Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. 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/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/clk.h> |
| 19 | #include <linux/radix-tree.h> |
| 20 | #include <mach/clk.h> |
| 21 | #include <mach/board.h> |
| 22 | #include <mach/rpm.h> |
| 23 | #include "msm_bus_core.h" |
| 24 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 25 | enum { |
| 26 | SLAVE_NODE, |
| 27 | MASTER_NODE, |
| 28 | }; |
| 29 | |
| 30 | enum { |
| 31 | DISABLE, |
| 32 | ENABLE, |
| 33 | }; |
| 34 | |
| 35 | struct msm_bus_fabric { |
| 36 | struct msm_bus_fabric_device fabdev; |
| 37 | int ahb; |
| 38 | void *cdata[NUM_CTX]; |
| 39 | bool arb_dirty; |
| 40 | bool clk_dirty; |
| 41 | struct radix_tree_root fab_tree; |
| 42 | int num_nodes; |
| 43 | struct list_head gateways; |
| 44 | struct msm_bus_inode_info info; |
| 45 | const struct msm_bus_fab_algorithm *algo; |
| 46 | struct msm_bus_fabric_registration *pdata; |
| 47 | struct msm_rpm_iv_pair *rpm_data; |
| 48 | }; |
| 49 | #define to_msm_bus_fabric(d) container_of(d, \ |
| 50 | struct msm_bus_fabric, d) |
| 51 | |
| 52 | /** |
| 53 | * msm_bus_fabric_add_node() - Add a node to the fabric structure |
| 54 | * @fabric: Fabric device to which the node should be added |
| 55 | * @info: The node to be added |
| 56 | */ |
| 57 | static int msm_bus_fabric_add_node(struct msm_bus_fabric *fabric, |
| 58 | struct msm_bus_inode_info *info) |
| 59 | { |
| 60 | int status = -ENOMEM; |
| 61 | MSM_FAB_DBG("msm_bus_fabric_add_node: ID %d Gw: %d\n", |
| 62 | info->node_info->priv_id, info->node_info->gateway); |
| 63 | status = radix_tree_preload(GFP_ATOMIC); |
| 64 | if (status) |
| 65 | goto out; |
| 66 | status = radix_tree_insert(&fabric->fab_tree, info->node_info->priv_id, |
| 67 | info); |
| 68 | if (IS_SLAVE(info->node_info->priv_id)) |
| 69 | radix_tree_tag_set(&fabric->fab_tree, info->node_info->priv_id, |
| 70 | SLAVE_NODE); |
| 71 | |
| 72 | if (info->node_info->slaveclk[DUAL_CTX]) { |
| 73 | info->nodeclk[DUAL_CTX].clk = clk_get(NULL, |
| 74 | info->node_info->slaveclk[DUAL_CTX]); |
| 75 | if (IS_ERR(info->nodeclk[DUAL_CTX].clk)) { |
| 76 | MSM_BUS_ERR("Could not get clock for %s\n", |
| 77 | info->node_info->slaveclk[DUAL_CTX]); |
| 78 | status = -EINVAL; |
| 79 | goto out; |
| 80 | } |
| 81 | info->nodeclk[DUAL_CTX].enable = false; |
| 82 | info->nodeclk[DUAL_CTX].dirty = false; |
| 83 | } |
| 84 | radix_tree_preload_end(); |
| 85 | out: |
| 86 | return status; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * msm_bus_add_fab() - Add a fabric (gateway) to the current fabric |
| 91 | * @fabric: Fabric device to which the gateway info should be added |
| 92 | * @info: Gateway node to be added to the fabric |
| 93 | */ |
| 94 | static int msm_bus_fabric_add_fab(struct msm_bus_fabric *fabric, |
| 95 | struct msm_bus_inode_info *info) |
| 96 | { |
| 97 | int status = 0; |
| 98 | struct msm_bus_fabnodeinfo *fabnodeinfo; |
| 99 | MSM_FAB_DBG("msm_bus_fabric_add_fab: ID %d Gw: %d\n", |
| 100 | info->node_info->priv_id, info->node_info->gateway); |
| 101 | fabnodeinfo = kzalloc(sizeof(struct msm_bus_fabnodeinfo), GFP_KERNEL); |
| 102 | if (!fabnodeinfo) { |
| 103 | MSM_FAB_ERR("msm_bus_fabric_add_fab: " |
| 104 | "No Node Info\n"); |
| 105 | MSM_FAB_ERR("axi: Cannot register fabric!\n"); |
| 106 | status = -ENOMEM; |
| 107 | } |
| 108 | |
| 109 | fabnodeinfo->info = info; |
| 110 | fabnodeinfo->info->num_pnodes = -1; |
| 111 | list_add_tail(&fabnodeinfo->list, &fabric->gateways); |
