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u-boot/include/pci.h
Michal Suchanek 1fcfadcb82 dm: pci: Fix doc typo first -> next 
pci_find_first_device description says it can be used for iteration with
itself but it should really be with pci_find_next_device

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
2022-10-29 07:36:33 -06:00

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Copyright (c) 2021 Maciej W. Rozycki <macro@orcam.me.uk>
*/
#ifndef _PCI_H
#define _PCI_H
#define PCI_CFG_SPACE_SIZE 256
#define PCI_CFG_SPACE_EXP_SIZE 4096
/*
* Under PCI, each device has 256 bytes of configuration address space,
* of which the first 64 bytes are standardized as follows:
*/
#define PCI_STD_HEADER_SIZEOF 64
#define PCI_VENDOR_ID 0x00 /* 16 bits */
#define PCI_DEVICE_ID 0x02 /* 16 bits */
#define PCI_COMMAND 0x04 /* 16 bits */
#define PCI_COMMAND_IO 0x1 /* Enable response in I/O space */
#define PCI_COMMAND_MEMORY 0x2 /* Enable response in Memory space */
#define PCI_COMMAND_MASTER 0x4 /* Enable bus mastering */
#define PCI_COMMAND_SPECIAL 0x8 /* Enable response to special cycles */
#define PCI_COMMAND_INVALIDATE 0x10 /* Use memory write and invalidate */
#define PCI_COMMAND_VGA_PALETTE 0x20 /* Enable palette snooping */
#define PCI_COMMAND_PARITY 0x40 /* Enable parity checking */
#define PCI_COMMAND_WAIT 0x80 /* Enable address/data stepping */
#define PCI_COMMAND_SERR 0x100 /* Enable SERR */
#define PCI_COMMAND_FAST_BACK 0x200 /* Enable back-to-back writes */
#define PCI_STATUS 0x06 /* 16 bits */
#define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */
#define PCI_STATUS_66MHZ 0x20 /* Support 66 Mhz PCI 2.1 bus */
#define PCI_STATUS_UDF 0x40 /* Support User Definable Features [obsolete] */
#define PCI_STATUS_FAST_BACK 0x80 /* Accept fast-back to back */
#define PCI_STATUS_PARITY 0x100 /* Detected parity error */
#define PCI_STATUS_DEVSEL_MASK 0x600 /* DEVSEL timing */
#define PCI_STATUS_DEVSEL_FAST 0x000
#define PCI_STATUS_DEVSEL_MEDIUM 0x200
#define PCI_STATUS_DEVSEL_SLOW 0x400
#define PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */
#define PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */
#define PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */
#define PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
#define PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */
#define PCI_CLASS_REVISION 0x08 /* High 24 bits are class, low 8
revision */
#define PCI_REVISION_ID 0x08 /* Revision ID */
#define PCI_CLASS_PROG 0x09 /* Reg. Level Programming Interface */
#define PCI_CLASS_DEVICE 0x0a /* Device class */
#define PCI_CLASS_CODE 0x0b /* Device class code */
#define PCI_CLASS_SUB_CODE 0x0a /* Device sub-class code */
#define PCI_CACHE_LINE_SIZE 0x0c /* 8 bits */
#define PCI_LATENCY_TIMER 0x0d /* 8 bits */
#define PCI_HEADER_TYPE 0x0e /* 8 bits */
#define PCI_HEADER_TYPE_NORMAL 0
#define PCI_HEADER_TYPE_BRIDGE 1
#define PCI_HEADER_TYPE_CARDBUS 2
#define PCI_BIST 0x0f /* 8 bits */
#define PCI_BIST_CODE_MASK 0x0f /* Return result */
#define PCI_BIST_START 0x40 /* 1 to start BIST, 2 secs or less */
#define PCI_BIST_CAPABLE 0x80 /* 1 if BIST capable */
/*
* Base addresses specify locations in memory or I/O space.
* Decoded size can be determined by writing a value of
* 0xffffffff to the register, and reading it back. Only
* 1 bits are decoded.
*/
#define PCI_BASE_ADDRESS_0 0x10 /* 32 bits */
#define PCI_BASE_ADDRESS_1 0x14 /* 32 bits [htype 0,1 only] */
#define PCI_BASE_ADDRESS_2 0x18 /* 32 bits [htype 0 only] */
#define PCI_BASE_ADDRESS_3 0x1c /* 32 bits */
#define PCI_BASE_ADDRESS_4 0x20 /* 32 bits */
#define PCI_BASE_ADDRESS_5 0x24 /* 32 bits */
#define PCI_BASE_ADDRESS_SPACE 0x01 /* 0 = memory, 1 = I/O */
#define PCI_BASE_ADDRESS_SPACE_IO 0x01
#define PCI_BASE_ADDRESS_SPACE_MEMORY 0x00
#define PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06
#define PCI_BASE_ADDRESS_MEM_TYPE_32 0x00 /* 32 bit address */
#define PCI_BASE_ADDRESS_MEM_TYPE_1M 0x02 /* Below 1M [obsolete] */
#define PCI_BASE_ADDRESS_MEM_TYPE_64 0x04 /* 64 bit address */
#define PCI_BASE_ADDRESS_MEM_PREFETCH 0x08 /* prefetchable? */
#define PCI_BASE_ADDRESS_MEM_MASK (~0x0fULL)
#define PCI_BASE_ADDRESS_IO_MASK (~0x03ULL)
/* bit 1 is reserved if address_space = 1 */
/* Convert a regsister address (e.g. PCI_BASE_ADDRESS_1) to a bar # (e.g. 1) */
#define pci_offset_to_barnum(offset) \
(((offset) - PCI_BASE_ADDRESS_0) / sizeof(u32))
/* Header type 0 (normal devices) */
#define PCI_CARDBUS_CIS 0x28
#define PCI_SUBSYSTEM_VENDOR_ID 0x2c
#define PCI_SUBSYSTEM_ID 0x2e
#define PCI_ROM_ADDRESS 0x30 /* Bits 31..11 are address, 10..1 reserved */
#define PCI_ROM_ADDRESS_ENABLE 0x01
#define PCI_ROM_ADDRESS_MASK (~0x7ffULL)
#define PCI_CAPABILITY_LIST 0x34 /* Offset of first capability list entry */
/* 0x35-0x3b are reserved */
#define PCI_INTERRUPT_LINE 0x3c /* 8 bits */
#define PCI_INTERRUPT_PIN 0x3d /* 8 bits */
#define PCI_MIN_GNT 0x3e /* 8 bits */
#define PCI_MAX_LAT 0x3f /* 8 bits */
#define PCI_INTERRUPT_LINE_DISABLE 0xff
/* Header type 1 (PCI-to-PCI bridges) */
#define PCI_PRIMARY_BUS 0x18 /* Primary bus number */
#define PCI_SECONDARY_BUS 0x19 /* Secondary bus number */
#define PCI_SUBORDINATE_BUS 0x1a /* Highest bus number behind the bridge */
#define PCI_SEC_LATENCY_TIMER 0x1b /* Latency timer for secondary interface */
#define PCI_IO_BASE 0x1c /* I/O range behind the bridge */
#define PCI_IO_LIMIT 0x1d
#define PCI_IO_RANGE_TYPE_MASK 0x0f /* I/O bridging type */
#define PCI_IO_RANGE_TYPE_16 0x00
#define PCI_IO_RANGE_TYPE_32 0x01
#define PCI_IO_RANGE_MASK ~0x0f
#define PCI_SEC_STATUS 0x1e /* Secondary status register, only bit 14 used */
#define PCI_MEMORY_BASE 0x20 /* Memory range behind */
#define PCI_MEMORY_LIMIT 0x22
#define PCI_MEMORY_RANGE_TYPE_MASK 0x0f
#define PCI_MEMORY_RANGE_MASK ~0x0f
#define PCI_PREF_MEMORY_BASE 0x24 /* Prefetchable memory range behind */
#define PCI_PREF_MEMORY_LIMIT 0x26
#define PCI_PREF_RANGE_TYPE_MASK 0x0f
#define PCI_PREF_RANGE_TYPE_32 0x00
#define PCI_PREF_RANGE_TYPE_64 0x01
#define PCI_PREF_RANGE_MASK ~0x0f
#define PCI_PREF_BASE_UPPER32 0x28 /* Upper half of prefetchable memory range */
#define PCI_PREF_LIMIT_UPPER32 0x2c
#define PCI_IO_BASE_UPPER16 0x30 /* Upper half of I/O addresses */
#define PCI_IO_LIMIT_UPPER16 0x32
/* 0x34 same as for htype 0 */
/* 0x35-0x3b is reserved */
