioaddr.status_addr);
         }
 
         return status;
@@ -1172,20 +1169,11 @@ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
                         printk(KERN_ERR "abnormal status 0x%X\n", status);
 
         /* get controller status; clear intr, err bits */
-        if (ap->flags & ATA_FLAG_MMIO) {
-                void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-                host_stat = readb(mmio + ATA_DMA_STATUS);
-                writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
-                       mmio + ATA_DMA_STATUS);
-
-                post_stat = readb(mmio + ATA_DMA_STATUS);
-        } else {
-                host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-                outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
-                     ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-
-                post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-        }
+        host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+        iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
+                 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+
+        post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_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",