diff options
Diffstat (limited to 'hw/pci')
| -rw-r--r-- | hw/pci/meson.build | 1 | ||||
| -rw-r--r-- | hw/pci/pci.c | 104 | ||||
| -rw-r--r-- | hw/pci/pcie.c | 16 | ||||
| -rw-r--r-- | hw/pci/pcie_sriov.c | 302 | ||||
| -rw-r--r-- | hw/pci/trace-events | 5 |
5 files changed, 403 insertions, 25 deletions
diff --git a/hw/pci/meson.build b/hw/pci/meson.build index 5c4bbac817..bcc9c75919 100644 --- a/hw/pci/meson.build +++ b/hw/pci/meson.build @@ -5,6 +5,7 @@ pci_ss.add(files( 'pci.c', 'pci_bridge.c', 'pci_host.c', + 'pcie_sriov.c', 'shpc.c', 'slotid_cap.c' )) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 5d30f9ca60..5cb1232e27 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -239,6 +239,9 @@ int pci_bar(PCIDevice *d, int reg) { uint8_t type; + /* PCIe virtual functions do not have their own BARs */ + assert(!pci_is_vf(d)); + if (reg != PCI_ROM_SLOT) return PCI_BASE_ADDRESS_0 + reg * 4; @@ -304,10 +307,30 @@ void pci_device_deassert_intx(PCIDevice *dev) } } -static void pci_do_device_reset(PCIDevice *dev) +static void pci_reset_regions(PCIDevice *dev) { int r; + if (pci_is_vf(dev)) { + return; + } + + for (r = 0; r < PCI_NUM_REGIONS; ++r) { + PCIIORegion *region = &dev->io_regions[r]; + if (!region->size) { + continue; + } + if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && + region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { + pci_set_quad(dev->config + pci_bar(dev, r), region->type); + } else { + pci_set_long(dev->config + pci_bar(dev, r), region->type); + } + } +} + +static void pci_do_device_reset(PCIDevice *dev) +{ pci_device_deassert_intx(dev); assert(dev->irq_state == 0); @@ -323,19 +346,7 @@ static void pci_do_device_reset(PCIDevice *dev) pci_get_word(dev->wmask + PCI_INTERRUPT_LINE) | pci_get_word(dev->w1cmask + PCI_INTERRUPT_LINE)); dev->config[PCI_CACHE_LINE_SIZE] = 0x0; - for (r = 0; r < PCI_NUM_REGIONS; ++r) { - PCIIORegion *region = &dev->io_regions[r]; - if (!region->size) { - continue; - } - - if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && - region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { - pci_set_quad(dev->config + pci_bar(dev, r), region->type); - } else { - pci_set_long(dev->config + pci_bar(dev, r), region->type); - } - } + pci_reset_regions(dev); pci_update_mappings(dev); msi_reset(dev); @@ -885,6 +896,16 @@ static void pci_init_multifunction(PCIBus *bus, PCIDevice *dev, Error **errp) } /* + * With SR/IOV and ARI, a device at function 0 need not be a multifunction + * device, as it may just be a VF that ended up with function 0 in + * the legacy PCI interpretation. Avoid failing in such cases: + */ + if (pci_is_vf(dev) && + dev->exp.sriov_vf.pf->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { + return; + } + + /* * multifunction bit is interpreted in two ways as follows. * - all functions must set the bit to 1. * Example: Intel X53 @@ -1078,11 +1099,12 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, return NULL; } else if (!pci_bus_devfn_available(bus, devfn)) { error_setg(errp, "PCI: slot %d function %d not available for %s," - " in use by %s", + " in use by %s,id=%s", PCI_SLOT(devfn), PCI_FUNC(devfn), name, - bus->devices[devfn]->name); + bus->devices[devfn]->name, bus->devices[devfn]->qdev.id); return NULL; } else if (dev->hotplugged && + !pci_is_vf(pci_dev) && pci_get_function_0(pci_dev)) { error_setg(errp, "PCI: