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author | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
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committer | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
commit | 23930fa1cebfea6f79881c588ccd1b0781e49e3f (patch) | |
tree | 36d29e3f83661c4f5f45b6f74ac0d5f9886867a8 /drivers/infiniband/hw/ehca/ehca_uverbs.c | |
parent | 36b35a5be0e4b406acd816e2122d153e875105be (diff) | |
parent | 4f5537de7c1531398e84e18a24f667e49cc94208 (diff) | |
download | kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.zip kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.gz kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.bz2 |
Merge branch 'master' into upstream
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_uverbs.c')
-rw-r--r-- | drivers/infiniband/hw/ehca/ehca_uverbs.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_uverbs.c b/drivers/infiniband/hw/ehca/ehca_uverbs.c new file mode 100644 index 0000000..e08764e --- /dev/null +++ b/drivers/infiniband/hw/ehca/ehca_uverbs.c @@ -0,0 +1,392 @@ +/* + * IBM eServer eHCA Infiniband device driver for Linux on POWER + * + * userspace support verbs + * + * Authors: Christoph Raisch <raisch@de.ibm.com> + * Hoang-Nam Nguyen <hnguyen@de.ibm.com> + * Heiko J Schick <schickhj@de.ibm.com> + * + * Copyright (c) 2005 IBM Corporation + * + * All rights reserved. + * + * This source code is distributed under a dual license of GPL v2.0 and OpenIB + * BSD. + * + * OpenIB BSD License + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <asm/current.h> + +#include "ehca_classes.h" +#include "ehca_iverbs.h" +#include "ehca_mrmw.h" +#include "ehca_tools.h" +#include "hcp_if.h" + +struct ib_ucontext *ehca_alloc_ucontext(struct ib_device *device, + struct ib_udata *udata) +{ + struct ehca_ucontext *my_context; + + my_context = kzalloc(sizeof *my_context, GFP_KERNEL); + if (!my_context) { + ehca_err(device, "Out of memory device=%p", device); + return ERR_PTR(-ENOMEM); + } + + return &my_context->ib_ucontext; +} + +int ehca_dealloc_ucontext(struct ib_ucontext *context) +{ + kfree(container_of(context, struct ehca_ucontext, ib_ucontext)); + return 0; +} + +struct page *ehca_nopage(struct vm_area_struct *vma, + unsigned long address, int *type) +{ + struct page *mypage = NULL; + u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT; + u32 idr_handle = fileoffset >> 32; + u32 q_type = (fileoffset >> 28) & 0xF; /* CQ, QP,... */ + u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */ + u32 cur_pid = current->tgid; + unsigned long flags; + struct ehca_cq *cq; + struct ehca_qp *qp; + struct ehca_pd *pd; + u64 offset; + void *vaddr; + + switch (q_type) { + case 1: /* CQ */ + spin_lock_irqsave(&ehca_cq_idr_lock, flags); + cq = idr_find(&ehca_cq_idr, idr_handle); + spin_unlock_irqrestore(&ehca_cq_idr_lock, flags); + + /* make sure this mmap really belongs to the authorized user */ + if (!cq) { + ehca_gen_err("cq is NULL ret=NOPAGE_SIGBUS"); + return NOPAGE_SIGBUS; + } + + if (cq->ownpid != cur_pid) { + ehca_err(cq->ib_cq.device, + "Invalid caller pid=%x ownpid=%x", + cur_pid, cq->ownpid); + return NOPAGE_SIGBUS; + } + + if (rsrc_type == 2) { + ehca_dbg(cq->ib_cq.device, "cq=%p cq queuearea", cq); + offset = address - vma->vm_start; + vaddr = ipz_qeit_calc(&cq->ipz_queue, offset); + ehca_dbg(cq->ib_cq.device, "offset=%lx vaddr=%p", + offset, vaddr); + mypage = virt_to_page(vaddr); + } + break; + + case 2: /* QP */ + spin_lock_irqsave(&ehca_qp_idr_lock, flags); + qp = idr_find(&ehca_qp_idr, idr_handle); + spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); + + /* make sure this mmap really belongs to the authorized user */ + if (!qp) { + ehca_gen_err("qp is NULL ret=NOPAGE_SIGBUS"); + return NOPAGE_SIGBUS; + } + + pd = container_of(qp->ib_qp.pd, struct ehca_pd, ib_pd); + if (pd->ownpid != cur_pid) { + ehca_err(qp->ib_qp.device, + "Invalid caller pid=%x ownpid=%x", + cur_pid, pd->ownpid); + return NOPAGE_SIGBUS; + } + + if (rsrc_type == 2) { /* rqueue */ + ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueuearea", qp); + offset = address - vma->vm_start; + vaddr = ipz_qeit_calc(&qp->ipz_rqueue, offset); + ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p", + offset, vaddr); + mypage = virt_to_page(vaddr); + } else if (rsrc_type == 3) { /* squeue */ + ehca_dbg(qp->ib_qp.device, "qp=%p qp squeuearea", qp); + offset = address - vma->vm_start; + vaddr = ipz_qeit_calc(&qp->ipz_squeue, offset); + ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p", + offset, vaddr); + mypage = virt_to_page(vaddr); + } + break; + + default: + ehca_gen_err("bad queue type %x", q_type); + return NOPAGE_SIGBUS; + } + + if (!mypage) { + ehca_gen_err("Invalid page adr==NULL ret=NOPAGE_SIGBUS"); + return NOPAGE_SIGBUS; + } + get_page(mypage); + + return mypage; +} + +static struct vm_operations_struct ehcau_vm_ops = { + .nopage = ehca_nopage, +}; + +int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) +{ + u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT; + u32 idr_handle = fileoffset >> 32; + u32 q_type = (fileoffset >> 28) & 0xF; /* CQ, QP,... */ + u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */ + u32 cur_pid = current->tgid; + u32 ret; + u64 vsize, physical; + unsigned long flags; + struct ehca_cq *cq; + struct ehca_qp *qp; + struct ehca_pd *pd; + + switch (q_type) { + case 1: /* CQ */ + spin_lock_irqsave(&ehca_cq_idr_lock, flags); + cq = idr_find(&ehca_cq_idr, idr_handle); + spin_unlock_irqrestore(&ehca_cq_idr_lock, flags); + + /* make sure this mmap really belongs to the authorized user */ + if (!cq) + return -EINVAL; + + if (cq->ownpid != cur_pid) { + ehca_err(cq->ib_cq.device, + "Invalid caller pid=%x ownpid=%x", + cur_pid, cq->ownpid); + return -ENOMEM; + } + + if (!cq->ib_cq.uobject || cq->ib_cq.uobject->context != context) + return -EINVAL; + + switch (rsrc_type) { + case 1: /* galpa fw handle */ + ehca_dbg(cq->ib_cq.device, "cq=%p cq triggerarea", cq); + vma->vm_flags |= VM_RESERVED; + vsize = vma->vm_end - vma->vm_start; + if (vsize != EHCA_PAGESIZE) { + ehca_err(cq->ib_cq.device, "invalid vsize=%lx", + vma->vm_end - vma->vm_start); + return -EINVAL; + } + + physical = cq->galpas.user.fw_handle; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + vma->vm_flags |= VM_IO | VM_RESERVED; + + ehca_dbg(cq->ib_cq.device, + "vsize=%lx physical=%lx", vsize, physical); + ret = remap_pfn_range(vma, vma->vm_start, + physical >> PAGE_SHIFT, vsize, + vma->vm_page_prot); + if (ret) { + ehca_err(cq->ib_cq.device, + "remap_pfn_range() failed ret=%x", + ret); + return -ENOMEM; + } + break; + + case 2: /* cq queue_addr */ + ehca_dbg(cq->ib_cq.device, "cq=%p cq q_addr", cq); + vma->vm_flags |= VM_RESERVED; + vma->vm_ops = &ehcau_vm_ops; + break; + + default: + ehca_err(cq->ib_cq.device, "bad resource type %x", + rsrc_type); + return -EINVAL; + } + break; + + case 2: /* QP */ + spin_lock_irqsave(&ehca_qp_idr_lock, flags); + qp = idr_find(&ehca_qp_idr, idr_handle); + spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); + + /* make