| 112 | return status; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * register_fabric_info() - Create the internal fabric structure and |
| 117 | * build the topology tree from platform specific data |
| 118 | * |
| 119 | * @fabric: Fabric to which the gateways, nodes should be added |
| 120 | * |
| 121 | * This function is called from probe. Iterates over the platform data, |
| 122 | * and builds the topology |
| 123 | */ |
| 124 | static int register_fabric_info(struct msm_bus_fabric *fabric) |
| 125 | { |
| 126 | int i, ret = 0, err = 0; |
| 127 | |
| 128 | MSM_FAB_DBG("id:%d pdata-id: %d len: %d\n", fabric->fabdev.id, |
| 129 | fabric->pdata->id, fabric->pdata->len); |
| 130 | |
| 131 | for (i = 0; i < fabric->pdata->len; i++) { |
| 132 | struct msm_bus_inode_info *info; |
| 133 | int ctx; |
| 134 | |
| 135 | info = kzalloc(sizeof(struct msm_bus_inode_info), GFP_KERNEL); |
| 136 | info->node_info = fabric->pdata->info + i; |
| 137 | info->commit_index = -1; |
| 138 | info->num_pnodes = -1; |
| 139 | |
| 140 | for (ctx = 0; ctx < NUM_CTX; ctx++) { |
| 141 | if (info->node_info->slaveclk[ctx]) { |
| 142 | info->nodeclk[ctx].clk = clk_get(NULL, |
| 143 | info->node_info->slaveclk[ctx]); |
| 144 | if (IS_ERR(info->nodeclk[ctx].clk)) { |
| 145 | MSM_BUS_ERR("Couldn't get clk %s\n", |
| 146 | info->node_info->slaveclk[ctx]); |
| 147 | err = -EINVAL; |
| 148 | } |
| 149 | info->nodeclk[ctx].enable = false; |
| 150 | info->nodeclk[ctx].dirty = false; |
| 151 | } |
| 152 | } |
| 153 | if (info->node_info->memclk) { |
| 154 | info->memclk.clk = clk_get(NULL, |
| 155 | info->node_info->memclk); |
| 156 | if (IS_ERR(info->memclk.clk)) { |
| 157 | MSM_BUS_ERR("Couldn't get clk %s\n", |
| 158 | info->node_info->memclk); |
| 159 | err = -EINVAL; |
| 160 | } |
| 161 | info->memclk.enable = false; |
| 162 | info->memclk.dirty = false; |
| 163 | } |
| 164 | |
| 165 | ret = info->node_info->gateway ? |
| 166 | msm_bus_fabric_add_fab(fabric, info) : |
| 167 | msm_bus_fabric_add_node(fabric, info); |
| 168 | if (ret) { |
| 169 | MSM_BUS_ERR("Unable to add node info, ret: %d\n", ret); |
| 170 | kfree(info); |
| 171 | goto error; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | fabric->rpm_data = allocate_rpm_data(fabric->pdata); |
| 176 | |
| 177 | MSM_FAB_DBG("Fabric: %d nmasters: %d nslaves: %d\n" |
| 178 | " ntieredslaves: %d, rpm_enabled: %d\n", |
| 179 | fabric->fabdev.id, fabric->pdata->nmasters, |
| 180 | fabric->pdata->nslaves, fabric->pdata->ntieredslaves, |
| 181 | fabric->pdata->rpm_enabled); |
| 182 | MSM_FAB_DBG("msm_bus_register_fabric_info i: %d\n", i); |
| 183 | fabric->num_nodes = fabric->pdata->len; |
| 184 | error: |
| 185 | fabric->num_nodes = i; |
| 186 | msm_bus_dbg_commit_data(fabric->fabdev.name, NULL, 0, 0, 0, |
| 187 | MSM_BUS_DBG_REGISTER); |
| 188 | return ret | err; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * msm_bus_fabric_update_clks() - Set the clocks for fabrics and slaves |
| 193 | * @fabric: Fabric for which the clocks need to be updated |
| 194 | * @slave: The node for which the clocks need to be updated |
| 195 | * @index: The index for which the current clocks are set |
| 196 | * @curr_clk_hz:Current clock value |
| 197 | * @req_clk_hz: Requested clock value |
| 198 | * @bwsum: Bandwidth Sum |
| 199 | * @clk_flag: Flag determining whether fabric clock or the slave clock has to |
| 200 | * be set. If clk_flag is set, fabric clock is set, else slave clock is set. |
| 201 | */ |
| 202 | static int msm_bus_fabric_update_clks(struct msm_bus_fabric_device *fabdev, |
