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hv: implement sharing_mode.c for PCI emulation in sharing mode
Compared with partition_mode.c, the major difference between them is the list of PCI devices is statically defined or dynamically enumerated and allocated. Tracked-On: #1568 Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Zide Chen
lijinxia
parent
7c506ebc69
commit
83dbfe4fd3
@ -201,6 +201,11 @@ config IOMMU_INIT_BUS_LIMIT
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default 0xf if PLATFORM_SBL
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default 0xff if PLATFORM_UEFI
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config MAX_PCI_DEV_NUM
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int "Maximum number of PCI dev"
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range 1 1024
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default 96
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config MAX_MSIX_TABLE_NUM
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int "Maximum number of MSI-X Table per device"
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range 1 2048
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@ -74,6 +74,7 @@ pci_vdev_write_cfg_u32(struct pci_vdev *vdev, uint32_t offset, uint32_t val)
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}
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extern struct vpci_ops partition_mode_vpci_ops;
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extern struct vpci_ops sharing_mode_vpci_ops;
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extern struct pci_vdev_ops pci_ops_vdev_msi;
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extern struct pci_vdev_ops pci_ops_vdev_msix;
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@ -82,4 +83,7 @@ void pci_vdev_write_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes,
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void populate_msi_struct(struct pci_vdev *vdev);
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struct pci_vdev *sharing_mode_find_vdev(union pci_bdf vbdf);
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void add_vdev_handler(struct pci_vdev *vdev, struct pci_vdev_ops *ops);
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#endif /* PCI_PRIV_H_ */
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202
hypervisor/dm/vpci/sharing_mode.c
Normal file
202
hypervisor/dm/vpci/sharing_mode.c
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@ -0,0 +1,202 @@
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/*
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* Copyright (c) 2011 NetApp, Inc.
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* Copyright (c) 2018 Intel Corporation
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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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#include <hypervisor.h>
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#include "pci_priv.h"
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static uint32_t num_pci_vdev;
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static struct pci_vdev sharing_mode_vdev_array[CONFIG_MAX_PCI_DEV_NUM];
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struct pci_vdev *sharing_mode_find_vdev(union pci_bdf pbdf)
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{
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uint32_t i;
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/* in VM0, it uses phys BDF */
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for (i = 0U; i < num_pci_vdev; i++) {
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if (sharing_mode_vdev_array[i].pdev.bdf.value == pbdf.value) {
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return &sharing_mode_vdev_array[i];
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}
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}
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return NULL;
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}
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static void sharing_mode_cfgread(__unused struct vpci *vpci, union pci_bdf bdf,
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uint32_t offset, uint32_t bytes, uint32_t *val)
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{
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struct pci_vdev *vdev;
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bool handled = false;
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uint32_t i;
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vdev = sharing_mode_find_vdev(bdf);
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/* vdev == NULL: Could be hit for PCI enumeration from guests */
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if ((vdev == NULL) || ((bytes != 1U) && (bytes != 2U) && (bytes != 4U))) {
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*val = ~0U;
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return;
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}
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for (i = 0U; (i < vdev->nr_ops) && !handled; i++) {
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if (vdev->ops[i].cfgread != NULL) {
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if (vdev->ops[i].cfgread(vdev, offset, bytes, val) == 0) {
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handled = true;
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}
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}
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}
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/* Not handled by any handlers. Passthru to physical device */
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if (!handled) {
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*val = pci_pdev_read_cfg(vdev->pdev.bdf, offset, bytes);
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}
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}
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static void sharing_mode_cfgwrite(__unused struct vpci *vpci, union pci_bdf bdf,
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uint32_t offset, uint32_t bytes, uint32_t val)
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{
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struct pci_vdev *vdev;
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bool handled = false;
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uint32_t i;
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if ((bytes != 1U) && (bytes != 2U) && (bytes != 4U)) {
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return;
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}
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vdev = sharing_mode_find_vdev(bdf);
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if (vdev != NULL) {
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for (i = 0U; (i < vdev->nr_ops) && !handled; i++) {
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if (vdev->ops[i].cfgwrite != NULL) {
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if (vdev->ops[i].cfgwrite(vdev, offset, bytes, val) == 0) {
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handled = true;
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}
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}
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}
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/* Not handled by any handlers. Passthru to physical device */
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if (!handled) {
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pci_pdev_write_cfg(vdev->pdev.bdf, offset, bytes, val);
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}
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}
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}
