Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 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/config.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/mm.h> |
| 27 | #include <linux/vmalloc.h> |
| 28 | #include <linux/smp.h> |
| 29 | #include <linux/smp_lock.h> |
| 30 | #include <linux/stddef.h> |
| 31 | #include <linux/unistd.h> |
| 32 | |
| 33 | #include <asm/io.h> |
| 34 | #include <asm/spu.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 int spu_hw_ibox_read(struct spu_context *ctx, u32 * data) |
| 62 | { |
| 63 | struct spu *spu = ctx->spu; |
| 64 | struct spu_problem __iomem *prob = spu->problem; |
| 65 | struct spu_priv1 __iomem *priv1 = spu->priv1; |
| 66 | struct spu_priv2 __iomem *priv2 = spu->priv2; |
| 67 | int ret; |
| 68 | |
| 69 | spin_lock_irq(&spu->register_lock); |
| 70 | if (in_be32(&prob->mb_stat_R) & 0xff0000) { |
| 71 | /* read the first available word */ |
| 72 | *data = in_be64(&priv2->puint_mb_R); |
| 73 | ret = 4; |
| 74 | } else { |
| 75 | /* make sure we get woken up by the interrupt */ |
| 76 | out_be64(&priv1->int_mask_class2_RW, |
| 77 | in_be64(&priv1->int_mask_class2_RW) | 0x1); |
| 78 | ret = 0; |
| 79 | } |
| 80 | spin_unlock_irq(&spu->register_lock); |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | static int spu_hw_wbox_write(struct spu_context *ctx, u32 data) |
| 85 | { |
| 86 | struct spu *spu = ctx->spu; |
| 87 | struct spu_problem __iomem *prob = spu->problem; |
| 88 | struct spu_priv1 __iomem *priv1 = spu->priv1; |
| 89 | int ret; |
| 90 | |
| 91 | spin_lock_irq(&spu->register_lock); |
| 92 | if (in_be32(&prob->mb_stat_R) & 0x00ff00) { |
| 93 | /* we have space to write wbox_data to */ |
| 94 | out_be32(&prob->spu_mb_W, data); |
| 95 | ret = 4; |
| 96 | } else { |
| 97 | /* make sure we get woken up by the interrupt when space |
| 98 | becomes available */ |
| 99 | out_be64(&priv1->int_mask_class2_RW, |
| 100 | in_be64(&priv1->int_mask_class2_RW) | 0x10); |
| 101 | ret = 0; |
| 102 | } |
| 103 | spin_unlock_irq(&spu->register_lock); |
| 104 | return ret; |
| 105 | } |
| 106 | |
| 107 | static u32 spu_hw_signal1_read(struct spu_context *ctx) |
| 108 | { |
| 109 | return in_be32(&ctx->spu->problem->signal_notify1); |
| 110 | } |
| 111 | |
| 112 | static void spu_hw_signal1_write(struct spu_context *ctx, u32 data) |
| 113 | { |
| 114 | out_be32(&ctx->spu->problem->signal_notify1, data); |
| 115 | } |
| 116 | |
| 117 | static u32 spu_hw_signal2_read(struct spu_context *ctx) |
| 118 | { |
| 119 | return in_be32(&ctx->spu->problem->signal_notify1); |
| 120 | } |
| 121 | |
| 122 | static void spu_hw_signal2_write(struct spu_context *ctx, u32 data) |
| 123 | { |
| 124 | out_be32(&ctx->spu->problem->signal_notify2, data); |
| 125 | } |
| 126 | |
| 127 | static void spu_hw_signal1_type_set(struct spu_context *ctx, u64 val) |
| 128 | { |
| 129 | struct spu *spu = ctx->spu; |
| 130 | struct spu_priv2 __iomem *priv2 = spu->priv2; |
| 131 | u64 tmp; |
| 132 | |
| 133 | spin_lock_irq(&spu->register_lock); |
| 134 | tmp = in_be64(&priv2->spu_cfg_RW); |
| 135 | if (val) |
| 136 | tmp |= 1; |
