462 lines
13 KiB
C
462 lines
13 KiB
C
/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _PCI_CORE_H_
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#define _PCI_CORE_H_
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#include <sys/queue.h>
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#include <assert.h>
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#include <stdbool.h>
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#include "types.h"
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#include "pcireg.h"
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#include "log.h"
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#define PCI_BARMAX PCIR_MAX_BAR_0 /* BAR registers in a Type 0 header */
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#define PCI_BDF(b, d, f) (((b & 0xFF) << 8) | ((d & 0x1F) << 3) | ((f & 0x7)))
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#define PCI_EMUL_ECFG_BASE 0xE0000000UL /* 3.5GB */
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#define PCI_EMUL_MEMBASE64 0x100000000UL /* 4GB */
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#define PCI_EMUL_MEMLIMIT64 0x140000000UL /* 5GB */
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/* Currently,only gvt need reserved bar regions,
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* so just hardcode REGION_NUMS=5 here
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*/
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#define REGION_NUMS 5
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struct vmctx;
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struct pci_vdev;
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struct memory_region;
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struct pci_vdev_ops {
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char *class_name; /* Name of device class */
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/* instance creation */
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int (*vdev_init)(struct vmctx *, struct pci_vdev *,
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char *opts);
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/* instance deinit */
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void (*vdev_deinit)(struct vmctx *, struct pci_vdev *,
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char *opts);
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/* ACPI DSDT enumeration */
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void (*vdev_write_dsdt)(struct pci_vdev *);
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/* ops related to physical resources */
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void (*vdev_phys_access)(struct vmctx *ctx, struct pci_vdev *dev);
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/* config space read/write callbacks */
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int (*vdev_cfgwrite)(struct vmctx *ctx, int vcpu,
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struct pci_vdev *pi, int offset,
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int bytes, uint32_t val);
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int (*vdev_cfgread)(struct vmctx *ctx, int vcpu,
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struct pci_vdev *pi, int offset,
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int bytes, uint32_t *retval);
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/* BAR read/write callbacks */
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void (*vdev_barwrite)(struct vmctx *ctx, int vcpu,
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struct pci_vdev *pi, int baridx,
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uint64_t offset, int size, uint64_t value);
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uint64_t (*vdev_barread)(struct vmctx *ctx, int vcpu,
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struct pci_vdev *pi, int baridx,
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uint64_t offset, int size);
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};
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/*
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* Put all PCI instances' addresses into one section named pci_devemu_set
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* so that DM could enumerate and initialize each of them.
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*/
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#define DEFINE_PCI_DEVTYPE(x) DATA_SET(pci_vdev_ops_set, x)
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enum pcibar_type {
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PCIBAR_NONE,
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PCIBAR_IO,
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PCIBAR_MEM32,
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PCIBAR_MEM64,
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PCIBAR_MEMHI64
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};
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struct pcibar {
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enum pcibar_type type; /* io or memory */
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uint64_t size;
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uint64_t addr;
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bool sizing;
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};
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#define PI_NAMESZ 40
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struct msix_table_entry {
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uint64_t addr;
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uint32_t msg_data;
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uint32_t vector_control;
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} __attribute__((packed));
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/*
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* In case the structure is modified to hold extra information, use a define
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* for the size that should be emulated.
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*/
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#define MSIX_TABLE_ENTRY_SIZE 16
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#define MAX_MSIX_TABLE_ENTRIES 2048
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#define PBA_SIZE(msgnum) (roundup2((msgnum), 64) / 8)
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enum lintr_stat {
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IDLE,
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ASSERTED,
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PENDING
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};
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struct pci_vdev {
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struct pci_vdev_ops *dev_ops;
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struct vmctx *vmctx;
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uint8_t bus, slot, func;
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char name[PI_NAMESZ];
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int bar_getsize;
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int prevcap;
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int capend;
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struct {
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int8_t pin;
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enum lintr_stat state;
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int pirq_pin;
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int ioapic_irq;
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pthread_mutex_t lock;
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} lintr;
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struct {
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int enabled;
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uint64_t addr;
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uint64_t msg_data;
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int maxmsgnum;
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} msi;
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struct {
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int enabled;
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int table_bar;
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int pba_bar;
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uint32_t table_offset;
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int table_count;
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uint32_t pba_offset;
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int pba_size;
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int function_mask;
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struct msix_table_entry *table; /* allocated at runtime */
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void *pba_page;
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int pba_page_offset;
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} msix;
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void *arg; /* devemu-private data */
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uint8_t cfgdata[PCI_REGMAX + 1];
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struct pcibar bar[PCI_BARMAX + 1];
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};
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struct gsi_dev {
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/*
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* For PCI devices, use a string "b:d.f" to stand for the device's BDF,
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* such as "00:00.0".
