+++ /dev/null
-/*
- * Copyright (c) 2007, Neocleus Corporation.
- * Copyright (c) 2007, Intel Corporation.
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Alex Novik <alex@neocleus.com>
- * Allen Kay <allen.m.kay@intel.com>
- * Guy Zana <guy@neocleus.com>
- *
- * This file implements direct PCI assignment to a HVM guest
- */
-
-/*
- * Interrupt Disable policy:
- *
- * INTx interrupt:
- * Initialize(register_real_device)
- * Map INTx(xc_physdev_map_pirq):
- * <fail>
- * - Set real Interrupt Disable bit to '1'.
- * - Set machine_irq and assigned_device->machine_irq to '0'.
- * * Don't bind INTx.
- *
- * Bind INTx(xc_domain_bind_pt_pci_irq):
- * <fail>
- * - Set real Interrupt Disable bit to '1'.
- * - Unmap INTx.
- * - Decrement xen_pt_mapped_machine_irq[machine_irq]
- * - Set assigned_device->machine_irq to '0'.
- *
- * Write to Interrupt Disable bit by guest software(xen_pt_cmd_reg_write)
- * Write '0'
- * - Set real bit to '0' if assigned_device->machine_irq isn't '0'.
- *
- * Write '1'
- * - Set real bit to '1'.
- *
- * MSI interrupt:
- * Initialize MSI register(xen_pt_msi_setup, xen_pt_msi_update)
- * Bind MSI(xc_domain_update_msi_irq)
- * <fail>
- * - Unmap MSI.
- * - Set dev->msi->pirq to '-1'.
- *
- * MSI-X interrupt:
- * Initialize MSI-X register(xen_pt_msix_update_one)
- * Bind MSI-X(xc_domain_update_msi_irq)
- * <fail>
- * - Unmap MSI-X.
- * - Set entry->pirq to '-1'.
- */
-
-#include <sys/ioctl.h>
-
-#include "hw/pci/pci.h"
-#include "hw/xen/xen.h"
-#include "hw/xen/xen_backend.h"
-#include "hw/xen_pt.h"
-#include "qemu/range.h"
-#include "exec/address-spaces.h"
-
-#define XEN_PT_NR_IRQS (256)
-static uint8_t xen_pt_mapped_machine_irq[XEN_PT_NR_IRQS] = {0};
-
-void xen_pt_log(const PCIDevice *d, const char *f, ...)
-{
- va_list ap;
-
- va_start(ap, f);
- if (d) {
- fprintf(stderr, "[%02x:%02x.%d] ", pci_bus_num(d->bus),
- PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
- }
- vfprintf(stderr, f, ap);
- va_end(ap);
-}
-
-/* Config Space */
-
-static int xen_pt_pci_config_access_check(PCIDevice *d, uint32_t addr, int len)
-{
- /* check offset range */
- if (addr >= 0xFF) {
- XEN_PT_ERR(d, "Failed to access register with offset exceeding 0xFF. "
- "(addr: 0x%02x, len: %d)\n", addr, len);
- return -1;
- }
-
- /* check read size */
- if ((len != 1) && (len != 2) && (len != 4)) {
- XEN_PT_ERR(d, "Failed to access register with invalid access length. "
- "(addr: 0x%02x, len: %d)\n", addr, len);
- return -1;
- }
-
- /* check offset alignment */
- if (addr & (len - 1)) {
- XEN_PT_ERR(d, "Failed to access register with invalid access size "
- "alignment. (addr: 0x%02x, len: %d)\n", addr, len);
- return -1;
- }
-
- return 0;
-}
-
-int xen_pt_bar_offset_to_index(uint32_t offset)
-{
- int index = 0;
-
- /* check Exp ROM BAR */
- if (offset == PCI_ROM_ADDRESS) {
- return PCI_ROM_SLOT;
- }
-
- /* calculate BAR index */
- index = (offset - PCI_BASE_ADDRESS_0) >> 2;
- if (index >= PCI_NUM_REGIONS) {
- return -1;
- }
-
- return index;
-}
-
-static uint32_t xen_pt_pci_read_config(PCIDevice *d, uint32_t addr, int len)
-{
- XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
