[v2,04/13] PCI/ASPM: Move L0S/L1/sub states mask calculation into a helper
Commit Message
ASPM service driver does the same L0S / L1S / sub states allowed
calculation in __pci_disable_link_state() and
pci_set_default_link_state().
Create a helper to calculate the mask for the allowed states.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
drivers/pci/pcie/aspm.c | 33 +++++++++++++++++++++------------
1 file changed, 21 insertions(+), 12 deletions(-)
Comments
On Mon, Sep 18, 2023 at 04:10:54PM +0300, Ilpo Järvinen wrote:
> ASPM service driver does the same L0S / L1S / sub states allowed
> calculation in __pci_disable_link_state() and
> pci_set_default_link_state().
Is there a typo or something here? This patch only adds a call to
__pci_disable_link_state(), not to pci_set_default_link_state().
> Create a helper to calculate the mask for the allowed states.
>
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
> drivers/pci/pcie/aspm.c | 33 +++++++++++++++++++++------------
> 1 file changed, 21 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
> index ec6d7a092ac1..91dc95aca90f 100644
> --- a/drivers/pci/pcie/aspm.c
> +++ b/drivers/pci/pcie/aspm.c
> @@ -1034,6 +1034,26 @@ static struct pcie_link_state *pcie_aspm_get_link(struct pci_dev *pdev)
> return bridge->link_state;
> }
>
> +static u8 pci_link_state_mask(int state)
> +{
> + u8 result = 0;
> +
> + if (state & PCIE_LINK_STATE_L0S)
> + result |= ASPM_STATE_L0S;
> + if (state & PCIE_LINK_STATE_L1)
> + result |= ASPM_STATE_L1;
> + if (state & PCIE_LINK_STATE_L1_1)
> + result |= ASPM_STATE_L1_1;
> + if (state & PCIE_LINK_STATE_L1_2)
> + result |= ASPM_STATE_L1_2;
> + if (state & PCIE_LINK_STATE_L1_1_PCIPM)
> + result |= ASPM_STATE_L1_1_PCIPM;
> + if (state & PCIE_LINK_STATE_L1_2_PCIPM)
> + result |= ASPM_STATE_L1_2_PCIPM;
> +
> + return result;
> +}
> +
> static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
> {
> struct pcie_link_state *link = pcie_aspm_get_link(pdev);
> @@ -1063,18 +1083,7 @@ static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
> if (sem)
> down_read(&pci_bus_sem);
> mutex_lock(&aspm_lock);
> - if (state & PCIE_LINK_STATE_L0S)
> - link->aspm_disable |= ASPM_STATE_L0S;
> - if (state & PCIE_LINK_STATE_L1)
> - link->aspm_disable |= ASPM_STATE_L1;
> - if (state & PCIE_LINK_STATE_L1_1)
> - link->aspm_disable |= ASPM_STATE_L1_1;
> - if (state & PCIE_LINK_STATE_L1_2)
> - link->aspm_disable |= ASPM_STATE_L1_2;
> - if (state & PCIE_LINK_STATE_L1_1_PCIPM)
> - link->aspm_disable |= ASPM_STATE_L1_1_PCIPM;
> - if (state & PCIE_LINK_STATE_L1_2_PCIPM)
> - link->aspm_disable |= ASPM_STATE_L1_2_PCIPM;
> + link->aspm_disable |= pci_link_state_mask(state);
> pcie_config_aspm_link(link, policy_to_aspm_state(link));
>
> if (state & PCIE_LINK_STATE_CLKPM)
> --
> 2.30.2
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On Wed, 11 Oct 2023, Bjorn Helgaas wrote:
> On Mon, Sep 18, 2023 at 04:10:54PM +0300, Ilpo Järvinen wrote:
> > ASPM service driver does the same L0S / L1S / sub states allowed
> > calculation in __pci_disable_link_state() and
> > pci_set_default_link_state().
>
> Is there a typo or something here? This patch only adds a call to
> __pci_disable_link_state(), not to pci_set_default_link_state().
This was because one of the changes that got included in the meantime made
the state handling in those two functions to differ so I removed the call
from the code but forgot to update the changelog to match the code. I'll
fix the changelog.
@@ -1034,6 +1034,26 @@ static struct pcie_link_state *pcie_aspm_get_link(struct pci_dev *pdev)
return bridge->link_state;
}
+static u8 pci_link_state_mask(int state)
+{
+ u8 result = 0;
+
+ if (state & PCIE_LINK_STATE_L0S)
+ result |= ASPM_STATE_L0S;
+ if (state & PCIE_LINK_STATE_L1)
+ result |= ASPM_STATE_L1;
+ if (state & PCIE_LINK_STATE_L1_1)
+ result |= ASPM_STATE_L1_1;
+ if (state & PCIE_LINK_STATE_L1_2)
+ result |= ASPM_STATE_L1_2;
+ if (state & PCIE_LINK_STATE_L1_1_PCIPM)
+ result |= ASPM_STATE_L1_1_PCIPM;
+ if (state & PCIE_LINK_STATE_L1_2_PCIPM)
+ result |= ASPM_STATE_L1_2_PCIPM;
+
+ return result;
+}
+
static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
{
struct pcie_link_state *link = pcie_aspm_get_link(pdev);
@@ -1063,18 +1083,7 @@ static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
if (sem)
down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
- if (state & PCIE_LINK_STATE_L0S)
- link->aspm_disable |= ASPM_STATE_L0S;
- if (state & PCIE_LINK_STATE_L1)
- link->aspm_disable |= ASPM_STATE_L1;
- if (state & PCIE_LINK_STATE_L1_1)
- link->aspm_disable |= ASPM_STATE_L1_1;
- if (state & PCIE_LINK_STATE_L1_2)
- link->aspm_disable |= ASPM_STATE_L1_2;
- if (state & PCIE_LINK_STATE_L1_1_PCIPM)
- link->aspm_disable |= ASPM_STATE_L1_1_PCIPM;
- if (state & PCIE_LINK_STATE_L1_2_PCIPM)
- link->aspm_disable |= ASPM_STATE_L1_2_PCIPM;
+ link->aspm_disable |= pci_link_state_mask(state);
pcie_config_aspm_link(link, policy_to_aspm_state(link));
if (state & PCIE_LINK_STATE_CLKPM)