From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dongwon Kim Subject: [RFC PATCH 53/60] hyper_dmabuf: define fastpath_export for exporting existing buffer Date: Tue, 19 Dec 2017 11:30:09 -0800 Message-ID: <1513711816-2618-53-git-send-email-dongwon.kim@intel.com> References: <1513711816-2618-1-git-send-email-dongwon.kim@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1513711816-2618-1-git-send-email-dongwon.kim@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xenproject.org, mateuszx.potrola@intel.com, dri-devel@lists.freedesktop.org, dongwon.kim@intel.com List-Id: dri-devel@lists.freedesktop.org VG8gbWFrZSBoeXBlcl9kbWFidWZfZXhwb3J0X3JlbW90ZV9pb2N0bCBtb3JlIGNvbXBhY3QgYW5k IHJlYWRhYmxlLAphIG5ldyBmdW5jdGlvbiBjYWxsLCAnZmFzdHBhdGhfZXhwb3J0JyBpcyBjcmVh dGVkIHRvIHJlcGxhY2UgYSByb3V0aW5lCmluIGh5cGVyX2RtYWJ1Zl9leHBvcnRfcmVtb3RlX2lv Y3RsIGZvciB0aGUgY2FzZSByZXF1ZXN0ZWQgYnVmZmVyIGZvcgpleHBvcnRpbmcgaXMgYWxyZWFk eSBpbiB0aGUgTElTVCAoZXhwb3J0ZWQgcHJldmlvdXNseSkuCgpTaWduZWQtb2ZmLWJ5OiBEb25n d29uIEtpbSA8ZG9uZ3dvbi5raW1AaW50ZWwuY29tPgotLS0KIGRyaXZlcnMveGVuL2h5cGVyX2Rt YWJ1Zi9oeXBlcl9kbWFidWZfaW9jdGwuYyB8IDE1MyArKysrKysrKysrKysrKystLS0tLS0tLS0t LQogMSBmaWxlIGNoYW5nZWQsIDg3IGluc2VydGlvbnMoKyksIDY2IGRlbGV0aW9ucygtKQoKZGlm ZiAtLWdpdCBhL2RyaXZlcnMveGVuL2h5cGVyX2RtYWJ1Zi9oeXBlcl9kbWFidWZfaW9jdGwuYyBi L2RyaXZlcnMveGVuL2h5cGVyX2RtYWJ1Zi9oeXBlcl9kbWFidWZfaW9jdGwuYwppbmRleCBiNDBj Zjg5Li5kMTFmNjA5IDEwMDY0NAotLS0gYS9kcml2ZXJzL3hlbi9oeXBlcl9kbWFidWYvaHlwZXJf ZG1hYnVmX2lvY3RsLmMKKysrIGIvZHJpdmVycy94ZW4vaHlwZXJfZG1hYnVmL2h5cGVyX2RtYWJ1 Zl9pb2N0bC5jCkBAIC0xMjIsNiArMTIyLDgyIEBAIHN0YXRpYyBpbnQgc2VuZF9leHBvcnRfbXNn KHN0cnVjdCBleHBvcnRlZF9zZ3RfaW5mbyAqZXhwb3J0ZWQsCiAJcmV0dXJuIHJldDsKIH0KIAor