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,3/3] stk1160: Use non-coherent buffers for USB transfers From: Ezequiel Garcia Message-Id: <20180830172030.23344-4-ezequiel@collabora.com> Date: Thu, 30 Aug 2018 14:20:30 -0300 To: linux-media@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Laurent Pinchart , Tomasz Figa , "Matwey V . Kornilov" , Alan Stern , kernel@collabora.com, Keiichi Watanabe , Ezequiel Garcia List-ID: UGxhdGZvcm1zIHdpdGhvdXQgaGFyZHdhcmUgY29oZXJlbmN5IGNhbiBiZW5lZml0IGEgbG90CmZy b20gdXNpbmcgbm9uLWNvaGVyZW50IGJ1ZmZlcnMuIE1vcmVvdmVyLCBwbGF0Zm9ybXMKd2l0aCBo YXJkd2FyZSBjb2hlcmVuY3kgYXJlbid0IGltcGFjdGVkIGJ5IHRoaXMgY2hhbmdlLgoKRm9yIGlu c3RhbmNlLCBvbiBBTTMzNXgsIHdoaWxlIGl0J3Mgc3RpbGwgbm90IHBvc3NpYmxlCnRvIGNhcHR1 cmUgZnVsbCByZXNvbHV0aW9uIGZyYW1lcywgdGhpcyBwYXRjaCBlbmFibGVzCmhhbGYtcmVzb2x1 dGlvbiBmcmFtZSBzdHJlYW1zIHRvIHdvcmsuCgpTaWduZWQtb2ZmLWJ5OiBFemVxdWllbCBHYXJj aWEgPGV6ZXF1aWVsQGNvbGxhYm9yYS5jb20+Ci0tLQogZHJpdmVycy9tZWRpYS91c2Ivc3RrMTE2 MC9zdGsxMTYwLXZpZGVvLmMgfCAyMiArKysrKystLS0tLS0tLS0tLS0tLS0tCiAxIGZpbGUgY2hh bmdlZCwgNiBpbnNlcnRpb25zKCspLCAxNiBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2 ZXJzL21lZGlhL3VzYi9zdGsxMTYwL3N0azExNjAtdmlkZW8uYyBiL2RyaXZlcnMvbWVkaWEvdXNi L3N0azExNjAvc3RrMTE2MC12aWRlby5jCmluZGV4IDI4MTFmNjEyODIwZi4uYWViNDI2NGQxOTk4 IDEwMDY0NAotLS0gYS9kcml2ZXJzL21lZGlhL3VzYi9zdGsxMTYwL3N0azExNjAtdmlkZW8uYwor KysgYi9kcml2ZXJzL21lZGlhL3VzYi9zdGsxMTYwL3N0azExNjAtdmlkZW8uYwpAQCAtMjQwLDYg KzI0MCw5IEBAIHN0YXRpYyB2b2lkIHN0azExNjBfcHJvY2Vzc19pc29jKHN0cnVjdCBzdGsxMTYw ICpkZXYsIHN0cnVjdCB1cmIgKnVyYikKIAkJcmV0dXJuOwogCX0KIAorCWRtYV9zeW5jX3Npbmds ZV9mb3JfY3B1KCZ1cmItPmRldi0+ZGV2LCB1cmItPnRyYW5zZmVyX2RtYSwKKwkJdXJiLT50cmFu c2Zlcl9idWZmZXJfbGVuZ3RoLCBETUFfRlJPTV9ERVZJQ0UpOworCiAJZm9yIChpID0gMDsgaSA8 IHVyYi0+bnVtYmVyX29mX3BhY2tldHM7IGkrKykgewogCQlzdGF0dXMgPSB1cmItPmlzb19mcmFt ZV9kZXNjW2ldLnN0YXR1czsKIAkJaWYgKHN0YXR1cyA8IDApIHsKQEAgLTM3OSwxNiArMzgyLDEx