From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v3,1/2] dmaengine: doc: Add sections for per descriptor metadata support From: Peter Ujfalusi Message-Id: <20180912064512.27306-2-peter.ujfalusi@ti.com> Date: Wed, 12 Sep 2018 09:45:11 +0300 To: dan.j.williams@intel.com, vkoul@kernel.org Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, lars@metafoo.de, radheys@xilinx.com List-ID: VXBkYXRlIHRoZSBwcm92aWRlciBhbmQgY2xpZW50IGRvY3VtZW50YXRpb24gd2l0aCBkZXRhaWxz IGFib3V0IHRoZQptZXRhZGF0YSBzdXBwb3J0LgoKU2lnbmVkLW9mZi1ieTogUGV0ZXIgVWpmYWx1 c2kgPHBldGVyLnVqZmFsdXNpQHRpLmNvbT4KLS0tCiBEb2N1bWVudGF0aW9uL2RyaXZlci1hcGkv ZG1hZW5naW5lL2NsaWVudC5yc3QgfCA3NSArKysrKysrKysrKysrKysrKysrCiAuLi4vZHJpdmVy LWFwaS9kbWFlbmdpbmUvcHJvdmlkZXIucnN0ICAgICAgICAgfCA0NiArKysrKysrKysrKysKIDIg ZmlsZXMgY2hhbmdlZCwgMTIxIGluc2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9Eb2N1bWVudGF0 aW9uL2RyaXZlci1hcGkvZG1hZW5naW5lL2NsaWVudC5yc3QgYi9Eb2N1bWVudGF0aW9uL2RyaXZl ci1hcGkvZG1hZW5naW5lL2NsaWVudC5yc3QKaW5kZXggZmJiYjI4MzFmMjlmLi4wMjc2ZGRhZTdl YTIgMTAwNjQ0Ci0tLSBhL0RvY3VtZW50YXRpb24vZHJpdmVyLWFwaS9kbWFlbmdpbmUvY2xpZW50 LnJzdAorKysgYi9Eb2N1bWVudGF0aW9uL2RyaXZlci1hcGkvZG1hZW5naW5lL2NsaWVudC5yc3QK QEAgLTE1MSw2ICsxNTEsODEgQEAgVGhlIGRldGFpbHMgb2YgdGhlc2Ugb3BlcmF0aW9ucyBhcmU6 CiAgICAgIE5vdGUgdGhhdCBjYWxsYmFja3Mgd2lsbCBhbHdheXMgYmUgaW52b2tlZCBmcm9tIHRo ZSBETUEKICAgICAgZW5naW5lcyB0YXNrbGV0LCBuZXZlciBmcm9tIGludGVycnVwdCBjb250ZXh0 LgogCisgIE9wdGlvbmFsOiBwZXIgZGVzY3JpcHRvciBtZXRhZGF0YQorICAtLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0KKyAgRE1BZW5naW5lIHByb3ZpZGVzIHR3byB3YXlzIGZvciBt ZXRhZGF0YSBzdXBwb3J0LgorCisgIERFU0NfTUVUQURBVEFfQ0xJRU5UCisKKyAgICBUaGUgbWV0 YWRhdGEgYnVmZmVyIGlzIGFsbG9jYXRlZC9wcm92aWRlZCBieSB0aGUgY2xpZW50IGRyaXZlciBh bmQgaXQgaXMKKyAgICBhdHRhY2hlZCB0byB0aGUgZGVzY3JpcHRvci4KKworICAuLiBjb2RlLWJs