slot %d function 0 already occupied by %s," " new func %s cannot be exposed to guest.", @@ -1191,6 +1213,7 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num, pcibus_t size = memory_region_size(memory); uint8_t hdr_type; + assert(!pci_is_vf(pci_dev)); /* VFs must use pcie_sriov_vf_register_bar */ assert(region_num >= 0); assert(region_num < PCI_NUM_REGIONS); assert(is_power_of_2(size)); @@ -1294,11 +1317,45 @@ pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) return pci_dev->io_regions[region_num].addr; } -static pcibus_t pci_bar_address(PCIDevice *d, - int reg, uint8_t type, pcibus_t size) +static pcibus_t pci_config_get_bar_addr(PCIDevice *d, int reg, + uint8_t type, pcibus_t size) +{ + pcibus_t new_addr; + if (!pci_is_vf(d)) { + int bar = pci_bar(d, reg); + if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { + new_addr = pci_get_quad(d->config + bar); + } else { + new_addr = pci_get_long(d->config + bar); + } + } else { + PCIDevice *pf = d->exp.sriov_vf.pf; + uint16_t sriov_cap = pf->exp.sriov_cap; + int bar = sriov_cap + PCI_SRIOV_BAR + reg * 4; + uint16_t vf_offset = + pci_get_word(pf->config + sriov_cap + PCI_SRIOV_VF_OFFSET); + uint16_t vf_stride = + pci_get_word(pf->config + sriov_cap + PCI_SRIOV_VF_STRIDE); + uint32_t vf_num = (d->devfn - (pf->devfn + vf_offset)) / vf_stride; + + if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { + new_addr = pci_get_quad(pf->config + bar); + } else { + new_addr = pci_get_long(pf->config + bar); + } + new_addr += vf_num * size; + } + /* The ROM slot has a specific enable bit, keep it intact */ + if (reg != PCI_ROM_SLOT) { + new_addr &= ~(size - 1); + } + return new_addr; +} + +pcibus_t pci_bar_address(PCIDevice *d, + int reg, uint8_t type, pcibus_t size) { pcibus_t new_addr, last_addr; - int bar = pci_bar(d, reg); uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); Object *machine = qdev_get_machine(); ObjectClass *oc = object_get_class(machine); @@ -1309,7 +1366,7 @@ static pcibus_t pci_bar_address(PCIDevice *d, if (!(cmd & PCI_COMMAND_IO)) { return PCI_BAR_UNMAPPED; } - new_addr = pci_get_long(d->config + bar) & ~(size - 1); + new_addr = pci_config_get_bar_addr(d, reg, type, size); last_addr = new_addr + size - 1; /* Check if 32 bit BAR wraps around explicitly. * TODO: make priorities correct and remove this work around. @@ -1324,11 +1381,7 @@ static pcibus_t pci_bar_address(PCIDevice *d, if (!(cmd & PCI_COMMAND_MEMORY)) { return PCI_BAR_UNMAPPED; } - if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { - new_addr = pci_get_quad(d->config + bar); - } else { - new_addr = pci_get_long(d->config + bar); - } + new_addr = pci_config_get_bar_addr(d, reg, type, size); /* the ROM slot has a specific enable bit */ if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { return PCI_BAR_UNMAPPED; @@ -1473,6 +1526,7 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val_in, int msi_write_config(d, addr, val_in, l); msix_write_config(d, addr, val_in, l); + pcie_sriov_config_write(d, addr, val_in, l); } /***********************************************************/ diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index d7d73a31e4..67a5d67372 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -366,6 +366,17 @@ static void hotplug_event_clear(PCIDevice *dev) } } +void