#define PCI_ROM_ADDRESS1 0x38 /* Same as PCI_ROM_ADDRESS, but for htype 1 */
/* 0x3c-0x3d are same as for htype 0 */
#define PCI_BRIDGE_CONTROL 0x3e
#define PCI_BRIDGE_CTL_PARITY 0x01 /* Enable parity detection on secondary interface */
#define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */
#define PCI_BRIDGE_CTL_NO_ISA 0x04 /* Disable bridging of ISA ports */
#define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */
#define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */
#define PCI_BRIDGE_CTL_BUS_RESET 0x40 /* Secondary bus reset */
#define PCI_BRIDGE_CTL_FAST_BACK 0x80 /* Fast Back2Back enabled on secondary interface */
/* Header type 2 (CardBus bridges) */
#define PCI_CB_CAPABILITY_LIST 0x14
/* 0x15 reserved */
#define PCI_CB_SEC_STATUS 0x16 /* Secondary status */
#define PCI_CB_PRIMARY_BUS 0x18 /* PCI bus number */
#define PCI_CB_CARD_BUS 0x19 /* CardBus bus number */
#define PCI_CB_SUBORDINATE_BUS 0x1a /* Subordinate bus number */
#define PCI_CB_LATENCY_TIMER 0x1b /* CardBus latency timer */
#define PCI_CB_MEMORY_BASE_0 0x1c
#define PCI_CB_MEMORY_LIMIT_0 0x20
#define PCI_CB_MEMORY_BASE_1 0x24
#define PCI_CB_MEMORY_LIMIT_1 0x28
#define PCI_CB_IO_BASE_0 0x2c
#define PCI_CB_IO_BASE_0_HI 0x2e
#define PCI_CB_IO_LIMIT_0 0x30
#define PCI_CB_IO_LIMIT_0_HI 0x32
#define PCI_CB_IO_BASE_1 0x34
#define PCI_CB_IO_BASE_1_HI 0x36
#define PCI_CB_IO_LIMIT_1 0x38
#define PCI_CB_IO_LIMIT_1_HI 0x3a
#define PCI_CB_IO_RANGE_MASK ~0x03
/* 0x3c-0x3d are same as for htype 0 */
#define PCI_CB_BRIDGE_CONTROL 0x3e
#define PCI_CB_BRIDGE_CTL_PARITY 0x01 /* Similar to standard bridge control register */
#define PCI_CB_BRIDGE_CTL_SERR 0x02
#define PCI_CB_BRIDGE_CTL_ISA 0x04
#define PCI_CB_BRIDGE_CTL_VGA 0x08
#define PCI_CB_BRIDGE_CTL_MASTER_ABORT 0x20
#define PCI_CB_BRIDGE_CTL_CB_RESET 0x40 /* CardBus reset */
#define PCI_CB_BRIDGE_CTL_16BIT_INT 0x80 /* Enable interrupt for 16-bit cards */
#define PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 0x100 /* Prefetch enable for both memory regions */
#define PCI_CB_BRIDGE_CTL_PREFETCH_MEM1 0x200
#define PCI_CB_BRIDGE_CTL_POST_WRITES 0x400
#define PCI_CB_SUBSYSTEM_VENDOR_ID 0x40
#define PCI_CB_SUBSYSTEM_ID 0x42
#define PCI_CB_LEGACY_MODE_BASE 0x44 /* 16-bit PC Card legacy mode base address (ExCa) */
/* 0x48-0x7f reserved */
/* Capability lists */
#define PCI_CAP_LIST_ID 0 /* Capability ID */
#define PCI_CAP_ID_PM 0x01 /* Power Management */
#define PCI_CAP_ID_AGP 0x02 /* Accelerated Graphics Port */
#define PCI_CAP_ID_VPD 0x03 /* Vital Product Data */
#define PCI_CAP_ID_SLOTID 0x04 /* Slot Identification */
#define PCI_CAP_ID_MSI 0x05 /* Message Signalled Interrupts */
#define PCI_CAP_ID_CHSWP 0x06 /* CompactPCI HotSwap */
#define PCI_CAP_ID_PCIX 0x07 /* PCI-X */
#define PCI_CAP_ID_HT 0x08 /* HyperTransport */
#define PCI_CAP_ID_VNDR 0x09 /* Vendor-Specific */
#define PCI_CAP_ID_DBG 0x0A /* Debug port */
#define PCI_CAP_ID_CCRC 0x0B /* CompactPCI Central Resource Control */
#define PCI_CAP_ID_SHPC 0x0C /* PCI Standard Hot-Plug Controller */
#define PCI_CAP_ID_SSVID 0x0D /* Bridge subsystem vendor/device ID */
#define PCI_CAP_ID_AGP3 0x0E /* AGP Target PCI-PCI bridge */
#define PCI_CAP_ID_SECDEV 0x0F /* Secure Device */
#define PCI_CAP_ID_EXP 0x10 /* PCI Express */
#define PCI_CAP_ID_MSIX 0x11 /* MSI-X */
#define PCI_CAP_ID_SATA 0x12 /* SATA Data/Index Conf. */
#define PCI_CAP_ID_AF 0x13 /* PCI Advanced Features */
#define PCI_CAP_ID_EA 0x14 /* PCI Enhanced Allocation */
#define PCI_CAP_ID_MAX PCI_CAP_ID_EA
#define PCI_CAP_LIST_NEXT 1 /* Next capability in the list */
#define PCI_CAP_FLAGS 2 /* Capability defined flags (16 bits) */
#define PCI_CAP_SIZEOF 4
/* Power Management Registers */
#define PCI_PM_CAP_VER_MASK 0x0007 /* Version */
#define PCI_PM_CAP_PME_CLOCK 0x0008 /* PME clock required */
#define PCI_PM_CAP_AUX_POWER 0x0010 /* Auxilliary power support */
#define PCI_PM_CAP_DSI 0x0020 /* Device specific initialization */
#define PCI_PM_CAP_D1 0x0200 /* D1 power state support */
#define PCI_PM_CAP_D2 0x0400 /* D2 power state support */
#define PCI_PM_CAP_PME 0x0800 /* PME pin supported */
#define PCI_PM_CTRL 4 /* PM control and status register */
#define PCI_PM_CTRL_STATE_MASK 0x0003 /* Current power state (D0 to D3) */
#define PCI_PM_CTRL_PME_ENABLE 0x0100 /* PME pin enable */
#define PCI_PM_CTRL_DATA_SEL_MASK 0x1e00 /* Data select (??) */
#define PCI_PM_CTRL_DATA_SCALE_MASK 0x6000 /* Data scale (??) */
#define PCI_PM_CTRL_PME_STATUS 0x8000 /* PME pin status */
#define PCI_PM_PPB_EXTENSIONS 6 /* PPB support extensions (??) */
#define PCI_PM_PPB_B2_B3 0x40 /* Stop clock when in D3hot (??) */
#define PCI_PM_BPCC_ENABLE 0x80 /* Bus power/clock control enable (??) */
#define PCI_PM_DATA_REGISTER 7 /* (??) */
#define PCI_PM_SIZEOF 8
/* AGP registers */
#define PCI_AGP_VERSION 2 /* BCD version number */
#define PCI_AGP_RFU 3 /* Rest of capability flags */
#define PCI_AGP_STATUS 4 /* Status register */
#define PCI_AGP_STATUS_RQ_MASK 0xff000000 /* Maximum number of requests - 1 */
#define PCI_AGP_STATUS_SBA 0x0200 /* Sideband addressing supported */
#define PCI_AGP_STATUS_64BIT 0x0020 /* 64-bit addressing supported */
#define PCI_AGP_STATUS_FW 0x0010 /* FW transfers supported */
#define PCI_AGP_STATUS_RATE4 0x0004 /* 4x transfer rate supported */
#define PCI_AGP_STATUS_RATE2 0x0002 /* 2x transfer rate supported */
#define PCI_AGP_STATUS_RATE1 0x0001 /* 1x transfer rate supported */
#define PCI_AGP_COMMAND 8 /* Control register */
#define PCI_AGP_COMMAND_RQ_MASK 0xff000000 /* Master: Maximum number of requests */
#define PCI_AGP_COMMAND_SBA 0x0200 /* Sideband addressing enabled */
#define PCI_AGP_COMMAND_AGP 0x0100 /* Allow processing of AGP transactions */
#define PCI_AGP_COMMAND_64BIT 0x0020 /* Allow processing of 64-bit addresses */
#define PCI_AGP_COMMAND_FW 0x0010 /* Force FW transfers */
#define PCI_AGP_COMMAND_RATE4 0x0004 /* Use 4x rate */
#define PCI_AGP_COMMAND_RATE2 0x0002 /* Use 4x rate */
#define PCI_AGP_COMMAND_RATE1 0x0001 /* Use 4x rate */
#define PCI_AGP_SIZEOF 12
/* PCI-X registers */
#define PCI_X_CMD_DPERR_E 0x0001 /* Data Parity Error Recovery Enable */
#define PCI_X_CMD_ERO 0x0002 /* Enable Relaxed Ordering */
#define PCI_X_CMD_MAX_READ 0x0000 /* Max Memory Read Byte Count */
#define PCI_X_CMD_MAX_SPLIT 0x0030 /* Max Outstanding Split Transactions */
#define PCI_X_CMD_VERSION(x) (((x) >> 12) & 3) /* Version */