b2NrOjogYworCisgICAgIGludCBkbWFlbmdpbmVfZGVzY19hdHRhY2hfbWV0YWRhdGEoc3RydWN0 IGRtYV9hc3luY190eF9kZXNjcmlwdG9yICpkZXNjLAorCQkJCSAgIHZvaWQgKmRhdGEsIHNpemVf dCBsZW4pOworCisgIERFU0NfTUVUQURBVEFfRU5HSU5FCisKKyAgICBUaGUgbWV0YWRhdGEgYnVm ZmVyIGlzIGFsbG9jYXRlZC9tYW5hZ2VkIGJ5IHRoZSBETUEgZHJpdmVyLiBUaGUgY2xpZW50Cisg ICAgZHJpdmVyIGNhbiBhc2sgZm9yIHRoZSBwb2ludGVyLCBtYXhpbXVtIHNpemUgYW5kIHRoZSBj dXJyZW50bHkgdXNlZCBzaXplIG9mCisgICAgdGhlIG1ldGFkYXRhIGFuZCBjYW4gZGlyZWN0bHkg dXBkYXRlIG9yIHJlYWQgaXQuCisKKyAgLi4gY29kZS1ibG9jazo6IGMKKworICAgICB2b2lkICpk bWFlbmdpbmVfZGVzY19nZXRfbWV0YWRhdGFfcHRyKHN0cnVjdCBkbWFfYXN5bmNfdHhfZGVzY3Jp cHRvciAqZGVzYywKKwkJc2l6ZV90ICpwYXlsb2FkX2xlbiwgc2l6ZV90ICptYXhfbGVuKTsKKwor ICAgICBpbnQgZG1hZW5naW5lX2Rlc2Nfc2V0X21ldGFkYXRhX2xlbihzdHJ1Y3QgZG1hX2FzeW5j X3R4X2Rlc2NyaXB0b3IgKmRlc2MsCisJCXNpemVfdCBwYXlsb2FkX2xlbik7CisKKyAgQ2xpZW50 IGRyaXZlcnMgY2FuIHF1ZXJ5IGlmIGEgZ2l2ZW4gbW9kZSBpcyBzdXBwb3J0ZWQgd2l0aDoKKwor ICAuLiBjb2RlLWJsb2NrOjogYworCisgICAgIGJvb2wgZG1hZW5naW5lX2lzX21ldGFkYXRhX21v ZGVfc3VwcG9ydGVkKHN0cnVjdCBkbWFfY2hhbiAqY2hhbiwKKwkJZW51bSBkbWFfZGVzY19tZXRh ZGF0YV9tb2RlIG1vZGUpOworCisgIERlcGVuZGluZyBvbiB0aGUgdXNlZCBtb2RlIGNsaWVudCBk cml2ZXJzIG11c3QgZm9sbG93IGRpZmZlcmVudCBmbG93LgorCisgIERFU0NfTUVUQURBVEFfQ0xJ RU5UCisKKyAgICAtIERNQV9NRU1fVE9fREVWIC8gREVWX01FTV9UT19NRU06CisgICAgICAxLiBw cmVwYXJlIHRoZSBkZXNjcmlwdG9yIChkbWFlbmdpbmVfcHJlcF8qKQorICAgICAgICAgY29uc3Ry dWN0IHRoZSBtZXRhZGF0YSBpbiB0aGUgY2xpZW50J3MgYnVmZmVyCisgICAgICAyLiB1c2UgZG1h ZW5naW5lX2Rlc2NfYXR0YWNoX21ldGFkYXRhKCkgdG8gYXR0YWNoIHRoZSBidWZmZXIgdG8gdGhl CisgICAgICAgICBkZXNjcmlwdG9yCisgICAgICAzLiBzdWJtaXQgdGhlIHRyYW5zZmVyCisgICAg LSBETUFfREVWX1RPX01FTToKKyAgICAgIDEuIHByZXBhcmUgdGhlIGRlc2NyaXB0b3IgKGRtYWVu Z2luZV9wcmVwXyopCisgICAgICAyLiB1c2UgZG1hZW5naW5lX2Rlc2NfYXR0YWNoX21ldGFkYXRh