diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/1307-drm-amdkfd-Support-registering-third-pary-device-mem.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/1307-drm-amdkfd-Support-registering-third-pary-device-mem.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/1307-drm-amdkfd-Support-registering-third-pary-device-mem.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/1307-drm-amdkfd-Support-registering-third-pary-device-mem.patch new file mode 100644 index 00000000..b832cab1 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/1307-drm-amdkfd-Support-registering-third-pary-device-mem.patch @@ -0,0 +1,72 @@ +From 450c0b97336d03d484ec12cb45dcdd37f3fbcb5f Mon Sep 17 00:00:00 2001 +From: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> +Date: Thu, 13 Jul 2017 12:00:20 -0400 +Subject: [PATCH 1307/4131] drm/amdkfd: Support registering third pary device + memory + +Register userptr that corresponds to third party device memory for GPU +access. Instead of userptr BO a doorbell BO will be created using the +physical address of the third party device memory. User space will treat +the doorbell BO as a regular userptr BO + +BUG: KFD-351 +Change-Id: I7ff5ded4ab0a90e01f984c1e0dc8067f09a35baa +Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> +--- + drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 26 +++++++++++++++++++++----- + 1 file changed, 21 insertions(+), 5 deletions(-) + +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +index 814ad7f..c254b52 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +@@ -1194,7 +1194,9 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, + struct kfd_dev *dev; + int idr_handle; + long err; +- uint64_t offset; ++ uint64_t offset = args->mmap_offset; ++ uint32_t flags = args->flags; ++ struct vm_area_struct *vma; + + if (args->size == 0) + return -EINVAL; +@@ -1209,17 +1211,31 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, + if (IS_ERR(pdd)) + return PTR_ERR(pdd); + +- if (args->flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) { ++ if (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) { ++ /* Check if the userptr corresponds to another (or third-party) ++ * device local memory. If so treat is as a doorbell. User ++ * space will be oblivious of this and will use this doorbell ++ * BO as a regular userptr BO ++ */ ++ vma = find_vma(current->mm, args->mmap_offset); ++ if (vma && (vma->vm_flags & VM_IO)) { ++ unsigned long pfn; ++ ++ follow_pfn(vma, args->mmap_offset, &pfn); ++ flags |= KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL; ++ flags &= ~KFD_IOC_ALLOC_MEM_FLAGS_USERPTR; ++ offset = (pfn << PAGE_SHIFT); ++ } ++ } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) { + if (args->size != kfd_doorbell_process_slice(dev)) + return -EINVAL; + offset = kfd_get_process_doorbells(dev, p); +- } else +- offset = args->mmap_offset; ++ } + + err = dev->kfd2kgd->alloc_memory_of_gpu( + dev->kgd, args->va_addr, args->size, + pdd->vm, (struct kgd_mem **) &mem, &offset, +- NULL, args->flags); ++ NULL, flags); + + if (err != 0) + return err; +-- +2.7.4 + |