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[84.2.198.93]) by smtp.gmail.com with ESMTPSA id i7sm2641735ejo.22.2020.09.24.08.24.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2020 08:24:17 -0700 (PDT) From: "Saheed O. Bolarinwa" To: helgaas@kernel.org Cc: "Saheed O. Bolarinwa" , linux-pci@vger.kernel.org Subject: [PATCH v2 5/7] PCI/ASPM: Remove aspm_register_info.l1ss_ctl* Date: Thu, 24 Sep 2020 16:24:41 +0200 Message-Id: <20200924142443.260861-6-refactormyself@gmail.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20200924142443.260861-1-refactormyself@gmail.com> References: <20200924142443.260861-1-refactormyself@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org - Read the value of PCI_L1SS_CTL1 directly and cache in local variables. - Replace references to aspm_register_info.l1ss_ctl1 with the variables. - In pcie_get_aspm_reg() remove reference to aspm_register_info.l1ss_ctl* - In pcie_get_aspm_reg() remove reading PCI_L1SS_CTL1 and PCI_L1SS_CTL2 - Remove aspm_register_info.(l1ss_ctl1 && l1ss_ctl2) Note that aspm_register_info.l1ss_ctl2 is eliminated totally since it is not used. Signed-off-by: Saheed O. Bolarinwa --- drivers/pci/pcie/aspm.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index e7bb7d069361..cec8acad6363 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -384,10 +384,6 @@ static void encode_l12_threshold(u32 threshold_us, u32 *scale, u32 *value) struct aspm_register_info { u32 enabled:2; - - /* L1 substates */ - u32 l1ss_ctl1; - u32 l1ss_ctl2; }; static void pcie_get_aspm_reg(struct pci_dev *pdev, @@ -397,11 +393,6 @@ static void pcie_get_aspm_reg(struct pci_dev *pdev, pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &ctl); info->enabled = ctl & PCI_EXP_LNKCTL_ASPMC; - - pci_read_config_dword(pdev, info->l1ss_cap_ptr + PCI_L1SS_CTL1, - &info->l1ss_ctl1); - pci_read_config_dword(pdev, info->l1ss_cap_ptr + PCI_L1SS_CTL2, - &info->l1ss_ctl2); } static void pcie_aspm_check_latency(struct pci_dev *endpoint) @@ -525,6 +516,7 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist) struct pci_dev *child = link->downstream, *parent = link->pdev; struct pci_bus *linkbus = parent->subordinate; struct aspm_register_info upreg, dwreg; + u32 up_l1ss_ctl1, dw_l1ss_ctl1; if (blacklist) { /* Set enabled/disable so that we will disable ASPM later */ @@ -547,6 +539,11 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist) /* Configure common clock before checking latencies */ pcie_aspm_configure_common_clock(link); + pci_read_config_dword(parent, parent->l1ss_cap_ptr + PCI_L1SS_CTL1, + &up_l1ss_ctl1); + pci_read_config_dword(child, child->l1ss_cap_ptr + PCI_L1SS_CTL1, + &dw_l1ss_ctl1); + /* * Re-read upstream/downstream components' register state * after clock configuration @@ -590,13 +587,13 @@ static void pcie_aspm_cap_init(struct pcie_link_state *link, int blacklist) if (parent->l1ss_cap & child->l1ss_cap & PCI_L1SS_CAP_PCIPM_L1_2) link->aspm_support |= ASPM_STATE_L1_2_PCIPM; - if (upreg.l1ss_ctl1 & dwreg.l1ss_ctl1 & PCI_L1SS_CTL1_ASPM_L1_1) + if (up_l1ss_ctl1 & dw_l1ss_ctl1 & PCI_L1SS_CTL1_ASPM_L1_1) link->aspm_enabled |= ASPM_STATE_L1_1; - if (upreg.l1ss_ctl1 & dwreg.l1ss_ctl1 & PCI_L1SS_CTL1_ASPM_L1_2) + if (up_l1ss_ctl1 & dw_l1ss_ctl1 & PCI_L1SS_CTL1_ASPM_L1_2) link->aspm_enabled |= ASPM_STATE_L1_2; - if (upreg.l1ss_ctl1 & dwreg.l1ss_ctl1 & PCI_L1SS_CTL1_PCIPM_L1_1) + if (up_l1ss_ctl1 & dw_l1ss_ctl1 & PCI_L1SS_CTL1_PCIPM_L1_1) link->aspm_enabled |= ASPM_STATE_L1_1_PCIPM; - if (upreg.l1ss_ctl1 & dwreg.l1ss_ctl1 & PCI_L1SS_CTL1_PCIPM_L1_2) + if (up_l1ss_ctl1 & dw_l1ss_ctl1 & PCI_L1SS_CTL1_PCIPM_L1_2) link->aspm_enabled |= ASPM_STATE_L1_2_PCIPM; if (link->aspm_support & ASPM_STATE_L1SS) -- 2.18.4