KCkgdG8gYXR0YWNoIHRoZSBidWZmZXIgdG8gdGhlCisgICAgICAgICBkZXNjcmlwdG9yCisgICAg ICAzLiBzdWJtaXQgdGhlIHRyYW5zZmVyCisgICAgICA0LiB3aGVuIHRoZSB0cmFuc2ZlciBpcyBj b21wbGV0ZWQsIHRoZSBtZXRhZGF0YSBzaG91bGQgYmUgYXZhaWxhYmxlIGluIHRoZQorICAgICAg ICAgYXR0YWNoZWQgYnVmZmVyCisKKyAgREVTQ19NRVRBREFUQV9FTkdJTkUKKworICAgIC0gRE1B X01FTV9UT19ERVYgLyBERVZfTUVNX1RPX01FTToKKyAgICAgIDEuIHByZXBhcmUgdGhlIGRlc2Ny aXB0b3IgKGRtYWVuZ2luZV9wcmVwXyopCisgICAgICAyLiB1c2UgZG1hZW5naW5lX2Rlc2NfZ2V0 X21ldGFkYXRhX3B0cigpIHRvIGdldCB0aGUgcG9pbnRlciB0byB0aGUKKyAgICAgICAgIGVuZ2lu ZSdzIG1ldGFkYXRhIGFyZWEKKyAgICAgIDMuIHVwZGF0ZSB0aGUgbWV0YWRhdGEgYXQgdGhlIHBv aW50ZXIKKyAgICAgIDQuIHVzZSBkbWFlbmdpbmVfZGVzY19zZXRfbWV0YWRhdGFfbGVuKCkgIHRv IHRlbGwgdGhlIERNQSBlbmdpbmUgdGhlCisgICAgICAgICBhbW91bnQgb2YgZGF0YSB0aGUgY2xp ZW50IGhhcyBwbGFjZWQgaW50byB0aGUgbWV0YWRhdGEgYnVmZmVyCisgICAgICA1LiBzdWJtaXQg dGhlIHRyYW5zZmVyCisgICAgLSBETUFfREVWX1RPX01FTToKKyAgICAgIDEuIHByZXBhcmUgdGhl IGRlc2NyaXB0b3IgKGRtYWVuZ2luZV9wcmVwXyopCisgICAgICAyLiBzdWJtaXQgdGhlIHRyYW5z ZmVyCisgICAgICAzLiBvbiB0cmFuc2ZlciBjb21wbGV0aW9uLCB1c2UgZG1hZW5naW5lX2Rlc2Nf Z2V0X21ldGFkYXRhX3B0cigpIHRvIGdldCB0aGUKKyAgICAgICAgIHBvaW50ZXIgdG8gdGhlIGVu Z2luZSdzIG1ldGFkYXRhIGFyZQorICAgICAgNC4gUmVhZCBvdXQgdGhlIG1ldGFkYXRlIGZyb20g dGhlIHBvaW50ZXIKKworICAuLiBub3RlOjoKKworICAgICBNaXhlZCB1c2Ugb2YgREVTQ19NRVRB REFUQV9DTElFTlQgLyBERVNDX01FVEFEQVRBX0VOR0lORSBpcyBub3QgYWxsb3dlZCwKKyAgICAg Y2xpZW50IGRyaXZlcnMgbXVzdCB1c2UgZWl0aGVyIG9mIHRoZSBtb2RlcyBwZXIgZGVzY3JpcHRv ci4KKwogNC4gU3VibWl0IHRoZSB0cmFuc2FjdGlvbgogCiAgICBPbmNlIHRoZSBkZXNjcmlwdG9y IGhhcyBiZWVuIHByZXBhcmVkIGFuZCB0aGUgY2FsbGJhY2sgaW5mb3JtYXRpb24KZGlmZiAtLWdp dCBhL0RvY3VtZW50YXRpb24vZHJpdmVyLWFwaS9kbWFlbmdpbmUvcHJvdmlkZXIucnN0IGIvRG9j dW1lbnRhdGlvbi9kcml2ZXItYXBpL2RtYWVuZ2luZS9wcm92aWRlci5yc3QKaW5kZXggZGZjNDQ4 