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[PATCH 02/15] pcie: Add support for Single Root I/O Virtualization (SR/I
|
From: |
Lukasz Maniak |
|
Subject: |
[PATCH 02/15] pcie: Add support for Single Root I/O Virtualization (SR/IOV) |
|
Date: |
Thu, 7 Oct 2021 18:23:53 +0200 |
From: Knut Omang <knut.omang@oracle.com>
This patch provides the building blocks for creating an SR/IOV
PCIe Extended Capability header and register/unregister
SR/IOV Virtual Functions.
Signed-off-by: Knut Omang <knuto@ifi.uio.no>
---
hw/pci/meson.build | 1 +
hw/pci/pci.c | 97 +++++++++---
hw/pci/pcie.c | 5 +
hw/pci/pcie_sriov.c | 287 ++++++++++++++++++++++++++++++++++++
hw/pci/trace-events | 5 +
include/hw/pci/pci.h | 12 +-
include/hw/pci/pcie.h | 6 +
include/hw/pci/pcie_sriov.h | 67 +++++++++
include/qemu/typedefs.h | 2 +
9 files changed, 456 insertions(+), 26 deletions(-)
create mode 100644 hw/pci/pcie_sriov.c
create mode 100644 include/hw/pci/pcie_sriov.h
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 186758ee11..1ad647f78e 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);
@@ -884,6 +895,15 @@ static void pci_init_multifunction(PCIBus *bus, PCIDevice
*dev, Error **errp)
dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
}
+ /* 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.
@@ -1083,6 +1103,7 @@ static PCIDevice *do_pci_register_device(PCIDevice
*pci_dev,
bus->devices[devfn]->name);
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 +1212,7 @@ 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 +1316,43 @@ 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;
+ }
+ if (reg != PCI_ROM_SLOT) {
+ /* Preserve the rom enable bit */
+ 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 +1363,7 @@ 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 +1378,7 @@ 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;
@@ -1470,6 +1520,7 @@ 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 c1a12f3744..8c6982d03c 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -426,6 +426,11 @@ 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)) {
+ /* We don't want to change any state in hotplug_dev for SR/IOV virtual
functions */
+ 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..501a1ff433
--- /dev/null
+++ b/hw/pci/pcie_sriov.c
@@ -0,0 +1,287 @@
+/*
+ * 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"
+
+#define SRIOV_ID(dev) \
+ (dev)->name, PCI_SLOT((dev)->devfn), PCI_FUNC((dev)->devfn)
+
+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(SRIOV_ID(dev), 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(SRIOV_ID(dev), 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(SRIOV_ID(dev), 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;
+}
diff --git a/hw/pci/trace-events b/hw/pci/trace-events
index fc777d0b5e..bd92cf4a25 100644
--- a/hw/pci/trace-events
+++ b/hw/pci/trace-events
@@ -10,3 +10,8 @@ pci_cfg_write(const char *dev, unsigned devid, unsigned fnid,
unsigned offs, uns
# 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"
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 7fc90132cf..d1d242c93a 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -7,9 +7,6 @@
/* PCI includes legacy ISA access. */
#include "hw/isa/isa.h"
-#include "hw/pci/pcie.h"
-#include "qom/object.h"
-
extern bool pci_available;
/* PCI bus */
@@ -156,6 +153,7 @@ enum {
#define QEMU_PCI_VGA_IO_HI_SIZE 0x20
#include "hw/pci/pci_regs.h"
+#include "hw/pci/pcie.h"
/* PCI HEADER_TYPE */
#define PCI_HEADER_TYPE_MULTI_FUNCTION 0x80
@@ -493,6 +491,9 @@ typedef AddressSpace *(*PCIIOMMUFunc)(PCIBus *, void *,
int);
AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque);
+pcibus_t pci_bar_address(PCIDevice *d,
+ int reg, uint8_t type, pcibus_t size);
+
static inline void
pci_set_byte(uint8_t *config, uint8_t val)
{
@@ -768,6 +769,11 @@ static inline int pci_is_express_downstream_port(const
PCIDevice *d)
return type == PCI_EXP_TYPE_DOWNSTREAM || type == PCI_EXP_TYPE_ROOT_PORT;
}
+static inline int pci_is_vf(const PCIDevice *d)
+{
+ return d->exp.sriov_vf.pf != NULL;
+}
+
static inline uint32_t pci_config_size(const PCIDevice *d)
{
return pci_is_express(d) ? PCIE_CONFIG_SPACE_SIZE : PCI_CONFIG_SPACE_SIZE;
diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h
index 6063bee0ec..168950a83b 100644
--- a/include/hw/pci/pcie.h
+++ b/include/hw/pci/pcie.h
@@ -24,6 +24,7 @@
#include "hw/pci/pci_regs.h"
#include "hw/pci/pcie_regs.h"
#include "hw/pci/pcie_aer.h"
+#include "hw/pci/pcie_sriov.h"
#include "hw/hotplug.h"
typedef enum {
@@ -81,6 +82,11 @@ struct PCIExpressDevice {
/* ACS */
uint16_t acs_cap;
+
+ /* SR/IOV */
+ uint16_t sriov_cap;
+ PCIESriovPF sriov_pf;
+ PCIESriovVF sriov_vf;
};
#define COMPAT_PROP_PCP "power_controller_present"
diff --git a/include/hw/pci/pcie_sriov.h b/include/hw/pci/pcie_sriov.h
new file mode 100644
index 0000000000..0974f00054
--- /dev/null
+++ b/include/hw/pci/pcie_sriov.h
@@ -0,0 +1,67 @@
+/*
+ * pcie_sriov.h:
+ *
+ * Implementation of SR/IOV emulation support.
