Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER |
| 3 | * |
| 4 | * userspace support verbs |
| 5 | * |
| 6 | * Authors: Christoph Raisch <raisch@de.ibm.com> |
| 7 | * Hoang-Nam Nguyen <hnguyen@de.ibm.com> |
| 8 | * Heiko J Schick <schickhj@de.ibm.com> |
| 9 | * |
| 10 | * Copyright (c) 2005 IBM Corporation |
| 11 | * |
| 12 | * All rights reserved. |
| 13 | * |
| 14 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB |
| 15 | * BSD. |
| 16 | * |
| 17 | * OpenIB BSD License |
| 18 | * |
| 19 | * Redistribution and use in source and binary forms, with or without |
| 20 | * modification, are permitted provided that the following conditions are met: |
| 21 | * |
| 22 | * Redistributions of source code must retain the above copyright notice, this |
| 23 | * list of conditions and the following disclaimer. |
| 24 | * |
| 25 | * Redistributions in binary form must reproduce the above copyright notice, |
| 26 | * this list of conditions and the following disclaimer in the documentation |
| 27 | * and/or other materials |
| 28 | * provided with the distribution. |
| 29 | * |
| 30 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 31 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 33 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 34 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 35 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 36 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 37 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| 38 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 39 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 40 | * POSSIBILITY OF SUCH DAMAGE. |
| 41 | */ |
| 42 | |
| 43 | #include <asm/current.h> |
| 44 | |
| 45 | #include "ehca_classes.h" |
| 46 | #include "ehca_iverbs.h" |
| 47 | #include "ehca_mrmw.h" |
| 48 | #include "ehca_tools.h" |
| 49 | #include "hcp_if.h" |
| 50 | |
| 51 | struct ib_ucontext *ehca_alloc_ucontext(struct ib_device *device, |
| 52 | struct ib_udata *udata) |
| 53 | { |
| 54 | struct ehca_ucontext *my_context; |
| 55 | |
| 56 | my_context = kzalloc(sizeof *my_context, GFP_KERNEL); |
| 57 | if (!my_context) { |
| 58 | ehca_err(device, "Out of memory device=%p", device); |
| 59 | return ERR_PTR(-ENOMEM); |
| 60 | } |
| 61 | |
| 62 | return &my_context->ib_ucontext; |
| 63 | } |
| 64 | |
| 65 | int ehca_dealloc_ucontext(struct ib_ucontext *context) |
| 66 | { |
| 67 | kfree(container_of(context, struct ehca_ucontext, ib_ucontext)); |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | struct page *ehca_nopage(struct vm_area_struct *vma, |
| 72 | unsigned long address, int *type) |
| 73 | { |
| 74 | struct page *mypage = NULL; |
| 75 | u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT; |
| 76 | u32 idr_handle = fileoffset >> 32; |
| 77 | u32 q_type = (fileoffset >> 28) & 0xF; /* CQ, QP,... */ |
| 78 | u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */ |
| 79 | u32 cur_pid = current->tgid; |
| 80 | unsigned long flags; |
| 81 | struct ehca_cq *cq; |
| 82 | struct ehca_qp *qp; |
| 83 | struct ehca_pd *pd; |
| 84 | u64 offset; |
| 85 | void *vaddr; |
| 86 | |
| 87 | switch (q_type) { |
| 88 | case 1: /* CQ */ |
| 89 | spin_lock_irqsave(&ehca_cq_idr_lock, flags); |
| 90 | cq = idr_find(&ehca_cq_idr, idr_handle); |
| 91 | spin_unlock_irqrestore(&ehca_cq_idr_lock, flags); |
| 92 | |
