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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/include/linux/pci-epc.h

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PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate Add SPDX GPL-2.0 to all PCI files that specified the GPL version 2 license. Remove the boilerplate GPL version 2 language, relying on the assertion in b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license") that the SPDX identifier may be used instead of the full boilerplate text. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-26 21:50:27 +03:00
/* SPDX-License-Identifier: GPL-2.0 */
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
/**
* PCI Endpoint *Controller* (EPC) header file
*
* Copyright (C) 2017 Texas Instruments
* Author: Kishon Vijay Abraham I <kishon@ti.com>
*/
#ifndef __LINUX_PCI_EPC_H
#define __LINUX_PCI_EPC_H
#include <linux/pci-epf.h>
struct pci_epc;
enum pci_epc_irq_type {
PCI_EPC_IRQ_UNKNOWN,
PCI_EPC_IRQ_LEGACY,
PCI_EPC_IRQ_MSI,
PCI: endpoint: Add MSI-X interfaces Add PCI_EPC_IRQ_MSIX type. Add MSI-X callbacks signatures to the ops structure. Add sysfs interface for set/get MSI-X capability maximum number. Update documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:12 +03:00
PCI_EPC_IRQ_MSIX,
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
};
/**
* struct pci_epc_ops - set of function pointers for performing EPC operations
* @write_header: ops to populate configuration space header
* @set_bar: ops to configure the BAR
* @clear_bar: ops to reset the BAR
* @map_addr: ops to map CPU address to PCI address
* @unmap_addr: ops to unmap CPU address and PCI address
* @set_msi: ops to set the requested number of MSI interrupts in the MSI
* capability register
* @get_msi: ops to get the number of MSI interrupts allocated by the RC from
* the MSI capability register
PCI: endpoint: Add MSI-X interfaces Add PCI_EPC_IRQ_MSIX type. Add MSI-X callbacks signatures to the ops structure. Add sysfs interface for set/get MSI-X capability maximum number. Update documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:12 +03:00
* @set_msix: ops to set the requested number of MSI-X interrupts in the
* MSI-X capability register
* @get_msix: ops to get the number of MSI-X interrupts allocated by the RC
* from the MSI-X capability register
PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures Change {cdns, dra7xx, artpec6, dw, rockchip}_pcie_ep_raise_irq() and pci_epc_raise_irq() signature, namely the interrupt_num variable type from u8 to u16 to accommodate 2048 maximum MSI-X interrupts. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Alan Douglas <adouglas@cadence.com> Acked-by: Shawn Lin <shawn.lin@rock-chips.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:13 +03:00
* @raise_irq: ops to raise a legacy, MSI or MSI-X interrupt
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
* @start: ops to start the PCI link
* @stop: ops to stop the PCI link
* @owner: the module owner containing the ops
*/
struct pci_epc_ops {
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int (*write_header)(struct pci_epc *epc, u8 func_no,
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
struct pci_epf_header *hdr);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int (*set_bar)(struct pci_epc *epc, u8 func_no,
PCI: endpoint: Simplify epc->ops->set_bar()/pci_epc_set_bar() Add barno and flags to struct epf_bar. That way we can simplify epc->ops->set_bar()/pci_epc_set_bar() by passing a struct *epf_bar instead of a whole lot of arguments. This is needed so that epc->ops->set_bar() implementations can modify BAR flags. Will be utilized in a succeeding patch. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-03-28 14:50:07 +03:00
struct pci_epf_bar *epf_bar);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
void (*clear_bar)(struct pci_epc *epc, u8 func_no,
PCI: endpoint: Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar. This is needed so that epc->ops->clear_bar() can clear the BAR pair, if the BAR is 64-bits wide. This also makes it possible for pci_epc_clear_bar() to sanity check the flags. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
2018-03-28 14:50:14 +03:00
struct pci_epf_bar *epf_bar);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int (*map_addr)(struct pci_epc *epc, u8 func_no,
phys_addr_t addr, u64 pci_addr, size_t size);
void (*unmap_addr)(struct pci_epc *epc, u8 func_no,
phys_addr_t addr);
