mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
bc4b024a8b
For a long time all architectures implement the pci_dma_* functions using the generic DMA API, and they all use the same header to do so. Move this header, pci-dma-compat.h, to include/linux and include it from the generic pci.h instead of having each arch duplicate this include. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
230 lines
6.6 KiB
C
230 lines
6.6 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef _ASM_TILE_PCI_H
|
|
#define _ASM_TILE_PCI_H
|
|
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/pci.h>
|
|
#include <asm-generic/pci_iomap.h>
|
|
|
|
#ifndef __tilegx__
|
|
|
|
/*
|
|
* Structure of a PCI controller (host bridge)
|
|
*/
|
|
struct pci_controller {
|
|
int index; /* PCI domain number */
|
|
struct pci_bus *root_bus;
|
|
|
|
int last_busno;
|
|
|
|
int hv_cfg_fd[2]; /* config{0,1} fds for this PCIe controller */
|
|
int hv_mem_fd; /* fd to Hypervisor for MMIO operations */
|
|
|
|
struct pci_ops *ops;
|
|
|
|
int irq_base; /* Base IRQ from the Hypervisor */
|
|
int plx_gen1; /* flag for PLX Gen 1 configuration */
|
|
|
|
/* Address ranges that are routed to this controller/bridge. */
|
|
struct resource mem_resources[3];
|
|
};
|
|
|
|
/*
|
|
* This flag tells if the platform is TILEmpower that needs
|
|
* special configuration for the PLX switch chip.
|
|
*/
|
|
extern int tile_plx_gen1;
|
|
|
|
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {}
|
|
|
|
#define TILE_NUM_PCIE 2
|
|
|
|
/*
|
|
* The hypervisor maps the entirety of CPA-space as bus addresses, so
|
|
* bus addresses are physical addresses. The networking and block
|
|
* device layers use this boolean for bounce buffer decisions.
|
|
*/
|
|
#define PCI_DMA_BUS_IS_PHYS 1
|
|
|
|
/* generic pci stuff */
|
|
#include <asm-generic/pci.h>
|
|
|
|
#else
|
|
|
|
#include <asm/page.h>
|
|
#include <gxio/trio.h>
|
|
|
|
/**
|
|
* We reserve the hugepage-size address range at the top of the 64-bit address
|
|
* space to serve as the PCI window, emulating the BAR0 space of an endpoint
|
|
* device. This window is used by the chip-to-chip applications running on
|
|
* the RC node. The reason for carving out this window is that Mem-Maps that
|
|
* back up this window will not overlap with those that map the real physical
|
|
* memory.
|
|
*/
|
|
#define PCIE_HOST_BAR0_SIZE HPAGE_SIZE
|
|
#define PCIE_HOST_BAR0_START HPAGE_MASK
|
|
|
|
/**
|
|
* The first PAGE_SIZE of the above "BAR" window is mapped to the
|
|
* gxpci_host_regs structure.
|
|
*/
|
|
#define PCIE_HOST_REGS_SIZE PAGE_SIZE
|
|
|
|
/*
|
|
* This is the PCI address where the Mem-Map interrupt regions start.
|
|
* We use the 2nd to the last huge page of the 64-bit address space.
|
|
* The last huge page is used for the rootcomplex "bar", for C2C purpose.
|
|
*/
|
|
#define MEM_MAP_INTR_REGIONS_BASE (HPAGE_MASK - HPAGE_SIZE)
|
|
|
|
/*
|
|
* Each Mem-Map interrupt region occupies 4KB.
|
|
*/
|
|
#define MEM_MAP_INTR_REGION_SIZE (1 << TRIO_MAP_MEM_LIM__ADDR_SHIFT)
|
|
|
|
/*
|
|
* Allocate the PCI BAR window right below 4GB.
|
|
*/
|
|
#define TILE_PCI_BAR_WINDOW_TOP (1ULL << 32)
|
|
|
|
/*
|
|
* Allocate 1GB for the PCI BAR window.
|
|
*/
|
|
#define TILE_PCI_BAR_WINDOW_SIZE (1 << 30)
|
|
|
|
/*
|
|
* This is the highest bus address targeting the host memory that
|
|
* can be generated by legacy PCI devices with 32-bit or less
|
|
* DMA capability, dictated by the BAR window size and location.
