Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/spdk/lib/nvme/nvme_io_msg.h b/src/spdk/lib/nvme/nvme_io_msg.h
new file mode 100644
index 000000000..9c18261d5
--- /dev/null
+++ b/src/spdk/lib/nvme/nvme_io_msg.h
@@ -0,0 +1,90 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * SPDK cuse
+ */
+
+
+#ifndef SPDK_NVME_IO_MSG_H_
+#define SPDK_NVME_IO_MSG_H_
+
+typedef void (*spdk_nvme_io_msg_fn)(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid,
+				    void *arg);
+
+struct spdk_nvme_io_msg {
+	struct spdk_nvme_ctrlr	*ctrlr;
+	uint32_t		nsid;
+
+	spdk_nvme_io_msg_fn	fn;
+	void			*arg;
+};
+
+struct nvme_io_msg_producer {
+	const char *name;
+	void (*update)(struct spdk_nvme_ctrlr *ctrlr);
+	void (*stop)(struct spdk_nvme_ctrlr *ctrlr);
+	STAILQ_ENTRY(nvme_io_msg_producer) link;
+};
+
+int nvme_io_msg_send(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid, spdk_nvme_io_msg_fn fn,
+		     void *arg);
+
+/**
+ * Process IO message sent to controller from external module.
+ *
+ * This call process requests from the ring, send IO to an allocated qpair or
+ * admin commands in its context. This call is non-blocking and intended to be
+ * polled by SPDK thread to provide safe environment for NVMe request
+ * completition sent by external module to controller.
+ *
+ * The caller must ensure that each controller is polled by only one thread at
+ * a time.
+ *
+ * This function may be called at any point while the controller is attached to
+ * the SPDK NVMe driver.
+ *
+ * \param ctrlr Opaque handle to NVMe controller.
+ *
+ * \return number of processed external IO messages.
+ */
+int nvme_io_msg_process(struct spdk_nvme_ctrlr *ctrlr);
+
+int nvme_io_msg_ctrlr_register(struct spdk_nvme_ctrlr *ctrlr,
+			       struct nvme_io_msg_producer *io_msg_producer);
+void nvme_io_msg_ctrlr_unregister(struct spdk_nvme_ctrlr *ctrlr,
+				  struct nvme_io_msg_producer *io_msg_producer);
+void nvme_io_msg_ctrlr_detach(struct spdk_nvme_ctrlr *ctrlr);
+void nvme_io_msg_ctrlr_update(struct spdk_nvme_ctrlr *ctrlr);
+
+#endif /* SPDK_NVME_IO_MSG_H_ */