- uint32_t val = 0;
- XenPTRegGroup *reg_grp_entry = NULL;
- XenPTReg *reg_entry = NULL;
- int rc = 0;
- int emul_len = 0;
- uint32_t find_addr = addr;
-
- if (xen_pt_pci_config_access_check(d, addr, len)) {
- goto exit;
- }
-
- /* find register group entry */
- reg_grp_entry = xen_pt_find_reg_grp(s, addr);
- if (reg_grp_entry) {
- /* check 0-Hardwired register group */
- if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
- /* no need to emulate, just return 0 */
- val = 0;
- goto exit;
- }
- }
-
- /* read I/O device register value */
- rc = xen_host_pci_get_block(&s->real_device, addr, (uint8_t *)&val, len);
- if (rc < 0) {
- XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
- memset(&val, 0xff, len);
- }
-
- /* just return the I/O device register value for
- * passthrough type register group */
- if (reg_grp_entry == NULL) {
- goto exit;
- }
-
- /* adjust the read value to appropriate CFC-CFF window */
- val <<= (addr & 3) << 3;
- emul_len = len;
-
- /* loop around the guest requested size */
- while (emul_len > 0) {
- /* find register entry to be emulated */
- reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
- if (reg_entry) {
- XenPTRegInfo *reg = reg_entry->reg;
- uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
- uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
- uint8_t *ptr_val = NULL;
-
- valid_mask <<= (find_addr - real_offset) << 3;
- ptr_val = (uint8_t *)&val + (real_offset & 3);
-
- /* do emulation based on register size */
- switch (reg->size) {
- case 1:
- if (reg->u.b.read) {
- rc = reg->u.b.read(s, reg_entry, ptr_val, valid_mask);
- }
- break;
- case 2:
- if (reg->u.w.read) {
- rc = reg->u.w.read(s, reg_entry,
- (uint16_t *)ptr_val, valid_mask);
- }
- break;
- case 4:
- if (reg->u.dw.read) {
- rc = reg->u.dw.read(s, reg_entry,
- (uint32_t *)ptr_val, valid_mask);
- }
- break;
- }
-
- if (rc < 0) {
- xen_shutdown_fatal_error("Internal error: Invalid read "
- "emulation. (%s, rc: %d)\n",
- __func__, rc);
- return 0;
- }
-
- /* calculate next address to find */
- emul_len -= reg->size;
- if (emul_len > 0) {
- find_addr = real_offset + reg->size;
- }
- } else {
- /* nothing to do with passthrough type register,
- * continue to find next byte */
- emul_len--;
- find_addr++;
- }
- }
-
- /* need to shift back before returning them to pci bus emulator */
- val >>= ((addr & 3) << 3);
-
-exit:
- XEN_PT_LOG_CONFIG(d, addr, val, len);
- return val;
-}
-
-static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
- uint32_t val, int len)
-{
- XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
- int index = 0;
- XenPTRegGroup *reg_grp_entry = NULL;
- int rc = 0;
- uint32_t read_val = 0;
- int emul_len = 0;
- XenPTReg *reg_entry = NULL;
- uint32_t find_addr = addr;
- XenPTRegInfo *reg = NULL;
-
- if (xen_pt_pci_config_access_check(d, addr, len)) {
- return;
- }
-
- XEN_PT_LOG_CONFIG(d, addr, val, len);
-
- /* check unused BAR register */
- index = xen_pt_bar_offset_to_index(addr);
- if ((index >= 0) && (val > 0 && val < XEN_PT_BAR_ALLF) &&
- (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED)) {
