summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c b/drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c
new file mode 100644
index 000000000..829df395c
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c
@@ -0,0 +1,142 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/**************************************************************************
+ *
+ * Copyright 2021 VMware, Inc., Palo Alto, CA., USA
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "vmwgfx_devcaps.h"
+
+#include "vmwgfx_drv.h"
+
+
+struct svga_3d_compat_cap {
+ SVGA3dFifoCapsRecordHeader header;
+ SVGA3dFifoCapPair pairs[SVGA3D_DEVCAP_MAX];
+};
+
+
+static u32 vmw_mask_legacy_multisample(unsigned int cap, u32 fmt_value)
+{
+ /*
+ * A version of user-space exists which use MULTISAMPLE_MASKABLESAMPLES
+ * to check the sample count supported by virtual device. Since there
+ * never was support for multisample count for backing MOB return 0.
+ *
+ * MULTISAMPLE_MASKABLESAMPLES devcap is marked as deprecated by virtual
+ * device.
+ */
+ if (cap == SVGA3D_DEVCAP_DEAD5)
+ return 0;
+
+ return fmt_value;
+}
+
+static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
+ size_t size)
+{
+ struct svga_3d_compat_cap *compat_cap =
+ (struct svga_3d_compat_cap *) bounce;
+ unsigned int i;
+ size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
+ unsigned int max_size;
+
+ if (size < pair_offset)
+ return -EINVAL;
+
+ max_size = (size - pair_offset) / sizeof(SVGA3dFifoCapPair);
+
+ if (max_size > SVGA3D_DEVCAP_MAX)
+ max_size = SVGA3D_DEVCAP_MAX;
+
+ compat_cap->header.length =
+ (pair_offset + max_size * sizeof(SVGA3dFifoCapPair)) / sizeof(u32);
+ compat_cap->header.type = SVGA3D_FIFO_CAPS_RECORD_DEVCAPS;
+
+ for (i = 0; i < max_size; ++i) {
+ compat_cap->pairs[i][0] = i;
+ compat_cap->pairs[i][1] = vmw_mask_legacy_multisample
+ (i, dev_priv->devcaps[i]);
+ }
+
+ return 0;
+}
+
+int vmw_devcaps_create(struct vmw_private *vmw)
+{
+ bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS);
+ uint32_t i;
+
+ if (gb_objects) {
+ vmw->devcaps = vzalloc(sizeof(uint32_t) * SVGA3D_DEVCAP_MAX);
+ if (!vmw->devcaps)
+ return -ENOMEM;
+ for (i = 0; i < SVGA3D_DEVCAP_MAX; ++i) {
+ vmw_write(vmw, SVGA_REG_DEV_CAP, i);
+ vmw->devcaps[i] = vmw_read(vmw, SVGA_REG_DEV_CAP);
+ }
+ }
+ return 0;
+}
+
+void vmw_devcaps_destroy(struct vmw_private *vmw)
+{
+ vfree(vmw->devcaps);
+ vmw->devcaps = NULL;
+}
+
+
+uint32 vmw_devcaps_size(const struct vmw_private *vmw,
+ bool gb_aware)
+{
+ bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS);
+ if (gb_objects && gb_aware)
+ return SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
+ else if (gb_objects)
+ return sizeof(struct svga_3d_compat_cap) +
+ sizeof(uint32_t);
+ else if (vmw->fifo_mem != NULL)
+ return (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
+ sizeof(uint32_t);
+ else
+ return 0;
+}
+
+int vmw_devcaps_copy(struct vmw_private *vmw, bool gb_aware,
+ void *dst, uint32_t dst_size)
+{
+ int ret;
+ bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS);
+ if (gb_objects && gb_aware) {
+ memcpy(dst, vmw->devcaps, dst_size);
+ } else if (gb_objects) {
+ ret = vmw_fill_compat_cap(vmw, dst, dst_size);
+ if (unlikely(ret != 0))
+ return ret;
+ } else if (vmw->fifo_mem) {
+ u32 *fifo_mem = vmw->fifo_mem;
+ memcpy(dst, &fifo_mem[SVGA_FIFO_3D_CAPS], dst_size);
+ } else
+ return -EINVAL;
+ return 0;
+}