/* Slot Identification */
#define PCI_SID_ESR 2 /* Expansion Slot Register */
#define PCI_SID_ESR_NSLOTS 0x1f /* Number of expansion slots available */
#define PCI_SID_ESR_FIC 0x20 /* First In Chassis Flag */
#define PCI_SID_CHASSIS_NR 3 /* Chassis Number */
/* Message Signalled Interrupts registers */
#define PCI_MSI_FLAGS 2 /* Various flags */
#define PCI_MSI_FLAGS_64BIT 0x80 /* 64-bit addresses allowed */
#define PCI_MSI_FLAGS_QSIZE 0x70 /* Message queue size configured */
#define PCI_MSI_FLAGS_QMASK 0x0e /* Maximum queue size available */
#define PCI_MSI_FLAGS_ENABLE 0x01 /* MSI feature enabled */
#define PCI_MSI_FLAGS_MASKBIT 0x0100 /* Per-vector masking capable */
#define PCI_MSI_RFU 3 /* Rest of capability flags */
#define PCI_MSI_ADDRESS_LO 4 /* Lower 32 bits */
#define PCI_MSI_ADDRESS_HI 8 /* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
#define PCI_MSI_DATA_32 8 /* 16 bits of data for 32-bit devices */
#define PCI_MSI_DATA_64 12 /* 16 bits of data for 64-bit devices */
#define PCI_MAX_PCI_DEVICES 32
#define PCI_MAX_PCI_FUNCTIONS 8
#define PCI_FIND_CAP_TTL 0x48
#define CAP_START_POS 0x40
/* Extended Capabilities (PCI-X 2.0 and Express) */
#define PCI_EXT_CAP_ID(header) (header & 0x0000ffff)
#define PCI_EXT_CAP_VER(header) ((header >> 16) & 0xf)
#define PCI_EXT_CAP_NEXT(header) ((header >> 20) & 0xffc)
#define PCI_EXT_CAP_ID_ERR 0x01 /* Advanced Error Reporting */
#define PCI_EXT_CAP_ID_VC 0x02 /* Virtual Channel Capability */
#define PCI_EXT_CAP_ID_DSN 0x03 /* Device Serial Number */
#define PCI_EXT_CAP_ID_PWR 0x04 /* Power Budgeting */
#define PCI_EXT_CAP_ID_RCLD 0x05 /* Root Complex Link Declaration */
#define PCI_EXT_CAP_ID_RCILC 0x06 /* Root Complex Internal Link Control */
#define PCI_EXT_CAP_ID_RCEC 0x07 /* Root Complex Event Collector */
#define PCI_EXT_CAP_ID_MFVC 0x08 /* Multi-Function VC Capability */
#define PCI_EXT_CAP_ID_VC9 0x09 /* same as _VC */
#define PCI_EXT_CAP_ID_RCRB 0x0A /* Root Complex RB? */
#define PCI_EXT_CAP_ID_VNDR 0x0B /* Vendor-Specific */
#define PCI_EXT_CAP_ID_CAC 0x0C /* Config Access - obsolete */
#define PCI_EXT_CAP_ID_ACS 0x0D /* Access Control Services */
#define PCI_EXT_CAP_ID_ARI 0x0E /* Alternate Routing ID */
#define PCI_EXT_CAP_ID_ATS 0x0F /* Address Translation Services */
#define PCI_EXT_CAP_ID_SRIOV 0x10 /* Single Root I/O Virtualization */
#define PCI_EXT_CAP_ID_MRIOV 0x11 /* Multi Root I/O Virtualization */
#define PCI_EXT_CAP_ID_MCAST 0x12 /* Multicast */
#define PCI_EXT_CAP_ID_PRI 0x13 /* Page Request Interface */
#define PCI_EXT_CAP_ID_AMD_XXX 0x14 /* Reserved for AMD */
#define PCI_EXT_CAP_ID_REBAR 0x15 /* Resizable BAR */
#define PCI_EXT_CAP_ID_DPA 0x16 /* Dynamic Power Allocation */
#define PCI_EXT_CAP_ID_TPH 0x17 /* TPH Requester */
#define PCI_EXT_CAP_ID_LTR 0x18 /* Latency Tolerance Reporting */
#define PCI_EXT_CAP_ID_SECPCI 0x19 /* Secondary PCIe Capability */
#define PCI_EXT_CAP_ID_PMUX 0x1A /* Protocol Multiplexing */
#define PCI_EXT_CAP_ID_PASID 0x1B /* Process Address Space ID */
#define PCI_EXT_CAP_ID_DPC 0x1D /* Downstream Port Containment */
#define PCI_EXT_CAP_ID_L1SS 0x1E /* L1 PM Substates */
#define PCI_EXT_CAP_ID_PTM 0x1F /* Precision Time Measurement */
#define PCI_EXT_CAP_ID_MAX PCI_EXT_CAP_ID_PTM
/* Enhanced Allocation Registers */
#define PCI_EA_NUM_ENT 2 /* Number of Capability Entries */
#define PCI_EA_NUM_ENT_MASK 0x3f /* Num Entries Mask */
#define PCI_EA_FIRST_ENT 4 /* First EA Entry in List */
#define PCI_EA_ES 0x00000007 /* Entry Size */
#define PCI_EA_BEI 0x000000f0 /* BAR Equivalent Indicator */
/* 9-14 map to VF BARs 0-5 respectively */
#define PCI_EA_BEI_VF_BAR0 9
#define PCI_EA_BEI_VF_BAR5 14
/* Base, MaxOffset registers */
/* bit 0 is reserved */
#define PCI_EA_IS_64 0x00000002 /* 64-bit field flag */
#define PCI_EA_FIELD_MASK 0xfffffffc /* For Base & Max Offset */
/* PCI Express capabilities */
#define PCI_EXP_FLAGS 2 /* Capabilities register */
#define PCI_EXP_FLAGS_VERS 0x000f /* Capability Version */
#define PCI_EXP_FLAGS_TYPE 0x00f0 /* Device/Port type */
#define PCI_EXP_TYPE_ROOT_PORT 0x4 /* Root Port */
#define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */
#define PCI_EXP_TYPE_PCIE_BRIDGE 0x8 /* PCI/PCI-X to PCIe Bridge */
#define PCI_EXP_DEVCAP 4 /* Device capabilities */
#define PCI_EXP_DEVCAP_FLR 0x10000000 /* Function Level Reset */
#define PCI_EXP_DEVCTL 8 /* Device Control */
#define PCI_EXP_DEVCTL_PAYLOAD 0x00e0 /* Max_Payload_Size */
#define PCI_EXP_DEVCTL_PAYLOAD_128B 0x0000 /* 128 Bytes */
#define PCI_EXP_DEVCTL_PAYLOAD_256B 0x0020 /* 256 Bytes */
#define PCI_EXP_DEVCTL_PAYLOAD_512B 0x0040 /* 512 Bytes */
#define PCI_EXP_DEVCTL_PAYLOAD_1024B 0x0060 /* 1024 Bytes */
#define PCI_EXP_DEVCTL_PAYLOAD_2048B 0x0080 /* 2048 Bytes */
#define PCI_EXP_DEVCTL_PAYLOAD_4096B 0x00a0 /* 4096 Bytes */
#define PCI_EXP_DEVCTL_RELAX_EN 0x0010 /* Enable relaxed ordering */
#define PCI_EXP_DEVCTL_NOSNOOP_EN 0x0800 /* Enable No Snoop */
#define PCI_EXP_DEVCTL_READRQ 0x7000 /* Max_Read_Request_Size */
#define PCI_EXP_DEVCTL_READRQ_128B 0x0000 /* 128 Bytes */
#define PCI_EXP_DEVCTL_READRQ_256B 0x1000 /* 256 Bytes */
#define PCI_EXP_DEVCTL_READRQ_512B 0x2000 /* 512 Bytes */
#define PCI_EXP_DEVCTL_READRQ_1024B 0x3000 /* 1024 Bytes */
#define PCI_EXP_DEVCTL_READRQ_2048B 0x4000 /* 2048 Bytes */
#define PCI_EXP_DEVCTL_READRQ_4096B 0x5000 /* 4096 Bytes */
#define PCI_EXP_DEVCTL_BCR_FLR 0x8000 /* Bridge Configuration Retry / FLR */
#define PCI_EXP_LNKCAP 12 /* Link Capabilities */
#define PCI_EXP_LNKCAP_SLS 0x0000000f /* Supported Link Speeds */
#define PCI_EXP_LNKCAP_SLS_2_5GB 0x00000001 /* LNKCAP2 SLS Vector bit 0 */
#define PCI_EXP_LNKCAP_SLS_5_0GB 0x00000002 /* LNKCAP2 SLS Vector bit 1 */
#define PCI_EXP_LNKCAP_SLS_8_0GB 0x00000003 /* LNKCAP2 SLS Vector bit 2 */
#define PCI_EXP_LNKCAP_MLW 0x000003f0 /* Maximum Link Width */
#define PCI_EXP_LNKCAP_DLLLARC 0x00100000 /* Data Link Layer Link Active Reporting Capable */
#define PCI_EXP_LNKCTL 16 /* Link Control */
#define PCI_EXP_LNKCTL_RL 0x0020 /* Retrain Link */
#define PCI_EXP_LNKSTA 18 /* Link Status */
#define PCI_EXP_LNKSTA_CLS 0x000f /* Current Link Speed */
#define PCI_EXP_LNKSTA_CLS_2_5GB 0x0001 /* Current Link Speed 2.5GT/s */
#define PCI_EXP_LNKSTA_CLS_5_0GB 0x0002 /* Current Link Speed 5.0GT/s */
#define PCI_EXP_LNKSTA_CLS_8_0GB 0x0003 /* Current Link Speed 8.0GT/s */