LyogRmFzdCBwYXRoIGV4cG9ydGluZyByb3V0aW5lIGluIGNhc2Ugc2FtZSBidWZmZXIgaXMgYWxy ZWFkeSBleHBvcnRlZC4KKyAqIEluIHRoaXMgZnVuY3Rpb24sIHdlIHNraXAgbm9ybWFsIGV4cG9y dGluZyBwcm9jZXNzIGFuZCBqdXN0IHVwZGF0ZQorICogcHJpdmF0ZSBkYXRhIG9uIGJvdGggVk1z IChpbXBvcnRlciBhbmQgZXhwb3J0ZXIpCisgKgorICogcmV0dXJuICcxJyBpZiByZWV4cG9ydCBp cyBuZWVkZWQsIHJldHVybiAnMCcgaWYgc3VjY2VlZHMsIHJldHVybgorICogS2VybmVsIGVycm9y IGNvZGUgaWYgc29tZXRoaW5nIGdvZXMgd3JvbmcKKyAqLworc3RhdGljIGludCBmYXN0cGF0aF9l eHBvcnQoaHlwZXJfZG1hYnVmX2lkX3QgaGlkLCBpbnQgc3pfcHJpdiwgY2hhciAqcHJpdikKK3sK KwlpbnQgcmVleHBvcnQgPSAxOworCWludCByZXQgPSAwOworCXN0cnVjdCBleHBvcnRlZF9zZ3Rf aW5mbyAqZXhwb3J0ZWQ7CisKKwlleHBvcnRlZCA9IGh5cGVyX2RtYWJ1Zl9maW5kX2V4cG9ydGVk KGhpZCk7CisKKwlpZiAoIWV4cG9ydGVkKQorCQlyZXR1cm4gcmVleHBvcnQ7CisKKwlpZiAoZXhw b3J0ZWQtPnZhbGlkID09IGZhbHNlKQorCQlyZXR1cm4gcmVleHBvcnQ7CisKKwkvKgorCSAqIENo ZWNrIGlmIHVuZXhwb3J0IGlzIGFscmVhZHkgc2NoZWR1bGVkIGZvciB0aGF0IGJ1ZmZlciwKKwkg KiBpZiBzbyB0cnkgdG8gY2FuY2VsIGl0LiBJZiB0aGF0IHdpbGwgZmFpbCwgYnVmZmVyIG5lZWRz CisJICogdG8gYmUgcmVleHBvcnQgb25jZSBhZ2Fpbi4KKwkgKi8KKwlpZiAoZXhwb3J0ZWQtPnVu ZXhwb3J0X3NjaGVkKSB7CisJCWlmICghY2FuY2VsX2RlbGF5ZWRfd29ya19zeW5jKCZleHBvcnRl ZC0+dW5leHBvcnQpKQorCQkJcmV0dXJuIHJlZXhwb3J0OworCisJCWV4cG9ydGVkLT51bmV4cG9y dF9zY2hlZCA9IGZhbHNlOworCX0KKworCS8qIGlmIHRoZXJlJ3MgYW55IGNoYW5nZSBpbiBzaXpl IG9mIHByaXZhdGUgZGF0YS4KKwkgKiB3ZSByZWFsbG9jYXRlIHNwYWNlIGZvciBwcml2YXRlIGRh dGEgd2l0aCBuZXcgc2l6ZQorCSAqLworCWlmIChzel9wcml2ICE9IGV4cG9ydGVkLT5zel9wcml2 KSB7CisJCWtmcmVlKGV4cG9ydGVkLT5wcml2KTsKKworCQkvKiB0cnVuY2F0aW5nIHNpemUgKi8K KwkJaWYgKHN6X3ByaXYgPiBNQVhfU0laRV9QUklWX0RBVEEpCisJCQlleHBvcnRlZC0+c3pfcHJp diA9IE1BWF9TSVpFX1BSSVZfREFUQTsKKwkJZWxzZQorCQkJZXhwb3J0ZWQtPnN6X3ByaXYgPSBz el9wcml2OworCisJCWV4cG9ydGVkLT5wcml2ID0ga2NhbGxvYygxLCBleHBvcnRlZC0+c3pfcHJp