pcie_cap_slot_enable_power(PCIDevice *dev) +{ + uint8_t *exp_cap = dev->config + dev->exp.exp_cap; + uint32_t sltcap = pci_get_long(exp_cap + PCI_EXP_SLTCAP); + + if (sltcap & PCI_EXP_SLTCAP_PCP) { + pci_set_word_by_mask(exp_cap + PCI_EXP_SLTCTL, + PCI_EXP_SLTCTL_PCC, PCI_EXP_SLTCTL_PWR_ON); + } +} + static void pcie_set_power_device(PCIBus *bus, PCIDevice *dev, void *opaque) { bool *power = opaque; @@ -446,6 +457,11 @@ void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, PCIDevice *pci_dev = PCI_DEVICE(dev); uint32_t lnkcap = pci_get_long(exp_cap + PCI_EXP_LNKCAP); + if (pci_is_vf(pci_dev)) { + /* Virtual function cannot be physically disconnected */ + return; + } + /* Don't send event when device is enabled during qemu machine creation: * it is present on boot, no hotplug event is necessary. We do send an * event when the device is disabled later. */ diff --git a/hw/pci/pcie_sriov.c b/hw/pci/pcie_sriov.c new file mode 100644 index 0000000000..87abad6ac8 --- /dev/null +++ b/hw/pci/pcie_sriov.c @@ -0,0 +1,302 @@ +/* + * pcie_sriov.c: + * + * Implementation of SR/IOV emulation support. + * + * Copyright (c) 2015-2017 Knut Omang <knut.omang@oracle.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "hw/pci/pci.h" +#include "hw/pci/pcie.h" +#include "hw/pci/pci_bus.h" +#include "hw/qdev-properties.h" +#include "qemu/error-report.h" +#include "qemu/range.h" +#include "qapi/error.h" +#include "trace.h" + +static PCIDevice *register_vf(PCIDevice *pf, int devfn, + const char *name, uint16_t vf_num); +static void unregister_vfs(PCIDevice *dev); + +void pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset, + const char *vfname, uint16_t vf_dev_id, + uint16_t init_vfs, uint16_t total_vfs, + uint16_t vf_offset, uint16_t vf_stride) +{ + uint8_t *cfg = dev->config + offset; + uint8_t *wmask; + + pcie_add_capability(dev, PCI_EXT_CAP_ID_SRIOV, 1, + offset, PCI_EXT_CAP_SRIOV_SIZEOF); + dev->exp.sriov_cap = offset; + dev->exp.sriov_pf.num_vfs = 0; + dev->exp.sriov_pf.vfname = g_strdup(vfname); + dev->exp.sriov_pf.vf = NULL; + + pci_set_word(cfg + PCI_SRIOV_VF_OFFSET, vf_offset); + pci_set_word(cfg + PCI_SRIOV_VF_STRIDE, vf_stride); + + /* + * Mandatory page sizes to support. + * Device implementations can call pcie_sriov_pf_add_sup_pgsize() + * to set more bits: + */ + pci_set_word(cfg + PCI_SRIOV_SUP_PGSIZE, SRIOV_SUP_PGSIZE_MINREQ); + + /* + * Default is to use 4K pages, software can modify it + * to any of the supported bits + */ + pci_set_word(cfg + PCI_SRIOV_SYS_PGSIZE, 0x1); + + /* Set up device ID and initial/total number of VFs available */ + pci_set_word(cfg + PCI_SRIOV_VF_DID, vf_dev_id); + pci_set_word(cfg + PCI_SRIOV_INITIAL_VF, init_vfs); + pci_set_word(cfg + PCI_SRIOV_TOTAL_VF, total_vfs); + pci_set_word(cfg + PCI_SRIOV_NUM_VF, 0); + + /* Write enable control bits */ + wmask = dev->wmask + offset; + pci_set_word(wmask + PCI_SRIOV_CTRL, + PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE | PCI_SRIOV_CTRL_ARI); + pci_set_word(wmask + PCI_SRIOV_NUM_VF, 0xffff); + pci_set_word(wmask + PCI_SRIOV_SYS_PGSIZE, 0x553); + + qdev_prop_set_bit(&dev->qdev, "multifunction", true); +} + +void pcie_sriov_pf_exit(PCIDevice *dev) +{ + unregister_vfs(dev); + g_free((char *)dev->exp.sriov_pf.vfname); + dev->exp.sriov_pf.vfname = NULL; +} + +void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num, + uint8_t type, dma_addr_t size) +{ + uint32_t addr; + uint64_t wmask; + uint16_t sriov_cap = dev->exp.sriov_cap; + + assert(sriov_cap > 0); + assert(region_num >= 0); + assert(region_num < PCI_NUM_REGIONS); + assert(region_num != PCI_ROM_SLOT); + + wmask = ~(size - 1); + addr = sriov_cap + PCI_SRIOV_BAR + region_num * 4; + + pci_set_long(dev->config + addr, type); + if (!