- XEN_PT_WARN(d, "Guest attempt to set address to unused Base Address "
- "Register. (addr: 0x%02x, len: %d)\n", addr, len);
- }
-
- /* find register group entry */
- reg_grp_entry = xen_pt_find_reg_grp(s, addr);
- if (reg_grp_entry) {
- /* check 0-Hardwired register group */
- if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
- /* ignore silently */
- XEN_PT_WARN(d, "Access to 0-Hardwired register. "
- "(addr: 0x%02x, len: %d)\n", addr, len);
- return;
- }
- }
-
- rc = xen_host_pci_get_block(&s->real_device, addr,
- (uint8_t *)&read_val, len);
- if (rc < 0) {
- XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
- memset(&read_val, 0xff, len);
- }
-
- /* pass directly to the real device for passthrough type register group */
- if (reg_grp_entry == NULL) {
- goto out;
- }
-
- memory_region_transaction_begin();
- pci_default_write_config(d, addr, val, len);
-
- /* adjust the read and write value to appropriate CFC-CFF window */
- read_val <<= (addr & 3) << 3;
- val <<= (addr & 3) << 3;
- emul_len = len;
-
- /* loop around the guest requested size */
- while (emul_len > 0) {
- /* find register entry to be emulated */
- reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
- if (reg_entry) {
- reg = reg_entry->reg;
- uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
- uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
- uint8_t *ptr_val = NULL;
-
- valid_mask <<= (find_addr - real_offset) << 3;
- ptr_val = (uint8_t *)&val + (real_offset & 3);
-
- /* do emulation based on register size */
- switch (reg->size) {
- case 1:
- if (reg->u.b.write) {
- rc = reg->u.b.write(s, reg_entry, ptr_val,
- read_val >> ((real_offset & 3) << 3),
- valid_mask);
- }
- break;
- case 2:
- if (reg->u.w.write) {
- rc = reg->u.w.write(s, reg_entry, (uint16_t *)ptr_val,
- (read_val >> ((real_offset & 3) << 3)),
- valid_mask);
- }
- break;
- case 4:
- if (reg->u.dw.write) {
- rc = reg->u.dw.write(s, reg_entry, (uint32_t *)ptr_val,
- (read_val >> ((real_offset & 3) << 3)),
- valid_mask);
- }
- break;
- }
-
- if (rc < 0) {
- xen_shutdown_fatal_error("Internal error: Invalid write"
- " emulation. (%s, rc: %d)\n",
- __func__, rc);
- return;
- }
-
- /* calculate next address to find */
- emul_len -= reg->size;
- if (emul_len > 0) {
- find_addr = real_offset + reg->size;
- }
- } else {
- /* nothing to do with passthrough type register,
- * continue to find next byte */
- emul_len--;
- find_addr++;
- }
- }
-
- /* need to shift back before passing them to xen_host_pci_device */
- val >>= (addr & 3) << 3;
-
- memory_region_transaction_commit();
-
-out:
- if (!(reg && reg->no_wb)) {
- /* unknown regs are passed through */
- rc = xen_host_pci_set_block(&s->real_device, addr,
- (uint8_t *)&val, len);
-
- if (rc < 0) {
- XEN_PT_ERR(d, "pci_write_block failed. return value: %d.\n", rc);
- }
- }
-}
-
-/* register regions */
-
-static uint64_t xen_pt_bar_read(void *o, hwaddr addr,
- unsigned size)
-{
- PCIDevice *d = o;
- /* if this function is called, that probably means that there is a
- * misconfiguration of the IOMMU. */
- XEN_PT_ERR(d, "Should not read BAR through QEMU. @0x"TARGET_FMT_plx"\n",
- addr);
- return 0;
