Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (c) 2005 Silicon Graphics, Inc. All rights reserved. |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * MOATB Core Services driver. |
| 11 | */ |
| 12 | |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/moduleparam.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/ioport.h> |
Randy Dunlap | a81a8f5 | 2009-09-04 16:58:05 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 19 | #include <linux/notifier.h> |
| 20 | #include <linux/reboot.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/device.h> |
| 25 | #include <linux/mm.h> |
| 26 | #include <linux/uio.h> |
Matthias Kaehlcke | a40ba84 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 27 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 29 | #include <asm/io.h> |
| 30 | #include <asm/uaccess.h> |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 31 | #include <asm/pgtable.h> |
| 32 | #include <asm/sn/addrs.h> |
| 33 | #include <asm/sn/intr.h> |
| 34 | #include <asm/sn/tiocx.h> |
| 35 | #include "mbcs.h" |
| 36 | |
| 37 | #define MBCS_DEBUG 0 |
| 38 | #if MBCS_DEBUG |
| 39 | #define DBG(fmt...) printk(KERN_ALERT fmt) |
| 40 | #else |
| 41 | #define DBG(fmt...) |
| 42 | #endif |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 43 | static DEFINE_MUTEX(mbcs_mutex); |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 44 | static int mbcs_major; |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 45 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 46 | static LIST_HEAD(soft_list); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 47 | |
| 48 | /* |
| 49 | * file operations |
| 50 | */ |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 51 | static const struct file_operations mbcs_ops = { |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 52 | .open = mbcs_open, |
| 53 | .llseek = mbcs_sram_llseek, |
| 54 | .read = mbcs_sram_read, |
| 55 | .write = mbcs_sram_write, |
| 56 | .mmap = mbcs_gscr_mmap, |
| 57 | }; |
| 58 | |
| 59 | struct mbcs_callback_arg { |
| 60 | int minor; |
| 61 | struct cx_dev *cx_dev; |
| 62 | }; |
| 63 | |
| 64 | static inline void mbcs_getdma_init(struct getdma *gdma) |
| 65 | { |
| 66 | memset(gdma, 0, sizeof(struct getdma)); |
| 67 | gdma->DoneIntEnable = 1; |
| 68 | } |
| 69 | |
| 70 | static inline void mbcs_putdma_init(struct putdma *pdma) |
| 71 | { |
| 72 | memset(pdma, 0, sizeof(struct putdma)); |
| 73 | pdma->DoneIntEnable = 1; |
| 74 | } |
| 75 | |
| 76 | static inline void mbcs_algo_init(struct algoblock *algo_soft) |
| 77 | { |
| 78 | memset(algo_soft, 0, sizeof(struct algoblock)); |
| 79 | } |
| 80 | |
| 81 | static inline void mbcs_getdma_set(void *mmr, |
| 82 | uint64_t hostAddr, |
| 83 | uint64_t localAddr, |
| 84 | uint64_t localRamSel, |
| 85 | uint64_t numPkts, |
| 86 | uint64_t amoEnable, |
| 87 | uint64_t intrEnable, |
| 88 | uint64_t peerIO, |
| 89 | uint64_t amoHostDest, |
| 90 | uint64_t amoModType, uint64_t intrHostDest, |
| 91 | uint64_t intrVector) |
| 92 | { |
| 93 | union dma_control rdma_control; |
| 94 | union dma_amo_dest amo_dest; |
| 95 | union intr_dest intr_dest; |
| 96 | union dma_localaddr local_addr; |
| 97 | union dma_hostaddr host_addr; |
| 98 | |
| 99 | rdma_control.dma_control_reg = 0; |
| 100 | amo_dest.dma_amo_dest_reg = 0; |
| 101 | intr_dest.intr_dest_reg = 0; |
| 102 | local_addr.dma_localaddr_reg = 0; |
| 103 | host_addr.dma_hostaddr_reg = 0; |
| 104 | |
| 105 | host_addr.dma_sys_addr = hostAddr; |
| 106 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); |
| 107 | |
| 108 | local_addr.dma_ram_addr = localAddr; |
| 109 | local_addr.dma_ram_sel = localRamSel; |
| 110 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); |
| 111 | |
| 112 | rdma_control.dma_op_length = numPkts; |
| 113 | rdma_control.done_amo_en = amoEnable; |
| 114 | rdma_control.done_int_en = intrEnable; |
