1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2 /************************************************************************** 3 * 4 * Copyright 2021 VMware, Inc., Palo Alto, CA., USA 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #include <linux/vmalloc.h> 29 #include "vmwgfx_devcaps.h" 30 31 #include "vmwgfx_drv.h" 32 33 34 struct svga_3d_compat_cap { 35 SVGA3dFifoCapsRecordHeader header; 36 SVGA3dFifoCapPair pairs[SVGA3D_DEVCAP_MAX]; 37 }; 38 39 40 static u32 vmw_mask_legacy_multisample(unsigned int cap, u32 fmt_value) 41 { 42 /* 43 * A version of user-space exists which use MULTISAMPLE_MASKABLESAMPLES 44 * to check the sample count supported by virtual device. Since there 45 * never was support for multisample count for backing MOB return 0. 46 * 47 * MULTISAMPLE_MASKABLESAMPLES devcap is marked as deprecated by virtual 48 * device. 49 */ 50 if (cap == SVGA3D_DEVCAP_DEAD5) 51 return 0; 52 53 return fmt_value; 54 } 55 56 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce, 57 size_t size) 58 { 59 struct svga_3d_compat_cap *compat_cap = 60 (struct svga_3d_compat_cap *) bounce; 61 unsigned int i; 62 size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs); 63 unsigned int max_size; 64 65 if (size < pair_offset) 66 return -EINVAL; 67 68 max_size = (size - pair_offset) / sizeof(SVGA3dFifoCapPair); 69 70 if (max_size > SVGA3D_DEVCAP_MAX) 71 max_size = SVGA3D_DEVCAP_MAX; 72 73 compat_cap->header.length = 74 (pair_offset + max_size * sizeof(SVGA3dFifoCapPair)) / sizeof(u32); 75 compat_cap->header.type = SVGA3D_FIFO_CAPS_RECORD_DEVCAPS; 76 77 for (i = 0; i < max_size; ++i) { 78 compat_cap->pairs[i][0] = i; 79 compat_cap->pairs[i][1] = vmw_mask_legacy_multisample 80 (i, dev_priv->devcaps[i]); 81 } 82 83 return 0; 84 } 85 86 int vmw_devcaps_create(struct vmw_private *vmw) 87 { 88 bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS); 89 uint32_t i; 90 91 if (gb_objects) { 92 vmw->devcaps = vzalloc(sizeof(uint32_t) * SVGA3D_DEVCAP_MAX); 93 if (!vmw->devcaps) 94 return -ENOMEM; 95 for (i = 0; i < SVGA3D_DEVCAP_MAX; ++i) { 96 vmw_write(vmw, SVGA_REG_DEV_CAP, i); 97 vmw->devcaps[i] = vmw_read(vmw, SVGA_REG_DEV_CAP); 98 } 99 } 100 return 0; 101 } 102 103 void vmw_devcaps_destroy(struct vmw_private *vmw) 104 { 105 vfree(vmw->devcaps); 106 vmw->devcaps = NULL; 107 } 108 109 110 uint32 vmw_devcaps_size(const struct vmw_private *vmw, 111 bool gb_aware) 112 { 113 bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS); 114 if (gb_objects && gb_aware) 115 return SVGA3D_DEVCAP_MAX * sizeof(uint32_t); 116 else if (gb_objects) 117 return sizeof(struct svga_3d_compat_cap) + 118 sizeof(uint32_t); 119 else if (vmw->fifo_mem != NULL) 120 return (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) * 121 sizeof(uint32_t); 122 else 123 return 0; 124 } 125 126 int vmw_devcaps_copy(struct vmw_private *vmw, bool gb_aware, 127 void *dst, uint32_t dst_size) 128 { 129 int ret; 130 bool gb_objects = !!(vmw->capabilities & SVGA_CAP_GBOBJECTS); 131 if (gb_objects && gb_aware) { 132 memcpy(dst, vmw->devcaps, dst_size); 133 } else if (gb_objects) { 134 ret = vmw_fill_compat_cap(vmw, dst, dst_size); 135 if (unlikely(ret != 0)) 136 return ret; 137 } else if (vmw->fifo_mem) { 138 u32 *fifo_mem = vmw->fifo_mem; 139 memcpy(dst, &fifo_mem[SVGA_FIFO_3D_CAPS], dst_size); 140 } else 141 return -EINVAL; 142 return 0; 143 } 144