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 void spu_hw_signal1_write(struct spu_context *ctx, u32 data) 139 { 140 out_be32(&ctx->spu->problem->signal_notify1, data); 141 } 142 143 static void spu_hw_signal2_write(struct spu_context *ctx, u32 data) 144 { 145 out_be32(&ctx->spu->problem->signal_notify2, data); 146 } 147 148 static void spu_hw_signal1_type_set(struct spu_context *ctx, u64 val) 149 { 150 struct spu *spu = ctx->spu; 151 struct spu_priv2 __iomem *priv2 = spu->priv2; 152 u64 tmp; 153 154 spin_lock_irq(&spu->register_lock); 155 tmp = in_be64(&priv2->spu_cfg_RW); 156 if (val) 157 tmp |= 1; 158 else 159 tmp &= ~1; 160 out_be64(&priv2->spu_cfg_RW, tmp); 161 spin_unlock_irq(&spu->register_lock); 162 } 163 164 static u64 spu_hw_signal1_type_get(struct spu_context *ctx) 165 { 166 return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0); 167 } 168 169 static void spu_hw_signal2_type_set(struct spu_context *ctx, u64 val) 170 { 171 struct spu *spu = ctx->spu; 172 struct spu_priv2 __iomem *priv2 = spu->priv2; 173 u64 tmp; 174 175 spin_lock_irq(&spu->register_lock); 176 tmp = in_be64(&priv2->spu_cfg_RW); 177 if (val) 178 tmp |= 2; 179 else 180 tmp &= ~2; 181 out_be64(&priv2->spu_cfg_RW, tmp); 182 spin_unlock_irq(&spu->register_lock); 183 } 184 185 static u64 spu_hw_signal2_type_get(struct spu_context *ctx) 186 { 187 return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0); 188 } 189 190 static u32 spu_hw_npc_read(struct spu_context *ctx) 191 { 192 return in_be32(&ctx->spu->problem->spu_npc_RW); 193 } 194 195 static void spu_hw_npc_write(struct spu_context *ctx, u32 val) 196 { 197 out_be32(&ctx->spu->problem->spu_npc_RW, val); 198 } 199 200 static u32 spu_hw_status_read(struct spu_context *ctx) 201 { 202 return in_be32(&ctx->spu->problem->spu_status_R); 203 } 204 205 static char *spu_hw_get_ls(struct spu_context *ctx) 206 { 207 return ctx->spu->local_store; 208 } 209 210 static void spu_hw_runcntl_write(struct spu_context *ctx, u32 val) 211 { 212 spin_lock_irq(&ctx->spu->register_lock); 213 if (val & SPU_RUNCNTL_ISOLATE) 214 out_be64(&ctx->spu->priv2->spu_privcntl_RW, 4LL); 215 out_be32(&ctx->spu->problem->spu_runcntl_RW, val); 216 spin_unlock_irq(&ctx->spu->register_lock); 217 } 218 219 static void spu_hw_runcntl_stop(struct spu_context *ctx) 220 { 221 spin_lock_irq(&ctx->spu->register_lock); 222 out_be32(&ctx->spu->problem->spu_runcntl_RW, SPU_RUNCNTL_STOP); 223 while (in_be32(&ctx->spu->problem->spu_status_R) & SPU_STATUS_RUNNING) 224 cpu_relax(); 225 spin_unlock_irq(&ctx->spu->register_lock); 226 } 227 228 static int spu_hw_set_mfc_query(struct spu_context * ctx, u32 mask, u32 mode) 229 { 230 struct spu_problem __iomem *prob = ctx->spu->problem; 231 int ret; 232 233 spin_lock_irq(&ctx->spu->register_lock); 234 ret = -EAGAIN; 235 if (in_be32(&prob->dma_querytype_RW)) 236 goto out; 237 ret = 0; 238 out_be32(&prob->dma_querymask_RW, mask); 239 out_be32(&prob->dma_querytype_RW, mode); 240 out: 241 spin_unlock_irq(&ctx->spu->register_lock); 242 return ret; 243 } 244 245 static u32 spu_hw_read_mfc_tagstatus(struct spu_context * ctx) 246 { 247 return in_be32(&ctx->spu->problem->dma_tagstatus_R); 248 } 249 250 static u32 spu_hw_get_mfc_free_elements(struct spu_context *ctx) 251 { 252 return in_be32(&ctx->spu->problem->dma_qstatus_R); 253 } 254 255 static int spu_hw_send_mfc_command(struct spu_context *ctx, 256 struct mfc_dma_command *cmd) 257 { 258 u32 status; 259 struct spu_problem __iomem *prob = ctx->spu->problem; 260 261 spin_lock_irq(&ctx->spu->register_lock); 262 out_be32(&prob->mfc_lsa_W, cmd->lsa); 263 out_be64(&prob->mfc_ea_W, cmd->ea); 264 out_be32(&prob->mfc_union_W.by32.mfc_size_tag32, 265 cmd->size << 16 | cmd->tag); 266 out_be32(&prob->mfc_union_W.by32.mfc_class_cmd32, 267 cmd->class << 16 | cmd->cmd); 268 status = in_be32(&prob->mfc_union_W.by32.mfc_class_cmd32); 269 spin_unlock_irq(&ctx->spu->register_lock); 270 271 switch (status & 0xffff) { 272 case 0: 273 return 0; 274 case 2: 275 return -EAGAIN; 276 default: 277 return -EINVAL; 278 } 279 } 280 281 struct spu_context_ops spu_hw_ops = { 282 .mbox_read = spu_hw_mbox_read, 283 .mbox_stat_read = spu_hw_mbox_stat_read, 284 .mbox_stat_poll = spu_hw_mbox_stat_poll, 285 .ibox_read = spu_hw_ibox_read, 286 .wbox_write = spu_hw_wbox_write, 287 .signal1_write = spu_hw_signal1_write, 288 .signal2_write = spu_hw_signal2_write, 289 .signal1_type_set = spu_hw_signal1_type_set, 290 .signal1_type_get = spu_hw_signal1_type_get, 291 .signal2_type_set = spu_hw_signal2_type_set, 292 .signal2_type_get = spu_hw_signal2_type_get, 293 .npc_read = spu_hw_npc_read, 294 .npc_write = spu_hw_npc_write, 295 .status_read = spu_hw_status_read, 296 .get_ls = spu_hw_get_ls, 297 .runcntl_write = spu_hw_runcntl_write, 298 .runcntl_stop = spu_hw_runcntl_stop, 299 .set_mfc_query = spu_hw_set_mfc_query, 300 .read_mfc_tagstatus = spu_hw_read_mfc_tagstatus, 301 .get_mfc_free_elements = spu_hw_get_mfc_free_elements, 302 .send_mfc_command = spu_hw_send_mfc_command, 303 }; 304