| 93 | /* make sure this mmap really belongs to the authorized user */ |
| 94 | if (!cq) { |
| 95 | ehca_gen_err("cq is NULL ret=NOPAGE_SIGBUS"); |
| 96 | return NOPAGE_SIGBUS; |
| 97 | } |
| 98 | |
| 99 | if (cq->ownpid != cur_pid) { |
| 100 | ehca_err(cq->ib_cq.device, |
| 101 | "Invalid caller pid=%x ownpid=%x", |
| 102 | cur_pid, cq->ownpid); |
| 103 | return NOPAGE_SIGBUS; |
| 104 | } |
| 105 | |
| 106 | if (rsrc_type == 2) { |
| 107 | ehca_dbg(cq->ib_cq.device, "cq=%p cq queuearea", cq); |
| 108 | offset = address - vma->vm_start; |
| 109 | vaddr = ipz_qeit_calc(&cq->ipz_queue, offset); |
| 110 | ehca_dbg(cq->ib_cq.device, "offset=%lx vaddr=%p", |
| 111 | offset, vaddr); |
| 112 | mypage = virt_to_page(vaddr); |
| 113 | } |
| 114 | break; |
| 115 | |
| 116 | case 2: /* QP */ |
| 117 | spin_lock_irqsave(&ehca_qp_idr_lock, flags); |
| 118 | qp = idr_find(&ehca_qp_idr, idr_handle); |
| 119 | spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); |
| 120 | |
| 121 | /* make sure this mmap really belongs to the authorized user */ |
| 122 | if (!qp) { |
| 123 | ehca_gen_err("qp is NULL ret=NOPAGE_SIGBUS"); |
| 124 | return NOPAGE_SIGBUS; |
| 125 | } |
| 126 | |
| 127 | pd = container_of(qp->ib_qp.pd, struct ehca_pd, ib_pd); |
| 128 | if (pd->ownpid != cur_pid) { |
| 129 | ehca_err(qp->ib_qp.device, |
| 130 | "Invalid caller pid=%x ownpid=%x", |
| 131 | cur_pid, pd->ownpid); |
| 132 | return NOPAGE_SIGBUS; |
| 133 | } |
| 134 | |
| 135 | if (rsrc_type == 2) { /* rqueue */ |
| 136 | ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueuearea", qp); |
| 137 | offset = address - vma->vm_start; |
| 138 | vaddr = ipz_qeit_calc(&qp->ipz_rqueue, offset); |
| 139 | ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p", |
| 140 | offset, vaddr); |
| 141 | mypage = virt_to_page(vaddr); |
| 142 | } else if (rsrc_type == 3) { /* squeue */ |
| 143 | ehca_dbg(qp->ib_qp.device, "qp=%p qp squeuearea", qp); |
| 144 | offset = address - vma->vm_start; |
| 145 | vaddr = ipz_qeit_calc(&qp->ipz_squeue, offset); |
| 146 | ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p", |
| 147 | offset, vaddr); |
| 148 | mypage = virt_to_page(vaddr); |
| 149 | } |
| 150 | break; |
| 151 | |
| 152 | default: |
| 153 | ehca_gen_err("bad queue type %x", q_type); |
| 154 | return NOPAGE_SIGBUS; |
| 155 | } |
| 156 | |
| 157 | if (!mypage) { |
| 158 | ehca_gen_err("Invalid page adr==NULL ret=NOPAGE_SIGBUS"); |
| 159 | return NOPAGE_SIGBUS; |
| 160 | } |
| 161 | get_page(mypage); |
| 162 | |
| 163 | return mypage; |
| 164 | } |
| 165 | |
| 166 | static struct vm_operations_struct ehcau_vm_ops = { |
| 167 | .nopage = ehca_nopage, |
| 168 | }; |
| 169 | |
| 170 | int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) |
| 171 | { |
| 172 | u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT; |
| 173 | u32 idr_handle = fileoffset >> 32; |
| 174 | u32 q_type = (fileoffset >> 28) & 0xF; /* CQ, QP,... */ |
| 175 | u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */ |
| 176 | u32 cur_pid = current->tgid; |
| 177 | u32 ret; |
| 178 | u64 vsize, physical; |
| 179 | unsigned long flags; |
| 180 | struct ehca_cq *cq; |
| 181 | struct ehca_qp *qp; |
| 182 | struct ehca_pd *pd; |
| 183 | |
| 184 | switch (q_type) { |
| 185 | case 1: /* CQ */ |
| 186 | spin_lock_irqsave(&ehca_cq_idr_lock, flags); |
| 187 | cq = idr_find(&ehca_cq_idr, idr_handle); |
