From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226/izMTnQXFwfT7P5YpHnlH9aDwa+o2Kog+LPiQKK/4n0NcnFiV7aS5TJl0QnVGZRghrbDz ARC-Seal: i=1; a=rsa-sha256; t=1517591041; cv=none; d=google.com; s=arc-20160816; b=GQtsYZ5gb5Ca/YN3ul44HKhUsMyMLf8+7a+DfYOdpUmiz+bknwPX9H6UWCphRA+rsD Pf6FeD/LL8oUqYRueMi3Nix1rsSp0PWZTrpcO9M4wVIo+7kQfMJIa1UdhZ3pgc8Pkbsc jTEzcMpQpPKV0zqjy8J/sH4H47szC0QPa6jzpGFTsB/IhxAQGyWZ81d73Kk2EwA4K4w9 n/XBFr/xHo5Eqqq7JrsPrwU3cMwjmWJ5CVPImLNbfy1617J89G3zVhTqkAS1j4dMTkR4 NDQOKbQWU6QUwHMS/3DWyVZFPuiS2Im+r8H+BIo5YKHnCrTUCuIest94MZIrMGKM1Pq1 QoNg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=kRFKkvY3ne7zdefsjKQCbshrFyOhQYrz1ONv8RK7Kkk=; b=rBW0mRgygOtxbKJJhndH8R5DY9Y32OY8stoI44iGHgLjgfa7kL0LTpw0bjwu1RqUrR z8+9SUZ/luiq88u0nYgIeHked4TuXi430WLiSuBQQbOWD6X4LJJk8vZ0PNOuEPEFfnQj GUozKNjrU44Bp27Eyi+NIZ2xSyfBUfDp3Kmefb6eVMEcLquhgnfIuYAqau86QaUEsfMR tNeMfArVzFpEULIAx8mjcLl1iFKFddjjc6F4lIxRqq/amAceYCj7m1yz2GRoiY4op7Zu YI5mbOTdvuz9Ai9rB9FRwS6SIz2h5YhdsL99RgyB7zdiEILlmFwxs5KovNua9GJCuSVr Q48A== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, shaoyun liu , Felix Kuehling , Oded Gabbay , Sasha Levin Subject: [PATCH 4.9 31/86] drm/amdkfd: Fix SDMA oversubsription handling Date: Fri, 2 Feb 2018 17:57:51 +0100 Message-Id: <20180202140825.428756966@linuxfoundation.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180202140822.679101338@linuxfoundation.org> References: <20180202140822.679101338@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1591309437743981845?= X-GMAIL-MSGID: =?utf-8?q?1591309544295343691?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felix Kuehling [ Upstream commit 8c946b8988acec785bcf67088b6bd0747f36d2d3 ] SDMA only supports a fixed number of queues. HWS cannot handle oversubscription. Signed-off-by: shaoyun liu Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c | 18 +++++++++++++++++ 1 file changed, 18 insertions(+) --- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c @@ -205,6 +205,24 @@ int pqm_create_queue(struct process_queu switch (type) { case KFD_QUEUE_TYPE_SDMA: + if (dev->dqm->queue_count >= + CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) { + pr_err("Over-subscription is not allowed for SDMA.\n"); + retval = -EPERM; + goto err_create_queue; + } + + retval = create_cp_queue(pqm, dev, &q, properties, f, *qid); + if (retval != 0) + goto err_create_queue; + pqn->q = q; + pqn->kq = NULL; + retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, + &q->properties.vmid); + pr_debug("DQM returned %d for create_queue\n", retval); + print_queue(q); + break; + case KFD_QUEUE_TYPE_COMPUTE: /* check if there is over subscription */ if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&