(type & PCI_BASE_ADDRESS_SPACE_IO) && + type & PCI_BASE_ADDRESS_MEM_TYPE_64) { + pci_set_quad(dev->wmask + addr, wmask); + pci_set_quad(dev->cmask + addr, ~0ULL); + } else { + pci_set_long(dev->wmask + addr, wmask & 0xffffffff); + pci_set_long(dev->cmask + addr, 0xffffffff); + } + dev->exp.sriov_pf.vf_bar_type[region_num] = type; +} + +void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num, + MemoryRegion *memory) +{ + PCIIORegion *r; + PCIBus *bus = pci_get_bus(dev); + uint8_t type; + pcibus_t size = memory_region_size(memory); + + assert(pci_is_vf(dev)); /* PFs must use pci_register_bar */ + assert(region_num >= 0); + assert(region_num < PCI_NUM_REGIONS); + type = dev->exp.sriov_vf.pf->exp.sriov_pf.vf_bar_type[region_num]; + + if (!is_power_of_2(size)) { + error_report("%s: PCI region size must be a power" + " of two - type=0x%x, size=0x%"FMT_PCIBUS, + __func__, type, size); + exit(1); + } + + r = &dev->io_regions[region_num]; + r->memory = memory; + r->address_space = + type & PCI_BASE_ADDRESS_SPACE_IO + ? bus->address_space_io + : bus->address_space_mem; + r->size = size; + r->type = type; + + r->addr = pci_bar_address(dev, region_num, r->type, r->size); + if (r->addr != PCI_BAR_UNMAPPED) { + memory_region_add_subregion_overlap(r->address_space, + r->addr, r->memory, 1); + } +} + +static PCIDevice *register_vf(PCIDevice *pf, int devfn, const char *name, + uint16_t vf_num) +{ + PCIDevice *dev = pci_new(devfn, name); + dev->exp.sriov_vf.pf = pf; + dev->exp.sriov_vf.vf_number = vf_num; + PCIBus *bus = pci_get_bus(pf); + Error *local_err = NULL; + + qdev_realize(&dev->qdev, &bus->qbus, &local_err); + if (local_err) { + error_report_err(local_err); + return NULL; + } + + /* set vid/did according to sr/iov spec - they are not used */ + pci_config_set_vendor_id(dev->config, 0xffff); + pci_config_set_device_id(dev->config, 0xffff); + + return dev; +} + +static void register_vfs(PCIDevice *dev) +{ + uint16_t num_vfs; + uint16_t i; + uint16_t sriov_cap = dev->exp.sriov_cap; + uint16_t vf_offset = + pci_get_word(dev->config + sriov_cap + PCI_SRIOV_VF_OFFSET); + uint16_t vf_stride = + pci_get_word(dev->config + sriov_cap + PCI_SRIOV_VF_STRIDE); + int32_t devfn = dev->devfn + vf_offset; + + assert(sriov_cap > 0); + num_vfs = pci_get_word(dev->config + sriov_cap + PCI_SRIOV_NUM_VF); + + dev->exp.sriov_pf.vf = g_malloc(sizeof(PCIDevice *) * num_vfs); + assert(dev->exp.sriov_pf.vf); + + trace_sriov_register_vfs(dev->name, PCI_SLOT(dev->devfn), + PCI_FUNC(dev->devfn), num_vfs); + for (i = 0; i < num_vfs; i++) { + dev->exp.sriov_pf.vf[i] = register_vf(dev, devfn, + dev->exp.sriov_pf.vfname, i); + if (!dev->exp.sriov_pf.vf[i]) { + num_vfs = i; + break; + } + devfn += vf_stride; + } + dev->exp.sriov_pf.num_vfs = num_vfs; +} + +static void unregister_vfs(PCIDevice *dev) +{ + Error *local_err = NULL; + uint16_t num_vfs = dev->exp.sriov_pf.num_vfs; + uint16_t