1/* $NetBSD: fbmem.h,v 1.5 2021/12/18 23:45:39 riastradh Exp $ */ 2 3/* 4 * Copyright (C) 2010 Francisco Jerez. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining 8 * a copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sublicense, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial 17 * portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 */ 28#include <subdev/fb/regsnv04.h> 29 30#define NV04_PFB_DEBUG_0 0x00100080 31# define NV04_PFB_DEBUG_0_PAGE_MODE 0x00000001 32# define NV04_PFB_DEBUG_0_REFRESH_OFF 0x00000010 33# define NV04_PFB_DEBUG_0_REFRESH_COUNTX64 0x00003f00 34# define NV04_PFB_DEBUG_0_REFRESH_SLOW_CLK 0x00004000 35# define NV04_PFB_DEBUG_0_SAFE_MODE 0x00008000 36# define NV04_PFB_DEBUG_0_ALOM_ENABLE 0x00010000 37# define NV04_PFB_DEBUG_0_CASOE 0x00100000 38# define NV04_PFB_DEBUG_0_CKE_INVERT 0x10000000 39# define NV04_PFB_DEBUG_0_REFINC 0x20000000 40# define NV04_PFB_DEBUG_0_SAVE_POWER_OFF 0x40000000 41#define NV04_PFB_CFG0 0x00100200 42# define NV04_PFB_CFG0_SCRAMBLE 0x20000000 43#define NV04_PFB_CFG1 0x00100204 44#define NV04_PFB_SCRAMBLE(i) (0x00100400 + 4 * (i)) 45 46#define NV10_PFB_REFCTRL 0x00100210 47# define NV10_PFB_REFCTRL_VALID_1 (1 << 31) 48 49static inline struct io_mapping * 50fbmem_init(struct nvkm_device *dev) 51{ 52#ifdef __NetBSD__ 53 return bus_space_io_mapping_create_wc(dev->func->resource_tag(dev, 1), 54 dev->func->resource_addr(dev, 1), 55 dev->func->resource_size(dev, 1)); 56#else 57 return io_mapping_create_wc(dev->func->resource_addr(dev, 1), 58 dev->func->resource_size(dev, 1)); 59#endif 60} 61 62static inline void 63fbmem_fini(struct io_mapping *fb) 64{ 65 io_mapping_free(fb); 66} 67 68#ifdef __NetBSD__ 69/* 70 * XXX Consider using bus_space_reserve/map instead. Don't want to use 71 * bus_space_map because presumably that will eat too much KVA. 72 */ 73 74# define __iomem volatile 75# define ioread32 fake_ioread32 76# define iowrite32 fake_iowrite32 77 78static inline uint32_t 79ioread32(const void __iomem *p) 80{ 81 const uint32_t v = *(const uint32_t __iomem *)p; 82 83 membar_consumer(); 84 85 return v; /* XXX nouveau byte order */ 86} 87 88static inline void 89iowrite32(uint32_t v, void __iomem *p) 90{ 91 92 membar_producer(); 93 *(uint32_t __iomem *)p = v; /* XXX nouveau byte order */ 94} 95#endif 96 97static inline u32 98fbmem_peek(struct io_mapping *fb, u32 off) 99{ 100 u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK); 101 u32 val = ioread32(p + (off & ~PAGE_MASK)); 102#ifdef __NetBSD__ 103 io_mapping_unmap_atomic(fb, __UNVOLATILE(p)); 104#else 105 io_mapping_unmap_atomic(p); 106#endif 107 return val; 108} 109 110static inline void 111fbmem_poke(struct io_mapping *fb, u32 off, u32 val) 112{ 113 u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK); 114 iowrite32(val, p + (off & ~PAGE_MASK)); 115 wmb(); 116#ifdef __NetBSD__ 117 io_mapping_unmap_atomic(fb, __UNVOLATILE(p)); 118#else 119 io_mapping_unmap_atomic(p); 120#endif 121} 122 123static inline bool 124fbmem_readback(struct io_mapping *fb, u32 off, u32 val) 125{ 126 fbmem_poke(fb, off, val); 127 return val == fbmem_peek(fb, off); 128} 129 130#ifdef __NetBSD__ 131# undef __iomem 132# undef ioread32 133# undef iowrite32 134#endif 135