Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1 | /* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/of.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/io.h> |
| 16 | #include <linux/log2.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/msm_gsi.h> |
| 19 | #include <linux/platform_device.h> |
Skylar Chang | 1feb2a3 | 2016-10-17 10:01:36 -0700 | [diff] [blame] | 20 | #include <linux/delay.h> |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 21 | #include "gsi.h" |
| 22 | #include "gsi_reg.h" |
| 23 | |
| 24 | #define GSI_CMD_TIMEOUT (5*HZ) |
| 25 | #define GSI_STOP_CMD_TIMEOUT_MS 1 |
| 26 | #define GSI_MAX_CH_LOW_WEIGHT 15 |
| 27 | #define GSI_MHI_ER_START 10 |
| 28 | #define GSI_MHI_ER_END 16 |
| 29 | |
Skylar Chang | 1feb2a3 | 2016-10-17 10:01:36 -0700 | [diff] [blame] | 30 | #define GSI_RESET_WA_MIN_SLEEP 1000 |
| 31 | #define GSI_RESET_WA_MAX_SLEEP 2000 |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 32 | static const struct of_device_id msm_gsi_match[] = { |
| 33 | { .compatible = "qcom,msm_gsi", }, |
| 34 | { }, |
| 35 | }; |
| 36 | |
| 37 | struct gsi_ctx *gsi_ctx; |
| 38 | |
| 39 | static void __gsi_config_type_irq(int ee, uint32_t mask, uint32_t val) |
| 40 | { |
| 41 | uint32_t curr; |
| 42 | |
| 43 | curr = gsi_readl(gsi_ctx->base + |
| 44 | GSI_EE_n_CNTXT_TYPE_IRQ_MSK_OFFS(ee)); |
| 45 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 46 | GSI_EE_n_CNTXT_TYPE_IRQ_MSK_OFFS(ee)); |
| 47 | } |
| 48 | |
| 49 | static void __gsi_config_ch_irq(int ee, uint32_t mask, uint32_t val) |
| 50 | { |
| 51 | uint32_t curr; |
| 52 | |
| 53 | curr = gsi_readl(gsi_ctx->base + |
| 54 | GSI_EE_n_CNTXT_SRC_GSI_CH_IRQ_MSK_OFFS(ee)); |
| 55 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 56 | GSI_EE_n_CNTXT_SRC_GSI_CH_IRQ_MSK_OFFS(ee)); |
| 57 | } |
| 58 | |
| 59 | static void __gsi_config_evt_irq(int ee, uint32_t mask, uint32_t val) |
| 60 | { |
| 61 | uint32_t curr; |
| 62 | |
| 63 | curr = gsi_readl(gsi_ctx->base + |
| 64 | GSI_EE_n_CNTXT_SRC_EV_CH_IRQ_MSK_OFFS(ee)); |
| 65 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 66 | GSI_EE_n_CNTXT_SRC_EV_CH_IRQ_MSK_OFFS(ee)); |
| 67 | } |
| 68 | |
| 69 | static void __gsi_config_ieob_irq(int ee, uint32_t mask, uint32_t val) |
| 70 | { |
| 71 | uint32_t curr; |
| 72 | |
| 73 | curr = gsi_readl(gsi_ctx->base + |
| 74 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_MSK_OFFS(ee)); |
| 75 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 76 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_MSK_OFFS(ee)); |
| 77 | } |
| 78 | |
| 79 | static void __gsi_config_glob_irq(int ee, uint32_t mask, uint32_t val) |
| 80 | { |
| 81 | uint32_t curr; |
| 82 | |
| 83 | curr = gsi_readl(gsi_ctx->base + |
| 84 | GSI_EE_n_CNTXT_GLOB_IRQ_EN_OFFS(ee)); |
| 85 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 86 | GSI_EE_n_CNTXT_GLOB_IRQ_EN_OFFS(ee)); |
| 87 | } |
| 88 | |
| 89 | static void __gsi_config_gen_irq(int ee, uint32_t mask, uint32_t val) |
| 90 | { |
| 91 | uint32_t curr; |
| 92 | |
| 93 | curr = gsi_readl(gsi_ctx->base + |
| 94 | GSI_EE_n_CNTXT_GSI_IRQ_EN_OFFS(ee)); |
| 95 | gsi_writel((curr & ~mask) | (val & mask), gsi_ctx->base + |
| 96 | GSI_EE_n_CNTXT_GSI_IRQ_EN_OFFS(ee)); |
| 97 | } |
| 98 | |
| 99 | static void gsi_handle_ch_ctrl(int ee) |
| 100 | { |
| 101 | uint32_t ch; |
| 102 | int i; |
| 103 | uint32_t val; |
| 104 | struct gsi_chan_ctx *ctx; |
| 105 | |
| 106 | ch = gsi_readl(gsi_ctx->base + |
| 107 | GSI_EE_n_CNTXT_SRC_GSI_CH_IRQ_OFFS(ee)); |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 108 | gsi_writel(ch, gsi_ctx->base + |
| 109 | GSI_EE_n_CNTXT_SRC_GSI_CH_IRQ_CLR_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 110 | GSIDBG("ch %x\n", ch); |
| 111 | for (i = 0; i < 32; i++) { |
| 112 | if ((1 << i) & ch) { |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 113 | if (i >= gsi_ctx->max_ch || i >= GSI_CHAN_MAX) { |
| 114 | GSIERR("invalid channel %d\n", i); |
| 115 | break; |
| 116 | } |
| 117 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 118 | ctx = &gsi_ctx->chan[i]; |
| 119 | val = gsi_readl(gsi_ctx->base + |
| 120 | GSI_EE_n_GSI_CH_k_CNTXT_0_OFFS(i, ee)); |
| 121 | ctx->state = (val & |
| 122 | GSI_EE_n_GSI_CH_k_CNTXT_0_CHSTATE_BMSK) >> |
| 123 | GSI_EE_n_GSI_CH_k_CNTXT_0_CHSTATE_SHFT; |
| 124 | GSIDBG("ch %u state updated to %u\n", i, ctx->state); |
| 125 | complete(&ctx->compl); |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 126 | gsi_ctx->ch_dbg[i].cmd_completed++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 127 | } |
| 128 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | static void gsi_handle_ev_ctrl(int ee) |
| 132 | { |
| 133 | uint32_t ch; |
| 134 | int i; |
| 135 | uint32_t val; |
| 136 | struct gsi_evt_ctx *ctx; |
| 137 | |
| 138 | ch = gsi_readl(gsi_ctx->base + |
| 139 | GSI_EE_n_CNTXT_SRC_EV_CH_IRQ_OFFS(ee)); |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 140 | gsi_writel(ch, gsi_ctx->base + |
| 141 | GSI_EE_n_CNTXT_SRC_EV_CH_IRQ_CLR_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 142 | GSIDBG("ev %x\n", ch); |
| 143 | for (i = 0; i < 32; i++) { |
| 144 | if ((1 << i) & ch) { |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 145 | if (i >= gsi_ctx->max_ev || i >= GSI_EVT_RING_MAX) { |
| 146 | GSIERR("invalid event %d\n", i); |
| 147 | break; |
| 148 | } |
| 149 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 150 | ctx = &gsi_ctx->evtr[i]; |
| 151 | val = gsi_readl(gsi_ctx->base + |
| 152 | GSI_EE_n_EV_CH_k_CNTXT_0_OFFS(i, ee)); |
| 153 | ctx->state = (val & |
| 154 | GSI_EE_n_EV_CH_k_CNTXT_0_CHSTATE_BMSK) >> |
| 155 | GSI_EE_n_EV_CH_k_CNTXT_0_CHSTATE_SHFT; |
| 156 | GSIDBG("evt %u state updated to %u\n", i, ctx->state); |
| 157 | complete(&ctx->compl); |
| 158 | } |
| 159 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | static void gsi_handle_glob_err(uint32_t err) |
| 163 | { |
| 164 | struct gsi_log_err *log; |
| 165 | struct gsi_chan_ctx *ch; |
| 166 | struct gsi_evt_ctx *ev; |
| 167 | struct gsi_chan_err_notify chan_notify; |
| 168 | struct gsi_evt_err_notify evt_notify; |
| 169 | struct gsi_per_notify per_notify; |
| 170 | uint32_t val; |
| 171 | |
| 172 | log = (struct gsi_log_err *)&err; |
| 173 | GSIERR("log err_type=%u ee=%u idx=%u\n", log->err_type, log->ee, |
| 174 | log->virt_idx); |
| 175 | GSIERR("code=%u arg1=%u arg2=%u arg3=%u\n", log->code, log->arg1, |
| 176 | log->arg2, log->arg3); |
| 177 | switch (log->err_type) { |
| 178 | case GSI_ERR_TYPE_GLOB: |
| 179 | per_notify.evt_id = GSI_PER_EVT_GLOB_ERROR; |
| 180 | per_notify.user_data = gsi_ctx->per.user_data; |
| 181 | per_notify.data.err_desc = err & 0xFFFF; |
| 182 | gsi_ctx->per.notify_cb(&per_notify); |
| 183 | break; |
| 184 | case GSI_ERR_TYPE_CHAN: |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 185 | if (log->virt_idx >= gsi_ctx->max_ch) { |
| 186 | GSIERR("Unexpected ch %d\n", log->virt_idx); |
| 187 | WARN_ON(1); |
| 188 | return; |
| 189 | } |
| 190 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 191 | ch = &gsi_ctx->chan[log->virt_idx]; |
| 192 | chan_notify.chan_user_data = ch->props.chan_user_data; |
| 193 | chan_notify.err_desc = err & 0xFFFF; |
| 194 | if (log->code == GSI_INVALID_TRE_ERR) { |
| 195 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 196 | val = gsi_readl(gsi_ctx->base + |
| 197 | GSI_EE_n_GSI_CH_k_CNTXT_0_OFFS(log->virt_idx, |
| 198 | gsi_ctx->per.ee)); |
| 199 | ch->state = (val & |
| 200 | GSI_EE_n_GSI_CH_k_CNTXT_0_CHSTATE_BMSK) >> |
| 201 | GSI_EE_n_GSI_CH_k_CNTXT_0_CHSTATE_SHFT; |
| 202 | GSIDBG("ch %u state updated to %u\n", log->virt_idx, |
| 203 | ch->state); |
| 204 | ch->stats.invalid_tre_error++; |
| 205 | BUG_ON(ch->state != GSI_CHAN_STATE_ERROR); |
| 206 | chan_notify.evt_id = GSI_CHAN_INVALID_TRE_ERR; |
| 207 | } else if (log->code == GSI_OUT_OF_BUFFERS_ERR) { |
| 208 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 209 | chan_notify.evt_id = GSI_CHAN_OUT_OF_BUFFERS_ERR; |
| 210 | } else if (log->code == GSI_OUT_OF_RESOURCES_ERR) { |
| 211 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 212 | chan_notify.evt_id = GSI_CHAN_OUT_OF_RESOURCES_ERR; |
| 213 | complete(&ch->compl); |
| 214 | } else if (log->code == GSI_UNSUPPORTED_INTER_EE_OP_ERR) { |
| 215 | chan_notify.evt_id = |
| 216 | GSI_CHAN_UNSUPPORTED_INTER_EE_OP_ERR; |
| 217 | } else if (log->code == GSI_NON_ALLOCATED_EVT_ACCESS_ERR) { |
| 218 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 219 | chan_notify.evt_id = |
| 220 | GSI_CHAN_NON_ALLOCATED_EVT_ACCESS_ERR; |
| 221 | } else if (log->code == GSI_HWO_1_ERR) { |
| 222 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 223 | chan_notify.evt_id = GSI_CHAN_HWO_1_ERR; |
| 224 | } else { |
| 225 | BUG(); |
| 226 | } |
| 227 | if (ch->props.err_cb) |
| 228 | ch->props.err_cb(&chan_notify); |
| 229 | else |
| 230 | WARN_ON(1); |
| 231 | break; |
| 232 | case GSI_ERR_TYPE_EVT: |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 233 | if (log->virt_idx >= gsi_ctx->max_ev) { |
| 234 | GSIERR("Unexpected ev %d\n", log->virt_idx); |
| 235 | WARN_ON(1); |
| 236 | return; |
| 237 | } |
| 238 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 239 | ev = &gsi_ctx->evtr[log->virt_idx]; |
| 240 | evt_notify.user_data = ev->props.user_data; |
| 241 | evt_notify.err_desc = err & 0xFFFF; |
| 242 | if (log->code == GSI_OUT_OF_BUFFERS_ERR) { |
| 243 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 244 | evt_notify.evt_id = GSI_EVT_OUT_OF_BUFFERS_ERR; |
| 245 | } else if (log->code == GSI_OUT_OF_RESOURCES_ERR) { |
| 246 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 247 | evt_notify.evt_id = GSI_EVT_OUT_OF_RESOURCES_ERR; |
| 248 | complete(&ev->compl); |
| 249 | } else if (log->code == GSI_UNSUPPORTED_INTER_EE_OP_ERR) { |
| 250 | evt_notify.evt_id = GSI_EVT_UNSUPPORTED_INTER_EE_OP_ERR; |
| 251 | } else if (log->code == GSI_EVT_RING_EMPTY_ERR) { |
| 252 | BUG_ON(log->ee != gsi_ctx->per.ee); |
| 253 | evt_notify.evt_id = GSI_EVT_EVT_RING_EMPTY_ERR; |
| 254 | } else { |
| 255 | BUG(); |
| 256 | } |
| 257 | if (ev->props.err_cb) |
| 258 | ev->props.err_cb(&evt_notify); |
| 259 | else |
| 260 | WARN_ON(1); |
| 261 | break; |
| 262 | default: |
| 263 | WARN_ON(1); |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | static void gsi_handle_glob_ee(int ee) |
| 268 | { |
| 269 | uint32_t val; |
| 270 | uint32_t err; |
| 271 | struct gsi_per_notify notify; |
| 272 | uint32_t clr = ~0; |
| 273 | |
| 274 | val = gsi_readl(gsi_ctx->base + |
| 275 | GSI_EE_n_CNTXT_GLOB_IRQ_STTS_OFFS(ee)); |
| 276 | |
| 277 | notify.user_data = gsi_ctx->per.user_data; |
| 278 | |
| 279 | if (val & GSI_EE_n_CNTXT_GLOB_IRQ_STTS_ERROR_INT_BMSK) { |
| 280 | err = gsi_readl(gsi_ctx->base + |
| 281 | GSI_EE_n_ERROR_LOG_OFFS(ee)); |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 282 | if (gsi_ctx->per.ver >= GSI_VER_1_2) |
| 283 | gsi_writel(0, gsi_ctx->base + |
| 284 | GSI_EE_n_ERROR_LOG_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 285 | gsi_writel(clr, gsi_ctx->base + |
| 286 | GSI_EE_n_ERROR_LOG_CLR_OFFS(ee)); |
| 287 | gsi_handle_glob_err(err); |
| 288 | } |
| 289 | |
| 290 | if (val & GSI_EE_n_CNTXT_GLOB_IRQ_EN_GP_INT1_BMSK) { |
| 291 | notify.evt_id = GSI_PER_EVT_GLOB_GP1; |
| 292 | gsi_ctx->per.notify_cb(¬ify); |
| 293 | } |
| 294 | |
| 295 | if (val & GSI_EE_n_CNTXT_GLOB_IRQ_EN_GP_INT2_BMSK) { |
| 296 | notify.evt_id = GSI_PER_EVT_GLOB_GP2; |
| 297 | gsi_ctx->per.notify_cb(¬ify); |
| 298 | } |
| 299 | |
| 300 | if (val & GSI_EE_n_CNTXT_GLOB_IRQ_EN_GP_INT3_BMSK) { |
| 301 | notify.evt_id = GSI_PER_EVT_GLOB_GP3; |
| 302 | gsi_ctx->per.notify_cb(¬ify); |
| 303 | } |
| 304 | |
| 305 | gsi_writel(val, gsi_ctx->base + |
| 306 | GSI_EE_n_CNTXT_GLOB_IRQ_CLR_OFFS(ee)); |
| 307 | } |
| 308 | |
| 309 | static void gsi_incr_ring_wp(struct gsi_ring_ctx *ctx) |
| 310 | { |
| 311 | ctx->wp_local += ctx->elem_sz; |
| 312 | if (ctx->wp_local == ctx->end) |
| 313 | ctx->wp_local = ctx->base; |
| 314 | } |
| 315 | |
| 316 | static void gsi_incr_ring_rp(struct gsi_ring_ctx *ctx) |
| 317 | { |
| 318 | ctx->rp_local += ctx->elem_sz; |
| 319 | if (ctx->rp_local == ctx->end) |
| 320 | ctx->rp_local = ctx->base; |
| 321 | } |
| 322 | |
| 323 | uint16_t gsi_find_idx_from_addr(struct gsi_ring_ctx *ctx, uint64_t addr) |
| 324 | { |
| 325 | BUG_ON(addr < ctx->base || addr >= ctx->end); |
| 326 | |
| 327 | return (uint32_t)(addr - ctx->base)/ctx->elem_sz; |
| 328 | } |
| 329 | |
| 330 | static void gsi_process_chan(struct gsi_xfer_compl_evt *evt, |
| 331 | struct gsi_chan_xfer_notify *notify, bool callback) |
| 332 | { |
| 333 | uint32_t ch_id; |
| 334 | struct gsi_chan_ctx *ch_ctx; |
| 335 | uint16_t rp_idx; |
| 336 | uint64_t rp; |
| 337 | |
| 338 | ch_id = evt->chid; |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 339 | if (ch_id >= gsi_ctx->max_ch) { |
| 340 | GSIERR("Unexpected ch %d\n", ch_id); |
| 341 | WARN_ON(1); |
| 342 | return; |
| 343 | } |
| 344 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 345 | ch_ctx = &gsi_ctx->chan[ch_id]; |
| 346 | BUG_ON(ch_ctx->props.prot != GSI_CHAN_PROT_GPI); |
| 347 | rp = evt->xfer_ptr; |
| 348 | |
| 349 | while (ch_ctx->ring.rp_local != rp) { |
| 350 | gsi_incr_ring_rp(&ch_ctx->ring); |
| 351 | ch_ctx->stats.completed++; |
| 352 | } |
| 353 | |
| 354 | /* the element at RP is also processed */ |
| 355 | gsi_incr_ring_rp(&ch_ctx->ring); |
