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-rw-r--r--samples/test_read.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/samples/test_read.c b/samples/test_read.c
deleted file mode 100644
index d8798c3..0000000
--- a/samples/test_read.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- * Userspace mediated device sample application
- *
- * Copyright (c) 2019, Nutanix Inc. All rights reserved.
- * Author: Thanos Makatos <thanos@nutanix.com>
- * Swapnil Ingle <swapnil.ingle@nutanix.com>
- * Felipe Franciosi <felipe@nutanix.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Nutanix nor the names of its contributors may be
- * used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <stdbool.h>
-#include <string.h>
-#include <linux/vfio.h>
-#include <limits.h>
-#include <assert.h>
-#include <sys/ioctl.h>
-#include <inttypes.h>
-
-#define VFIO_PATH "/dev/vfio/"
-#define VFIO_CTR_PATH VFIO_PATH "vfio"
-#define SYSFS_MUSER_DEV_PATH "/sys/class/muser/muser/"
-#define SYSFS_IOMMU_GROUP "/iommu_group"
-
-static int
-test_read(int vfio_dev_fd, off_t offset)
-{
- size_t bytes, i;
- char buf[256];
-
- memset(buf, 0, sizeof(buf));
- printf("* Reading %zd bytes at %#zx\n", sizeof(buf), offset);
- bytes = pread(vfio_dev_fd, buf, sizeof(buf), offset);
- printf("** bytes = %zd\n", bytes);
- assert(bytes == sizeof(buf));
- printf("** Read %zd bytes\n", bytes);
-
- for (i = 0; i < sizeof(buf); i++) {
- if (i % 16 == 0) {
- printf("%04lX:", i);
- }
- printf(" %02hhX", buf[i]);
- if (i % 16 == 15) {
- printf("\n");
- }
- }
- if (i % 16 != 0) {
- printf("\n");
- }
-
- return 0;
-}
-
-static int
-pci_group_id(const char *uuid)
-{
- char *dev_path;
- char group_path[PATH_MAX];
- int group_id;
-
- assert(uuid != NULL);
-
- asprintf(&dev_path, SYSFS_MUSER_DEV_PATH "%s" SYSFS_IOMMU_GROUP, uuid);
- memset(group_path, 0, sizeof(group_path));
- readlink(dev_path, group_path, sizeof(group_path));
- free(dev_path);
- sscanf(basename(group_path), "%d", &group_id);
- return group_id;
-}
-
-void print_sparse_mmap_info(struct vfio_region_info *reg)
-{
- struct vfio_region_info_cap_sparse_mmap *sparse;
-
- printf("argsz %u, cap_off %u\n", reg->argsz, reg->cap_offset);
- if (reg->cap_offset) {
- sparse = (struct vfio_region_info_cap_sparse_mmap *)
- ((void *)reg + reg->cap_offset);
- printf("cap_hdr: id %u version %u\n", sparse->header.id,
- sparse->header.version);
- printf("sparse: nr_areas %u, off 0x%llx size 0x%llx\n", sparse->nr_areas,
- sparse->areas[0].offset, sparse->areas[0].size);
- }
-}
-
-int
-main(int argc, char * argv[])
-{
- int vfio_ctr_fd, vfio_grp_fd, vfio_dev_fd;
- char *grp_path;
- size_t size = 0;
- int i;
- int err;
-
- if (argc != 2) {
- printf("Usage: %s <muser_dev_uuid>\n", argv[0]);
- return EXIT_FAILURE;
- }
-
- // Create a new VFIO container.
- printf("* Creating new VFIO container...\n");
- vfio_ctr_fd = open(VFIO_CTR_PATH, O_RDWR);
- assert(vfio_ctr_fd >= 0);
- printf("** vfio_ctr_fd = %d\n", vfio_ctr_fd);
-
- // Ensure kernel VFIO is compatible.
- printf("* Fetching VFIO API version...\n");
- err = ioctl(vfio_ctr_fd, VFIO_GET_API_VERSION);
- assert(err == VFIO_API_VERSION);
-
- // Ensure VFIO supports TYPE1 IOMMU.
- printf("* Checking for IOMMU TYPE1 extension in VFIO...\n");
- err = ioctl(vfio_ctr_fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU);
- assert(err == 1);
-
- // Open the VFIO entry for this device's IOMMU GROUP.
- err = asprintf(&grp_path, VFIO_PATH "%d", pci_group_id(argv[1]));
- assert(err > 0);
- printf("* Opening the VFIO group (%s)...\n", grp_path);
- vfio_grp_fd = open(grp_path, O_RDWR);
- assert(vfio_grp_fd >= 0);
- printf("** vfio_grp_fd = %d\n", vfio_grp_fd);
- free(grp_path);
-
- // Ensure group is viable.
