diff options
author | Selvin Xavier <selvin.xavier@broadcom.com> | 2023-06-13 21:12:17 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-06-21 20:13:17 +0300 |
commit | 24ce94782c4878fe25ff15d8c08088a6ca5810e1 (patch) | |
tree | 18248326df4cc1de0d2087822332d47812f98370 /drivers/infiniband/hw/bnxt_re/ib_verbs.c | |
parent | 147394dbe1237ef1f2da528c238633215f7193e1 (diff) | |
download | linux-24ce94782c4878fe25ff15d8c08088a6ca5810e1.tar.xz |
RDMA/bnxt_re: Use the common mmap helper functions
Replace the mmap handling function with common code in IB core. Create
rdma_user_mmap_entry for each mmap resource and add to the ib_core mmap
list. Add mmap_free verb support. Also, use rdma_user_mmap_io while
mapping Doorbell pages.
Link: https://lore.kernel.org/r/1686679943-17117-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/ib_verbs.c')
-rw-r--r-- | drivers/infiniband/hw/bnxt_re/ib_verbs.c | 125 |
1 files changed, 102 insertions, 23 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index 053afc9f1256..136133099a3f 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -533,12 +533,55 @@ fail: return rc; } +static struct bnxt_re_user_mmap_entry* +bnxt_re_mmap_entry_insert(struct bnxt_re_ucontext *uctx, u64 mem_offset, + enum bnxt_re_mmap_flag mmap_flag, u64 *offset) +{ + struct bnxt_re_user_mmap_entry *entry; + int ret; + + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return NULL; + + entry->mem_offset = mem_offset; + entry->mmap_flag = mmap_flag; + + switch (mmap_flag) { + case BNXT_RE_MMAP_SH_PAGE: + ret = rdma_user_mmap_entry_insert_exact(&uctx->ib_uctx, + &entry->rdma_entry, PAGE_SIZE, 0); + break; + case BNXT_RE_MMAP_UC_DB: + ret = rdma_user_mmap_entry_insert(&uctx->ib_uctx, + &entry->rdma_entry, PAGE_SIZE); + break; + default: + ret = -EINVAL; + break; + } + + if (ret) { + kfree(entry); + return NULL; + } + if (offset) + *offset = rdma_user_mmap_get_offset(&entry->rdma_entry); + + return entry; +} + /* Protection Domains */ int bnxt_re_dealloc_pd(struct ib_pd *ib_pd, struct ib_udata *udata) { struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd); struct bnxt_re_dev *rdev = pd->rdev; + if (udata) { + rdma_user_mmap_entry_remove(pd->pd_db_mmap); + pd->pd_db_mmap = NULL; + } + bnxt_re_destroy_fence_mr(pd); if (pd->qplib_pd.id) { @@ -557,7 +600,8 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) struct bnxt_re_ucontext *ucntx = rdma_udata_to_drv_context( udata, struct bnxt_re_ucontext, ib_uctx); struct bnxt_re_pd *pd = container_of(ibpd, struct bnxt_re_pd, ib_pd); - int rc; + struct bnxt_re_user_mmap_entry *entry = NULL; + int rc = 0; pd->rdev = rdev; if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) { @@ -567,7 +611,7 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) } if (udata) { - struct bnxt_re_pd_resp resp; + struct bnxt_re_pd_resp resp = {}; if (!ucntx->dpi.dbr) { /* Allocate DPI in alloc_pd to avoid failing of @@ -584,12 +628,21 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) resp.pdid = pd->qplib_pd.id; /* Still allow mapping this DBR to the new user PD. */ resp.dpi = ucntx->dpi.dpi; - resp.dbr = (u64)ucntx->dpi.umdbr; - rc = ib_copy_to_udata(udata, &resp, sizeof(resp)); + entry = bnxt_re_mmap_entry_insert(ucntx, (u64)ucntx->dpi.umdbr, + BNXT_RE_MMAP_UC_DB, &resp.dbr); + + if (!entry) { + rc = -ENOMEM; + goto dbfail; + } + + pd->pd_db_mmap = &entry->rdma_entry; + + rc = ib_copy_to_udata(udata, &resp, min(sizeof(resp), udata->outlen)); if (rc) { - ibdev_err(&rdev->ibdev, - "Failed to copy user response\n"); + rdma_user_mmap_entry_remove(pd->pd_db_mmap); + rc = -EFAULT; goto dbfail; } } @@ -3964,6 +4017,7 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata) container_of(ctx, struct bnxt_re_ucontext, ib_uctx); struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev); struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr; + struct bnxt_re_user_mmap_entry *entry; struct bnxt_re_uctx_resp resp = {}; u32 chip_met_rev_num = 0; int rc; @@ -4002,6 +4056,13 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata) resp.comp_mask |= BNXT_RE_UCNTX_CMASK_HAVE_MODE; resp.mode = rdev->chip_ctx->modes.wqe_mode; + entry = bnxt_re_mmap_entry_insert(uctx, 0, BNXT_RE_MMAP_SH_PAGE, NULL); + if (!entry) { + rc = -ENOMEM; + goto cfail; + } + uctx->shpage_mmap = &entry->rdma_entry; + rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp))); if (rc) { ibdev_err(ibdev, "Failed to copy user context"); @@ -4025,6 +4086,8 @@ void bnxt_re_dealloc_ucontext(struct ib_ucontext *ib_uctx) struct bnxt_re_dev *rdev = uctx->rdev; + rdma_user_mmap_entry_remove(uctx->shpage_mmap); + uctx->shpage_mmap = NULL; if (uctx->shpg) free_page((unsigned long)uctx->shpg); @@ -4044,27 +4107,43 @@ int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma) struct bnxt_re_ucontext *uctx = container_of(ib_uctx, struct bnxt_re_ucontext, ib_uctx); - struct bnxt_re_dev *rdev = uctx->rdev; + struct bnxt_re_user_mmap_entry *bnxt_entry; + struct rdma_user_mmap_entry *rdma_entry; + int ret = 0; u64 pfn; - if (vma->vm_end - vma->vm_start != PAGE_SIZE) + rdma_entry = rdma_user_mmap_entry_get(&uctx->ib_uctx, vma); + if (!rdma_entry) return -EINVAL; - if (vma->vm_pgoff) { - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, - PAGE_SIZE, vma->vm_page_prot)) { - ibdev_err(&rdev->ibdev, "Failed to map DPI"); - return -EAGAIN; - } - } else { - pfn = virt_to_phys(uctx->shpg) >> PAGE_SHIFT; - if (remap_pfn_range(vma, vma->vm_start, - pfn, PAGE_SIZE, vma->vm_page_prot)) { - ibdev_err(&rdev->ibdev, "Failed to map shared page"); - return -EAGAIN; - } + bnxt_entry = container_of(rdma_entry, struct bnxt_re_user_mmap_entry, + rdma_entry); + + switch (bnxt_entry->mmap_flag) { + case BNXT_RE_MMAP_UC_DB: + 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_SH_PAGE: + ret = vm_insert_page(vma, vma->vm_start, virt_to_page(uctx->shpg)); + break; + default: + ret = -EINVAL; + break; } - return 0; + rdma_user_mmap_entry_put(rdma_entry); + return ret; +} + +void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry) +{ + struct bnxt_re_user_mmap_entry *bnxt_entry; + + bnxt_entry = container_of(rdma_entry, struct bnxt_re_user_mmap_entry, + rdma_entry); + + kfree(bnxt_entry); } |