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/* 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;
}
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