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[src/trunk]: src/sys/external/bsd/drm2 Implement the DRM GEM/CMA helpers. The...
details: https://anonhg.NetBSD.org/src/rev/3cfd334b7868
branches: trunk
changeset: 828676:3cfd334b7868
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Tue Dec 26 14:53:12 2017 +0000
description:
Implement the DRM GEM/CMA helpers. The implementation has been extracted
from our tegra DRM driver, but generalized for use with other drivers.
diffstat:
sys/external/bsd/drm2/dist/include/drm/drm_gem_cma_helper.h | 11 +
sys/external/bsd/drm2/drm/drm_gem_cma_helper.c | 221 ++++++++++++
sys/external/bsd/drm2/drm/files.drmkms | 5 +-
3 files changed, 235 insertions(+), 2 deletions(-)
diffs (279 lines):
diff -r 10009041fe74 -r 3cfd334b7868 sys/external/bsd/drm2/dist/include/drm/drm_gem_cma_helper.h
--- a/sys/external/bsd/drm2/dist/include/drm/drm_gem_cma_helper.h Tue Dec 26 12:43:59 2017 +0000
+++ b/sys/external/bsd/drm2/dist/include/drm/drm_gem_cma_helper.h Tue Dec 26 14:53:12 2017 +0000
@@ -5,8 +5,15 @@
struct drm_gem_cma_object {
struct drm_gem_object base;
+#ifdef __NetBSD__
+ bus_dma_tag_t dmat;
+ bus_dma_segment_t dmasegs[1];
+ bus_size_t dmasize;
+ bus_dmamap_t dmamap;
+#else
dma_addr_t paddr;
struct sg_table *sgt;
+#endif
/* For objects with DMA memory allocated by GEM CMA */
void *vaddr;
@@ -36,7 +43,11 @@
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
unsigned int size);
+#ifdef __NetBSD__
+extern const struct uvm_pagerops drm_gem_cma_uvm_ops;
+#else
extern const struct vm_operations_struct drm_gem_cma_vm_ops;
+#endif
#ifdef CONFIG_DEBUG_FS
void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
diff -r 10009041fe74 -r 3cfd334b7868 sys/external/bsd/drm2/drm/drm_gem_cma_helper.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/external/bsd/drm2/drm/drm_gem_cma_helper.c Tue Dec 26 14:53:12 2017 +0000
@@ -0,0 +1,221 @@
+/* $NetBSD: drm_gem_cma_helper.c,v 1.1 2017/12/26 14:53:12 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: drm_gem_cma_helper.c,v 1.1 2017/12/26 14:53:12 jmcneill Exp $");
+
+#include <drm/drmP.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include <uvm/uvm.h>
+
+struct drm_gem_cma_object *
+drm_gem_cma_create(struct drm_device *ddev, unsigned int size)
+{
+ struct drm_gem_cma_object *obj;
+ int error, nsegs;
+
+ obj = kmem_zalloc(sizeof(*obj), KM_SLEEP);
+ obj->dmat = ddev->bus_dmat;
+ obj->dmasize = size;
+
+ error = bus_dmamem_alloc(obj->dmat, obj->dmasize, PAGE_SIZE, 0,
+ obj->dmasegs, 1, &nsegs, BUS_DMA_WAITOK);
+ if (error)
+ goto failed;
+ error = bus_dmamem_map(obj->dmat, obj->dmasegs, nsegs,
+ obj->dmasize, &obj->vaddr, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
+ if (error)
+ goto free;
+ error = bus_dmamap_create(obj->dmat, obj->dmasize, 1,
+ obj->dmasize, 0, BUS_DMA_WAITOK, &obj->dmamap);
+ if (error)
+ goto unmap;
+ error = bus_dmamap_load(obj->dmat, obj->dmamap, obj->vaddr,
+ obj->dmasize, NULL, BUS_DMA_WAITOK);
+ if (error)
+ goto destroy;
+
+ memset(obj->vaddr, 0, obj->dmasize);
+
+ drm_gem_private_object_init(ddev, &obj->base, size);
+
+ return obj;
+
+destroy:
+ bus_dmamap_destroy(obj->dmat, obj->dmamap);
+unmap:
+ bus_dmamem_unmap(obj->dmat, obj->vaddr, obj->dmasize);
+free:
+ bus_dmamem_free(obj->dmat, obj->dmasegs, nsegs);
+failed:
+ kmem_free(obj, sizeof(*obj));
+
+ return NULL;
+}
+
+static void
+drm_gem_cma_obj_free(struct drm_gem_cma_object *obj)
+{
+ bus_dmamap_unload(obj->dmat, obj->dmamap);
+ bus_dmamap_destroy(obj->dmat, obj->dmamap);
+ bus_dmamem_unmap(obj->dmat, obj->vaddr, obj->dmasize);
+ bus_dmamem_free(obj->dmat, obj->dmasegs, 1);
+ kmem_free(obj, sizeof(*obj));
+}
+
+void
+drm_gem_cma_free_object(struct drm_gem_object *gem_obj)
+{
+ struct drm_gem_cma_object *obj = to_drm_gem_cma_obj(gem_obj);
+
+ drm_gem_free_mmap_offset(gem_obj);
+ drm_gem_object_release(gem_obj);
+ drm_gem_cma_obj_free(obj);
+}
+
+int
