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[46.193.69.61]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a099b178absm19500236f8f.97.2025.05.08.00.10.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 May 2025 00:10:37 -0700 (PDT) From: Manivannan Sadhasivam Date: Thu, 08 May 2025 12:40:32 +0530 Subject: [PATCH v4 3/5] PCI: host-common: Make the driver as a common library for host controller drivers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250508-pcie-reset-slot-v4-3-7050093e2b50@linaro.org> References: <20250508-pcie-reset-slot-v4-0-7050093e2b50@linaro.org> In-Reply-To: <20250508-pcie-reset-slot-v4-0-7050093e2b50@linaro.org> To: Mahesh J Salgaonkar , Oliver O'Halloran , Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Rob Herring , Zhou Wang , Will Deacon , Robert Richter , Alyssa Rosenzweig , Marc Zyngier , Conor Dooley , Daire McNamara Cc: dingwei@marvell.com, cassel@kernel.org, Lukas Wunner , Krishna Chaitanya Chundru , linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, Manivannan Sadhasivam X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=7440; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=9YTGSyyEjJBWzKcv9X508Ju9+VcoznZB2wd8RCZhBIA=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBoHFjp1kFqMhXSTF/eBh/n6fZtF2vM5B0B0c5Ul nv49HMJlUuJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCaBxY6QAKCRBVnxHm/pHO 9du0B/sGQkAQ1jOTMZmz5FNWat7V9HdLSW4K3BY3FD4mEBtb8jIpZDNiJTYBb085icKcXYPQ31M FICFZzr47/EPEyJr5oHdHiHCT8+qdsDKMOpTy2RdIU+iNDY9GUhOtVFVMU28cHFcQsNAtOKy2kx 6Qf1JpijCSxiu+KVABIWBz/rhP8pvPTX2kP+U22LEeMkDtoPjU0HsKK9f3VWPQbHlWZlbO8zQtn G889qzgpaWL0nyW20O6LrdnY/6FAo53jRjxSzQvt9/ufEIqUyTj51abVn0y2cNfYfLC+v1SLdW7 HtCcl1pwMCMjjs3Q5IGertLvu1r/cz+TfDDhWWGVtWqkYZCl X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 This common library will be used as a placeholder for helper functions shared by the host controller drivers. This avoids placing the host controller drivers specific helpers in drivers/pci/*.c, to avoid enlarging the kernel Image on platforms that do not use host controller drivers at all (like x86/ACPI platforms). Suggested-by: Lukas Wunner Signed-off-by: Manivannan Sadhasivam --- drivers/pci/controller/Kconfig | 8 ++++---- drivers/pci/controller/dwc/pcie-hisi.c | 1 + drivers/pci/controller/pci-host-common.c | 6 ++++-- drivers/pci/controller/pci-host-common.h | 16 ++++++++++++++++ drivers/pci/controller/pci-host-generic.c | 2 ++ drivers/pci/controller/pci-thunder-ecam.c | 2 ++ drivers/pci/controller/pci-thunder-pem.c | 1 + drivers/pci/controller/pcie-apple.c | 2 ++ drivers/pci/controller/plda/pcie-microchip-host.c | 1 + include/linux/pci-ecam.h | 6 ------ 10 files changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 9800b768105402d6dd1ba4b134c2ec23da6e4201..9bb8bf669a807272777b6168d04= 2f8fd7490aeec 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -3,6 +3,10 @@ menu "PCI controller drivers" depends on PCI =20 +config PCI_HOST_COMMON + tristate + select PCI_ECAM + config PCI_AARDVARK tristate "Aardvark PCIe controller" depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST @@ -119,10 +123,6 @@ config PCI_FTPCI100 depends on OF default ARCH_GEMINI =20 -config PCI_HOST_COMMON - tristate - select PCI_ECAM - config PCI_HOST_GENERIC tristate "Generic PCI host controller" depends on OF diff --git a/drivers/pci/controller/dwc/pcie-hisi.c b/drivers/pci/controlle= r/dwc/pcie-hisi.c index 8904b5b85ee589576afcb6c81bb4bd39ff960c15..3c17897e56fcb60ec08cf522ee1= 485f90a2f36a3 100644 --- a/drivers/pci/controller/dwc/pcie-hisi.c +++ b/drivers/pci/controller/dwc/pcie-hisi.c @@ -15,6 +15,7 @@ #include #include #include "../../pci.h" +#include "../pci-host-common.h" =20 #if defined(CONFIG_PCI_HISI) || (defined(CONFIG_ACPI) && defined(CONFIG_PC= I_QUIRKS)) =20 diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/control= ler/pci-host-common.c index f441bfd6f96a8bde1c07fcf97d43d0693c424a27..f93bc7034e697250711833a5151= f7ef177cd62a0 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Generic PCI host driver common code + * Common library for PCI host controller drivers * * Copyright (C) 2014 ARM Limited * @@ -15,6 +15,8 @@ #include #include =20 +#include "pci-host-common.h" + static void gen_pci_unmap_cfg(void *ptr) { pci_ecam_free((struct pci_config_window *)ptr); @@ -94,5 +96,5 @@ void pci_host_common_remove(struct platform_device *pdev) } EXPORT_SYMBOL_GPL(pci_host_common_remove); =20 -MODULE_DESCRIPTION("Generic PCI host common driver"); +MODULE_DESCRIPTION("Common library for PCI host controller drivers"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/pci/controller/pci-host-common.h b/drivers/pci/control= ler/pci-host-common.h new file mode 100644 index 0000000000000000000000000000000000000000..d8be024ca68d43afb147fd9104d= 632b907277144 --- /dev/null +++ b/drivers/pci/controller/pci-host-common.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Common library for PCI host controller drivers + * + * Copyright (C) 2014 ARM Limited + * + * Author: Will Deacon + */ + +#ifndef _PCI_HOST_COMMON_H +#define _PCI_HOST_COMMON_H + +int pci_host_common_probe(struct platform_device *pdev); +void pci_host_common_remove(struct platform_device *pdev); + +#endif diff --git a/drivers/pci/controller/pci-host-generic.c b/drivers/pci/contro= ller/pci-host-generic.c index 4051b9b61dace669422e5a6453cc9f58a081beb5..c1bc0d34348f44c9fdd549811f6= 37fb50fe89c64 100644 --- a/drivers/pci/controller/pci-host-generic.c +++ b/drivers/pci/controller/pci-host-generic.c @@ -14,6 +14,8 @@ #include #include =20 +#include "pci-host-common.h" + static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops =3D { .bus_shift =3D 16, .pci_ops =3D { diff --git a/drivers/pci/controller/pci-thunder-ecam.c b/drivers/pci/contro= ller/pci-thunder-ecam.c index 08161065a89c35a95714df935ef437dfc8845697..b5b4a958e6a22b21501cad45bb2= 42a95a784efc1 100644 --- a/drivers/pci/controller/pci-thunder-ecam.c +++ b/drivers/pci/controller/pci-thunder-ecam.c @@ -11,6 +11,8 @@ #include #include =20 +#include "pci-host-common.h" + #if defined(CONFIG_PCI_HOST_THUNDER_ECAM) || (defined(CONFIG_ACPI) && defi= ned(CONFIG_PCI_QUIRKS)) =20 static void set_val(u32 v, int where, int size, u32 *val) diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/control= ler/pci-thunder-pem.c index f1bd5de67997cddac173723bc7f4ec20aaf20064..5fa037fb61dc356f3029d1b5cae= 632ae1da5bb9b 100644 --- a/drivers/pci/controller/pci-thunder-pem.c +++ b/drivers/pci/controller/pci-thunder-pem.c @@ -14,6 +14,7 @@ #include #include #include "../pci.h" +#include "pci-host-common.h" =20 #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defin= ed(CONFIG_PCI_QUIRKS)) =20 diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/p= cie-apple.c index 18e11b9a7f46479348815c3f706319189e0a80b5..edd4c8c683c6a693401b47f5f05= 6641c13ae89f8 100644 --- a/drivers/pci/controller/pcie-apple.c +++ b/drivers/pci/controller/pcie-apple.c @@ -29,6 +29,8 @@ #include #include =20 +#include "pci-host-common.h" + #define CORE_RC_PHYIF_CTL 0x00024 #define CORE_RC_PHYIF_CTL_RUN BIT(0) #define CORE_RC_PHYIF_STAT 0x00028 diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pc= i/controller/plda/pcie-microchip-host.c index 3fdfffdf027001bf88df8e1c2538587298228220..24bbf93b8051fa0d9027ce6983e= ae34cad81065e 100644 --- a/drivers/pci/controller/plda/pcie-microchip-host.c +++ b/drivers/pci/controller/plda/pcie-microchip-host.c @@ -23,6 +23,7 @@ #include =20 #include "../../pci.h" +#include "../pci-host-common.h" #include "pcie-plda.h" =20 #define MC_MAX_NUM_INBOUND_WINDOWS 8 diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h index 3a10f8cfc3ad5c90585a8fc971be714011ed18fe..d930651473b4d0b406e657a24ed= e87e09517d091 100644 --- a/include/linux/pci-ecam.h +++ b/include/linux/pci-ecam.h @@ -93,10 +93,4 @@ extern const struct pci_ecam_ops al_pcie_ops; /* Amazon = Annapurna Labs PCIe */ extern const struct pci_ecam_ops tegra194_pcie_ops; /* Tegra194 PCIe */ extern const struct pci_ecam_ops loongson_pci_ecam_ops; /* Loongson PCIe */ #endif - -#if IS_ENABLED(CONFIG_PCI_HOST_COMMON) -/* for DT-based PCI controllers that support ECAM */ -int pci_host_common_probe(struct platform_device *pdev); -void pci_host_common_remove(struct platform_device *pdev); -#endif #endif --=20 2.43.0