#define PCI_EXP_LNKSTA_NLW 0x03f0 /* Negotiated Link Width */
#define PCI_EXP_LNKSTA_NLW_SHIFT 4 /* start of NLW mask in link status */
#define PCI_EXP_LNKSTA_LT 0x0800 /* Link Training */
#define PCI_EXP_LNKSTA_DLLLA 0x2000 /* Data Link Layer Link Active */
#define PCI_EXP_LNKSTA_LBMS 0x4000 /* Link Bandwidth Management Status */
#define PCI_EXP_SLTCAP 20 /* Slot Capabilities */
#define PCI_EXP_SLTCAP_PSN 0xfff80000 /* Physical Slot Number */
#define PCI_EXP_RTCTL 28 /* Root Control */
#define PCI_EXP_RTCTL_CRSSVE 0x0010 /* CRS Software Visibility Enable */
#define PCI_EXP_RTCAP 30 /* Root Capabilities */
#define PCI_EXP_RTCAP_CRSVIS 0x0001 /* CRS Software Visibility capability */
#define PCI_EXP_DEVCAP2 36 /* Device Capabilities 2 */
#define PCI_EXP_DEVCAP2_ARI 0x00000020 /* ARI Forwarding Supported */
#define PCI_EXP_DEVCTL2 40 /* Device Control 2 */
#define PCI_EXP_DEVCTL2_ARI 0x0020 /* Alternative Routing-ID */
#define PCI_EXP_LNKCAP2 44 /* Link Capability 2 */
#define PCI_EXP_LNKCAP2_SLS 0x000000fe /* Supported Link Speeds Vector */
#define PCI_EXP_LNKCTL2 48 /* Link Control 2 */
#define PCI_EXP_LNKCTL2_TLS 0x000f /* Target Link Speed */
#define PCI_EXP_LNKCTL2_TLS_2_5GT 0x0001 /* Target Link Speed 2.5GT/s */
#define PCI_EXP_LNKCTL2_TLS_5_0GT 0x0002 /* Target Link Speed 5.0GT/s */
#define PCI_EXP_LNKCTL2_TLS_8_0GT 0x0003 /* Target Link Speed 8.0GT/s */
/* Advanced Error Reporting */
#define PCI_ERR_CAP 24 /* Advanced Error Capabilities */
#define PCI_ERR_CAP_FEP(x) ((x) & 31) /* First Error Pointer */
#define PCI_ERR_CAP_ECRC_GENC 0x00000020 /* ECRC Generation Capable */
#define PCI_ERR_CAP_ECRC_GENE 0x00000040 /* ECRC Generation Enable */
#define PCI_ERR_CAP_ECRC_CHKC 0x00000080 /* ECRC Check Capable */
#define PCI_ERR_CAP_ECRC_CHKE 0x00000100 /* ECRC Check Enable */
/* Single Root I/O Virtualization Registers */
#define PCI_SRIOV_CAP 0x04 /* SR-IOV Capabilities */
#define PCI_SRIOV_CTRL 0x08 /* SR-IOV Control */
#define PCI_SRIOV_CTRL_VFE 0x01 /* VF Enable */
#define PCI_SRIOV_CTRL_MSE 0x08 /* VF Memory Space Enable */
#define PCI_SRIOV_CTRL_ARI 0x10 /* ARI Capable Hierarchy */
#define PCI_SRIOV_INITIAL_VF 0x0c /* Initial VFs */
#define PCI_SRIOV_TOTAL_VF 0x0e /* Total VFs */
#define PCI_SRIOV_NUM_VF 0x10 /* Number of VFs */
#define PCI_SRIOV_VF_OFFSET 0x14 /* First VF Offset */
#define PCI_SRIOV_VF_STRIDE 0x16 /* Following VF Stride */
#define PCI_SRIOV_VF_DID 0x1a /* VF Device ID */
/* Include the ID list */
#include <pci_ids.h>
/*
* Config Address for PCI Configuration Mechanism #1
*
* See PCI Local Bus Specification, Revision 3.0,
* Section 3.2.2.3.2, Figure 3-2, p. 50.
*/
#define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
#define PCI_CONF1_DEV_SHIFT 11 /* Device number */
#define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
#define PCI_CONF1_BUS_MASK 0xff
#define PCI_CONF1_DEV_MASK 0x1f
#define PCI_CONF1_FUNC_MASK 0x7
#define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
#define PCI_CONF1_ENABLE BIT(31)
#define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
#define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
#define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
#define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
#define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
(PCI_CONF1_ENABLE | \
PCI_CONF1_BUS(bus) | \
PCI_CONF1_DEV(dev) | \
PCI_CONF1_FUNC(func) | \
PCI_CONF1_REG(reg))
/*
* Extension of PCI Config Address for accessing extended PCIe registers
*
* No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
* or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
* are used for specifying additional 4 high bits of PCI Express register.
*/
#define PCI_CONF1_EXT_REG_SHIFT 16
#define PCI_CONF1_EXT_REG_MASK 0xf00
#define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
#define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
(PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
PCI_CONF1_EXT_REG(reg))
/*
* Enhanced Configuration Access Mechanism (ECAM)
*
* See PCI Express Base Specification, Revision 5.0, Version 1.0,
* Section 7.2.2, Table 7-1, p. 677.
*/
#define PCIE_ECAM_BUS_SHIFT 20 /* Bus number */
#define PCIE_ECAM_DEV_SHIFT 15 /* Device number */
#define PCIE_ECAM_FUNC_SHIFT 12 /* Function number */
#define PCIE_ECAM_BUS_MASK 0xff
#define PCIE_ECAM_DEV_MASK 0x1f
#define PCIE_ECAM_FUNC_MASK 0x7
#define PCIE_ECAM_REG_MASK 0xfff /* Limit offset to a maximum of 4K */
#define PCIE_ECAM_BUS(x) (((x) & PCIE_ECAM_BUS_MASK) << PCIE_ECAM_BUS_SHIFT)
#define PCIE_ECAM_DEV(x) (((x) & PCIE_ECAM_DEV_MASK) << PCIE_ECAM_DEV_SHIFT)
#define PCIE_ECAM_FUNC(x) (((x) & PCIE_ECAM_FUNC_MASK) << PCIE_ECAM_FUNC_SHIFT)
#define PCIE_ECAM_REG(x) ((x) & PCIE_ECAM_REG_MASK)
#define PCIE_ECAM_OFFSET(bus, dev, func, where) \
(PCIE_ECAM_BUS(bus) | \
PCIE_ECAM_DEV(dev) | \
PCIE_ECAM_FUNC(func) | \
PCIE_ECAM_REG(where))
#ifndef __ASSEMBLY__
#include <dm/pci.h>
#ifdef CONFIG_SYS_PCI_64BIT
typedef u64 pci_addr_t;
typedef u64 pci_size_t;
#else
typedef unsigned long pci_addr_t;
typedef unsigned long pci_size_t;
#endif
struct pci_region {
pci_addr_t bus_start; /* Start on the bus */
phys_addr_t phys_start; /* Start in physical address space */
pci_size_t size; /* Size */
unsigned long flags; /* Resource flags */
pci_addr_t bus_lower;
};
#define PCI_REGION_MEM 0x00000000 /* PCI memory space */
#define PCI_REGION_IO 0x00000001 /* PCI IO space */
#define PCI_REGION_TYPE 0x00000001
#define PCI_REGION_PREFETCH 0x00000008 /* prefetchable PCI memory */
#define PCI_REGION_SYS_MEMORY 0x00000100 /* System memory */
#define PCI_REGION_RO 0x00000200 /* Read-only memory */
static inline void pci_set_region(struct pci_region *reg,
pci_addr_t bus_start,
phys_addr_t phys_start,
pci_size_t size,
unsigned long flags) {
reg->bus_start = bus_start;
reg->phys_start = phys_start;
reg->size = size;
reg->flags = flags;
}
typedef int pci_dev_t;
#define PCI_BUS(d) (((d) >> 16) & 0xff)
/*
* Please note the difference in DEVFN usage in U-Boot vs Linux. U-Boot
* uses DEVFN in bits 15-8 but Linux instead expects DEVFN in bits 7-0.
* Please see the Linux header include/uapi/linux/pci.h for more details.
* This is relevant for the following macros:
* PCI_DEV, PCI_FUNC, PCI_DEVFN
* The U-Boot macro PCI_DEV is equivalent to the Linux PCI_SLOT version with
* the remark from above (input is in bits 15-8 instead of 7-0.