| 203 | struct msm_bus_inode_info *slave, int index, |
| 204 | unsigned long curr_clk_hz, unsigned long req_clk_hz, |
| 205 | unsigned long bwsum_hz, int clk_flag, int ctx, |
| 206 | unsigned int cl_active_flag) |
| 207 | { |
| 208 | int i, status = 0; |
| 209 | unsigned long max_pclk = 0, rate; |
| 210 | unsigned long *pclk = NULL; |
| 211 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 212 | struct nodeclk *nodeclk; |
| 213 | |
| 214 | /* Maximum for this gateway */ |
| 215 | for (i = 0; i <= slave->num_pnodes; i++) { |
| 216 | if (i == index && (req_clk_hz < curr_clk_hz)) |
| 217 | continue; |
| 218 | slave->pnode[i].sel_clk = &slave->pnode[i].clk[ctx]; |
| 219 | max_pclk = max(max_pclk, *slave->pnode[i].sel_clk); |
| 220 | } |
| 221 | |
| 222 | *slave->link_info.sel_clk = |
| 223 | max(max_pclk, max(bwsum_hz, req_clk_hz)); |
| 224 | /* Is this gateway or slave? */ |
| 225 | if (clk_flag && (!fabric->ahb)) { |
| 226 | struct msm_bus_fabnodeinfo *fabgw = NULL; |
| 227 | struct msm_bus_inode_info *info = NULL; |
| 228 | /* Maximum of all gateways set at fabric */ |
| 229 | list_for_each_entry(fabgw, &fabric->gateways, list) { |
| 230 | info = fabgw->info; |
| 231 | if (!info) |
| 232 | continue; |
| 233 | info->link_info.sel_clk = &info->link_info.clk[ctx]; |
| 234 | max_pclk = max(max_pclk, *info->link_info.sel_clk); |
| 235 | } |
| 236 | MSM_FAB_DBG("max_pclk from gateways: %lu\n", max_pclk); |
| 237 | |
| 238 | /* Maximum of all slave clocks. */ |
| 239 | |
| 240 | for (i = 0; i < fabric->pdata->len; i++) { |
| 241 | if (fabric->pdata->info[i].gateway || |
| 242 | (fabric->pdata->info[i].id < SLAVE_ID_KEY)) |
| 243 | continue; |
| 244 | info = radix_tree_lookup(&fabric->fab_tree, |
| 245 | fabric->pdata->info[i].priv_id); |
| 246 | if (!info) |
| 247 | continue; |
| 248 | info->link_info.sel_clk = &info->link_info.clk[ctx]; |
| 249 | max_pclk = max(max_pclk, *info->link_info.sel_clk); |
| 250 | } |
| 251 | |
| 252 | |
| 253 | MSM_FAB_DBG("max_pclk from slaves & gws: %lu\n", max_pclk); |
| 254 | fabric->info.link_info.sel_clk = |
| 255 | &fabric->info.link_info.clk[ctx]; |
| 256 | pclk = fabric->info.link_info.sel_clk; |
| 257 | } else { |
| 258 | slave->link_info.sel_clk = &slave->link_info.clk[ctx]; |
| 259 | pclk = slave->link_info.sel_clk; |
| 260 | } |
| 261 | |
| 262 | |
| 263 | *pclk = max(max_pclk, max(bwsum_hz, req_clk_hz)); |
| 264 | |
| 265 | if (!fabric->pdata->rpm_enabled) |
| 266 | goto skip_set_clks; |
| 267 | |
| 268 | if (clk_flag) { |
| 269 | nodeclk = &fabric->info.nodeclk[ctx]; |
| 270 | /** |
| 271 | * Send a clock request only when the client requests in active |
| 272 | * context and the ACTIVE_CTX clock rate is selected OR the |
| 273 | * client request is in normal context and normal clock rate |
| 274 | * is selected. |
| 275 | */ |
| 276 | if (nodeclk->clk && (!((ctx == ACTIVE_CTX) ^ cl_active_flag))) { |
| 277 | MSM_BUS_DBG("clks: id: %d set-clk: %lu bwsum_hz:%lu\n", |
| 278 | fabric->fabdev.id, *pclk, bwsum_hz); |
| 279 | if (nodeclk->rate != *pclk) { |
| 280 | nodeclk->dirty = true; |
| 281 | nodeclk->rate = *pclk; |
| 282 | } |
| 283 | fabric->clk_dirty = true; |
| 284 | } |
| 285 | } else { |
| 286 | nodeclk = &slave->nodeclk[ctx]; |
| 287 | if (nodeclk->clk && (!((ctx == ACTIVE_CTX) ^ cl_active_flag))) { |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 288 | rate = *pclk; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 289 | MSM_BUS_DBG("AXI_clks: id: %d set-clk: %lu " |