int (*set_msi)(struct pci_epc *epc, u8 func_no, u8 interrupts);
int (*get_msi)(struct pci_epc *epc, u8 func_no);
PCI: endpoint: Add MSI-X interfaces Add PCI_EPC_IRQ_MSIX type. Add MSI-X callbacks signatures to the ops structure. Add sysfs interface for set/get MSI-X capability maximum number. Update documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:12 +03:00
int (*set_msix)(struct pci_epc *epc, u8 func_no, u16 interrupts);
int (*get_msix)(struct pci_epc *epc, u8 func_no);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int (*raise_irq)(struct pci_epc *epc, u8 func_no,
PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures Change {cdns, dra7xx, artpec6, dw, rockchip}_pcie_ep_raise_irq() and pci_epc_raise_irq() signature, namely the interrupt_num variable type from u8 to u16 to accommodate 2048 maximum MSI-X interrupts. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Alan Douglas <adouglas@cadence.com> Acked-by: Shawn Lin <shawn.lin@rock-chips.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:13 +03:00
enum pci_epc_irq_type type, u16 interrupt_num);
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
int (*start)(struct pci_epc *epc);
void (*stop)(struct pci_epc *epc);
PCI: endpoint: Add new pci_epc_ops to get EPC features Add a new pci_epc_ops ->get_features() to get the features supported by the EPC. Since EPC can provide different features to different functions, the ->get_features() ops takes _func_no_ as an argument. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:14:59 +03:00
const struct pci_epc_features* (*get_features)(struct pci_epc *epc,
u8 func_no);
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
struct module *owner;
};
/**
* struct pci_epc_mem - address space of the endpoint controller
* @phys_base: physical base address of the PCI address space
* @size: the size of the PCI address space
* @bitmap: bitmap to manage the PCI address space
* @pages: number of bits representing the address region
PCI: endpoint: Add support for configurable page size pci-epc-mem uses a page size equal to *PAGE_SIZE* (usually 4KB) to manage the address space. However certain platforms like TI's K2G have a restriction that this address space should be either divided into 1MB/2MB/4MB or 8MB sizes (Ref: 11.14.4.9.1 Outbound Address Translation in K2G TRM SPRUHY8F January 2016 – Revised May 2017). Add support to handle different page sizes here. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-08-18 17:57:56 +03:00
* @page_size: size of each page
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
*/
struct pci_epc_mem {
phys_addr_t phys_base;
size_t size;
unsigned long *bitmap;
PCI: endpoint: Add support for configurable page size pci-epc-mem uses a page size equal to *PAGE_SIZE* (usually 4KB) to manage the address space. However certain platforms like TI's K2G have a restriction that this address space should be either divided into 1MB/2MB/4MB or 8MB sizes (Ref: 11.14.4.9.1 Outbound Address Translation in K2G TRM SPRUHY8F January 2016 – Revised May 2017). Add support to handle different page sizes here. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-08-18 17:57:56 +03:00
size_t page_size;
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
int pages;
};
/**
* struct pci_epc - represents the PCI EPC device
* @dev: PCI EPC device
* @pci_epf: list of endpoint functions present in this EPC device
* @ops: function pointers for performing endpoint operations
* @mem: address space of the endpoint controller
* @max_functions: max number of functions that can be configured in this EPC
PCI: endpoint: Create configfs entry for EPC device and EPF driver Invoke APIs provided by pci-ep-cfs to create configfs entry for every EPC device and EPF driver to help users in creating EPF device and binding the EPF device to the EPC device. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-03-27 12:45:01 +03:00
* @group: configfs group representing the PCI EPC device
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
* @lock: spinlock to protect pci_epc ops
PCI: endpoint: Use notification chain mechanism to notify EPC events to EPF Use atomic_notifier_call_chain() to notify EPC events like linkup to EPF driver instead of using linkup ops in EPF driver. This is in preparation for adding proper locking mechanism to EPF ops. This will also enable to add more events (in addition to linkup) in the future. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Vidya Sagar <vidyas@nvidia.com>
2020-02-24 12:53:34 +03:00
