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ahci: Get rid of host->iomap usage 

Currently the driver uses host->iomap to store all the iomapped BARs
of a PCI device (while AHCI devices actually use just a single memory
window).

We're going to teach AHCI to work with non-PCI buses, so there are two
options to make this work:

1. "fake" host->iomap array for non-PCI devices, and place the needed
   address at iomap[AHCI_PCI_BAR];
2. Get rid of host->iomap usage, instead introduce a private mmio
   field.

This patch implements the second option.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Anton Vorontsov 2010-03-03 20:17:34 +03:00 committed by Jeff Garzik
parent 4fc4c3ce0d
commit d89933497d
1 changed files with 20 additions and 14 deletions
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34
drivers/ata/ahci.c
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@ -295,6 +295,7 @@ struct ahci_em_priv {
};
struct ahci_host_priv {
void __iomem * mmio; /* bus-independant mem map */
unsigned int flags; /* AHCI_HFLAG_* */
u32 cap; /* cap to use */
u32 cap2; /* cap2 to use */
@ -760,7 +761,8 @@ static inline int ahci_nr_ports(u32 cap)
static inline void __iomem *__ahci_port_base(struct ata_host *host,
unsigned int port_no)
{
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->mmio;
return mmio + 0x100 + (port_no * 0x80);
}
@ -820,7 +822,8 @@ static ssize_t ahci_show_host_version(struct device *dev,
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
struct ahci_host_priv *hpriv = ap->host->private_data;
void __iomem *mmio = hpriv->mmio;
return sprintf(buf, "%x\n", readl(mmio + HOST_VERSION));
}
@ -853,7 +856,7 @@ static ssize_t ahci_show_port_cmd(struct device *dev,
static void ahci_save_initial_config(struct pci_dev *pdev,
struct ahci_host_priv *hpriv)
{
void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 cap, cap2, vers, port_map;
int i;
int mv;
@ -982,7 +985,7 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
static void ahci_restore_initial_config(struct ata_host *host)
{
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
writel(hpriv->saved_cap, mmio + HOST_CAP);
if (hpriv->saved_cap2)
@ -1341,7 +1344,7 @@ static int ahci_reset_controller(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 tmp;
/* we must be in AHCI mode, before using anything
@ -1472,7 +1475,8 @@ static void ahci_init_sw_activity(struct ata_link *link)
static int ahci_reset_em(struct ata_host *host)
{
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->mmio;
u32 em_ctl;
em_ctl = readl(mmio + HOST_EM_CTL);
@ -1488,7 +1492,7 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
{
struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 em_ctl;
u32 message[] = {0, 0};
unsigned long flags;
@ -1656,7 +1660,7 @@ static void ahci_init_controller(struct ata_host *host)
{
struct ahci_host_priv *hpriv = host->private_data;
struct pci_dev *pdev = to_pci_dev(host->dev);
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
int i;
void __iomem *port_mmio;
u32 tmp;
@ -2375,7 +2379,7 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
VPRINTK("ENTER\n");
hpriv = host->private_data;
mmio = host->iomap[AHCI_PCI_BAR];
mmio = hpriv->mmio;
/* sigh. 0xffffffff is a valid return from h/w */
irq_stat = readl(mmio + HOST_IRQ_STAT);
@ -2476,7 +2480,8 @@ static void ahci_freeze(struct ata_port *ap)
static void ahci_thaw(struct ata_port *ap)
{
void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
struct ahci_host_priv *hpriv = ap->host->private_data;
void __iomem *mmio = hpriv->mmio;
void __iomem *port_mmio = ahci_port_base(ap);
u32 tmp;
struct ahci_port_priv *pp = ap->private_data;
@ -2641,7 +2646,7 @@ static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 ctl;
if (mesg.event & PM_EVENT_SUSPEND &&
@ -2810,7 +2815,7 @@ static void ahci_print_info(struct ata_host *host)
{
struct ahci_host_priv *hpriv = host->private_data;
struct pci_dev *pdev = to_pci_dev(host->dev);
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 vers, cap, cap2, impl, speed;
const char *speed_s;
u16 cc;
@ -3308,6 +3313,8 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
pci_intx(pdev, 1);
hpriv->mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
/* save initial config */
ahci_save_initial_config(pdev, hpriv);
@ -3328,7 +3335,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
u8 messages;
void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
void __iomem *mmio = hpriv->mmio;
u32 em_loc = readl(mmio + HOST_EM_LOC);
u32 em_ctl = readl(mmio + HOST_EM_CTL);
@ -3372,7 +3379,6 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
if (!host)
return -ENOMEM;
host->iomap = pcim_iomap_table(pdev);
host->private_data = hpriv;
if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)