| 290 | "bwsum_hz: %lu\n" , slave->node_info->priv_id, rate, |
| 291 | bwsum_hz); |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 292 | if (nodeclk->rate != rate) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 293 | nodeclk->dirty = true; |
| 294 | nodeclk->rate = rate; |
| 295 | } |
| 296 | } |
| 297 | if (!status && slave->memclk.clk && |
| 298 | (!((ctx == ACTIVE_CTX) ^ cl_active_flag))) { |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 299 | rate = *slave->link_info.sel_clk; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 300 | if (slave->memclk.rate != rate) { |
| 301 | slave->memclk.rate = rate; |
| 302 | slave->memclk.dirty = true; |
| 303 | } |
| 304 | slave->memclk.rate = rate; |
| 305 | fabric->clk_dirty = true; |
| 306 | } |
| 307 | } |
| 308 | skip_set_clks: |
| 309 | return status; |
| 310 | } |
| 311 | |
| 312 | void msm_bus_fabric_update_bw(struct msm_bus_fabric_device *fabdev, |
| 313 | struct msm_bus_inode_info *hop, struct msm_bus_inode_info *info, |
| 314 | long int add_bw, int *master_tiers, int ctx) |
| 315 | { |
| 316 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 317 | void *sel_cdata; |
| 318 | |
| 319 | sel_cdata = fabric->cdata[ctx]; |
| 320 | |
| 321 | /* If it's an ahb fabric, don't calculate arb values */ |
| 322 | if (fabric->ahb) { |
| 323 | MSM_FAB_DBG("AHB fabric, skipping bw calculation\n"); |
| 324 | return; |
| 325 | } |
| 326 | if (!add_bw) { |
| 327 | MSM_BUS_DBG("No bandwidth delta. Skipping commit\n"); |
| 328 | return; |
| 329 | } |
| 330 | |
| 331 | msm_bus_rpm_update_bw(hop, info, fabric->pdata, sel_cdata, |
| 332 | master_tiers, add_bw); |
| 333 | fabric->arb_dirty = true; |
| 334 | } |
| 335 | |
| 336 | static int msm_bus_fabric_clk_set(int enable, struct msm_bus_inode_info *info) |
| 337 | { |
| 338 | int i, status = 0; |
| 339 | for (i = 0; i < NUM_CTX; i++) |
| 340 | if (info->nodeclk[i].dirty) { |
| 341 | status = clk_set_min_rate(info->nodeclk[i].clk, info-> |
| 342 | nodeclk[i].rate); |
| 343 | if (enable && !(info->nodeclk[i].enable)) { |
| 344 | clk_enable(info->nodeclk[i].clk); |
| 345 | info->nodeclk[i].dirty = false; |
| 346 | info->nodeclk[i].enable = true; |
| 347 | } else if ((info->nodeclk[i].rate == 0) && (!enable) |
| 348 | && (info->nodeclk[i].enable)) { |
| 349 | clk_disable(info->nodeclk[i].clk); |
| 350 | info->nodeclk[i].dirty = false; |
| 351 | info->nodeclk[i].enable = false; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | if (info->memclk.dirty) { |
| 356 | status = clk_set_min_rate(info->memclk.clk, info->memclk.rate); |
| 357 | if (enable && !(info->memclk.enable)) { |
| 358 | clk_enable(info->memclk.clk); |
| 359 | info->memclk.dirty = false; |
| 360 | info->memclk.enable = true; |
| 361 | } else if (info->memclk.rate == 0 && (!enable) && |
| 362 | (info->memclk.enable)) { |
| 363 | clk_disable(info->memclk.clk); |
| 364 | info->memclk.dirty = false; |
| 365 | info->memclk.enable = false; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | return status; |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * msm_bus_fabric_clk_commit() - Call clock enable and update clock |
| 374 | * values. |
| 375 | */ |
| 376 | static int msm_bus_fabric_clk_commit(int enable, struct msm_bus_fabric *fabric) |
| 377 | { |
| 378 | unsigned int i, nfound = 0, status = 0; |
| 379 | struct msm_bus_inode_info *info[fabric->pdata->nslaves]; |
| 380 | |
| 381 | if (fabric->clk_dirty == false) { |
| 382 | MSM_BUS_DBG("No clocks have been touched for fabric: %d\n", |
| 383 | fabric->fabdev.id); |