diwKKwkJCQkJIEdGUF9LRVJORUwpOworCisJCWlmICghZXhwb3J0ZWQtPnByaXYpIHsKKwkJCWh5 cGVyX2RtYWJ1Zl9yZW1vdmVfZXhwb3J0ZWQoZXhwb3J0ZWQtPmhpZCk7CisJCQloeXBlcl9kbWFi dWZfY2xlYW51cF9zZ3RfaW5mbyhleHBvcnRlZCwgdHJ1ZSk7CisJCQlrZnJlZShleHBvcnRlZCk7 CisJCQlyZXR1cm4gLUVOT01FTTsKKwkJfQorCX0KKworCS8qIHVwZGF0ZSBwcml2YXRlIGRhdGEg aW4gc2d0X2luZm8gd2l0aCBuZXcgb25lcyAqLworCXJldCA9IGNvcHlfZnJvbV91c2VyKGV4cG9y dGVkLT5wcml2LCBwcml2LCBleHBvcnRlZC0+c3pfcHJpdik7CisJaWYgKHJldCkgeworCQlkZXZf ZXJyKGh5X2Rydl9wcml2LT5kZXYsCisJCQkiRmFpbGVkIHRvIGxvYWQgYSBuZXcgcHJpdmF0ZSBk YXRhXG4iKTsKKwkJcmV0ID0gLUVJTlZBTDsKKwl9IGVsc2UgeworCQkvKiBzZW5kIGFuIGV4cG9y dCBtc2cgZm9yIHVwZGF0aW5nIHByaXYgaW4gaW1wb3J0ZXIgKi8KKwkJcmV0ID0gc2VuZF9leHBv cnRfbXNnKGV4cG9ydGVkLCBOVUxMKTsKKworCQlpZiAocmV0IDwgMCkgeworCQkJZGV2X2Vyciho eV9kcnZfcHJpdi0+ZGV2LAorCQkJCSJGYWlsZWQgdG8gc2VuZCBhIG5ldyBwcml2YXRlIGRhdGFc biIpOworCQkJcmV0ID0gLUVCVVNZOworCQl9CisJfQorCisJcmV0dXJuIHJldDsKK30KKwogc3Rh dGljIGludCBoeXBlcl9kbWFidWZfZXhwb3J0X3JlbW90ZV9pb2N0bChzdHJ1Y3QgZmlsZSAqZmls cCwgdm9pZCAqZGF0YSkKIHsKIAlzdHJ1Y3QgaW9jdGxfaHlwZXJfZG1hYnVmX2V4cG9ydF9yZW1v dGUgKmV4cG9ydF9yZW1vdGVfYXR0ciA9CkBAIC0xNTMsNzkgKzIyOSwyNCBAQCBzdGF0aWMgaW50 IGh5cGVyX2RtYWJ1Zl9leHBvcnRfcmVtb3RlX2lvY3RsKHN0cnVjdCBmaWxlICpmaWxwLCB2b2lk ICpkYXRhKQogCSAqLwogCWhpZCA9IGh5cGVyX2RtYWJ1Zl9maW5kX2hpZF9leHBvcnRlZChkbWFf YnVmLAogCQkJCQkgICAgIGV4cG9ydF9yZW1vdGVfYXR0ci0+cmVtb3RlX2RvbWFpbik7Ci0JaWYg KGhpZC5pZCAhPSAtMSkgewotCQlleHBvcnRlZCA9IGh5cGVyX2RtYWJ1Zl9maW5kX2V4cG9ydGVk KGhpZCk7CiAKLQkJaWYgKCFleHBvcnRlZCkKLQkJCWdvdG8gcmVleHBvcnQ7Ci0KLQkJaWYgKGV4 cG9ydGVkLT52YWxpZCA9PSBmYWxzZSkKLQkJCWdvdG8gcmVleHBvcnQ7CisJaWYgKGhpZC5pZCAh PSAtMSkgeworCQlyZXQgPSBmYXN0cGF0aF9leHBvcnQoaGlkLCBleHBvcnRfcmVtb3RlX2F0dHIt