| 115 | rdma_control.pio_mem_n = peerIO; |
| 116 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg); |
| 117 | |
| 118 | amo_dest.dma_amo_sys_addr = amoHostDest; |
| 119 | amo_dest.dma_amo_mod_type = amoModType; |
| 120 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); |
| 121 | |
| 122 | intr_dest.address = intrHostDest; |
| 123 | intr_dest.int_vector = intrVector; |
| 124 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg); |
| 125 | |
| 126 | } |
| 127 | |
| 128 | static inline void mbcs_putdma_set(void *mmr, |
| 129 | uint64_t hostAddr, |
| 130 | uint64_t localAddr, |
| 131 | uint64_t localRamSel, |
| 132 | uint64_t numPkts, |
| 133 | uint64_t amoEnable, |
| 134 | uint64_t intrEnable, |
| 135 | uint64_t peerIO, |
| 136 | uint64_t amoHostDest, |
| 137 | uint64_t amoModType, |
| 138 | uint64_t intrHostDest, uint64_t intrVector) |
| 139 | { |
| 140 | union dma_control wdma_control; |
| 141 | union dma_amo_dest amo_dest; |
| 142 | union intr_dest intr_dest; |
| 143 | union dma_localaddr local_addr; |
| 144 | union dma_hostaddr host_addr; |
| 145 | |
| 146 | wdma_control.dma_control_reg = 0; |
| 147 | amo_dest.dma_amo_dest_reg = 0; |
| 148 | intr_dest.intr_dest_reg = 0; |
| 149 | local_addr.dma_localaddr_reg = 0; |
| 150 | host_addr.dma_hostaddr_reg = 0; |
| 151 | |
| 152 | host_addr.dma_sys_addr = hostAddr; |
| 153 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); |
| 154 | |
| 155 | local_addr.dma_ram_addr = localAddr; |
| 156 | local_addr.dma_ram_sel = localRamSel; |
| 157 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); |
| 158 | |
| 159 | wdma_control.dma_op_length = numPkts; |
| 160 | wdma_control.done_amo_en = amoEnable; |
| 161 | wdma_control.done_int_en = intrEnable; |
| 162 | wdma_control.pio_mem_n = peerIO; |
| 163 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg); |
| 164 | |
| 165 | amo_dest.dma_amo_sys_addr = amoHostDest; |
| 166 | amo_dest.dma_amo_mod_type = amoModType; |
| 167 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); |
| 168 | |
| 169 | intr_dest.address = intrHostDest; |
| 170 | intr_dest.int_vector = intrVector; |
| 171 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg); |
| 172 | |
| 173 | } |
| 174 | |
| 175 | static inline void mbcs_algo_set(void *mmr, |
| 176 | uint64_t amoHostDest, |
| 177 | uint64_t amoModType, |
| 178 | uint64_t intrHostDest, |
| 179 | uint64_t intrVector, uint64_t algoStepCount) |
| 180 | { |
| 181 | union dma_amo_dest amo_dest; |
| 182 | union intr_dest intr_dest; |
| 183 | union algo_step step; |
| 184 | |
| 185 | step.algo_step_reg = 0; |
| 186 | intr_dest.intr_dest_reg = 0; |
| 187 | amo_dest.dma_amo_dest_reg = 0; |
| 188 | |
| 189 | amo_dest.dma_amo_sys_addr = amoHostDest; |
| 190 | amo_dest.dma_amo_mod_type = amoModType; |
| 191 | MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg); |
| 192 | |
| 193 | intr_dest.address = intrHostDest; |
| 194 | intr_dest.int_vector = intrVector; |
| 195 | MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg); |
| 196 | |
| 197 | step.alg_step_cnt = algoStepCount; |
| 198 | MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg); |
| 199 | } |
| 200 | |
| 201 | static inline int mbcs_getdma_start(struct mbcs_soft *soft) |
| 202 | { |
| 203 | void *mmr_base; |
| 204 | struct getdma *gdma; |
| 205 | uint64_t numPkts; |
| 206 | union cm_control cm_control; |
| 207 | |
| 208 | mmr_base = soft->mmr_base; |
| 209 | gdma = &soft->getdma; |
| 210 | |
| 211 | /* check that host address got setup */ |
| 212 | if (!gdma->hostAddr) |
| 213 | return -1; |
| 214 | |
| 215 | numPkts = |
| 216 | (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; |
| 217 | |
| 218 | /* program engine */ |
| 219 | mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr), |
| 220 | gdma->localAddr, |
| 221 | (gdma->localAddr < MB2) ? 0 : |
| 222 | (gdma->localAddr < MB4) ? 1 : |
