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      1 /*
      2  * Copyright  2019 Broadcom
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     21  * IN THE SOFTWARE.
     22  */
     23 
     24 #ifndef V3D_LIMITS_H
     25 #define V3D_LIMITS_H
     26 
     27 /* Number of channels a QPU thread executes in parallel.  Also known as
     28  * gl_SubGroupSizeARB.
     29  */
     30 #define V3D_CHANNELS 16
     31 
     32 #define V3D_MAX_FS_INPUTS 64
     33 #define V3D_MAX_GS_INPUTS 64
     34 #define V3D_MAX_VS_INPUTS 64
     35 #define V3D_MAX_ANY_STAGE_INPUTS MAX3(V3D_MAX_VS_INPUTS, \
     36                                       V3D_MAX_GS_INPUTS, \
     37                                       V3D_MAX_FS_INPUTS)
     38 
     39 /* For now we need to maintain a different limits for OpenGL and Vulkan due
     40  * some OpenGL CTS tests hitting register allocation when trying to use all
     41  * the texture available.
     42  *
     43  * FIXME: nir_schedule should be able to handle that. When fixed it would be
     44  * simpler to keep just one limit
     45  */
     46 #define V3D_VULKAN_MAX_TEXTURE_SAMPLERS 24
     47 #define V3D_OPENGL_MAX_TEXTURE_SAMPLERS 16
     48 
     49 /* Not specifically a hardware limit, just coordination between compiler and
     50  * driver.
     51  */
     52 #define V3D_MAX_TEXTURE_SAMPLERS MAX2(V3D_VULKAN_MAX_TEXTURE_SAMPLERS, \
     53                                       V3D_OPENGL_MAX_TEXTURE_SAMPLERS)
     54 
     55 /* The HW can do 16384 (15), but we run into hangs when we expose that. */
     56 #define V3D_MAX_MIP_LEVELS 13
     57 
     58 #define V3D_MAX_SAMPLES 4
     59 
     60 #define V3D_MAX_DRAW_BUFFERS 4
     61 
     62 #define V3D_MAX_POINT_SIZE 512.0f
     63 #define V3D_MAX_LINE_WIDTH 32
     64 
     65 #define V3D_MAX_BUFFER_RANGE (1 << 27)
     66 
     67 #endif /* V3D_LIMITS_H */
     68