From fa285baf844303d119d657d4f97e0777acd51b8e Mon Sep 17 00:00:00 2001 From: "Saheed O. Bolarinwa" Date: Fri, 19 Nov 2021 20:37:32 +0100 Subject: [PATCH] PCI/ASPM: Remove struct aspm_latency The struct aspm_latency is now used only inside pcie_aspm_check_latency(). Replace struct aspm_latency variables with u32 variables and remove struct aspm_latency. Link: https://lore.kernel.org/r/20211119193732.12343-5-refactormyself@gmail.com Signed-off-by: Saheed O. Bolarinwa Signed-off-by: Bjorn Helgaas Reviewed-by: Christoph Hellwig --- drivers/pci/pcie/aspm.c | 32 +++++++++++++------------------- 1 file changed, 13 insertions(+), 19 deletions(-) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 9faefb4..c6d2e76 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -41,11 +41,6 @@ #define ASPM_STATE_ALL (ASPM_STATE_L0S | ASPM_STATE_L1 | \ ASPM_STATE_L1SS) -struct aspm_latency { - u32 l0s; /* L0s latency (nsec) */ - u32 l1; /* L1 latency (nsec) */ -}; - struct pcie_link_state { struct pci_dev *pdev; /* Upstream component of the Link */ struct pci_dev *downstream; /* Downstream component, function 0 */ @@ -384,9 +379,9 @@ static void encode_l12_threshold(u32 threshold_us, u32 *scale, u32 *value) static void pcie_aspm_check_latency(struct pci_dev *endpoint) { u32 latency, encoding, lnkcap_up, lnkcap_dw; - u32 l1_switch_latency = 0; - struct aspm_latency latency_up, latency_dw; - struct aspm_latency *acceptable; + u32 l1_switch_latency = 0, latency_up_l0s; + u32 latency_up_l1, latency_dw_l0s, latency_dw_l1; + u32 acceptable_l0s, acceptable_l1; struct pcie_link_state *link; /* Device not in D0 doesn't need latency check */ @@ -398,11 +393,11 @@ static void pcie_aspm_check_latency(struct pci_dev *endpoint) /* Calculate endpoint L0s acceptable latency */ encoding = (endpoint->devcap & PCI_EXP_DEVCAP_L0S) >> 6; - acceptable->l0s = calc_l0s_acceptable(encoding); + acceptable_l0s = calc_l0s_acceptable(encoding); /* Calculate endpoint L1 acceptable latency */ encoding = (endpoint->devcap & PCI_EXP_DEVCAP_L1) >> 9; - acceptable->l1 = calc_l1_acceptable(encoding); + acceptable_l1 = calc_l1_acceptable(encoding); while (link) { struct pci_dev *dev = pci_function_0(link->pdev->subordinate); @@ -412,19 +407,19 @@ static void pcie_aspm_check_latency(struct pci_dev *endpoint) &lnkcap_up); pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap_dw); - latency_up.l0s = calc_l0s_latency(lnkcap_up); - latency_up.l1 = calc_l1_latency(lnkcap_up); - latency_dw.l0s = calc_l0s_latency(lnkcap_dw); - latency_dw.l1 = calc_l1_latency(lnkcap_dw); + latency_up_l0s = calc_l0s_latency(lnkcap_up); + latency_up_l1 = calc_l1_latency(lnkcap_up); + latency_dw_l0s = calc_l0s_latency(lnkcap_dw); + latency_dw_l1 = calc_l1_latency(lnkcap_dw); /* Check upstream direction L0s latency */ if ((link->aspm_capable & ASPM_STATE_L0S_UP) && - (latency_up.l0s > acceptable->l0s)) + (latency_up_l0s > acceptable_l0s)) link->aspm_capable &= ~ASPM_STATE_L0S_UP; /* Check downstream direction L0s latency */ if ((link->aspm_capable & ASPM_STATE_L0S_DW) && - (latency_dw.l0s > acceptable->l0s)) + (latency_dw_l0s > acceptable_l0s)) link->aspm_capable &= ~ASPM_STATE_L0S_DW; /* * Check L1 latency. @@ -439,9 +434,9 @@ static void pcie_aspm_check_latency(struct pci_dev *endpoint) * L1 exit latencies advertised by a device include L1 * substate latencies (and hence do not do any check). */ - latency = max_t(u32, latency_up.l1, latency_dw.l1); + latency = max_t(u32, latency_up_l1, latency_dw_l1); if ((link->aspm_capable & ASPM_STATE_L1) && - (latency + l1_switch_latency > acceptable->l1)) + (latency + l1_switch_latency > acceptable_l1)) link->aspm_capable &= ~ASPM_STATE_L1; l1_switch_latency += 1000; @@ -668,7 +663,6 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist) /* Get and check endpoint acceptable latencies */ list_for_each_entry(child, &linkbus->devices, bus_list) { - if (pci_pcie_type(child) != PCI_EXP_TYPE_ENDPOINT && pci_pcie_type(child) != PCI_EXP_TYPE_LEG_END) continue; -- 2.7.4