From 1eb68618ada706fa0e03b41f625080c8ef5aedf7 Mon Sep 17 00:00:00 2001
From: "Rob Herring (Arm)" <robh@kernel.org>
Date: Thu, 1 Aug 2024 15:37:16 -0600
Subject: [PATCH] drm: panthor-rs: Hook-up ioctls to C code
All but bo_mmap_offset hooked up.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
drivers/gpu/drm/panthor-rs/Makefile | 9 +
drivers/gpu/drm/panthor-rs/file.rs | 200 +++++++++++++++++++
drivers/gpu/drm/panthor-rs/panthor_drv.c | 239 +----------------------
rust/bindings/bindings_helper.h | 3 +
4 files changed, 222 insertions(+), 229 deletions(-)
diff --git a/drivers/gpu/drm/panthor-rs/Makefile b/drivers/gpu/drm/panthor-rs/Makefile
index c39521d5ca9e3..6be31c5cfdcf4 100644
--- a/drivers/gpu/drm/panthor-rs/Makefile
+++ b/drivers/gpu/drm/panthor-rs/Makefile
@@ -1,6 +1,15 @@
# SPDX-License-Identifier: GPL-2.0 or MIT
panthor_rs-y := \
+ panthor_devfreq.o \
+ panthor_device.o \
+ panthor_drv.o \
+ panthor_fw.o \
+ panthor_gem.o \
+ panthor_gpu.o \
+ panthor_heap.o \
+ panthor_mmu.o \
+ panthor_sched.o \
panthor.o
obj-$(CONFIG_DRM_PANTHOR_RS) += panthor_rs.o
diff --git a/drivers/gpu/drm/panthor-rs/file.rs b/drivers/gpu/drm/panthor-rs/file.rs
index 7ebbce7c88150..4976f45ad93c6 100644
--- a/drivers/gpu/drm/panthor-rs/file.rs
+++ b/drivers/gpu/drm/panthor-rs/file.rs
@@ -18,15 +18,58 @@ use core::ffi;
use core::ptr;
use kernel::prelude::*;
use kernel::{
+ bindings,
drm::file::GenericFile,
drm::{self, device::Device as DrmDevice},
error::to_result,
+ uaccess::UserSlice,
uapi,
};
/// Convenience type alias for our DRM `File` type.
pub(crate) type DrmFile = drm::file::File<File>;
+extern "C" {
+ fn _panthor_ioctl_dev_query(
+ ptdev: *mut bindings::panthor_device,
+ args: *mut uapi::drm_panthor_dev_query,
+ ) -> ffi::c_int;
+ fn panthor_vm_pool_create_vm(
+ ptdev: *mut bindings::panthor_device,
+ pool: *mut bindings::panthor_vm_pool,
+ data: *mut uapi::drm_panthor_vm_create,
+ ) -> ffi::c_int;
+ fn panthor_ioctl_vm_bind_async(
+ args: *mut uapi::drm_panthor_vm_bind,
+ file: *mut bindings::drm_file,
+ ) -> ffi::c_int;
+ fn panthor_ioctl_vm_bind_sync(
+ args: *mut uapi::drm_panthor_vm_bind,
+ file: *mut bindings::drm_file,
+ ) -> ffi::c_int;
+ fn panthor_group_submit(
+ ddev: *mut bindings::drm_device,
+ args: *mut uapi::drm_panthor_group_submit,
+ file: *mut bindings::drm_file,
+ ) -> core::ffi::c_int;
+ fn panthor_tiler_heap_create(
+ pfile: *mut bindings::panthor_file,
+ args: *mut uapi::drm_panthor_tiler_heap_create,
+ ) -> core::ffi::c_int;
+ fn panthor_tiler_heap_destroy(
+ pfile: *mut bindings::panthor_file,
+ args: *const uapi::drm_panthor_tiler_heap_destroy,
+ ) -> core::ffi::c_int;
+ fn _panthor_group_create(
+ args: *mut uapi::drm_panthor_group_create,
+ pfile: *mut bindings::panthor_file,
+ ) -> core::ffi::c_int;
+ fn panthor_group_get_state(
+ pfile: *mut bindings::panthor_file,
+ get_state: *mut uapi::drm_panthor_group_get_state,
+ ) -> core::ffi::c_int;
+}
+
/// State associated with a client.