*/
#define PCI_DEV(d) (((d) >> 11) & 0x1f)
#define PCI_FUNC(d) (((d) >> 8) & 0x7)
#define PCI_DEVFN(d, f) ((d) << 11 | (f) << 8)
#define PCI_MASK_BUS(bdf) ((bdf) & 0xffff)
#define PCI_ADD_BUS(bus, devfn) (((bus) << 16) | (devfn))
#define PCI_BDF(b, d, f) ((b) << 16 | PCI_DEVFN(d, f))
#define PCI_ANY_ID (~0)
/* Convert from Linux format to U-Boot format */
#define PCI_TO_BDF(val) ((val) << 8)
struct pci_device_id {
unsigned int vendor, device; /* Vendor and device ID or PCI_ANY_ID */
unsigned int subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
unsigned int class, class_mask; /* (class,subclass,prog-if) triplet */
unsigned long driver_data; /* Data private to the driver */
};
struct pci_controller;
struct pci_config_table {
unsigned int vendor, device; /* Vendor and device ID or PCI_ANY_ID */
unsigned int class; /* Class ID, or PCI_ANY_ID */
unsigned int bus; /* Bus number, or PCI_ANY_ID */
unsigned int dev; /* Device number, or PCI_ANY_ID */
unsigned int func; /* Function number, or PCI_ANY_ID */
void (*config_device)(struct pci_controller* hose, pci_dev_t dev,
struct pci_config_table *);
unsigned long priv[3];
};
extern void pci_cfgfunc_do_nothing(struct pci_controller* hose, pci_dev_t dev,
struct pci_config_table *);
extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t dev,
struct pci_config_table *);
#define INDIRECT_TYPE_NO_PCIE_LINK 1
/**
* Structure of a PCI controller (host bridge)
*
* With driver model this is dev_get_uclass_priv(bus)
*
* @skip_auto_config_until_reloc: true to avoid auto-config until U-Boot has
* relocated. Normally if PCI is used before relocation, this happens
* before relocation also. Some platforms set up static configuration in
* TPL/SPL to reduce code size and boot time, since these phases only know
* about a small subset of PCI devices. This is normally false.
*/
struct pci_controller {
struct udevice *bus;
struct udevice *ctlr;
bool skip_auto_config_until_reloc;
int first_busno;
int last_busno;
volatile unsigned int *cfg_addr;
volatile unsigned char *cfg_data;
int indirect_type;
/*
* TODO(sjg@chromium.org): With driver model we use struct
* pci_controller for both the controller and any bridge devices
* attached to it. But there is only one region list and it is in the
* top-level controller.
*
* This could be changed so that struct pci_controller is only used
* for PCI controllers and a separate UCLASS (or perhaps
* UCLASS_PCI_GENERIC) is used for bridges.
*/
struct pci_region *regions;
int region_count;
struct pci_config_table *config_table;
void (*fixup_irq)(struct pci_controller *, pci_dev_t);
/* Used by auto config */
struct pci_region *pci_mem, *pci_io, *pci_prefetch;
};
#if defined(CONFIG_DM_PCI_COMPAT)
extern phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
pci_addr_t addr, unsigned long flags);
extern pci_addr_t pci_hose_phys_to_bus(struct pci_controller* hose,
phys_addr_t addr, unsigned long flags);
#define pci_phys_to_bus(dev, addr, flags) \
pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
#define pci_bus_to_phys(dev, addr, flags) \
pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
#define pci_virt_to_bus(dev, addr, flags) \
pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), \
(virt_to_phys(addr)), (flags))
#define pci_bus_to_virt(dev, addr, flags, len, map_flags) \
map_physmem(pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), \
(addr), (flags)), \
(len), (map_flags))
#define pci_phys_to_mem(dev, addr) \
pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
#define pci_mem_to_phys(dev, addr) \
pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
#define pci_phys_to_io(dev, addr) pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
#define pci_io_to_phys(dev, addr) pci_bus_to_phys((dev), (addr), PCI_REGION_IO)
#define pci_virt_to_mem(dev, addr) \
pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
#define pci_mem_to_virt(dev, addr, len, map_flags) \
pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
#define pci_virt_to_io(dev, addr) \
pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
#define pci_io_to_virt(dev, addr, len, map_flags) \
pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))
/* For driver model these are defined in macros in pci_compat.c */
extern int pci_hose_read_config_byte(struct pci_controller *hose,
pci_dev_t dev, int where, u8 *val);
extern int pci_hose_read_config_word(struct pci_controller *hose,
pci_dev_t dev, int where, u16 *val);
extern int pci_hose_read_config_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u32 *val);
extern int pci_hose_write_config_byte(struct pci_controller *hose,
pci_dev_t dev, int where, u8 val);
extern int pci_hose_write_config_word(struct pci_controller *hose,
pci_dev_t dev, int where, u16 val);
extern int pci_hose_write_config_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u32 val);
#endif
void pciauto_region_init(struct pci_region *res);
void pciauto_region_align(struct pci_region *res, pci_size_t size);
void pciauto_config_init(struct pci_controller *hose);
/**
* pciauto_region_allocate() - Allocate resources from a PCI resource region
*
* Allocates @size bytes from the PCI resource @res. If @supports_64bit is
* false, the result will be guaranteed to fit in 32 bits.
*
* @res: PCI region to allocate from
* @size: Amount of bytes to allocate
* @bar: Returns the PCI bus address of the allocated resource
* @supports_64bit: Whether to allow allocations above the 32-bit boundary
* Return: 0 if successful, -1 on failure
*/
int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
pci_addr_t *bar, bool supports_64bit);
int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev);
#if defined(CONFIG_DM_PCI_COMPAT)
extern int pci_hose_read_config_byte_via_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u8 *val);
extern int pci_hose_read_config_word_via_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u16 *val);
extern int pci_hose_write_config_byte_via_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u8 val);
extern int pci_hose_write_config_word_via_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u16 val);
extern void *pci_map_bar(pci_dev_t pdev, int bar, int flags);
extern void pci_register_hose(struct pci_controller* hose);
extern struct pci_controller* pci_bus_to_hose(int bus);
extern struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr);
extern struct pci_controller *pci_get_hose_head(void);
extern int pci_hose_scan(struct pci_controller *hose);
extern int pci_hose_scan_bus(struct pci_controller *hose, int bus);
extern void pciauto_setup_device(struct pci_controller *hose,
pci_dev_t dev, int bars_num,
struct pci_region *mem,
struct pci_region *prefetch,
struct pci_region *io);
extern void pciauto_prescan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
extern void pciauto_postscan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int index);
extern pci_dev_t pci_find_devices (struct pci_device_id *ids, int index);
pci_dev_t pci_find_class(unsigned int find_class, int index);
extern int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
int cap);
extern int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
u8 hdr_type);
extern int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos,
int cap);
int pci_find_next_ext_capability(struct pci_controller *hose,
pci_dev_t dev, int start, int cap);
int pci_hose_find_ext_capability(struct pci_controller *hose,
pci_dev_t dev, int cap);
#endif /* defined(CONFIG_DM_PCI_COMPAT) */
const char * pci_class_str(u8 class);
int pci_last_busno(void);
#ifdef CONFIG_MPC85xx
extern void pci_mpc85xx_init (struct pci_controller *hose);
#endif
/**
* pci_write_bar32() - Write the address of a BAR including control bits
*
* This writes a raw address (with control bits) to a bar. This can be used
* with devices which require hard-coded addresses, not part of the normal
* PCI enumeration process.
*
* This is only available if CONFIG_DM_PCI_COMPAT is enabled
*
* @hose: PCI hose to use
* @dev: PCI device to update
* @barnum: BAR number (0-5)
* @addr: BAR address with control bits
*/
void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
u32 addr);
/**
* pci_read_bar32() - read the address of a bar
*
* This is only available if CONFIG_DM_PCI_COMPAT is enabled
*
* @hose: PCI hose to use
* @dev: PCI device to inspect
* @barnum: BAR number (0-5)
* Return: address of the bar, masking out any control bits
* */
u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum);
/**
* pci_hose_find_devices() - Find devices by vendor/device ID
*
* This is only available if CONFIG_DM_PCI_COMPAT is enabled
*
* @hose: PCI hose to search
* @busnum: Bus number to search
* @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
* @indexp: Pointer to device index to find. To find the first matching
* device, pass 0; to find the second, pass 1, etc. This
* parameter is decremented for each non-matching device so
* can be called repeatedly.
*/
pci_dev_t pci_hose_find_devices(struct pci_controller *hose, int busnum,
struct pci_device_id *ids, int *indexp);
/* Access sizes for PCI reads and writes */
enum pci_size_t {
PCI_SIZE_8,
PCI_SIZE_16,
PCI_SIZE_32,
};
struct udevice;
/**
* struct pci_child_plat - information stored about each PCI device
*
* Every device on a PCI bus has this per-child data.
*
* It can be accessed using dev_get_parent_plat(dev) if dev->parent is a
* PCI bus (i.e. UCLASS_PCI)
*
* @devfn: Encoded device and function index - see PCI_DEVFN()
* @vendor: PCI vendor ID (see pci_ids.h)
* @device: PCI device ID (see pci_ids.h)
* @class: PCI class, 3 bytes: (base, sub, prog-if)
* @is_virtfn: True for Virtual Function device
* @pfdev: Handle to Physical Function device
* @virtid: Virtual Function Index
*/
struct pci_child_plat {
int devfn;
unsigned short vendor;
unsigned short device;
unsigned int class;
/* Variables for CONFIG_PCI_SRIOV */
bool is_virtfn;
struct udevice *pfdev;
int virtid;
};
/* PCI bus operations */
struct dm_pci_ops {
/**
* read_config() - Read a PCI configuration value
*
* PCI buses must support reading and writing configuration values
* so that the bus can be scanned and its devices configured.
*
* Normally PCI_BUS(@bdf) is the same as @dev_seq(bus), but not always.