| 356 | ch_ctx->stats.completed++; |
| 357 | |
| 358 | ch_ctx->ring.rp = ch_ctx->ring.rp_local; |
| 359 | |
| 360 | rp_idx = gsi_find_idx_from_addr(&ch_ctx->ring, rp); |
| 361 | notify->xfer_user_data = ch_ctx->user_data[rp_idx]; |
| 362 | notify->chan_user_data = ch_ctx->props.chan_user_data; |
| 363 | notify->evt_id = evt->code; |
| 364 | notify->bytes_xfered = evt->len; |
| 365 | if (callback) |
| 366 | ch_ctx->props.xfer_cb(notify); |
| 367 | } |
| 368 | |
| 369 | static void gsi_process_evt_re(struct gsi_evt_ctx *ctx, |
| 370 | struct gsi_chan_xfer_notify *notify, bool callback) |
| 371 | { |
| 372 | struct gsi_xfer_compl_evt *evt; |
| 373 | uint16_t idx; |
| 374 | |
| 375 | idx = gsi_find_idx_from_addr(&ctx->ring, ctx->ring.rp_local); |
| 376 | evt = (struct gsi_xfer_compl_evt *)(ctx->ring.base_va + |
| 377 | idx * ctx->ring.elem_sz); |
| 378 | gsi_process_chan(evt, notify, callback); |
| 379 | gsi_incr_ring_rp(&ctx->ring); |
| 380 | /* recycle this element */ |
| 381 | gsi_incr_ring_wp(&ctx->ring); |
| 382 | ctx->stats.completed++; |
| 383 | } |
| 384 | |
| 385 | static void gsi_ring_evt_doorbell(struct gsi_evt_ctx *ctx) |
| 386 | { |
| 387 | uint32_t val; |
| 388 | |
| 389 | /* write order MUST be MSB followed by LSB */ |
| 390 | val = ((ctx->ring.wp_local >> 32) & |
| 391 | GSI_EE_n_EV_CH_k_DOORBELL_1_WRITE_PTR_MSB_BMSK) << |
| 392 | GSI_EE_n_EV_CH_k_DOORBELL_1_WRITE_PTR_MSB_SHFT; |
| 393 | gsi_writel(val, gsi_ctx->base + |
| 394 | GSI_EE_n_EV_CH_k_DOORBELL_1_OFFS(ctx->id, |
| 395 | gsi_ctx->per.ee)); |
| 396 | |
| 397 | val = (ctx->ring.wp_local & |
| 398 | GSI_EE_n_EV_CH_k_DOORBELL_0_WRITE_PTR_LSB_BMSK) << |
| 399 | GSI_EE_n_EV_CH_k_DOORBELL_0_WRITE_PTR_LSB_SHFT; |
| 400 | gsi_writel(val, gsi_ctx->base + |
| 401 | GSI_EE_n_EV_CH_k_DOORBELL_0_OFFS(ctx->id, |
| 402 | gsi_ctx->per.ee)); |
| 403 | } |
| 404 | |
| 405 | static void gsi_ring_chan_doorbell(struct gsi_chan_ctx *ctx) |
| 406 | { |
| 407 | uint32_t val; |
| 408 | |
| 409 | /* write order MUST be MSB followed by LSB */ |
| 410 | val = ((ctx->ring.wp_local >> 32) & |
| 411 | GSI_EE_n_GSI_CH_k_DOORBELL_1_WRITE_PTR_MSB_BMSK) << |
| 412 | GSI_EE_n_GSI_CH_k_DOORBELL_1_WRITE_PTR_MSB_SHFT; |
| 413 | gsi_writel(val, gsi_ctx->base + |
| 414 | GSI_EE_n_GSI_CH_k_DOORBELL_1_OFFS(ctx->props.ch_id, |
| 415 | gsi_ctx->per.ee)); |
| 416 | |
| 417 | val = (ctx->ring.wp_local & |
| 418 | GSI_EE_n_GSI_CH_k_DOORBELL_0_WRITE_PTR_LSB_BMSK) << |
| 419 | GSI_EE_n_GSI_CH_k_DOORBELL_0_WRITE_PTR_LSB_SHFT; |
| 420 | gsi_writel(val, gsi_ctx->base + |
| 421 | GSI_EE_n_GSI_CH_k_DOORBELL_0_OFFS(ctx->props.ch_id, |
| 422 | gsi_ctx->per.ee)); |
| 423 | } |
| 424 | |
| 425 | static void gsi_handle_ieob(int ee) |
| 426 | { |
| 427 | uint32_t ch; |
| 428 | int i; |
| 429 | uint64_t rp; |
| 430 | struct gsi_evt_ctx *ctx; |
| 431 | struct gsi_chan_xfer_notify notify; |
| 432 | unsigned long flags; |
| 433 | unsigned long cntr; |
| 434 | uint32_t msk; |
| 435 | |
| 436 | ch = gsi_readl(gsi_ctx->base + |
| 437 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_OFFS(ee)); |
| 438 | msk = gsi_readl(gsi_ctx->base + |
| 439 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_MSK_OFFS(ee)); |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 440 | gsi_writel(ch & msk, gsi_ctx->base + |
| 441 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_CLR_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 442 | |
| 443 | for (i = 0; i < 32; i++) { |
| 444 | if ((1 << i) & ch & msk) { |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 445 | if (i >= gsi_ctx->max_ev || i >= GSI_EVT_RING_MAX) { |
| 446 | GSIERR("invalid event %d\n", i); |
| 447 | break; |
| 448 | } |
| 449 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 450 | ctx = &gsi_ctx->evtr[i]; |
| 451 | BUG_ON(ctx->props.intf != GSI_EVT_CHTYPE_GPI_EV); |
| 452 | spin_lock_irqsave(&ctx->ring.slock, flags); |
| 453 | check_again: |
| 454 | cntr = 0; |
| 455 | rp = gsi_readl(gsi_ctx->base + |
| 456 | GSI_EE_n_EV_CH_k_CNTXT_4_OFFS(i, ee)); |
| 457 | rp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 458 | GSI_EE_n_EV_CH_k_CNTXT_5_OFFS(i, ee))) << 32; |
| 459 | ctx->ring.rp = rp; |
| 460 | while (ctx->ring.rp_local != rp) { |
| 461 | ++cntr; |
| 462 | gsi_process_evt_re(ctx, ¬ify, true); |
| 463 | if (ctx->props.exclusive && |
| 464 | atomic_read(&ctx->chan->poll_mode)) { |
| 465 | cntr = 0; |
| 466 | break; |
| 467 | } |
| 468 | } |
| 469 | gsi_ring_evt_doorbell(ctx); |
| 470 | if (cntr != 0) |
| 471 | goto check_again; |
| 472 | spin_unlock_irqrestore(&ctx->ring.slock, flags); |
| 473 | } |
| 474 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | static void gsi_handle_inter_ee_ch_ctrl(int ee) |
| 478 | { |
| 479 | uint32_t ch; |
| 480 | int i; |
| 481 | |
| 482 | ch = gsi_readl(gsi_ctx->base + |
| 483 | GSI_INTER_EE_n_SRC_GSI_CH_IRQ_OFFS(ee)); |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 484 | gsi_writel(ch, gsi_ctx->base + |
| 485 | GSI_INTER_EE_n_SRC_GSI_CH_IRQ_CLR_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 486 | for (i = 0; i < 32; i++) { |
| 487 | if ((1 << i) & ch) { |
| 488 | /* not currently expected */ |
| 489 | GSIERR("ch %u was inter-EE changed\n", i); |
| 490 | } |
| 491 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | static void gsi_handle_inter_ee_ev_ctrl(int ee) |
| 495 | { |
| 496 | uint32_t ch; |
| 497 | int i; |
| 498 | |
| 499 | ch = gsi_readl(gsi_ctx->base + |
| 500 | GSI_INTER_EE_n_SRC_EV_CH_IRQ_OFFS(ee)); |
Skylar Chang | cfd46c1 | 2016-11-18 10:56:51 -0800 | [diff] [blame^] | 501 | gsi_writel(ch, gsi_ctx->base + |
| 502 | GSI_INTER_EE_n_SRC_EV_CH_IRQ_CLR_OFFS(ee)); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 503 | for (i = 0; i < 32; i++) { |
| 504 | if ((1 << i) & ch) { |
| 505 | /* not currently expected */ |
| 506 | GSIERR("evt %u was inter-EE changed\n", i); |
| 507 | } |
| 508 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | static void gsi_handle_general(int ee) |
| 512 | { |
| 513 | uint32_t val; |
| 514 | struct gsi_per_notify notify; |
| 515 | |
| 516 | val = gsi_readl(gsi_ctx->base + |
| 517 | GSI_EE_n_CNTXT_GSI_IRQ_STTS_OFFS(ee)); |
| 518 | |
| 519 | notify.user_data = gsi_ctx->per.user_data; |
| 520 | |
| 521 | if (val & GSI_EE_n_CNTXT_GSI_IRQ_CLR_GSI_MCS_STACK_OVRFLOW_BMSK) |
| 522 | notify.evt_id = GSI_PER_EVT_GENERAL_MCS_STACK_OVERFLOW; |
| 523 | |
| 524 | if (val & GSI_EE_n_CNTXT_GSI_IRQ_CLR_GSI_CMD_FIFO_OVRFLOW_BMSK) |
| 525 | notify.evt_id = GSI_PER_EVT_GENERAL_CMD_FIFO_OVERFLOW; |
| 526 | |
| 527 | if (val & GSI_EE_n_CNTXT_GSI_IRQ_CLR_GSI_BUS_ERROR_BMSK) |
| 528 | notify.evt_id = GSI_PER_EVT_GENERAL_BUS_ERROR; |
| 529 | |
| 530 | if (val & GSI_EE_n_CNTXT_GSI_IRQ_CLR_GSI_BREAK_POINT_BMSK) |
| 531 | notify.evt_id = GSI_PER_EVT_GENERAL_BREAK_POINT; |
| 532 | |
| 533 | if (gsi_ctx->per.notify_cb) |
| 534 | gsi_ctx->per.notify_cb(¬ify); |
| 535 | |
| 536 | gsi_writel(val, gsi_ctx->base + |
| 537 | GSI_EE_n_CNTXT_GSI_IRQ_CLR_OFFS(ee)); |
| 538 | } |
| 539 | |
| 540 | #define GSI_ISR_MAX_ITER 50 |
| 541 | |
| 542 | static void gsi_handle_irq(void) |
| 543 | { |
| 544 | uint32_t type; |
| 545 | int ee = gsi_ctx->per.ee; |
| 546 | unsigned long cnt = 0; |
| 547 | |
| 548 | while (1) { |
| 549 | type = gsi_readl(gsi_ctx->base + |
| 550 | GSI_EE_n_CNTXT_TYPE_IRQ_OFFS(ee)); |
| 551 | |
| 552 | if (!type) |
| 553 | break; |
| 554 | |
| 555 | GSIDBG("type %x\n", type); |
| 556 | |
| 557 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_CH_CTRL_BMSK) |
| 558 | gsi_handle_ch_ctrl(ee); |
| 559 | |
| 560 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_EV_CTRL_BMSK) |
| 561 | gsi_handle_ev_ctrl(ee); |
| 562 | |
| 563 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_GLOB_EE_BMSK) |
| 564 | gsi_handle_glob_ee(ee); |
| 565 | |
| 566 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_IEOB_BMSK) |
| 567 | gsi_handle_ieob(ee); |
| 568 | |
| 569 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_INTER_EE_CH_CTRL_BMSK) |
| 570 | gsi_handle_inter_ee_ch_ctrl(ee); |
| 571 | |
| 572 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_INTER_EE_EV_CTRL_BMSK) |
| 573 | gsi_handle_inter_ee_ev_ctrl(ee); |
| 574 | |
| 575 | if (type & GSI_EE_n_CNTXT_TYPE_IRQ_GENERAL_BMSK) |
| 576 | gsi_handle_general(ee); |
| 577 | |
| 578 | if (++cnt > GSI_ISR_MAX_ITER) |
| 579 | BUG(); |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | static irqreturn_t gsi_isr(int irq, void *ctxt) |
| 584 | { |
| 585 | BUG_ON(ctxt != gsi_ctx); |
| 586 | |
| 587 | if (gsi_ctx->per.req_clk_cb) { |
| 588 | bool granted = false; |
| 589 | |
| 590 | gsi_ctx->per.req_clk_cb(gsi_ctx->per.user_data, &granted); |
| 591 | if (granted) { |
| 592 | gsi_handle_irq(); |
| 593 | gsi_ctx->per.rel_clk_cb(gsi_ctx->per.user_data); |
| 594 | } |
| 595 | } else { |
| 596 | gsi_handle_irq(); |
| 597 | } |
| 598 | |
| 599 | return IRQ_HANDLED; |
| 600 | } |
| 601 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 602 | static uint32_t gsi_get_max_channels(enum gsi_ver ver) |
| 603 | { |
| 604 | uint32_t reg; |
| 605 | |
| 606 | switch (ver) { |
| 607 | case GSI_VER_1_0: |
| 608 | reg = gsi_readl(gsi_ctx->base + |
| 609 | GSI_V1_0_EE_n_GSI_HW_PARAM_OFFS(gsi_ctx->per.ee)); |
| 610 | reg = (reg & GSI_V1_0_EE_n_GSI_HW_PARAM_GSI_CH_NUM_BMSK) >> |
| 611 | GSI_V1_0_EE_n_GSI_HW_PARAM_GSI_CH_NUM_SHFT; |
| 612 | break; |
| 613 | case GSI_VER_1_2: |
| 614 | reg = gsi_readl(gsi_ctx->base + |
| 615 | GSI_V1_2_EE_n_GSI_HW_PARAM_0_OFFS(gsi_ctx->per.ee)); |
| 616 | reg = (reg & GSI_V1_2_EE_n_GSI_HW_PARAM_0_GSI_CH_NUM_BMSK) >> |
| 617 | GSI_V1_2_EE_n_GSI_HW_PARAM_0_GSI_CH_NUM_SHFT; |
| 618 | break; |
| 619 | case GSI_VER_1_3: |
| 620 | reg = gsi_readl(gsi_ctx->base + |
| 621 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_OFFS(gsi_ctx->per.ee)); |
| 622 | reg = (reg & |
| 623 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_GSI_NUM_CH_PER_EE_BMSK) >> |
| 624 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_GSI_NUM_CH_PER_EE_SHFT; |
| 625 | break; |
| 626 | default: |
| 627 | GSIERR("bad gsi version %d\n", ver); |
| 628 | WARN_ON(1); |
| 629 | reg = 0; |
| 630 | } |
| 631 | |
| 632 | GSIDBG("max channels %d\n", reg); |
| 633 | |
| 634 | return reg; |
| 635 | } |
| 636 | |
| 637 | static uint32_t gsi_get_max_event_rings(enum gsi_ver ver) |
| 638 | { |
| 639 | uint32_t reg; |
| 640 | |
| 641 | switch (ver) { |
| 642 | case GSI_VER_1_0: |
| 643 | reg = gsi_readl(gsi_ctx->base + |
| 644 | GSI_V1_0_EE_n_GSI_HW_PARAM_OFFS(gsi_ctx->per.ee)); |
| 645 | reg = (reg & GSI_V1_0_EE_n_GSI_HW_PARAM_GSI_EV_CH_NUM_BMSK) >> |
| 646 | GSI_V1_0_EE_n_GSI_HW_PARAM_GSI_EV_CH_NUM_SHFT; |
| 647 | break; |
| 648 | case GSI_VER_1_2: |
| 649 | reg = gsi_readl(gsi_ctx->base + |
| 650 | GSI_V1_2_EE_n_GSI_HW_PARAM_0_OFFS(gsi_ctx->per.ee)); |
| 651 | reg = (reg & GSI_V1_2_EE_n_GSI_HW_PARAM_0_GSI_EV_CH_NUM_BMSK) >> |
| 652 | GSI_V1_2_EE_n_GSI_HW_PARAM_0_GSI_EV_CH_NUM_SHFT; |
| 653 | break; |
| 654 | case GSI_VER_1_3: |
| 655 | reg = gsi_readl(gsi_ctx->base + |
| 656 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_OFFS(gsi_ctx->per.ee)); |
| 657 | reg = (reg & |
| 658 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_GSI_NUM_EV_PER_EE_BMSK) >> |
| 659 | GSI_V1_3_EE_n_GSI_HW_PARAM_2_GSI_NUM_EV_PER_EE_SHFT; |
| 660 | break; |
| 661 | default: |
| 662 | GSIERR("bad gsi version %d\n", ver); |
| 663 | WARN_ON(1); |
| 664 | reg = 0; |
| 665 | } |
| 666 | |
| 667 | GSIDBG("max event rings %d\n", reg); |
| 668 | |
| 669 | return reg; |
| 670 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 671 | int gsi_complete_clk_grant(unsigned long dev_hdl) |
| 672 | { |
| 673 | unsigned long flags; |
| 674 | |
| 675 | if (!gsi_ctx) { |
| 676 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 677 | return -GSI_STATUS_NODEV; |
| 678 | } |
| 679 | |
| 680 | if (!gsi_ctx->per_registered) { |
| 681 | GSIERR("no client registered\n"); |
| 682 | return -GSI_STATUS_INVALID_PARAMS; |
| 683 | } |
| 684 | |
| 685 | if (dev_hdl != (uintptr_t)gsi_ctx) { |
| 686 | GSIERR("bad params dev_hdl=0x%lx gsi_ctx=0x%p\n", dev_hdl, |
| 687 | gsi_ctx); |
| 688 | return -GSI_STATUS_INVALID_PARAMS; |
| 689 | } |
| 690 | |
| 691 | spin_lock_irqsave(&gsi_ctx->slock, flags); |
| 692 | gsi_handle_irq(); |
| 693 | gsi_ctx->per.rel_clk_cb(gsi_ctx->per.user_data); |
| 694 | spin_unlock_irqrestore(&gsi_ctx->slock, flags); |
| 695 | |
| 696 | return GSI_STATUS_SUCCESS; |
| 697 | } |
| 698 | EXPORT_SYMBOL(gsi_complete_clk_grant); |
| 699 | |
| 700 | int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) |
| 701 | { |
| 702 | int res; |
| 703 | uint32_t val; |
| 704 | |
| 705 | if (!gsi_ctx) { |
| 706 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 707 | return -GSI_STATUS_NODEV; |
| 708 | } |
| 709 | |
| 710 | if (!props || !dev_hdl) { |
| 711 | GSIERR("bad params props=%p dev_hdl=%p\n", props, dev_hdl); |
| 712 | return -GSI_STATUS_INVALID_PARAMS; |
| 713 | } |
| 714 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 715 | if (props->ver <= GSI_VER_ERR || props->ver >= GSI_VER_MAX) { |
| 716 | GSIERR("bad params gsi_ver=%d\n", props->ver); |
| 717 | return -GSI_STATUS_INVALID_PARAMS; |
| 718 | } |
| 719 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 720 | if (!props->notify_cb) { |
| 721 | GSIERR("notify callback must be provided\n"); |
| 722 | return -GSI_STATUS_INVALID_PARAMS; |
| 723 | } |
| 724 | |