| 137 | else |
| 138 | tmp &= ~1; |
| 139 | out_be64(&priv2->spu_cfg_RW, tmp); |
| 140 | spin_unlock_irq(&spu->register_lock); |
| 141 | } |
| 142 | |
| 143 | static u64 spu_hw_signal1_type_get(struct spu_context *ctx) |
| 144 | { |
| 145 | return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0); |
| 146 | } |
| 147 | |
| 148 | static void spu_hw_signal2_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 |= 2; |
| 158 | else |
| 159 | tmp &= ~2; |
| 160 | out_be64(&priv2->spu_cfg_RW, tmp); |
| 161 | spin_unlock_irq(&spu->register_lock); |
| 162 | } |
| 163 | |
| 164 | static u64 spu_hw_signal2_type_get(struct spu_context *ctx) |
| 165 | { |
| 166 | return ((in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0); |
| 167 | } |
| 168 | |
| 169 | static u32 spu_hw_npc_read(struct spu_context *ctx) |
| 170 | { |
| 171 | return in_be32(&ctx->spu->problem->spu_npc_RW); |
| 172 | } |
| 173 | |
| 174 | static void spu_hw_npc_write(struct spu_context *ctx, u32 val) |
| 175 | { |
| 176 | out_be32(&ctx->spu->problem->spu_npc_RW, val); |
| 177 | } |
| 178 | |
| 179 | static u32 spu_hw_status_read(struct spu_context *ctx) |
| 180 | { |
| 181 | return in_be32(&ctx->spu->problem->spu_status_R); |
| 182 | } |
| 183 | |
| 184 | static char *spu_hw_get_ls(struct spu_context *ctx) |
| 185 | { |
| 186 | return ctx->spu->local_store; |
| 187 | } |
| 188 | |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame^] | 189 | static void spu_hw_runcntl_write(struct spu_context *ctx, u32 val) |
| 190 | { |
| 191 | eieio(); |
| 192 | out_be32(&ctx->spu->problem->spu_runcntl_RW, val); |
| 193 | } |
| 194 | |
| 195 | static void spu_hw_runcntl_stop(struct spu_context *ctx) |
| 196 | { |
| 197 | spin_lock_irq(&ctx->spu->register_lock); |
| 198 | out_be32(&ctx->spu->problem->spu_runcntl_RW, SPU_RUNCNTL_STOP); |
| 199 | while (in_be32(&ctx->spu->problem->spu_status_R) & SPU_STATUS_RUNNING) |
| 200 | cpu_relax(); |
| 201 | spin_unlock_irq(&ctx->spu->register_lock); |
| 202 | } |
| 203 | |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 204 | struct spu_context_ops spu_hw_ops = { |
| 205 | .mbox_read = spu_hw_mbox_read, |
| 206 | .mbox_stat_read = spu_hw_mbox_stat_read, |
| 207 | .ibox_read = spu_hw_ibox_read, |
| 208 | .wbox_write = spu_hw_wbox_write, |
| 209 | .signal1_read = spu_hw_signal1_read, |
| 210 | .signal1_write = spu_hw_signal1_write, |
| 211 | .signal2_read = spu_hw_signal2_read, |
| 212 | .signal2_write = spu_hw_signal2_write, |
| 213 | .signal1_type_set = spu_hw_signal1_type_set, |
| 214 | .signal1_type_get = spu_hw_signal1_type_get, |
| 215 | .signal2_type_set = spu_hw_signal2_type_set, |
| 216 | .signal2_type_get = spu_hw_signal2_type_get, |
| 217 | .npc_read = spu_hw_npc_read, |
| 218 | .npc_write = spu_hw_npc_write, |
| 219 | .status_read = spu_hw_status_read, |
| 220 | .get_ls = spu_hw_get_ls, |
Arnd Bergmann | 5110459 | 2005-12-05 22:52:25 -0500 | [diff] [blame^] | 221 | .runcntl_write = spu_hw_runcntl_write, |
| 222 | .runcntl_stop = spu_hw_runcntl_stop, |
Arnd Bergmann | 8b3d666 | 2005-11-15 15:53:52 -0500 | [diff] [blame] | 223 | }; |