#[repr(C)]
pub(crate) struct File {
@@ -56,6 +99,12 @@ impl drm::file::DriverFile for File {
}
}
+fn struct_to_slice<T>(data: &T) -> &[u8] {
+ let ptr = data as *const T as *const u8;
+ let len = core::mem::size_of::<T>();
+ unsafe { core::slice::from_raw_parts(ptr, len) }
+}
+
impl File {
/// IOCTL: dev_query
pub(crate) fn dev_query(
@@ -63,6 +112,38 @@ impl File {
data: &mut uapi::drm_panthor_dev_query,
_file: &DrmFile,
) -> Result<u32> {
+ if data.pointer == 0 {
+ let size = match data.type_ {
+ uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_GPU_INFO => {
+ core::mem::size_of::<uapi::drm_panthor_gpu_info>()
+ }
+ uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_CSIF_INFO => {
+ core::mem::size_of::<uapi::drm_panthor_csif_info>()
+ }
+ _ => return Err(EINVAL),
+ };
+ data.size = size as u32;
+ return Ok(0);
+ }
+
+ let mut write = UserSlice::new(data.pointer as usize, data.size as usize).writer();
+ let ptdev = device.data().ptdev;
+
+ match data.type_ {
+ // TODO: worry about userspace expect old, smaller size struct
+ uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_GPU_INFO => {
+ write.write_slice(struct_to_slice::<kernel::bindings::drm_panthor_gpu_info>(
+ unsafe { &(*ptdev).gpu_info },
+ ))?
+ }
+ uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_CSIF_INFO => {
+ write.write_slice(struct_to_slice::<kernel::bindings::drm_panthor_csif_info>(
+ unsafe { &(*ptdev).csif_info },
+ ))?
+ }
+ _ => return Err(EINVAL),
+ };
+
Ok(0)
}
@@ -72,6 +153,16 @@ impl File {
data: &mut uapi::drm_panthor_vm_create,
file: &DrmFile,
) -> Result<u32> {
+ let devdata = device.data();
+
+ to_result(unsafe {
+ let pfile: *mut bindings::panthor_file = (*file.raw()).driver_priv as *mut _;
+ let id = panthor_vm_pool_create_vm(devdata.ptdev, (*pfile).vms, data);
+ if id >= 0 {
+ data.id = id.try_into()?;
+ }
+ id
+ })?;
Ok(0)
}
@@ -81,6 +172,14 @@ impl File {
data: &mut uapi::drm_panthor_vm_destroy,
file: &DrmFile,
) -> Result<u32> {
+ if data.pad != 0 {
+ return Err(EINVAL);
+ }
+
+ to_result(unsafe {
+ let pfile: *mut bindings::panthor_file = (*file.raw()).driver_priv as *mut _;
+ bindings::panthor_vm_pool_destroy_vm((*pfile).vms, data.id)
+ })?;
Ok(0)
}
@@ -90,6 +189,13 @@ impl File {
data: &mut uapi::drm_panthor_vm_bind,
file: &DrmFile,
) -> Result<u32> {
+ //TODO: drm_dev_enter(device., &cookie))
+
+ if data.flags == uapi::drm_panthor_vm_bind_flags_DRM_PANTHOR_VM_BIND_ASYNC {
+ to_result(unsafe { panthor_ioctl_vm_bind_async(data, file.raw() as *mut _) })?;
+ } else {
+ to_result(unsafe { panthor_ioctl_vm_bind_sync(data, file.raw() as *mut _) })?;
+ }
Ok(0)
}
@@ -99,6 +205,20 @@ impl File {
data: &mut uapi::drm_panthor_vm_get_state,
file: &DrmFile,
) -> Result<u32> {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+ let vm = unsafe { bindings::panthor_vm_pool_get_vm((*pfile).vms, data.vm_id) };
+
+ if vm.is_null() {
+ return Err(EINVAL);
+ }
+
+ if unsafe { bindings::panthor_vm_is_unusable(vm) } {
+ data.state = uapi::drm_panthor_vm_state_DRM_PANTHOR_VM_STATE_UNUSABLE;
+ } else {
+ data.state = uapi::drm_panthor_vm_state_DRM_PANTHOR_VM_STATE_USABLE;
+ }
+
+ unsafe { bindings::panthor_vm_put(vm) };
Ok(0)
}
@@ -108,6 +228,40 @@ impl File {
data: &mut uapi::drm_panthor_bo_create,
file: &DrmFile,
) -> Result<u32> {
+ //TODO if (!drm_dev_enter(ddev, &cookie))
+ // return -ENODEV;
+
+ if data.size == 0
+ || data.pad != 0
+ || (data.flags & !uapi::drm_panthor_bo_flags_DRM_PANTHOR_BO_NO_MMAP != 0)
+ {
+ return Err(EINVAL);
+ }
+
+ let mut vm = ptr::null_mut();
+ if data.exclusive_vm_id != 0 {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+ vm = unsafe { bindings::panthor_vm_pool_get_vm((*pfile).vms, data.exclusive_vm_id) };
