1 /* hw_ops.c - query/set operations on active SPU context. 2 * 3 * Copyright (C) IBM 2005 4 * Author: Mark Nutter <mnutter@us.ibm.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 */ 20 21 #include <linux/module.h> 22 #include <linux/errno.h> 23 #include <linux/sched.h> 24 #include <linux/kernel.h> 25 #include <linux/mm.h> 26 #include <linux/poll.h> 27 #include <linux/smp.h> 28 #include <linux/smp_lock.h> 29 #include <linux/stddef.h> 30 #include <linux/unistd.h> 31 32 #include <asm/io.h> 33 #include <asm/spu.h> 34 #include <asm/spu_priv1.h> 35 #include <asm/spu_csa.h> 36 #include <asm/mmu_context.h> 37 #include "spufs.h" 38 39 static int spu_hw_mbox_read(struct spu_context *ctx, u32 * data) 40 { 41 struct spu *spu = ctx->spu; 42 struct spu_problem __iomem *prob = spu->problem; 43 u32 mbox_stat; 44 int ret = 0; 45 46 spin_lock_irq(&spu->register_lock); 47 mbox_stat = in_be32(&prob->mb_stat_R); 48 if (mbox_stat & 0x0000ff) { 49 *data = in_be32(&prob->pu_mb_R); 50 ret = 4; 51 } 52 spin_unlock_irq(&spu->register_lock); 53 return ret; 54 } 55 56 static u32 spu_hw_mbox_stat_read(struct spu_context *ctx) 57 { 58 return in_be32(&ctx->spu->problem->mb_stat_R); 59 } 60 61 static unsigned int spu_hw_mbox_stat_poll(struct spu_context *ctx, 62 unsigned int events) 63 { 64 struct spu *spu = ctx->spu; 65 int ret = 0; 66 u32 stat; 67 68 spin_lock_irq(&spu->register_lock); 69 stat = in_be32(&spu->problem->mb_stat_R); 70 71 /* if the requested event is there, return the poll 72 mask, otherwise enable the interrupt to get notified, 73 but first mark any pending interrupts as done so 74 we don't get woken up unnecessarily */ 75 76 if (events & (POLLIN | POLLRDNORM)) { 77 if (stat & 0xff0000) 78 ret |= POLLIN | POLLRDNORM; 79 else { 80 spu_int_stat_clear(spu, 2, 0x1); 81 spu_int_mask_or(spu, 2, 0x1); 82 } 83 } 84 if (events & (POLLOUT | POLLWRNORM)) { 85 if (stat & 0x00ff00) 86 ret = POLLOUT | POLLWRNORM; 87 else { 88 spu_int_stat_clear(spu, 2, 0x10); 89 spu_int_mask_or(spu, 2, 0x10); 90 } 91 } 92 spin_unlock_irq(&spu->register_lock); 93 return ret; 94 } 95 96 static int spu_hw_ibox_read(struct spu_context *ctx, u32 * data) 97 { 98 struct spu *spu = ctx->spu; 99 struct spu_problem __iomem *prob = spu->problem; 100 struct spu_priv2 __iomem *priv2 = spu->priv2; 101 int ret; 102 103 spin_lock_irq(&spu->register_lock); 104 if (in_be32(&prob->mb_stat_R) & 0xff0000) { 105 /* read the first available word */ 106 *data = in_be64(&priv2->puint_mb_R); 107 ret = 4; 108 } else { 109 /* make sure we get woken up by the interrupt */ 110 spu_int_mask_or(spu, 2, 0x1); 111 ret = 0; 112 } 113 spin_unlock_irq(&spu->register_lock); 114 return ret; 115 } 116 117 static int spu_hw_wbox_write(struct spu_context *ctx, u32 data) 118 { 119 struct spu *spu = ctx->spu; 120 struct spu_problem __iomem *prob = spu->problem; 121 int ret; 122 123 spin_lock_irq(&spu->register_lock); 124 if (in_be32(&prob->mb_stat_R) & 0x00ff00) { 125 /* we have space to write wbox_data to */ 126 out_be32(&prob->spu_mb_W, data); 127 ret = 4; 128 } else { 129 /* make sure we get woken up by the interrupt when space 130 becomes available */ 131 spu_int_mask_or(spu, 2, 0x10); 132 ret = 0; 133 } 134 spin_unlock_irq(&spu->register_lock); 135 return ret; 136 } 137 138 static u32 spu_hw_signal1_read(struct spu_context *ctx) 139 { 140 return in_be32(&ctx->spu->problem->signal_notify1); 141 } 142 143 static void spu_hw_signal1_write(struct spu_context *ctx, u32 data) 144 { 145 out_be32(&ctx->spu->problem->signal_notify1, data); 146 } 147 148 static u32 spu_hw_signal2_read(struct spu_context *ctx) 149 { 150 return in_be32(&ctx->spu->problem->signal_notify1); 151 } 152 153 static void spu_hw_signal2_write(struct spu_context *ctx, u32 data) 154 { 155 out_be32(&ctx->spu->problem->signal_notify2, data); 156 } 157 158 static void spu_hw_signal1_type_set(struct spu_context *ctx, u64 val) 159 { 160 struct spu *spu = ctx->spu; 161 struct spu_priv2 __iomem *priv2 = spu->priv2; 162 u64 tmp; 163 164 spin_lock_irq(&spu->register_lock); 165 tmp = in_be64(&priv2->spu_cfg_RW); 166 if (val) 167 tmp |= 1; 168 else 169 tmp &= ~1; 170 out_be64(&priv2->spu_cfg_RW, tmp); 171 spin_unlock_irq(&spu->register_lock); 172 } 173 174 static u64 spu_hw_signal1_type_get(struct spu_context *ctx) 175 { 176 return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0); 177 } 178 179 static void spu_hw_signal2_type_set(struct spu_context *ctx, u64 val) 180 { 181 struct spu *spu = ctx->spu; 182 struct spu_priv2 __iomem *priv2 = spu->priv2; 183 u64 tmp; 184 185 spin_lock_irq(&spu->register_lock); 186 tmp = in_be64(&priv2->spu_cfg_RW); 187 if (val) 188 tmp |= 2; 189 else 190 tmp &= ~2; 191 out_be64(&priv2->spu_cfg_RW, tmp); 192 spin_unlock_irq(&spu->register_lock); 193 } 194 195 static u64 spu_hw_signal2_type_get(struct spu_context *ctx) 196 { 197 return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0); 198 } 199 200 static u32 spu_hw_npc_read(struct spu_context *ctx) 201 { 202 return in_be32(&ctx->spu->problem->spu_npc_RW); 203 } 204 205 static void spu_hw_npc_write(struct spu_context *ctx, u32 val) 206 { 207 out_be32(&ctx->spu->problem->spu_npc_RW, val); 208 } 209 210 static u32 spu_hw_status_read(struct spu_context *ctx) 211 { 212 return in_be32(&ctx->spu->problem->spu_status_R); 213 } 214 215 static char *spu_hw_get_ls(struct spu_context *ctx) 216 { 217 return ctx->spu->local_store; 218 } 219 220 static void spu_hw_runcntl_write(struct spu_context *ctx, u32 val) 221 { 222 eieio(); 223 out_be32(&ctx->spu->problem->spu_runcntl_RW, val); 224 } 225 226 static void spu_hw_runcntl_stop(struct spu_context *ctx) 227 { 228 spin_lock_irq(&ctx->spu->register_lock); 229 out_be32(&ctx->spu->problem->spu_runcntl_RW, SPU_RUNCNTL_STOP); 230 while (in_be32(&ctx->spu->problem->spu_status_R) & SPU_STATUS_RUNNING) 231 cpu_relax(); 232 spin_unlock_irq(&ctx->spu->register_lock); 233 } 234 235 static int spu_hw_set_mfc_query(struct spu_context * ctx, u32 mask, u32 mode) 236 { 237 struct spu_problem __iomem *prob = ctx->spu->problem; 238 int ret; 239 240 spin_lock_irq(&ctx->spu->register_lock); 241 ret = -EAGAIN; 242 if (in_be32(&prob->dma_querytype_RW)) 243 goto out; 244 ret = 0; 245 out_be32(&prob->dma_querymask_RW, mask); 246 out_be32(&prob->dma_querytype_RW, mode); 247 out: 248 spin_unlock_irq(&ctx->spu->register_lock); 249 return ret; 250 } 251 252 static u32 spu_hw_read_mfc_tagstatus(struct spu_context * ctx) 253 { 254 return in_be32(&ctx->spu->problem->dma_tagstatus_R); 255 } 256 257 static u32 spu_hw_get_mfc_free_elements(struct spu_context *ctx) 258 { 259 return in_be32(&ctx->spu->problem->dma_qstatus_R); 260 } 261 262 static int spu_hw_send_mfc_command(struct spu_context *ctx, 263 struct mfc_dma_command *cmd) 264 { 265 u32 status; 266 struct spu_problem __iomem *prob = ctx->spu->problem; 267 268 spin_lock_irq(&ctx->spu->register_lock); 269 out_be32(&prob->mfc_lsa_W, cmd->lsa); 270 out_be64(&prob->mfc_ea_W, cmd->ea); 271 out_be32(&prob->mfc_union_W.by32.mfc_size_tag32, 272 cmd->size << 16 | cmd->tag); 273 out_be32(&prob->mfc_union_W.by32.mfc_class_cmd32, 274 cmd->class << 16 | cmd->cmd); 275 status = in_be32(&prob->mfc_union_W.by32.mfc_class_cmd32); 276 spin_unlock_irq(&ctx->spu->register_lock); 277 278 switch (status & 0xffff) { 279 case 0: 280 return 0; 281 case 2: 282 return -EAGAIN; 283 default: 284 return -EINVAL; 285 } 286 } 287 288 struct spu_context_ops spu_hw_ops = { 289 .mbox_read = spu_hw_mbox_read, 290 .mbox_stat_read = spu_hw_mbox_stat_read, 291 .mbox_stat_poll = spu_hw_mbox_stat_poll, 292 .ibox_read = spu_hw_ibox_read, 293 .wbox_write = spu_hw_wbox_write, 294 .signal1_read = spu_hw_signal1_read, 295 .signal1_write = spu_hw_signal1_write, 296 .signal2_read = spu_hw_signal2_read, 297 .signal2_write = spu_hw_signal2_write, 298 .signal1_type_set = spu_hw_signal1_type_set, 299 .signal1_type_get = spu_hw_signal1_type_get, 300 .signal2_type_set = spu_hw_signal2_type_set, 301 .signal2_type_get = spu_hw_signal2_type_get, 302 .npc_read = spu_hw_npc_read, 303 .npc_write = spu_hw_npc_write, 304 .status_read = spu_hw_status_read, 305 .get_ls = spu_hw_get_ls, 306 .runcntl_write = spu_hw_runcntl_write, 307 .runcntl_stop = spu_hw_runcntl_stop, 308 .set_mfc_query = spu_hw_set_mfc_query, 309 .read_mfc_tagstatus = spu_hw_read_mfc_tagstatus, 310 .get_mfc_free_elements = spu_hw_get_mfc_free_elements, 311 .send_mfc_command = spu_hw_send_mfc_command, 312 }; 313