|
|
*/
|
|
#define TILE_PCI_MAX_DIRECT_DMA_ADDRESS \
|
|
(TILE_PCI_BAR_WINDOW_TOP - TILE_PCI_BAR_WINDOW_SIZE - 1)
|
|
|
|
/*
|
|
* We shift the PCI bus range for all the physical memory up by the whole PA
|
|
* range. The corresponding CPA of an incoming PCI request will be the PCI
|
|
* address minus TILE_PCI_MEM_MAP_BASE_OFFSET. This also implies
|
|
* that the 64-bit capable devices will be given DMA addresses as
|
|
* the CPA plus TILE_PCI_MEM_MAP_BASE_OFFSET. To support 32-bit
|
|
* devices, we create a separate map region that handles the low
|
|
* 4GB.
|
|
*
|
|
* This design lets us avoid the "PCI hole" problem where the host bridge
|
|
* won't pass DMA traffic with target addresses that happen to fall within the
|
|
* BAR space. This enables us to use all the physical memory for DMA, instead
|
|
* of wasting the same amount of physical memory as the BAR window size.
|
|
*/
|
|
#define TILE_PCI_MEM_MAP_BASE_OFFSET (1ULL << CHIP_PA_WIDTH())
|
|
|
|
/*
|
|
* Start of the PCI memory resource, which starts at the end of the
|
|
* maximum system physical RAM address.
|
|
*/
|
|
#define TILE_PCI_MEM_START (1ULL << CHIP_PA_WIDTH())
|
|
|
|
/*
|
|
* Structure of a PCI controller (host bridge) on Gx.
|
|
*/
|
|
struct pci_controller {
|
|
|
|
/* Pointer back to the TRIO that this PCIe port is connected to. */
|
|
gxio_trio_context_t *trio;
|
|
int mac; /* PCIe mac index on the TRIO shim */
|
|
int trio_index; /* Index of TRIO shim that contains the MAC. */
|
|
|
|
int pio_mem_index; /* PIO region index for memory access */
|
|
|
|
#ifdef CONFIG_TILE_PCI_IO
|
|
int pio_io_index; /* PIO region index for I/O space access */
|
|
#endif
|
|
|
|
/*
|
|
* Mem-Map regions for all the memory controllers so that Linux can
|
|
* map all of its physical memory space to the PCI bus.
|
|
*/
|
|
int mem_maps[MAX_NUMNODES];
|
|
|
|
int index; /* PCI domain number */
|
|
struct pci_bus *root_bus;
|
|
|
|
/* PCI I/O space resource for this controller. */
|
|
struct resource io_space;
|
|
char io_space_name[32];
|
|
|
|
/* PCI memory space resource for this controller. */
|
|
struct resource mem_space;
|
|
char mem_space_name[32];
|
|
|
|
uint64_t mem_offset; /* cpu->bus memory mapping offset. */
|
|
|
|
int first_busno;
|
|
|
|
struct pci_ops *ops;
|
|
|
|
/* Table that maps the INTx numbers to Linux irq numbers. */
|
|
int irq_intx_table[4];
|
|
};
|
|
|
|
extern struct pci_controller pci_controllers[TILEGX_NUM_TRIO * TILEGX_TRIO_PCIES];
|
|
extern gxio_trio_context_t trio_contexts[TILEGX_NUM_TRIO];
|
|
extern int num_trio_shims;
|
|
|
|
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
|
|
|
|
/*
|
|
* The PCI address space does not equal the physical memory address
|
|
* space (we have an IOMMU). The IDE and SCSI device layers use this
|
|
* boolean for bounce buffer decisions.
|
|
*/
|
|
#define PCI_DMA_BUS_IS_PHYS 0
|
|
|
|
#endif /* __tilegx__ */
|
|
|
|
int __init tile_pci_init(void);
|
|
int __init pcibios_init(void);
|
|
|
|
void pcibios_fixup_bus(struct pci_bus *bus);
|
|
|
|
#define pci_domain_nr(bus) (((struct pci_controller *)(bus)->sysdata)->index)
|
|
|
|
/*
|
|
* This decides whether to display the domain number in /proc.
|
|
*/
|
|
static inline int pci_proc_domain(struct pci_bus *bus)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* pcibios_assign_all_busses() tells whether or not the bus numbers
|
|
* should be reassigned, in case the BIOS didn't do it correctly, or
|
|
* in case we don't have a BIOS and we want to let Linux do it.
|
|
*/
|
|
static inline int pcibios_assign_all_busses(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#define PCIBIOS_MIN_MEM 0
|
|
/* Minimum PCI I/O address, starting at the page boundary. */
|
|
#define PCIBIOS_MIN_IO PAGE_SIZE
|
|
|
|
/* Use any cpu for PCI. */
|
|
#define cpumask_of_pcibus(bus) cpu_online_mask
|
|
|
|
#endif /* _ASM_TILE_PCI_H */
|