From owner-svn-src-all@freebsd.org Wed May 8 10:29:46 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C01D515A42EC; Wed, 8 May 2019 10:29:46 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6754B9596F; Wed, 8 May 2019 10:29:46 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 3E38D488E; Wed, 8 May 2019 10:29:46 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x48ATkmb039347; Wed, 8 May 2019 10:29:46 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x48ATk5B039346; Wed, 8 May 2019 10:29:46 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201905081029.x48ATk5B039346@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Wed, 8 May 2019 10:29:46 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r347251 - head/sys/dev/mlx5/mlx5_ib X-SVN-Group: head X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: head/sys/dev/mlx5/mlx5_ib X-SVN-Commit-Revision: 347251 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6754B9596F X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.95)[-0.954,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 May 2019 10:29:47 -0000 Author: hselasky Date: Wed May 8 10:29:45 2019 New Revision: 347251 URL: https://svnweb.freebsd.org/changeset/base/347251 Log: Import Linux code to implement mlx5_ib_disassociate_ucontext() in mlx5ib. Submitted by: kib@ MFC after: 3 days Sponsored by: Mellanox Technologies Modified: head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c Modified: head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c ============================================================================== --- head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c Wed May 8 10:28:18 2019 (r347250) +++ head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c Wed May 8 10:29:45 2019 (r347251) @@ -1335,6 +1335,70 @@ static int mlx5_ib_set_vma_data(struct vm_area_struct return 0; } +static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) +{ + int ret; + struct vm_area_struct *vma; + struct mlx5_ib_vma_private_data *vma_private, *n; + struct mlx5_ib_ucontext *context = to_mucontext(ibcontext); + struct task_struct *owning_process = NULL; + struct mm_struct *owning_mm = NULL; + + owning_process = get_pid_task(ibcontext->tgid, PIDTYPE_PID); + if (!owning_process) + return; + + owning_mm = get_task_mm(owning_process); + if (!owning_mm) { + pr_info("no mm, disassociate ucontext is pending task termination\n"); + while (1) { + put_task_struct(owning_process); + usleep_range(1000, 2000); + owning_process = get_pid_task(ibcontext->tgid, + PIDTYPE_PID); + if (!owning_process || owning_process->task_thread-> + td_proc->p_state == PRS_ZOMBIE) { + pr_info("disassociate ucontext done, task was terminated\n"); + /* in case task was dead need to release the + * task struct. + */ + if (owning_process) + put_task_struct(owning_process); + return; + } + } + } + + /* need to protect from a race on closing the vma as part of + * mlx5_ib_vma_close. + */ + down_write(&owning_mm->mmap_sem); + list_for_each_entry_safe(vma_private, n, &context->vma_private_list, + list) { + vma = vma_private->vma; + ret = zap_vma_ptes(vma, vma->vm_start, + PAGE_SIZE); + if (ret == -ENOTSUP) { + if (bootverbose) + WARN_ONCE( + "%s: zap_vma_ptes not implemented for unmanaged mappings", __func__); + } else { + WARN(ret, "%s: zap_vma_ptes failed, error %d", + __func__, -ret); + } + /* context going to be destroyed, should + * not access ops any more. + */ + /* XXXKIB vma->vm_flags &= ~(VM_SHARED | VM_MAYSHARE); */ + vma->vm_ops = NULL; + list_del(&vma_private->list); + kfree(vma_private); + } + up_write(&owning_mm->mmap_sem); + mmput(owning_mm); + put_task_struct(owning_process); +} + static inline char *mmap_cmd2str(enum mlx5_ib_mmap_cmd cmd) { switch (cmd) { @@ -3083,6 +3147,8 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev) dev->ib_dev.get_vf_stats = mlx5_ib_get_vf_stats; dev->ib_dev.set_vf_guid = mlx5_ib_set_vf_guid; } + + dev->ib_dev.disassociate_ucontext = mlx5_ib_disassociate_ucontext; mlx5_ib_internal_fill_odp_caps(dev);