-}
-static void xen_pt_bar_write(void *o, hwaddr addr, uint64_t val,
- unsigned size)
-{
- PCIDevice *d = o;
- /* Same comment as xen_pt_bar_read function */
- XEN_PT_ERR(d, "Should not write BAR through QEMU. @0x"TARGET_FMT_plx"\n",
- addr);
-}
-
-static const MemoryRegionOps ops = {
- .endianness = DEVICE_NATIVE_ENDIAN,
- .read = xen_pt_bar_read,
- .write = xen_pt_bar_write,
-};
-
-static int xen_pt_register_regions(XenPCIPassthroughState *s)
-{
- int i = 0;
- XenHostPCIDevice *d = &s->real_device;
-
- /* Register PIO/MMIO BARs */
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- XenHostPCIIORegion *r = &d->io_regions[i];
- uint8_t type;
-
- if (r->base_addr == 0 || r->size == 0) {
- continue;
- }
-
- s->bases[i].access.u = r->base_addr;
-
- if (r->type & XEN_HOST_PCI_REGION_TYPE_IO) {
- type = PCI_BASE_ADDRESS_SPACE_IO;
- } else {
- type = PCI_BASE_ADDRESS_SPACE_MEMORY;
- if (r->type & XEN_HOST_PCI_REGION_TYPE_PREFETCH) {
- type |= PCI_BASE_ADDRESS_MEM_PREFETCH;
- }
- if (r->type & XEN_HOST_PCI_REGION_TYPE_MEM_64) {
- type |= PCI_BASE_ADDRESS_MEM_TYPE_64;
- }
- }
-
- memory_region_init_io(&s->bar[i], &ops, &s->dev,
- "xen-pci-pt-bar", r->size);
- pci_register_bar(&s->dev, i, type, &s->bar[i]);
-
- XEN_PT_LOG(&s->dev, "IO region %i registered (size=0x%lx"PRIx64
- " base_addr=0x%lx"PRIx64" type: %#x)\n",
- i, r->size, r->base_addr, type);
- }
-
- /* Register expansion ROM address */
- if (d->rom.base_addr && d->rom.size) {
- uint32_t bar_data = 0;
-
- /* Re-set BAR reported by OS, otherwise ROM can't be read. */
- if (xen_host_pci_get_long(d, PCI_ROM_ADDRESS, &bar_data)) {
- return 0;
- }
- if ((bar_data & PCI_ROM_ADDRESS_MASK) == 0) {
- bar_data |= d->rom.base_addr & PCI_ROM_ADDRESS_MASK;
- xen_host_pci_set_long(d, PCI_ROM_ADDRESS, bar_data);
- }
-
- s->bases[PCI_ROM_SLOT].access.maddr = d->rom.base_addr;
-
- memory_region_init_rom_device(&s->rom, NULL, NULL,
- "xen-pci-pt-rom", d->rom.size);
- pci_register_bar(&s->dev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_MEM_PREFETCH,
- &s->rom);
-
- XEN_PT_LOG(&s->dev, "Expansion ROM registered (size=0x%08"PRIx64
- " base_addr=0x%08"PRIx64")\n",
- d->rom.size, d->rom.base_addr);
- }
-
- return 0;
-}
-
-static void xen_pt_unregister_regions(XenPCIPassthroughState *s)
-{
- XenHostPCIDevice *d = &s->real_device;
- int i;
-
- for (i = 0; i < PCI_NUM_REGIONS - 1; i++) {
- XenHostPCIIORegion *r = &d->io_regions[i];
-
- if (r->base_addr == 0 || r->size == 0) {
- continue;
- }
-
- memory_region_destroy(&s->bar[i]);
- }
- if (d->rom.base_addr && d->rom.size) {
- memory_region_destroy(&s->rom);
- }
-}
-
-/* region mapping */
-
-static int xen_pt_bar_from_region(XenPCIPassthroughState *s, MemoryRegion *mr)
-{
- int i = 0;
-
- for (i = 0; i < PCI_NUM_REGIONS - 1; i++) {
- if (mr == &s->bar[i]) {
- return i;
- }
- }
- if (mr == &s->rom) {
- return PCI_ROM_SLOT;
- }
- return -1;
-}
-
-/*
- * This function checks if an io_region overlaps an io_region from another
- * device. The io_region to check is provided with (addr, size and type)
- * A callback can be provided and will be called for every region that is
- * overlapped.