* If bridges exist it is possible to use the top-level bus to
* access a sub-bus. In that case @bus will be the top-level bus
* and PCI_BUS(bdf) will be a different (higher) value
*
* @bus: Bus to read from
* @bdf: Bus, device and function to read
* @offset: Byte offset within the device's configuration space
* @valuep: Place to put the returned value
* @size: Access size
* @return 0 if OK, -ve on error
*/
int (*read_config)(const struct udevice *bus, pci_dev_t bdf,
uint offset, ulong *valuep, enum pci_size_t size);
/**
* write_config() - Write a PCI configuration value
*
* @bus: Bus to write to
* @bdf: Bus, device and function to write
* @offset: Byte offset within the device's configuration space
* @value: Value to write
* @size: Access size
* @return 0 if OK, -ve on error
*/
int (*write_config)(struct udevice *bus, pci_dev_t bdf, uint offset,
ulong value, enum pci_size_t size);
};
/* Get access to a PCI bus' operations */
#define pci_get_ops(dev) ((struct dm_pci_ops *)(dev)->driver->ops)
/**
* dm_pci_get_bdf() - Get the BDF value for a device
*
* @dev: Device to check
* Return: bus/device/function value (see PCI_BDF())
*/
pci_dev_t dm_pci_get_bdf(const struct udevice *dev);
/**
* pci_bind_bus_devices() - scan a PCI bus and bind devices
*
* Scan a PCI bus looking for devices. Bind each one that is found. If
* devices are already bound that match the scanned devices, just update the
* child data so that the device can be used correctly (this happens when
* the device tree describes devices we expect to see on the bus).
*
* Devices that are bound in this way will use a generic PCI driver which
* does nothing. The device can still be accessed but will not provide any
* driver interface.
*
* @bus: Bus containing devices to bind
* Return: 0 if OK, -ve on error
*/
int pci_bind_bus_devices(struct udevice *bus);
/**
* pci_auto_config_devices() - configure bus devices ready for use
*
* This works through all devices on a bus by scanning the driver model
* data structures (normally these have been set up by pci_bind_bus_devices()
* earlier).
*
* Space is allocated for each PCI base address register (BAR) so that the
* devices are mapped into memory and I/O space ready for use.
*
* @bus: Bus containing devices to bind
* Return: 0 if OK, -ve on error
*/
int pci_auto_config_devices(struct udevice *bus);
/**
* dm_pci_bus_find_bdf() - Find a device given its PCI bus address
*
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @devp: Returns the device for this address, if found
* Return: 0 if OK, -ENODEV if not found
*/
int dm_pci_bus_find_bdf(pci_dev_t bdf, struct udevice **devp);
/**
* pci_bus_find_devfn() - Find a device on a bus
*
* @find_devfn: PCI device address (device and function only)
* @devp: Returns the device for this address, if found
* Return: 0 if OK, -ENODEV if not found
*/
int pci_bus_find_devfn(const struct udevice *bus, pci_dev_t find_devfn,
struct udevice **devp);
/**
* pci_find_first_device() - return the first available PCI device
*
* This function and pci_find_next_device() allow iteration through all
* available PCI devices on all buses. Assuming there are any, this will
* return the first one.
*
* @devp: Set to the first available device, or NULL if no more are left
* or we got an error
* Return: 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
*/
int pci_find_first_device(struct udevice **devp);
/**
* pci_find_next_device() - return the next available PCI device
*
* Finds the next available PCI device after the one supplied, or sets @devp
* to NULL if there are no more.
*
* @devp: On entry, the last device returned. Set to the next available
* device, or NULL if no more are left or we got an error
* Return: 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
*/
int pci_find_next_device(struct udevice **devp);
/**
* pci_get_ff() - Returns a mask for the given access size
*
* @size: Access size
* Return: 0xff for PCI_SIZE_8, 0xffff for PCI_SIZE_16, 0xffffffff for
* PCI_SIZE_32
*/
int pci_get_ff(enum pci_size_t size);
/**
* pci_bus_find_devices () - Find devices on a bus
*
* @bus: Bus to search
* @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
* @indexp: Pointer to device index to find. To find the first matching
* device, pass 0; to find the second, pass 1, etc. This
* parameter is decremented for each non-matching device so
* can be called repeatedly.
* @devp: Returns matching device if found
* Return: 0 if found, -ENODEV if not
*/
int pci_bus_find_devices(struct udevice *bus, const struct pci_device_id *ids,
int *indexp, struct udevice **devp);
/**
* pci_find_device_id() - Find a device on any bus
*
* @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
* @index: Index number of device to find, 0 for the first match, 1 for
* the second, etc.
* @devp: Returns matching device if found
* Return: 0 if found, -ENODEV if not
*/
int pci_find_device_id(const struct pci_device_id *ids, int index,
struct udevice **devp);
/**
* dm_pci_hose_probe_bus() - probe a subordinate bus, scanning it for devices
*
* This probes the given bus which causes it to be scanned for devices. The
* devices will be bound but not probed.
*
* @hose specifies the PCI hose that will be used for the scan. This is
* always a top-level bus with uclass UCLASS_PCI. The bus to scan is
* in @bdf, and is a subordinate bus reachable from @hose.
*
* @hose: PCI hose to scan
* @bdf: PCI bus address to scan (PCI_BUS(bdf) is the bus number)
* Return: 0 if OK, -ve on error
*/
int dm_pci_hose_probe_bus(struct udevice *bus);
/**
* pci_bus_read_config() - Read a configuration value from a device
*
* TODO(sjg@chromium.org): We should be able to pass just a device and have
* it do the right thing. It would be good to have that function also.
*
* @bus: Bus to read from
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to read
* @valuep: Place to put the returned value
* @size: Access size
* Return: 0 if OK, -ve on error
*/
int pci_bus_read_config(const struct udevice *bus, pci_dev_t bdf, int offset,
unsigned long *valuep, enum pci_size_t size);
/**
* pci_bus_write_config() - Write a configuration value to a device
*
* @bus: Bus to write from
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to write
* @value: Value to write
* @size: Access size
* Return: 0 if OK, -ve on error
*/
int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
unsigned long value, enum pci_size_t size);
/**
* pci_bus_clrset_config32() - Update a configuration value for a device
*
* The register at @offset is updated to (oldvalue & ~clr) | set.
*
* @bus: Bus to access
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to update
* @clr: Bits to clear
* @set: Bits to set
* Return: 0 if OK, -ve on error
*/
int pci_bus_clrset_config32(struct udevice *bus, pci_dev_t bdf, int offset,
u32 clr, u32 set);
/**
* Driver model PCI config access functions. Use these in preference to others
* when you have a valid device
*/
int dm_pci_read_config(const struct udevice *dev, int offset,
unsigned long *valuep, enum pci_size_t size);
int dm_pci_read_config8(const struct udevice *dev, int offset, u8 *valuep);
int dm_pci_read_config16(const struct udevice *dev, int offset, u16 *valuep);
int dm_pci_read_config32(const struct udevice *dev, int offset, u32 *valuep);
int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value,
enum pci_size_t size);
int dm_pci_write_config8(struct udevice *dev, int offset, u8 value);
int dm_pci_write_config16(struct udevice *dev, int offset, u16 value);
int dm_pci_write_config32(struct udevice *dev, int offset, u32 value);
/**
* These permit convenient read/modify/write on PCI configuration. The
* register is updated to (oldvalue & ~clr) | set.
*/
int dm_pci_clrset_config8(struct udevice *dev, int offset, u32 clr, u32 set);
int dm_pci_clrset_config16(struct udevice *dev, int offset, u32 clr, u32 set);
int dm_pci_clrset_config32(struct udevice *dev, int offset, u32 clr, u32 set);
/*
* The following functions provide access to the above without needing the
* size parameter. We are trying to encourage the use of the 8/16/32-style
* functions, rather than byte/word/dword. But both are supported.
*/
int pci_write_config32(pci_dev_t pcidev, int offset, u32 value);
int pci_write_config16(pci_dev_t pcidev, int offset, u16 value);
int pci_write_config8(pci_dev_t pcidev, int offset, u8 value);
int pci_read_config32(pci_dev_t pcidev, int offset, u32 *valuep);
int pci_read_config16(pci_dev_t pcidev, int offset, u16 *valuep);
int pci_read_config8(pci_dev_t pcidev, int offset, u8 *valuep);
/**
* pci_generic_mmap_write_config() - Generic helper for writing to
* memory-mapped PCI configuration space.
* @bus: Pointer to the PCI bus
* @addr_f: Callback for calculating the config space address
* @bdf: Identifies the PCI device to access
* @offset: The offset into the device's configuration space
* @value: The value to write
* @size: Indicates the size of access to perform
*
* Write the value @value of size @size from offset @offset within the
* configuration space of the device identified by the bus, device & function
* numbers in @bdf on the PCI bus @bus. The callback function @addr_f is
* responsible for calculating the CPU address of the respective configuration
* space offset.
*
* Return: 0 on success, else -EINVAL
*/
int pci_generic_mmap_write_config(
const struct udevice *bus,
int (*addr_f)(const struct udevice *bus, pci_dev_t bdf, uint offset,
void **addrp),
pci_dev_t bdf,
uint offset,
ulong value,
enum pci_size_t size);
/**
* pci_generic_mmap_read_config() - Generic helper for reading from
* memory-mapped PCI configuration space.