| 223 | (gdma->localAddr < MB6) ? 2 : 3, |
| 224 | numPkts, |
| 225 | gdma->DoneAmoEnable, |
| 226 | gdma->DoneIntEnable, |
| 227 | gdma->peerIO, |
| 228 | gdma->amoHostDest, |
| 229 | gdma->amoModType, |
| 230 | gdma->intrHostDest, gdma->intrVector); |
| 231 | |
| 232 | /* start engine */ |
| 233 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 234 | cm_control.rd_dma_go = 1; |
| 235 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); |
| 236 | |
| 237 | return 0; |
| 238 | |
| 239 | } |
| 240 | |
| 241 | static inline int mbcs_putdma_start(struct mbcs_soft *soft) |
| 242 | { |
| 243 | void *mmr_base; |
| 244 | struct putdma *pdma; |
| 245 | uint64_t numPkts; |
| 246 | union cm_control cm_control; |
| 247 | |
| 248 | mmr_base = soft->mmr_base; |
| 249 | pdma = &soft->putdma; |
| 250 | |
| 251 | /* check that host address got setup */ |
| 252 | if (!pdma->hostAddr) |
| 253 | return -1; |
| 254 | |
| 255 | numPkts = |
| 256 | (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; |
| 257 | |
| 258 | /* program engine */ |
| 259 | mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr), |
| 260 | pdma->localAddr, |
| 261 | (pdma->localAddr < MB2) ? 0 : |
| 262 | (pdma->localAddr < MB4) ? 1 : |
| 263 | (pdma->localAddr < MB6) ? 2 : 3, |
| 264 | numPkts, |
| 265 | pdma->DoneAmoEnable, |
| 266 | pdma->DoneIntEnable, |
| 267 | pdma->peerIO, |
| 268 | pdma->amoHostDest, |
| 269 | pdma->amoModType, |
| 270 | pdma->intrHostDest, pdma->intrVector); |
| 271 | |
| 272 | /* start engine */ |
| 273 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 274 | cm_control.wr_dma_go = 1; |
| 275 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); |
| 276 | |
| 277 | return 0; |
| 278 | |
| 279 | } |
| 280 | |
| 281 | static inline int mbcs_algo_start(struct mbcs_soft *soft) |
| 282 | { |
| 283 | struct algoblock *algo_soft = &soft->algo; |
| 284 | void *mmr_base = soft->mmr_base; |
| 285 | union cm_control cm_control; |
| 286 | |
Matthias Kaehlcke | a40ba84 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 287 | if (mutex_lock_interruptible(&soft->algolock)) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 288 | return -ERESTARTSYS; |
| 289 | |
| 290 | atomic_set(&soft->algo_done, 0); |
| 291 | |
| 292 | mbcs_algo_set(mmr_base, |
| 293 | algo_soft->amoHostDest, |
| 294 | algo_soft->amoModType, |
| 295 | algo_soft->intrHostDest, |
| 296 | algo_soft->intrVector, algo_soft->algoStepCount); |
| 297 | |
| 298 | /* start algorithm */ |
| 299 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 300 | cm_control.alg_done_int_en = 1; |
| 301 | cm_control.alg_go = 1; |
| 302 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); |
| 303 | |
Matthias Kaehlcke | a40ba84 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 304 | mutex_unlock(&soft->algolock); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static inline ssize_t |
| 310 | do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr, |
| 311 | size_t len, loff_t * off) |
| 312 | { |
| 313 | int rv = 0; |
| 314 | |
Matthias Kaehlcke | 46bca69 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 315 | if (mutex_lock_interruptible(&soft->dmawritelock)) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 316 | return -ERESTARTSYS; |
| 317 | |
| 318 | atomic_set(&soft->dmawrite_done, 0); |
| 319 | |
| 320 | soft->putdma.hostAddr = hostAddr; |
| 321 | soft->putdma.localAddr = *off; |
| 322 | soft->putdma.bytes = len; |
| 323 | |
| 324 | if (mbcs_putdma_start(soft) < 0) { |
| 325 | DBG(KERN_ALERT "do_mbcs_sram_dmawrite: " |
| 326 | "mbcs_putdma_start failed\n"); |
| 327 | rv = -EAGAIN; |
| 328 | goto dmawrite_exit; |
| 329 | } |
| 330 | |
| 331 | if (wait_event_interruptible(soft->dmawrite_queue, |
| 332 | atomic_read(&soft->dmawrite_done))) { |
| 333 | rv = -ERESTARTSYS; |
| 334 | goto dmawrite_exit; |
| 335 | } |
| 336 | |