i; + + trace_sriov_unregister_vfs(dev->name, PCI_SLOT(dev->devfn), + PCI_FUNC(dev->devfn), num_vfs); + for (i = 0; i < num_vfs; i++) { + PCIDevice *vf = dev->exp.sriov_pf.vf[i]; + object_property_set_bool(OBJECT(vf), "realized", false, &local_err); + if (local_err) { + fprintf(stderr, "Failed to unplug: %s\n", + error_get_pretty(local_err)); + error_free(local_err); + } + object_unparent(OBJECT(vf)); + } + g_free(dev->exp.sriov_pf.vf); + dev->exp.sriov_pf.vf = NULL; + dev->exp.sriov_pf.num_vfs = 0; + pci_set_word(dev->config + dev->exp.sriov_cap + PCI_SRIOV_NUM_VF, 0); +} + +void pcie_sriov_config_write(PCIDevice *dev, uint32_t address, + uint32_t val, int len) +{ + uint32_t off; + uint16_t sriov_cap = dev->exp.sriov_cap; + + if (!sriov_cap || address < sriov_cap) { + return; + } + off = address - sriov_cap; + if (off >= PCI_EXT_CAP_SRIOV_SIZEOF) { + return; + } + + trace_sriov_config_write(dev->name, PCI_SLOT(dev->devfn), + PCI_FUNC(dev->devfn), off, val, len); + + if (range_covers_byte(off, len, PCI_SRIOV_CTRL)) { + if (dev->exp.sriov_pf.num_vfs) { + if (!(val & PCI_SRIOV_CTRL_VFE)) { + unregister_vfs(dev); + } + } else { + if (val & PCI_SRIOV_CTRL_VFE) { + register_vfs(dev); + } + } + } +} + + +/* Reset SR/IOV VF Enable bit to trigger an unregister of all VFs */ +void pcie_sriov_pf_disable_vfs(PCIDevice *dev) +{ + uint16_t sriov_cap = dev->exp.sriov_cap; + if (sriov_cap) { + uint32_t val = pci_get_byte(dev->config + sriov_cap + PCI_SRIOV_CTRL); + if (val & PCI_SRIOV_CTRL_VFE) { + val &= ~PCI_SRIOV_CTRL_VFE; + pcie_sriov_config_write(dev, sriov_cap + PCI_SRIOV_CTRL, val, 1); + } + } +} + +/* Add optional supported page sizes to the mask of supported page sizes */ +void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize) +{ + uint8_t *cfg = dev->config + dev->exp.sriov_cap; + uint8_t *wmask = dev->wmask + dev->exp.sriov_cap; + + uint16_t sup_pgsize = pci_get_word(cfg + PCI_SRIOV_SUP_PGSIZE); + + sup_pgsize |= opt_sup_pgsize; + + /* + * Make sure the new bits are set, and that system page size + * also can be set to any of the new values according to spec: + */ + pci_set_word(cfg + PCI_SRIOV_SUP_PGSIZE, sup_pgsize); + pci_set_word(wmask + PCI_SRIOV_SYS_PGSIZE, sup_pgsize); +} + + +uint16_t pcie_sriov_vf_number(PCIDevice *dev) +{ + assert(pci_is_vf(dev)); + return dev->exp.sriov_vf.vf_number; +} + +PCIDevice *pcie_sriov_get_pf(PCIDevice *dev) +{ + return dev->exp.sriov_vf.pf; +} + +PCIDevice *pcie_sriov_get_vf_at_index(PCIDevice *dev, int n) +{ + assert(!pci_is_vf(dev)); + if (n < dev->exp.sriov_pf.num_vfs) { + return dev->exp.sriov_pf.vf[n]; + } + return NULL; +} diff --git a/hw/pci/trace-events b/hw/pci/trace-events index 7570752c40..aaf46bc92d 100644 --- a/hw/pci/trace-events +++ b/hw/pci/trace-events @@ -10,3 +10,8 @@ pci_cfg_write(const char *dev, uint32_t bus, uint32_t slot, uint32_t func, unsig # msix.c msix_write_config(char *name, bool enabled, bool masked) "dev %s enabled %d masked %d" + +# hw/pci/pcie_sriov.c +sriov_register_vfs(const char *name, int slot, int function, int num_vfs) "%s %02x:%x: creating %d vf devs" +sriov_unregister_vfs(const char *name, int slot, int function, int num_vfs) "%s %02x:%x: Unregistering %d vf devs" +sriov_config_write(const char *name, int slot, int fun, uint32_t offset, uint32_t val, uint32_t len) "%s %02x:%x: sriov offset 0x%x val 0x%x len %d" |