- * The return value indicates if the region is overlappsed */
-struct CheckBarArgs {
- XenPCIPassthroughState *s;
- pcibus_t addr;
- pcibus_t size;
- uint8_t type;
- bool rc;
-};
-static void xen_pt_check_bar_overlap(PCIBus *bus, PCIDevice *d, void *opaque)
-{
- struct CheckBarArgs *arg = opaque;
- XenPCIPassthroughState *s = arg->s;
- uint8_t type = arg->type;
- int i;
-
- if (d->devfn == s->dev.devfn) {
- return;
- }
-
- /* xxx: This ignores bridges. */
- for (i = 0; i < PCI_NUM_REGIONS; i++) {
- const PCIIORegion *r = &d->io_regions[i];
-
- if (!r->size) {
- continue;
- }
- if ((type & PCI_BASE_ADDRESS_SPACE_IO)
- != (r->type & PCI_BASE_ADDRESS_SPACE_IO)) {
- continue;
- }
-
- if (ranges_overlap(arg->addr, arg->size, r->addr, r->size)) {
- XEN_PT_WARN(&s->dev,
- "Overlapped to device [%02x:%02x.%d] Region: %i"
- " (addr: %#"FMT_PCIBUS", len: %#"FMT_PCIBUS")\n",
- pci_bus_num(bus), PCI_SLOT(d->devfn),
- PCI_FUNC(d->devfn), i, r->addr, r->size);
- arg->rc = true;
- }
- }
-}
-
-static void xen_pt_region_update(XenPCIPassthroughState *s,
- MemoryRegionSection *sec, bool adding)
-{
- PCIDevice *d = &s->dev;
- MemoryRegion *mr = sec->mr;
- int bar = -1;
- int rc;
- int op = adding ? DPCI_ADD_MAPPING : DPCI_REMOVE_MAPPING;
- struct CheckBarArgs args = {
- .s = s,
- .addr = sec->offset_within_address_space,
- .size = sec->size,
- .rc = false,
- };
-
- bar = xen_pt_bar_from_region(s, mr);
- if (bar == -1 && (!s->msix || &s->msix->mmio != mr)) {
- return;
- }
-
- if (s->msix && &s->msix->mmio == mr) {
- if (adding) {
- s->msix->mmio_base_addr = sec->offset_within_address_space;
- rc = xen_pt_msix_update_remap(s, s->msix->bar_index);
- }
- return;
- }
-
- args.type = d->io_regions[bar].type;
- pci_for_each_device(d->bus, pci_bus_num(d->bus),
- xen_pt_check_bar_overlap, &args);
- if (args.rc) {
- XEN_PT_WARN(d, "Region: %d (addr: %#"FMT_PCIBUS
- ", len: %#"FMT_PCIBUS") is overlapped.\n",
- bar, sec->offset_within_address_space, sec->size);
- }
-
- if (d->io_regions[bar].type & PCI_BASE_ADDRESS_SPACE_IO) {
- uint32_t guest_port = sec->offset_within_address_space;
- uint32_t machine_port = s->bases[bar].access.pio_base;
- uint32_t size = sec->size;
- rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
- guest_port, machine_port, size,
- op);
- if (rc) {
- XEN_PT_ERR(d, "%s ioport mapping failed! (rc: %i)\n",
- adding ? "create new" : "remove old", rc);
- }
- } else {
- pcibus_t guest_addr = sec->offset_within_address_space;
- pcibus_t machine_addr = s->bases[bar].access.maddr
- + sec->offset_within_region;
- pcibus_t size = sec->size;
- rc = xc_domain_memory_mapping(xen_xc, xen_domid,
- XEN_PFN(guest_addr + XC_PAGE_SIZE - 1),
- XEN_PFN(machine_addr + XC_PAGE_SIZE - 1),
- XEN_PFN(size + XC_PAGE_SIZE - 1),
- op);
- if (rc) {
- XEN_PT_ERR(d, "%s mem mapping failed! (rc: %i)\n",
- adding ? "create new" : "remove old", rc);
- }
- }
-}
-
-static void xen_pt_region_add(MemoryListener *l, MemoryRegionSection *sec)
-{
- XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
- memory_listener);
-
- xen_pt_region_update(s, sec, true);
-}
-
-static void xen_pt_region_del(MemoryListener *l, MemoryRegionSection *sec)
-{
- XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
- memory_listener);
-
- xen_pt_region_update(s, sec, false);
-}
-
-static void xen_pt_io_region_add(MemoryListener *l, MemoryRegionSection *sec)
-{
- XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
- io_listener);