| 337 | rv = len; |
| 338 | *off += len; |
| 339 | |
| 340 | dmawrite_exit: |
Matthias Kaehlcke | 46bca69 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 341 | mutex_unlock(&soft->dmawritelock); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 342 | |
| 343 | return rv; |
| 344 | } |
| 345 | |
| 346 | static inline ssize_t |
| 347 | do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr, |
| 348 | size_t len, loff_t * off) |
| 349 | { |
| 350 | int rv = 0; |
| 351 | |
Matthias Kaehlcke | ae5e297 | 2008-02-07 00:15:25 -0800 | [diff] [blame] | 352 | if (mutex_lock_interruptible(&soft->dmareadlock)) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 353 | return -ERESTARTSYS; |
| 354 | |
| 355 | atomic_set(&soft->dmawrite_done, 0); |
| 356 | |
| 357 | soft->getdma.hostAddr = hostAddr; |
| 358 | soft->getdma.localAddr = *off; |
| 359 | soft->getdma.bytes = len; |
| 360 | |
| 361 | if (mbcs_getdma_start(soft) < 0) { |
| 362 | DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n"); |
| 363 | rv = -EAGAIN; |
| 364 | goto dmaread_exit; |
| 365 | } |
| 366 | |
| 367 | if (wait_event_interruptible(soft->dmaread_queue, |
| 368 | atomic_read(&soft->dmaread_done))) { |
| 369 | rv = -ERESTARTSYS; |
| 370 | goto dmaread_exit; |
| 371 | } |
| 372 | |
| 373 | rv = len; |
| 374 | *off += len; |
| 375 | |
| 376 | dmaread_exit: |
Matthias Kaehlcke | ae5e297 | 2008-02-07 00:15:25 -0800 | [diff] [blame] | 377 | mutex_unlock(&soft->dmareadlock); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 378 | |
| 379 | return rv; |
| 380 | } |
| 381 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 382 | static int mbcs_open(struct inode *ip, struct file *fp) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 383 | { |
| 384 | struct mbcs_soft *soft; |
| 385 | int minor; |
| 386 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 387 | mutex_lock(&mbcs_mutex); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 388 | minor = iminor(ip); |
| 389 | |
Jonathan Corbet | 12ead6b | 2008-05-15 11:24:23 -0600 | [diff] [blame] | 390 | /* Nothing protects access to this list... */ |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 391 | list_for_each_entry(soft, &soft_list, list) { |
| 392 | if (soft->nasid == minor) { |
| 393 | fp->private_data = soft->cxdev; |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 394 | mutex_unlock(&mbcs_mutex); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 395 | return 0; |
| 396 | } |
| 397 | } |
| 398 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 399 | mutex_unlock(&mbcs_mutex); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 400 | return -ENODEV; |
| 401 | } |
| 402 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 403 | static ssize_t mbcs_sram_read(struct file * fp, char __user *buf, size_t len, loff_t * off) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 404 | { |
| 405 | struct cx_dev *cx_dev = fp->private_data; |
| 406 | struct mbcs_soft *soft = cx_dev->soft; |
| 407 | uint64_t hostAddr; |
| 408 | int rv = 0; |
| 409 | |
| 410 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); |
| 411 | if (hostAddr == 0) |
| 412 | return -ENOMEM; |
| 413 | |
| 414 | rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off); |
| 415 | if (rv < 0) |
| 416 | goto exit; |
| 417 | |
| 418 | if (copy_to_user(buf, (void *)hostAddr, len)) |
| 419 | rv = -EFAULT; |
| 420 | |
| 421 | exit: |
| 422 | free_pages(hostAddr, get_order(len)); |
| 423 | |
| 424 | return rv; |
| 425 | } |
| 426 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 427 | static ssize_t |
Al Viro | 9b52523 | 2005-05-04 05:39:01 +0100 | [diff] [blame] | 428 | mbcs_sram_write(struct file * fp, const char __user *buf, size_t len, loff_t * off) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 429 | { |
| 430 | struct cx_dev *cx_dev = fp->private_data; |
