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