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PCI/ASPM: Clean up ASPM disable/enable mask calculation

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With only one set of defines remaining, state can be almost used as-is to
set ->aspm_disable/default. Only CLKPM and L1 PM substates need special
handling.

Remove unnecessary if conditions that can use the state variable bits
directly. Move ASPM mask calculation into pci_calc_aspm_enable_mask() and
pci_calc_aspm_disable_mask() helpers which makes it easier to alter state
variable directly.

Link: https://lore.kernel.org/r/20240322123952.6384-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ilpo Järvinen 2024-03-22 14:39:52 +02:00 committed by Bjorn Helgaas
parent b478e162f2
commit dc69062a1a
1 changed files with 24 additions and 27 deletions
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51
drivers/pci/pcie/aspm.c
View File

@ -1323,6 +1323,28 @@ static struct pcie_link_state *pcie_aspm_get_link(struct pci_dev *pdev)
return bridge->link_state;
}
static u8 pci_calc_aspm_disable_mask(int state)
{
state &= ~PCIE_LINK_STATE_CLKPM;
/* L1 PM substates require L1 */
if (state & PCIE_LINK_STATE_L1)
state |= PCIE_LINK_STATE_L1SS;
return state;
}
static u8 pci_calc_aspm_enable_mask(int state)
{
state &= ~PCIE_LINK_STATE_CLKPM;
/* L1 PM substates require L1 */
if (state & PCIE_LINK_STATE_L1SS)
state |= PCIE_LINK_STATE_L1;
return state;
}
static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool locked)
{
struct pcie_link_state *link = pcie_aspm_get_link(pdev);
@ -1345,19 +1367,7 @@ static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool locked
if (!locked)
down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
if (state & PCIE_LINK_STATE_L0S)
link->aspm_disable |= PCIE_LINK_STATE_L0S;
if (state & PCIE_LINK_STATE_L1)
/* L1 PM substates require L1 */
link->aspm_disable |= PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_L1SS;
if (state & PCIE_LINK_STATE_L1_1)
link->aspm_disable |= PCIE_LINK_STATE_L1_1;
if (state & PCIE_LINK_STATE_L1_2)
link->aspm_disable |= PCIE_LINK_STATE_L1_2;
if (state & PCIE_LINK_STATE_L1_1_PCIPM)
link->aspm_disable |= PCIE_LINK_STATE_L1_1_PCIPM;
if (state & PCIE_LINK_STATE_L1_2_PCIPM)
link->aspm_disable |= PCIE_LINK_STATE_L1_2_PCIPM;
link->aspm_disable |= pci_calc_aspm_disable_mask(state);
pcie_config_aspm_link(link, policy_to_aspm_state(link));
if (state & PCIE_LINK_STATE_CLKPM)
@ -1413,20 +1423,7 @@ static int __pci_enable_link_state(struct pci_dev *pdev, int state, bool locked)
if (!locked)
down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
link->aspm_default = 0;
if (state & PCIE_LINK_STATE_L0S)
link->aspm_default |= PCIE_LINK_STATE_L0S;
if (state & PCIE_LINK_STATE_L1)
link->aspm_default |= PCIE_LINK_STATE_L1;
/* L1 PM substates require L1 */
if (state & PCIE_LINK_STATE_L1_1)
link->aspm_default |= PCIE_LINK_STATE_L1_1 | PCIE_LINK_STATE_L1;
if (state & PCIE_LINK_STATE_L1_2)
link->aspm_default |= PCIE_LINK_STATE_L1_2 | PCIE_LINK_STATE_L1;
if (state & PCIE_LINK_STATE_L1_1_PCIPM)
link->aspm_default |= PCIE_LINK_STATE_L1_1_PCIPM | PCIE_LINK_STATE_L1;
if (state & PCIE_LINK_STATE_L1_2_PCIPM)
link->aspm_default |= PCIE_LINK_STATE_L1_2_PCIPM | PCIE_LINK_STATE_L1;
link->aspm_default = pci_calc_aspm_enable_mask(state);
pcie_config_aspm_link(link, policy_to_aspm_state(link));
link->clkpm_default = (state & PCIE_LINK_STATE_CLKPM) ? 1 : 0;