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[src/trunk]: src/sys/external/bsd/drm2/dist/drm/i915 Rework how we map i915 d...



details:   https://anonhg.NetBSD.org/src/rev/e03aba37c186
branches:  trunk
changeset: 992623:e03aba37c186
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 07:17:35 2018 +0000

description:
Rework how we map i915 drm gem objects.

The old way made no sense at all.  This way might make sense.

diffstat:

 sys/external/bsd/drm2/dist/drm/i915/i915_cmd_parser.c       |   10 +-
 sys/external/bsd/drm2/dist/drm/i915/i915_drv.h              |    8 +-
 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c              |  130 +++++-----
 sys/external/bsd/drm2/dist/drm/i915/i915_gem_fence.c        |    8 +-
 sys/external/bsd/drm2/dist/drm/i915/i915_gem_gtt.c          |  138 ++++++++--
 sys/external/bsd/drm2/dist/drm/i915/i915_gem_render_state.c |   17 +-
 sys/external/bsd/drm2/dist/drm/i915/i915_gem_stolen.c       |  106 ++++----
 sys/external/bsd/drm2/dist/drm/i915/i915_guc_submission.c   |  146 +++--------
 8 files changed, 294 insertions(+), 269 deletions(-)

diffs (truncated from 1145 to 300 lines):

diff -r c126f33c9265 -r e03aba37c186 sys/external/bsd/drm2/dist/drm/i915/i915_cmd_parser.c
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_cmd_parser.c     Mon Aug 27 07:17:21 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_cmd_parser.c     Mon Aug 27 07:17:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_cmd_parser.c,v 1.6 2018/08/27 07:04:02 riastradh Exp $    */
+/*     $NetBSD: i915_cmd_parser.c,v 1.7 2018/08/27 07:17:35 riastradh Exp $    */
 
 /*
  * Copyright © 2013 Intel Corporation
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_cmd_parser.c,v 1.6 2018/08/27 07:04:02 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_cmd_parser.c,v 1.7 2018/08/27 07:17:35 riastradh Exp $");
 
 #include "i915_drv.h"
 
@@ -883,7 +883,11 @@
 
        i = 0;
 #ifdef __NetBSD__
-       TAILQ_FOREACH(page, &obj->igo_pageq, pageq.queue) {
+       /*
+        * XXX Why do we work through the page queue instead of just
+        * using uvm_map?
+        */
+       TAILQ_FOREACH(page, &obj->pageq, pageq.queue) {
                if (first_page-- > 0)
                        continue;
                if (i == npages)
diff -r c126f33c9265 -r e03aba37c186 sys/external/bsd/drm2/dist/drm/i915/i915_drv.h
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_drv.h    Mon Aug 27 07:17:21 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_drv.h    Mon Aug 27 07:17:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_drv.h,v 1.17 2018/08/27 07:15:50 riastradh Exp $  */
+/*     $NetBSD: i915_drv.h,v 1.18 2018/08/27 07:17:35 riastradh Exp $  */
 
 /* i915_drv.h -- Private header for the I915 driver -*- linux-c -*-
  */
@@ -2177,10 +2177,8 @@
        unsigned int pin_display;
 
 #ifdef __NetBSD__
-       struct pglist igo_pageq;
-       bus_dma_segment_t *pages; /* `pages' is an expedient misnomer.  */
-       int igo_nsegs;
-       bus_dmamap_t igo_dmamap;
+       struct pglist pageq;
+       bus_dmamap_t pages;     /* expedient misnomer */
 #else
        struct sg_table *pages;
 #endif
diff -r c126f33c9265 -r e03aba37c186 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Mon Aug 27 07:17:21 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Mon Aug 27 07:17:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_gem.c,v 1.40 2018/08/27 07:06:38 riastradh Exp $  */
+/*     $NetBSD: i915_gem.c,v 1.41 2018/08/27 07:17:35 riastradh Exp $  */
 
 /*
  * Copyright © 2008-2015 Intel Corporation
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.40 2018/08/27 07:06:38 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.41 2018/08/27 07:17:35 riastradh Exp $");
 