+drm_gem_cma_dumb_create(struct drm_file *file_priv, struct drm_device *ddev,
+ struct drm_mode_create_dumb *args)
+{
+ struct drm_gem_cma_object *obj;
+ uint32_t handle;
+ int error;
+
+ args->pitch = args->width * ((args->bpp + 7) / 8);
+ args->size = args->pitch * args->height;
+ args->size = roundup(args->size, PAGE_SIZE);
+ args->handle = 0;
+
+ obj = drm_gem_cma_create(ddev, args->size);
+ if (obj == NULL)
+ return -ENOMEM;
+
+ error = drm_gem_handle_create(file_priv, &obj->base, &handle);
+ drm_gem_object_unreference_unlocked(&obj->base);
+ if (error) {
+ drm_gem_cma_obj_free(obj);
+ return error;
+ }
+
+ args->handle = handle;
+
+ return 0;
+}
+
+int
+drm_gem_cma_dumb_map_offset(struct drm_file *file_priv, struct drm_device *ddev,
+ uint32_t handle, uint64_t *offset)
+{
+ struct drm_gem_object *gem_obj;
+ struct drm_gem_cma_object *obj;
+ int error;
+
+ gem_obj = drm_gem_object_lookup(ddev, file_priv, handle);
+ if (gem_obj == NULL)
+ return -ENOENT;
+
+ obj = to_drm_gem_cma_obj(gem_obj);
+
+ if (drm_vma_node_has_offset(&obj->base.vma_node) == 0) {
+ error = drm_gem_create_mmap_offset(&obj->base);
+ if (error)
+ goto done;
+ } else {
+ error = 0;
+ }
+
+ *offset = drm_vma_node_offset_addr(&obj->base.vma_node);
+
+done:
+ drm_gem_object_unreference_unlocked(&obj->base);
+
+ return error;
+}
+
+static int
+drm_gem_cma_fault(struct uvm_faultinfo *ufi, vaddr_t vaddr,
+ struct vm_page **pps, int npages, int centeridx, vm_prot_t access_type,
+ int flags)
+{
+ struct vm_map_entry *entry = ufi->entry;
+ struct uvm_object *uobj = entry->object.uvm_obj;
+ struct drm_gem_object *gem_obj =
+ container_of(uobj, struct drm_gem_object, gemo_uvmobj);
+ struct drm_gem_cma_object *obj = to_drm_gem_cma_obj(gem_obj);
+ off_t curr_offset;
+ vaddr_t curr_va;
+ paddr_t paddr, mdpgno;
+ u_int mmapflags;
+ int lcv, retval;
+ vm_prot_t mapprot;
+
+ if (UVM_ET_ISCOPYONWRITE(entry))
+ return -EIO;
+
+ curr_offset = entry->offset + (vaddr - entry->start);
+ curr_va = vaddr;
+
+ retval = 0;
+ for (lcv = 0; lcv < npages; lcv++, curr_offset += PAGE_SIZE,
+ curr_va += PAGE_SIZE) {
+ if ((flags & PGO_ALLPAGES) == 0 && lcv != centeridx)
+ continue;
+ if (pps[lcv] == PGO_DONTCARE)
+ continue;
+
+ mdpgno = bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1,
+ curr_offset, access_type, BUS_DMA_PREFETCHABLE);
+ if (mdpgno == -1) {
+ retval = -EIO;
+ break;
+ }
+ paddr = pmap_phys_address(mdpgno);
+ mmapflags = pmap_mmap_flags(mdpgno);
+ mapprot = ufi->entry->protection;
+
+ if (pmap_enter(ufi->orig_map->pmap, curr_va, paddr, mapprot,
+ PMAP_CANFAIL | mapprot | mmapflags) != 0) {
+ pmap_update(ufi->orig_map->pmap);
+ uvmfault_unlockall(ufi, ufi->entry->aref.ar_amap, uobj);
+ uvm_wait("drm_gem_cma_fault");
+ return -ERESTART;
+ }
+ }
+
+ pmap_update(ufi->orig_map->pmap);
+ uvmfault_unlockall(ufi, ufi->entry->aref.ar_amap, uobj);
+
+ return retval;
+}
+
+const struct uvm_pagerops drm_gem_cma_uvm_ops = {
+ .pgo_reference = drm_gem_pager_reference,
+ .pgo_detach = drm_gem_pager_detach,
+ .pgo_fault = drm_gem_cma_fault,
+};
diff -r 10009041fe74 -r 3cfd334b7868 sys/external/bsd/drm2/drm/files.drmkms
--- a/sys/external/bsd/drm2/drm/files.drmkms Tue Dec 26 12:43:59 2017 +0000
+++ b/sys/external/bsd/drm2/drm/files.drmkms Tue Dec 26 14:53:12 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.drmkms,v 1.13 2016/02/24 22:04:15 skrll Exp $
+# $NetBSD: files.drmkms,v 1.14 2017/12/26 14:53:12 jmcneill Exp $
include "external/bsd/drm2/linux/files.drmkms_linux"
@@ -68,6 +68,7 @@
file external/bsd/drm2/drm/drm_vma_manager.c drmkms
file external/bsd/drm2/drm/drm_gem_vm.c drmkms
+file external/bsd/drm2/drm/drm_gem_cma_helper.c drmkms
file external/bsd/drm2/drm/drm_module.c drmkms
file external/bsd/drm2/drm/drm_sysctl.c drmkms
@@ -75,4 +76,4 @@
define drmfb: genfb
file external/bsd/drm2/drm/drmfb.c drmfb
-include "external/bsd/drm2/ttm/files.ttm"
+include "external/bsd/drm2/ttm/files.ttm"
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