| 384 | goto out; |
| 385 | } else |
| 386 | status = msm_bus_fabric_clk_set(enable, &fabric->info); |
| 387 | |
| 388 | if (status) |
| 389 | MSM_BUS_WARN("Error setting clocks on fabric: %d\n", |
| 390 | fabric->fabdev.id); |
| 391 | |
| 392 | nfound = radix_tree_gang_lookup_tag(&fabric->fab_tree, (void **)&info, |
| 393 | fabric->fabdev.id, fabric->pdata->nslaves, SLAVE_NODE); |
| 394 | if (nfound == 0) { |
| 395 | MSM_BUS_DBG("No slaves found for fabric: %d\n", |
| 396 | fabric->fabdev.id); |
| 397 | goto out; |
| 398 | } |
| 399 | |
| 400 | for (i = 0; i < nfound; i++) { |
| 401 | status = msm_bus_fabric_clk_set(enable, info[i]); |
| 402 | if (status) |
| 403 | MSM_BUS_WARN("Error setting clocks for node: %d\n", |
| 404 | info[i]->node_info->id); |
| 405 | } |
| 406 | |
| 407 | out: |
| 408 | return status; |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * msm_bus_fabric_rpm_commit() - Commit the arbitration data to RPM |
| 413 | * @fabric: Fabric for which the data should be committed |
| 414 | * */ |
| 415 | static int msm_bus_fabric_rpm_commit(struct msm_bus_fabric_device *fabdev, |
| 416 | int ctx) |
| 417 | |
| 418 | { |
| 419 | int status = 0; |
| 420 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 421 | void *cdata; |
| 422 | |
| 423 | /* |
| 424 | * For a non-zero bandwidth request, clocks should be enabled before |
| 425 | * sending the arbitration data to RPM, but should be disabled only |
| 426 | * after commiting the data. |
| 427 | */ |
| 428 | status = msm_bus_fabric_clk_commit(ENABLE, fabric); |
| 429 | if (status) |
| 430 | MSM_BUS_DBG("Error setting clocks on fabric: %d\n", |
| 431 | fabric->fabdev.id); |
| 432 | |
| 433 | if (!fabric->arb_dirty) { |
| 434 | MSM_BUS_DBG("Not committing as fabric not arb_dirty\n"); |
| 435 | goto skip_arb; |
| 436 | } |
| 437 | |
| 438 | cdata = fabric->cdata[ctx]; |
| 439 | status = msm_bus_rpm_commit(fabric->pdata, ctx, |
| 440 | fabric->rpm_data, cdata); |
| 441 | if (status) |
| 442 | MSM_BUS_DBG("Error committing arb data for fabric: %d\n", |
| 443 | fabric->fabdev.id); |
| 444 | |
| 445 | fabric->arb_dirty = false; |
| 446 | skip_arb: |
| 447 | /* |
| 448 | * If the bandwidth request is 0 for a fabric, the clocks |
| 449 | * should be disabled after arbitration data is committed. |
| 450 | */ |
| 451 | status = msm_bus_fabric_clk_commit(DISABLE, fabric); |
| 452 | if (status) |
| 453 | MSM_BUS_DBG("Error disabling clocks on fabric: %d\n", |
| 454 | fabric->fabdev.id); |
| 455 | |
| 456 | fabric->clk_dirty = false; |
| 457 | return status; |
| 458 | } |
| 459 | |
| 460 | /** |
| 461 | * msm_bus_fabric_port_halt() - Used to halt a master port |
| 462 | * @fabric: Fabric on which the current master node is present |
| 463 | * @portid: Port id of the master |
| 464 | */ |
| 465 | int msm_bus_fabric_port_halt(struct msm_bus_fabric_device *fabdev, int iid) |
| 466 | { |
| 467 | struct msm_bus_halt_vector hvector = {0, 0}; |
| 468 | struct msm_rpm_iv_pair rpm_data[2]; |
| 469 | struct msm_bus_inode_info *info = NULL; |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 470 | uint8_t mport; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 471 | uint32_t haltid = 0; |
| 472 | int status = 0; |
| 473 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 474 | |
| 475 | info = fabdev->algo->find_node(fabdev, iid); |
| 476 | if (!info) { |
| 477 | MSM_BUS_ERR("Error: Info not found for id: %u", iid); |
| 478 | return -EINVAL; |
| 479 | } |
| 480 | |