| 725 | if (props->req_clk_cb && !props->rel_clk_cb) { |
| 726 | GSIERR("rel callback must be provided\n"); |
| 727 | return -GSI_STATUS_INVALID_PARAMS; |
| 728 | } |
| 729 | |
| 730 | if (gsi_ctx->per_registered) { |
| 731 | GSIERR("per already registered\n"); |
| 732 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 733 | } |
| 734 | |
| 735 | spin_lock_init(&gsi_ctx->slock); |
| 736 | if (props->intr == GSI_INTR_IRQ) { |
| 737 | if (!props->irq) { |
| 738 | GSIERR("bad irq specified %u\n", props->irq); |
| 739 | return -GSI_STATUS_INVALID_PARAMS; |
| 740 | } |
| 741 | |
| 742 | res = devm_request_irq(gsi_ctx->dev, props->irq, |
| 743 | (irq_handler_t) gsi_isr, |
| 744 | props->req_clk_cb ? IRQF_TRIGGER_RISING : |
| 745 | IRQF_TRIGGER_HIGH, |
| 746 | "gsi", |
| 747 | gsi_ctx); |
| 748 | if (res) { |
| 749 | GSIERR("failed to register isr for %u\n", props->irq); |
| 750 | return -GSI_STATUS_ERROR; |
| 751 | } |
| 752 | |
| 753 | res = enable_irq_wake(props->irq); |
| 754 | if (res) |
| 755 | GSIERR("failed to enable wake irq %u\n", props->irq); |
| 756 | else |
| 757 | GSIERR("GSI irq is wake enabled %u\n", props->irq); |
| 758 | |
| 759 | } else { |
| 760 | GSIERR("do not support interrupt type %u\n", props->intr); |
| 761 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 762 | } |
| 763 | |
| 764 | gsi_ctx->base = devm_ioremap_nocache(gsi_ctx->dev, props->phys_addr, |
| 765 | props->size); |
| 766 | if (!gsi_ctx->base) { |
| 767 | GSIERR("failed to remap GSI HW\n"); |
| 768 | devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); |
| 769 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 770 | } |
| 771 | |
| 772 | gsi_ctx->per = *props; |
| 773 | gsi_ctx->per_registered = true; |
| 774 | mutex_init(&gsi_ctx->mlock); |
| 775 | atomic_set(&gsi_ctx->num_chan, 0); |
| 776 | atomic_set(&gsi_ctx->num_evt_ring, 0); |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 777 | gsi_ctx->max_ch = gsi_get_max_channels(gsi_ctx->per.ver); |
| 778 | if (gsi_ctx->max_ch == 0) { |
| 779 | devm_iounmap(gsi_ctx->dev, gsi_ctx->base); |
| 780 | devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); |
| 781 | GSIERR("failed to get max channels\n"); |
| 782 | return -GSI_STATUS_ERROR; |
| 783 | } |
| 784 | gsi_ctx->max_ev = gsi_get_max_event_rings(gsi_ctx->per.ver); |
| 785 | if (gsi_ctx->max_ev == 0) { |
| 786 | devm_iounmap(gsi_ctx->dev, gsi_ctx->base); |
| 787 | devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); |
| 788 | GSIERR("failed to get max event rings\n"); |
| 789 | return -GSI_STATUS_ERROR; |
| 790 | } |
| 791 | |
| 792 | /* bitmap is max events excludes reserved events */ |
| 793 | gsi_ctx->evt_bmap = ~((1 << gsi_ctx->max_ev) - 1); |
| 794 | gsi_ctx->evt_bmap |= ((1 << (GSI_MHI_ER_END + 1)) - 1) ^ |
| 795 | ((1 << GSI_MHI_ER_START) - 1); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 796 | |
| 797 | /* |
| 798 | * enable all interrupts but GSI_BREAK_POINT. |
| 799 | * Inter EE commands / interrupt are no supported. |
| 800 | */ |
| 801 | __gsi_config_type_irq(props->ee, ~0, ~0); |
| 802 | __gsi_config_ch_irq(props->ee, ~0, ~0); |
| 803 | __gsi_config_evt_irq(props->ee, ~0, ~0); |
| 804 | __gsi_config_ieob_irq(props->ee, ~0, ~0); |
| 805 | __gsi_config_glob_irq(props->ee, ~0, ~0); |
| 806 | __gsi_config_gen_irq(props->ee, ~0, |
| 807 | ~GSI_EE_n_CNTXT_GSI_IRQ_CLR_GSI_BREAK_POINT_BMSK); |
| 808 | |
| 809 | gsi_writel(props->intr, gsi_ctx->base + |
| 810 | GSI_EE_n_CNTXT_INTSET_OFFS(gsi_ctx->per.ee)); |
| 811 | |
| 812 | val = gsi_readl(gsi_ctx->base + |
| 813 | GSI_EE_n_GSI_STATUS_OFFS(gsi_ctx->per.ee)); |
| 814 | if (val & GSI_EE_n_GSI_STATUS_ENABLED_BMSK) |
| 815 | gsi_ctx->enabled = true; |
| 816 | else |
| 817 | GSIERR("Manager EE has not enabled GSI, GSI un-usable\n"); |
| 818 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 819 | if (gsi_ctx->per.ver >= GSI_VER_1_2) |
| 820 | gsi_writel(0, gsi_ctx->base + |
| 821 | GSI_EE_n_ERROR_LOG_OFFS(gsi_ctx->per.ee)); |
| 822 | |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 823 | *dev_hdl = (uintptr_t)gsi_ctx; |
| 824 | |
| 825 | return GSI_STATUS_SUCCESS; |
| 826 | } |
| 827 | EXPORT_SYMBOL(gsi_register_device); |
| 828 | |
| 829 | int gsi_write_device_scratch(unsigned long dev_hdl, |
| 830 | struct gsi_device_scratch *val) |
| 831 | { |
| 832 | if (!gsi_ctx) { |
| 833 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 834 | return -GSI_STATUS_NODEV; |
| 835 | } |
| 836 | |
| 837 | if (!gsi_ctx->per_registered) { |
| 838 | GSIERR("no client registered\n"); |
| 839 | return -GSI_STATUS_INVALID_PARAMS; |
| 840 | } |
| 841 | |
| 842 | if (dev_hdl != (uintptr_t)gsi_ctx) { |
| 843 | GSIERR("bad params dev_hdl=0x%lx gsi_ctx=0x%p\n", dev_hdl, |
| 844 | gsi_ctx); |
| 845 | return -GSI_STATUS_INVALID_PARAMS; |
| 846 | } |
| 847 | |
| 848 | if (val->max_usb_pkt_size_valid && |
| 849 | val->max_usb_pkt_size != 1024 && |
| 850 | val->max_usb_pkt_size != 512) { |
| 851 | GSIERR("bad USB max pkt size dev_hdl=0x%lx sz=%u\n", dev_hdl, |
| 852 | val->max_usb_pkt_size); |
| 853 | return -GSI_STATUS_INVALID_PARAMS; |
| 854 | } |
| 855 | |
| 856 | mutex_lock(&gsi_ctx->mlock); |
| 857 | if (val->mhi_base_chan_idx_valid) |
| 858 | gsi_ctx->scratch.word0.s.mhi_base_chan_idx = |
| 859 | val->mhi_base_chan_idx; |
| 860 | if (val->max_usb_pkt_size_valid) |
| 861 | gsi_ctx->scratch.word0.s.max_usb_pkt_size = |
| 862 | (val->max_usb_pkt_size == 1024) ? 1 : 0; |
| 863 | gsi_writel(gsi_ctx->scratch.word0.val, |
| 864 | gsi_ctx->base + |
| 865 | GSI_EE_n_CNTXT_SCRATCH_0_OFFS(gsi_ctx->per.ee)); |
| 866 | mutex_unlock(&gsi_ctx->mlock); |
| 867 | |
| 868 | return GSI_STATUS_SUCCESS; |
| 869 | } |
| 870 | EXPORT_SYMBOL(gsi_write_device_scratch); |
| 871 | |
| 872 | int gsi_deregister_device(unsigned long dev_hdl, bool force) |
| 873 | { |
| 874 | if (!gsi_ctx) { |
| 875 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 876 | return -GSI_STATUS_NODEV; |
| 877 | } |
| 878 | |
| 879 | if (!gsi_ctx->per_registered) { |
| 880 | GSIERR("no client registered\n"); |
| 881 | return -GSI_STATUS_INVALID_PARAMS; |
| 882 | } |
| 883 | |
| 884 | if (dev_hdl != (uintptr_t)gsi_ctx) { |
| 885 | GSIERR("bad params dev_hdl=0x%lx gsi_ctx=0x%p\n", dev_hdl, |
| 886 | gsi_ctx); |
| 887 | return -GSI_STATUS_INVALID_PARAMS; |
| 888 | } |
| 889 | |
| 890 | if (!force && atomic_read(&gsi_ctx->num_chan)) { |
| 891 | GSIERR("%u channels are allocated\n", |
| 892 | atomic_read(&gsi_ctx->num_chan)); |
| 893 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 894 | } |
| 895 | |
| 896 | if (!force && atomic_read(&gsi_ctx->num_evt_ring)) { |
| 897 | GSIERR("%u evt rings are allocated\n", |
| 898 | atomic_read(&gsi_ctx->num_evt_ring)); |
| 899 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 900 | } |
| 901 | |
| 902 | /* disable all interrupts */ |
| 903 | __gsi_config_type_irq(gsi_ctx->per.ee, ~0, 0); |
| 904 | __gsi_config_ch_irq(gsi_ctx->per.ee, ~0, 0); |
| 905 | __gsi_config_evt_irq(gsi_ctx->per.ee, ~0, 0); |
| 906 | __gsi_config_ieob_irq(gsi_ctx->per.ee, ~0, 0); |
| 907 | __gsi_config_glob_irq(gsi_ctx->per.ee, ~0, 0); |
| 908 | __gsi_config_gen_irq(gsi_ctx->per.ee, ~0, 0); |
| 909 | |
| 910 | devm_free_irq(gsi_ctx->dev, gsi_ctx->per.irq, gsi_ctx); |
| 911 | devm_iounmap(gsi_ctx->dev, gsi_ctx->base); |
| 912 | memset(gsi_ctx, 0, sizeof(*gsi_ctx)); |
| 913 | |
| 914 | return GSI_STATUS_SUCCESS; |
| 915 | } |
| 916 | EXPORT_SYMBOL(gsi_deregister_device); |
| 917 | |
| 918 | static void gsi_program_evt_ring_ctx(struct gsi_evt_ring_props *props, |
| 919 | uint8_t evt_id, unsigned int ee) |
| 920 | { |
| 921 | uint32_t val; |
| 922 | |
| 923 | GSIDBG("intf=%u intr=%u re=%u\n", props->intf, props->intr, |
| 924 | props->re_size); |
| 925 | |
| 926 | val = (((props->intf << GSI_EE_n_EV_CH_k_CNTXT_0_CHTYPE_SHFT) & |
| 927 | GSI_EE_n_EV_CH_k_CNTXT_0_CHTYPE_BMSK) | |
| 928 | ((props->intr << GSI_EE_n_EV_CH_k_CNTXT_0_INTYPE_SHFT) & |
| 929 | GSI_EE_n_EV_CH_k_CNTXT_0_INTYPE_BMSK) | |
| 930 | ((props->re_size << GSI_EE_n_EV_CH_k_CNTXT_0_ELEMENT_SIZE_SHFT) |
| 931 | & GSI_EE_n_EV_CH_k_CNTXT_0_ELEMENT_SIZE_BMSK)); |
| 932 | |
| 933 | gsi_writel(val, gsi_ctx->base + |
| 934 | GSI_EE_n_EV_CH_k_CNTXT_0_OFFS(evt_id, ee)); |
| 935 | |
| 936 | val = (props->ring_len & GSI_EE_n_EV_CH_k_CNTXT_1_R_LENGTH_BMSK) << |
| 937 | GSI_EE_n_EV_CH_k_CNTXT_1_R_LENGTH_SHFT; |
| 938 | gsi_writel(val, gsi_ctx->base + |
| 939 | GSI_EE_n_EV_CH_k_CNTXT_1_OFFS(evt_id, ee)); |
| 940 | |
| 941 | val = (props->ring_base_addr & |
| 942 | GSI_EE_n_EV_CH_k_CNTXT_2_R_BASE_ADDR_LSBS_BMSK) << |
| 943 | GSI_EE_n_EV_CH_k_CNTXT_2_R_BASE_ADDR_LSBS_SHFT; |
| 944 | gsi_writel(val, gsi_ctx->base + |
| 945 | GSI_EE_n_EV_CH_k_CNTXT_2_OFFS(evt_id, ee)); |
| 946 | |
| 947 | val = ((props->ring_base_addr >> 32) & |
| 948 | GSI_EE_n_EV_CH_k_CNTXT_3_R_BASE_ADDR_MSBS_BMSK) << |
| 949 | GSI_EE_n_EV_CH_k_CNTXT_3_R_BASE_ADDR_MSBS_SHFT; |
| 950 | gsi_writel(val, gsi_ctx->base + |
| 951 | GSI_EE_n_EV_CH_k_CNTXT_3_OFFS(evt_id, ee)); |
| 952 | |
| 953 | val = (((props->int_modt << GSI_EE_n_EV_CH_k_CNTXT_8_INT_MODT_SHFT) & |
| 954 | GSI_EE_n_EV_CH_k_CNTXT_8_INT_MODT_BMSK) | |
| 955 | ((props->int_modc << GSI_EE_n_EV_CH_k_CNTXT_8_INT_MODC_SHFT) & |
| 956 | GSI_EE_n_EV_CH_k_CNTXT_8_INT_MODC_BMSK)); |
| 957 | gsi_writel(val, gsi_ctx->base + |
| 958 | GSI_EE_n_EV_CH_k_CNTXT_8_OFFS(evt_id, ee)); |
| 959 | |
| 960 | val = (props->intvec & GSI_EE_n_EV_CH_k_CNTXT_9_INTVEC_BMSK) << |
| 961 | GSI_EE_n_EV_CH_k_CNTXT_9_INTVEC_SHFT; |
| 962 | gsi_writel(val, gsi_ctx->base + |
| 963 | GSI_EE_n_EV_CH_k_CNTXT_9_OFFS(evt_id, ee)); |
| 964 | |
| 965 | val = (props->msi_addr & GSI_EE_n_EV_CH_k_CNTXT_10_MSI_ADDR_LSB_BMSK) << |
| 966 | GSI_EE_n_EV_CH_k_CNTXT_10_MSI_ADDR_LSB_SHFT; |
| 967 | gsi_writel(val, gsi_ctx->base + |
| 968 | GSI_EE_n_EV_CH_k_CNTXT_10_OFFS(evt_id, ee)); |
| 969 | |
| 970 | val = ((props->msi_addr >> 32) & |
| 971 | GSI_EE_n_EV_CH_k_CNTXT_11_MSI_ADDR_MSB_BMSK) << |
| 972 | GSI_EE_n_EV_CH_k_CNTXT_11_MSI_ADDR_MSB_SHFT; |
| 973 | gsi_writel(val, gsi_ctx->base + |
| 974 | GSI_EE_n_EV_CH_k_CNTXT_11_OFFS(evt_id, ee)); |
| 975 | |
| 976 | val = (props->rp_update_addr & |
| 977 | GSI_EE_n_EV_CH_k_CNTXT_12_RP_UPDATE_ADDR_LSB_BMSK) << |
| 978 | GSI_EE_n_EV_CH_k_CNTXT_12_RP_UPDATE_ADDR_LSB_SHFT; |
| 979 | gsi_writel(val, gsi_ctx->base + |
| 980 | GSI_EE_n_EV_CH_k_CNTXT_12_OFFS(evt_id, ee)); |
| 981 | |
| 982 | val = ((props->rp_update_addr >> 32) & |
| 983 | GSI_EE_n_EV_CH_k_CNTXT_13_RP_UPDATE_ADDR_MSB_BMSK) << |
| 984 | GSI_EE_n_EV_CH_k_CNTXT_13_RP_UPDATE_ADDR_MSB_SHFT; |
| 985 | gsi_writel(val, gsi_ctx->base + |
| 986 | GSI_EE_n_EV_CH_k_CNTXT_13_OFFS(evt_id, ee)); |
| 987 | } |
| 988 | |
| 989 | static void gsi_init_evt_ring(struct gsi_evt_ring_props *props, |
| 990 | struct gsi_ring_ctx *ctx) |
| 991 | { |
| 992 | ctx->base_va = (uintptr_t)props->ring_base_vaddr; |
| 993 | ctx->base = props->ring_base_addr; |
| 994 | ctx->wp = ctx->base; |
| 995 | ctx->rp = ctx->base; |
| 996 | ctx->wp_local = ctx->base; |
| 997 | ctx->rp_local = ctx->base; |
| 998 | ctx->len = props->ring_len; |
| 999 | ctx->elem_sz = props->re_size; |
| 1000 | ctx->max_num_elem = ctx->len / ctx->elem_sz - 1; |
| 1001 | ctx->end = ctx->base + (ctx->max_num_elem + 1) * ctx->elem_sz; |
| 1002 | } |
| 1003 | |
| 1004 | static void gsi_prime_evt_ring(struct gsi_evt_ctx *ctx) |
| 1005 | { |
| 1006 | unsigned long flags; |
| 1007 | |
| 1008 | spin_lock_irqsave(&ctx->ring.slock, flags); |
| 1009 | memset((void *)ctx->ring.base_va, 0, ctx->ring.len); |
| 1010 | ctx->ring.wp_local = ctx->ring.base + |
| 1011 | ctx->ring.max_num_elem * ctx->ring.elem_sz; |
| 1012 | gsi_ring_evt_doorbell(ctx); |
| 1013 | spin_unlock_irqrestore(&ctx->ring.slock, flags); |
| 1014 | } |
| 1015 | |
| 1016 | static int gsi_validate_evt_ring_props(struct gsi_evt_ring_props *props) |
| 1017 | { |
| 1018 | uint64_t ra; |
| 1019 | |
| 1020 | if ((props->re_size == GSI_EVT_RING_RE_SIZE_4B && |
| 1021 | props->ring_len % 4) || |
| 1022 | (props->re_size == GSI_EVT_RING_RE_SIZE_16B && |
| 1023 | props->ring_len % 16)) { |
| 1024 | GSIERR("bad params ring_len %u not a multiple of RE size %u\n", |
| 1025 | props->ring_len, props->re_size); |
| 1026 | return -GSI_STATUS_INVALID_PARAMS; |
| 1027 | } |
| 1028 | |
| 1029 | ra = props->ring_base_addr; |
| 1030 | do_div(ra, roundup_pow_of_two(props->ring_len)); |
| 1031 | |
| 1032 | if (props->ring_base_addr != ra * roundup_pow_of_two(props->ring_len)) { |
| 1033 | GSIERR("bad params ring base not aligned 0x%llx align 0x%lx\n", |
| 1034 | props->ring_base_addr, |
| 1035 | roundup_pow_of_two(props->ring_len)); |
| 1036 | return -GSI_STATUS_INVALID_PARAMS; |
| 1037 | } |
| 1038 | |
| 1039 | if (props->intf == GSI_EVT_CHTYPE_GPI_EV && |
| 1040 | !props->ring_base_vaddr) { |
| 1041 | GSIERR("protocol %u requires ring base VA\n", props->intf); |
| 1042 | return -GSI_STATUS_INVALID_PARAMS; |
| 1043 | } |
| 1044 | |
| 1045 | if (props->intf == GSI_EVT_CHTYPE_MHI_EV && |
| 1046 | (!props->evchid_valid || |
| 1047 | props->evchid > GSI_MHI_ER_END || |
| 1048 | props->evchid < GSI_MHI_ER_START)) { |
| 1049 | GSIERR("MHI requires evchid valid=%d val=%u\n", |
| 1050 | props->evchid_valid, props->evchid); |
| 1051 | return -GSI_STATUS_INVALID_PARAMS; |
| 1052 | } |
| 1053 | |
| 1054 | if (props->intf != GSI_EVT_CHTYPE_MHI_EV && |
| 1055 | props->evchid_valid) { |
| 1056 | GSIERR("protocol %u cannot specify evchid\n", props->intf); |