IEBAIHZvaWQgc3RrMTE2MF9mcmVlX2lzb2Moc3RydWN0IHN0azExNjAgKmRldikKIAkJdXJiID0g ZGV2LT5pc29jX2N0bC51cmJbaV07CiAJCWlmICh1cmIpIHsKIAotCQkJaWYgKGRldi0+aXNvY19j dGwudHJhbnNmZXJfYnVmZmVyW2ldKSB7Ci0jaWZuZGVmIENPTkZJR19ETUFfTk9OQ09IRVJFTlQK LQkJCQl1c2JfZnJlZV9jb2hlcmVudChkZXYtPnVkZXYsCisJCQlpZiAoZGV2LT5pc29jX2N0bC50 cmFuc2Zlcl9idWZmZXJbaV0pCisJCQkJdXNiX2ZyZWVfbm9uY29oZXJlbnQoZGV2LT51ZGV2LAog CQkJCQl1cmItPnRyYW5zZmVyX2J1ZmZlcl9sZW5ndGgsCiAJCQkJCWRldi0+aXNvY19jdGwudHJh bnNmZXJfYnVmZmVyW2ldLAogCQkJCQl1cmItPnRyYW5zZmVyX2RtYSk7Ci0jZWxzZQotCQkJCWtm cmVlKGRldi0+aXNvY19jdGwudHJhbnNmZXJfYnVmZmVyW2ldKTsKLSNlbmRpZgotCQkJfQogCQkJ dXNiX2ZyZWVfdXJiKHVyYik7CiAJCQlkZXYtPmlzb2NfY3RsLnVyYltpXSA9IE5VTEw7CiAJCX0K QEAgLTQ2MSwxMiArNDU5LDggQEAgaW50IHN0azExNjBfYWxsb2NfaXNvYyhzdHJ1Y3Qgc3RrMTE2 MCAqZGV2KQogCQkJZ290byBmcmVlX2lfYnVmczsKIAkJZGV2LT5pc29jX2N0bC51cmJbaV0gPSB1 cmI7CiAKLSNpZm5kZWYgQ09ORklHX0RNQV9OT05DT0hFUkVOVAotCQlkZXYtPmlzb2NfY3RsLnRy YW5zZmVyX2J1ZmZlcltpXSA9IHVzYl9hbGxvY19jb2hlcmVudChkZXYtPnVkZXYsCisJCWRldi0+ aXNvY19jdGwudHJhbnNmZXJfYnVmZmVyW2ldID0gdXNiX2FsbG9jX25vbmNvaGVyZW50KGRldi0+ dWRldiwKIAkJCXNiX3NpemUsIEdGUF9LRVJORUwsICZ1cmItPnRyYW5zZmVyX2RtYSk7Ci0jZWxz ZQotCQlkZXYtPmlzb2NfY3RsLnRyYW5zZmVyX2J1ZmZlcltpXSA9IGttYWxsb2Moc2Jfc2l6ZSwg R0ZQX0tFUk5FTCk7Ci0jZW5kaWYKIAkJaWYgKCFkZXYtPmlzb2NfY3RsLnRyYW5zZmVyX2J1ZmZl cltpXSkgewogCQkJc3RrMTE2MF9lcnIoImNhbm5vdCBhbGxvYyAlZCBieXRlcyBmb3IgdHhbJWRd IGJ1ZmZlclxuIiwKIAkJCQlzYl9zaXplLCBpKTsKQEAgLTQ5MCwxMSArNDg0LDcgQEAgaW50IHN0 azExNjBfYWxsb2NfaXNvYyhzdHJ1Y3Qgc3RrMTE2MCAqZGV2KQogCQl1cmItPmludGVydmFsID0g MTsKIAkJdXJiLT5zdGFydF9mcmFtZSA9IDA7CiAJCXVyYi0+bnVtYmVyX29mX3BhY2tldHMgPSBt YXhfcGFja2V0czsKLSNpZm5kZWYgQ09ORklHX0RNQV9OT05DT0hFUkVOVAogCQl1cmItPnRyYW5z ZmVyX2ZsYWdzID0gVVJCX0lTT19BU0FQIHwgVVJCX05PX1RSQU5TRkVSX0RNQV9NQVA7Ci0jZWxz ZQotCQl1cmItPnRyYW5zZmVyX2ZsYWdzID0gVVJCX0lTT19BU0FQOwotI2VuZGlmCiAKIAkJayA9 IDA7CiAJCWZvciAoaiA9IDA7IGogPCBtYXhfcGFja2V0czsgaisrKSB7Cg==