| 481 | haltid = fabric->pdata->haltid; |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 482 | mport = info->node_info->masterp[0]; |
| 483 | MSM_BUS_MASTER_HALT(hvector.haltmask, hvector.haltval, mport); |
| 484 | rpm_data[0].id = haltid; |
| 485 | rpm_data[0].value = hvector.haltval; |
| 486 | rpm_data[1].id = haltid + 1; |
| 487 | rpm_data[1].value = hvector.haltmask; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 488 | |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 489 | MSM_FAB_DBG("ctx: %d, id: %d, value: %d\n", |
| 490 | MSM_RPM_CTX_SET_0, rpm_data[0].id, rpm_data[0].value); |
| 491 | MSM_FAB_DBG("ctx: %d, id: %d, value: %d\n", |
| 492 | MSM_RPM_CTX_SET_0, rpm_data[1].id, rpm_data[1].value); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 493 | |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 494 | if (fabric->pdata->rpm_enabled) |
| 495 | status = msm_rpm_set(MSM_RPM_CTX_SET_0, rpm_data, 2); |
| 496 | if (status) |
| 497 | MSM_BUS_ERR("msm_rpm_set returned: %d\n", status); |
| 498 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 499 | return status; |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * msm_bus_fabric_port_unhalt() - Used to unhalt a master port |
| 504 | * @fabric: Fabric on which the current master node is present |
| 505 | * @portid: Port id of the master |
| 506 | */ |
| 507 | int msm_bus_fabric_port_unhalt(struct msm_bus_fabric_device *fabdev, int iid) |
| 508 | { |
| 509 | struct msm_bus_halt_vector hvector = {0, 0}; |
| 510 | struct msm_rpm_iv_pair rpm_data[2]; |
| 511 | struct msm_bus_inode_info *info = NULL; |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 512 | uint8_t mport; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 513 | uint32_t haltid = 0; |
| 514 | int status = 0; |
| 515 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 516 | |
| 517 | info = fabdev->algo->find_node(fabdev, iid); |
| 518 | if (!info) { |
| 519 | MSM_BUS_ERR("Error: Info not found for id: %u", iid); |
| 520 | return -EINVAL; |
| 521 | } |
| 522 | |
| 523 | haltid = fabric->pdata->haltid; |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 524 | mport = info->node_info->masterp[0]; |
| 525 | MSM_BUS_MASTER_UNHALT(hvector.haltmask, hvector.haltval, |
| 526 | mport); |
| 527 | rpm_data[0].id = haltid; |
| 528 | rpm_data[0].value = hvector.haltval; |
| 529 | rpm_data[1].id = haltid + 1; |
| 530 | rpm_data[1].value = hvector.haltmask; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 531 | |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 532 | MSM_FAB_DBG("unalt: ctx: %d, id: %d, value: %d\n", |
| 533 | MSM_RPM_CTX_SET_SLEEP, rpm_data[0].id, rpm_data[0].value); |
| 534 | MSM_FAB_DBG("unhalt: ctx: %d, id: %d, value: %d\n", |
| 535 | MSM_RPM_CTX_SET_SLEEP, rpm_data[1].id, rpm_data[1].value); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 536 | |
Gagan Mac | c7c0db6 | 2011-07-20 13:07:29 -0600 | [diff] [blame^] | 537 | if (fabric->pdata->rpm_enabled) |
| 538 | status = msm_rpm_set(MSM_RPM_CTX_SET_0, rpm_data, 2); |
| 539 | if (status) |
| 540 | MSM_BUS_ERR("msm_rpm_set returned: %d\n", status); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 541 | |
| 542 | return status; |
| 543 | } |
| 544 | |
| 545 | /** |
| 546 | * msm_bus_fabric_find_gw_node() - This function finds the gateway node |
| 547 | * attached on a given fabric |
| 548 | * @id: ID of the gateway node |
| 549 | * @fabric: Fabric to find the gateway node on |
| 550 | * Function returns: Pointer to the gateway node |
| 551 | */ |
| 552 | static struct msm_bus_inode_info *msm_bus_fabric_find_gw_node(struct |