| 1057 | return -GSI_STATUS_INVALID_PARAMS; |
| 1058 | } |
| 1059 | |
| 1060 | if (!props->err_cb) { |
| 1061 | GSIERR("err callback must be provided\n"); |
| 1062 | return -GSI_STATUS_INVALID_PARAMS; |
| 1063 | } |
| 1064 | |
| 1065 | return GSI_STATUS_SUCCESS; |
| 1066 | } |
| 1067 | |
| 1068 | int gsi_alloc_evt_ring(struct gsi_evt_ring_props *props, unsigned long dev_hdl, |
| 1069 | unsigned long *evt_ring_hdl) |
| 1070 | { |
| 1071 | unsigned long evt_id; |
| 1072 | enum gsi_evt_ch_cmd_opcode op = GSI_EVT_ALLOCATE; |
| 1073 | uint32_t val; |
| 1074 | struct gsi_evt_ctx *ctx; |
| 1075 | int res; |
| 1076 | int ee = gsi_ctx->per.ee; |
| 1077 | unsigned long flags; |
| 1078 | |
| 1079 | if (!gsi_ctx) { |
| 1080 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1081 | return -GSI_STATUS_NODEV; |
| 1082 | } |
| 1083 | |
| 1084 | if (!props || !evt_ring_hdl || dev_hdl != (uintptr_t)gsi_ctx) { |
| 1085 | GSIERR("bad params props=%p dev_hdl=0x%lx evt_ring_hdl=%p\n", |
| 1086 | props, dev_hdl, evt_ring_hdl); |
| 1087 | return -GSI_STATUS_INVALID_PARAMS; |
| 1088 | } |
| 1089 | |
| 1090 | if (gsi_validate_evt_ring_props(props)) { |
| 1091 | GSIERR("invalid params\n"); |
| 1092 | return -GSI_STATUS_INVALID_PARAMS; |
| 1093 | } |
| 1094 | |
| 1095 | if (!props->evchid_valid) { |
| 1096 | mutex_lock(&gsi_ctx->mlock); |
| 1097 | evt_id = find_first_zero_bit(&gsi_ctx->evt_bmap, |
| 1098 | sizeof(unsigned long) * BITS_PER_BYTE); |
| 1099 | if (evt_id == sizeof(unsigned long) * BITS_PER_BYTE) { |
| 1100 | GSIERR("failed to alloc event ID\n"); |
| 1101 | mutex_unlock(&gsi_ctx->mlock); |
| 1102 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 1103 | } |
| 1104 | set_bit(evt_id, &gsi_ctx->evt_bmap); |
| 1105 | mutex_unlock(&gsi_ctx->mlock); |
| 1106 | } else { |
| 1107 | evt_id = props->evchid; |
| 1108 | } |
| 1109 | GSIDBG("Using %lu as virt evt id\n", evt_id); |
| 1110 | |
| 1111 | ctx = &gsi_ctx->evtr[evt_id]; |
| 1112 | memset(ctx, 0, sizeof(*ctx)); |
| 1113 | mutex_init(&ctx->mlock); |
| 1114 | init_completion(&ctx->compl); |
| 1115 | atomic_set(&ctx->chan_ref_cnt, 0); |
| 1116 | ctx->props = *props; |
| 1117 | |
| 1118 | mutex_lock(&gsi_ctx->mlock); |
| 1119 | val = (((evt_id << GSI_EE_n_EV_CH_CMD_CHID_SHFT) & |
| 1120 | GSI_EE_n_EV_CH_CMD_CHID_BMSK) | |
| 1121 | ((op << GSI_EE_n_EV_CH_CMD_OPCODE_SHFT) & |
| 1122 | GSI_EE_n_EV_CH_CMD_OPCODE_BMSK)); |
| 1123 | gsi_writel(val, gsi_ctx->base + |
| 1124 | GSI_EE_n_EV_CH_CMD_OFFS(ee)); |
| 1125 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1126 | if (res == 0) { |
| 1127 | GSIERR("evt_id=%lu timed out\n", evt_id); |
| 1128 | if (!props->evchid_valid) |
| 1129 | clear_bit(evt_id, &gsi_ctx->evt_bmap); |
| 1130 | mutex_unlock(&gsi_ctx->mlock); |
| 1131 | return -GSI_STATUS_TIMED_OUT; |
| 1132 | } |
| 1133 | |
| 1134 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1135 | GSIERR("evt_id=%lu allocation failed state=%u\n", |
| 1136 | evt_id, ctx->state); |
| 1137 | if (!props->evchid_valid) |
| 1138 | clear_bit(evt_id, &gsi_ctx->evt_bmap); |
| 1139 | mutex_unlock(&gsi_ctx->mlock); |
| 1140 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 1141 | } |
| 1142 | |
| 1143 | gsi_program_evt_ring_ctx(props, evt_id, gsi_ctx->per.ee); |
| 1144 | |
| 1145 | spin_lock_init(&ctx->ring.slock); |
| 1146 | gsi_init_evt_ring(props, &ctx->ring); |
| 1147 | |
| 1148 | ctx->id = evt_id; |
| 1149 | *evt_ring_hdl = evt_id; |
| 1150 | atomic_inc(&gsi_ctx->num_evt_ring); |
| 1151 | if (props->intf == GSI_EVT_CHTYPE_GPI_EV) |
| 1152 | gsi_prime_evt_ring(ctx); |
| 1153 | mutex_unlock(&gsi_ctx->mlock); |
| 1154 | |
| 1155 | spin_lock_irqsave(&gsi_ctx->slock, flags); |
| 1156 | gsi_writel(1 << evt_id, gsi_ctx->base + |
| 1157 | GSI_EE_n_CNTXT_SRC_IEOB_IRQ_CLR_OFFS(ee)); |
| 1158 | if (props->intf != GSI_EVT_CHTYPE_GPI_EV) |
| 1159 | __gsi_config_ieob_irq(gsi_ctx->per.ee, 1 << evt_id, 0); |
| 1160 | else |
| 1161 | __gsi_config_ieob_irq(gsi_ctx->per.ee, 1 << ctx->id, ~0); |
| 1162 | spin_unlock_irqrestore(&gsi_ctx->slock, flags); |
| 1163 | |
| 1164 | return GSI_STATUS_SUCCESS; |
| 1165 | } |
| 1166 | EXPORT_SYMBOL(gsi_alloc_evt_ring); |
| 1167 | |
| 1168 | static void __gsi_write_evt_ring_scratch(unsigned long evt_ring_hdl, |
| 1169 | union __packed gsi_evt_scratch val) |
| 1170 | { |
| 1171 | gsi_writel(val.data.word1, gsi_ctx->base + |
| 1172 | GSI_EE_n_EV_CH_k_SCRATCH_0_OFFS(evt_ring_hdl, |
| 1173 | gsi_ctx->per.ee)); |
| 1174 | gsi_writel(val.data.word2, gsi_ctx->base + |
| 1175 | GSI_EE_n_EV_CH_k_SCRATCH_1_OFFS(evt_ring_hdl, |
| 1176 | gsi_ctx->per.ee)); |
| 1177 | } |
| 1178 | |
| 1179 | int gsi_write_evt_ring_scratch(unsigned long evt_ring_hdl, |
| 1180 | union __packed gsi_evt_scratch val) |
| 1181 | { |
| 1182 | struct gsi_evt_ctx *ctx; |
| 1183 | |
| 1184 | if (!gsi_ctx) { |
| 1185 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1186 | return -GSI_STATUS_NODEV; |
| 1187 | } |
| 1188 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1189 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1190 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1191 | return -GSI_STATUS_INVALID_PARAMS; |
| 1192 | } |
| 1193 | |
| 1194 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1195 | |
| 1196 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1197 | GSIERR("bad state %d\n", |
| 1198 | gsi_ctx->evtr[evt_ring_hdl].state); |
| 1199 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1200 | } |
| 1201 | |
| 1202 | mutex_lock(&ctx->mlock); |
| 1203 | ctx->scratch = val; |
| 1204 | __gsi_write_evt_ring_scratch(evt_ring_hdl, val); |
| 1205 | mutex_unlock(&ctx->mlock); |
| 1206 | |
| 1207 | return GSI_STATUS_SUCCESS; |
| 1208 | } |
| 1209 | EXPORT_SYMBOL(gsi_write_evt_ring_scratch); |
| 1210 | |
| 1211 | int gsi_dealloc_evt_ring(unsigned long evt_ring_hdl) |
| 1212 | { |
| 1213 | uint32_t val; |
| 1214 | enum gsi_evt_ch_cmd_opcode op = GSI_EVT_DE_ALLOC; |
| 1215 | struct gsi_evt_ctx *ctx; |
| 1216 | int res; |
| 1217 | |
| 1218 | if (!gsi_ctx) { |
| 1219 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1220 | return -GSI_STATUS_NODEV; |
| 1221 | } |
| 1222 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1223 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1224 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1225 | return -GSI_STATUS_INVALID_PARAMS; |
| 1226 | } |
| 1227 | |
| 1228 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1229 | |
| 1230 | if (atomic_read(&ctx->chan_ref_cnt)) { |
| 1231 | GSIERR("%d channels still using this event ring\n", |
| 1232 | atomic_read(&ctx->chan_ref_cnt)); |
| 1233 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1234 | } |
| 1235 | |
| 1236 | /* TODO: add check for ERROR state */ |
| 1237 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1238 | GSIERR("bad state %d\n", ctx->state); |
| 1239 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1240 | } |
| 1241 | |
| 1242 | mutex_lock(&gsi_ctx->mlock); |
| 1243 | val = (((evt_ring_hdl << GSI_EE_n_EV_CH_CMD_CHID_SHFT) & |
| 1244 | GSI_EE_n_EV_CH_CMD_CHID_BMSK) | |
| 1245 | ((op << GSI_EE_n_EV_CH_CMD_OPCODE_SHFT) & |
| 1246 | GSI_EE_n_EV_CH_CMD_OPCODE_BMSK)); |
| 1247 | gsi_writel(val, gsi_ctx->base + |
| 1248 | GSI_EE_n_EV_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1249 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1250 | if (res == 0) { |
| 1251 | GSIERR("evt_id=%lu timed out\n", evt_ring_hdl); |
| 1252 | mutex_unlock(&gsi_ctx->mlock); |
| 1253 | return -GSI_STATUS_TIMED_OUT; |
| 1254 | } |
| 1255 | |
| 1256 | if (ctx->state != GSI_EVT_RING_STATE_NOT_ALLOCATED) { |
| 1257 | GSIERR("evt_id=%lu unexpected state=%u\n", evt_ring_hdl, |
| 1258 | ctx->state); |
| 1259 | BUG(); |
| 1260 | } |
| 1261 | mutex_unlock(&gsi_ctx->mlock); |
| 1262 | |
| 1263 | if (!ctx->props.evchid_valid) { |
| 1264 | mutex_lock(&gsi_ctx->mlock); |
| 1265 | clear_bit(evt_ring_hdl, &gsi_ctx->evt_bmap); |
| 1266 | mutex_unlock(&gsi_ctx->mlock); |
| 1267 | } |
| 1268 | atomic_dec(&gsi_ctx->num_evt_ring); |
| 1269 | |
| 1270 | return GSI_STATUS_SUCCESS; |
| 1271 | } |
| 1272 | EXPORT_SYMBOL(gsi_dealloc_evt_ring); |
| 1273 | |
| 1274 | int gsi_query_evt_ring_db_addr(unsigned long evt_ring_hdl, |
| 1275 | uint32_t *db_addr_wp_lsb, uint32_t *db_addr_wp_msb) |
| 1276 | { |
| 1277 | struct gsi_evt_ctx *ctx; |
| 1278 | |
| 1279 | if (!gsi_ctx) { |
| 1280 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1281 | return -GSI_STATUS_NODEV; |
| 1282 | } |
| 1283 | |
| 1284 | if (!db_addr_wp_msb || !db_addr_wp_lsb) { |
| 1285 | GSIERR("bad params msb=%p lsb=%p\n", db_addr_wp_msb, |
| 1286 | db_addr_wp_lsb); |
| 1287 | return -GSI_STATUS_INVALID_PARAMS; |
| 1288 | } |
| 1289 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1290 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1291 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1292 | return -GSI_STATUS_INVALID_PARAMS; |
| 1293 | } |
| 1294 | |
| 1295 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1296 | |
| 1297 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1298 | GSIERR("bad state %d\n", |
| 1299 | gsi_ctx->evtr[evt_ring_hdl].state); |
| 1300 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1301 | } |
| 1302 | |
| 1303 | *db_addr_wp_lsb = gsi_ctx->per.phys_addr + |
| 1304 | GSI_EE_n_EV_CH_k_DOORBELL_0_OFFS(evt_ring_hdl, gsi_ctx->per.ee); |
| 1305 | *db_addr_wp_msb = gsi_ctx->per.phys_addr + |
| 1306 | GSI_EE_n_EV_CH_k_DOORBELL_1_OFFS(evt_ring_hdl, gsi_ctx->per.ee); |
| 1307 | |
| 1308 | return GSI_STATUS_SUCCESS; |
| 1309 | } |
| 1310 | EXPORT_SYMBOL(gsi_query_evt_ring_db_addr); |
| 1311 | |
| 1312 | int gsi_reset_evt_ring(unsigned long evt_ring_hdl) |
| 1313 | { |
| 1314 | uint32_t val; |
| 1315 | enum gsi_evt_ch_cmd_opcode op = GSI_EVT_RESET; |
| 1316 | struct gsi_evt_ctx *ctx; |
| 1317 | int res; |
| 1318 | |
| 1319 | if (!gsi_ctx) { |
| 1320 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1321 | return -GSI_STATUS_NODEV; |
| 1322 | } |
| 1323 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1324 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1325 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1326 | return -GSI_STATUS_INVALID_PARAMS; |
| 1327 | } |
| 1328 | |
| 1329 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1330 | |
| 1331 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1332 | GSIERR("bad state %d\n", ctx->state); |
| 1333 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1334 | } |
| 1335 | |
| 1336 | mutex_lock(&gsi_ctx->mlock); |
| 1337 | val = (((evt_ring_hdl << GSI_EE_n_EV_CH_CMD_CHID_SHFT) & |
| 1338 | GSI_EE_n_EV_CH_CMD_CHID_BMSK) | |
| 1339 | ((op << GSI_EE_n_EV_CH_CMD_OPCODE_SHFT) & |
| 1340 | GSI_EE_n_EV_CH_CMD_OPCODE_BMSK)); |
| 1341 | gsi_writel(val, gsi_ctx->base + |
| 1342 | GSI_EE_n_EV_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1343 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1344 | if (res == 0) { |
| 1345 | GSIERR("evt_id=%lu timed out\n", evt_ring_hdl); |
| 1346 | mutex_unlock(&gsi_ctx->mlock); |
| 1347 | return -GSI_STATUS_TIMED_OUT; |
| 1348 | } |
| 1349 | |
| 1350 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1351 | GSIERR("evt_id=%lu unexpected state=%u\n", evt_ring_hdl, |
| 1352 | ctx->state); |
| 1353 | BUG(); |
| 1354 | } |
| 1355 | |
| 1356 | gsi_program_evt_ring_ctx(&ctx->props, evt_ring_hdl, gsi_ctx->per.ee); |
| 1357 | gsi_init_evt_ring(&ctx->props, &ctx->ring); |
| 1358 | |
| 1359 | /* restore scratch */ |
| 1360 | __gsi_write_evt_ring_scratch(evt_ring_hdl, ctx->scratch); |
| 1361 | |
| 1362 | if (ctx->props.intf == GSI_EVT_CHTYPE_GPI_EV) |
| 1363 | gsi_prime_evt_ring(ctx); |
| 1364 | mutex_unlock(&gsi_ctx->mlock); |
| 1365 | |
| 1366 | return GSI_STATUS_SUCCESS; |
| 1367 | } |
| 1368 | EXPORT_SYMBOL(gsi_reset_evt_ring); |
| 1369 | |
| 1370 | int gsi_get_evt_ring_cfg(unsigned long evt_ring_hdl, |
| 1371 | struct gsi_evt_ring_props *props, union gsi_evt_scratch *scr) |
| 1372 | { |
| 1373 | struct gsi_evt_ctx *ctx; |
| 1374 | |
| 1375 | if (!gsi_ctx) { |
| 1376 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1377 | return -GSI_STATUS_NODEV; |
| 1378 | } |
| 1379 | |
| 1380 | if (!props || !scr) { |
| 1381 | GSIERR("bad params props=%p scr=%p\n", props, scr); |
| 1382 | return -GSI_STATUS_INVALID_PARAMS; |
| 1383 | } |
| 1384 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1385 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1386 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1387 | return -GSI_STATUS_INVALID_PARAMS; |
| 1388 | } |
| 1389 | |
| 1390 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1391 | |
| 1392 | if (ctx->state == GSI_EVT_RING_STATE_NOT_ALLOCATED) { |
| 1393 | GSIERR("bad state %d\n", ctx->state); |
| 1394 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1395 | } |
| 1396 | |
| 1397 | mutex_lock(&ctx->mlock); |
| 1398 | *props = ctx->props; |
| 1399 | *scr = ctx->scratch; |
| 1400 | mutex_unlock(&ctx->mlock); |
| 1401 | |
| 1402 | return GSI_STATUS_SUCCESS; |
| 1403 | } |
| 1404 | EXPORT_SYMBOL(gsi_get_evt_ring_cfg); |
| 1405 | |
| 1406 | int gsi_set_evt_ring_cfg(unsigned long evt_ring_hdl, |
| 1407 | struct gsi_evt_ring_props *props, union gsi_evt_scratch *scr) |
| 1408 | { |
| 1409 | struct gsi_evt_ctx *ctx; |
| 1410 | |
| 1411 | if (!gsi_ctx) { |
| 1412 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1413 | return -GSI_STATUS_NODEV; |