| 188 | spin_unlock_irqrestore(&ehca_cq_idr_lock, flags); |
| 189 | |
| 190 | /* make sure this mmap really belongs to the authorized user */ |
| 191 | if (!cq) |
| 192 | return -EINVAL; |
| 193 | |
| 194 | if (cq->ownpid != cur_pid) { |
| 195 | ehca_err(cq->ib_cq.device, |
| 196 | "Invalid caller pid=%x ownpid=%x", |
| 197 | cur_pid, cq->ownpid); |
| 198 | return -ENOMEM; |
| 199 | } |
| 200 | |
| 201 | if (!cq->ib_cq.uobject || cq->ib_cq.uobject->context != context) |
| 202 | return -EINVAL; |
| 203 | |
| 204 | switch (rsrc_type) { |
| 205 | case 1: /* galpa fw handle */ |
| 206 | ehca_dbg(cq->ib_cq.device, "cq=%p cq triggerarea", cq); |
| 207 | vma->vm_flags |= VM_RESERVED; |
| 208 | vsize = vma->vm_end - vma->vm_start; |
| 209 | if (vsize != EHCA_PAGESIZE) { |
| 210 | ehca_err(cq->ib_cq.device, "invalid vsize=%lx", |
| 211 | vma->vm_end - vma->vm_start); |
| 212 | return -EINVAL; |
| 213 | } |
| 214 | |
| 215 | physical = cq->galpas.user.fw_handle; |
| 216 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 217 | vma->vm_flags |= VM_IO | VM_RESERVED; |
| 218 | |
| 219 | ehca_dbg(cq->ib_cq.device, |
| 220 | "vsize=%lx physical=%lx", vsize, physical); |
| 221 | ret = remap_pfn_range(vma, vma->vm_start, |
| 222 | physical >> PAGE_SHIFT, vsize, |
| 223 | vma->vm_page_prot); |
| 224 | if (ret) { |
| 225 | ehca_err(cq->ib_cq.device, |
| 226 | "remap_pfn_range() failed ret=%x", |
| 227 | ret); |
| 228 | return -ENOMEM; |
| 229 | } |
| 230 | break; |
| 231 | |
| 232 | case 2: /* cq queue_addr */ |
| 233 | ehca_dbg(cq->ib_cq.device, "cq=%p cq q_addr", cq); |
| 234 | vma->vm_flags |= VM_RESERVED; |
| 235 | vma->vm_ops = &ehcau_vm_ops; |
| 236 | break; |
| 237 | |
| 238 | default: |
| 239 | ehca_err(cq->ib_cq.device, "bad resource type %x", |
| 240 | rsrc_type); |
| 241 | return -EINVAL; |
| 242 | } |
| 243 | break; |
| 244 | |
| 245 | case 2: /* QP */ |
| 246 | spin_lock_irqsave(&ehca_qp_idr_lock, flags); |
| 247 | qp = idr_find(&ehca_qp_idr, idr_handle); |
| 248 | spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); |
| 249 | |
| 250 | /* make sure this mmap really belongs to the authorized user */ |
| 251 | if (!qp) |
| 252 | return -EINVAL; |
| 253 | |
| 254 | pd = container_of(qp->ib_qp.pd, struct ehca_pd, ib_pd); |
| 255 | if (pd->ownpid != cur_pid) { |
| 256 | ehca_err(qp->ib_qp.device, |
| 257 | "Invalid caller pid=%x ownpid=%x", |
| 258 | cur_pid, pd->ownpid); |
| 259 | return -ENOMEM; |
| 260 | } |
| 261 | |
| 262 | if (!qp->ib_qp.uobject || qp->ib_qp.uobject->context != context) |
| 263 | return -EINVAL; |
| 264 | |
| 265 | switch (rsrc_type) { |
| 266 | case 1: /* galpa fw handle */ |
| 267 | ehca_dbg(qp->ib_qp.device, "qp=%p qp triggerarea", qp); |
| 268 | vma->vm_flags |= VM_RESERVED; |
| 269 | vsize = vma->vm_end - vma->vm_start; |
| 270 | if (vsize != EHCA_PAGESIZE) { |
| 271 | ehca_err(qp->ib_qp.device, "invalid vsize=%lx", |
| 272 | vma->vm_end - vma->vm_start); |
| 273 | return -EINVAL; |
| 274 | } |
| 275 | |
| 276 | physical = qp->galpas.user.fw_handle; |
| 277 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 278 | vma->vm_flags |= VM_IO | VM_RESERVED; |
| 279 | |
| 280 | ehca_dbg(qp->ib_qp.device, "vsize=%lx physical=%lx", |
| 281 | vsize, physical); |
| 282 | ret = remap_pfn_range(vma, vma->vm_start, |
| 283 | physical >> PAGE_SHIFT, vsize, |