| 553 | msm_bus_fabric_device * fabdev, int id) |
| 554 | { |
| 555 | struct msm_bus_inode_info *info = NULL; |
| 556 | struct msm_bus_fabnodeinfo *fab; |
| 557 | struct msm_bus_fabric *fabric; |
| 558 | if (!fabdev) { |
| 559 | MSM_BUS_ERR("No fabric device found!\n"); |
| 560 | return NULL; |
| 561 | } |
| 562 | |
| 563 | fabric = to_msm_bus_fabric(fabdev); |
| 564 | if (!fabric || IS_ERR(fabric)) { |
| 565 | MSM_BUS_ERR("No fabric type found!\n"); |
| 566 | return NULL; |
| 567 | } |
| 568 | list_for_each_entry(fab, &fabric->gateways, list) { |
| 569 | if (fab->info->node_info->priv_id == id) { |
| 570 | info = fab->info; |
| 571 | break; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | return info; |
| 576 | } |
| 577 | |
| 578 | static struct msm_bus_inode_info *msm_bus_fabric_find_node(struct |
| 579 | msm_bus_fabric_device * fabdev, int id) |
| 580 | { |
| 581 | struct msm_bus_inode_info *info = NULL; |
| 582 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 583 | info = radix_tree_lookup(&fabric->fab_tree, id); |
| 584 | if (!info) |
| 585 | MSM_FAB_DBG("Null info found for id %d\n", id); |
| 586 | return info; |
| 587 | } |
| 588 | |
| 589 | static struct list_head *msm_bus_fabric_get_gw_list(struct msm_bus_fabric_device |
| 590 | *fabdev) |
| 591 | { |
| 592 | struct msm_bus_fabric *fabric = to_msm_bus_fabric(fabdev); |
| 593 | if (!fabric || IS_ERR(fabric)) { |
| 594 | MSM_BUS_ERR("No fabric found from fabdev\n"); |
| 595 | return NULL; |
| 596 | } |
| 597 | return &fabric->gateways; |
| 598 | |
| 599 | } |
| 600 | static struct msm_bus_fab_algorithm msm_bus_algo = { |
| 601 | .update_clks = msm_bus_fabric_update_clks, |
| 602 | .update_bw = msm_bus_fabric_update_bw, |
| 603 | .port_halt = msm_bus_fabric_port_halt, |
| 604 | .port_unhalt = msm_bus_fabric_port_unhalt, |
| 605 | .commit = msm_bus_fabric_rpm_commit, |
| 606 | .find_node = msm_bus_fabric_find_node, |
| 607 | .find_gw_node = msm_bus_fabric_find_gw_node, |
| 608 | .get_gw_list = msm_bus_fabric_get_gw_list, |
| 609 | }; |
| 610 | |
| 611 | static int msm_bus_fabric_probe(struct platform_device *pdev) |
| 612 | { |
| 613 | int ctx, ret = 0; |
| 614 | struct msm_bus_fabric *fabric; |
| 615 | struct msm_bus_fabric_registration *pdata; |
| 616 | |
| 617 | fabric = kzalloc(sizeof(struct msm_bus_fabric), GFP_KERNEL); |
| 618 | if (!fabric) { |
| 619 | MSM_BUS_ERR("Fabric alloc failed\n"); |
| 620 | return -ENOMEM; |
| 621 | } |
| 622 | |
| 623 | INIT_LIST_HEAD(&fabric->gateways); |
| 624 | INIT_RADIX_TREE(&fabric->fab_tree, GFP_ATOMIC); |
| 625 | fabric->num_nodes = 0; |
| 626 | fabric->fabdev.id = pdev->id; |
| 627 | fabric->fabdev.visited = false; |
| 628 | |
| 629 | fabric->info.node_info = kzalloc(sizeof(struct msm_bus_node_info), |
| 630 | GFP_KERNEL); |
| 631 | if (!fabric->info.node_info) { |
| 632 | MSM_BUS_ERR("Fabric node info alloc failed\n"); |
| 633 | kfree(fabric); |
| 634 | return -ENOMEM; |
| 635 | } |
| 636 | fabric->info.node_info->priv_id = fabric->fabdev.id; |
| 637 | fabric->info.node_info->id = fabric->fabdev.id; |
| 638 | fabric->info.num_pnodes = -1; |
| 639 | fabric->info.link_info.clk[DUAL_CTX] = 0; |
| 640 | fabric->info.link_info.bw[DUAL_CTX] = 0; |
| 641 | fabric->info.link_info.clk[ACTIVE_CTX] = 0; |
| 642 | fabric->info.link_info.bw[ACTIVE_CTX] = 0; |
| 643 | |
| 644 | fabric->fabdev.id = pdev->id; |
| 645 | pdata = (struct msm_bus_fabric_registration *)pdev->dev.platform_data; |
| 646 | fabric->fabdev.name = pdata->name; |