| 1414 | } |
| 1415 | |
| 1416 | if (!props || gsi_validate_evt_ring_props(props)) { |
| 1417 | GSIERR("bad params props=%p\n", props); |
| 1418 | return -GSI_STATUS_INVALID_PARAMS; |
| 1419 | } |
| 1420 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1421 | if (evt_ring_hdl >= gsi_ctx->max_ev) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1422 | GSIERR("bad params evt_ring_hdl=%lu\n", evt_ring_hdl); |
| 1423 | return -GSI_STATUS_INVALID_PARAMS; |
| 1424 | } |
| 1425 | |
| 1426 | ctx = &gsi_ctx->evtr[evt_ring_hdl]; |
| 1427 | |
| 1428 | if (ctx->state != GSI_EVT_RING_STATE_ALLOCATED) { |
| 1429 | GSIERR("bad state %d\n", ctx->state); |
| 1430 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1431 | } |
| 1432 | |
| 1433 | if (ctx->props.exclusive != props->exclusive) { |
| 1434 | GSIERR("changing immutable fields not supported\n"); |
| 1435 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1436 | } |
| 1437 | |
| 1438 | mutex_lock(&ctx->mlock); |
| 1439 | ctx->props = *props; |
| 1440 | if (scr) |
| 1441 | ctx->scratch = *scr; |
| 1442 | mutex_unlock(&ctx->mlock); |
| 1443 | |
| 1444 | return gsi_reset_evt_ring(evt_ring_hdl); |
| 1445 | } |
| 1446 | EXPORT_SYMBOL(gsi_set_evt_ring_cfg); |
| 1447 | |
| 1448 | static void gsi_program_chan_ctx(struct gsi_chan_props *props, unsigned int ee, |
| 1449 | uint8_t erindex) |
| 1450 | { |
| 1451 | uint32_t val; |
| 1452 | |
| 1453 | val = (((props->prot << GSI_EE_n_GSI_CH_k_CNTXT_0_CHTYPE_PROTOCOL_SHFT) |
| 1454 | & GSI_EE_n_GSI_CH_k_CNTXT_0_CHTYPE_PROTOCOL_BMSK) | |
| 1455 | ((props->dir << GSI_EE_n_GSI_CH_k_CNTXT_0_CHTYPE_DIR_SHFT) & |
| 1456 | GSI_EE_n_GSI_CH_k_CNTXT_0_CHTYPE_DIR_BMSK) | |
| 1457 | ((erindex << GSI_EE_n_GSI_CH_k_CNTXT_0_ERINDEX_SHFT) & |
| 1458 | GSI_EE_n_GSI_CH_k_CNTXT_0_ERINDEX_BMSK) | |
| 1459 | ((props->re_size << GSI_EE_n_GSI_CH_k_CNTXT_0_ELEMENT_SIZE_SHFT) |
| 1460 | & GSI_EE_n_GSI_CH_k_CNTXT_0_ELEMENT_SIZE_BMSK)); |
| 1461 | gsi_writel(val, gsi_ctx->base + |
| 1462 | GSI_EE_n_GSI_CH_k_CNTXT_0_OFFS(props->ch_id, ee)); |
| 1463 | |
| 1464 | val = (props->ring_len & GSI_EE_n_GSI_CH_k_CNTXT_1_R_LENGTH_BMSK) << |
| 1465 | GSI_EE_n_GSI_CH_k_CNTXT_1_R_LENGTH_SHFT; |
| 1466 | gsi_writel(val, gsi_ctx->base + |
| 1467 | GSI_EE_n_GSI_CH_k_CNTXT_1_OFFS(props->ch_id, ee)); |
| 1468 | |
| 1469 | val = (props->ring_base_addr & |
| 1470 | GSI_EE_n_GSI_CH_k_CNTXT_2_R_BASE_ADDR_LSBS_BMSK) << |
| 1471 | GSI_EE_n_GSI_CH_k_CNTXT_2_R_BASE_ADDR_LSBS_SHFT; |
| 1472 | gsi_writel(val, gsi_ctx->base + |
| 1473 | GSI_EE_n_GSI_CH_k_CNTXT_2_OFFS(props->ch_id, ee)); |
| 1474 | |
| 1475 | val = ((props->ring_base_addr >> 32) & |
| 1476 | GSI_EE_n_GSI_CH_k_CNTXT_3_R_BASE_ADDR_MSBS_BMSK) << |
| 1477 | GSI_EE_n_GSI_CH_k_CNTXT_3_R_BASE_ADDR_MSBS_SHFT; |
| 1478 | gsi_writel(val, gsi_ctx->base + |
| 1479 | GSI_EE_n_GSI_CH_k_CNTXT_3_OFFS(props->ch_id, ee)); |
| 1480 | |
| 1481 | val = (((props->low_weight << GSI_EE_n_GSI_CH_k_QOS_WRR_WEIGHT_SHFT) & |
| 1482 | GSI_EE_n_GSI_CH_k_QOS_WRR_WEIGHT_BMSK) | |
| 1483 | ((props->max_prefetch << |
| 1484 | GSI_EE_n_GSI_CH_k_QOS_MAX_PREFETCH_SHFT) & |
| 1485 | GSI_EE_n_GSI_CH_k_QOS_MAX_PREFETCH_BMSK) | |
| 1486 | ((props->use_db_eng << GSI_EE_n_GSI_CH_k_QOS_USE_DB_ENG_SHFT) & |
| 1487 | GSI_EE_n_GSI_CH_k_QOS_USE_DB_ENG_BMSK)); |
| 1488 | gsi_writel(val, gsi_ctx->base + |
| 1489 | GSI_EE_n_GSI_CH_k_QOS_OFFS(props->ch_id, ee)); |
| 1490 | } |
| 1491 | |
| 1492 | static void gsi_init_chan_ring(struct gsi_chan_props *props, |
| 1493 | struct gsi_ring_ctx *ctx) |
| 1494 | { |
| 1495 | ctx->base_va = (uintptr_t)props->ring_base_vaddr; |
| 1496 | ctx->base = props->ring_base_addr; |
| 1497 | ctx->wp = ctx->base; |
| 1498 | ctx->rp = ctx->base; |
| 1499 | ctx->wp_local = ctx->base; |
| 1500 | ctx->rp_local = ctx->base; |
| 1501 | ctx->len = props->ring_len; |
| 1502 | ctx->elem_sz = props->re_size; |
| 1503 | ctx->max_num_elem = ctx->len / ctx->elem_sz - 1; |
| 1504 | ctx->end = ctx->base + (ctx->max_num_elem + 1) * |
| 1505 | ctx->elem_sz; |
| 1506 | } |
| 1507 | |
| 1508 | static int gsi_validate_channel_props(struct gsi_chan_props *props) |
| 1509 | { |
| 1510 | uint64_t ra; |
| 1511 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1512 | if (props->ch_id >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1513 | GSIERR("ch_id %u invalid\n", props->ch_id); |
| 1514 | return -GSI_STATUS_INVALID_PARAMS; |
| 1515 | } |
| 1516 | |
| 1517 | if ((props->re_size == GSI_CHAN_RE_SIZE_4B && |
| 1518 | props->ring_len % 4) || |
| 1519 | (props->re_size == GSI_CHAN_RE_SIZE_16B && |
| 1520 | props->ring_len % 16) || |
| 1521 | (props->re_size == GSI_CHAN_RE_SIZE_32B && |
| 1522 | props->ring_len % 32)) { |
| 1523 | GSIERR("bad params ring_len %u not a multiple of re size %u\n", |
| 1524 | props->ring_len, props->re_size); |
| 1525 | return -GSI_STATUS_INVALID_PARAMS; |
| 1526 | } |
| 1527 | |
| 1528 | ra = props->ring_base_addr; |
| 1529 | do_div(ra, roundup_pow_of_two(props->ring_len)); |
| 1530 | |
| 1531 | if (props->ring_base_addr != ra * roundup_pow_of_two(props->ring_len)) { |
| 1532 | GSIERR("bad params ring base not aligned 0x%llx align 0x%lx\n", |
| 1533 | props->ring_base_addr, |
| 1534 | roundup_pow_of_two(props->ring_len)); |
| 1535 | return -GSI_STATUS_INVALID_PARAMS; |
| 1536 | } |
| 1537 | |
| 1538 | if (props->prot == GSI_CHAN_PROT_GPI && |
| 1539 | !props->ring_base_vaddr) { |
| 1540 | GSIERR("protocol %u requires ring base VA\n", props->prot); |
| 1541 | return -GSI_STATUS_INVALID_PARAMS; |
| 1542 | } |
| 1543 | |
| 1544 | if (props->low_weight > GSI_MAX_CH_LOW_WEIGHT) { |
| 1545 | GSIERR("invalid channel low weight %u\n", props->low_weight); |
| 1546 | return -GSI_STATUS_INVALID_PARAMS; |
| 1547 | } |
| 1548 | |
| 1549 | if (props->prot == GSI_CHAN_PROT_GPI && !props->xfer_cb) { |
| 1550 | GSIERR("xfer callback must be provided\n"); |
| 1551 | return -GSI_STATUS_INVALID_PARAMS; |
| 1552 | } |
| 1553 | |
| 1554 | if (!props->err_cb) { |
| 1555 | GSIERR("err callback must be provided\n"); |
| 1556 | return -GSI_STATUS_INVALID_PARAMS; |
| 1557 | } |
| 1558 | |
| 1559 | return GSI_STATUS_SUCCESS; |
| 1560 | } |
| 1561 | |
| 1562 | int gsi_alloc_channel(struct gsi_chan_props *props, unsigned long dev_hdl, |
| 1563 | unsigned long *chan_hdl) |
| 1564 | { |
| 1565 | struct gsi_chan_ctx *ctx; |
| 1566 | uint32_t val; |
| 1567 | int res; |
| 1568 | int ee = gsi_ctx->per.ee; |
| 1569 | enum gsi_ch_cmd_opcode op = GSI_CH_ALLOCATE; |
| 1570 | uint8_t erindex; |
| 1571 | void **user_data; |
| 1572 | |
| 1573 | if (!gsi_ctx) { |
| 1574 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1575 | return -GSI_STATUS_NODEV; |
| 1576 | } |
| 1577 | |
| 1578 | if (!props || !chan_hdl || dev_hdl != (uintptr_t)gsi_ctx) { |
| 1579 | GSIERR("bad params props=%p dev_hdl=0x%lx chan_hdl=%p\n", |
| 1580 | props, dev_hdl, chan_hdl); |
| 1581 | return -GSI_STATUS_INVALID_PARAMS; |
| 1582 | } |
| 1583 | |
| 1584 | if (gsi_validate_channel_props(props)) { |
| 1585 | GSIERR("bad params\n"); |
| 1586 | return -GSI_STATUS_INVALID_PARAMS; |
| 1587 | } |
| 1588 | |
| 1589 | if (props->evt_ring_hdl != ~0 && |
| 1590 | atomic_read(&gsi_ctx->evtr[props->evt_ring_hdl].chan_ref_cnt) && |
| 1591 | gsi_ctx->evtr[props->evt_ring_hdl].props.exclusive) { |
| 1592 | GSIERR("evt ring=%lu already in exclusive use chan_hdl=%p\n", |
| 1593 | props->evt_ring_hdl, chan_hdl); |
| 1594 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1595 | } |
| 1596 | |
| 1597 | |
| 1598 | ctx = &gsi_ctx->chan[props->ch_id]; |
| 1599 | if (ctx->allocated) { |
| 1600 | GSIERR("chan %d already allocated\n", props->ch_id); |
| 1601 | return -GSI_STATUS_NODEV; |
| 1602 | } |
| 1603 | |
| 1604 | memset(ctx, 0, sizeof(*ctx)); |
| 1605 | user_data = devm_kzalloc(gsi_ctx->dev, |
| 1606 | (props->ring_len / props->re_size) * sizeof(void *), |
| 1607 | GFP_KERNEL); |
| 1608 | if (user_data == NULL) { |
| 1609 | GSIERR("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1610 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 1611 | } |
| 1612 | |
| 1613 | mutex_init(&ctx->mlock); |
| 1614 | init_completion(&ctx->compl); |
| 1615 | atomic_set(&ctx->poll_mode, GSI_CHAN_MODE_CALLBACK); |
| 1616 | ctx->props = *props; |
| 1617 | |
| 1618 | mutex_lock(&gsi_ctx->mlock); |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 1619 | gsi_ctx->ch_dbg[props->ch_id].ch_allocate++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1620 | val = (((props->ch_id << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 1621 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 1622 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 1623 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 1624 | gsi_writel(val, gsi_ctx->base + |
| 1625 | GSI_EE_n_GSI_CH_CMD_OFFS(ee)); |
| 1626 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1627 | if (res == 0) { |
| 1628 | GSIERR("chan_hdl=%u timed out\n", props->ch_id); |
| 1629 | mutex_unlock(&gsi_ctx->mlock); |
| 1630 | devm_kfree(gsi_ctx->dev, user_data); |
| 1631 | return -GSI_STATUS_TIMED_OUT; |
| 1632 | } |
| 1633 | if (ctx->state != GSI_CHAN_STATE_ALLOCATED) { |
| 1634 | GSIERR("chan_hdl=%u allocation failed state=%d\n", |
| 1635 | props->ch_id, ctx->state); |
| 1636 | mutex_unlock(&gsi_ctx->mlock); |
| 1637 | devm_kfree(gsi_ctx->dev, user_data); |
| 1638 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 1639 | } |
| 1640 | mutex_unlock(&gsi_ctx->mlock); |
| 1641 | |
| 1642 | erindex = props->evt_ring_hdl != ~0 ? props->evt_ring_hdl : |
| 1643 | GSI_NO_EVT_ERINDEX; |
| 1644 | if (erindex != GSI_NO_EVT_ERINDEX) { |
| 1645 | ctx->evtr = &gsi_ctx->evtr[erindex]; |
| 1646 | atomic_inc(&ctx->evtr->chan_ref_cnt); |
| 1647 | if (ctx->evtr->props.exclusive) |
| 1648 | ctx->evtr->chan = ctx; |
| 1649 | } |
| 1650 | |
| 1651 | gsi_program_chan_ctx(props, gsi_ctx->per.ee, erindex); |
| 1652 | |
| 1653 | spin_lock_init(&ctx->ring.slock); |
| 1654 | gsi_init_chan_ring(props, &ctx->ring); |
| 1655 | if (!props->max_re_expected) |
| 1656 | ctx->props.max_re_expected = ctx->ring.max_num_elem; |
| 1657 | ctx->user_data = user_data; |
| 1658 | *chan_hdl = props->ch_id; |
| 1659 | ctx->allocated = true; |
| 1660 | ctx->stats.dp.last_timestamp = jiffies_to_msecs(jiffies); |
| 1661 | atomic_inc(&gsi_ctx->num_chan); |
| 1662 | |
| 1663 | return GSI_STATUS_SUCCESS; |
| 1664 | } |
| 1665 | EXPORT_SYMBOL(gsi_alloc_channel); |
| 1666 | |
| 1667 | static void __gsi_write_channel_scratch(unsigned long chan_hdl, |
| 1668 | union __packed gsi_channel_scratch val) |
| 1669 | { |
| 1670 | uint32_t reg; |
| 1671 | |
| 1672 | gsi_writel(val.data.word1, gsi_ctx->base + |
| 1673 | GSI_EE_n_GSI_CH_k_SCRATCH_0_OFFS(chan_hdl, |
| 1674 | gsi_ctx->per.ee)); |
| 1675 | gsi_writel(val.data.word2, gsi_ctx->base + |
| 1676 | GSI_EE_n_GSI_CH_k_SCRATCH_1_OFFS(chan_hdl, |
| 1677 | gsi_ctx->per.ee)); |
| 1678 | gsi_writel(val.data.word3, gsi_ctx->base + |
| 1679 | GSI_EE_n_GSI_CH_k_SCRATCH_2_OFFS(chan_hdl, |
| 1680 | gsi_ctx->per.ee)); |
| 1681 | /* below sequence is not atomic. assumption is sequencer specific fields |
| 1682 | * will remain unchanged across this sequence |
| 1683 | */ |
| 1684 | reg = gsi_readl(gsi_ctx->base + |
| 1685 | GSI_EE_n_GSI_CH_k_SCRATCH_3_OFFS(chan_hdl, |
| 1686 | gsi_ctx->per.ee)); |
| 1687 | reg &= 0xFFFF; |
| 1688 | reg |= (val.data.word4 & 0xFFFF0000); |
| 1689 | gsi_writel(reg, gsi_ctx->base + |
| 1690 | GSI_EE_n_GSI_CH_k_SCRATCH_3_OFFS(chan_hdl, |
| 1691 | gsi_ctx->per.ee)); |
| 1692 | } |
| 1693 | |
| 1694 | int gsi_write_channel_scratch(unsigned long chan_hdl, |
| 1695 | union __packed gsi_channel_scratch val) |
| 1696 | { |
| 1697 | struct gsi_chan_ctx *ctx; |
| 1698 | |
| 1699 | if (!gsi_ctx) { |
| 1700 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1701 | return -GSI_STATUS_NODEV; |
| 1702 | } |
| 1703 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1704 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1705 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1706 | return -GSI_STATUS_INVALID_PARAMS; |
| 1707 | } |
| 1708 | |
| 1709 | if (gsi_ctx->chan[chan_hdl].state != GSI_CHAN_STATE_ALLOCATED && |
| 1710 | gsi_ctx->chan[chan_hdl].state != GSI_CHAN_STATE_STOPPED) { |
| 1711 | GSIERR("bad state %d\n", |
| 1712 | gsi_ctx->chan[chan_hdl].state); |
| 1713 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1714 | } |
| 1715 | |
| 1716 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 1717 | |
| 1718 | mutex_lock(&ctx->mlock); |
| 1719 | ctx->scratch = val; |
| 1720 | __gsi_write_channel_scratch(chan_hdl, val); |
| 1721 | mutex_unlock(&ctx->mlock); |
| 1722 | |
| 1723 | return GSI_STATUS_SUCCESS; |
| 1724 | } |
| 1725 | EXPORT_SYMBOL(gsi_write_channel_scratch); |
| 1726 | |
| 1727 | int gsi_query_channel_db_addr(unsigned long chan_hdl, |
| 1728 | uint32_t *db_addr_wp_lsb, uint32_t *db_addr_wp_msb) |
| 1729 | { |
| 1730 | if (!gsi_ctx) { |
| 1731 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1732 | return -GSI_STATUS_NODEV; |
| 1733 | } |
| 1734 | |
| 1735 | if (!db_addr_wp_msb || !db_addr_wp_lsb) { |
| 1736 | GSIERR("bad params msb=%p lsb=%p\n", db_addr_wp_msb, |
| 1737 | db_addr_wp_lsb); |
| 1738 | return -GSI_STATUS_INVALID_PARAMS; |
| 1739 | } |
| 1740 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1741 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1742 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1743 | return -GSI_STATUS_INVALID_PARAMS; |
