diff options
| author |   Mitko Haralanov <mitko.haralanov@intel.com> | 2016-03-08 11:15:39 -0800 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2016-03-21 15:55:25 -0400 |
| commit | a7922f7ddf023c93b0c409d7a3557fdf0b5ce343 (patch) | |
| tree | 7a08a061e16ef47368ef221d7cb0c8252fb6f9cb /drivers/staging | |
| parent | IB/hfi1: Specify mm when releasing pages (diff) | |
| download | linux-dev-a7922f7ddf023c93b0c409d7a3557fdf0b5ce343.tar.xz linux-dev-a7922f7ddf023c93b0c409d7a3557fdf0b5ce343.zip | |
IB/hfi1: Switch to using the pin query function
Use the new function to query whether the expected receive
user buffer can be pinned successfully. This requires that
a new variable be added to the hfi1_filedata structure used
to hold the number of pages pinned by the expected receive
code.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/rdma/hfi1/hfi.h | 1 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/user_exp_rcv.c | 8 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h index 3dc644d92e3a..16cbdc4073e0 100644 --- a/drivers/staging/rdma/hfi1/hfi.h +++ b/drivers/staging/rdma/hfi1/hfi.h @@ -1190,6 +1190,7 @@ struct hfi1_filedata { struct hfi1_user_sdma_pkt_q *pq; /* for cpu affinity; -1 if none */ int rec_cpu_num; + u32 tid_n_pinned; struct rb_root tid_rb_root; struct tid_rb_node **entry_to_rb; spinlock_t tid_lock; /* protect tid_[limit,used] counters */ diff --git a/drivers/staging/rdma/hfi1/user_exp_rcv.c b/drivers/staging/rdma/hfi1/user_exp_rcv.c index 591605a13243..0861e095df8d 100644 --- a/drivers/staging/rdma/hfi1/user_exp_rcv.c +++ b/drivers/staging/rdma/hfi1/user_exp_rcv.c @@ -396,11 +396,14 @@ int hfi1_user_exp_rcv_setup(struct file *fp, struct hfi1_tid_info *tinfo) * pages, accept the amount pinned so far and program only that. * User space knows how to deal with partially programmed buffers. */ + if (!hfi1_can_pin_pages(dd, fd->tid_n_pinned, npages)) + return -ENOMEM; pinned = hfi1_acquire_user_pages(vaddr, npages, true, pages); if (pinned <= 0) { ret = pinned; goto bail; } + fd->tid_n_pinned += npages; /* Find sets of physically contiguous pages */ npagesets = find_phys_blocks(pages, pinned, pagesets); @@ -549,10 +552,12 @@ nomem: * If not everything was mapped (due to insufficient RcvArray entries, * for example), unpin all unmapped pages so we can pin them nex time. */ - if (mapped_pages != pinned) + if (mapped_pages != pinned) { hfi1_release_user_pages(current->mm, &pages[mapped_pages], pinned - mapped_pages, false); + fd->tid_n_pinned -= pinned - mapped_pages; + } bail: kfree(pagesets); kfree(pages); @@ -924,6 +929,7 @@ static void clear_tid_node(struct hfi1_filedata *fd, u16 subctxt, pci_unmap_single(dd->pcidev, node->dma_addr, node->mmu.len, PCI_DMA_FROMDEVICE); hfi1_release_user_pages(current->mm, node->pages, node->npages, true); + fd->tid_n_pinned -= node->npages; node->grp->used--; node->grp->map &= ~(1 << (node->rcventry - node->grp->base)); |