* @bus: Pointer to the PCI bus
* @addr_f: Callback for calculating the config space address
* @bdf: Identifies the PCI device to access
* @offset: The offset into the device's configuration space
* @valuep: A pointer at which to store the read value
* @size: Indicates the size of access to perform
*
* Read a value of size @size from offset @offset within the configuration
* space of the device identified by the bus, device & function numbers in @bdf
* on the PCI bus @bus. The callback function @addr_f is responsible for
* calculating the CPU address of the respective configuration space offset.
*
* Return: 0 on success, else -EINVAL
*/
int pci_generic_mmap_read_config(
const struct udevice *bus,
int (*addr_f)(const struct udevice *bus, pci_dev_t bdf, uint offset,
void **addrp),
pci_dev_t bdf,
uint offset,
ulong *valuep,
enum pci_size_t size);
#if defined(CONFIG_PCI_SRIOV)
/**
* pci_sriov_init() - Scan Virtual Function devices
*
* @pdev: Physical Function udevice handle
* @vf_en: Number of Virtual Function devices to enable
* Return: 0 on success, -ve on error
*/
int pci_sriov_init(struct udevice *pdev, int vf_en);
/**
* pci_sriov_get_totalvfs() - Get total available Virtual Function devices
*
* @pdev: Physical Function udevice handle
* Return: count on success, -ve on error
*/
int pci_sriov_get_totalvfs(struct udevice *pdev);
#endif
#ifdef CONFIG_DM_PCI_COMPAT
/* Compatibility with old naming */
static inline int pci_write_config_dword(pci_dev_t pcidev, int offset,
u32 value)
{
return pci_write_config32(pcidev, offset, value);
}
/* Compatibility with old naming */
static inline int pci_write_config_word(pci_dev_t pcidev, int offset,
u16 value)
{
return pci_write_config16(pcidev, offset, value);
}
/* Compatibility with old naming */
static inline int pci_write_config_byte(pci_dev_t pcidev, int offset,
u8 value)
{
return pci_write_config8(pcidev, offset, value);
}
/* Compatibility with old naming */
static inline int pci_read_config_dword(pci_dev_t pcidev, int offset,
u32 *valuep)
{
return pci_read_config32(pcidev, offset, valuep);
}
/* Compatibility with old naming */
static inline int pci_read_config_word(pci_dev_t pcidev, int offset,
u16 *valuep)
{
return pci_read_config16(pcidev, offset, valuep);
}
/* Compatibility with old naming */
static inline int pci_read_config_byte(pci_dev_t pcidev, int offset,
u8 *valuep)
{
return pci_read_config8(pcidev, offset, valuep);
}
#endif /* CONFIG_DM_PCI_COMPAT */
/**
* dm_pciauto_config_device() - configure a device ready for use
*
* Space is allocated for each PCI base address register (BAR) so that the
* devices are mapped into memory and I/O space ready for use.
*
* @dev: Device to configure
* Return: 0 if OK, -ve on error
*/
int dm_pciauto_config_device(struct udevice *dev);
/**
* pci_conv_32_to_size() - convert a 32-bit read value to the given size
*
* Some PCI buses must always perform 32-bit reads. The data must then be
* shifted and masked to reflect the required access size and offset. This
* function performs this transformation.
*
* @value: Value to transform (32-bit value read from @offset & ~3)
* @offset: Register offset that was read
* @size: Required size of the result
* Return: the value that would have been obtained if the read had been
* performed at the given offset with the correct size
*/
ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size);
/**
* pci_conv_size_to_32() - update a 32-bit value to prepare for a write
*
* Some PCI buses must always perform 32-bit writes. To emulate a smaller
* write the old 32-bit data must be read, updated with the required new data
* and written back as a 32-bit value. This function performs the
* transformation from the old value to the new value.
*
* @value: Value to transform (32-bit value read from @offset & ~3)
* @offset: Register offset that should be written
* @size: Required size of the write
* Return: the value that should be written as a 32-bit access to @offset & ~3.
*/
ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
enum pci_size_t size);
/**
* pci_get_controller() - obtain the controller to use for a bus
*
* @dev: Device to check
* Return: pointer to the controller device for this bus
*/
struct udevice *pci_get_controller(struct udevice *dev);
/**
* pci_get_regions() - obtain pointers to all the region types
*
* @dev: Device to check
* @iop: Returns a pointer to the I/O region, or NULL if none
* @memp: Returns a pointer to the memory region, or NULL if none
* @prefp: Returns a pointer to the pre-fetch region, or NULL if none
* Return: the number of non-NULL regions returned, normally 3
*/
int pci_get_regions(struct udevice *dev, struct pci_region **iop,
struct pci_region **memp, struct pci_region **prefp);
int
pci_get_dma_regions(struct udevice *dev, struct pci_region *memp, int index);
/**
* dm_pci_write_bar32() - Write the address of a BAR
*
* This writes a raw address to a bar
*
* @dev: PCI device to update
* @barnum: BAR number (0-5)
* @addr: BAR address
*/
void dm_pci_write_bar32(struct udevice *dev, int barnum, u32 addr);
/**
* dm_pci_read_bar32() - read a base address register from a device
*
* @dev: Device to check
* @barnum: Bar number to read (numbered from 0)
* @return: value of BAR
*/
u32 dm_pci_read_bar32(const struct udevice *dev, int barnum);
/**
* dm_pci_bus_to_phys() - convert a PCI bus address range to a physical address
*
* @dev: Device containing the PCI address
* @addr: PCI address to convert
* @len: Length of the address range
* @mask: Mask to match flags for the region type
* @flags: Flags for the region type (PCI_REGION_...)
* Return: physical address corresponding to that PCI bus address
*/
phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t addr, size_t len,
unsigned long mask, unsigned long flags);
/**
* dm_pci_phys_to_bus() - convert a physical address to a PCI bus address
*
* @dev: Device containing the bus address
* @addr: Physical address to convert
* @len: Length of the address range
* @mask: Mask to match flags for the region type
* @flags: Flags for the region type (PCI_REGION_...)
* Return: PCI bus address corresponding to that physical address
*/
pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr, size_t len,
unsigned long mask, unsigned long flags);
/**
* dm_pci_map_bar() - get a virtual address associated with a BAR region
*
* Looks up a base address register and finds the physical memory address
* that corresponds to it.
* Can be used for 32b BARs 0-5 on type 0 functions and for 32b BARs 0-1 on
* type 1 functions.
* Can also be used on type 0 functions that support Enhanced Allocation for
* 32b/64b BARs. Note that duplicate BEI entries are not supported.
*
* @dev: Device to check
* @bar: Bar register offset (PCI_BASE_ADDRESS_...)
* @offset: Offset from the base to map
* @len: Length to map
* @mask: Mask to match flags for the region type
* @flags: Flags for the region type (PCI_REGION_...)
* @return: pointer to the virtual address to use or 0 on error
*/
void *dm_pci_map_bar(struct udevice *dev, int bar, size_t offset, size_t len,
unsigned long mask, unsigned long flags);
/**
* dm_pci_find_next_capability() - find a capability starting from an offset
*
* Tell if a device supports a given PCI capability. Returns the
* address of the requested capability structure within the device's
* PCI configuration space or 0 in case the device does not support it.
*
* Possible values for @cap:
*
* %PCI_CAP_ID_MSI Message Signalled Interrupts
* %PCI_CAP_ID_PCIX PCI-X
* %PCI_CAP_ID_EXP PCI Express
* %PCI_CAP_ID_MSIX MSI-X
*
* See PCI_CAP_ID_xxx for the complete capability ID codes.
*
* @dev: PCI device to query
* @start: offset to start from
* @cap: capability code
* @return: capability address or 0 if not supported
*/
int dm_pci_find_next_capability(struct udevice *dev, u8 start, int cap);
/**
* dm_pci_find_capability() - find a capability
*
* Tell if a device supports a given PCI capability. Returns the
* address of the requested capability structure within the device's
* PCI configuration space or 0 in case the device does not support it.
*
* Possible values for @cap:
*
* %PCI_CAP_ID_MSI Message Signalled Interrupts
* %PCI_CAP_ID_PCIX PCI-X
* %PCI_CAP_ID_EXP PCI Express
* %PCI_CAP_ID_MSIX MSI-X
*
* See PCI_CAP_ID_xxx for the complete capability ID codes.
*
* @dev: PCI device to query
* @cap: capability code
* @return: capability address or 0 if not supported
*/
int dm_pci_find_capability(struct udevice *dev, int cap);
/**
* dm_pci_find_next_ext_capability() - find an extended capability
* starting from an offset
*
* Tell if a device supports a given PCI express extended capability.
* Returns the address of the requested extended capability structure
* within the device's PCI configuration space or 0 in case the device
* does not support it.
*
* Possible values for @cap:
*
* %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
* %PCI_EXT_CAP_ID_VC Virtual Channel
* %PCI_EXT_CAP_ID_DSN Device Serial Number
* %PCI_EXT_CAP_ID_PWR Power Budgeting
*
* See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
*
* @dev: PCI device to query
* @start: offset to start from
* @cap: extended capability code
* @return: extended capability address or 0 if not supported
*/
int dm_pci_find_next_ext_capability(struct udevice *dev, int start, int cap);
/**
* dm_pci_find_ext_capability() - find an extended capability
*
* Tell if a device supports a given PCI express extended capability.
* Returns the address of the requested extended capability structure
* within the device's PCI configuration space or 0 in case the device
* does not support it.