+
+ if vm.is_null() {
+ return Err(EINVAL);
+ }
+ }
+
+ let ret = unsafe {
+ let ptdev = device.data().ptdev;
+ bindings::panthor_gem_create_with_handle(
+ file.raw() as *mut _,
+ (*ptdev).base,
+ vm,
+ &mut data.size as *mut _,
+ data.flags,
+ &mut data.handle as *mut _,
+ )
+ };
+ unsafe { bindings::panthor_vm_put(vm) };
+
+ to_result(ret)?;
Ok(0)
}
@@ -120,12 +274,38 @@ impl File {
Ok(0)
}
+ fn _group_priority_permit(file: &DrmFile, priority: u32) -> Result<u32> {
+ /* Ensure that priority is valid */
+ if priority > uapi::drm_panthor_group_priority_PANTHOR_GROUP_PRIORITY_HIGH {
+ return Err(EINVAL);
+ }
+
+ /* Medium priority and below are always allowed */
+ if priority <= uapi::drm_panthor_group_priority_PANTHOR_GROUP_PRIORITY_MEDIUM {
+ return Ok(0);
+ }
+
+ /* Higher priorities require CAP_SYS_NICE or DRM_MASTER */
+ if unsafe { bindings::capable(uapi::CAP_SYS_NICE.try_into().unwrap()) }
+ || file.is_current_master()
+ {
+ return Ok(0);
+ }
+
+ Err(EACCES)
+ }
+
/// IOCTL: group_create
pub(crate) fn group_create(
_device: &PanthorDevice,
data: &mut uapi::drm_panthor_group_create,
file: &DrmFile,
) -> Result<u32> {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+
+ Self::_group_priority_permit(file, data.priority.into())?;
+
+ to_result(unsafe { _panthor_group_create(data, pfile) })?;
Ok(0)
}
@@ -135,6 +315,13 @@ impl File {
data: &mut uapi::drm_panthor_group_destroy,
file: &DrmFile,
) -> Result<u32> {
+ if data.pad != 0 {
+ return Err(EINVAL);
+ }
+
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+
+ to_result(unsafe { bindings::panthor_group_destroy(pfile, data.group_handle) })?;
Ok(0)
}
@@ -144,6 +331,9 @@ impl File {
data: &mut uapi::drm_panthor_group_get_state,
file: &DrmFile,
) -> Result<u32> {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+
+ to_result(unsafe { panthor_group_get_state(pfile, data) })?;
Ok(0)
}
@@ -153,6 +343,9 @@ impl File {
data: &mut uapi::drm_panthor_tiler_heap_create,
file: &DrmFile,
) -> Result<u32> {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+
+ to_result(unsafe { panthor_tiler_heap_create(pfile, data) })?;
Ok(0)
}
@@ -162,6 +355,9 @@ impl File {
data: &mut uapi::drm_panthor_tiler_heap_destroy,
file: &DrmFile,
) -> Result<u32> {
+ let pfile: *mut bindings::panthor_file = unsafe { (*file.raw()).driver_priv as *mut _ };
+
+ to_result(unsafe { panthor_tiler_heap_destroy(pfile, data) })?;
Ok(0)
}
@@ -171,6 +367,10 @@ impl File {
data: &mut uapi::drm_panthor_group_submit,
file: &DrmFile,
) -> Result<u32> {
+ to_result(unsafe {
+ let ptdev = device.data().ptdev;
+ panthor_group_submit((*ptdev).base, data, file.raw() as *mut _)
+ })?;
Ok(0)
}
}
diff --git a/drivers/gpu/drm/panthor-rs/panthor_drv.c b/drivers/gpu/drm/panthor-rs/panthor_drv.c
index d2e50d2d737f3..f70f691a7b6d1 100644
--- a/drivers/gpu/drm/panthor-rs/panthor_drv.c
+++ b/drivers/gpu/drm/panthor-rs/panthor_drv.c
@@ -747,140 +747,12 @@ static void panthor_submit_ctx_cleanup(struct panthor_submit_ctx *ctx,
kvfree(ctx->jobs);
}
-static int panthor_ioctl_dev_query(struct drm_device *ddev, void *data, struct drm_file *file)
-{
- struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base);
- struct drm_panthor_dev_query *args = data;
-
- if (!args->pointer) {
- switch (args->type) {
- case DRM_PANTHOR_DEV_QUERY_GPU_INFO:
- args->size = sizeof(ptdev->gpu_info);
- return 0;
-
- case DRM_PANTHOR_DEV_QUERY_CSIF_INFO:
- args->size = sizeof(ptdev->csif_info);
- return 0;
-
- default:
- return -EINVAL;
- }
- }
-
- switch (args->type) {
- case DRM_PANTHOR_DEV_QUERY_GPU_INFO:
- return PANTHOR_UOBJ_SET(args->pointer, args->size, ptdev->gpu_info);
-
