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Hou" To: "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "bhelgaas@google.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "l.subrahmanya@mobiveil.co.in" , "shawnguo@kernel.org" , Leo Li , "lorenzo.pieralisi@arm.com" , "catalin.marinas@arm.com" , "will.deacon@arm.com" CC: Mingkai Hu , "M.h. Lian" , Xiaowei Bao , "Z.q. Hou" Subject: [PATCHv2 16/25] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP driver Thread-Topic: [PATCHv2 16/25] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP driver Thread-Index: AQHUgLM5VxJKmLTanke1a+Ns2blnaA== Date: Tue, 20 Nov 2018 09:27:15 +0000 Message-ID: <20181120092615.11680-17-Zhiqiang.Hou@nxp.com> References: <20181120092615.11680-1-Zhiqiang.Hou@nxp.com> In-Reply-To: <20181120092615.11680-1-Zhiqiang.Hou@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK2PR03CA0050.apcprd03.prod.outlook.com (2603:1096:202:17::20) To AM6PR04MB5781.eurprd04.prod.outlook.com (2603:10a6:20b:aa::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=zhiqiang.hou@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.73] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;AM6PR04MB5269;6:yag3sFlVxxtdc0J+PMjAPKTSzMYkLnXI0m09WqihRxskXZYe2HvgMa6BKBCDxm+t4uhVyhMq/5ALbmcrddfipNhS/R5Vo6knKcxI7ezqoe/1NVkj7Kef1lS2uzlac5BMtkEuFWYbtm493fBkFzfgO4UcGanoGIvCWyDAdcr9i1V8u/Wr4J9DDnZwz0vY1LQ2FxOVAHmPGHJJXVvRALjkIlqQwfmKNBuxI2SSFnAR1fQH+9094KkHEb6s7kiz4ylMJIjHWEJTafoOV0rnq2jf/Cq5eNKtqPJp+9qFQoL/8IpcbNf5ohNeNZhctcnK0H9EheWpKugqJ+JAKN9OyVqNEKEiG2Tm9y++/TRNEpdg4SJ6MHe7FgwXGiDWoFbIFhzipiK4M0E1DNk2ZlEGSvnmT+2fUtsZuC8OSMi14JTL5rBSlJVd3G6DyQPzuRvHpCtTXMFhd5xASbhIGlnpxeM+wg==;5:nKQ7yotUAEh8FKVi/zHw+L5ho5QhTvd2AxabFBrXYeVU1fridslKxzwWChKrb9h/akVAH+4D6Fa0lt2AJKXic49CX+g+e83ss5ec60NOxHyttu6m4eGCfbcrx850QmL639V06nEWvCBkbWIleM2FguRIQZwDjVGSjBDKaAqY5g8=;7:+ppcE/5XsuLvkcnvgVydbVAzqsy9hY2gQhVUFVlgz5s7stH5fsRZPAQSxOHzII8ZYZ96XVru6TUQtG/t9hgCBfzKkF99nSS49a2vjfvTv906PkhLXTNBW1vDWdQeHQtDdinj39aP7J9xZa8I0KAgyw== x-ms-office365-filtering-correlation-id: 130a748c-9d2d-42e6-f910-08d64eca5bb2 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390098)(7020095)(4652040)(8989299)(5600074)(711020)(4618075)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7153060)(7193020);SRVR:AM6PR04MB5269; x-ms-traffictypediagnostic: AM6PR04MB5269: x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(3231442)(944501410)(52105112)(3002001)(10201501046)(93006095)(93001095)(6055026)(148016)(149066)(150057)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123558120)(20161123564045)(20161123560045)(20161123562045)(201708071742011)(7699051)(76991095);SRVR:AM6PR04MB5269;BCL:0;PCL:0;RULEID:;SRVR:AM6PR04MB5269; x-forefront-prvs: 08626BE3A5 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(346002)(376002)(136003)(396003)(366004)(39860400002)(189003)(199004)(305945005)(7736002)(36756003)(5660300001)(7416002)(68736007)(2906002)(4326008)(8936002)(14454004)(5024004)(256004)(54906003)(14444005)(4744004)(53936002)(6436002)(71200400001)(110136005)(71190400001)(6512007)(53946003)(316002)(2616005)(476003)(446003)(11346002)(486006)(25786009)(2501003)(2201001)(86362001)(575784001)(52116002)(76176011)(6506007)(102836004)(386003)(186003)(106356001)(26005)(2900100001)(81156014)(81166006)(105586002)(6486002)(8676002)(99286004)(66066001)(6116002)(3846002)(1076002)(478600001)(97736004)(921003)(1121003)(579004)(569006);DIR:OUT;SFP:1101;SCL:1;SRVR:AM6PR04MB5269;H:AM6PR04MB5781.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: 6wjkim7BqN9zC6b/yHVcKce4BCf+Zyj1LK1OHbreAwjjul+z4MRyavj21meQWQW/ni+Iy5oUuPW3nyf3QdKHFHVlL5OyK5cIhwuXK+fn4AzGtuiPx6xLWwVFGHEw3JEAHvZUEhPDXLfYSDnY7sE5l/NqWCgiw3j6T05fd7WNxWk8tR8p5I1ufcG78OShPWQ15/o2olrFAU5O8t/xb49KlvvPUKrzO8cqnb/Zm2xokqk2HKP86ikRcppnTzabAiL7fUutBRMODmTXqlL/JM9qw0rlWMXKwA2fFayNA8vPM8KQrlj+3SG7IkVUIjjSn3xDExVR650Xv1CtD5cQgjcWitRWa+aT8pSpT36kWHIYrq0= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 130a748c-9d2d-42e6-f910-08d64eca5bb2 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Nov 2018 09:27:15.3007 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB5269 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hou Zhiqiang As the Mobiveil PCIe controller support RC&EP DAUL mode, and to make platforms which integrated the Mobiveil PCIe IP more easy to add their drivers, this patch moved the Mobiveil driver to a new directory 'drivers/pci/controller/mobiveil' and refactored it according to the abstraction of RC&EP (EP driver will be added later). Signed-off-by: Hou Zhiqiang --- V2: - Move interrupts enabling to interrupt init function and revert to just enable INTX and MSI. MAINTAINERS | 2 +- drivers/pci/controller/Kconfig | 11 +- drivers/pci/controller/Makefile | 2 +- drivers/pci/controller/mobiveil/Kconfig | 24 + drivers/pci/controller/mobiveil/Makefile | 4 + .../pcie-mobiveil-host.c} | 528 +++--------------- .../controller/mobiveil/pcie-mobiveil-plat.c | 54 ++ .../pci/controller/mobiveil/pcie-mobiveil.c | 228 ++++++++ .../pci/controller/mobiveil/pcie-mobiveil.h | 187 +++++++ 9 files changed, 587 insertions(+), 453 deletions(-) create mode 100644 drivers/pci/controller/mobiveil/Kconfig create mode 100644 drivers/pci/controller/mobiveil/Makefile rename drivers/pci/controller/{pcie-mobiveil.c =3D> mobiveil/pcie-mobiveil= -host.c} (55%) create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h diff --git a/MAINTAINERS b/MAINTAINERS index 2d916afea75d..084d225583e0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11447,7 +11447,7 @@ M: Subrahmanya Lingappa L: linux-pci@vger.kernel.org