cfn/computing-offload
Code Issues Proposed changes
79c4324644
computing-offload/generic_vdpa/qemu/vfio-Helper-to-get-IRQ-info-including-capabilities.patch
jiangdongxu 79c4324644 add generic_vdpa basecode 
Change-Id: I2d302dda68298877c65c99147f5bf22186a59aac
2024-09-19 17:19:46 +08:00

179 lines
5.7 KiB
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From a4336765c99a876743c0ead89997ad6f97d7b442 Mon Sep 17 00:00:00 2001
From: Eric Auger <eric.auger@redhat.com>
Date: Thu, 20 Jun 2019 16:39:57 +0200
Subject: [PATCH] vfio: Helper to get IRQ info including capabilities
As done for vfio regions, add helpers to retrieve irq info
including their optional capabilities.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
hw/vfio/common.c | 97 +++++++++++++++++++++++++++++++++++
hw/vfio/trace-events | 1 +
include/hw/vfio/vfio-common.h | 7 +++
3 files changed, 105 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 1f78af121d..d05a485808 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1919,6 +1919,25 @@ bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info,
return true;
}
+struct vfio_info_cap_header *
+vfio_get_irq_info_cap(struct vfio_irq_info *info, uint16_t id)
+{
+ struct vfio_info_cap_header *hdr;
+ void *ptr = info;
+
+ if (!(info->flags & VFIO_IRQ_INFO_FLAG_CAPS)) {
+ return NULL;
+ }
+
+ for (hdr = ptr + info->cap_offset; hdr != ptr; hdr = ptr + hdr->next) {
+ if (hdr->id == id) {
+ return hdr;
+ }
+ }
+
+ return NULL;
+}
+
static int vfio_setup_region_sparse_mmaps(VFIORegion *region,
struct vfio_region_info *info)
{
@@ -2887,6 +2906,33 @@ retry:
return 0;
}
+int vfio_get_irq_info(VFIODevice *vbasedev, int index,
+ struct vfio_irq_info **info)
+{
+ size_t argsz = sizeof(struct vfio_irq_info);
+
+ *info = g_malloc0(argsz);
+
+ (*info)->index = index;
+retry:
+ (*info)->argsz = argsz;
+
+ if (ioctl(vbasedev->fd, VFIO_DEVICE_GET_IRQ_INFO, *info)) {
+ g_free(*info);
+ *info = NULL;
+ return -errno;
+ }
+
+ if ((*info)->argsz > argsz) {
+ argsz = (*info)->argsz;
+ *info = g_realloc(*info, argsz);
+
+ goto retry;
+ }
+
+ return 0;
+}
+
int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
uint32_t subtype, struct vfio_region_info **info)
{
@@ -2922,6 +2968,42 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
return -ENODEV;
}
+int vfio_get_dev_irq_info(VFIODevice *vbasedev, uint32_t type,
+ uint32_t subtype, struct vfio_irq_info **info)
+{
+ int i;
+
+ for (i = 0; i < vbasedev->num_irqs; i++) {
+ struct vfio_info_cap_header *hdr;
+ struct vfio_irq_info_cap_type *cap_type;
+
+ if (vfio_get_irq_info(vbasedev, i, info)) {
+ continue;
+ }
+
+ hdr = vfio_get_irq_info_cap(*info, VFIO_IRQ_INFO_CAP_TYPE);
+ if (!hdr) {
+ g_free(*info);
+ continue;
+ }
+
+ cap_type = container_of(hdr, struct vfio_irq_info_cap_type, header);
+
+ trace_vfio_get_dev_irq(vbasedev->name, i,
+ cap_type->type, cap_type->subtype);
+
+ if (cap_type->type == type && cap_type->subtype == subtype) {
+ return 0;
+ }
+
+ g_free(*info);
+ }
+
+ *info = NULL;
+ return -ENODEV;
+}
+
+
bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type)
{
struct vfio_region_info *info = NULL;
@@ -2937,6 +3019,21 @@ bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type)
return ret;
}
+bool vfio_has_irq_cap(VFIODevice *vbasedev, int region, uint16_t cap_type)
+{
+ struct vfio_region_info *info = NULL;
+ bool ret = false;
+
+ if (!vfio_get_region_info(vbasedev, region, &info)) {
+ if (vfio_get_region_info_cap(info, cap_type)) {
+ ret = true;
+ }
+ g_free(info);
+ }
+
+ return ret;
+}
+
/*
* Interfaces for IBM EEH (Enhanced Error Handling)
*/
diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
index 35bd415d6d..f5fe201ab5 100644
--- a/hw/vfio/trace-events
+++ b/hw/vfio/trace-events
@@ -117,6 +117,7 @@ vfio_region_unmap(const char *name, unsigned long offset, unsigned long end) "Re
vfio_region_sparse_mmap_header(const char *name, int index, int nr_areas) "Device %s region %d: %d sparse mmap entries"
vfio_region_sparse_mmap_entry(int i, unsigned long start, unsigned long end) "sparse entry %d [0x%lx - 0x%lx]"
vfio_get_dev_region(const char *name, int index, uint32_t type, uint32_t subtype) "%s index %d, %08x/%0x8"
+vfio_get_dev_irq(const char *name, int index, uint32_t type, uint32_t subtype) "%s index %d, %08x/%0x8"
vfio_dma_unmap_overflow_workaround(void) ""
vfio_iommu_addr_inv_iotlb(int asid, uint64_t addr, uint64_t size, uint64_t nb_granules, bool leaf) "nested IOTLB invalidate asid=%d, addr=0x%"PRIx64" granule_size=0x%"PRIx64" nb_granules=0x%"PRIx64" leaf=%d"
vfio_iommu_asid_inv_iotlb(int asid) "nested IOTLB invalidate asid=%d"
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index a838a939e4..7fdca26fa0 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -254,6 +254,13 @@ bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info,
unsigned int *avail);
struct vfio_info_cap_header *
vfio_get_device_info_cap(struct vfio_device_info *info, uint16_t id);
+int vfio_get_irq_info(VFIODevice *vbasedev, int index,
+ struct vfio_irq_info **info);
+int vfio_get_dev_irq_info(VFIODevice *vbasedev, uint32_t type,
+ uint32_t subtype, struct vfio_irq_info **info);
+bool vfio_has_irq_cap(VFIODevice *vbasedev, int irq, uint16_t cap_type);
+struct vfio_info_cap_header *
+vfio_get_irq_info_cap(struct vfio_irq_info *info, uint16_t id);
#endif
extern const MemoryListener vfio_prereg_listener;
--
2.27.0
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