- case DRM_PANTHOR_DEV_QUERY_CSIF_INFO:
- return PANTHOR_UOBJ_SET(args->pointer, args->size, ptdev->csif_info);
-
- default:
- return -EINVAL;
- }
-}
-
-#define PANTHOR_VM_CREATE_FLAGS 0
-
-static int panthor_ioctl_vm_create(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base);
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_vm_create *args = data;
- int cookie, ret;
-
- if (!drm_dev_enter(ddev, &cookie))
- return -ENODEV;
-
- ret = panthor_vm_pool_create_vm(ptdev, pfile->vms, args);
- if (ret >= 0) {
- args->id = ret;
- ret = 0;
- }
-
- drm_dev_exit(cookie);
- return ret;
-}
-
-static int panthor_ioctl_vm_destroy(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_vm_destroy *args = data;
-
- if (args->pad)
- return -EINVAL;
-
- return panthor_vm_pool_destroy_vm(pfile->vms, args->id);
-}
-
#define PANTHOR_BO_FLAGS DRM_PANTHOR_BO_NO_MMAP
-static int panthor_ioctl_bo_create(struct drm_device *ddev, void *data,
- struct drm_file *file)
+int panthor_group_submit(struct drm_device *ddev, struct drm_panthor_group_submit *args,
+ struct drm_file *file)
{
struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_bo_create *args = data;
- struct panthor_vm *vm = NULL;
- int cookie, ret;
-
- if (!drm_dev_enter(ddev, &cookie))
- return -ENODEV;
-
- if (!args->size || args->pad ||
- (args->flags & ~PANTHOR_BO_FLAGS)) {
- ret = -EINVAL;
- goto out_dev_exit;
- }
-
- if (args->exclusive_vm_id) {
- vm = panthor_vm_pool_get_vm(pfile->vms, args->exclusive_vm_id);
- if (!vm) {
- ret = -EINVAL;
- goto out_dev_exit;
- }
- }
-
- ret = panthor_gem_create_with_handle(file, ddev, vm, &args->size,
- args->flags, &args->handle);
-
- panthor_vm_put(vm);
-
-out_dev_exit:
- drm_dev_exit(cookie);
- return ret;
-}
-
-static int panthor_ioctl_bo_mmap_offset(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct drm_panthor_bo_mmap_offset *args = data;
- struct drm_gem_object *obj;
- int ret;
-
- if (args->pad)
- return -EINVAL;
-
- obj = drm_gem_object_lookup(file, args->handle);
- if (!obj)
- return -ENOENT;
-
- ret = drm_gem_create_mmap_offset(obj);
- if (ret)
- goto out;
-
- args->offset = drm_vma_node_offset_addr(&obj->vma_node);
-
-out:
- drm_gem_object_put(obj);
- return ret;
-}
-
-static int panthor_ioctl_group_submit(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_group_submit *args = data;
struct drm_panthor_queue_submit *jobs_args;
struct panthor_submit_ctx ctx;
int ret = 0, cookie;
@@ -981,41 +853,9 @@ static int panthor_ioctl_group_submit(struct drm_device *ddev, void *data,
return ret;
}
-static int panthor_ioctl_group_destroy(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_group_destroy *args = data;
-
- if (args->pad)
- return -EINVAL;
-
- return panthor_group_destroy(pfile, args->group_handle);
-}
-
-static int group_priority_permit(struct drm_file *file,
- u8 priority)
+int _panthor_group_create(struct drm_panthor_group_create *args,
+ struct panthor_file *pfile)
{
- /* Ensure that priority is valid */
- if (priority > PANTHOR_GROUP_PRIORITY_HIGH)
- return -EINVAL;
-
- /* Medium priority and below are always allowed */
- if (priority <= PANTHOR_GROUP_PRIORITY_MEDIUM)
- return 0;
-
- /* Higher priorities require CAP_SYS_NICE or DRM_MASTER */
- if (capable(CAP_SYS_NICE) || drm_is_current_master(file))
- return 0;
-
- return -EACCES;
-}
-
-static int panthor_ioctl_group_create(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_group_create *args = data;
struct drm_panthor_queue_create *queue_args;
int ret;
@@ -1026,10 +866,6 @@ static int panthor_ioctl_group_create(struct drm_device *ddev, void *data,
if (ret)
return ret;
- ret = group_priority_permit(file, args->priority);
- if (ret)
- return ret;