PnN6X3ByaXYsCisJCQkJICAgICAgZXhwb3J0X3JlbW90ZV9hdHRyLT5wcml2KTsKIAotCQkvKgot CQkgKiBDaGVjayBpZiB1bmV4cG9ydCBpcyBhbHJlYWR5IHNjaGVkdWxlZCBmb3IgdGhhdCBidWZm ZXIsCi0JCSAqIGlmIHNvIHRyeSB0byBjYW5jZWwgaXQuIElmIHRoYXQgd2lsbCBmYWlsLCBidWZm ZXIgbmVlZHMKLQkJICogdG8gYmUgcmVleHBvcnQgb25jZSBhZ2Fpbi4KKwkJLyogcmV0dXJuIGlm IGZhc3RwYXRoX2V4cG9ydCBzdWNjZWVkcyBvcgorCQkgKiBnZXRzIHNvbWUgZmF0YWwgZXJyb3IK IAkJICovCi0JCWlmIChleHBvcnRlZC0+dW5leHBvcnRfc2NoZWQpIHsKLQkJCWlmICghY2FuY2Vs X2RlbGF5ZWRfd29ya19zeW5jKCZleHBvcnRlZC0+dW5leHBvcnQpKSB7Ci0JCQkJZG1hX2J1Zl9w dXQoZG1hX2J1Zik7Ci0JCQkJZ290byByZWV4cG9ydDsKLQkJCX0KLQkJCWV4cG9ydGVkLT51bmV4 cG9ydF9zY2hlZCA9IGZhbHNlOworCQlpZiAocmV0IDw9IDApIHsKKwkJCWRtYV9idWZfcHV0KGRt YV9idWYpOworCQkJZXhwb3J0X3JlbW90ZV9hdHRyLT5oaWQgPSBoaWQ7CisJCQlyZXR1cm4gcmV0 OwogCQl9Ci0KLQkJLyogaWYgdGhlcmUncyBhbnkgY2hhbmdlIGluIHNpemUgb2YgcHJpdmF0ZSBk YXRhLgotCQkgKiB3ZSByZWFsbG9jYXRlIHNwYWNlIGZvciBwcml2YXRlIGRhdGEgd2l0aCBuZXcg c2l6ZQotCQkgKi8KLQkJaWYgKGV4cG9ydF9yZW1vdGVfYXR0ci0+c3pfcHJpdiAhPSBleHBvcnRl ZC0+c3pfcHJpdikgewotCQkJa2ZyZWUoZXhwb3J0ZWQtPnByaXYpOwotCi0JCQkvKiB0cnVuY2F0 aW5nIHNpemUgKi8KLQkJCWlmIChleHBvcnRfcmVtb3RlX2F0dHItPnN6X3ByaXYgPiBNQVhfU0la RV9QUklWX0RBVEEpCi0JCQkJZXhwb3J0ZWQtPnN6X3ByaXYgPSBNQVhfU0laRV9QUklWX0RBVEE7 Ci0JCQllbHNlCi0JCQkJZXhwb3J0ZWQtPnN6X3ByaXYgPSBleHBvcnRfcmVtb3RlX2F0dHItPnN6 X3ByaXY7Ci0KLQkJCWV4cG9ydGVkLT5wcml2ID0ga2NhbGxvYygxLCBleHBvcnRlZC0+c3pfcHJp diwKLQkJCQkJCSBHRlBfS0VSTkVMKTsKLQotCQkJaWYgKCFleHBvcnRlZC0+cHJpdikgewotCQkJ CWh5cGVyX2RtYWJ1Zl9yZW1vdmVfZXhwb3J0ZWQoZXhwb3J0ZWQtPmhpZCk7Ci0JCQkJaHlwZXJf ZG1hYnVmX2NsZWFudXBfc2d0X2luZm8oZXhwb3J0ZWQsIHRydWUpOwotCQkJCWtmcmVlKGV4cG9y dGVkKTsKLQkJCQlkbWFfYnVmX3B1dChkbWFfYnVmKTsKLQkJCQlyZXR1cm4gLUVOT01FTTsKLQkJ CX0KLQkJfQotCi0JCS8qIHVwZGF0ZSBwcml2YXRlIGRhdGEgaW4gc2d0X2luZm8gd2l0aCBuZXcg