 #ifdef __NetBSD__
 #if 0                          /* XXX uvmhist option?  */
@@ -241,12 +241,7 @@
        i915_gem_chipset_flush(obj->base.dev);
 
 #ifdef __NetBSD__
-       /*
-        * We don't need to store anything here -- the phys handle is
-        * enough.  But obj->pages can't be null while the pages are
-        * mapped.
-        */
-       obj->pages = (void *)1;
+       obj->pages = obj->phys_handle->dmah_map;
 #else
        st = kmalloc(sizeof(*st), GFP_KERNEL);
        if (st == NULL)
@@ -1100,10 +1095,10 @@
                    atop(offset));
 #else
                struct page *page = sg_page_iter_page(&sg_iter);
-#endif
 
                if (remain <= 0)
                        break;
+#endif
 
                /* Operation in this page
                 *
@@ -2647,10 +2642,10 @@
 #endif
 }
 
-#ifdef __NetBSD__
 static void
 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
 {
+#ifdef __NetBSD__
        struct drm_device *const dev = obj->base.dev;
        struct vm_page *page;
        int ret;
@@ -2666,6 +2661,8 @@
                    I915_GEM_DOMAIN_CPU;
        }
 
+       i915_gem_gtt_finish_object(obj);
+
        if (i915_gem_object_needs_bit17_swizzle(obj))
                i915_gem_object_save_bit_17_swizzle(obj);
 
@@ -2673,22 +2670,16 @@
                obj->dirty = 0;
 
        if (obj->dirty) {
-               TAILQ_FOREACH(page, &obj->igo_pageq, pageq.queue) {
+               TAILQ_FOREACH(page, &obj->pageq, pageq.queue) {
                        page->flags &= ~PG_CLEAN;
                        /* XXX mark page accessed */
                }
        }
-
-       bus_dmamap_destroy(dev->dmat, obj->igo_dmamap);
-       bus_dmamem_unwire_uvm_object(dev->dmat, obj->base.gemo_shm_uao, 0,
-           obj->base.size, obj->pages, obj->igo_nsegs);
-
-       kfree(obj->pages);
-}
+       obj->dirty = 0;
+
+       uvm_obj_unwirepages(obj->base.gemo_shm_uao, 0, obj->base.size);
+       bus_dmamap_destroy(dev->dmat, obj->pages);
 #else
-static void
-i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
-{
        struct sg_page_iter sg_iter;
        int ret;
 
@@ -2727,8 +2718,8 @@
 
        sg_free_table(obj->pages);
        kfree(obj->pages);
+#endif
 }
-#endif
 
 int
 i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
@@ -2756,44 +2747,43 @@
        return 0;
 }
 
-#ifdef __NetBSD__
 static int
 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
 {
+#ifdef __NetBSD__
        struct drm_device *const dev = obj->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
        struct vm_page *page;
-       int error;
-
-       /* XXX Cargo-culted from the Linux code.  */
+       int ret;
+
        BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS);
        BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS);
 
        KASSERT(obj->pages == NULL);
-       TAILQ_INIT(&obj->igo_pageq);
-       obj->pages = kcalloc((obj->base.size / PAGE_SIZE),
-           sizeof(obj->pages[0]), GFP_KERNEL);
-       if (obj->pages == NULL) {
-               error = -ENOMEM;
-               goto fail0;
-       }
+       TAILQ_INIT(&obj->pageq);
 
        /* XXX errno NetBSD->Linux */
-       error = -bus_dmamem_wire_uvm_object(dev->dmat, obj->base.gemo_shm_uao,
-           0, obj->base.size, &obj->igo_pageq, PAGE_SIZE, 0, obj->pages,
-           (obj->base.size / PAGE_SIZE), &obj->igo_nsegs, BUS_DMA_NOWAIT);
-       if (error)
-               /* XXX Try i915_gem_purge, i915_gem_shrink_all.  */
+       ret = -bus_dmamap_create(dev->dmat, obj->base.size,
+           obj->base.size/PAGE_SIZE, PAGE_SIZE, 0, BUS_DMA_NOWAIT,
+           &obj->pages);
+       if (ret)
+               goto fail0;
+
+       /* XXX errno NetBSD->Linux */
+       ret = -uvm_obj_wirepages(obj->base.gemo_shm_uao, 0, obj->base.size,
+           &obj->pageq);
+       if (ret)                /* XXX Try purge, shrink.  */
                goto fail1;
-       KASSERT(0 < obj->igo_nsegs);
-       KASSERT(obj->igo_nsegs <= (obj->base.size / PAGE_SIZE));
 