-
ret = panthor_group_create(pfile, args, queue_args);
if (ret >= 0) {
args->group_handle = ret;
@@ -1040,20 +876,9 @@ static int panthor_ioctl_group_create(struct drm_device *ddev, void *data,
return ret;
}
-static int panthor_ioctl_group_get_state(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_group_get_state *args = data;
-
- return panthor_group_get_state(pfile, args);
-}
-
-static int panthor_ioctl_tiler_heap_create(struct drm_device *ddev, void *data,
- struct drm_file *file)
+int panthor_tiler_heap_create(struct panthor_file *pfile,
+ struct drm_panthor_tiler_heap_create *args)
{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_tiler_heap_create *args = data;
struct panthor_heap_pool *pool;
struct panthor_vm *vm;
int ret;
@@ -1092,11 +917,9 @@ static int panthor_ioctl_tiler_heap_create(struct drm_device *ddev, void *data,
return ret;
}
-static int panthor_ioctl_tiler_heap_destroy(struct drm_device *ddev, void *data,
- struct drm_file *file)
+int panthor_tiler_heap_destroy(struct panthor_file *pfile,
+ const struct drm_panthor_tiler_heap_destroy *args)
{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_tiler_heap_destroy *args = data;
struct panthor_heap_pool *pool;
struct panthor_vm *vm;
int ret;
@@ -1122,8 +945,7 @@ static int panthor_ioctl_tiler_heap_destroy(struct drm_device *ddev, void *data,
return ret;
}
-static int panthor_ioctl_vm_bind_async(struct drm_device *ddev,
- struct drm_panthor_vm_bind *args,
+int panthor_ioctl_vm_bind_async(struct drm_panthor_vm_bind *args,
struct drm_file *file)
{
struct panthor_file *pfile = file->driver_priv;
@@ -1191,8 +1013,7 @@ static int panthor_ioctl_vm_bind_async(struct drm_device *ddev,
return ret;
}
-static int panthor_ioctl_vm_bind_sync(struct drm_device *ddev,
- struct drm_panthor_vm_bind *args,
+int panthor_ioctl_vm_bind_sync(struct drm_panthor_vm_bind *args,
struct drm_file *file)
{
struct panthor_file *pfile = file->driver_priv;
@@ -1224,46 +1045,6 @@ static int panthor_ioctl_vm_bind_sync(struct drm_device *ddev,
return ret;
}
-#define PANTHOR_VM_BIND_FLAGS DRM_PANTHOR_VM_BIND_ASYNC
-
-static int panthor_ioctl_vm_bind(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct drm_panthor_vm_bind *args = data;
- int cookie, ret;
-
- if (!drm_dev_enter(ddev, &cookie))
- return -ENODEV;
-
- if (args->flags & DRM_PANTHOR_VM_BIND_ASYNC)
- ret = panthor_ioctl_vm_bind_async(ddev, args, file);
- else
- ret = panthor_ioctl_vm_bind_sync(ddev, args, file);
-
- drm_dev_exit(cookie);
- return ret;
-}
-
-static int panthor_ioctl_vm_get_state(struct drm_device *ddev, void *data,
- struct drm_file *file)
-{
- struct panthor_file *pfile = file->driver_priv;
- struct drm_panthor_vm_get_state *args = data;
- struct panthor_vm *vm;
-
- vm = panthor_vm_pool_get_vm(pfile->vms, args->vm_id);
- if (!vm)
- return -EINVAL;
-
- if (panthor_vm_is_unusable(vm))
- args->state = DRM_PANTHOR_VM_STATE_UNUSABLE;
- else
- args->state = DRM_PANTHOR_VM_STATE_USABLE;
-
- panthor_vm_put(vm);
- return 0;
-}
-
static void
panthor_postclose(struct drm_device *ddev, struct drm_file *file)
{
diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index 8de125de72254..35d5f29e81c83 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -33,6 +33,9 @@
#include <linux/workqueue.h>
#include <../drivers/gpu/drm/panthor-rs/panthor_device.h>
+#include <../drivers/gpu/drm/panthor-rs/panthor_gem.h>
+#include <../drivers/gpu/drm/panthor-rs/panthor_mmu.h>
+#include <../drivers/gpu/drm/panthor-rs/panthor_sched.h>
/* `bindgen` gets confused at certain things. */
const size_t RUST_CONST_HELPER_ARCH_SLAB_MINALIGN = ARCH_SLAB_MINALIGN;
--
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