| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include <zircon/device/block.h> |
| #include <zircon/types.h> |
| |
| __BEGIN_CDECLS |
| |
| typedef struct fifo_client fifo_client_t; |
| |
| // Allocates a block fifo client. The client is thread-safe, as long |
| // as each thread accessing the client uses a distinct reqid. |
| // This function takes ownership of |fifo|. |
| // |
| // Valid groups are in the range [0, MAX_TXN_GROUP_COUNT). |
| zx_status_t block_fifo_create_client(zx_handle_t fifo, fifo_client_t** out); |
| |
| // Frees a block fifo client. |
| void block_fifo_release_client(fifo_client_t* client); |
| |
| // Sends 'count' block device requests and waits for a response. |
| // The current implementation is thread-safe, but may only be called from a |
| // single process, as it differentiates callers by stack addresses (in an |
| // effort to make each transaction require no heap allocation). |
| // |
| // Each of the requests should set the following: |
| // FIELD OPS |
| // -------------------------------------- ----------------- |
| // group All (must be the same for all requests) |
| // vmoid All |
| // opcode (BLOCKIO_OP_MASK bits only) All |
| // length read, write |
| // vmo_offset read, write |
| // dev_offset read, write |
| zx_status_t block_fifo_txn(fifo_client_t* client, block_fifo_request_t* requests, size_t count); |
| |
| __END_CDECLS |