-
- xen_pt_region_update(s, sec, true);
-}
-
-static void xen_pt_io_region_del(MemoryListener *l, MemoryRegionSection *sec)
-{
- XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
- io_listener);
-
- xen_pt_region_update(s, sec, false);
-}
-
-static const MemoryListener xen_pt_memory_listener = {
- .region_add = xen_pt_region_add,
- .region_del = xen_pt_region_del,
- .priority = 10,
-};
-
-static const MemoryListener xen_pt_io_listener = {
- .region_add = xen_pt_io_region_add,
- .region_del = xen_pt_io_region_del,
- .priority = 10,
-};
-
-/* init */
-
-static int xen_pt_initfn(PCIDevice *d)
-{
- XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
- int rc = 0;
- uint8_t machine_irq = 0;
- int pirq = XEN_PT_UNASSIGNED_PIRQ;
-
- /* register real device */
- XEN_PT_LOG(d, "Assigning real physical device %02x:%02x.%d"
- " to devfn %#x\n",
- s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function,
- s->dev.devfn);
-
- rc = xen_host_pci_device_get(&s->real_device,
- s->hostaddr.domain, s->hostaddr.bus,
- s->hostaddr.slot, s->hostaddr.function);
- if (rc) {
- XEN_PT_ERR(d, "Failed to \"open\" the real pci device. rc: %i\n", rc);
- return -1;
- }
-
- s->is_virtfn = s->real_device.is_virtfn;
- if (s->is_virtfn) {
- XEN_PT_LOG(d, "%04x:%02x:%02x.%d is a SR-IOV Virtual Function\n",
- s->real_device.domain, s->real_device.bus,
- s->real_device.dev, s->real_device.func);
- }
-
- /* Initialize virtualized PCI configuration (Extended 256 Bytes) */
- if (xen_host_pci_get_block(&s->real_device, 0, d->config,
- PCI_CONFIG_SPACE_SIZE) == -1) {
- xen_host_pci_device_put(&s->real_device);
- return -1;
- }
-
- s->memory_listener = xen_pt_memory_listener;
- s->io_listener = xen_pt_io_listener;
-
- /* Handle real device's MMIO/PIO BARs */
- xen_pt_register_regions(s);
-
- /* reinitialize each config register to be emulated */
- if (xen_pt_config_init(s)) {
- XEN_PT_ERR(d, "PCI Config space initialisation failed.\n");
- xen_host_pci_device_put(&s->real_device);
- return -1;
- }
-
- /* Bind interrupt */
- if (!s->dev.config[PCI_INTERRUPT_PIN]) {
- XEN_PT_LOG(d, "no pin interrupt\n");
- goto out;
- }
-
- machine_irq = s->real_device.irq;
- rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq);
-
- if (rc < 0) {
- XEN_PT_ERR(d, "Mapping machine irq %u to pirq %i failed, (rc: %d)\n",
- machine_irq, pirq, rc);
-
- /* Disable PCI intx assertion (turn on bit10 of devctl) */
- xen_host_pci_set_word(&s->real_device,
- PCI_COMMAND,
- pci_get_word(s->dev.config + PCI_COMMAND)
- | PCI_COMMAND_INTX_DISABLE);
- machine_irq = 0;
- s->machine_irq = 0;
- } else {
- machine_irq = pirq;
- s->machine_irq = pirq;
- xen_pt_mapped_machine_irq[machine_irq]++;
- }
-
- /* bind machine_irq to device */
- if (machine_irq != 0) {
- uint8_t e_intx = xen_pt_pci_intx(s);
-
- rc = xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, machine_irq,
- pci_bus_num(d->bus),
- PCI_SLOT(d->devfn),
- e_intx);
- if (rc < 0) {
- XEN_PT_ERR(d, "Binding of interrupt %i failed! (rc: %d)\n",
- e_intx, rc);
-
- /* Disable PCI intx assertion (turn on bit10 of devctl) */
- xen_host_pci_set_word(&s->real_device, PCI_COMMAND,
- *(uint16_t *)(&s->dev.config[PCI_COMMAND])
- | PCI_COMMAND_INTX_DISABLE);
- xen_pt_mapped_machine_irq[machine_irq]--;
-
- if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
- if (xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq)) {
- XEN_PT_ERR(d, "Unmapping of machine interrupt %i failed!"