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static struct pci_vdev *alloc_pci_vdev(struct vm *vm, union pci_bdf bdf)
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{
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struct pci_vdev *vdev;
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if (num_pci_vdev >= CONFIG_MAX_PCI_DEV_NUM) {
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return NULL;
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}
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vdev = &sharing_mode_vdev_array[num_pci_vdev++];
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/* vbdf equals to pbdf otherwise remapped */
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vdev->vbdf = bdf;
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vdev->vpci = &vm->vpci;
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vdev->pdev.bdf = bdf;
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return vdev;
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}
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static void enumerate_pci_dev(uint16_t pbdf, void *cb_data)
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{
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struct vm *vm = (struct vm *)cb_data;
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struct pci_vdev *vdev;
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vdev = alloc_pci_vdev(vm, (union pci_bdf)pbdf);
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if (vdev != NULL) {
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populate_msi_struct(vdev);
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}
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}
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static int sharing_mode_vpci_init(struct vm *vm)
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{
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struct pci_vdev *vdev;
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uint32_t i, j;
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/*
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* Only setup IO bitmap for SOS.
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* IO/MMIO requests from non-vm0 guests will be injected to device model.
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*/
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if (!is_vm0(vm)) {
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return -ENODEV;
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}
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/* Initialize PCI vdev array */
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num_pci_vdev = 0U;
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(void)memset((void *)sharing_mode_vdev_array, 0U, sizeof(sharing_mode_vdev_array));
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/* build up vdev array for vm0 */
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pci_scan_bus(enumerate_pci_dev, (void *)vm);
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for (i = 0U; i < num_pci_vdev; i++) {
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vdev = &sharing_mode_vdev_array[i];
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for (j = 0U; j < vdev->nr_ops; j++) {
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if (vdev->ops[j].init != NULL) {
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(void)vdev->ops[j].init(vdev);
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}
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}
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}
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return 0;
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}
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static void sharing_mode_vpci_deinit(__unused struct vm *vm)
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{
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struct pci_vdev *vdev;
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uint32_t i, j;
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if (!is_vm0(vm)) {
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return;
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}
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for (i = 0U; i < num_pci_vdev; i++) {
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vdev = &sharing_mode_vdev_array[i];
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for (j = 0U; j < vdev->nr_ops; j++) {
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if (vdev->ops[j].deinit != NULL) {
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(void)vdev->ops[j].deinit(vdev);
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}
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}
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}
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}
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void add_vdev_handler(struct pci_vdev *vdev, struct pci_vdev_ops *ops)
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{
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if (vdev->nr_ops >= (MAX_VPCI_DEV_OPS - 1U)) {
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pr_err("%s, adding too many handlers", __func__);
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return;
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}
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vdev->ops[vdev->nr_ops++] = *ops;
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}
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struct vpci_ops sharing_mode_vpci_ops = {
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.init = sharing_mode_vpci_init,
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.deinit = sharing_mode_vpci_deinit,
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.cfgread = sharing_mode_cfgread,
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.cfgwrite = sharing_mode_cfgwrite,
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};
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@ -124,7 +124,12 @@ void vpci_init(struct vm *vm)
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};
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vpci->vm = vm;
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#ifdef CONFIG_PARTITION_MODE
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vpci->ops = &partition_mode_vpci_ops;
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#else
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vpci->ops = &sharing_mode_vpci_ops;
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#endif
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if ((vpci->ops->init != NULL) && (vpci->ops->init(vm) == 0)) {
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register_io_emulation_handler(vm, &pci_cfg_range,
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@ -85,7 +85,14 @@ struct msix {
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};
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struct pci_vdev {
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#ifndef CONFIG_PARTITION_MODE
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#define MAX_VPCI_DEV_OPS 4U
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struct pci_vdev_ops ops[MAX_VPCI_DEV_OPS];
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uint32_t nr_ops;
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#else
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struct pci_vdev_ops *ops;
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#endif
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struct vpci *vpci;
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/* The bus/device/function triple of the virtual PCI device. */
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union pci_bdf vbdf;
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