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* For non-PCI devices, use the device's name to stand for the device,
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* such as "timer".
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*/
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char *dev_name;
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uint8_t gsi;
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};
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extern struct gsi_dev gsi_dev_mapping_tables[];
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extern int num_gsi_dev_mapping_tables;
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struct msicap {
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uint8_t capid;
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uint8_t nextptr;
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uint16_t msgctrl;
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uint32_t addrlo;
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uint32_t addrhi;
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uint16_t msgdata;
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} __attribute__((packed));
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static_assert(sizeof(struct msicap) == 14, "compile-time assertion failed");
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struct msixcap {
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uint8_t capid;
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uint8_t nextptr;
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uint16_t msgctrl;
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uint32_t table_info; /* bar index and offset within it */
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uint32_t pba_info; /* bar index and offset within it */
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} __attribute__((packed));
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static_assert(sizeof(struct msixcap) == 12, "compile-time assertion failed");
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struct pciecap {
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uint8_t capid;
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uint8_t nextptr;
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uint16_t pcie_capabilities;
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uint32_t dev_capabilities; /* all devices */
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uint16_t dev_control;
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uint16_t dev_status;
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uint32_t link_capabilities; /* devices with links */
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uint16_t link_control;
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uint16_t link_status;
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uint32_t slot_capabilities; /* ports with slots */
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uint16_t slot_control;
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uint16_t slot_status;
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uint16_t root_control; /* root ports */
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uint16_t root_capabilities;
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uint32_t root_status;
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uint32_t dev_capabilities2; /* all devices */
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uint16_t dev_control2;
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uint16_t dev_status2;
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uint32_t link_capabilities2; /* devices with links */
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uint16_t link_control2;
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uint16_t link_status2;
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uint32_t slot_capabilities2; /* ports with slots */
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uint16_t slot_control2;
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uint16_t slot_status2;
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} __attribute__((packed));
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static_assert(sizeof(struct pciecap) == 60, "compile-time assertion failed");
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struct mmio_rsvd_rgn {
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uint64_t start;
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uint64_t end;
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int idx;
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int bar_type;
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/* if vdev=NULL, it also indicates this mmio_rsvd_rgn is not used */
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struct pci_vdev *vdev;
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};
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extern struct mmio_rsvd_rgn reserved_bar_regions[REGION_NUMS];
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int create_mmio_rsvd_rgn(uint64_t start,
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uint64_t end, int idx, int bar_type, struct pci_vdev *vdev);
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void destory_mmio_rsvd_rgns(struct pci_vdev *vdev);
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typedef void (*pci_lintr_cb)(int b, int s, int pin, int pirq_pin,
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int ioapic_irq, void *arg);
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int init_pci(struct vmctx *ctx);
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void deinit_pci(struct vmctx *ctx);
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void msicap_cfgwrite(struct pci_vdev *pi, int capoff, int offset,
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int bytes, uint32_t val);
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void msixcap_cfgwrite(struct pci_vdev *pi, int capoff, int offset,
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int bytes, uint32_t val);
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void pci_callback(void);
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int pci_emul_alloc_bar(struct pci_vdev *pdi, int idx,
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enum pcibar_type type, uint64_t size);
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int pci_emul_alloc_pbar(struct pci_vdev *pdi, int idx,
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uint64_t hostbase, enum pcibar_type type,
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uint64_t size);
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void pci_emul_free_bar(struct pci_vdev *pdi, int idx);
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void pci_emul_free_bars(struct pci_vdev *pdi);
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int pci_emul_add_capability(struct pci_vdev *dev, u_char *capdata,
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int caplen);
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int pci_emul_find_capability(struct pci_vdev *dev, uint8_t capid,
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int *p_capoff);
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int pci_emul_add_msicap(struct pci_vdev *pi, int msgnum);
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int pci_emul_add_pciecap(struct pci_vdev *pi, int pcie_device_type);
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/**
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* @brief Generate a MSI interrupt to guest
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param index Message data index.
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*
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* @return None
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*/
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void pci_generate_msi(struct pci_vdev *dev, int index);
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/**
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* @brief Generate a MSI-X interrupt to guest
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param index MSIs table entry index.