+ *
+ * Copyright (c) 2015 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.
+ *
+ */
+
+#ifndef QEMU_PCIE_SRIOV_H
+#define QEMU_PCIE_SRIOV_H
+
+struct PCIESriovPF {
+ uint16_t num_vfs; /* Number of virtual functions created */
+ uint8_t vf_bar_type[PCI_NUM_REGIONS]; /* Store type for each VF bar */
+ const char *vfname; /* Reference to the device type used for the
VFs */
+ PCIDevice **vf; /* Pointer to an array of num_vfs VF devices */
+};
+
+struct PCIESriovVF {
+ PCIDevice *pf; /* Pointer back to owner physical function */
+ uint16_t vf_number; /* Logical VF number of this function */
+};
+
+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);
+void pcie_sriov_pf_exit(PCIDevice *dev);
+
+/* Set up a VF bar in the SR/IOV bar area */
+void pcie_sriov_pf_init_vf_bar(PCIDevice *dev, int region_num,
+ uint8_t type, dma_addr_t size);
+
+/* Instantiate a bar for a VF */
+void pcie_sriov_vf_register_bar(PCIDevice *dev, int region_num,
+ MemoryRegion *memory);
+
+/* Default (minimal) page size support values as required by the SR/IOV
standard:
+ * 0x553 << 12 = 0x553000 = 4K + 8K + 64K + 256K + 1M + 4M
+ */
+#define SRIOV_SUP_PGSIZE_MINREQ 0x553
+
+/* Optionally add supported page sizes to the mask of supported page sizes
+ * Page size values are interpreted as opt_sup_pgsize << 12.
+ */
+void pcie_sriov_pf_add_sup_pgsize(PCIDevice *dev, uint16_t opt_sup_pgsize);
+
+/* SR/IOV capability config write handler */
+void pcie_sriov_config_write(PCIDevice *dev, uint32_t address,
+ uint32_t val, int len);
+
+/* Reset SR/IOV VF Enable bit to unregister all VFs */
+void pcie_sriov_pf_disable_vfs(PCIDevice *dev);
+
+/* Get logical VF number of a VF - only valid for VFs */
+uint16_t pcie_sriov_vf_number(PCIDevice *dev);
+
+/* Get the physical function that owns this VF.
+ * Returns NULL if dev is not a virtual function
+ */
+PCIDevice *pcie_sriov_get_pf(PCIDevice *dev);
+
+#endif /* QEMU_PCIE_SRIOV_H */
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index ee60eb3de4..5b302cb214 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -86,6 +86,8 @@ typedef struct PCIDevice PCIDevice;
typedef struct PCIEAERErr PCIEAERErr;
typedef struct PCIEAERLog PCIEAERLog;
typedef struct PCIEAERMsg PCIEAERMsg;
+typedef struct PCIESriovPF PCIESriovPF;
+typedef struct PCIESriovVF PCIESriovVF;
typedef struct PCIEPort PCIEPort;
typedef struct PCIESlot PCIESlot;
typedef struct PCIExpressDevice PCIExpressDevice;
--
2.25.1
- [PATCH 07/15] hw/nvme: Add support for Secondary Controller List, (continued)
- [PATCH 07/15] hw/nvme: Add support for Secondary Controller List, Lukasz Maniak, 2021/10/07
- [PATCH 11/15] hw/nvme: Calculate BAR atributes in a function, Lukasz Maniak, 2021/10/07
- [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/07
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/12
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/12
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/13
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/15
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Michael S. Tsirkin, 2021/10/15
- Re: [PATCH 04/15] pcie: Add callback preceding SR-IOV VFs update, Lukasz Maniak, 2021/10/20
[PATCH 02/15] pcie: Add support for Single Root I/O Virtualization (SR/IOV),
Lukasz Maniak <=
[PATCH 05/15] hw/nvme: Add support for SR-IOV, Lukasz Maniak, 2021/10/07
[PATCH 10/15] hw/nvme: Make max_ioqpairs and msix_qsize configurable in runtime, Lukasz Maniak, 2021/10/07
Re: [PATCH 00/15] hw/nvme: SR-IOV with Virtualization Enhancements, Klaus Jensen, 2021/10/08