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: [RFC,1/6] dma: Add Synopsys eDMA IP core driver From: Vinod Koul Message-Id: <20190103124542.GC21403@vkoul-mobl> Date: Thu, 3 Jan 2019 18:15:42 +0530 To: Gustavo Pimentel Cc: "linux-pci@vger.kernel.org" , "dmaengine@vger.kernel.org" , Eugeniy Paltsev , Andy Shevchenko , Joao Pinto List-ID: SGkgR3VzdGF2bywKCk9uIDAzLTAxLTE5LCAwOTo1MywgR3VzdGF2byBQaW1lbnRlbCB3cm90ZToK PiBIaSBWaW5vZCwKPiAKPiAoc25pcHBlZCkKPiAKPiA+Pj4gK3sKPiA+Pj4gKwlzdHJ1Y3QgZHdf ZWRtYV9jaGFuICpjaGFuID0gZGNoYW4yZHdfZWRtYV9jaGFuKGRjaGFuKTsKPiA+Pj4gKwljb25z dCBzdHJ1Y3QgZHdfZWRtYV9jb3JlX29wcyAqb3BzID0gY2hhbjJvcHMoY2hhbik7Cj4gPj4+ICsJ ZW51bSBkbWFfdHJhbnNmZXJfZGlyZWN0aW9uIGRpcjsKPiA+Pj4gKwl1bnNpZ25lZCBsb25nIGZs YWdzOwo+ID4+PiArCWludCBlcnIgPSAwOwo+ID4+PiArCj4gPj4+ICsJc3Bpbl9sb2NrX2lycXNh dmUoJmNoYW4tPnZjLmxvY2ssIGZsYWdzKTsKPiA+Pj4gKwo+ID4+PiArCWlmICghY29uZmlnKSB7 Cj4gPj4+ICsJCWVyciA9IC1FSU5WQUw7Cj4gPj4+ICsJCWdvdG8gZXJyX2NvbmZpZzsKPiA+Pj4g Kwl9Cj4gPj4+ICsKPiA+Pj4gKwlpZiAoY2hhbi0+Y29uZmlndXJlZCkgewo+ID4+PiArCQlkZXZf ZXJyKGNoYW4yZGV2KGNoYW4pLCAiOiBjaGFubmVsIGFscmVhZHkgY29uZmlndXJlZFxuIik7Cj4g Pj4+ICsJCWVyciA9IC1FUEVSTTsKPiA+Pj4gKwkJZ290byBlcnJfY29uZmlnOwo+ID4+PiArCX0K PiA+Pj4gKwo+ID4+PiArCWRpciA9IGNvbmZpZy0+ZGlyZWN0aW9uOwo+ID4+Cj4gPj4gRGlyZWN0 aW9uIGlzIGRlcHJlY2lhdGVkLCBJIGhhdmUgYWxyZWFkeSByZW1vdmVkIHRoZSB1c2FnZXMsIHNv IHBsZWFzZQo+ID4+IGRvIG5vdCBhZGQgbmV3IG9uZXMuCj4gPj4KPiA+PiBZb3UgbmVlZCB0byB0 YWtlIGRpcmVjdGlvbiBmb3IgcmVzcGVjdGl2ZSBwcmVwXyBjYWxscwo+ID4gCj4gPiBPaywgSSBh bHJlYWR5IGRvIHRoYXQuIElNSE8gSSBmb3VuZCBpdCBzdHJhbmdlIHRvIGhhdmUgdGhlIHNhbWUg aW5mb3JtYXRpb24KPiA+IHJlcGVhdGVkIG9uIHR3byBwbGFjZXMuIEJ1dCBub3cgdGhhdCB5b3Ug c2F5IHRoYXQgdGhpcyBpcyBkZXByZWNhdGVkLCBpdCBtYWtlcwo+ID4gc2Vuc2Ugbm93Lgo+ID4g Cj4gPj4KPiA+Pj4gKwlpZiAoZGlyID09IERNQV9ERVZfVE9fTUVNICYmIGNoYW4tPmRpciA9PSBF RE1BX0RJUl9XUklURSkgewo+ID4+PiArCQlkZXZfaW5mbyhjaGFuMmRldihjaGFuKSwKPiA+Pj4g KwkJCSI6IGRpcmVjdGlvbiBETUFfREVWX1RPX01FTSAoRURNQV9ESVJfV1JJVEUpXG4iKTsKPiA+ Pj4gKwkJY2hhbi0+cF9hZGRyID0gY29uZmlnLT5zcmNfYWRkcjsKPiA+Pj4gKwl9IGVsc2UgaWYg KGRpciA9PSBETUFfTUVNX1RPX0RFViAmJiBjaGFuLT5kaXIgPT0gRURNQV9ESVJfUkVBRCkgewo+ ID4+PiArCQlkZXZfaW5mbyhjaGFuMmRldihjaGFuKSwKPiA+Pj4gKwkJCSI6IGRpcmVjdGlvbiBE TUFfTUVNX1RPX0RFViAoRURNQV9ESVJfUkVBRClcbiIpOwo+ID4+PiArCQljaGFuLT5wX2FkZHIg PSBjb25maWctPmRzdF9hZGRyOwo+ID4+PiArCX0gZWxzZSB7Cj4gPj4+ICsJCWRldl9lcnIoY2hh