NmI1NzQzLi45ZTZkODdiM2M0NzcgMTAwNjQ0Ci0tLSBhL0RvY3VtZW50YXRpb24vZHJpdmVyLWFw aS9kbWFlbmdpbmUvcHJvdmlkZXIucnN0CisrKyBiL0RvY3VtZW50YXRpb24vZHJpdmVyLWFwaS9k bWFlbmdpbmUvcHJvdmlkZXIucnN0CkBAIC0yNDcsNiArMjQ3LDUyIEBAIGFmdGVyIGVhY2ggdHJh bnNmZXIuIEluIGNhc2Ugb2YgYSByaW5nIGJ1ZmZlciwgdGhleSBtYXkgbG9vcAogKERNQV9DWUNM SUMpLiBBZGRyZXNzZXMgcG9pbnRpbmcgdG8gYSBkZXZpY2UncyByZWdpc3RlciAoZS5nLiBhIEZJ Rk8pCiBhcmUgdHlwaWNhbGx5IGZpeGVkLgogCitQZXIgZGVzY3JpcHRvciBtZXRhZGF0YSBzdXBw b3J0CistLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tCitTb21lIGRhdGEgbW92ZW1lbnQg YXJjaGl0ZWN1cmUgKERNQSBjb250cm9sbGVyIGFuZCBwZXJpcGhlcmFscykgdXNlcyBtZXRhZGF0 YQorYXNzb2NpYXRlZCB3aXRoIGEgdHJhbnNhY3Rpb24uIFRoZSBETUEgY29udHJvbGxlciByb2xl IGlzIHRvIHRyYW5zZmVyIHRoZQorcGF5bG9hZCBhbmQgdGhlIG1ldGFkYXRhIGFsb25nc2lkZS4K K1RoZSBtZXRhZGF0YSBpdHNlbGYgaXMgbm90IHVzZWQgYnkgdGhlIERNQSBlbmdpbmUgaXRzZWxm LCBidXQgaXQgY29udGFpbnMKK3BhcmFtZXRlcnMsIGtleXMsIHZlY3RvcnMsIGV0YyBmb3IgcGVy aXBoZXJhbCBvciBmcm9tIHRoZSBwZXJpcGhlcmFsLgorCitUaGUgRE1BZW5naW5lIGZyYW1ld29y ayBwcm92aWRlcyBhIGdlbmVyaWMgd2F5cyB0byBmYWNpbGl0YXRlIHRoZSBtZXRhZGF0YSBmb3IK K2Rlc2NyaXB0b3JzLiBEZXBlbmRpbmcgb24gdGhlIGFyY2hpdGVjdHVyZSB0aGUgRE1BIGRyaXZl ciBjYW4gaW1wbGVtZW50IGVpdGhlcgorb3IgYm90aCBvZiB0aGUgbWV0aG9kcyBhbmQgaXQgaXMg dXAgdG8gdGhlIGNsaWVudCBkcml2ZXIgdG8gY2hvb3NlIHdoaWNoIG9uZQordG8gdXNlLgorCist IERFU0NfTUVUQURBVEFfQ0xJRU5UCisKKyAgVGhlIG1ldGFkYXRhIGJ1ZmZlciBpcyBhbGxvY2F0 ZWQvcHJvdmlkZWQgYnkgdGhlIGNsaWVudCBkcml2ZXIgYW5kIGl0IGlzCisgIGF0dGFjaGVkICh2 aWEgdGhlIGRtYWVuZ2luZV9kZXNjX2F0dGFjaF9tZXRhZGF0YSgpIGhlbHBlciB0byB0aGUgZGVz Y3JpcHRvci4KKworICBGcm9tIHRoZSBETUEgZHJpdmVyIHRoZSBmb2xsb3dpbmcgaXMgZXhwZWN0 ZWQgZm9yIHRoaXMgbW9kZToKKyAgLSBETUFfTUVNX1RPX0RFViAvIERFVl9NRU1fVE9fTUVNCisg ICAgVGhlIGRhdGEgZnJvbSB0aGUgcHJvdmlkZWQgbWV0YWRhdGEgYnVmZmVyIHNob3VsZCBiZSBw