| 284 | vma->vm_page_prot); |
| 285 | if (ret) { |
| 286 | ehca_err(qp->ib_qp.device, |
| 287 | "remap_pfn_range() failed ret=%x", |
| 288 | ret); |
| 289 | return -ENOMEM; |
| 290 | } |
| 291 | break; |
| 292 | |
| 293 | case 2: /* qp rqueue_addr */ |
| 294 | ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueue_addr", qp); |
| 295 | vma->vm_flags |= VM_RESERVED; |
| 296 | vma->vm_ops = &ehcau_vm_ops; |
| 297 | break; |
| 298 | |
| 299 | case 3: /* qp squeue_addr */ |
| 300 | ehca_dbg(qp->ib_qp.device, "qp=%p qp squeue_addr", qp); |
| 301 | vma->vm_flags |= VM_RESERVED; |
| 302 | vma->vm_ops = &ehcau_vm_ops; |
| 303 | break; |
| 304 | |
| 305 | default: |
| 306 | ehca_err(qp->ib_qp.device, "bad resource type %x", |
| 307 | rsrc_type); |
| 308 | return -EINVAL; |
| 309 | } |
| 310 | break; |
| 311 | |
| 312 | default: |
| 313 | ehca_gen_err("bad queue type %x", q_type); |
| 314 | return -EINVAL; |
| 315 | } |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | int ehca_mmap_nopage(u64 foffset, u64 length, void **mapped, |
| 321 | struct vm_area_struct **vma) |
| 322 | { |
| 323 | down_write(¤t->mm->mmap_sem); |
| 324 | *mapped = (void*)do_mmap(NULL,0, length, PROT_WRITE, |
| 325 | MAP_SHARED | MAP_ANONYMOUS, |
| 326 | foffset); |
| 327 | up_write(¤t->mm->mmap_sem); |
| 328 | if (!(*mapped)) { |
| 329 | ehca_gen_err("couldn't mmap foffset=%lx length=%lx", |
| 330 | foffset, length); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | *vma = find_vma(current->mm, (u64)*mapped); |
| 335 | if (!(*vma)) { |
| 336 | down_write(¤t->mm->mmap_sem); |
| 337 | do_munmap(current->mm, 0, length); |
| 338 | up_write(¤t->mm->mmap_sem); |
| 339 | ehca_gen_err("couldn't find vma queue=%p", *mapped); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | (*vma)->vm_flags |= VM_RESERVED; |
| 343 | (*vma)->vm_ops = &ehcau_vm_ops; |
| 344 | |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | int ehca_mmap_register(u64 physical, void **mapped, |
| 349 | struct vm_area_struct **vma) |
| 350 | { |
| 351 | int ret; |
| 352 | unsigned long vsize; |
| 353 | /* ehca hw supports only 4k page */ |
| 354 | ret = ehca_mmap_nopage(0, EHCA_PAGESIZE, mapped, vma); |
| 355 | if (ret) { |
| 356 | ehca_gen_err("could'nt mmap physical=%lx", physical); |
| 357 | return ret; |
| 358 | } |
| 359 | |
| 360 | (*vma)->vm_flags |= VM_RESERVED; |
| 361 | vsize = (*vma)->vm_end - (*vma)->vm_start; |
| 362 | if (vsize != EHCA_PAGESIZE) { |
| 363 | ehca_gen_err("invalid vsize=%lx", |
| 364 | (*vma)->vm_end - (*vma)->vm_start); |
| 365 | return -EINVAL; |
| 366 | } |
| 367 | |
| 368 | (*vma)->vm_page_prot = pgprot_noncached((*vma)->vm_page_prot); |
| 369 | (*vma)->vm_flags |= VM_IO | VM_RESERVED; |
| 370 | |
| 371 | ret = remap_pfn_range((*vma), (*vma)->vm_start, |
| 372 | physical >> PAGE_SHIFT, vsize, |
| 373 | (*vma)->vm_page_prot); |
| 374 | if (ret) { |
| 375 | ehca_gen_err("remap_pfn_range() failed ret=%x", ret); |
| 376 | return -ENOMEM; |
| 377 | } |
| 378 | |
| 379 | return 0; |
| 380 | |
| 381 | } |
| 382 | |
| 383 | int ehca_munmap(unsigned long addr, size_t len) { |
| 384 | int ret = 0; |
| 385 | struct mm_struct *mm = current->mm; |
| 386 | if (mm) { |
| 387 | down_write(&mm->mmap_sem); |
| 388 | ret = do_munmap(mm, addr, len); |
| 389 | up_write(&mm->mmap_sem); |
| 390 | } |
| 391 | return ret; |
| 392 | } |