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ahci: Introduce ahci_ignore_port() helper

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libahci and AHCI drivers may ignore some ports if the port is invalid
(its ID does not correspond to a valid physical port) or if the user
explicitly requested the port to be ignored with the mask_port_map
ahci module parameter. Such port that shall be ignored can be identified
by checking that the bit corresponding to the port ID is not set in the
mask_port_map field of struct ahci_host_priv. E.g. code such as:
"if (!(hpriv->mask_port_map & (1 << portid)))".

Replace all direct use of the mask_port_map field to detect such port
with the new helper inline function ahci_ignore_port() to make the code
more readable/easier to understand.

The comment describing the mask_port_map field of struct ahci_host_priv
is also updated to be more accurate.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
Damien Le Moal 2025-01-06 14:14:47 +09:00
parent 8c87215dd3
commit c9b5be909e
4 changed files with 18 additions and 7 deletions
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13
drivers/ata/ahci.h
View file

@ -328,7 +328,7 @@ struct ahci_port_priv {
struct ahci_host_priv {
/* Input fields */
unsigned int flags; /* AHCI_HFLAG_* */
u32 mask_port_map; /* mask out particular bits */
u32 mask_port_map; /* Mask of valid ports */
void __iomem * mmio; /* bus-independent mem map */
u32 cap; /* cap to use */
@ -379,6 +379,17 @@ struct ahci_host_priv {
int port);
};
/*
* Return true if a port should be ignored because it is excluded from
* the host port map.
*/
static inline bool ahci_ignore_port(struct ahci_host_priv *hpriv,
unsigned int portid)
{
return portid >= hpriv->nports ||
!(hpriv->mask_port_map & (1 << portid));
}
extern int ahci_ignore_sss;
extern const struct attribute_group *ahci_shost_groups[];

2
drivers/ata/ahci_brcm.c
View file

@ -288,7 +288,7 @@ static unsigned int brcm_ahci_read_id(struct ata_device *dev,
/* Re-initialize and calibrate the PHY */
for (i = 0; i < hpriv->nports; i++) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
rc = phy_init(hpriv->phys[i]);

4
drivers/ata/ahci_ceva.c
View file

@ -206,7 +206,7 @@ static int ceva_ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
goto disable_clks;
for (i = 0; i < hpriv->nports; i++) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
rc = phy_init(hpriv->phys[i]);
@ -218,7 +218,7 @@ static int ceva_ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
ahci_platform_deassert_rsts(hpriv);
for (i = 0; i < hpriv->nports; i++) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
rc = phy_power_on(hpriv->phys[i]);

6
drivers/ata/libahci_platform.c
View file

@ -49,7 +49,7 @@ int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
int rc, i;
for (i = 0; i < hpriv->nports; i++) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
rc = phy_init(hpriv->phys[i]);
@ -73,7 +73,7 @@ int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
disable_phys:
while (--i >= 0) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
phy_power_off(hpriv->phys[i]);
@ -94,7 +94,7 @@ void ahci_platform_disable_phys(struct ahci_host_priv *hpriv)
int i;
for (i = 0; i < hpriv->nports; i++) {
if (!(hpriv->mask_port_map & (1 << i)))
if (ahci_ignore_port(hpriv, i))
continue;
phy_power_off(hpriv->phys[i]);