b25lcyAqLwotCQlyZXQgPSBjb3B5X2Zyb21fdXNlcihleHBvcnRlZC0+cHJpdiwgZXhwb3J0X3Jl bW90ZV9hdHRyLT5wcml2LAotCQkJCSAgICAgZXhwb3J0ZWQtPnN6X3ByaXYpOwotCQlpZiAocmV0 KSB7Ci0JCQlkZXZfZXJyKGh5X2Rydl9wcml2LT5kZXYsCi0JCQkJIkZhaWxlZCB0byBsb2FkIGEg bmV3IHByaXZhdGUgZGF0YVxuIik7Ci0JCQlyZXQgPSAtRUlOVkFMOwotCQl9IGVsc2UgewotCQkJ Lyogc2VuZCBhbiBleHBvcnQgbXNnIGZvciB1cGRhdGluZyBwcml2IGluIGltcG9ydGVyICovCi0J CQlyZXQgPSBzZW5kX2V4cG9ydF9tc2coZXhwb3J0ZWQsIE5VTEwpOwotCi0JCQlpZiAocmV0IDwg MCkgewotCQkJCWRldl9lcnIoaHlfZHJ2X3ByaXYtPmRldiwKLQkJCQkJIkZhaWxlZCB0byBzZW5k IGEgbmV3IHByaXZhdGUgZGF0YVxuIik7Ci0JCQkJcmV0ID0gLUVCVVNZOwotCQkJfQotCQl9Ci0K LQkJZG1hX2J1Zl9wdXQoZG1hX2J1Zik7Ci0JCWV4cG9ydF9yZW1vdGVfYXR0ci0+aGlkID0gaGlk OwotCQlyZXR1cm4gcmV0OwogCX0KIAotcmVleHBvcnQ6CiAJYXR0YWNobWVudCA9IGRtYV9idWZf YXR0YWNoKGRtYV9idWYsIGh5X2Rydl9wcml2LT5kZXYpOwogCWlmIChJU19FUlIoYXR0YWNobWVu dCkpIHsKLQkJZGV2X2VycihoeV9kcnZfcHJpdi0+ZGV2LCAiQ2Fubm90IGdldCBhdHRhY2htZW50 XG4iKTsKKwkJZGV2X2VycihoeV9kcnZfcHJpdi0+ZGV2LCAiY2Fubm90IGdldCBhdHRhY2htZW50 XG4iKTsKIAkJcmV0ID0gUFRSX0VSUihhdHRhY2htZW50KTsKIAkJZ290byBmYWlsX2F0dGFjaDsK IAl9CkBAIC0yMzMsNyArMjU0LDcgQEAgc3RhdGljIGludCBoeXBlcl9kbWFidWZfZXhwb3J0X3Jl bW90ZV9pb2N0bChzdHJ1Y3QgZmlsZSAqZmlscCwgdm9pZCAqZGF0YSkKIAlzZ3QgPSBkbWFfYnVm X21hcF9hdHRhY2htZW50KGF0dGFjaG1lbnQsIERNQV9CSURJUkVDVElPTkFMKTsKIAogCWlmIChJ U19FUlIoc2d0KSkgewotCQlkZXZfZXJyKGh5X2Rydl9wcml2LT5kZXYsICJDYW5ub3QgbWFwIGF0 dGFjaG1lbnRcbiIpOworCQlkZXZfZXJyKGh5X2Rydl9wcml2LT5kZXYsICJjYW5ub3QgbWFwIGF0 dGFjaG1lbnRcbiIpOwogCQlyZXQgPSBQVFJfRVJSKHNndCk7CiAJCWdvdG8gZmFpbF9tYXBfYXR0 YWNobWVudDsKIAl9Ci0tIAoyLjcuNAoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhl bnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5m by94ZW4tZGV2ZWw=