- " (rc: %d)\n", machine_irq, rc);
- }
- }
- s->machine_irq = 0;
- }
- }
-
-out:
- memory_listener_register(&s->memory_listener, &address_space_memory);
- memory_listener_register(&s->io_listener, &address_space_io);
- XEN_PT_LOG(d, "Real physical device %02x:%02x.%d registered successfuly!\n",
- s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function);
-
- return 0;
-}
-
-static void xen_pt_unregister_device(PCIDevice *d)
-{
- XenPCIPassthroughState *s = DO_UPCAST(XenPCIPassthroughState, dev, d);
- uint8_t machine_irq = s->machine_irq;
- uint8_t intx = xen_pt_pci_intx(s);
- int rc;
-
- if (machine_irq) {
- rc = xc_domain_unbind_pt_irq(xen_xc, xen_domid, machine_irq,
- PT_IRQ_TYPE_PCI,
- pci_bus_num(d->bus),
- PCI_SLOT(s->dev.devfn),
- intx,
- 0 /* isa_irq */);
- if (rc < 0) {
- XEN_PT_ERR(d, "unbinding of interrupt INT%c failed."
- " (machine irq: %i, rc: %d)"
- " But bravely continuing on..\n",
- 'a' + intx, machine_irq, rc);
- }
- }
-
- if (s->msi) {
- xen_pt_msi_disable(s);
- }
- if (s->msix) {
- xen_pt_msix_disable(s);
- }
-
- if (machine_irq) {
- xen_pt_mapped_machine_irq[machine_irq]--;
-
- if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
- rc = xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq);
-
- if (rc < 0) {
- XEN_PT_ERR(d, "unmapping of interrupt %i failed. (rc: %d)"
- " But bravely continuing on..\n",
- machine_irq, rc);
- }
- }
- }
-
- /* delete all emulated config registers */
- xen_pt_config_delete(s);
-
- xen_pt_unregister_regions(s);
- memory_listener_unregister(&s->memory_listener);
- memory_listener_unregister(&s->io_listener);
-
- xen_host_pci_device_put(&s->real_device);
-}
-
-static Property xen_pci_passthrough_properties[] = {
- DEFINE_PROP_PCI_HOST_DEVADDR("hostaddr", XenPCIPassthroughState, hostaddr),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
-
- k->init = xen_pt_initfn;
- k->exit = xen_pt_unregister_device;
- k->config_read = xen_pt_pci_read_config;
- k->config_write = xen_pt_pci_write_config;
- dc->desc = "Assign an host PCI device with Xen";
- dc->props = xen_pci_passthrough_properties;
-};
-
-static const TypeInfo xen_pci_passthrough_info = {
- .name = "xen-pci-passthrough",
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(XenPCIPassthroughState),
- .class_init = xen_pci_passthrough_class_init,
-};
-
-static void xen_pci_passthrough_register_types(void)
-{
- type_register_static(&xen_pci_passthrough_info);
-}
-
-type_init(xen_pci_passthrough_register_types)
projects / qemu.git / blobdiff