| 431 | struct mbcs_soft *soft = cx_dev->soft; |
| 432 | uint64_t hostAddr; |
| 433 | int rv = 0; |
| 434 | |
| 435 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); |
| 436 | if (hostAddr == 0) |
| 437 | return -ENOMEM; |
| 438 | |
| 439 | if (copy_from_user((void *)hostAddr, buf, len)) { |
| 440 | rv = -EFAULT; |
| 441 | goto exit; |
| 442 | } |
| 443 | |
| 444 | rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off); |
| 445 | |
| 446 | exit: |
| 447 | free_pages(hostAddr, get_order(len)); |
| 448 | |
| 449 | return rv; |
| 450 | } |
| 451 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 452 | static loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 453 | { |
| 454 | loff_t newpos; |
| 455 | |
| 456 | switch (whence) { |
Josef 'Jeff' Sipek | 930ff81 | 2006-09-30 23:27:33 -0700 | [diff] [blame] | 457 | case SEEK_SET: |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 458 | newpos = off; |
| 459 | break; |
| 460 | |
Josef 'Jeff' Sipek | 930ff81 | 2006-09-30 23:27:33 -0700 | [diff] [blame] | 461 | case SEEK_CUR: |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 462 | newpos = filp->f_pos + off; |
| 463 | break; |
| 464 | |
Josef 'Jeff' Sipek | 930ff81 | 2006-09-30 23:27:33 -0700 | [diff] [blame] | 465 | case SEEK_END: |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 466 | newpos = MBCS_SRAM_SIZE + off; |
| 467 | break; |
| 468 | |
| 469 | default: /* can't happen */ |
| 470 | return -EINVAL; |
| 471 | } |
| 472 | |
| 473 | if (newpos < 0) |
| 474 | return -EINVAL; |
| 475 | |
| 476 | filp->f_pos = newpos; |
| 477 | |
| 478 | return newpos; |
| 479 | } |
| 480 | |
| 481 | static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset) |
| 482 | { |
| 483 | uint64_t mmr_base; |
| 484 | |
| 485 | mmr_base = (uint64_t) (soft->mmr_base + offset); |
| 486 | |
| 487 | return mmr_base; |
| 488 | } |
| 489 | |
| 490 | static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft) |
| 491 | { |
| 492 | soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START); |
| 493 | } |
| 494 | |
| 495 | static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft) |
| 496 | { |
| 497 | soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START); |
| 498 | } |
| 499 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 500 | static int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 501 | { |
| 502 | struct cx_dev *cx_dev = fp->private_data; |
| 503 | struct mbcs_soft *soft = cx_dev->soft; |
| 504 | |
| 505 | if (vma->vm_pgoff != 0) |
| 506 | return -EINVAL; |
| 507 | |
| 508 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 509 | |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 510 | /* Remap-pfn-range will mark the range VM_IO */ |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 511 | if (remap_pfn_range(vma, |
| 512 | vma->vm_start, |
| 513 | __pa(soft->gscr_addr) >> PAGE_SHIFT, |
| 514 | PAGE_SIZE, |
| 515 | vma->vm_page_prot)) |
| 516 | return -EAGAIN; |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * mbcs_completion_intr_handler - Primary completion handler. |
| 523 | * @irq: irq |
| 524 | * @arg: soft struct for device |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 525 | * |
| 526 | */ |
| 527 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 528 | mbcs_completion_intr_handler(int irq, void *arg) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 529 | { |
| 530 | struct mbcs_soft *soft = (struct mbcs_soft *)arg; |
| 531 | void *mmr_base; |
| 532 | union cm_status cm_status; |
| 533 | union cm_control cm_control; |
| 534 | |
| 535 | mmr_base = soft->mmr_base; |
| 536 | cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS); |
| 537 | |
| 538 | if (cm_status.rd_dma_done) { |
| 539 | /* stop dma-read engine, clear status */ |
| 540 | cm_control.cm_control_reg = |
| 541 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 542 | cm_control.rd_dma_clr = 1; |