sure this mmap really belongs to the authorized user */ + if (!qp) + return -EINVAL; + + pd = container_of(qp->ib_qp.pd, struct ehca_pd, ib_pd); + if (pd->ownpid != cur_pid) { + ehca_err(qp->ib_qp.device, + "Invalid caller pid=%x ownpid=%x", + cur_pid, pd->ownpid); + return -ENOMEM; + } + + if (!qp->ib_qp.uobject || qp->ib_qp.uobject->context != context) + return -EINVAL; + + switch (rsrc_type) { + case 1: /* galpa fw handle */ + ehca_dbg(qp->ib_qp.device, "qp=%p qp triggerarea", qp); + vma->vm_flags |= VM_RESERVED; + vsize = vma->vm_end - vma->vm_start; + if (vsize != EHCA_PAGESIZE) { + ehca_err(qp->ib_qp.device, "invalid vsize=%lx", + vma->vm_end - vma->vm_start); + return -EINVAL; + } + + physical = qp->galpas.user.fw_handle; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + vma->vm_flags |= VM_IO | VM_RESERVED; + + ehca_dbg(qp->ib_qp.device, "vsize=%lx physical=%lx", + vsize, physical); + ret = remap_pfn_range(vma, vma->vm_start, + physical >> PAGE_SHIFT, vsize, + vma->vm_page_prot); + if (ret) { + ehca_err(qp->ib_qp.device, + "remap_pfn_range() failed ret=%x", + ret); + return -ENOMEM; + } + break; + + case 2: /* qp rqueue_addr */ + ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueue_addr", qp); + vma->vm_flags |= VM_RESERVED; + vma->vm_ops = &ehcau_vm_ops; + break; + + case 3: /* qp squeue_addr */ + ehca_dbg(qp->ib_qp.device, "qp=%p qp squeue_addr", qp); + vma->vm_flags |= VM_RESERVED; + vma->vm_ops = &ehcau_vm_ops; + break; + + default: + ehca_err(qp->ib_qp.device, "bad resource type %x", + rsrc_type); + return -EINVAL; + } + break; + + default: + ehca_gen_err("bad queue type %x", q_type); + return -EINVAL; + } + + return 0; +} + +int ehca_mmap_nopage(u64 foffset, u64 length, void **mapped, + struct vm_area_struct **vma) +{ + down_write(¤t->mm->mmap_sem); + *mapped = (void*)do_mmap(NULL,0, length, PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, + foffset); + up_write(¤t->mm->mmap_sem); + if (!(*mapped)) { + ehca_gen_err("couldn't mmap foffset=%lx length=%lx", + foffset, length); + return -EINVAL; + } + + *vma = find_vma(current->mm, (u64)*mapped); + if (!(*vma)) { + down_write(¤t->mm->mmap_sem); + do_munmap(current->mm, 0, length); + up_write(¤t->mm->mmap_sem); + ehca_gen_err("couldn't find vma queue=%p", *mapped); + return -EINVAL; + } + (*vma)->vm_flags |= VM_RESERVED; + (*vma)->vm_ops = &ehcau_vm_ops; + + return 0; +} + +int ehca_mmap_register(u64 physical, void **mapped, + struct vm_area_struct **vma) +{ + int ret; + unsigned long vsize; + /* ehca hw supports only 4k page */ + ret = ehca_mmap_nopage(0, EHCA_PAGESIZE, mapped, vma); + if (ret) { + ehca_gen_err("could'nt mmap physical=%lx", physical); + return ret; + } + + (*vma)->vm_flags |= VM_RESERVED; + vsize = (*vma)->vm_end - (*vma)->vm_start; + if (vsize != EHCA_PAGESIZE) { + ehca_gen_err("invalid vsize=%lx", + (*vma)->vm_end - (*vma)->vm_start); + return -EINVAL; + } + + (*vma)->vm_page_prot = pgprot_noncached((*vma)->vm_page_prot); + (*vma)->vm_flags |= VM_IO | VM_RESERVED; + + ret = remap_pfn_range((*vma), (*vma)->vm_start, + physical >> PAGE_SHIFT, vsize, + (*vma)->vm_page_prot); + if (ret) { + ehca_gen_err("remap_pfn_range() failed ret=%x", ret); + return -ENOMEM; + } + + return 0; + +} + +int ehca_munmap(unsigned long addr, size_t len) { + int ret = 0; + struct mm_struct *mm = current->mm; + if (mm) { + down_write(&mm->mmap_sem); + ret = do_munmap(mm, addr, len); + up_write(&mm->mmap_sem); + } + return ret; +} |