[src/trunk]: src/sys/external/bsd/drm2/dist/drm/i915 Stub out some functions.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3834e88b1ce4
branches:  trunk
changeset: 1028594:3834e88b1ce4
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 11:24:21 2021 +0000

description:
Stub out some functions.

We can probably do without the fast path, and let's see whether
we get to i915_gem_phys_pwrite at all.


Author: Maya Rashish <maya%NetBSD.org@localhost>
Committer: Taylor R Campbell <riastradh%NetBSD.org@localhost>

diffstat:

 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c |  21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diffs (82 lines):

diff -r 4c295a8c0ec4 -r 3834e88b1ce4 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Sun Dec 19 11:24:14 2021 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Sun Dec 19 11:24:21 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_gem.c,v 1.67 2021/12/19 11:16:24 riastradh Exp $  */
+/*     $NetBSD: i915_gem.c,v 1.68 2021/12/19 11:24:21 riastradh Exp $  */
 
 /*
  * Copyright © 2008-2015 Intel Corporation
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.67 2021/12/19 11:16:24 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.68 2021/12/19 11:24:21 riastradh Exp $");
 
 #ifdef __NetBSD__
 #if 0                          /* XXX uvmhist option?  */
@@ -205,6 +205,9 @@
                     struct drm_i915_gem_pwrite *args,
                     struct drm_file *file)
 {
+#ifdef __NetBSD__
+       panic("TODO");
+#else
        void *vaddr = sg_page(obj->mm.pages->sgl) + args->offset;
        char __user *user_data = u64_to_user_ptr(args->data_ptr);
 
@@ -221,6 +224,7 @@
        intel_gt_chipset_flush(&to_i915(obj->base.dev)->gt);
 
        i915_gem_object_flush_frontbuffer(obj, ORIGIN_CPU);
+#endif
        return 0;
 }
 
@@ -396,18 +400,27 @@
        void __iomem *vaddr;
        unsigned long unwritten;
 
+#ifdef __NetBSD__
+       // No fast path for us.
+       unwritten = -EFAULT;
+#else
        /* We can use the cpu mem copy function because this is X86. */
        vaddr = io_mapping_map_atomic_wc(mapping, base);
        unwritten = __copy_to_user_inatomic(user_data,
                                            (void __force *)vaddr + offset,
                                            length);
        io_mapping_unmap_atomic(vaddr);
+#endif
        if (unwritten) {
                vaddr = io_mapping_map_wc(mapping, base, PAGE_SIZE);
                unwritten = copy_to_user(user_data,
                                         (void __force *)vaddr + offset,
                                         length);
+#ifdef __NetBSD__
+               io_mapping_unmap(mapping, vaddr);
+#else
                io_mapping_unmap(vaddr);
+#endif
        }
        return unwritten;
 }
@@ -571,6 +584,9 @@
           loff_t base, int offset,
           char __user *user_data, int length)
 {
+#ifdef __NetBSD__
+       return length;
+#else
        void __iomem *vaddr;
        unsigned long unwritten;
 
@@ -587,6 +603,7 @@
        }
 
        return unwritten;
+#endif
 }
 
 /**