bjJkZXYoY2hhbiksICI6IGludmFsaWQgZGlyZWN0aW9uXG4iKTsKPiA+Pj4gKwkJZXJyID0gLUVJ TlZBTDsKPiA+Pj4gKwkJZ290byBlcnJfY29uZmlnOwo+ID4+PiArCX0KPiA+Pgo+ID4+IFRoaXMg c2hvdWxkIGJlIHJlbW92ZWQKPiA+IAo+ID4gWWVhaCwgaXQgd2FzIGp1c3QgZm9yIHZhbGlkYXRp b24gcHVycG9zZXMuIE5vdyB0aGF0IGRpcmVjdGlvbiBpcyBkZXByZWNhdGVkIG9uCj4gPiB0aGUg QVBJLCBtYWtlcyBubyBzZW5zZSB0byB2YWxpZGF0ZSBpdC4KPiA+IAo+ID4+Cj4gPj4+ICsKPiA+ Pj4gKwlkZXZfaW5mbyhjaGFuMmRldihjaGFuKSwKPiA+Pj4gKwkJIjogc3JjX2FkZHIocGh5c2lj YWwpID0gMHglLjE2eFxuIiwgY29uZmlnLT5zcmNfYWRkcik7Cj4gPj4+ICsJZGV2X2luZm8oY2hh bjJkZXYoY2hhbiksCj4gPj4+ICsJCSI6IGRzdF9hZGRyKHBoeXNpY2FsKSA9IDB4JS4xNnhcbiIs IGNvbmZpZy0+ZHN0X2FkZHIpOwo+ID4+Cj4gCj4gSSd2ZSBhIGRvdWJ0IG5vdy4gQXMgeW91IGtu b3csIGZvciBhIERNQSB0cmFuc2ZlciB5b3UgbmVlZCB0aGUgc291cmNlIGFuZAo+IGRlc3RpbmF0 aW9uIGFkZHJlc3Nlcywgd2hpY2ggaW4gdGhlIGxpbWl0ZWQgY2FuIGJlIHN3YXBwZWQgYWNjb3Jk aW5nIHRvIHRoZQo+IGRpcmVjdGlvbiBNRU1fVE9fREVWL0RFVl9UT19NRU0gY2FzZS4KPiAKPiBG b3IgdGhlIHNha2Ugb2Ygc2ltcGxpY2l0eSwgSSdsbCBqdXN0IGNvbnNpZGVyIG5vdyB0aGUgTUVN X1RPX0RFViBjYXNlLCBzaW5jZQo+IHRoZSBvdGhlciBjYXNlIGlzIHNpbWlsYXIgYnV0IHRoZSBz b3VyY2UgYW5kIGRlc3RpbmF0aW9uIGFkZHJlc3MgYXJlIHN3YXBwZWQuCj4gCj4gSW4gbXkgY29k ZSBJIGNhbiBnZXQgc29tZSBvZiB0aGUgaW5mb3JtYXRpb24gdGhhdCBJIG5lZWQgYnkgdXNpbmcg dGhlCj4gc2dfZG1hX2FkZHJlc3MoKSBpbiB0aGUgc2NhdHRlci1nYXRoZXIgbGlzdCAod2hpY2gg Z2l2ZXMgbWUgdGhlIHNvdXJjZSBhZGRyZXNzKS4KPiAKPiBUaGUgcmVtYWluaW5nIGluZm9ybWF0 aW9uIEkgZ290IGZyb20gaGVyZSwgdXNpbmcgdGhlIGRpcmVjdGlvbiB0byBoZWxwIG1lIHRvCj4g c2VsZWN0IHdoaWNoIGFkZHJlc3MgSSdsbCB1c2UgbGF0ZXIgb24gdGhlIERNQSB0cmFuc2Zlciwg aW4gdGhpcyBjYXNlIHRoZQo+IGRlc3RpbmF0aW9uIGFkZHJlc3MuCj4gCj4gU2luY2UgdGhpcyBp cyBkZXByZWNhdGVkIGhvdyBzaG91bGQgSSBwcm9jZWVkPyBIb3cgY2FuIEkgZ2V0IHRoYXQgaW5m b3JtYXRpb24/Cj4gVGhlcmUgaXMgc29tZSBzaW1pbGFyIGZ1bmN0aW9uIHRvIHNnX2RtYV9hZGRy ZXNzKCkgdGhhdCBjb3VsZCBnaXZlIG1lIHRoZQo+IGRlc3RpbmF0aW9uIGFkZHJlc3M/CgpTbyB0 aGUgZGlyZWN0aW9uIGZpZWxkIGlzIGRlcHJlY2F0ZWQgYnV0IHJlc3Qgb2YgdGhlIGNvbmZpZ3Vy YXRpb24gY29tZXMKZnJvbSBmcm9tIGRtYV9zbGF2ZV9jb25maWcuIFRoZSB1c2VyIHNob3VsZCBz ZXQgc3JjX2FkZHIsIGRzdF9hZGRyIGFuZAp0aGVuIGJhc2VkIG9uIGRpcmVjdGlvbiBwYXNzZWQg aW4gdGhlIC5kZXZpY2VfcHJlcF9kbWFfKiBjYWxsIGFyZ3VtZW50cwpvbmUgY2FuIHVzZSBvbmUg b2YgdGhlc2UgYXMgcGVyaXBoZXJhbCBhZGRyZXNzLgoKQWxzbywgcGxlYXNlIGtlZXAgaW4gbWlu ZCB0aGF0IGZvciBtZW1vcnkgdG8gbWVtb3J5IHRyYW5zZmVycyB5b3Ugc2hvdWxkCm5vdCBleHBl Y3QgdGhlIGRtYV9zbGF2ZV9jb25maWcgdG8gYmUgdXNlZAoKVGhhbmtzCg==