        /*
         * Check that the paddrs will fit in 40 bits, or 32 bits on i965.
         *
-        * XXX This is wrong; we ought to pass this constraint to
-        * bus_dmamem_wire_uvm_object instead.
+        * XXX This should be unnecessary: the uao should guarantee
+        * this constraint after uao_set_pgfl.
+        *
+        * XXX This should also be expanded for newer devices.
         */
-       TAILQ_FOREACH(page, &obj->igo_pageq, pageq.queue) {
+       TAILQ_FOREACH(page, &obj->pageq, pageq.queue) {
                const uint64_t mask =
                    (IS_BROADWATER(dev) || IS_CRESTLINE(dev)?
                        0xffffffffULL : 0xffffffffffULL);
@@ -2802,37 +2792,33 @@
                            ": %"PRIxMAX"\n",
                            popcount64(mask),
                            (uintmax_t)VM_PAGE_TO_PHYS(page));
-                       error = -EIO;
+                       ret = -EIO;
                        goto fail2;
                }
        }
 
-       /* XXX Should create the DMA map when creating the object.  */
-
-       /* XXX errno NetBSD->Linux */
-       error = -bus_dmamap_create(dev->dmat, obj->base.size, obj->igo_nsegs,
-           PAGE_SIZE, 0, BUS_DMA_NOWAIT, &obj->igo_dmamap);
-       if (error)
+       ret = i915_gem_gtt_prepare_object(obj);
+       if (ret)
                goto fail2;
 
-       /* XXX Cargo-culted from the Linux code.  */
        if (i915_gem_object_needs_bit17_swizzle(obj))
                i915_gem_object_do_bit_17_swizzle(obj);
 
+       if (obj->tiling_mode != I915_TILING_NONE &&
+           dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES)
+               i915_gem_object_pin_pages(obj);
+
        /* Success!  */
        return 0;
 
-fail2: bus_dmamem_unwire_uvm_object(dev->dmat, obj->base.gemo_shm_uao, 0,
-           obj->base.size, obj->pages, (obj->base.size / PAGE_SIZE));
-fail1: kfree(obj->pages);
+fail3: __unused
+       i915_gem_gtt_finish_object(obj);
+fail2: uvm_obj_unwirepages(obj->base.gemo_shm_uao, 0, obj->base.size);
+fail1: bus_dmamap_destroy(dev->dmat, obj->pages);
        obj->pages = NULL;
-fail0: KASSERT(error);
-       return error;
-}
+fail0: KASSERT(ret);
+       return ret;
 #else
-static int
-i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
-{
        struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
        int page_count, i;
        struct address_space *mapping;
@@ -2952,8 +2938,8 @@
                ret = -ENOMEM;
 
        return ret;
+#endif
 }
-#endif
 
 /* Ensure that the associated pages are gathered from the backing storage
  * and pinned into our object. i915_gem_object_get_pages() may be called
@@ -4193,7 +4179,7 @@
 
        trace_i915_gem_object_clflush(obj);
 #ifdef __NetBSD__
-       drm_clflush_pglist(&obj->igo_pageq);
+       drm_clflush_pglist(&obj->pageq);
 #else
        drm_clflush_sg(obj->pages);
 #endif
@@ -5886,11 +5872,18 @@
 i915_gem_object_create_from_data(struct drm_device *dev,
                                 const void *data, size_t size)
 {
+       struct drm_i915_gem_object *obj;
 #ifdef __NetBSD__
-       panic("XXX");
+       struct iovec iov = { .iov_base = __UNCONST(data), .iov_len = size };
+       struct uio uio = {



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