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| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2023-09-15 17:57:49 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-10-10 23:03:51 +0200 |
| commit | e13b72b819245027f960ce7a3735c4fe24fab024 (patch) | |
| tree | 49a3fd6349a4426d4a426890fb21692c2bba1c22 /drivers/pci/pcie | |
| parent | PCI/ASPM: Return U32_MAX instead of bit magic construct (diff) | |
| download | linux-e13b72b819245027f960ce7a3735c4fe24fab024.tar.xz linux-e13b72b819245027f960ce7a3735c4fe24fab024.zip | |
PCI/ASPM: Use time constants
Use defined constants to convert between time units.
Link: https://lore.kernel.org/r/20230915155752.84640-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 4cd11ab27233..60135fc7281a 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -21,6 +21,8 @@ #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/delay.h> +#include <linux/time.h> + #include "../pci.h" #ifdef MODULE_PARAM_PREFIX @@ -272,7 +274,7 @@ static u32 calc_l0s_latency(u32 lnkcap) u32 encoding = FIELD_GET(PCI_EXP_LNKCAP_L0SEL, lnkcap); if (encoding == 0x7) - return (5 * 1000); /* > 4us */ + return 5 * NSEC_PER_USEC; /* > 4us */ return (64 << encoding); } @@ -290,8 +292,8 @@ static u32 calc_l1_latency(u32 lnkcap) u32 encoding = FIELD_GET(PCI_EXP_LNKCAP_L1EL, lnkcap); if (encoding == 0x7) - return (65 * 1000); /* > 64us */ - return (1000 << encoding); + return 65 * NSEC_PER_USEC; /* > 64us */ + return NSEC_PER_USEC << encoding; } /* Convert L1 acceptable latency encoding to ns */ @@ -299,7 +301,7 @@ static u32 calc_l1_acceptable(u32 encoding) { if (encoding == 0x7) return U32_MAX; - return (1000 << encoding); + return NSEC_PER_USEC << encoding; } /* Convert L1SS T_pwr encoding to usec */ @@ -327,7 +329,7 @@ static u32 calc_l12_pwron(struct pci_dev *pdev, u32 scale, u32 val) */ static void encode_l12_threshold(u32 threshold_us, u32 *scale, u32 *value) { - u64 threshold_ns = (u64) threshold_us * 1000; + u64 threshold_ns = (u64)threshold_us * NSEC_PER_USEC; /* * LTR_L1.2_THRESHOLD_Value ("value") is a 10-bit field with max @@ -419,7 +421,7 @@ static void pcie_aspm_check_latency(struct pci_dev *endpoint) if ((link->aspm_capable & ASPM_STATE_L1) && (latency + l1_switch_latency > acceptable_l1)) link->aspm_capable &= ~ASPM_STATE_L1; - l1_switch_latency += 1000; + l1_switch_latency += NSEC_PER_USEC; link = link->parent; } |