* @notifier: used to notify EPF of any EPC events (like linkup)
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
*/
struct pci_epc {
struct device dev;
struct list_head pci_epf;
const struct pci_epc_ops *ops;
struct pci_epc_mem *mem;
u8 max_functions;
PCI: endpoint: Create configfs entry for EPC device and EPF driver Invoke APIs provided by pci-ep-cfs to create configfs entry for every EPC device and EPF driver to help users in creating EPF device and binding the EPF device to the EPC device. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-03-27 12:45:01 +03:00
struct config_group *group;
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
/* spinlock to protect against concurrent access of EP controller */
spinlock_t lock;
PCI: endpoint: Use notification chain mechanism to notify EPC events to EPF Use atomic_notifier_call_chain() to notify EPC events like linkup to EPF driver instead of using linkup ops in EPF driver. This is in preparation for adding proper locking mechanism to EPF ops. This will also enable to add more events (in addition to linkup) in the future. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Vidya Sagar <vidyas@nvidia.com>
2020-02-24 12:53:34 +03:00
struct atomic_notifier_head notifier;
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
};
PCI: endpoint: Add new pci_epc_ops to get EPC features Add a new pci_epc_ops ->get_features() to get the features supported by the EPC. Since EPC can provide different features to different functions, the ->get_features() ops takes _func_no_ as an argument. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:14:59 +03:00
/**
* struct pci_epc_features - features supported by a EPC device per function
* @linkup_notifier: indicate if the EPC device can notify EPF driver on link up
* @msi_capable: indicate if the endpoint function has MSI capability
* @msix_capable: indicate if the endpoint function has MSI-X capability
* @reserved_bar: bitmap to indicate reserved BAR unavailable to function driver
* @bar_fixed_64bit: bitmap to indicate fixed 64bit BARs
* @bar_fixed_size: Array specifying the size supported by each BAR
PCI: endpoint: Add support to specify alignment for buffers allocated to BARs The address that is allocated using pci_epf_alloc_space() is directly written to the target address of the Inbound Address Translation unit (ie the HW component implementing inbound address decoding) on endpoint controllers. Designware IP [1] has a configuration parameter (CX_ATU_MIN_REGION_SIZE [2]) which has 64KB as default value and the lower 16 bits of the Base, Limit and Target registers of the Inbound ATU are fixed to zero. If the programmed memory address is not aligned to 64 KB boundary this causes memory corruption. Modify pci_epf_alloc_space() API to take alignment size as argument in order to allocate buffers to be mapped to BARs with an alignment that suits the platform where they are used. Add an 'align' parameter to epc_features which can be used by platform drivers to specify the BAR allocation alignment requirements and use this while invoking pci_epf_alloc_space(). [1] "I/O and MEM Match Modes" section in DesignWare Cores PCI Express Controller Databook version 4.90a [2] http://www.ti.com/lit/ug/spruid7c/spruid7c.pdf Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-03-25 12:39:39 +03:00
* @align: alignment size required for BAR buffer allocation
PCI: endpoint: Add new pci_epc_ops to get EPC features Add a new pci_epc_ops ->get_features() to get the features supported by the EPC. Since EPC can provide different features to different functions, the ->get_features() ops takes _func_no_ as an argument. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:14:59 +03:00
*/
struct pci_epc_features {
unsigned int linkup_notifier : 1;
unsigned int msi_capable : 1;
unsigned int msix_capable : 1;
u8 reserved_bar;
u8 bar_fixed_64bit;
PCI: Add PCI_STD_NUM_BARS for the number of standard BARs Code that iterates over all standard PCI BARs typically uses PCI_STD_RESOURCE_END. However, that requires the unusual test "i <= PCI_STD_RESOURCE_END" rather than something the typical "i < PCI_STD_NUM_BARS". Add a definition for PCI_STD_NUM_BARS and change loops to use the more idiomatic C style to help avoid fencepost errors. Link: https://lore.kernel.org/r/20190927234026.23342-1-efremov@linux.com Link: https://lore.kernel.org/r/20190927234308.23935-1-efremov@linux.com Link: https://lore.kernel.org/r/20190916204158.6889-3-efremov@linux.com Signed-off-by: Denis Efremov <efremov@linux.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Sebastian Ott <sebott@linux.ibm.com> # arch/s390/ Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> # video/fbdev/ Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> # pci/controller/dwc/ Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com> # scsi/pm8001/ Acked-by: Martin K. Petersen <martin.petersen@oracle.com> # scsi/pm8001/ Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # memstick/