| 1744 | } |
| 1745 | |
| 1746 | if (gsi_ctx->chan[chan_hdl].state == GSI_CHAN_STATE_NOT_ALLOCATED) { |
| 1747 | GSIERR("bad state %d\n", |
| 1748 | gsi_ctx->chan[chan_hdl].state); |
| 1749 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1750 | } |
| 1751 | |
| 1752 | *db_addr_wp_lsb = gsi_ctx->per.phys_addr + |
| 1753 | GSI_EE_n_GSI_CH_k_DOORBELL_0_OFFS(chan_hdl, gsi_ctx->per.ee); |
| 1754 | *db_addr_wp_msb = gsi_ctx->per.phys_addr + |
| 1755 | GSI_EE_n_GSI_CH_k_DOORBELL_1_OFFS(chan_hdl, gsi_ctx->per.ee); |
| 1756 | |
| 1757 | return GSI_STATUS_SUCCESS; |
| 1758 | } |
| 1759 | EXPORT_SYMBOL(gsi_query_channel_db_addr); |
| 1760 | |
| 1761 | int gsi_start_channel(unsigned long chan_hdl) |
| 1762 | { |
| 1763 | enum gsi_ch_cmd_opcode op = GSI_CH_START; |
| 1764 | int res; |
| 1765 | uint32_t val; |
| 1766 | struct gsi_chan_ctx *ctx; |
| 1767 | |
| 1768 | if (!gsi_ctx) { |
| 1769 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1770 | return -GSI_STATUS_NODEV; |
| 1771 | } |
| 1772 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1773 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1774 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1775 | return -GSI_STATUS_INVALID_PARAMS; |
| 1776 | } |
| 1777 | |
| 1778 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 1779 | |
| 1780 | if (ctx->state != GSI_CHAN_STATE_ALLOCATED && |
| 1781 | ctx->state != GSI_CHAN_STATE_STOP_IN_PROC && |
| 1782 | ctx->state != GSI_CHAN_STATE_STOPPED) { |
| 1783 | GSIERR("bad state %d\n", ctx->state); |
| 1784 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1785 | } |
| 1786 | |
| 1787 | mutex_lock(&gsi_ctx->mlock); |
| 1788 | init_completion(&ctx->compl); |
| 1789 | |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 1790 | gsi_ctx->ch_dbg[chan_hdl].ch_start++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1791 | val = (((chan_hdl << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 1792 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 1793 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 1794 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 1795 | gsi_writel(val, gsi_ctx->base + |
| 1796 | GSI_EE_n_GSI_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1797 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1798 | if (res == 0) { |
| 1799 | GSIERR("chan_hdl=%lu timed out\n", chan_hdl); |
| 1800 | mutex_unlock(&gsi_ctx->mlock); |
| 1801 | return -GSI_STATUS_TIMED_OUT; |
| 1802 | } |
| 1803 | if (ctx->state != GSI_CHAN_STATE_STARTED) { |
| 1804 | GSIERR("chan=%lu unexpected state=%u\n", chan_hdl, ctx->state); |
| 1805 | BUG(); |
| 1806 | } |
| 1807 | |
| 1808 | mutex_unlock(&gsi_ctx->mlock); |
| 1809 | |
| 1810 | return GSI_STATUS_SUCCESS; |
| 1811 | } |
| 1812 | EXPORT_SYMBOL(gsi_start_channel); |
| 1813 | |
| 1814 | int gsi_stop_channel(unsigned long chan_hdl) |
| 1815 | { |
| 1816 | enum gsi_ch_cmd_opcode op = GSI_CH_STOP; |
| 1817 | int res; |
| 1818 | uint32_t val; |
| 1819 | struct gsi_chan_ctx *ctx; |
| 1820 | |
| 1821 | if (!gsi_ctx) { |
| 1822 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1823 | return -GSI_STATUS_NODEV; |
| 1824 | } |
| 1825 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1826 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1827 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1828 | return -GSI_STATUS_INVALID_PARAMS; |
| 1829 | } |
| 1830 | |
| 1831 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 1832 | |
| 1833 | if (ctx->state == GSI_CHAN_STATE_STOPPED) { |
| 1834 | GSIDBG("chan_hdl=%lu already stopped\n", chan_hdl); |
| 1835 | return GSI_STATUS_SUCCESS; |
| 1836 | } |
| 1837 | |
| 1838 | if (ctx->state != GSI_CHAN_STATE_STARTED && |
| 1839 | ctx->state != GSI_CHAN_STATE_STOP_IN_PROC && |
| 1840 | ctx->state != GSI_CHAN_STATE_ERROR) { |
| 1841 | GSIERR("bad state %d\n", ctx->state); |
| 1842 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1843 | } |
| 1844 | |
| 1845 | mutex_lock(&gsi_ctx->mlock); |
| 1846 | init_completion(&ctx->compl); |
| 1847 | |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 1848 | gsi_ctx->ch_dbg[chan_hdl].ch_stop++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1849 | val = (((chan_hdl << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 1850 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 1851 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 1852 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 1853 | gsi_writel(val, gsi_ctx->base + |
| 1854 | GSI_EE_n_GSI_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1855 | res = wait_for_completion_timeout(&ctx->compl, |
| 1856 | msecs_to_jiffies(GSI_STOP_CMD_TIMEOUT_MS)); |
| 1857 | if (res == 0) { |
| 1858 | GSIDBG("chan_hdl=%lu timed out\n", chan_hdl); |
| 1859 | res = -GSI_STATUS_TIMED_OUT; |
| 1860 | goto free_lock; |
| 1861 | } |
| 1862 | |
| 1863 | if (ctx->state != GSI_CHAN_STATE_STOPPED && |
| 1864 | ctx->state != GSI_CHAN_STATE_STOP_IN_PROC) { |
| 1865 | GSIERR("chan=%lu unexpected state=%u\n", chan_hdl, ctx->state); |
| 1866 | res = -GSI_STATUS_BAD_STATE; |
| 1867 | goto free_lock; |
| 1868 | } |
| 1869 | |
| 1870 | if (ctx->state == GSI_CHAN_STATE_STOP_IN_PROC) { |
| 1871 | GSIERR("chan=%lu busy try again\n", chan_hdl); |
| 1872 | res = -GSI_STATUS_AGAIN; |
| 1873 | goto free_lock; |
| 1874 | } |
| 1875 | |
| 1876 | res = GSI_STATUS_SUCCESS; |
| 1877 | |
| 1878 | free_lock: |
| 1879 | mutex_unlock(&gsi_ctx->mlock); |
| 1880 | return res; |
| 1881 | } |
| 1882 | EXPORT_SYMBOL(gsi_stop_channel); |
| 1883 | |
| 1884 | int gsi_stop_db_channel(unsigned long chan_hdl) |
| 1885 | { |
| 1886 | enum gsi_ch_cmd_opcode op = GSI_CH_DB_STOP; |
| 1887 | int res; |
| 1888 | uint32_t val; |
| 1889 | struct gsi_chan_ctx *ctx; |
| 1890 | |
| 1891 | if (!gsi_ctx) { |
| 1892 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1893 | return -GSI_STATUS_NODEV; |
| 1894 | } |
| 1895 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1896 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1897 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1898 | return -GSI_STATUS_INVALID_PARAMS; |
| 1899 | } |
| 1900 | |
| 1901 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 1902 | |
| 1903 | if (ctx->state == GSI_CHAN_STATE_STOPPED) { |
| 1904 | GSIDBG("chan_hdl=%lu already stopped\n", chan_hdl); |
| 1905 | return GSI_STATUS_SUCCESS; |
| 1906 | } |
| 1907 | |
| 1908 | if (ctx->state != GSI_CHAN_STATE_STARTED && |
| 1909 | ctx->state != GSI_CHAN_STATE_STOP_IN_PROC) { |
| 1910 | GSIERR("bad state %d\n", ctx->state); |
| 1911 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1912 | } |
| 1913 | |
| 1914 | mutex_lock(&gsi_ctx->mlock); |
| 1915 | init_completion(&ctx->compl); |
| 1916 | |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 1917 | gsi_ctx->ch_dbg[chan_hdl].ch_db_stop++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1918 | val = (((chan_hdl << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 1919 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 1920 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 1921 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 1922 | gsi_writel(val, gsi_ctx->base + |
| 1923 | GSI_EE_n_GSI_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1924 | res = wait_for_completion_timeout(&ctx->compl, |
| 1925 | msecs_to_jiffies(GSI_STOP_CMD_TIMEOUT_MS)); |
| 1926 | if (res == 0) { |
| 1927 | GSIERR("chan_hdl=%lu timed out\n", chan_hdl); |
| 1928 | res = -GSI_STATUS_TIMED_OUT; |
| 1929 | goto free_lock; |
| 1930 | } |
| 1931 | |
| 1932 | if (ctx->state != GSI_CHAN_STATE_STOPPED && |
| 1933 | ctx->state != GSI_CHAN_STATE_STOP_IN_PROC) { |
| 1934 | GSIERR("chan=%lu unexpected state=%u\n", chan_hdl, ctx->state); |
| 1935 | res = -GSI_STATUS_BAD_STATE; |
| 1936 | goto free_lock; |
| 1937 | } |
| 1938 | |
| 1939 | if (ctx->state == GSI_CHAN_STATE_STOP_IN_PROC) { |
| 1940 | GSIERR("chan=%lu busy try again\n", chan_hdl); |
| 1941 | res = -GSI_STATUS_AGAIN; |
| 1942 | goto free_lock; |
| 1943 | } |
| 1944 | |
| 1945 | res = GSI_STATUS_SUCCESS; |
| 1946 | |
| 1947 | free_lock: |
| 1948 | mutex_unlock(&gsi_ctx->mlock); |
| 1949 | return res; |
| 1950 | } |
| 1951 | EXPORT_SYMBOL(gsi_stop_db_channel); |
| 1952 | |
| 1953 | int gsi_reset_channel(unsigned long chan_hdl) |
| 1954 | { |
| 1955 | enum gsi_ch_cmd_opcode op = GSI_CH_RESET; |
| 1956 | int res; |
| 1957 | uint32_t val; |
| 1958 | struct gsi_chan_ctx *ctx; |
| 1959 | bool reset_done = false; |
| 1960 | |
| 1961 | if (!gsi_ctx) { |
| 1962 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 1963 | return -GSI_STATUS_NODEV; |
| 1964 | } |
| 1965 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 1966 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1967 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 1968 | return -GSI_STATUS_INVALID_PARAMS; |
| 1969 | } |
| 1970 | |
| 1971 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 1972 | |
| 1973 | if (ctx->state != GSI_CHAN_STATE_STOPPED) { |
| 1974 | GSIERR("bad state %d\n", ctx->state); |
| 1975 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 1976 | } |
| 1977 | |
| 1978 | mutex_lock(&gsi_ctx->mlock); |
| 1979 | |
| 1980 | reset: |
| 1981 | init_completion(&ctx->compl); |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 1982 | gsi_ctx->ch_dbg[chan_hdl].ch_reset++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 1983 | val = (((chan_hdl << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 1984 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 1985 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 1986 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 1987 | gsi_writel(val, gsi_ctx->base + |
| 1988 | GSI_EE_n_GSI_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 1989 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 1990 | if (res == 0) { |
| 1991 | GSIERR("chan_hdl=%lu timed out\n", chan_hdl); |
| 1992 | mutex_unlock(&gsi_ctx->mlock); |
| 1993 | return -GSI_STATUS_TIMED_OUT; |
| 1994 | } |
| 1995 | |
| 1996 | if (ctx->state != GSI_CHAN_STATE_ALLOCATED) { |
| 1997 | GSIERR("chan_hdl=%lu unexpected state=%u\n", chan_hdl, |
| 1998 | ctx->state); |
| 1999 | BUG(); |
| 2000 | } |
| 2001 | |
| 2002 | /* workaround: reset GSI producers again */ |
| 2003 | if (ctx->props.dir == GSI_CHAN_DIR_FROM_GSI && !reset_done) { |
Skylar Chang | 1feb2a3 | 2016-10-17 10:01:36 -0700 | [diff] [blame] | 2004 | usleep_range(GSI_RESET_WA_MIN_SLEEP, GSI_RESET_WA_MAX_SLEEP); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2005 | reset_done = true; |
| 2006 | goto reset; |
| 2007 | } |
| 2008 | |
| 2009 | gsi_program_chan_ctx(&ctx->props, gsi_ctx->per.ee, |
| 2010 | ctx->evtr ? ctx->evtr->id : GSI_NO_EVT_ERINDEX); |
| 2011 | gsi_init_chan_ring(&ctx->props, &ctx->ring); |
| 2012 | |
| 2013 | /* restore scratch */ |
| 2014 | __gsi_write_channel_scratch(chan_hdl, ctx->scratch); |
| 2015 | |
| 2016 | mutex_unlock(&gsi_ctx->mlock); |
| 2017 | |
| 2018 | return GSI_STATUS_SUCCESS; |
| 2019 | } |
| 2020 | EXPORT_SYMBOL(gsi_reset_channel); |
| 2021 | |
| 2022 | int gsi_dealloc_channel(unsigned long chan_hdl) |
| 2023 | { |
| 2024 | enum gsi_ch_cmd_opcode op = GSI_CH_DE_ALLOC; |
| 2025 | int res; |
| 2026 | uint32_t val; |
| 2027 | struct gsi_chan_ctx *ctx; |
| 2028 | |
| 2029 | if (!gsi_ctx) { |
| 2030 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2031 | return -GSI_STATUS_NODEV; |
| 2032 | } |
| 2033 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2034 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2035 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 2036 | return -GSI_STATUS_INVALID_PARAMS; |
| 2037 | } |
| 2038 | |
| 2039 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2040 | |
| 2041 | if (ctx->state != GSI_CHAN_STATE_ALLOCATED) { |
| 2042 | GSIERR("bad state %d\n", ctx->state); |
| 2043 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2044 | } |
| 2045 | |
| 2046 | mutex_lock(&gsi_ctx->mlock); |
| 2047 | init_completion(&ctx->compl); |
| 2048 | |
Skylar Chang | 22ecb82 | 2016-10-21 10:15:04 -0700 | [diff] [blame] | 2049 | gsi_ctx->ch_dbg[chan_hdl].ch_de_alloc++; |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2050 | val = (((chan_hdl << GSI_EE_n_GSI_CH_CMD_CHID_SHFT) & |
| 2051 | GSI_EE_n_GSI_CH_CMD_CHID_BMSK) | |
| 2052 | ((op << GSI_EE_n_GSI_CH_CMD_OPCODE_SHFT) & |
| 2053 | GSI_EE_n_GSI_CH_CMD_OPCODE_BMSK)); |
| 2054 | gsi_writel(val, gsi_ctx->base + |
| 2055 | GSI_EE_n_GSI_CH_CMD_OFFS(gsi_ctx->per.ee)); |
| 2056 | res = wait_for_completion_timeout(&ctx->compl, GSI_CMD_TIMEOUT); |
| 2057 | if (res == 0) { |
| 2058 | GSIERR("chan_hdl=%lu timed out\n", chan_hdl); |
| 2059 | mutex_unlock(&gsi_ctx->mlock); |
| 2060 | return -GSI_STATUS_TIMED_OUT; |
| 2061 | } |
| 2062 | if (ctx->state != GSI_CHAN_STATE_NOT_ALLOCATED) { |
| 2063 | GSIERR("chan_hdl=%lu unexpected state=%u\n", chan_hdl, |
| 2064 | ctx->state); |
| 2065 | BUG(); |
| 2066 | } |
| 2067 | |
| 2068 | mutex_unlock(&gsi_ctx->mlock); |
| 2069 | |
| 2070 | devm_kfree(gsi_ctx->dev, ctx->user_data); |
| 2071 | ctx->allocated = false; |
| 2072 | if (ctx->evtr) |
| 2073 | atomic_dec(&ctx->evtr->chan_ref_cnt); |
| 2074 | atomic_dec(&gsi_ctx->num_chan); |
| 2075 | |
| 2076 | return GSI_STATUS_SUCCESS; |
| 2077 | } |
| 2078 | EXPORT_SYMBOL(gsi_dealloc_channel); |
| 2079 | |
| 2080 | void gsi_update_ch_dp_stats(struct gsi_chan_ctx *ctx, uint16_t used) |