- struct vfio_group_status grp_status;
- printf("* Ensuring all devices in this group are bound to VFIO...\n");
- memset(&grp_status, 0, sizeof(grp_status));
- grp_status.argsz = sizeof(grp_status);
- err = ioctl(vfio_grp_fd, VFIO_GROUP_GET_STATUS, &grp_status);
- assert(!err);
- assert((grp_status.flags & VFIO_GROUP_FLAGS_VIABLE) == 1);
-
- // Add the group to the container.
- printf("* Adding group to container...\n");
- err = ioctl(vfio_grp_fd, VFIO_GROUP_SET_CONTAINER, &vfio_ctr_fd);
- assert(!err);
-
- // Enable IOMMU type 1 on container.
- printf("* Setting IOMMU Type 1 on container...\n");
- err = ioctl(vfio_ctr_fd, VFIO_SET_IOMMU, VFIO_TYPE1v2_IOMMU);
- assert(!err);
-
- // Fetch IOMMU information from VFIO.
- struct vfio_iommu_type1_info iommu_info;
- printf("* Fetching IOMMU information...\n");
- memset(&iommu_info, 0, sizeof(iommu_info));
- iommu_info.argsz = sizeof(iommu_info);
- err = ioctl(vfio_ctr_fd, VFIO_IOMMU_GET_INFO, &iommu_info);
- assert(!err);
-
- // Get a device fd from VFIO.
- printf("* Getting a device (%s) fd from group...\n", argv[1]);
- vfio_dev_fd = ioctl(vfio_grp_fd, VFIO_GROUP_GET_DEVICE_FD, argv[1]);
- assert(vfio_dev_fd >= 0);
- printf("** vfio_dev_fd = %d\n", vfio_dev_fd);
-
- // Fetch device information.
- printf("* Fetching device information...\n");
- struct vfio_device_info dev_info;
- memset(&dev_info, 0, sizeof(dev_info));
- dev_info.argsz = sizeof(dev_info);
- err = ioctl(vfio_dev_fd, VFIO_DEVICE_GET_INFO, &dev_info);
- assert(err == 0);
- assert(dev_info.num_regions <= VFIO_PCI_NUM_REGIONS);
-
- // Fetch region information for this device.
- struct vfio_region_info *reg_info[VFIO_PCI_NUM_REGIONS] = {0};
- struct vfio_region_info *reg;
- printf("* Fetching information for %u regions\n", dev_info.num_regions);
- for (i = 0; i < (int)dev_info.num_regions; i++) {
- size = sizeof(struct vfio_region_info);
- reg = calloc(1, size);
- assert(reg != NULL);
- reg->argsz = size;
- reg->index = i;
-retry:
- err = ioctl(vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, reg);
- if (err != 0) {
- // This region doesn't exist or isn't accessible.
- printf("** %d: Region info unavailable\n", i);
- memset(reg, 0, size);
- } else {
- printf("** %d: argsz=0x%X, flags=0x%X, index=0x%X, "
- "size=0x%llX, offset=0x%llX\n",
- i,
- reg->argsz,
- reg->flags,
- reg->index,
- reg->size,
- reg->offset);
- if (reg->argsz > size) {
- size = reg->argsz;
- reg = realloc(reg, reg->argsz);
- goto retry;
- }
- print_sparse_mmap_info(reg);
- }
- reg_info[i] = reg;
- }
-
- // Fetch irq information for this device.
- struct vfio_irq_info irq_info[VFIO_PCI_NUM_IRQS];
- printf("* Fetching information for %u irqs\n", dev_info.num_irqs);
- for (i = 0; i < (int)dev_info.num_irqs; i++) {
- memset(&irq_info[i], 0, sizeof(irq_info[i]));
- irq_info[i].argsz = sizeof(irq_info[i]);
- irq_info[i].index = i;
- err = ioctl(vfio_dev_fd, VFIO_DEVICE_GET_IRQ_INFO, irq_info[i]);
- if (err != 0) {
- // This irq doesn't exist or isn't accessible.
- printf("** %d: Irq info unavailable\n", i);
- memset(&irq_info[i], 0, sizeof(irq_info[i]));
- } else {
- printf("** %d: argsz=0x%X, flags=0x%X, index=0x%X, count=%u\n",
- i,
- irq_info[i].argsz,
- irq_info[i].flags,
- irq_info[i].index,
- irq_info[i].count);
- }
- }
-
- // Test.
- err = test_read(vfio_dev_fd, reg_info[VFIO_PCI_CONFIG_REGION_INDEX]->offset);
- assert(!err);
- for (i = 0; i < (int)dev_info.num_regions; i++) {
- free(reg_info[i]);
- }
-
- return 0;
-}
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