ahci: move port_map handling to ahci_save_initial_config()
Move cross checking between port_map and cap.n_ports into
ahci_save_initial_config(). After save_initial_config is done,
hpriv->port_map is always setup properly.
Tested on JMB363, ICH7 and ICH8 (with dummy ports).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c31b663..fb9f692 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -498,6 +498,7 @@
struct ahci_host_priv *hpriv = probe_ent->private_data;
void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
u32 cap, port_map;
+ int i;
/* Values prefixed with saved_ are written back to host after
* reset. Values without are used for driver operation.
@@ -515,6 +516,31 @@
hpriv->saved_port_map = port_map;
}
+ /* cross check port_map and cap.n_ports */
+ if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
+ u32 tmp_port_map = port_map;
+ int n_ports = ahci_nr_ports(cap);
+
+ for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
+ if (tmp_port_map & (1 << i)) {
+ n_ports--;
+ tmp_port_map &= ~(1 << i);
+ }
+ }
+
+ /* Whine if inconsistent. No need to update cap.
+ * port_map is used to determine number of ports.
+ */
+ if (n_ports || tmp_port_map)
+ dev_printk(KERN_WARNING, probe_ent->dev,
+ "nr_ports (%u) and implemented port map "
+ "(0x%x) don't match\n",
+ ahci_nr_ports(cap), port_map);
+ } else {
+ /* fabricate port_map from cap.nr_ports */
+ port_map = (1 << ahci_nr_ports(cap)) - 1;
+ }
+
/* record values to use during operation */
hpriv->cap = cap;
hpriv->port_map = port_map;
@@ -1589,41 +1615,18 @@
struct ahci_host_priv *hpriv = probe_ent->private_data;
struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
- unsigned int i, cap_n_ports, using_dac;
+ unsigned int i, using_dac;
int rc;
rc = ahci_reset_controller(mmio, pdev, hpriv);
if (rc)
return rc;
- cap_n_ports = ahci_nr_ports(hpriv->cap);
+ probe_ent->n_ports = fls(hpriv->port_map);
+ probe_ent->dummy_port_mask = ~hpriv->port_map;
VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
- hpriv->cap, hpriv->port_map, cap_n_ports);
-
- if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
- unsigned int n_ports = cap_n_ports;
- u32 port_map = hpriv->port_map;
- int max_port = 0;
-
- for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
- if (port_map & (1 << i)) {
- n_ports--;
- port_map &= ~(1 << i);
- max_port = i;
- } else
- probe_ent->dummy_port_mask |= 1 << i;
- }
-
- if (n_ports || port_map)
- dev_printk(KERN_WARNING, &pdev->dev,
- "nr_ports (%u) and implemented port map "
- "(0x%x) don't match\n",
- cap_n_ports, hpriv->port_map);
-
- probe_ent->n_ports = max_port + 1;
- } else
- probe_ent->n_ports = cap_n_ports;
+ hpriv->cap, hpriv->port_map, probe_ent->n_ports);
using_dac = hpriv->cap & HOST_CAP_64;
if (using_dac &&