cmVwYXJlZCBmb3IgdGhlIERNQQorICAgIGNvbnRyb2xsZXIgdG8gYmUgc2VudCBhbG9uZ3NpZGUg b2YgdGhlIHBheWxvYWQgZGF0YS4gRWl0aGVyIGJ5IGNvcHlpbmcgdG8gYQorICAgIGhhcmR3YXJl IGRlc2NyaXB0b3IsIG9yIGhpZ2hseSBjb3VwbGVkIHBhY2tldC4KKyAgLSBETUFfREVWX1RPX01F TQorICAgIE9uIHRyYW5zZmVyIGNvbXBsZXRpb24gdGhlIERNQSBkcml2ZXIgbXVzdCBjb3B5IHRo ZSBtZXRhZGF0YSB0byB0aGUgY2xpZW50CisgICAgcHJvdmlkZWQgbWV0YWRhdGEgYnVmZmVyLgor CistIERFU0NfTUVUQURBVEFfRU5HSU5FCisKKyAgVGhlIG1ldGFkYXRhIGJ1ZmZlciBpcyBhbGxv Y2F0ZWQvbWFuYWdlZCBieSB0aGUgRE1BIGRyaXZlci4gVGhlIGNsaWVudCBkcml2ZXIKKyAgY2Fu IGFzayBmb3IgdGhlIHBvaW50ZXIsIG1heGltdW0gc2l6ZSBhbmQgdGhlIGN1cnJlbnRseSB1c2Vk IHNpemUgb2YgdGhlCisgIG1ldGFkYXRhIGFuZCBjYW4gZGlyZWN0bHkgdXBkYXRlIG9yIHJlYWQg aXQuIGRtYWVuZ2luZV9kZXNjX2dldF9tZXRhZGF0YV9wdHIoKQorICBhbmQgZG1hZW5naW5lX2Rl c2Nfc2V0X21ldGFkYXRhX2xlbigpIGlzIHByb3ZpZGVkIGFzIGhlbHBlciBmdW5jdGlvbnMuCisK KyAgRnJvbSB0aGUgRE1BIGRyaXZlciB0aGUgZm9sbG93aW5nIGlzIGV4cGVjdGVkIGZvciB0aGlz IG1vZGU6CisgIC0gZ2V0X21ldGFkYXRhX3B0cgorICAgIFNob3VsZCByZXR1cm4gYSBwb2ludGVy IGZvciB0aGUgbWV0YWRhdGEgYnVmZmVyLCB0aGUgbWF4aW11bSBzaXplIG9mIHRoZQorICAgIG1l dGFkYXRhIGJ1ZmZlciBhbmQgdGhlIGN1cnJlbnRseSB1c2VkIC8gdmFsaWQgKGlmIGFueSkgYnl0 ZXMgaW4gdGhlIGJ1ZmZlci4KKyAgLSBzZXRfbWV0YWRhdGFfbGVuCisgICAgSXQgaXMgY2FsbGVk IGJ5IHRoZSBjbGllbnRzIGFmdGVyIGl0IGhhdmUgcGxhY2VkIHRoZSBtZXRhZGF0YSB0byB0aGUg YnVmZmVyCisgICAgdG8gbGV0IHRoZSBETUEgZHJpdmVyIGtub3cgdGhlIG51bWJlciBvZiB2YWxp ZCBieXRlcyBwcm92aWRlZC4KKworICBOb3RlOiBzaW5jZSB0aGUgY2xpZW50IHdpbGwgYXNrIGZv ciB0aGUgbWV0YWRhdGEgcG9pbnRlciBpbiB0aGUgY29tcGxldGlvbgorICBjYWxsYmFjayAoaW4g RE1BX0RFVl9UT19NRU0gY2FzZSkgdGhlIERNQSBkcml2ZXIgbXVzdCBlbnN1cmUgdGhhdCB0aGUK KyAgZGVzY3JpcHRvciBpcyBub3QgZnJlZWQgdXAgcHJpb3IgdGhlIGNhbGxiYWNrIGlzIGNhbGxl ZC4KKwogRGV2aWNlIG9wZXJhdGlvbnMKIC0tLS0tLS0tLS0tLS0tLS0tCiAK