2019-09-28 02:43:08 +03:00
u64 bar_fixed_size[PCI_STD_NUM_BARS];
PCI: endpoint: Add support to specify alignment for buffers allocated to BARs The address that is allocated using pci_epf_alloc_space() is directly written to the target address of the Inbound Address Translation unit (ie the HW component implementing inbound address decoding) on endpoint controllers. Designware IP [1] has a configuration parameter (CX_ATU_MIN_REGION_SIZE [2]) which has 64KB as default value and the lower 16 bits of the Base, Limit and Target registers of the Inbound ATU are fixed to zero. If the programmed memory address is not aligned to 64 KB boundary this causes memory corruption. Modify pci_epf_alloc_space() API to take alignment size as argument in order to allocate buffers to be mapped to BARs with an alignment that suits the platform where they are used. Add an 'align' parameter to epc_features which can be used by platform drivers to specify the BAR allocation alignment requirements and use this while invoking pci_epf_alloc_space(). [1] "I/O and MEM Match Modes" section in DesignWare Cores PCI Express Controller Databook version 4.90a [2] http://www.ti.com/lit/ug/spruid7c/spruid7c.pdf Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-03-25 12:39:39 +03:00
size_t align;
PCI: endpoint: Add new pci_epc_ops to get EPC features Add a new pci_epc_ops ->get_features() to get the features supported by the EPC. Since EPC can provide different features to different functions, the ->get_features() ops takes _func_no_ as an argument. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:14:59 +03:00
};
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
#define to_pci_epc(device) container_of((device), struct pci_epc, dev)
#define pci_epc_create(dev, ops) \
__pci_epc_create((dev), (ops), THIS_MODULE)
#define devm_pci_epc_create(dev, ops) \
__devm_pci_epc_create((dev), (ops), THIS_MODULE)
PCI: endpoint: Add support for configurable page size pci-epc-mem uses a page size equal to *PAGE_SIZE* (usually 4KB) to manage the address space. However certain platforms like TI's K2G have a restriction that this address space should be either divided into 1MB/2MB/4MB or 8MB sizes (Ref: 11.14.4.9.1 Outbound Address Translation in K2G TRM SPRUHY8F January 2016 – Revised May 2017). Add support to handle different page sizes here. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-08-18 17:57:56 +03:00
#define pci_epc_mem_init(epc, phys_addr, size) \
__pci_epc_mem_init((epc), (phys_addr), (size), PAGE_SIZE)
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
static inline void epc_set_drvdata(struct pci_epc *epc, void *data)
{
dev_set_drvdata(&epc->dev, data);
}
static inline void *epc_get_drvdata(struct pci_epc *epc)
{
return dev_get_drvdata(&epc->dev);
}
PCI: endpoint: Use notification chain mechanism to notify EPC events to EPF Use atomic_notifier_call_chain() to notify EPC events like linkup to EPF driver instead of using linkup ops in EPF driver. This is in preparation for adding proper locking mechanism to EPF ops. This will also enable to add more events (in addition to linkup) in the future. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Vidya Sagar <vidyas@nvidia.com>
2020-02-24 12:53:34 +03:00
static inline int
pci_epc_register_notifier(struct pci_epc *epc, struct notifier_block *nb)
{
return atomic_notifier_chain_register(&epc->notifier, nb);
}
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
struct pci_epc *
__devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
struct module *owner);
struct pci_epc *
__pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
struct module *owner);
void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc);
void pci_epc_destroy(struct pci_epc *epc);
int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
void pci_epc_linkup(struct pci_epc *epc);
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
