Commit ea222485 authored by Chandramohan Akula's avatar Chandramohan Akula Committed by Jason Gunthorpe
Browse files

RDMA/bnxt_re: Update alloc_page uapi for pacing 

Update the alloc_page uapi functionality for handling the
mapping of doorbell pacing shared page and bar address.

Link: https://lore.kernel.org/r/1689742977-9128-6-git-send-email-selvin.xavier@broadcom.com


Signed-off-by: default avatarChandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent fa8fad92

drivers/infiniband/hw/bnxt_re/ib_verbs.c

+32 −3
Original line number Diff line number Diff line
@@ -565,6 +565,8 @@ bnxt_re_mmap_entry_insert(struct bnxt_re_ucontext *uctx, u64 mem_offset, 
		break;

	case BNXT_RE_MMAP_UC_DB:

	case BNXT_RE_MMAP_WC_DB:

	case BNXT_RE_MMAP_DBR_BAR:

	case BNXT_RE_MMAP_DBR_PAGE:

		ret = rdma_user_mmap_entry_insert(&uctx->ib_uctx,

						  &entry->rdma_entry, PAGE_SIZE);

		break;
@@ -4149,6 +4151,19 @@ int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma) 
	case BNXT_RE_MMAP_SH_PAGE:

		ret = vm_insert_page(vma, vma->vm_start, virt_to_page(uctx->shpg));

		break;

	case BNXT_RE_MMAP_DBR_BAR:

		pfn = bnxt_entry->mem_offset >> PAGE_SHIFT;

		ret = rdma_user_mmap_io(ib_uctx, vma, pfn, PAGE_SIZE,

					pgprot_noncached(vma->vm_page_prot),

					rdma_entry);

		break;

	case BNXT_RE_MMAP_DBR_PAGE:

		/* Driver doesn't expect write access for user space */

		if (vma->vm_flags & VM_WRITE)

			return -EFAULT;

		ret = vm_insert_page(vma, vma->vm_start,

				     virt_to_page((void *)bnxt_entry->mem_offset));

		break;

	default:

		ret = -EINVAL;

		break;
@@ -4180,7 +4195,7 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_ALLOC_PAGE)(struct uverbs_attr_bundle * 
	u64 mmap_offset;

	u32 length;

	u32 dpi;

	u64 dbr;

	u64 addr;

	int err;



	uctx = container_of(ib_uverbs_get_ucontext(attrs), struct bnxt_re_ucontext, ib_uctx);
@@ -4202,19 +4217,30 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_ALLOC_PAGE)(struct uverbs_attr_bundle * 
				return -ENOMEM;

			length = PAGE_SIZE;

			dpi = uctx->wcdpi.dpi;

			dbr = (u64)uctx->wcdpi.umdbr;

			addr = (u64)uctx->wcdpi.umdbr;

			mmap_flag = BNXT_RE_MMAP_WC_DB;

		} else {

			return -EINVAL;

		}



		break;

	case BNXT_RE_ALLOC_DBR_BAR_PAGE:

		length = PAGE_SIZE;

		addr = (u64)rdev->pacing.dbr_bar_addr;

		mmap_flag = BNXT_RE_MMAP_DBR_BAR;

		break;



	case BNXT_RE_ALLOC_DBR_PAGE:

		length = PAGE_SIZE;

		addr = (u64)rdev->pacing.dbr_page;

		mmap_flag = BNXT_RE_MMAP_DBR_PAGE;

		break;



	default:

		return -EOPNOTSUPP;

	}



	entry = bnxt_re_mmap_entry_insert(uctx, dbr, mmap_flag, &mmap_offset);

	entry = bnxt_re_mmap_entry_insert(uctx, addr, mmap_flag, &mmap_offset);

	if (!entry)

		return -ENOMEM;
@@ -4254,6 +4280,9 @@ static int alloc_page_obj_cleanup(struct ib_uobject *uobject, 
			uctx->wcdpi.dbr = NULL;

		}

		break;

	case BNXT_RE_MMAP_DBR_BAR:

	case BNXT_RE_MMAP_DBR_PAGE:

		break;

	default:

		goto exit;

	}

drivers/infiniband/hw/bnxt_re/ib_verbs.h

+2 −0
Original line number Diff line number Diff line
@@ -146,6 +146,8 @@ enum bnxt_re_mmap_flag { 
	BNXT_RE_MMAP_SH_PAGE,

	BNXT_RE_MMAP_UC_DB,

	BNXT_RE_MMAP_WC_DB,

	BNXT_RE_MMAP_DBR_PAGE,

	BNXT_RE_MMAP_DBR_BAR,

};



struct bnxt_re_user_mmap_entry {

include/uapi/rdma/bnxt_re-abi.h

+2 −0
Original line number Diff line number Diff line
@@ -136,6 +136,8 @@ enum bnxt_re_objects { 


enum bnxt_re_alloc_page_type {

	BNXT_RE_ALLOC_WC_PAGE = 0,

	BNXT_RE_ALLOC_DBR_BAR_PAGE,

	BNXT_RE_ALLOC_DBR_PAGE,

};



enum bnxt_re_var_alloc_page_attrs {