diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2188-drm-amdkfd-Make-event-limit-dependent-on-user-mode-m.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2188-drm-amdkfd-Make-event-limit-dependent-on-user-mode-m.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2188-drm-amdkfd-Make-event-limit-dependent-on-user-mode-m.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2188-drm-amdkfd-Make-event-limit-dependent-on-user-mode-m.patch new file mode 100644 index 00000000..7f5a5ad6 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2188-drm-amdkfd-Make-event-limit-dependent-on-user-mode-m.patch @@ -0,0 +1,95 @@ +From 32425ae91b810fce32d59bdaae474774392bb6e3 Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Fri, 27 Oct 2017 19:35:29 -0400 +Subject: [PATCH 2188/4131] drm/amdkfd: Make event limit dependent on user mode + mapping size + +This allows increasing the KFD_SIGNAL_EVENT_LIMIT in kfd_ioctl.h +without breaking processes built with older kfd_ioctl.h versions. + +Change-Id: I6826203ff37a232be77348dbb583f727e1bc035c +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> +--- + drivers/gpu/drm/amd/amdkfd/kfd_events.c | 25 +++++++++++++++++++------ + drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 + + 2 files changed, 20 insertions(+), 6 deletions(-) + +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c +index 9bdea43..ef2e131 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c +@@ -101,9 +101,17 @@ static int allocate_event_notification_slot(struct kfd_process *p, + p->signal_page = allocate_signal_page(p); + if (!p->signal_page) + return -ENOMEM; ++ /* Oldest user mode expects 256 event slots */ ++ p->signal_mapped_size = 256*8; + } + +- id = idr_alloc(&p->event_idr, ev, 0, KFD_SIGNAL_EVENT_LIMIT, ++ /* ++ * Compatibility with old user mode: Only use signal slots ++ * user mode has mapped, may be less than ++ * KFD_SIGNAL_EVENT_LIMIT. This also allows future increase ++ * of the event limit without breaking user mode. ++ */ ++ id = idr_alloc(&p->event_idr, ev, 0, p->signal_mapped_size / 8, + GFP_KERNEL); + if (id < 0) + return id; +@@ -200,7 +208,8 @@ static int create_signal_event(struct file *devkfd, + { + int ret; + +- if (p->signal_event_count == KFD_SIGNAL_EVENT_LIMIT) { ++ if (p->signal_mapped_size && ++ p->signal_event_count == p->signal_mapped_size / 8) { + if (!p->signal_event_limit_reached) { + pr_warn("Signal event wasn't created because limit was reached\n"); + p->signal_event_limit_reached = true; +@@ -776,12 +785,12 @@ int kfd_wait_on_events(struct kfd_process *p, + + int kfd_event_mmap(struct kfd_process *p, struct vm_area_struct *vma) + { +- + unsigned long pfn; + struct kfd_signal_page *page; ++ int ret; + +- /* check required size is logical */ +- if (get_order(KFD_SIGNAL_EVENT_LIMIT * 8) != ++ /* check required size doesn't exceed the allocated size */ ++ if (get_order(KFD_SIGNAL_EVENT_LIMIT * 8) < + get_order(vma->vm_end - vma->vm_start)) { + pr_err("Event page mmap requested illegal size\n"); + return -EINVAL; +@@ -811,8 +820,12 @@ int kfd_event_mmap(struct kfd_process *p, struct vm_area_struct *vma) + page->user_address = (uint64_t __user *)vma->vm_start; + + /* mapping the page to user process */ +- return remap_pfn_range(vma, vma->vm_start, pfn, ++ ret = remap_pfn_range(vma, vma->vm_start, pfn, + vma->vm_end - vma->vm_start, vma->vm_page_prot); ++ if (!ret) ++ p->signal_mapped_size = vma->vm_end - vma->vm_start; ++ ++ return ret; + } + + /* +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +index 215686a..e263c99 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +@@ -717,6 +717,7 @@ struct kfd_process { + struct idr event_idr; + /* Event page */ + struct kfd_signal_page *signal_page; ++ size_t signal_mapped_size; + size_t signal_event_count; + bool signal_event_limit_reached; + +-- +2.7.4 + |