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PCI ASPM: cleanup clkpm state in struct pcie_link_state 

The "clk_pm_capable", "clk_pm_enable" and "bios_clk_state" fields in
the struct pcie_link_state only take 1-bit value. So those fields
don't need to be defined as unsigned int. This patch makes those
fields 1-bit, and cleans up some related code.

Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2009-05-13 12:15:38 +09:00 committed by Jesse Barnes
parent b6c2e54d3e
commit 4d246e4589
1 changed files with 18 additions and 19 deletions
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37
drivers/pci/pcie/aspm.c
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@ -45,14 +45,13 @@ struct pcie_link_state {
u32 aspm_enabled:2; /* Enabled ASPM state */
u32 aspm_default:2; /* Default ASPM state by BIOS */
/* Clock PM state */
u32 clkpm_capable:1; /* Clock PM capable? */
u32 clkpm_enabled:1; /* Current Clock PM state */
u32 clkpm_default:1; /* Default Clock PM state by BIOS */
/* Latencies */
struct aspm_latency latency; /* Exit latency */
/* Clock PM state*/
unsigned int clk_pm_capable;
unsigned int clk_pm_enabled;
unsigned int bios_clk_state;
/*
* Endpoint acceptable latencies. A pcie downstream port only
* has one slot under it, so at most there are 8 functions.
@ -105,7 +104,7 @@ static int policy_to_clkpm_state(struct pci_dev *pdev)
/* Disable Clock PM */
return 1;
case POLICY_DEFAULT:
return link_state->bios_clk_state;
return link_state->clkpm_default;
}
return 0;
}
@ -128,7 +127,7 @@ static void pcie_set_clock_pm(struct pci_dev *pdev, int enable)
reg16 &= ~PCI_EXP_LNKCTL_CLKREQ_EN;
pci_write_config_word(child_dev, pos + PCI_EXP_LNKCTL, reg16);
}
link_state->clk_pm_enabled = !!enable;
link_state->clkpm_enabled = !!enable;
}
static void pcie_check_clock_pm(struct pci_dev *pdev, int blacklist)
@ -155,13 +154,13 @@ static void pcie_check_clock_pm(struct pci_dev *pdev, int blacklist)
if (!(reg16 & PCI_EXP_LNKCTL_CLKREQ_EN))
enabled = 0;
}
link_state->clk_pm_enabled = enabled;
link_state->bios_clk_state = enabled;
link_state->clkpm_enabled = enabled;
link_state->clkpm_default = enabled;
if (!blacklist) {
link_state->clk_pm_capable = capable;
link_state->clkpm_capable = capable;
pcie_set_clock_pm(pdev, policy_to_clkpm_state(pdev));
} else {
link_state->clk_pm_capable = 0;
link_state->clkpm_capable = 0;
pcie_set_clock_pm(pdev, 0);
}
}
@ -774,10 +773,10 @@ void pci_disable_link_state(struct pci_dev *pdev, int state)
link_state = parent->link_state;
link_state->aspm_support &= ~state;
if (state & PCIE_LINK_STATE_CLKPM)
link_state->clk_pm_capable = 0;
link_state->clkpm_capable = 0;
__pcie_aspm_configure_link_state(parent, link_state->aspm_enabled);
if (!link_state->clk_pm_capable && link_state->clk_pm_enabled)
if (!link_state->clkpm_capable && link_state->clkpm_enabled)
pcie_set_clock_pm(parent, 0);
mutex_unlock(&aspm_lock);
up_read(&pci_bus_sem);
@ -805,8 +804,8 @@ static int pcie_aspm_set_policy(const char *val, struct kernel_param *kp)
pdev = link_state->pdev;
__pcie_aspm_configure_link_state(pdev,
policy_to_aspm_state(pdev));
if (link_state->clk_pm_capable &&
link_state->clk_pm_enabled != policy_to_clkpm_state(pdev))
if (link_state->clkpm_capable &&
link_state->clkpm_enabled != policy_to_clkpm_state(pdev))
pcie_set_clock_pm(pdev, policy_to_clkpm_state(pdev));
}
@ -867,7 +866,7 @@ static ssize_t clk_ctl_show(struct device *dev,
struct pci_dev *pci_device = to_pci_dev(dev);
struct pcie_link_state *link_state = pci_device->link_state;
return sprintf(buf, "%d\n", link_state->clk_pm_enabled);
return sprintf(buf, "%d\n", link_state->clkpm_enabled);
}
static ssize_t clk_ctl_store(struct device *dev,
@ -906,7 +905,7 @@ void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
if (link_state->aspm_support)
sysfs_add_file_to_group(&pdev->dev.kobj,
&dev_attr_link_state.attr, power_group);
if (link_state->clk_pm_capable)
if (link_state->clkpm_capable)
sysfs_add_file_to_group(&pdev->dev.kobj,
&dev_attr_clk_ctl.attr, power_group);
}
@ -922,7 +921,7 @@ void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
if (link_state->aspm_support)
sysfs_remove_file_from_group(&pdev->dev.kobj,
&dev_attr_link_state.attr, power_group);
if (link_state->clk_pm_capable)
if (link_state->clkpm_capable)
sysfs_remove_file_from_group(&pdev->dev.kobj,
&dev_attr_clk_ctl.attr, power_group);
}