| 543 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, |
| 544 | cm_control.cm_control_reg); |
| 545 | atomic_set(&soft->dmaread_done, 1); |
| 546 | wake_up(&soft->dmaread_queue); |
| 547 | } |
| 548 | if (cm_status.wr_dma_done) { |
| 549 | /* stop dma-write engine, clear status */ |
| 550 | cm_control.cm_control_reg = |
| 551 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 552 | cm_control.wr_dma_clr = 1; |
| 553 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, |
| 554 | cm_control.cm_control_reg); |
| 555 | atomic_set(&soft->dmawrite_done, 1); |
| 556 | wake_up(&soft->dmawrite_queue); |
| 557 | } |
| 558 | if (cm_status.alg_done) { |
| 559 | /* clear status */ |
| 560 | cm_control.cm_control_reg = |
| 561 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 562 | cm_control.alg_done_clr = 1; |
| 563 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, |
| 564 | cm_control.cm_control_reg); |
| 565 | atomic_set(&soft->algo_done, 1); |
| 566 | wake_up(&soft->algo_queue); |
| 567 | } |
| 568 | |
| 569 | return IRQ_HANDLED; |
| 570 | } |
| 571 | |
| 572 | /** |
| 573 | * mbcs_intr_alloc - Allocate interrupts. |
| 574 | * @dev: device pointer |
| 575 | * |
| 576 | */ |
| 577 | static int mbcs_intr_alloc(struct cx_dev *dev) |
| 578 | { |
| 579 | struct sn_irq_info *sn_irq; |
| 580 | struct mbcs_soft *soft; |
| 581 | struct getdma *getdma; |
| 582 | struct putdma *putdma; |
| 583 | struct algoblock *algo; |
| 584 | |
| 585 | soft = dev->soft; |
| 586 | getdma = &soft->getdma; |
| 587 | putdma = &soft->putdma; |
| 588 | algo = &soft->algo; |
| 589 | |
| 590 | soft->get_sn_irq = NULL; |
| 591 | soft->put_sn_irq = NULL; |
| 592 | soft->algo_sn_irq = NULL; |
| 593 | |
| 594 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); |
| 595 | if (sn_irq == NULL) |
| 596 | return -EAGAIN; |
| 597 | soft->get_sn_irq = sn_irq; |
| 598 | getdma->intrHostDest = sn_irq->irq_xtalkaddr; |
| 599 | getdma->intrVector = sn_irq->irq_irq; |
| 600 | if (request_irq(sn_irq->irq_irq, |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 601 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 602 | "MBCS get intr", (void *)soft)) { |
| 603 | tiocx_irq_free(soft->get_sn_irq); |
| 604 | return -EAGAIN; |
| 605 | } |
| 606 | |
| 607 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); |
| 608 | if (sn_irq == NULL) { |
| 609 | free_irq(soft->get_sn_irq->irq_irq, soft); |
| 610 | tiocx_irq_free(soft->get_sn_irq); |
| 611 | return -EAGAIN; |
| 612 | } |
| 613 | soft->put_sn_irq = sn_irq; |
| 614 | putdma->intrHostDest = sn_irq->irq_xtalkaddr; |
| 615 | putdma->intrVector = sn_irq->irq_irq; |
| 616 | if (request_irq(sn_irq->irq_irq, |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 617 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 618 | "MBCS put intr", (void *)soft)) { |
| 619 | tiocx_irq_free(soft->put_sn_irq); |
| 620 | free_irq(soft->get_sn_irq->irq_irq, soft); |
| 621 | tiocx_irq_free(soft->get_sn_irq); |
| 622 | return -EAGAIN; |
| 623 | } |
| 624 | |
| 625 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); |
| 626 | if (sn_irq == NULL) { |
| 627 | free_irq(soft->put_sn_irq->irq_irq, soft); |
| 628 | tiocx_irq_free(soft->put_sn_irq); |
| 629 | free_irq(soft->get_sn_irq->irq_irq, soft); |
| 630 | tiocx_irq_free(soft->get_sn_irq); |
| 631 | return -EAGAIN; |
| 632 | } |
| 633 | soft->algo_sn_irq = sn_irq; |
| 634 | algo->intrHostDest = sn_irq->irq_xtalkaddr; |
| 635 | algo->intrVector = sn_irq->irq_irq; |
| 636 | if (request_irq(sn_irq->irq_irq, |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 637 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 638 | "MBCS algo intr", (void *)soft)) { |
| 639 | tiocx_irq_free(soft->algo_sn_irq); |
| 640 | free_irq(soft->put_sn_irq->irq_irq, soft); |
| 641 | tiocx_irq_free(soft->put_sn_irq); |
