1// SPDX-License-Identifier: GPL-2.0+
  2// Copyright 2019 IBM Corp.
  3#include <linux/sched/mm.h>
  4#include "trace.h"
  5#include "ocxl_internal.h"
  6
  7int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset,
  8				enum ocxl_endian endian, u32 *val)
  9{
 10	if (offset > afu->config.global_mmio_size - 4)
 11		return -EINVAL;
 12
 13#ifdef __BIG_ENDIAN__
 14	if (endian == OCXL_HOST_ENDIAN)
 15		endian = OCXL_BIG_ENDIAN;
 16#endif
 17
 18	switch (endian) {
 19	case OCXL_BIG_ENDIAN:
 20		*val = readl_be((char *)afu->global_mmio_ptr + offset);
 21		break;
 22
 23	default:
 24		*val = readl((char *)afu->global_mmio_ptr + offset);
 25		break;
 26	}
 27
 28	return 0;
 29}
 30EXPORT_SYMBOL_GPL(ocxl_global_mmio_read32);
 31
 32int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset,
 33				enum ocxl_endian endian, u64 *val)
 34{
 35	if (offset > afu->config.global_mmio_size - 8)
 36		return -EINVAL;
 37
 38#ifdef __BIG_ENDIAN__
 39	if (endian == OCXL_HOST_ENDIAN)
 40		endian = OCXL_BIG_ENDIAN;
 41#endif
 42
 43	switch (endian) {
 44	case OCXL_BIG_ENDIAN:
 45		*val = readq_be((char *)afu->global_mmio_ptr + offset);
 46		break;
 47
 48	default:
 49		*val = readq((char *)afu->global_mmio_ptr + offset);
 50		break;
 51	}
 52
 53	return 0;
 54}
 55EXPORT_SYMBOL_GPL(ocxl_global_mmio_read64);
 56
 57int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset,
 58				enum ocxl_endian endian, u32 val)
 59{
 60	if (offset > afu->config.global_mmio_size - 4)
 61		return -EINVAL;
 62
 63#ifdef __BIG_ENDIAN__
 64	if (endian == OCXL_HOST_ENDIAN)
 65		endian = OCXL_BIG_ENDIAN;
 66#endif
 67
 68	switch (endian) {
 69	case OCXL_BIG_ENDIAN:
 70		writel_be(val, (char *)afu->global_mmio_ptr + offset);
 71		break;
 72
 73	default:
 74		writel(val, (char *)afu->global_mmio_ptr + offset);
 75		break;
 76	}
 77
 78
 79	return 0;
 80}
 81EXPORT_SYMBOL_GPL(ocxl_global_mmio_write32);
 82
 83int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset,
 84				enum ocxl_endian endian, u64 val)
 85{
 86	if (offset > afu->config.global_mmio_size - 8)
 87		return -EINVAL;
 88
 89#ifdef __BIG_ENDIAN__
 90	if (endian == OCXL_HOST_ENDIAN)
 91		endian = OCXL_BIG_ENDIAN;
 92#endif
 93
 94	switch (endian) {
 95	case OCXL_BIG_ENDIAN:
 96		writeq_be(val, (char *)afu->global_mmio_ptr + offset);
 97		break;
 98
 99	default:
100		writeq(val, (char *)afu->global_mmio_ptr + offset);
101		break;
102	}
103
104
105	return 0;
106}
107EXPORT_SYMBOL_GPL(ocxl_global_mmio_write64);
108
109int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset,
110				enum ocxl_endian endian, u32 mask)
111{
112	u32 tmp;
113
114	if (offset > afu->config.global_mmio_size - 4)
115		return -EINVAL;
116
117#ifdef __BIG_ENDIAN__
118	if (endian == OCXL_HOST_ENDIAN)
119		endian = OCXL_BIG_ENDIAN;
120#endif
121
122	switch (endian) {
123	case OCXL_BIG_ENDIAN:
124		tmp = readl_be((char *)afu->global_mmio_ptr + offset);
125		tmp |= mask;
126		writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
127		break;
128
129	default:
130		tmp = readl((char *)afu->global_mmio_ptr + offset);
131		tmp |= mask;
132		writel(tmp, (char *)afu->global_mmio_ptr + offset);
133		break;
134	}
135
136	return 0;
137}
138EXPORT_SYMBOL_GPL(ocxl_global_mmio_set32);
139
140int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset,
141				enum ocxl_endian endian, u64 mask)
142{
143	u64 tmp;
144
145	if (offset > afu->config.global_mmio_size - 8)
146		return -EINVAL;
147
148#ifdef __BIG_ENDIAN__
149	if (endian == OCXL_HOST_ENDIAN)
150		endian = OCXL_BIG_ENDIAN;
151#endif
152
153	switch (endian) {
154	case OCXL_BIG_ENDIAN:
155		tmp = readq_be((char *)afu->global_mmio_ptr + offset);
156		tmp |= mask;
157		writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
158		break;
159
160	default:
161		tmp = readq((char *)afu->global_mmio_ptr + offset);
162		tmp |= mask;
163		writeq(tmp, (char *)afu->global_mmio_ptr + offset);
164		break;
165	}
166
167	return 0;
168}
169EXPORT_SYMBOL_GPL(ocxl_global_mmio_set64);
170
171int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset,
172				enum ocxl_endian endian, u32 mask)
173{
174	u32 tmp;
175
176	if (offset > afu->config.global_mmio_size - 4)
177		return -EINVAL;
178
179#ifdef __BIG_ENDIAN__
180	if (endian == OCXL_HOST_ENDIAN)
181		endian = OCXL_BIG_ENDIAN;
182#endif
183
184	switch (endian) {
185	case OCXL_BIG_ENDIAN:
186		tmp = readl_be((char *)afu->global_mmio_ptr + offset);
187		tmp &= ~mask;
188		writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
189		break;
190
191	default:
192		tmp = readl((char *)afu->global_mmio_ptr + offset);
193		tmp &= ~mask;
194		writel(tmp, (char *)afu->global_mmio_ptr + offset);
195		break;
196	}
197
198
199	return 0;
200}
201EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear32);
202
203int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset,
204				enum ocxl_endian endian, u64 mask)
205{
206	u64 tmp;
207
208	if (offset > afu->config.global_mmio_size - 8)
209		return -EINVAL;
210
211#ifdef __BIG_ENDIAN__
212	if (endian == OCXL_HOST_ENDIAN)
213		endian = OCXL_BIG_ENDIAN;
214#endif
215
216	switch (endian) {
217	case OCXL_BIG_ENDIAN:
218		tmp = readq_be((char *)afu->global_mmio_ptr + offset);
219		tmp &= ~mask;
220		writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
221		break;
222
223	default:
224		tmp = readq((char *)afu->global_mmio_ptr + offset);
225		tmp &= ~mask;
226		writeq(tmp, (char *)afu->global_mmio_ptr + offset);
227		break;
228	}
229
230	writeq(tmp, (char *)afu->global_mmio_ptr + offset);
231
232	return 0;
233}
234EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear64);