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Extend attribute handling: - svm_range_check_attr(): Accept KFD_IOCTL_SVM_ATTR_MAPPED attribute - svm_range_apply_attrs(): Set prange->is_map when MAPPED attr present - svm_range_is_same_attrs(): Force update when MAPPED attribute used - svm_range_has_mapped_attr(): Helper to detect MAPPED in attr list 3. Register ioctl in amdkfd_ioctls table: - Add AMDKFD_IOC_SVM_RANGES entry with kfd_ioctl_svm_ranges handler - No special flags required (use default permissions) This completes the implementation of batch SVM range registration, allowing userspace to efficiently register multiple non-contiguous memory buffers with a single ioctl call. The implementation reuses existing SVM infrastructure while adding the ability to handle pre-pinned memory pages, reducing overhead for applications that need to register many scattered allocations. Signed-off-by: Honglei Huang --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 67 ++++++++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index fdf171ad4a3c..7e7e00d3f873 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1739,6 +1739,70 @@ static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data) return r; } + +static int kfd_ioctl_svm_ranges(struct file *filep, struct kfd_process *p, + void *data) +{ + struct kfd_ioctl_svm_ranges_args *args = data; + struct kfd_ioctl_svm_args *svm_args; + int r = 0, err; + struct kfd_ioctl_svm_range *ranges; + size_t sattr; + + if (!args->nranges || !args->ranges_ptr) + return -EINVAL; + if (!args->start_addr || !args->size) + return -EINVAL; + + pr_debug("start 0x%llx size 0x%llx op 0x%x nattr 0x%x nranges 0x%x\n", + args->start_addr, args->size, args->op, args->nattr, args->nranges); + + if (args->nranges && args->ranges_ptr) { + ranges = kvmalloc_array(args->nranges, sizeof(*ranges), + GFP_KERNEL); + if (!ranges) + return -ENOMEM; + + err = copy_from_user(ranges, (void __user *)args->ranges_ptr, + args->nranges * sizeof(*ranges)); + if (err != 0) { + kvfree(ranges); + return -EFAULT; + } + + r = svm_pin_user_ranges(p, args->start_addr, args->size, ranges, + args->nranges); + + kvfree(ranges); + + if (r) + return r; + } + + sattr = args->nattr * sizeof(struct kfd_ioctl_svm_attribute); + + svm_args = kvmalloc(sizeof(*svm_args) + sattr, GFP_KERNEL); + if (!svm_args) + return -ENOMEM; + + svm_args->start_addr = args->start_addr; + svm_args->size = args->size; + svm_args->nattr = args->nattr; + svm_args->op = args->op; + + err = copy_from_user(&svm_args->attrs[0], (void __user *)args->attrs_ptr, + sattr); + if (err != 0) { + kvfree(svm_args); + return -EFAULT; + } + + r = kfd_ioctl_svm(filep, p, svm_args); + + kvfree(svm_args); + return r; +} + #else static int kfd_ioctl_set_xnack_mode(struct file *filep, struct kfd_process *p, void *data) @@ -3226,6 +3290,9 @@ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = { AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP, kfd_ioctl_set_debug_trap, 0), + + AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM_RANGES, + kfd_ioctl_svm_ranges, 0), }; #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls) -- 2.34.1