diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_devcaps.c | 142 |
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 000000000000..04fc67d53563 --- /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 { + SVGA3dCapsRecordHeader header; + SVGA3dCapPair 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(SVGA3dCapPair); + + if (max_size > SVGA3D_DEVCAP_MAX) + max_size = SVGA3D_DEVCAP_MAX; + + compat_cap->header.length = + (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32); + compat_cap->header.type = SVGA3DCAPS_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; +} |