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*
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* @return None
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*/
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void pci_generate_msix(struct pci_vdev *dev, int index);
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/**
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* @brief Assert INTx pin of virtual PCI device
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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*
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* @return None
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*/
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void pci_lintr_assert(struct pci_vdev *dev);
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/**
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* @brief Deassert INTx pin of virtual PCI device
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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*
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* @return None
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*/
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void pci_lintr_deassert(struct pci_vdev *dev);
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void pci_lintr_request(struct pci_vdev *pi);
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void pci_lintr_release(struct pci_vdev *pi);
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int pci_msi_enabled(struct pci_vdev *pi);
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int pci_msix_enabled(struct pci_vdev *pi);
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int pci_msix_table_bar(struct pci_vdev *pi);
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int pci_msix_pba_bar(struct pci_vdev *pi);
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int pci_msi_maxmsgnum(struct pci_vdev *pi);
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int pci_parse_slot(char *opt);
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int pci_populate_msicap(struct msicap *cap, int msgs, int nextptr);
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int pci_emul_add_msixcap(struct pci_vdev *pi, int msgnum, int barnum);
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int pci_emul_msix_twrite(struct pci_vdev *pi, uint64_t offset, int size,
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uint64_t value);
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uint64_t pci_emul_msix_tread(struct pci_vdev *pi, uint64_t offset, int size);
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int pci_count_lintr(int bus);
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void pci_walk_lintr(int bus, pci_lintr_cb cb, void *arg);
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void pci_write_dsdt(void);
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int pci_bus_configured(int bus);
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int emulate_pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus,
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int slot, int func, int reg, int bytes, int *value);
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int create_gsi_sharing_groups(void);
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void update_pt_info(uint16_t phys_bdf);
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int check_gsi_sharing_violation(void);
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int pciaccess_init(void);
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void pciaccess_cleanup(void);
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int parse_bdf(char *s, int *bus, int *dev, int *func, int base);
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struct pci_vdev *pci_get_vdev_info(int slot);
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/**
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* @brief Set virtual PCI device's configuration space in 1 byte width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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* @param val Value in 1 byte.
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*
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* @return None
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*/
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static inline void
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pci_set_cfgdata8(struct pci_vdev *dev, int offset, uint8_t val)
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{
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if (offset > PCI_REGMAX) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return;
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}
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*(uint8_t *)(dev->cfgdata + offset) = val;
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}
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/**
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* @brief Set virtual PCI device's configuration space in 2 bytes width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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* @param val Value in 2 bytes.
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*
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* @return None
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*/
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static inline void
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pci_set_cfgdata16(struct pci_vdev *dev, int offset, uint16_t val)
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{
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if ((offset > PCI_REGMAX - 1) || (offset & 1) != 0) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return;
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}
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*(uint16_t *)(dev->cfgdata + offset) = val;
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}
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/**
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* @brief Set virtual PCI device's configuration space in 4 bytes width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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* @param val Value in 4 bytes.
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*
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* @return None
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*/
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static inline void
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pci_set_cfgdata32(struct pci_vdev *dev, int offset, uint32_t val)
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{
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if ((offset > PCI_REGMAX - 3) || (offset & 3) != 0) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return;
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}
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*(uint32_t *)(dev->cfgdata + offset) = val;
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}
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/**
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* @brief Get virtual PCI device's configuration space in 1 byte width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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*
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* @return The configuration value in 1 byte.
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*/
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static inline uint8_t
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pci_get_cfgdata8(struct pci_vdev *dev, int offset)
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{
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if (offset > PCI_REGMAX) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return 0xff;
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}
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return (*(uint8_t *)(dev->cfgdata + offset));
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}
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/**
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* @brief Get virtual PCI device's configuration space in 2 byte width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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*
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* @return The configuration value in 2 bytes.
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*/
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static inline uint16_t
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pci_get_cfgdata16(struct pci_vdev *dev, int offset)
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{
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if ((offset > PCI_REGMAX - 1) || (offset & 1) != 0) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return 0xffff;
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}
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return (*(uint16_t *)(dev->cfgdata + offset));
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}
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/**
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* @brief Get virtual PCI device's configuration space in 4 byte width
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*
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* @param dev Pointer to struct pci_vdev representing virtual PCI device.
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* @param offset Offset in configuration space.
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*
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* @return The configuration value in 4 bytes.
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*/
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static inline uint32_t
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pci_get_cfgdata32(struct pci_vdev *dev, int offset)
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{
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if ((offset > PCI_REGMAX - 3) || (offset & 3) != 0) {
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pr_err("%s: out of range of PCI config space!\n", __func__);
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return 0xffffffff;
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}
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return (*(uint32_t *)(dev->cfgdata + offset));
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}
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#endif /* _PCI_CORE_H_ */
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