| 642 | free_irq(soft->get_sn_irq->irq_irq, soft); |
| 643 | tiocx_irq_free(soft->get_sn_irq); |
| 644 | return -EAGAIN; |
| 645 | } |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * mbcs_intr_dealloc - Remove interrupts. |
| 652 | * @dev: device pointer |
| 653 | * |
| 654 | */ |
| 655 | static void mbcs_intr_dealloc(struct cx_dev *dev) |
| 656 | { |
| 657 | struct mbcs_soft *soft; |
| 658 | |
| 659 | soft = dev->soft; |
| 660 | |
| 661 | free_irq(soft->get_sn_irq->irq_irq, soft); |
| 662 | tiocx_irq_free(soft->get_sn_irq); |
| 663 | free_irq(soft->put_sn_irq->irq_irq, soft); |
| 664 | tiocx_irq_free(soft->put_sn_irq); |
| 665 | free_irq(soft->algo_sn_irq->irq_irq, soft); |
| 666 | tiocx_irq_free(soft->algo_sn_irq); |
| 667 | } |
| 668 | |
| 669 | static inline int mbcs_hw_init(struct mbcs_soft *soft) |
| 670 | { |
| 671 | void *mmr_base = soft->mmr_base; |
| 672 | union cm_control cm_control; |
| 673 | union cm_req_timeout cm_req_timeout; |
| 674 | uint64_t err_stat; |
| 675 | |
| 676 | cm_req_timeout.cm_req_timeout_reg = |
| 677 | MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT); |
| 678 | |
| 679 | cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK; |
| 680 | MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT, |
| 681 | cm_req_timeout.cm_req_timeout_reg); |
| 682 | |
| 683 | mbcs_gscr_pioaddr_set(soft); |
| 684 | mbcs_debug_pioaddr_set(soft); |
| 685 | |
| 686 | /* clear errors */ |
| 687 | err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT); |
| 688 | MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat); |
| 689 | MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1); |
| 690 | |
| 691 | /* enable interrupts */ |
| 692 | /* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */ |
| 693 | MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL); |
| 694 | |
| 695 | /* arm status regs and clear engines */ |
| 696 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); |
| 697 | cm_control.rearm_stat_regs = 1; |
| 698 | cm_control.alg_clr = 1; |
| 699 | cm_control.wr_dma_clr = 1; |
| 700 | cm_control.rd_dma_clr = 1; |
| 701 | |
| 702 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); |
| 703 | |
| 704 | return 0; |
| 705 | } |
| 706 | |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 707 | static ssize_t show_algo(struct device *dev, struct device_attribute *attr, char *buf) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 708 | { |
| 709 | struct cx_dev *cx_dev = to_cx_dev(dev); |
| 710 | struct mbcs_soft *soft = cx_dev->soft; |
| 711 | uint64_t debug0; |
| 712 | |
| 713 | /* |
| 714 | * By convention, the first debug register contains the |
| 715 | * algorithm number and revision. |
| 716 | */ |
| 717 | debug0 = *(uint64_t *) soft->debug_addr; |
| 718 | |
Randy Dunlap | a81a8f5 | 2009-09-04 16:58:05 -0700 | [diff] [blame] | 719 | return sprintf(buf, "0x%x 0x%x\n", |
| 720 | upper_32_bits(debug0), lower_32_bits(debug0)); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 721 | } |
| 722 | |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 723 | static ssize_t store_algo(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 724 | { |
| 725 | int n; |
| 726 | struct cx_dev *cx_dev = to_cx_dev(dev); |
| 727 | struct mbcs_soft *soft = cx_dev->soft; |
| 728 | |
| 729 | if (count <= 0) |
| 730 | return 0; |
| 731 | |
| 732 | n = simple_strtoul(buf, NULL, 0); |
| 733 | |
| 734 | if (n == 1) { |
| 735 | mbcs_algo_start(soft); |
| 736 | if (wait_event_interruptible(soft->algo_queue, |
| 737 | atomic_read(&soft->algo_done))) |
| 738 | return -ERESTARTSYS; |
| 739 | } |
| 740 | |
| 741 | return count; |
| 742 | } |
| 743 | |
| 744 | DEVICE_ATTR(algo, 0644, show_algo, store_algo); |
| 745 | |
| 746 | /** |
| 747 | * mbcs_probe - Initialize for device |
| 748 | * @dev: device pointer |
| 749 | * @device_id: id table pointer |
| 750 | * |
| 751 | */ |