| 2081 | { |
| 2082 | unsigned long now = jiffies_to_msecs(jiffies); |
| 2083 | unsigned long elapsed; |
| 2084 | |
| 2085 | if (used == 0) { |
| 2086 | elapsed = now - ctx->stats.dp.last_timestamp; |
| 2087 | if (ctx->stats.dp.empty_time < elapsed) |
| 2088 | ctx->stats.dp.empty_time = elapsed; |
| 2089 | } |
| 2090 | |
| 2091 | if (used <= ctx->props.max_re_expected / 3) |
| 2092 | ++ctx->stats.dp.ch_below_lo; |
| 2093 | else if (used <= 2 * ctx->props.max_re_expected / 3) |
| 2094 | ++ctx->stats.dp.ch_below_hi; |
| 2095 | else |
| 2096 | ++ctx->stats.dp.ch_above_hi; |
| 2097 | ctx->stats.dp.last_timestamp = now; |
| 2098 | } |
| 2099 | |
| 2100 | static void __gsi_query_channel_free_re(struct gsi_chan_ctx *ctx, |
| 2101 | uint16_t *num_free_re) |
| 2102 | { |
| 2103 | uint16_t start; |
| 2104 | uint16_t start_hw; |
| 2105 | uint16_t end; |
| 2106 | uint64_t rp; |
| 2107 | uint64_t rp_hw; |
| 2108 | int ee = gsi_ctx->per.ee; |
| 2109 | uint16_t used; |
| 2110 | uint16_t used_hw; |
| 2111 | |
| 2112 | rp_hw = gsi_readl(gsi_ctx->base + |
| 2113 | GSI_EE_n_GSI_CH_k_CNTXT_4_OFFS(ctx->props.ch_id, ee)); |
| 2114 | rp_hw |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2115 | GSI_EE_n_GSI_CH_k_CNTXT_5_OFFS(ctx->props.ch_id, ee))) |
| 2116 | << 32; |
| 2117 | |
| 2118 | if (!ctx->evtr) { |
| 2119 | rp = rp_hw; |
| 2120 | ctx->ring.rp = rp; |
| 2121 | } else { |
| 2122 | rp = ctx->ring.rp_local; |
| 2123 | } |
| 2124 | |
| 2125 | start = gsi_find_idx_from_addr(&ctx->ring, rp); |
| 2126 | start_hw = gsi_find_idx_from_addr(&ctx->ring, rp_hw); |
| 2127 | end = gsi_find_idx_from_addr(&ctx->ring, ctx->ring.wp_local); |
| 2128 | |
| 2129 | if (end >= start) |
| 2130 | used = end - start; |
| 2131 | else |
| 2132 | used = ctx->ring.max_num_elem + 1 - (start - end); |
| 2133 | |
| 2134 | if (end >= start_hw) |
| 2135 | used_hw = end - start_hw; |
| 2136 | else |
| 2137 | used_hw = ctx->ring.max_num_elem + 1 - (start_hw - end); |
| 2138 | |
| 2139 | *num_free_re = ctx->ring.max_num_elem - used; |
| 2140 | gsi_update_ch_dp_stats(ctx, used_hw); |
| 2141 | } |
| 2142 | |
| 2143 | int gsi_query_channel_info(unsigned long chan_hdl, |
| 2144 | struct gsi_chan_info *info) |
| 2145 | { |
| 2146 | struct gsi_chan_ctx *ctx; |
| 2147 | spinlock_t *slock; |
| 2148 | unsigned long flags; |
| 2149 | uint64_t rp; |
| 2150 | uint64_t wp; |
| 2151 | int ee = gsi_ctx->per.ee; |
| 2152 | |
| 2153 | if (!gsi_ctx) { |
| 2154 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2155 | return -GSI_STATUS_NODEV; |
| 2156 | } |
| 2157 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2158 | if (chan_hdl >= gsi_ctx->max_ch || !info) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2159 | GSIERR("bad params chan_hdl=%lu info=%p\n", chan_hdl, info); |
| 2160 | return -GSI_STATUS_INVALID_PARAMS; |
| 2161 | } |
| 2162 | |
| 2163 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2164 | if (ctx->evtr) { |
| 2165 | slock = &ctx->evtr->ring.slock; |
| 2166 | info->evt_valid = true; |
| 2167 | } else { |
| 2168 | slock = &ctx->ring.slock; |
| 2169 | info->evt_valid = false; |
| 2170 | } |
| 2171 | |
| 2172 | spin_lock_irqsave(slock, flags); |
| 2173 | |
| 2174 | rp = gsi_readl(gsi_ctx->base + |
| 2175 | GSI_EE_n_GSI_CH_k_CNTXT_4_OFFS(ctx->props.ch_id, ee)); |
| 2176 | rp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2177 | GSI_EE_n_GSI_CH_k_CNTXT_5_OFFS(ctx->props.ch_id, ee))) << 32; |
| 2178 | ctx->ring.rp = rp; |
| 2179 | info->rp = rp; |
| 2180 | |
| 2181 | wp = gsi_readl(gsi_ctx->base + |
| 2182 | GSI_EE_n_GSI_CH_k_CNTXT_6_OFFS(ctx->props.ch_id, ee)); |
| 2183 | wp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2184 | GSI_EE_n_GSI_CH_k_CNTXT_7_OFFS(ctx->props.ch_id, ee))) << 32; |
| 2185 | ctx->ring.wp = wp; |
| 2186 | info->wp = wp; |
| 2187 | |
| 2188 | if (info->evt_valid) { |
| 2189 | rp = gsi_readl(gsi_ctx->base + |
| 2190 | GSI_EE_n_EV_CH_k_CNTXT_4_OFFS(ctx->evtr->id, ee)); |
| 2191 | rp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2192 | GSI_EE_n_EV_CH_k_CNTXT_5_OFFS(ctx->evtr->id, ee))) |
| 2193 | << 32; |
| 2194 | info->evt_rp = rp; |
| 2195 | |
| 2196 | wp = gsi_readl(gsi_ctx->base + |
| 2197 | GSI_EE_n_EV_CH_k_CNTXT_6_OFFS(ctx->evtr->id, ee)); |
| 2198 | wp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2199 | GSI_EE_n_EV_CH_k_CNTXT_7_OFFS(ctx->evtr->id, ee))) |
| 2200 | << 32; |
| 2201 | info->evt_wp = wp; |
| 2202 | } |
| 2203 | |
| 2204 | spin_unlock_irqrestore(slock, flags); |
| 2205 | |
| 2206 | GSIDBG("ch=%lu RP=0x%llx WP=0x%llx ev_valid=%d ERP=0x%llx EWP=0x%llx\n", |
| 2207 | chan_hdl, info->rp, info->wp, |
| 2208 | info->evt_valid, info->evt_rp, info->evt_wp); |
| 2209 | |
| 2210 | return GSI_STATUS_SUCCESS; |
| 2211 | } |
| 2212 | EXPORT_SYMBOL(gsi_query_channel_info); |
| 2213 | |
| 2214 | int gsi_is_channel_empty(unsigned long chan_hdl, bool *is_empty) |
| 2215 | { |
| 2216 | struct gsi_chan_ctx *ctx; |
| 2217 | spinlock_t *slock; |
| 2218 | unsigned long flags; |
| 2219 | uint64_t rp; |
| 2220 | uint64_t wp; |
| 2221 | int ee = gsi_ctx->per.ee; |
| 2222 | |
| 2223 | if (!gsi_ctx) { |
| 2224 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2225 | return -GSI_STATUS_NODEV; |
| 2226 | } |
| 2227 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2228 | if (chan_hdl >= gsi_ctx->max_ch || !is_empty) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2229 | GSIERR("bad params chan_hdl=%lu is_empty=%p\n", |
| 2230 | chan_hdl, is_empty); |
| 2231 | return -GSI_STATUS_INVALID_PARAMS; |
| 2232 | } |
| 2233 | |
| 2234 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2235 | |
| 2236 | if (ctx->props.prot != GSI_CHAN_PROT_GPI) { |
| 2237 | GSIERR("op not supported for protocol %u\n", ctx->props.prot); |
| 2238 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2239 | } |
| 2240 | |
| 2241 | if (ctx->evtr) |
| 2242 | slock = &ctx->evtr->ring.slock; |
| 2243 | else |
| 2244 | slock = &ctx->ring.slock; |
| 2245 | |
| 2246 | spin_lock_irqsave(slock, flags); |
| 2247 | |
| 2248 | rp = gsi_readl(gsi_ctx->base + |
| 2249 | GSI_EE_n_GSI_CH_k_CNTXT_4_OFFS(ctx->props.ch_id, ee)); |
| 2250 | rp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2251 | GSI_EE_n_GSI_CH_k_CNTXT_5_OFFS(ctx->props.ch_id, ee))) << 32; |
| 2252 | ctx->ring.rp = rp; |
| 2253 | |
| 2254 | wp = gsi_readl(gsi_ctx->base + |
| 2255 | GSI_EE_n_GSI_CH_k_CNTXT_6_OFFS(ctx->props.ch_id, ee)); |
| 2256 | wp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2257 | GSI_EE_n_GSI_CH_k_CNTXT_7_OFFS(ctx->props.ch_id, ee))) << 32; |
| 2258 | ctx->ring.wp = wp; |
| 2259 | |
| 2260 | if (ctx->props.dir == GSI_CHAN_DIR_FROM_GSI) |
| 2261 | *is_empty = (ctx->ring.rp_local == rp) ? true : false; |
| 2262 | else |
| 2263 | *is_empty = (wp == rp) ? true : false; |
| 2264 | |
| 2265 | spin_unlock_irqrestore(slock, flags); |
| 2266 | |
| 2267 | GSIDBG("ch=%lu RP=0x%llx WP=0x%llx RP_LOCAL=0x%llx\n", |
| 2268 | chan_hdl, rp, wp, ctx->ring.rp_local); |
| 2269 | |
| 2270 | return GSI_STATUS_SUCCESS; |
| 2271 | } |
| 2272 | EXPORT_SYMBOL(gsi_is_channel_empty); |
| 2273 | |
| 2274 | int gsi_queue_xfer(unsigned long chan_hdl, uint16_t num_xfers, |
| 2275 | struct gsi_xfer_elem *xfer, bool ring_db) |
| 2276 | { |
| 2277 | struct gsi_chan_ctx *ctx; |
| 2278 | uint16_t free; |
| 2279 | struct gsi_tre tre; |
| 2280 | struct gsi_tre *tre_ptr; |
| 2281 | uint16_t idx; |
| 2282 | uint64_t wp_rollback; |
| 2283 | int i; |
| 2284 | spinlock_t *slock; |
| 2285 | unsigned long flags; |
| 2286 | |
| 2287 | if (!gsi_ctx) { |
| 2288 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2289 | return -GSI_STATUS_NODEV; |
| 2290 | } |
| 2291 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2292 | if (chan_hdl >= gsi_ctx->max_ch || !num_xfers || !xfer) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2293 | GSIERR("bad params chan_hdl=%lu num_xfers=%u xfer=%p\n", |
| 2294 | chan_hdl, num_xfers, xfer); |
| 2295 | return -GSI_STATUS_INVALID_PARAMS; |
| 2296 | } |
| 2297 | |
| 2298 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2299 | |
| 2300 | if (ctx->props.prot != GSI_CHAN_PROT_GPI) { |
| 2301 | GSIERR("op not supported for protocol %u\n", ctx->props.prot); |
| 2302 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2303 | } |
| 2304 | |
| 2305 | if (ctx->evtr) |
| 2306 | slock = &ctx->evtr->ring.slock; |
| 2307 | else |
| 2308 | slock = &ctx->ring.slock; |
| 2309 | |
| 2310 | spin_lock_irqsave(slock, flags); |
| 2311 | __gsi_query_channel_free_re(ctx, &free); |
| 2312 | |
| 2313 | if (num_xfers > free) { |
| 2314 | GSIERR("chan_hdl=%lu num_xfers=%u free=%u\n", |
| 2315 | chan_hdl, num_xfers, free); |
| 2316 | spin_unlock_irqrestore(slock, flags); |
| 2317 | return -GSI_STATUS_RING_INSUFFICIENT_SPACE; |
| 2318 | } |
| 2319 | |
| 2320 | wp_rollback = ctx->ring.wp_local; |
| 2321 | for (i = 0; i < num_xfers; i++) { |
| 2322 | memset(&tre, 0, sizeof(tre)); |
| 2323 | tre.buffer_ptr = xfer[i].addr; |
| 2324 | tre.buf_len = xfer[i].len; |
| 2325 | if (xfer[i].type == GSI_XFER_ELEM_DATA) { |
| 2326 | tre.re_type = GSI_RE_XFER; |
| 2327 | } else if (xfer[i].type == GSI_XFER_ELEM_IMME_CMD) { |
| 2328 | tre.re_type = GSI_RE_IMMD_CMD; |
| 2329 | } else { |
| 2330 | GSIERR("chan_hdl=%lu bad RE type=%u\n", chan_hdl, |
| 2331 | xfer[i].type); |
| 2332 | break; |
| 2333 | } |
| 2334 | tre.bei = (xfer[i].flags & GSI_XFER_FLAG_BEI) ? 1 : 0; |
| 2335 | tre.ieot = (xfer[i].flags & GSI_XFER_FLAG_EOT) ? 1 : 0; |
| 2336 | tre.ieob = (xfer[i].flags & GSI_XFER_FLAG_EOB) ? 1 : 0; |
| 2337 | tre.chain = (xfer[i].flags & GSI_XFER_FLAG_CHAIN) ? 1 : 0; |
| 2338 | |
| 2339 | idx = gsi_find_idx_from_addr(&ctx->ring, ctx->ring.wp_local); |
| 2340 | tre_ptr = (struct gsi_tre *)(ctx->ring.base_va + |
| 2341 | idx * ctx->ring.elem_sz); |
| 2342 | |
| 2343 | /* write the TRE to ring */ |
| 2344 | *tre_ptr = tre; |
| 2345 | ctx->user_data[idx] = xfer[i].xfer_user_data; |
| 2346 | gsi_incr_ring_wp(&ctx->ring); |
| 2347 | } |
| 2348 | |
| 2349 | if (i != num_xfers) { |
| 2350 | /* reject all the xfers */ |
| 2351 | ctx->ring.wp_local = wp_rollback; |
| 2352 | spin_unlock_irqrestore(slock, flags); |
| 2353 | return -GSI_STATUS_INVALID_PARAMS; |
| 2354 | } |
| 2355 | |
| 2356 | ctx->stats.queued += num_xfers; |
| 2357 | |
| 2358 | /* ensure TRE is set before ringing doorbell */ |
| 2359 | wmb(); |
| 2360 | |
| 2361 | if (ring_db) |
| 2362 | gsi_ring_chan_doorbell(ctx); |
| 2363 | |
| 2364 | spin_unlock_irqrestore(slock, flags); |
| 2365 | |
| 2366 | return GSI_STATUS_SUCCESS; |
| 2367 | } |
| 2368 | EXPORT_SYMBOL(gsi_queue_xfer); |
| 2369 | |
| 2370 | int gsi_start_xfer(unsigned long chan_hdl) |
| 2371 | { |
| 2372 | struct gsi_chan_ctx *ctx; |
| 2373 | |
| 2374 | if (!gsi_ctx) { |
| 2375 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2376 | return -GSI_STATUS_NODEV; |
| 2377 | } |
| 2378 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2379 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2380 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 2381 | return -GSI_STATUS_INVALID_PARAMS; |
| 2382 | } |
| 2383 | |
| 2384 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2385 | |
| 2386 | if (ctx->props.prot != GSI_CHAN_PROT_GPI) { |
| 2387 | GSIERR("op not supported for protocol %u\n", ctx->props.prot); |
| 2388 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2389 | } |
| 2390 | |
| 2391 | if (ctx->state != GSI_CHAN_STATE_STARTED) { |
| 2392 | GSIERR("bad state %d\n", ctx->state); |
| 2393 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2394 | } |
| 2395 | |
| 2396 | gsi_ring_chan_doorbell(ctx); |
| 2397 | |
| 2398 | return GSI_STATUS_SUCCESS; |
| 2399 | }; |
| 2400 | EXPORT_SYMBOL(gsi_start_xfer); |
| 2401 | |
| 2402 | int gsi_poll_channel(unsigned long chan_hdl, |
| 2403 | struct gsi_chan_xfer_notify *notify) |
| 2404 | { |
| 2405 | struct gsi_chan_ctx *ctx; |
| 2406 | uint64_t rp; |
| 2407 | int ee = gsi_ctx->per.ee; |
| 2408 | unsigned long flags; |
| 2409 | |
| 2410 | if (!gsi_ctx) { |
| 2411 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2412 | return -GSI_STATUS_NODEV; |
| 2413 | } |
| 2414 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2415 | if (chan_hdl >= gsi_ctx->max_ch || !notify) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2416 | GSIERR("bad params chan_hdl=%lu notify=%p\n", chan_hdl, notify); |
| 2417 | return -GSI_STATUS_INVALID_PARAMS; |
| 2418 | } |
| 2419 | |
| 2420 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2421 | |
| 2422 | if (ctx->props.prot != GSI_CHAN_PROT_GPI) { |
| 2423 | GSIERR("op not supported for protocol %u\n", ctx->props.prot); |
| 2424 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2425 | } |
| 2426 | |
| 2427 | if (!ctx->evtr) { |
| 2428 | GSIERR("no event ring associated chan_hdl=%lu\n", chan_hdl); |
| 2429 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2430 | } |
| 2431 | |
| 2432 | spin_lock_irqsave(&ctx->evtr->ring.slock, flags); |
| 2433 | rp = gsi_readl(gsi_ctx->base + |
| 2434 | GSI_EE_n_EV_CH_k_CNTXT_4_OFFS(ctx->evtr->id, ee)); |
| 2435 | rp |= ((uint64_t)gsi_readl(gsi_ctx->base + |
| 2436 | GSI_EE_n_EV_CH_k_CNTXT_5_OFFS(ctx->evtr->id, ee))) << 32; |
| 2437 | ctx->evtr->ring.rp = rp; |
| 2438 | if (rp == ctx->evtr->ring.rp_local) { |
| 2439 | spin_unlock_irqrestore(&ctx->evtr->ring.slock, flags); |
| 2440 | ctx->stats.poll_empty++; |