PCI: endpoint: Simplify epc->ops->set_bar()/pci_epc_set_bar() Add barno and flags to struct epf_bar. That way we can simplify epc->ops->set_bar()/pci_epc_set_bar() by passing a struct *epf_bar instead of a whole lot of arguments. This is needed so that epc->ops->set_bar() implementations can modify BAR flags. Will be utilized in a succeeding patch. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-03-28 14:50:07 +03:00
struct pci_epf_bar *epf_bar);
PCI: endpoint: Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar. This is needed so that epc->ops->clear_bar() can clear the BAR pair, if the BAR is 64-bits wide. This also makes it possible for pci_epc_clear_bar() to sanity check the flags. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
2018-03-28 14:50:14 +03:00
void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr,
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
u64 pci_addr, size_t size);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr);
int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts);
int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
PCI: endpoint: Add MSI-X interfaces Add PCI_EPC_IRQ_MSIX type. Add MSI-X callbacks signatures to the ops structure. Add sysfs interface for set/get MSI-X capability maximum number. Update documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:12 +03:00
int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts);
int pci_epc_get_msix(struct pci_epc *epc, u8 func_no);
PCI: endpoint: Add the function number as argument to EPC ops This patch updates the prototype of most handlers from 'struct pci_epc_ops' so the EPC library can now support multi-function devices. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2018-01-30 23:56:56 +03:00
int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures Change {cdns, dra7xx, artpec6, dw, rockchip}_pcie_ep_raise_irq() and pci_epc_raise_irq() signature, namely the interrupt_num variable type from u8 to u16 to accommodate 2048 maximum MSI-X interrupts. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Alan Douglas <adouglas@cadence.com> Acked-by: Shawn Lin <shawn.lin@rock-chips.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-07-19 11:32:13 +03:00
enum pci_epc_irq_type type, u16 interrupt_num);
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
int pci_epc_start(struct pci_epc *epc);
void pci_epc_stop(struct pci_epc *epc);
PCI: endpoint: Add new pci_epc_ops to get EPC features Add a new pci_epc_ops ->get_features() to get the features supported by the EPC. Since EPC can provide different features to different functions, the ->get_features() ops takes _func_no_ as an argument. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:14:59 +03:00
const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
u8 func_no);
PCI: endpoint: Add helper to get first unreserved BAR Add a helper function pci_epc_get_first_free_bar() to get the first unreserved BAR that can be used for endpoint function. Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2019-01-14 14:15:05 +03:00
unsigned int pci_epc_get_first_free_bar(const struct pci_epc_features
*epc_features);
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
struct pci_epc *pci_epc_get(const char *epc_name);
void pci_epc_put(struct pci_epc *epc);
PCI: endpoint: Add support for configurable page size pci-epc-mem uses a page size equal to *PAGE_SIZE* (usually 4KB) to manage the address space. However certain platforms like TI's K2G have a restriction that this address space should be either divided into 1MB/2MB/4MB or 8MB sizes (Ref: 11.14.4.9.1 Outbound Address Translation in K2G TRM SPRUHY8F January 2016 – Revised May 2017). Add support to handle different page sizes here. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-08-18 17:57:56 +03:00
int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size,
size_t page_size);
PCI: endpoint: Add EP core layer to enable EP controller and EP functions Introduce a new EP core layer in order to support endpoint functions in linux kernel. This comprises the EPC library (Endpoint Controller Library) and EPF library (Endpoint Function Library). EPC library implements functions specific to an endpoint controller and EPF library implements functions specific to an endpoint function. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-10 16:55:10 +03:00
void pci_epc_mem_exit(struct pci_epc *epc);
void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
phys_addr_t *phys_addr, size_t size);
void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
void __iomem *virt_addr, size_t size);
#endif /* __LINUX_PCI_EPC_H */