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ahci: move port_map handling to ahci_save_initial_config()

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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>
This commit is contained in:
Tejun Heo 2007-03-18 22:26:53 +09:00 committed by Jeff Garzik
parent d447df140d
commit 17199b187b
1 changed files with 30 additions and 27 deletions
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57
drivers/ata/ahci.c
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@ -498,6 +498,7 @@ static void ahci_save_initial_config(struct ata_probe_ent *probe_ent)
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 @@ static void ahci_save_initial_config(struct ata_probe_ent *probe_ent)
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 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent)
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 &&