S: Supported F: Documentation/devicetree/bindings/pci/mobiveil-pcie.txt -F: drivers/pci/controller/pcie-mobiveil.c +F: drivers/pci/controller/mobiveil/pcie-mobiveil* =20 PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support) M: Thomas Petazzoni diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfi= g index 6671946dbf66..0e981ed00a75 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -241,16 +241,6 @@ config PCIE_MEDIATEK Say Y here if you want to enable PCIe controller support on MediaTek SoCs. =20 -config PCIE_MOBIVEIL - bool "Mobiveil AXI PCIe controller" - depends on ARCH_ZYNQMP || COMPILE_TEST - depends on OF - depends on PCI_MSI_IRQ_DOMAIN - help - Say Y here if you want to enable support for the Mobiveil AXI PCIe - Soft IP. It has up to 8 outbound and inbound windows - for address translation and it is a PCIe Gen4 IP. - config PCIE_TANGO_SMP8759 bool "Tango SMP8759 PCIe controller (DANGEROUS)" depends on ARCH_TANGO && PCI_MSI && OF @@ -281,4 +271,5 @@ config VMD module will be called vmd. =20 source "drivers/pci/controller/dwc/Kconfig" +source "drivers/pci/controller/mobiveil/Kconfig" endmenu diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makef= ile index d56a507495c5..b79a615041a0 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -26,11 +26,11 @@ obj-$(CONFIG_PCIE_ROCKCHIP) +=3D pcie-rockchip.o obj-$(CONFIG_PCIE_ROCKCHIP_EP) +=3D pcie-rockchip-ep.o obj-$(CONFIG_PCIE_ROCKCHIP_HOST) +=3D pcie-rockchip-host.o obj-$(CONFIG_PCIE_MEDIATEK) +=3D pcie-mediatek.o -obj-$(CONFIG_PCIE_MOBIVEIL) +=3D pcie-mobiveil.o obj-$(CONFIG_PCIE_TANGO_SMP8759) +=3D pcie-tango.o obj-$(CONFIG_VMD) +=3D vmd.o # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW obj-y +=3D dwc/ +obj-y +=3D mobiveil/ =20 =20 # The following drivers are for devices that use the generic ACPI diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controll= er/mobiveil/Kconfig new file mode 100644 index 000000000000..64343c07bfed --- /dev/null +++ b/drivers/pci/controller/mobiveil/Kconfig @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 + +menu "Mobiveil PCIe Core Support" + depends on PCI + +config PCIE_MOBIVEIL + bool + +config PCIE_MOBIVEIL_HOST + bool + depends on PCI_MSI_IRQ_DOMAIN + select PCIE_MOBIVEIL + +config PCIE_MOBIVEIL_PLAT + bool "Mobiveil AXI PCIe controller" + depends on ARCH_ZYNQMP || COMPILE_TEST + depends on OF + select PCIE_MOBIVEIL_HOST + help + Say Y here if you want to enable support for the Mobiveil AXI PCIe + Soft IP. It has up to 8 outbound and inbound windows + for address translation and it is a PCIe Gen4 IP. + +endmenu diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/control= ler/mobiveil/Makefile new file mode 100644 index 000000000000..9fb6d1c6504d --- /dev/null +++ b/drivers/pci/controller/mobiveil/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_PCIE_MOBIVEIL) +=3D pcie-mobiveil.o +obj-$(CONFIG_PCIE_MOBIVEIL_HOST) +=3D pcie-mobiveil-host.o +obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) +=3D pcie-mobiveil-plat.o diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controlle= r/mobiveil/pcie-mobiveil-host.c similarity index 55% rename from drivers/pci/controller/pcie-mobiveil.c rename to drivers/pci/controller/mobiveil/pcie-mobiveil-host.c index 9210165fe8c0..dc5324d94466 100644 --- a/drivers/pci/controller/pcie-mobiveil.c +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c @@ -4,9 +4,9 @@ * * Copyright (c) 2018 Mobiveil Inc. * Author: Subrahmanya Lingappa + * Refactor: Zhiqiang Hou */ =20 -#include #include #include #include @@ -23,275 +23,21 @@ #include #include =20 -#include "../pci.h" - -/* register offsets and bit positions */ - -/* - * translation tables are grouped into windows, each window registers are - * grouped into blocks of 4 or 16 registers each - */ -#define PAB_REG_BLOCK_SIZE 16 -#define PAB_EXT_REG_BLOCK_SIZE 4 - -#define PAB_REG_ADDR(offset, win) \ - (offset + (win * PAB_REG_BLOCK_SIZE)) -#define PAB_EXT_REG_ADDR(offset, win) \ - (offset + (win * PAB_EXT_REG_BLOCK_SIZE)) - -#define LTSSM_STATUS 0x0404 -#define LTSSM_STATUS_L0_MASK 0x3f -#define LTSSM_STATUS_L0 0x2d - -#define PAB_CTRL 0x0808 -#define AMBA_PIO_ENABLE_SHIFT 0 -#define PEX_PIO_ENABLE_SHIFT 1 -#define PAGE_SEL_SHIFT 13 -#define PAGE_SEL_MASK 0x3f -#define PAGE_LO_MASK 0x3ff -#define PAGE_SEL_OFFSET_SHIFT 10 - -#define PAB_AXI_PIO_CTRL 0x0840 -#define APIO_EN_MASK 0xf - -#define PAB_PEX_PIO_CTRL 0x08c0 -#define PIO_ENABLE_SHIFT 0 - -#define PAB_INTP_AMBA_MISC_ENB 0x0b0c -#define PAB_INTP_AMBA_MISC_STAT 0x0b1c -#define PAB_INTP_INTX_MASK 0x01e0 -#define PAB_INTP_MSI_MASK 0x8 - -#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) -#define WIN_ENABLE_SHIFT 0 -#define WIN_TYPE_SHIFT 1 -#define WIN_TYPE_MASK 0x3 -#define WIN_SIZE_SHIFT 10 -#define WIN_SIZE_MASK 0x3fffff - -#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win) - -#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win) -#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win) -#define AXI_WINDOW_ALIGN_MASK 3 - -#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win) -#define PAB_BUS_SHIFT 24 -#define PAB_DEVICE_SHIFT 19 -#define PAB_FUNCTION_SHIFT 16 - -#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win) -#define PAB_INTP_AXI_PIO_CLASS 0x474 - -#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) -#define AMAP_CTRL_EN_SHIFT 0 -#define AMAP_CTRL_TYPE_SHIFT 1 -#define AMAP_CTRL_TYPE_MASK 3 - -#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win) -#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win) -#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win) -#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win) -#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win) - -/* starting offset of INTX bits in status register */ -#define PAB_INTX_START 5 - -/* supported number of MSI interrupts */ -#define PCI_NUM_MSI 16 - -/* MSI registers */ -#define MSI_BASE_LO_OFFSET 0x04 -#define MSI_BASE_HI_OFFSET 0x08 -#define MSI_SIZE_OFFSET 0x0c -#define MSI_ENABLE_OFFSET 0x14 -#define MSI_STATUS_OFFSET 0x18 -#define MSI_DATA_OFFSET 0x20 -#define MSI_ADDR_L_OFFSET 0x24 -#define MSI_ADDR_H_OFFSET 0x28 - -/* outbound and inbound window definitions */ -#define WIN_NUM_0 0 -#define WIN_NUM_1 1 -#define CFG_WINDOW_TYPE 0 -#define IO_WINDOW_TYPE 1 -#define MEM_WINDOW_TYPE 2 -#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) -#define MAX_PIO_WINDOWS 8 - -/* Parameters for the waiting for link up routine */ -#define LINK_WAIT_MAX_RETRIES 10 -#define LINK_WAIT_MIN 90000 -#define LINK_WAIT_MAX 100000 - -#define PAGED_ADDR_BNDRY 0xc00 -#define OFFSET_TO_PAGE_ADDR(off) \ - ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY) -#define OFFSET_TO_PAGE_IDX(off) \ - ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK) - -struct mobiveil_msi { /* MSI information */ - struct mutex lock; /* protect bitmap variable */ - struct irq_domain *msi_domain; - struct irq_domain *dev_domain; - phys_addr_t msi_pages_phys; - int num_of_vectors; - DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); -}; - -struct mobiveil_pcie { - struct platform_device *pdev; - struct list_head resources; - void __iomem *config_axi_slave_base; /* endpoint config base */ - void __iomem *csr_axi_slave_base; /* root port config base */ - void __iomem *apb_csr_base; /* MSI register base */ - phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */ - struct irq_domain *intx_domain; - raw_spinlock_t intx_mask_lock; - int irq; - int apio_wins; - int ppio_wins; - int ob_wins_configured; /* configured outbound windows */ - int ib_wins_configured; /* configured inbound windows */ - struct resource *ob_io_res; - char root_bus_nr; - struct mobiveil_msi msi; -}; - -/* - * mobiveil_pcie_sel_page - routine to access paged register - * - * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged= , - * for this scheme to work extracted higher 6 bits of the offset will be - * written to pg_sel field of PAB_CTRL register and rest of the lower 10 - * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register. - */ -static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx) -{ - u32 val; - - val =3D readl(pcie->csr_axi_slave_base + PAB_CTRL); - val &=3D ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT); - val |=3D (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT; - - writel(val, pcie->csr_axi_slave_base + PAB_CTRL); -} - -static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off) -{ - if (off < PAGED_ADDR_BNDRY) { - /* For directly accessed registers, clear the pg_sel field */ - mobiveil_pcie_sel_page(pcie, 0); - return pcie->csr_axi_slave_base + off; - } - - mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off)); - return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off); -} - -static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val) -{ - if ((uintptr_t)addr & (size - 1)) { - *val =3D 0; - return PCIBIOS_BAD_REGISTER_NUMBER; - } - - switch (size) { - case 4: - *val =3D readl(addr); - break; - case 2: - *val =3D readw(addr); - break; - case 1: - *val =3D readb(addr); - break; - default: - *val =3D 0; - return PCIBIOS_BAD_REGISTER_NUMBER; - } - - return PCIBIOS_SUCCESSFUL; -} - -static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val) -{ - if ((uintptr_t)addr & (size - 1)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - switch (size) { - case 4: - writel(val, addr); - break; - case 2: - writew(val, addr); - break; - case 1: - writeb(val, addr); - break; - default: - return PCIBIOS_BAD_REGISTER_NUMBER; - } - - return PCIBIOS_SUCCESSFUL; -} - -static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size) -{ - void *addr; - u32 val; - int ret; - - addr =3D mobiveil_pcie_comp_addr(pcie, off); - - ret =3D mobiveil_pcie_read(addr, size, &val); - if (ret) - dev_err(&pcie->pdev->dev, "read CSR address failed\n"); - - return val; -} - -static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t= size) -{ - void *addr; - int ret; - - addr =3D mobiveil_pcie_comp_addr(pcie, off); - - ret =3D mobiveil_pcie_write(addr, size, val); - if (ret) - dev_err(&pcie->pdev->dev, "write CSR address failed\n"); -} - -static u32 csr_readl(struct mobiveil_pcie *pcie, u32 off) -{ - return csr_read(pcie, off, 0x4); -} - -static void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off) -{ - csr_write(pcie, val, off, 0x4); -} - -static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie) -{ - return (csr_readl(pcie, LTSSM_STATUS) & - LTSSM_STATUS_L0_MASK) =3D=3D LTSSM_STATUS_L0; -} +#include "pcie-mobiveil.h" =20 static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int d= evfn) { struct mobiveil_pcie *pcie =3D bus->sysdata; =20 /* Only one device down on each root port */ - if ((bus->number =3D=3D pcie->root_bus_nr) && (devfn > 0)) + if ((bus->number =3D=3D pcie->rp.root_bus_nr) && (devfn > 0)) return false; =20 /* * Do not read more than one device on the bus directly * attached to RC */ - if ((bus->primary =3D=3D pcie->root_bus_nr) && (devfn > 0)) + if ((bus->primary =3D=3D pcie->rp.root_bus_nr) && (devfn > 0)) return false; =20 return true; @@ -311,7 +57,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bu= s *bus, return NULL; =20 /* RC config access */ - if (bus->number =3D=3D pcie->root_bus_nr) + if (bus->number =3D=3D pcie->rp.root_bus_nr) return pcie->csr_axi_slave_base + where; =20 /* @@ -326,7 +72,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bu= s *bus, =20 csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0)); =20 - return pcie->config_axi_slave_base + where; + return pcie->rp.config_axi_slave_base + where; } =20 static struct pci_ops mobiveil_pcie_ops =3D { @@ -340,7 +86,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) struct irq_chip *chip =3D irq_desc_get_chip(desc); struct mobiveil_pcie *pcie =3D irq_desc_get_handler_data(desc); struct device *dev =3D &pcie->pdev->dev; - struct mobiveil_msi *msi =3D &pcie->msi; + struct mobiveil_msi *msi =3D &pcie->rp.msi; u32 msi_data, msi_addr_lo, msi_addr_hi; u32 intr_status, msi_status; unsigned long shifted_status; @@ -365,7 +111,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) shifted_status >>=3D PAB_INTX_START; do { for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) { - virq =3D irq_find_mapping(pcie->intx_domain, + virq =3D irq_find_mapping(pcie->rp.intx_domain, bit + 1); if (virq) generic_handle_irq(virq); @@ -428,10 +174,10 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pci= e *pcie) /* map config resource */ res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "config_axi_slave"); - pcie->config_axi_slave_base =3D devm_pci_remap_cfg_resource(dev, res); - if (IS_ERR(pcie->config_axi_slave_base)) - return PTR_ERR(pcie->config_axi_slave_base); - pcie->ob_io_res =3D res; + pcie->rp.config_axi_slave_base =3D devm_pci_remap_cfg_resource(dev, res); + if (IS_ERR(pcie->rp.config_axi_slave_base)) + return PTR_ERR(pcie->rp.config_axi_slave_base); + pcie->rp.ob_io_res =3D res; =20 /* map csr resource */ res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, @@ -441,12 +187,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie= *pcie) return PTR_ERR(pcie->csr_axi_slave_base); pcie->pcie_reg_base =3D res->start; =20 - /* map MSI config resource */ - res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr"); - pcie->apb_csr_base =3D devm_pci_remap_cfg_resource(dev, res); - if (IS_ERR(pcie->apb_csr_base)) - return PTR_ERR(pcie->apb_csr_base); - /* read the number of windows requested */ if (of_property_read_u32(node, "apio-wins", &pcie->apio_wins)) pcie->apio_wins =3D MAX_PIO_WINDOWS; @@ -454,119 +194,15 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pc= ie *pcie) if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins)) pcie->ppio_wins =3D MAX_PIO_WINDOWS; =20 - pcie->irq =3D platform_get_irq(pdev, 0); - if (pcie->irq <=3D 0) { - dev_err(dev, "failed to map IRQ: %d\n", pcie->irq); - return -ENODEV; - } - return 0; } =20 -static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, - u64 cpu_addr, u64 pci_addr, u32 type, u64 size) -{ - u32 value; - u64 size64 =3D ~(size - 1); - - if (win_num >=3D pcie->ppio_wins) { - dev_err(&pcie->pdev->dev, - "ERROR: max inbound windows reached !\n"); - return; - } - - value =3D csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); - value &=3D ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | - WIN_SIZE_MASK << WIN_SIZE_SHIFT); - value |=3D (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) | - (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT); - csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num)); - - csr_writel(pcie, upper_32_bits(size64), - PAB_EXT_PEX_AMAP_SIZEN(win_num)); - - csr_writel(pcie, lower_32_bits(cpu_addr), - PAB_PEX_AMAP_AXI_WIN(win_num)); - csr_writel(pcie, upper_32_bits(cpu_addr), - PAB_EXT_PEX_AMAP_AXI_WIN(win_num)); - - csr_writel(pcie, lower_32_bits(pci_addr), - PAB_PEX_AMAP_PEX_WIN_L(win_num)); - csr_writel(pcie, upper_32_bits(pci_addr), - PAB_PEX_AMAP_PEX_WIN_H(win_num)); - - pcie->ib_wins_configured++; -} - -/* - * routine to program the outbound windows - */ -static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, - u64 cpu_addr, u64 pci_addr, u32 type, u64 size) -{ - - u32 value; - u64 size64 =3D ~(size - 1); - - if (win_num >=3D pcie->apio_wins) { - dev_err(&pcie->pdev->dev, - "ERROR: max outbound windows reached !\n"); - return; - } - - /* - * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit - * to 4 KB in PAB_AXI_AMAP_CTRL register - */ - value =3D csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num)); - value &=3D ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | - WIN_SIZE_MASK << WIN_SIZE_SHIFT); - value |=3D 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT | - (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT); - csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num)); - - csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num)); - - /* - * program AXI window base with appropriate value in - * PAB_AXI_AMAP_AXI_WIN0 register - */ - csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK), - PAB_AXI_AMAP_AXI_WIN(win_num)); - csr_writel(pcie, upper_32_bits(cpu_addr), - PAB_EXT_AXI_AMAP_AXI_WIN(win_num)); - - csr_writel(pcie, lower_32_bits(pci_addr), - PAB_AXI_AMAP_PEX_WIN_L(win_num)); - csr_writel(pcie, upper_32_bits(pci_addr), - PAB_AXI_AMAP_PEX_WIN_H(win_num)); - - pcie->ob_wins_configured++; -} - -static int mobiveil_bringup_link(struct mobiveil_pcie *pcie) -{ - int retries; - - /* check if the link is up or not */ - for (retries =3D 0; retries < LINK_WAIT_MAX_RETRIES; retries++) { - if (mobiveil_pcie_link_up(pcie)) - return 0; - - usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX); - } - - dev_err(&pcie->pdev->dev, "link never came up\n"); - - return -ETIMEDOUT; -} - static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie) { phys_addr_t msg_addr =3D pcie->pcie_reg_base; - struct mobiveil_msi *msi =3D &pcie->msi; + struct mobiveil_msi *msi =3D &pcie->rp.msi; =20 - pcie->msi.num_of_vectors =3D PCI_NUM_MSI; + msi->num_of_vectors =3D PCI_NUM_MSI; msi->msi_pages_phys =3D (phys_addr_t)msg_addr; =20 writel_relaxed(lower_32_bits(msg_addr), @@ -604,9 +240,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pci= e) pab_ctrl |=3D (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT); csr_writel(pcie, pab_ctrl, PAB_CTRL); =20 - csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK), - PAB_INTP_AMBA_MISC_ENB); - /* * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in * PAB_AXI_PIO_CTRL Register @@ -628,20 +261,24 @@ static int mobiveil_host_init(struct mobiveil_pcie *p= cie) */ =20 /* config outbound translation window */ - program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0, - CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res)); + program_ob_windows(pcie, WIN_NUM_0, pcie->rp.ob_io_res->start, 0, + CFG_WINDOW_TYPE, resource_size(pcie->rp.ob_io_res)); =20 /* memory inbound translation window */ program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE); =20 /* Get the I/O and memory ranges from DT */ resource_list_for_each_entry(win, &pcie->resources) { - if (resource_type(win->res) =3D=3D IORESOURCE_MEM) + if (resource_type(win->res) =3D=3D IORESOURCE_MEM) { type =3D MEM_WINDOW_TYPE; - else if (resource_type(win->res) =3D=3D IORESOURCE_IO) + } else if (resource_type(win->res) =3D=3D IORESOURCE_IO) { type =3D IO_WINDOW_TYPE; - else + } else if (resource_type(win->res) =3D=3D IORESOURCE_BUS) { + pcie->rp.root_bus_nr =3D win->res->start; + continue; + } else { continue; + } =20 /* configure outbound translation window */ program_ob_windows(pcie, pcie->ob_wins_configured, @@ -656,9 +293,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pci= e) value |=3D (PCI_CLASS_BRIDGE_PCI << 16); csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS); =20 - /* setup MSI hardware registers */ - mobiveil_pcie_enable_msi(pcie); - return 0; } =20 @@ -671,11 +305,11 @@ static void mobiveil_mask_intx_irq(struct irq_data *d= ata) =20 pcie =3D irq_desc_get_chip_data(desc); mask =3D 1 << ((data->hwirq + PAB_INTX_START) - 1); - raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags); + raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags); shifted_val =3D csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB); shifted_val &=3D ~mask; csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); - raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); + raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags); } =20 static void mobiveil_unmask_intx_irq(struct irq_data *data) @@ -687,11 +321,11 @@ static void mobiveil_unmask_intx_irq(struct irq_data = *data) =20 pcie =3D irq_desc_get_chip_data(desc); mask =3D 1 << ((data->hwirq + PAB_INTX_START) - 1); - raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags); + raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags); shifted_val =3D csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB); shifted_val |=3D mask; csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); - raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); + raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags); } =20 static struct irq_chip intx_irq_chip =3D { @@ -759,7 +393,7 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_dom= ain *domain, unsigned int nr_irqs, void *args) { struct mobiveil_pcie *pcie =3D domain->host_data; - struct mobiveil_msi *msi =3D &pcie->msi; + struct mobiveil_msi *msi =3D &pcie->rp.msi; unsigned long bit; =20 WARN_ON(nr_irqs !=3D 1); @@ -786,7 +420,7 @@ static void mobiveil_irq_msi_domain_free(struct irq_dom= ain *domain, { struct irq_data *d =3D irq_domain_get_irq_data(domain, virq); struct mobiveil_pcie *pcie =3D irq_data_get_irq_chip_data(d); - struct mobiveil_msi *msi =3D &pcie->msi; + struct mobiveil_msi *msi =3D &pcie->rp.msi; =20 mutex_lock(&msi->lock); =20 @@ -807,9 +441,9 @@ static int mobiveil_allocate_msi_domains(struct mobivei= l_pcie *pcie) { struct device *dev =3D &pcie->pdev->dev; struct fwnode_handle *fwnode =3D of_node_to_fwnode(dev->of_node); - struct mobiveil_msi *msi =3D &pcie->msi; + struct mobiveil_msi *msi =3D &pcie->rp.msi; =20 - mutex_init(&pcie->msi.lock); + mutex_init(&msi->lock); msi->dev_domain =3D irq_domain_add_linear(NULL, msi->num_of_vectors, &msi_domain_ops, pcie); if (!msi->dev_domain) { @@ -836,15 +470,15 @@ static int mobiveil_pcie_init_irq_domain(struct mobiv= eil_pcie *pcie) int ret; =20 /* setup INTx */ - pcie->intx_domain =3D irq_domain_add_linear(node, PCI_NUM_INTX, - &intx_domain_ops, pcie); + pcie->rp.intx_domain =3D irq_domain_add_linear(node, PCI_NUM_INTX, + &intx_domain_ops, pcie); =20 - if (!pcie->intx_domain) { + if (!pcie->rp.intx_domain) { dev_err(dev, "Failed to get a INTx IRQ domain\n"); return -ENOMEM; } =20 - raw_spin_lock_init(&pcie->intx_mask_lock); + raw_spin_lock_init(&pcie->rp.intx_mask_lock); =20 /* setup MSI */ ret =3D mobiveil_allocate_msi_domains(pcie); @@ -854,24 +488,58 @@ static int mobiveil_pcie_init_irq_domain(struct mobiv= eil_pcie *pcie) return 0; } =20 -static int mobiveil_pcie_probe(struct platform_device *pdev) +static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie) +{ + struct device *dev =3D &pcie->pdev->dev; + struct resource *res; + int ret; + + if (pcie->rp.ops->interrupt_init) + return pcie->rp.ops->interrupt_init(pcie); + + /* map MSI config resource */ + res =3D platform_get_resource_byname(pcie->pdev, IORESOURCE_MEM, + "apb_csr"); + pcie->apb_csr_base =3D devm_pci_remap_cfg_resource(dev, res); + if (IS_ERR(pcie->apb_csr_base)) + return PTR_ERR(pcie->apb_csr_base); + + /* setup MSI hardware registers */ + mobiveil_pcie_enable_msi(pcie); + + pcie->rp.irq =3D platform_get_irq(pcie->pdev, 0); + if (pcie->rp.irq <=3D 0) { + dev_err(dev, "failed to map IRQ: %d\n", pcie->rp.irq); + return -ENODEV; + } + + /* initialize the IRQ domains */ + ret =3D mobiveil_pcie_init_irq_domain(pcie); + if (ret) { + dev_err(dev, "Failed creating IRQ Domain\n"); + return ret; + } + + irq_set_chained_handler_and_data(pcie->rp.irq, + mobiveil_pcie_isr, pcie); + + /* Enable interrupts */ + csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK), + PAB_INTP_AMBA_MISC_ENB); + + return 0; +} + +int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) { - struct mobiveil_pcie *pcie; struct pci_bus *bus; struct pci_bus *child; struct pci_host_bridge *bridge; - struct device *dev =3D &pdev->dev; + struct device *dev =3D &pcie->pdev->dev; resource_size_t iobase; int ret; =20 - /* allocate the PCIe port */ - bridge =3D devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); - if (!bridge) - return -ENOMEM; - - pcie =3D pci_host_bridge_priv(bridge); - - pcie->pdev =3D pdev; + INIT_LIST_HEAD(&pcie->resources); =20 ret =3D mobiveil_pcie_parse_dt(pcie); if (ret) { @@ -879,7 +547,10 @@ static int mobiveil_pcie_probe(struct platform_device = *pdev) return ret; } =20 - INIT_LIST_HEAD(&pcie->resources); + /* allocate the PCIe port */ + bridge =3D devm_pci_alloc_host_bridge(dev, 0); + if (!bridge) + return -ENOMEM; =20 /* parse the host bridge base addresses from the device tree file */ ret =3D devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, @@ -899,15 +570,12 @@ static int mobiveil_pcie_probe(struct platform_device= *pdev) goto error; } =20 - /* initialize the IRQ domains */ - ret =3D mobiveil_pcie_init_irq_domain(pcie); + ret =3D mobiveil_pcie_interrupt_init(pcie); if (ret) { - dev_err(dev, "Failed creating IRQ Domain\n"); + dev_err(dev, "Interrupt init failed\n"); goto error; } =20 - irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie); - ret =3D devm_request_pci_bus_resources(dev, &pcie->resources); if (ret) goto error; @@ -916,7 +584,7 @@ static int mobiveil_pcie_probe(struct platform_device *= pdev) list_splice_init(&pcie->resources, &bridge->windows); bridge->dev.parent =3D dev; bridge->sysdata =3D pcie; - bridge->busnr =3D pcie->root_bus_nr; + bridge->busnr =3D pcie->rp.root_bus_nr; bridge->ops =3D &mobiveil_pcie_ops; bridge->map_irq =3D of_irq_parse_and_map_pci; bridge->swizzle_irq =3D pci_common_swizzle; @@ -944,25 +612,3 @@ static int mobiveil_pcie_probe(struct platform_device = *pdev) pci_free_resource_list(&pcie->resources); return ret; } - -static const struct of_device_id mobiveil_pcie_of_match[] =3D { - {.compatible =3D "mbvl,gpex40-pcie",}, - {}, -}; - -MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match); - -static struct platform_driver mobiveil_pcie_driver =3D { - .probe =3D mobiveil_pcie_probe, - .driver =3D { - .name =3D "mobiveil-pcie", - .of_match_table =3D mobiveil_pcie_of_match, - .suppress_bind_attrs =3D true, - }, -}; - -builtin_platform_driver(mobiveil_pcie_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("Mobiveil PCIe host controller driver"); -MODULE_AUTHOR("Subrahmanya Lingappa "); diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c b/drivers= /pci/controller/mobiveil/pcie-mobiveil-plat.c new file mode 100644 index 000000000000..216c62f35568 --- /dev/null +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe host controller driver for Mobiveil PCIe Host controller + * + * Copyright (c) 2018 Mobiveil Inc. + * Author: Subrahmanya Lingappa + * Refactor: Zhiqiang Hou + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "pcie-mobiveil.h" + +static int mobiveil_pcie_probe(struct platform_device *pdev) +{ + struct mobiveil_pcie *pcie; + struct device *dev =3D &pdev->dev; + + pcie =3D devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); + if (!pcie) + return -ENOMEM; + + pcie->pdev =3D pdev; + + return mobiveil_pcie_host_probe(pcie); +} + +static const struct of_device_id mobiveil_pcie_of_match[] =3D { + {.compatible =3D "mbvl,gpex40-pcie",}, + {}, +}; + +MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match); + +static struct platform_driver mobiveil_pcie_driver =3D { + .probe =3D mobiveil_pcie_probe, + .driver =3D { + .name =3D "mobiveil-pcie", + .of_match_table =3D mobiveil_pcie_of_match, + .suppress_bind_attrs =3D true, + }, +}; + +builtin_platform_driver(mobiveil_pcie_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Mobiveil PCIe host controller driver"); +MODULE_AUTHOR("Subrahmanya Lingappa "); diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/= controller/mobiveil/pcie-mobiveil.c new file mode 100644 index 000000000000..ee678a60825d --- /dev/null +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c @@ -0,0 +1,228 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe host controller driver for Mobiveil PCIe Host controller + * + * Copyright (c) 2018 Mobiveil Inc. + * Author: Subrahmanya Lingappa + * Refactor: Zhiqiang Hou + */ + +#include +#include +#include +#include +#include + +#include "pcie-mobiveil.h" + +/* + * mobiveil_pcie_sel_page - routine to access paged register + * + * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged= , + * for this scheme to work extracted higher 6 bits of the offset will be + * written to pg_sel field of PAB_CTRL register and rest of the lower 10 + * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register. + */ +static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx) +{ + u32 val; + + val =3D readl(pcie->csr_axi_slave_base + PAB_CTRL); + val &=3D ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT); + val |=3D (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT; + + writel(val, pcie->csr_axi_slave_base + PAB_CTRL); +} + +static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off) +{ + if (off < PAGED_ADDR_BNDRY) { + /* For directly accessed registers, clear the pg_sel field */ + mobiveil_pcie_sel_page(pcie, 0); + return pcie->csr_axi_slave_base + off; + } + + mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off)); + return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off); +} + +static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val) +{ + if ((uintptr_t)addr & (size - 1)) { + *val =3D 0; + return PCIBIOS_BAD_REGISTER_NUMBER; + } + + switch (size) { + case 4: + *val =3D readl(addr); + break; + case 2: + *val =3D readw(addr); + break; + case 1: + *val =3D readb(addr); + break; + default: + *val =3D 0; + return PCIBIOS_BAD_REGISTER_NUMBER; + } + + return PCIBIOS_SUCCESSFUL; +} + +static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val) +{ + if ((uintptr_t)addr & (size - 1)) + return PCIBIOS_BAD_REGISTER_NUMBER; + + switch (size) { + case 4: + writel(val, addr); + break; + case 2: + writew(val, addr); + break; + case 1: + writeb(val, addr); + break; + default: + return PCIBIOS_BAD_REGISTER_NUMBER; + } + + return PCIBIOS_SUCCESSFUL; +} + +u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size) +{ + void *addr; + u32 val; + int ret; + + addr =3D mobiveil_pcie_comp_addr(pcie, off); + + ret =3D mobiveil_pcie_read(addr, size, &val); + if (ret) + dev_err(&pcie->pdev->dev, "read CSR address failed\n"); + + return val; +} + +void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size) +{ + void *addr; + int ret; + + addr =3D mobiveil_pcie_comp_addr(pcie, off); + + ret =3D mobiveil_pcie_write(addr, size, val); + if (ret) + dev_err(&pcie->pdev->dev, "write CSR address failed\n"); +} + +bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie) +{ + if (pcie->ops->link_up) + return pcie->ops->link_up(pcie); + + return (csr_readl(pcie, LTSSM_STATUS) & + LTSSM_STATUS_L0_MASK) =3D=3D LTSSM_STATUS_L0; +} + +void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_a= ddr, + u64 pci_addr, u32 type, u64 size) +{ + u32 value; + u64 size64 =3D ~(size - 1); + + if (win_num >=3D pcie->ppio_wins) { + dev_err(&pcie->pdev->dev, + "ERROR: max inbound windows reached !\n"); + return; + } + + value =3D csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); + value &=3D ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | + WIN_SIZE_MASK << WIN_SIZE_SHIFT); + value |=3D (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) | + (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT); + csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num)); + + csr_writel(pcie, upper_32_bits(size64), + PAB_EXT_PEX_AMAP_SIZEN(win_num)); + + csr_writel(pcie, lower_32_bits(cpu_addr), + PAB_PEX_AMAP_AXI_WIN(win_num)); + csr_writel(pcie, upper_32_bits(cpu_addr), + PAB_EXT_PEX_AMAP_AXI_WIN(win_num)); + + csr_writel(pcie, lower_32_bits(pci_addr), + PAB_PEX_AMAP_PEX_WIN_L(win_num)); + csr_writel(pcie, upper_32_bits(pci_addr), + PAB_PEX_AMAP_PEX_WIN_H(win_num)); + + pcie->ib_wins_configured++; +} + +/* + * routine to program the outbound windows + */ +void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_a= ddr, + u64 pci_addr, u32 type, u64 size) +{ + + u32 value; + u64 size64 =3D ~(size - 1); + + if (win_num >=3D pcie->apio_wins) { + dev_err(&pcie->pdev->dev, + "ERROR: max outbound windows reached !\n"); + return; + } + + /* + * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit + * to 4 KB in PAB_AXI_AMAP_CTRL register + */ + value =3D csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num)); + value &=3D ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | + WIN_SIZE_MASK << WIN_SIZE_SHIFT); + value |=3D 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT | + (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT); + csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num)); + + csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num)); + + /* + * program AXI window base with appropriate value in + * PAB_AXI_AMAP_AXI_WIN0 register + */ + csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK), + PAB_AXI_AMAP_AXI_WIN(win_num)); + csr_writel(pcie, upper_32_bits(cpu_addr), + PAB_EXT_AXI_AMAP_AXI_WIN(win_num)); + + csr_writel(pcie, lower_32_bits(pci_addr), + PAB_AXI_AMAP_PEX_WIN_L(win_num)); + csr_writel(pcie, upper_32_bits(pci_addr), + PAB_AXI_AMAP_PEX_WIN_H(win_num)); + + pcie->ob_wins_configured++; +} + +int mobiveil_bringup_link(struct mobiveil_pcie *pcie) +{ + int retries; + + /* check if the link is up or not */ + for (retries =3D 0; retries < LINK_WAIT_MAX_RETRIES; retries++) { + if (mobiveil_pcie_link_up(pcie)) + return 0; + + usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX); + } + + dev_err(&pcie->pdev->dev, "link never came up\n"); + + return -ETIMEDOUT; +} diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/= controller/mobiveil/pcie-mobiveil.h new file mode 100644 index 000000000000..eb4cb61291a8 --- /dev/null +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h @@ -0,0 +1,187 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * PCIe host controller driver for Mobiveil PCIe Host controller + * + * Copyright (c) 2018 Mobiveil Inc. + * Author: Subrahmanya Lingappa + * Refactor: Zhiqiang Hou + */ + +#ifndef _PCIE_MOBIVEIL_H +#define _PCIE_MOBIVEIL_H + +#include +#include +#include +#include "../../pci.h" + +/* register offsets and bit positions */ + +/* + * translation tables are grouped into windows, each window registers are + * grouped into blocks of 4 or 16 registers each + */ +#define PAB_REG_BLOCK_SIZE 16 +#define PAB_EXT_REG_BLOCK_SIZE 4 + +#define PAB_REG_ADDR(offset, win) \ + (offset + (win * PAB_REG_BLOCK_SIZE)) +#define PAB_EXT_REG_ADDR(offset, win) \ + (offset + (win * PAB_EXT_REG_BLOCK_SIZE)) + +#define LTSSM_STATUS 0x0404 +#define LTSSM_STATUS_L0_MASK 0x3f +#define LTSSM_STATUS_L0 0x2d + +#define PAB_CTRL 0x0808 +#define AMBA_PIO_ENABLE_SHIFT 0 +#define PEX_PIO_ENABLE_SHIFT 1 +#define PAGE_SEL_SHIFT 13 +#define PAGE_SEL_MASK 0x3f +#define PAGE_LO_MASK 0x3ff +#define PAGE_SEL_OFFSET_SHIFT 10 + +#define PAB_AXI_PIO_CTRL 0x0840 +#define APIO_EN_MASK 0xf + +#define PAB_PEX_PIO_CTRL 0x08c0 +#define PIO_ENABLE_SHIFT 0 + +#define PAB_INTP_AMBA_MISC_ENB 0x0b0c +#define PAB_INTP_AMBA_MISC_STAT 0x0b1c +#define PAB_INTP_INTX_MASK 0x01e0 +#define PAB_INTP_MSI_MASK 0x8 + +#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) +#define WIN_ENABLE_SHIFT 0 +#define WIN_TYPE_SHIFT 1 +#define WIN_TYPE_MASK 0x3 +#define WIN_SIZE_SHIFT 10 +#define WIN_SIZE_MASK 0x3fffff + +#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win) + +#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win) +#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win) +#define AXI_WINDOW_ALIGN_MASK 3 + +#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win) +#define PAB_BUS_SHIFT 24 +#define PAB_DEVICE_SHIFT 19 +#define PAB_FUNCTION_SHIFT 16 + +#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win) +#define PAB_INTP_AXI_PIO_CLASS 0x474 + +#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) +#define AMAP_CTRL_EN_SHIFT 0 +#define AMAP_CTRL_TYPE_SHIFT 1 +#define AMAP_CTRL_TYPE_MASK 3 + +#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win) +#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win) +#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win) +#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win) +#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win) + +/* starting offset of INTX bits in status register */ +#define PAB_INTX_START 5 + +/* supported number of MSI interrupts */ +#define PCI_NUM_MSI 16 + +/* MSI registers */ +#define MSI_BASE_LO_OFFSET 0x04 +#define MSI_BASE_HI_OFFSET 0x08 +#define MSI_SIZE_OFFSET 0x0c +#define MSI_ENABLE_OFFSET 0x14 +#define MSI_STATUS_OFFSET 0x18 +#define MSI_DATA_OFFSET 0x20 +#define MSI_ADDR_L_OFFSET 0x24 +#define MSI_ADDR_H_OFFSET 0x28 + +/* outbound and inbound window definitions */ +#define WIN_NUM_0 0 +#define WIN_NUM_1 1 +#define CFG_WINDOW_TYPE 0 +#define IO_WINDOW_TYPE 1 +#define MEM_WINDOW_TYPE 2 +#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) +#define MAX_PIO_WINDOWS 8 + +/* Parameters for the waiting for link up routine */ +#define LINK_WAIT_MAX_RETRIES 10 +#define LINK_WAIT_MIN 90000 +#define LINK_WAIT_MAX 100000 + +#define PAGED_ADDR_BNDRY 0xc00 +#define OFFSET_TO_PAGE_ADDR(off) \ + ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY) +#define OFFSET_TO_PAGE_IDX(off) \ + ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK) + +struct mobiveil_pcie; + +struct mobiveil_msi { /* MSI information */ + struct mutex lock; /* protect bitmap variable */ + struct irq_domain *msi_domain; + struct irq_domain *dev_domain; + phys_addr_t msi_pages_phys; + int num_of_vectors; + DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI); +}; + +struct mobiveil_rp_ops { + int (*interrupt_init)(struct mobiveil_pcie *pcie); +}; + +struct root_port { + u8 root_bus_nr; + void __iomem *config_axi_slave_base; /* endpoint config base */ + struct resource *ob_io_res; + struct mobiveil_rp_ops *ops; + int irq; + raw_spinlock_t intx_mask_lock; + struct irq_domain *intx_domain; + struct mobiveil_msi msi; +}; + +struct mobiveil_pab_ops { + int (*link_up)(struct mobiveil_pcie *pcie); +}; + +struct mobiveil_pcie { + struct platform_device *pdev; + struct list_head resources; + void __iomem *csr_axi_slave_base; /* PAB registers base */ + phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */ + void __iomem *apb_csr_base; /* MSI register base */ + u32 apio_wins; + u32 ppio_wins; + u32 ob_wins_configured; /* configured outbound windows */ + u32 ib_wins_configured; /* configured inbound windows */ + const struct mobiveil_pab_ops *ops; + struct root_port rp; +}; + +int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie); +bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie); +int mobiveil_bringup_link(struct mobiveil_pcie *pcie); +void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_a= ddr, + u64 pci_addr, u32 type, u64 size); +void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_a= ddr, + u64 pci_addr, u32 type, u64 size); +u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size); +void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size); + +static inline u32 csr_readl(struct mobiveil_pcie *pcie, u32 off) +{ + return csr_read(pcie, off, 0x4); +} + +static inline void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off= ) +{ + csr_write(pcie, val, off, 0x4); +} + +#endif /* _PCIE_MOBIVEIL_H */ --=20 2.17.1