| 752 | static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id) |
| 753 | { |
| 754 | struct mbcs_soft *soft; |
| 755 | |
| 756 | dev->soft = NULL; |
| 757 | |
Pekka Enberg | 82ca76b | 2005-09-06 15:18:35 -0700 | [diff] [blame] | 758 | soft = kzalloc(sizeof(struct mbcs_soft), GFP_KERNEL); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 759 | if (soft == NULL) |
| 760 | return -ENOMEM; |
| 761 | |
| 762 | soft->nasid = dev->cx_id.nasid; |
| 763 | list_add(&soft->list, &soft_list); |
| 764 | soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid); |
| 765 | dev->soft = soft; |
| 766 | soft->cxdev = dev; |
| 767 | |
| 768 | init_waitqueue_head(&soft->dmawrite_queue); |
| 769 | init_waitqueue_head(&soft->dmaread_queue); |
| 770 | init_waitqueue_head(&soft->algo_queue); |
| 771 | |
Matthias Kaehlcke | 46bca69 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 772 | mutex_init(&soft->dmawritelock); |
Matthias Kaehlcke | ae5e297 | 2008-02-07 00:15:25 -0800 | [diff] [blame] | 773 | mutex_init(&soft->dmareadlock); |
Matthias Kaehlcke | a40ba84 | 2008-02-07 00:15:24 -0800 | [diff] [blame] | 774 | mutex_init(&soft->algolock); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 775 | |
| 776 | mbcs_getdma_init(&soft->getdma); |
| 777 | mbcs_putdma_init(&soft->putdma); |
| 778 | mbcs_algo_init(&soft->algo); |
| 779 | |
| 780 | mbcs_hw_init(soft); |
| 781 | |
| 782 | /* Allocate interrupts */ |
| 783 | mbcs_intr_alloc(dev); |
| 784 | |
| 785 | device_create_file(&dev->dev, &dev_attr_algo); |
| 786 | |
| 787 | return 0; |
| 788 | } |
| 789 | |
| 790 | static int mbcs_remove(struct cx_dev *dev) |
| 791 | { |
| 792 | if (dev->soft) { |
| 793 | mbcs_intr_dealloc(dev); |
| 794 | kfree(dev->soft); |
| 795 | } |
| 796 | |
| 797 | device_remove_file(&dev->dev, &dev_attr_algo); |
| 798 | |
| 799 | return 0; |
| 800 | } |
| 801 | |
Andi Kleen | 1849f23 | 2012-10-04 17:11:47 -0700 | [diff] [blame] | 802 | static const struct cx_device_id __devinitconst mbcs_id_table[] = { |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 803 | { |
| 804 | .part_num = MBCS_PART_NUM, |
| 805 | .mfg_num = MBCS_MFG_NUM, |
| 806 | }, |
| 807 | { |
| 808 | .part_num = MBCS_PART_NUM_ALG0, |
| 809 | .mfg_num = MBCS_MFG_NUM, |
| 810 | }, |
| 811 | {0, 0} |
| 812 | }; |
| 813 | |
| 814 | MODULE_DEVICE_TABLE(cx, mbcs_id_table); |
| 815 | |
Alan Cox | 39ef01e | 2007-07-19 01:47:53 -0700 | [diff] [blame] | 816 | static struct cx_drv mbcs_driver = { |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 817 | .name = DEVICE_NAME, |
| 818 | .id_table = mbcs_id_table, |
| 819 | .probe = mbcs_probe, |
| 820 | .remove = mbcs_remove, |
| 821 | }; |
| 822 | |
| 823 | static void __exit mbcs_exit(void) |
| 824 | { |
Akinobu Mita | 68fc4fa | 2007-07-19 01:47:50 -0700 | [diff] [blame] | 825 | unregister_chrdev(mbcs_major, DEVICE_NAME); |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 826 | cx_driver_unregister(&mbcs_driver); |
| 827 | } |
| 828 | |
| 829 | static int __init mbcs_init(void) |
| 830 | { |
| 831 | int rv; |
| 832 | |
Greg Edwards | 96f339c6 | 2005-09-28 17:05:19 -0500 | [diff] [blame] | 833 | if (!ia64_platform_is("sn2")) |
| 834 | return -ENODEV; |
| 835 | |
Bruce Losure | e1e1974 | 2005-04-25 13:09:41 -0700 | [diff] [blame] | 836 | // Put driver into chrdevs[]. Get major number. |
| 837 | rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops); |
| 838 | if (rv < 0) { |
| 839 | DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv); |
| 840 | return rv; |
| 841 | } |
| 842 | mbcs_major = rv; |
| 843 | |
| 844 | return cx_driver_register(&mbcs_driver); |
| 845 | } |
| 846 | |
| 847 | module_init(mbcs_init); |
| 848 | module_exit(mbcs_exit); |
| 849 | |
| 850 | MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>"); |
| 851 | MODULE_DESCRIPTION("Driver for MOATB Core Services"); |
| 852 | MODULE_LICENSE("GPL"); |