| 2441 | return GSI_STATUS_POLL_EMPTY; |
| 2442 | } |
| 2443 | |
| 2444 | gsi_process_evt_re(ctx->evtr, notify, false); |
| 2445 | gsi_ring_evt_doorbell(ctx->evtr); |
| 2446 | spin_unlock_irqrestore(&ctx->evtr->ring.slock, flags); |
| 2447 | ctx->stats.poll_ok++; |
| 2448 | |
| 2449 | return GSI_STATUS_SUCCESS; |
| 2450 | } |
| 2451 | EXPORT_SYMBOL(gsi_poll_channel); |
| 2452 | |
| 2453 | int gsi_config_channel_mode(unsigned long chan_hdl, enum gsi_chan_mode mode) |
| 2454 | { |
| 2455 | struct gsi_chan_ctx *ctx; |
| 2456 | enum gsi_chan_mode curr; |
| 2457 | unsigned long flags; |
| 2458 | |
| 2459 | if (!gsi_ctx) { |
| 2460 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2461 | return -GSI_STATUS_NODEV; |
| 2462 | } |
| 2463 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2464 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2465 | GSIERR("bad params chan_hdl=%lu mode=%u\n", chan_hdl, mode); |
| 2466 | return -GSI_STATUS_INVALID_PARAMS; |
| 2467 | } |
| 2468 | |
| 2469 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2470 | |
| 2471 | if (ctx->props.prot != GSI_CHAN_PROT_GPI) { |
| 2472 | GSIERR("op not supported for protocol %u\n", ctx->props.prot); |
| 2473 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2474 | } |
| 2475 | |
| 2476 | if (!ctx->evtr || !ctx->evtr->props.exclusive) { |
| 2477 | GSIERR("cannot configure mode on chan_hdl=%lu\n", |
| 2478 | chan_hdl); |
| 2479 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2480 | } |
| 2481 | |
| 2482 | if (atomic_read(&ctx->poll_mode)) |
| 2483 | curr = GSI_CHAN_MODE_POLL; |
| 2484 | else |
| 2485 | curr = GSI_CHAN_MODE_CALLBACK; |
| 2486 | |
| 2487 | if (mode == curr) { |
| 2488 | GSIERR("already in requested mode %u chan_hdl=%lu\n", |
| 2489 | curr, chan_hdl); |
| 2490 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2491 | } |
| 2492 | |
| 2493 | spin_lock_irqsave(&gsi_ctx->slock, flags); |
| 2494 | if (curr == GSI_CHAN_MODE_CALLBACK && |
| 2495 | mode == GSI_CHAN_MODE_POLL) { |
| 2496 | __gsi_config_ieob_irq(gsi_ctx->per.ee, 1 << ctx->evtr->id, 0); |
| 2497 | ctx->stats.callback_to_poll++; |
| 2498 | } |
| 2499 | |
| 2500 | if (curr == GSI_CHAN_MODE_POLL && |
| 2501 | mode == GSI_CHAN_MODE_CALLBACK) { |
| 2502 | __gsi_config_ieob_irq(gsi_ctx->per.ee, 1 << ctx->evtr->id, ~0); |
| 2503 | ctx->stats.poll_to_callback++; |
| 2504 | } |
| 2505 | atomic_set(&ctx->poll_mode, mode); |
| 2506 | spin_unlock_irqrestore(&gsi_ctx->slock, flags); |
| 2507 | |
| 2508 | return GSI_STATUS_SUCCESS; |
| 2509 | } |
| 2510 | EXPORT_SYMBOL(gsi_config_channel_mode); |
| 2511 | |
| 2512 | int gsi_get_channel_cfg(unsigned long chan_hdl, struct gsi_chan_props *props, |
| 2513 | union gsi_channel_scratch *scr) |
| 2514 | { |
| 2515 | struct gsi_chan_ctx *ctx; |
| 2516 | |
| 2517 | if (!gsi_ctx) { |
| 2518 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2519 | return -GSI_STATUS_NODEV; |
| 2520 | } |
| 2521 | |
| 2522 | if (!props || !scr) { |
| 2523 | GSIERR("bad params props=%p scr=%p\n", props, scr); |
| 2524 | return -GSI_STATUS_INVALID_PARAMS; |
| 2525 | } |
| 2526 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2527 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2528 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 2529 | return -GSI_STATUS_INVALID_PARAMS; |
| 2530 | } |
| 2531 | |
| 2532 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2533 | |
| 2534 | if (ctx->state == GSI_CHAN_STATE_NOT_ALLOCATED) { |
| 2535 | GSIERR("bad state %d\n", ctx->state); |
| 2536 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2537 | } |
| 2538 | |
| 2539 | mutex_lock(&ctx->mlock); |
| 2540 | *props = ctx->props; |
| 2541 | *scr = ctx->scratch; |
| 2542 | mutex_unlock(&ctx->mlock); |
| 2543 | |
| 2544 | return GSI_STATUS_SUCCESS; |
| 2545 | } |
| 2546 | EXPORT_SYMBOL(gsi_get_channel_cfg); |
| 2547 | |
| 2548 | int gsi_set_channel_cfg(unsigned long chan_hdl, struct gsi_chan_props *props, |
| 2549 | union gsi_channel_scratch *scr) |
| 2550 | { |
| 2551 | struct gsi_chan_ctx *ctx; |
| 2552 | |
| 2553 | if (!gsi_ctx) { |
| 2554 | pr_err("%s:%d gsi context not allocated\n", __func__, __LINE__); |
| 2555 | return -GSI_STATUS_NODEV; |
| 2556 | } |
| 2557 | |
| 2558 | if (!props || gsi_validate_channel_props(props)) { |
| 2559 | GSIERR("bad params props=%p\n", props); |
| 2560 | return -GSI_STATUS_INVALID_PARAMS; |
| 2561 | } |
| 2562 | |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2563 | if (chan_hdl >= gsi_ctx->max_ch) { |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2564 | GSIERR("bad params chan_hdl=%lu\n", chan_hdl); |
| 2565 | return -GSI_STATUS_INVALID_PARAMS; |
| 2566 | } |
| 2567 | |
| 2568 | ctx = &gsi_ctx->chan[chan_hdl]; |
| 2569 | |
| 2570 | if (ctx->state != GSI_CHAN_STATE_ALLOCATED) { |
| 2571 | GSIERR("bad state %d\n", ctx->state); |
| 2572 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2573 | } |
| 2574 | |
| 2575 | if (ctx->props.ch_id != props->ch_id || |
| 2576 | ctx->props.evt_ring_hdl != props->evt_ring_hdl) { |
| 2577 | GSIERR("changing immutable fields not supported\n"); |
| 2578 | return -GSI_STATUS_UNSUPPORTED_OP; |
| 2579 | } |
| 2580 | |
| 2581 | mutex_lock(&ctx->mlock); |
| 2582 | ctx->props = *props; |
| 2583 | if (scr) |
| 2584 | ctx->scratch = *scr; |
| 2585 | gsi_program_chan_ctx(&ctx->props, gsi_ctx->per.ee, |
| 2586 | ctx->evtr ? ctx->evtr->id : GSI_NO_EVT_ERINDEX); |
| 2587 | gsi_init_chan_ring(&ctx->props, &ctx->ring); |
| 2588 | |
| 2589 | /* restore scratch */ |
| 2590 | __gsi_write_channel_scratch(chan_hdl, ctx->scratch); |
| 2591 | mutex_unlock(&ctx->mlock); |
| 2592 | |
| 2593 | return GSI_STATUS_SUCCESS; |
| 2594 | } |
| 2595 | EXPORT_SYMBOL(gsi_set_channel_cfg); |
| 2596 | |
| 2597 | static void gsi_configure_ieps(void *base) |
| 2598 | { |
| 2599 | void __iomem *gsi_base = (void __iomem *)base; |
| 2600 | |
| 2601 | gsi_writel(1, gsi_base + GSI_GSI_IRAM_PTR_CH_CMD_OFFS); |
| 2602 | gsi_writel(2, gsi_base + GSI_GSI_IRAM_PTR_CH_DB_OFFS); |
| 2603 | gsi_writel(3, gsi_base + GSI_GSI_IRAM_PTR_CH_DIS_COMP_OFFS); |
| 2604 | gsi_writel(4, gsi_base + GSI_GSI_IRAM_PTR_CH_EMPTY_OFFS); |
| 2605 | gsi_writel(5, gsi_base + GSI_GSI_IRAM_PTR_EE_GENERIC_CMD_OFFS); |
| 2606 | gsi_writel(6, gsi_base + GSI_GSI_IRAM_PTR_EVENT_GEN_COMP_OFFS); |
| 2607 | gsi_writel(7, gsi_base + GSI_GSI_IRAM_PTR_INT_MOD_STOPED_OFFS); |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2608 | gsi_writel(8, gsi_base + GSI_GSI_IRAM_PTR_PERIPH_IF_TLV_IN_0_OFFS); |
| 2609 | gsi_writel(9, gsi_base + GSI_GSI_IRAM_PTR_PERIPH_IF_TLV_IN_2_OFFS); |
| 2610 | gsi_writel(10, gsi_base + GSI_GSI_IRAM_PTR_PERIPH_IF_TLV_IN_1_OFFS); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2611 | gsi_writel(11, gsi_base + GSI_GSI_IRAM_PTR_NEW_RE_OFFS); |
| 2612 | gsi_writel(12, gsi_base + GSI_GSI_IRAM_PTR_READ_ENG_COMP_OFFS); |
| 2613 | gsi_writel(13, gsi_base + GSI_GSI_IRAM_PTR_TIMER_EXPIRED_OFFS); |
| 2614 | } |
| 2615 | |
| 2616 | static void gsi_configure_bck_prs_matrix(void *base) |
| 2617 | { |
| 2618 | void __iomem *gsi_base = (void __iomem *)base; |
| 2619 | /* |
| 2620 | * For now, these are default values. In the future, GSI FW image will |
| 2621 | * produce optimized back-pressure values based on the FW image. |
| 2622 | */ |
| 2623 | gsi_writel(0xfffffffe, |
| 2624 | gsi_base + GSI_IC_DISABLE_CHNL_BCK_PRS_LSB_OFFS); |
| 2625 | gsi_writel(0xffffffff, |
| 2626 | gsi_base + GSI_IC_DISABLE_CHNL_BCK_PRS_MSB_OFFS); |
| 2627 | gsi_writel(0xffffffbf, gsi_base + GSI_IC_GEN_EVNT_BCK_PRS_LSB_OFFS); |
| 2628 | gsi_writel(0xffffffff, gsi_base + GSI_IC_GEN_EVNT_BCK_PRS_MSB_OFFS); |
| 2629 | gsi_writel(0xffffefff, gsi_base + GSI_IC_GEN_INT_BCK_PRS_LSB_OFFS); |
| 2630 | gsi_writel(0xffffffff, gsi_base + GSI_IC_GEN_INT_BCK_PRS_MSB_OFFS); |
| 2631 | gsi_writel(0xffffefff, |
| 2632 | gsi_base + GSI_IC_STOP_INT_MOD_BCK_PRS_LSB_OFFS); |
| 2633 | gsi_writel(0xffffffff, |
| 2634 | gsi_base + GSI_IC_STOP_INT_MOD_BCK_PRS_MSB_OFFS); |
| 2635 | gsi_writel(0x00000000, |
| 2636 | gsi_base + GSI_IC_PROCESS_DESC_BCK_PRS_LSB_OFFS); |
| 2637 | gsi_writel(0x00000000, |
| 2638 | gsi_base + GSI_IC_PROCESS_DESC_BCK_PRS_MSB_OFFS); |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2639 | gsi_writel(0xf9ffffff, gsi_base + GSI_IC_TLV_STOP_BCK_PRS_LSB_OFFS); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2640 | gsi_writel(0xffffffff, gsi_base + GSI_IC_TLV_STOP_BCK_PRS_MSB_OFFS); |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2641 | gsi_writel(0xf9ffffff, gsi_base + GSI_IC_TLV_RESET_BCK_PRS_LSB_OFFS); |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2642 | gsi_writel(0xffffffff, gsi_base + GSI_IC_TLV_RESET_BCK_PRS_MSB_OFFS); |
| 2643 | gsi_writel(0xffffffff, gsi_base + GSI_IC_RGSTR_TIMER_BCK_PRS_LSB_OFFS); |
| 2644 | gsi_writel(0xfffffffe, gsi_base + GSI_IC_RGSTR_TIMER_BCK_PRS_MSB_OFFS); |
| 2645 | gsi_writel(0xffffffff, gsi_base + GSI_IC_READ_BCK_PRS_LSB_OFFS); |
| 2646 | gsi_writel(0xffffefff, gsi_base + GSI_IC_READ_BCK_PRS_MSB_OFFS); |
| 2647 | gsi_writel(0xffffffff, gsi_base + GSI_IC_WRITE_BCK_PRS_LSB_OFFS); |
| 2648 | gsi_writel(0xffffdfff, gsi_base + GSI_IC_WRITE_BCK_PRS_MSB_OFFS); |
| 2649 | gsi_writel(0xffffffff, |
| 2650 | gsi_base + GSI_IC_UCONTROLLER_GPR_BCK_PRS_LSB_OFFS); |
| 2651 | gsi_writel(0xff03ffff, |
| 2652 | gsi_base + GSI_IC_UCONTROLLER_GPR_BCK_PRS_MSB_OFFS); |
| 2653 | } |
| 2654 | |
| 2655 | int gsi_configure_regs(phys_addr_t gsi_base_addr, u32 gsi_size, |
| 2656 | phys_addr_t per_base_addr) |
| 2657 | { |
| 2658 | void __iomem *gsi_base; |
| 2659 | |
| 2660 | gsi_base = ioremap_nocache(gsi_base_addr, gsi_size); |
| 2661 | if (!gsi_base) { |
| 2662 | GSIERR("ioremap failed for 0x%pa\n", &gsi_base_addr); |
| 2663 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 2664 | } |
| 2665 | gsi_writel(0, gsi_base + GSI_GSI_PERIPH_BASE_ADDR_MSB_OFFS); |
| 2666 | gsi_writel(per_base_addr, |
| 2667 | gsi_base + GSI_GSI_PERIPH_BASE_ADDR_LSB_OFFS); |
| 2668 | gsi_configure_bck_prs_matrix((void *)gsi_base); |
| 2669 | gsi_configure_ieps((void *)gsi_base); |
| 2670 | iounmap(gsi_base); |
| 2671 | |
| 2672 | return 0; |
| 2673 | } |
| 2674 | EXPORT_SYMBOL(gsi_configure_regs); |
| 2675 | |
| 2676 | int gsi_enable_fw(phys_addr_t gsi_base_addr, u32 gsi_size) |
| 2677 | { |
| 2678 | void __iomem *gsi_base; |
| 2679 | uint32_t value; |
| 2680 | |
| 2681 | gsi_base = ioremap_nocache(gsi_base_addr, gsi_size); |
| 2682 | if (!gsi_base) { |
| 2683 | GSIERR("ioremap failed for 0x%pa\n", &gsi_base_addr); |
| 2684 | return -GSI_STATUS_RES_ALLOC_FAILURE; |
| 2685 | } |
| 2686 | |
| 2687 | /* Enable the MCS and set to x2 clocks */ |
Amir Levy | 4164424 | 2016-11-03 15:38:09 +0200 | [diff] [blame] | 2688 | if (gsi_ctx->per.ver >= GSI_VER_1_2) { |
| 2689 | value = ((1 << GSI_GSI_MCS_CFG_MCS_ENABLE_SHFT) & |
| 2690 | GSI_GSI_MCS_CFG_MCS_ENABLE_BMSK); |
| 2691 | gsi_writel(value, gsi_base + GSI_GSI_MCS_CFG_OFFS); |
| 2692 | |
| 2693 | value = (((1 << GSI_GSI_CFG_GSI_ENABLE_SHFT) & |
| 2694 | GSI_GSI_CFG_GSI_ENABLE_BMSK) | |
| 2695 | ((0 << GSI_GSI_CFG_MCS_ENABLE_SHFT) & |
| 2696 | GSI_GSI_CFG_MCS_ENABLE_BMSK) | |
| 2697 | ((1 << GSI_GSI_CFG_DOUBLE_MCS_CLK_FREQ_SHFT) & |
| 2698 | GSI_GSI_CFG_DOUBLE_MCS_CLK_FREQ_BMSK) | |
| 2699 | ((0 << GSI_GSI_CFG_UC_IS_MCS_SHFT) & |
| 2700 | GSI_GSI_CFG_UC_IS_MCS_BMSK) | |
| 2701 | ((0 << GSI_GSI_CFG_GSI_PWR_CLPS_SHFT) & |
| 2702 | GSI_GSI_CFG_GSI_PWR_CLPS_BMSK) | |
| 2703 | ((0 << GSI_GSI_CFG_BP_MTRIX_DISABLE_SHFT) & |
| 2704 | GSI_GSI_CFG_BP_MTRIX_DISABLE_BMSK)); |
| 2705 | gsi_writel(value, gsi_base + GSI_GSI_CFG_OFFS); |
| 2706 | } else { |
| 2707 | value = (((1 << GSI_GSI_CFG_GSI_ENABLE_SHFT) & |
| 2708 | GSI_GSI_CFG_GSI_ENABLE_BMSK) | |
| 2709 | ((1 << GSI_GSI_CFG_MCS_ENABLE_SHFT) & |
| 2710 | GSI_GSI_CFG_MCS_ENABLE_BMSK) | |
| 2711 | ((1 << GSI_GSI_CFG_DOUBLE_MCS_CLK_FREQ_SHFT) & |
| 2712 | GSI_GSI_CFG_DOUBLE_MCS_CLK_FREQ_BMSK) | |
| 2713 | ((0 << GSI_GSI_CFG_UC_IS_MCS_SHFT) & |
| 2714 | GSI_GSI_CFG_UC_IS_MCS_BMSK)); |
| 2715 | gsi_writel(value, gsi_base + GSI_GSI_CFG_OFFS); |
| 2716 | } |
Amir Levy | cdccd63 | 2016-10-30 09:36:41 +0200 | [diff] [blame] | 2717 | |
| 2718 | iounmap(gsi_base); |
| 2719 | |
| 2720 | return 0; |
| 2721 | |
| 2722 | } |
| 2723 | EXPORT_SYMBOL(gsi_enable_fw); |
| 2724 | |
| 2725 | static int msm_gsi_probe(struct platform_device *pdev) |
| 2726 | { |
| 2727 | struct device *dev = &pdev->dev; |
| 2728 | |
| 2729 | pr_debug("gsi_probe\n"); |
| 2730 | gsi_ctx = devm_kzalloc(dev, sizeof(*gsi_ctx), GFP_KERNEL); |
| 2731 | if (!gsi_ctx) { |
| 2732 | dev_err(dev, "failed to allocated gsi context\n"); |
| 2733 | return -ENOMEM; |
| 2734 | } |
| 2735 | |
| 2736 | gsi_ctx->dev = dev; |
| 2737 | gsi_debugfs_init(); |
| 2738 | |
| 2739 | return 0; |
| 2740 | } |
| 2741 | |
| 2742 | static struct platform_driver msm_gsi_driver = { |
| 2743 | .probe = msm_gsi_probe, |
| 2744 | .driver = { |
| 2745 | .owner = THIS_MODULE, |
| 2746 | .name = "gsi", |
| 2747 | .of_match_table = msm_gsi_match, |
| 2748 | }, |
| 2749 | }; |
| 2750 | |
| 2751 | /** |
| 2752 | * Module Init. |
| 2753 | */ |
| 2754 | static int __init gsi_init(void) |
| 2755 | { |
| 2756 | pr_debug("gsi_init\n"); |
| 2757 | return platform_driver_register(&msm_gsi_driver); |
| 2758 | } |
| 2759 | |
| 2760 | arch_initcall(gsi_init); |
| 2761 | |
| 2762 | MODULE_LICENSE("GPL v2"); |
| 2763 | MODULE_DESCRIPTION("Generic Software Interface (GSI)"); |