| 647 | fabric->fabdev.algo = &msm_bus_algo; |
| 648 | fabric->ahb = pdata->ahb; |
| 649 | fabric->pdata = pdata; |
| 650 | msm_bus_board_assign_iids(fabric->pdata, fabric->fabdev.id); |
| 651 | |
| 652 | for (ctx = 0; ctx < NUM_CTX; ctx++) { |
| 653 | if (pdata->fabclk[ctx]) { |
| 654 | fabric->info.nodeclk[ctx].clk = clk_get(NULL, |
| 655 | pdata->fabclk[ctx]); |
| 656 | if (IS_ERR(fabric->info.nodeclk[ctx].clk)) { |
| 657 | MSM_BUS_ERR("Couldn't get clock %s\n", |
| 658 | pdata->fabclk[ctx]); |
| 659 | ret = -EINVAL; |
| 660 | goto err; |
| 661 | } |
| 662 | fabric->info.nodeclk[ctx].enable = false; |
| 663 | fabric->info.nodeclk[ctx].dirty = false; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /* Find num. of slaves, masters, populate gateways, radix tree */ |
| 668 | ret = register_fabric_info(fabric); |
| 669 | if (ret) { |
| 670 | MSM_BUS_ERR("Could not register fabric %d info, ret: %d\n", |
| 671 | fabric->fabdev.id, ret); |
| 672 | goto err; |
| 673 | } |
| 674 | if (!fabric->ahb) { |
| 675 | /* Allocate memory for commit data */ |
| 676 | for (ctx = 0; ctx < NUM_CTX; ctx++) { |
| 677 | ret = allocate_commit_data(fabric->pdata, &fabric-> |
| 678 | cdata[ctx]); |
| 679 | if (ret) { |
| 680 | MSM_BUS_ERR("Failed to alloc commit data for " |
| 681 | "fab: %d, ret = %d\n", |
| 682 | fabric->fabdev.id, ret); |
| 683 | goto err; |
| 684 | } |
| 685 | } |
| 686 | } |
| 687 | /* |
| 688 | * clk and bw for fabric->info will contain the max bw and clk |
| 689 | * it will allow. This info will come from the boards file. |
| 690 | */ |
| 691 | ret = msm_bus_fabric_device_register(&fabric->fabdev); |
| 692 | if (ret) { |
| 693 | MSM_BUS_ERR("Error registering fabric %d ret %d\n", |
| 694 | fabric->fabdev.id, ret); |
| 695 | goto err; |
| 696 | } |
| 697 | |
| 698 | return ret; |
| 699 | err: |
| 700 | kfree(fabric->info.node_info); |
| 701 | kfree(fabric); |
| 702 | return ret; |
| 703 | } |
| 704 | |
| 705 | static int msm_bus_fabric_remove(struct platform_device *pdev) |
| 706 | { |
| 707 | struct msm_bus_fabric_device *fabdev = NULL; |
| 708 | struct msm_bus_fabric *fabric; |
| 709 | int i; |
| 710 | int ret = 0; |
| 711 | |
| 712 | fabdev = platform_get_drvdata(pdev); |
| 713 | msm_bus_fabric_device_unregister(fabdev); |
| 714 | fabric = to_msm_bus_fabric(fabdev); |
| 715 | msm_bus_dbg_commit_data(fabric->fabdev.name, NULL, 0, 0, 0, |
| 716 | MSM_BUS_DBG_UNREGISTER); |
| 717 | for (i = 0; i < fabric->pdata->nmasters; i++) |
| 718 | radix_tree_delete(&fabric->fab_tree, fabric->fabdev.id + i); |
| 719 | for (i = (fabric->fabdev.id + SLAVE_ID_KEY); i < |
| 720 | fabric->pdata->nslaves; i++) |
| 721 | radix_tree_delete(&fabric->fab_tree, i); |
| 722 | if (!fabric->ahb) { |
| 723 | free_commit_data(fabric->cdata[DUAL_CTX]); |
| 724 | free_commit_data(fabric->cdata[ACTIVE_CTX]); |
| 725 | } |
| 726 | |
| 727 | kfree(fabric->info.node_info); |
| 728 | kfree(fabric->rpm_data); |
| 729 | kfree(fabric); |
| 730 | return ret; |
| 731 | } |
| 732 | |
| 733 | static struct platform_driver msm_bus_fabric_driver = { |
| 734 | .probe = msm_bus_fabric_probe, |
| 735 | .remove = msm_bus_fabric_remove, |
| 736 | .driver = { |
| 737 | .name = "msm_bus_fabric", |
| 738 | .owner = THIS_MODULE, |
| 739 | }, |
| 740 | }; |
| 741 | |
| 742 | static int __init msm_bus_fabric_init_driver(void) |
| 743 | { |
| 744 | MSM_BUS_ERR("msm_bus_fabric_init_driver\n"); |
| 745 | return platform_driver_register(&msm_bus_fabric_driver); |
| 746 | } |
| 747 | postcore_initcall(msm_bus_fabric_init_driver); |