*
* Possible values for @cap:
*
* %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
* %PCI_EXT_CAP_ID_VC Virtual Channel
* %PCI_EXT_CAP_ID_DSN Device Serial Number
* %PCI_EXT_CAP_ID_PWR Power Budgeting
*
* See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
*
* @dev: PCI device to query
* @cap: extended capability code
* @return: extended capability address or 0 if not supported
*/
int dm_pci_find_ext_capability(struct udevice *dev, int cap);
/**
* dm_pci_flr() - Perform FLR if the device suppoorts it
*
* @dev: PCI device to reset
* @return: 0 if OK, -ENOENT if FLR is not supported by dev
*/
int dm_pci_flr(struct udevice *dev);
#define dm_pci_virt_to_bus(dev, addr, flags) \
dm_pci_phys_to_bus(dev, (virt_to_phys(addr)), 0, PCI_REGION_TYPE, (flags))
#define dm_pci_bus_to_virt(dev, addr, len, mask, flags, map_flags) \
({ \
size_t _len = (len); \
phys_addr_t phys_addr = dm_pci_bus_to_phys((dev), (addr), _len, \
(mask), (flags)); \
map_physmem(phys_addr, _len, (map_flags)); \
})
#define dm_pci_phys_to_mem(dev, addr) \
dm_pci_phys_to_bus((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_MEM)
#define dm_pci_mem_to_phys(dev, addr) \
dm_pci_bus_to_phys((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_MEM)
#define dm_pci_phys_to_io(dev, addr) \
dm_pci_phys_to_bus((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_IO)
#define dm_pci_io_to_phys(dev, addr) \
dm_pci_bus_to_phys((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_IO)
#define dm_pci_virt_to_mem(dev, addr) \
dm_pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
#define dm_pci_mem_to_virt(dev, addr, len, map_flags) \
dm_pci_bus_to_virt((dev), (addr), (len), PCI_REGION_TYPE, \
PCI_REGION_MEM, (map_flags))
#define dm_pci_virt_to_io(dev, addr) \
dm_pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
#define dm_pci_io_to_virt(dev, addr, len, map_flags) \
dm_pci_bus_to_virt((dev), (addr), (len), PCI_REGION_TYPE, \
PCI_REGION_IO, (map_flags))
/**
* dm_pci_find_device() - find a device by vendor/device ID
*
* @vendor: Vendor ID
* @device: Device ID
* @index: 0 to find the first match, 1 for second, etc.
* @devp: Returns pointer to the device, if found
* Return: 0 if found, -ve on error
*/
int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
struct udevice **devp);
/**
* dm_pci_find_class() - find a device by class
*
* @find_class: 3-byte (24-bit) class value to find
* @index: 0 to find the first match, 1 for second, etc.
* @devp: Returns pointer to the device, if found
* Return: 0 if found, -ve on error
*/
int dm_pci_find_class(uint find_class, int index, struct udevice **devp);
/**
* struct pci_emul_uc_priv - holds info about an emulator device
*
* There is always at most one emulator per client
*
* @client: Client device if any, else NULL
*/
struct pci_emul_uc_priv {
struct udevice *client;
};
/**
* struct dm_pci_emul_ops - PCI device emulator operations
*/
struct dm_pci_emul_ops {
/**
* read_config() - Read a PCI configuration value
*
* @dev: Emulated device to read from
* @offset: Byte offset within the device's configuration space
* @valuep: Place to put the returned value
* @size: Access size
* @return 0 if OK, -ve on error
*/
int (*read_config)(const struct udevice *dev, uint offset,
ulong *valuep, enum pci_size_t size);
/**
* write_config() - Write a PCI configuration value
*
* @dev: Emulated device to write to
* @offset: Byte offset within the device's configuration space
* @value: Value to write
* @size: Access size
* @return 0 if OK, -ve on error
*/
int (*write_config)(struct udevice *dev, uint offset, ulong value,
enum pci_size_t size);
/**
* read_io() - Read a PCI I/O value
*
* @dev: Emulated device to read from
* @addr: I/O address to read
* @valuep: Place to put the returned value
* @size: Access size
* @return 0 if OK, -ENOENT if @addr is not mapped by this device,
* other -ve value on error
*/
int (*read_io)(struct udevice *dev, unsigned int addr, ulong *valuep,
enum pci_size_t size);
/**
* write_io() - Write a PCI I/O value
*
* @dev: Emulated device to write from
* @addr: I/O address to write
* @value: Value to write
* @size: Access size
* @return 0 if OK, -ENOENT if @addr is not mapped by this device,
* other -ve value on error
*/
int (*write_io)(struct udevice *dev, unsigned int addr,
ulong value, enum pci_size_t size);
/**
* map_physmem() - Map a device into sandbox memory
*
* @dev: Emulated device to map
* @addr: Memory address, normally corresponding to a PCI BAR.
* The device should have been configured to have a BAR
* at this address.
* @lenp: On entry, the size of the area to map, On exit it is
* updated to the size actually mapped, which may be less
* if the device has less space
* @ptrp: Returns a pointer to the mapped address. The device's
* space can be accessed as @lenp bytes starting here
* @return 0 if OK, -ENOENT if @addr is not mapped by this device,
* other -ve value on error
*/
int (*map_physmem)(struct udevice *dev, phys_addr_t addr,
unsigned long *lenp, void **ptrp);
/**
* unmap_physmem() - undo a memory mapping
*
* This must be called after map_physmem() to undo the mapping.
* Some devices can use this to check what has been written into
* their mapped memory and perform an operations they require on it.
* In this way, map/unmap can be used as a sort of handshake between
* the emulated device and its users.
*
* @dev: Emuated device to unmap
* @vaddr: Mapped memory address, as passed to map_physmem()
* @len: Size of area mapped, as returned by map_physmem()
* @return 0 if OK, -ve on error
*/
int (*unmap_physmem)(struct udevice *dev, const void *vaddr,
unsigned long len);
};
/* Get access to a PCI device emulator's operations */
#define pci_get_emul_ops(dev) ((struct dm_pci_emul_ops *)(dev)->driver->ops)
/**
* sandbox_pci_get_emul() - Get the emulation device for a PCI device
*
* Searches for a suitable emulator for the given PCI bus device
*
* @bus: PCI bus to search
* @find_devfn: PCI device and function address (PCI_DEVFN())
* @containerp: Returns container device if found
* @emulp: Returns emulated device if found
* Return: 0 if found, -ENODEV if not found
*/
int sandbox_pci_get_emul(const struct udevice *bus, pci_dev_t find_devfn,
struct udevice **containerp, struct udevice **emulp);
/**
* sandbox_pci_get_client() - Find the client for an emulation device
*
* @emul: Emulation device to check
* @devp: Returns the client device emulated by this device
* Return: 0 if OK, -ENOENT if the device has no client yet
*/
int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp);
/**
* board_pci_fixup_dev() - Board callback for PCI device fixups
*
* @bus: PCI bus
* @dev: PCI device
*/
extern void board_pci_fixup_dev(struct udevice *bus, struct udevice *dev);
/**
* PCI_DEVICE - macro used to describe a specific pci device
* @vend: the 16 bit PCI Vendor ID
* @dev: the 16 bit PCI Device ID
*
* This macro is used to create a struct pci_device_id that matches a
* specific device. The subvendor and subdevice fields will be set to
* PCI_ANY_ID.
*/
#define PCI_DEVICE(vend, dev) \
.vendor = (vend), .device = (dev), \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
/**
* PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
* @vend: the 16 bit PCI Vendor ID
* @dev: the 16 bit PCI Device ID
* @subvend: the 16 bit PCI Subvendor ID
* @subdev: the 16 bit PCI Subdevice ID
*
* This macro is used to create a struct pci_device_id that matches a
* specific device with subsystem information.
*/
#define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
.vendor = (vend), .device = (dev), \
.subvendor = (subvend), .subdevice = (subdev)
/**
* PCI_DEVICE_CLASS - macro used to describe a specific pci device class
* @dev_class: the class, subclass, prog-if triple for this device
* @dev_class_mask: the class mask for this device
*
* This macro is used to create a struct pci_device_id that matches a
* specific PCI class. The vendor, device, subvendor, and subdevice
* fields will be set to PCI_ANY_ID.
*/
#define PCI_DEVICE_CLASS(dev_class, dev_class_mask) \
.class = (dev_class), .class_mask = (dev_class_mask), \
.vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
/**
* PCI_VDEVICE - macro used to describe a specific pci device in short form
* @vend: the vendor name
* @dev: the 16 bit PCI Device ID
*
* This macro is used to create a struct pci_device_id that matches a
* specific PCI device. The subvendor, and subdevice fields will be set
* to PCI_ANY_ID. The macro allows the next field to follow as the device
* private data.
*/
#define PCI_VDEVICE(vend, dev) \
.vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
/**
* struct pci_driver_entry - Matches a driver to its pci_device_id list
* @driver: Driver to use
* @match: List of match records for this driver, terminated by {}
*/
struct pci_driver_entry {
struct driver *driver;
const struct pci_device_id *match;
};
#define U_BOOT_PCI_DEVICE(__name, __match) \
ll_entry_declare(struct pci_driver_entry, __name, pci_driver_entry) = {\
.driver = llsym(struct driver, __name, driver), \
.match = __match, \
}
#endif /* __ASSEMBLY__ */
#endif /* _PCI_H */
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