diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2010-09-13 20:23:57 +0400 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-09-28 21:46:35 +0400 |
| commit | c6d7b26791a2aefdf97f2af1e93161ed05acd631 (patch) | |
| tree | 61b9b3af001fe5983aa84034d20e44eb43c039a8 /drivers/infiniband/hw/cxgb4/provider.c | |
| parent | aadc4df3087a33ca7fc37f91a024e7b7efdafa75 (diff) | |
| download | linux-c6d7b26791a2aefdf97f2af1e93161ed05acd631.tar.xz | |
RDMA/cxgb4: Support on-chip SQs
T4 support on-chip SQs to reduce latency. This patch adds support for
this in iw_cxgb4:
- Manage ocqp memory like other adapter mem resources.
- Allocate user mode SQs from ocqp mem if available.
- Map ocqp mem to user process using write combining.
- Map PCIE_MA_SYNC reg to user process.
Bump uverbs ABI.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/provider.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/provider.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/infiniband/hw/cxgb4/provider.c b/drivers/infiniband/hw/cxgb4/provider.c index 8f645c83a125..a49a9c1275a3 100644 --- a/drivers/infiniband/hw/cxgb4/provider.c +++ b/drivers/infiniband/hw/cxgb4/provider.c @@ -149,19 +149,28 @@ static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) addr = mm->addr; kfree(mm); - if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) && - (addr < (pci_resource_start(rdev->lldi.pdev, 2) + - pci_resource_len(rdev->lldi.pdev, 2)))) { + if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) && + (addr < (pci_resource_start(rdev->lldi.pdev, 0) + + pci_resource_len(rdev->lldi.pdev, 0)))) { /* - * Map T4 DB register. + * MA_SYNC register... */ - if (vma->vm_flags & VM_READ) - return -EPERM; - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; - vma->vm_flags &= ~VM_MAYREAD; + ret = io_remap_pfn_range(vma, vma->vm_start, + addr >> PAGE_SHIFT, + len, vma->vm_page_prot); + } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) && + (addr < (pci_resource_start(rdev->lldi.pdev, 2) + + pci_resource_len(rdev->lldi.pdev, 2)))) { + + /* + * Map user DB or OCQP memory... + */ + if (addr >= rdev->oc_mw_pa) + vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot); + else + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ret = io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT, len, vma->vm_page_prot); @@ -472,6 +481,7 @@ int c4iw_register_device(struct c4iw_dev *dev) dev->ibdev.post_send = c4iw_post_send; dev->ibdev.post_recv = c4iw_post_receive; dev->ibdev.get_protocol_stats = c4iw_get_mib; + dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION; dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL); if (!dev->ibdev.iwcm) |