448 lines
15 KiB
C
448 lines
15 KiB
C
/****************************************************************************
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* drivers/misc/rpmsgblk_server.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/mmcsd.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/rptun/openamp.h>
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#include "rpmsgblk.h"
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/****************************************************************************
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* Pre-processor definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct rpmsgblk_server_s
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{
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struct rpmsg_endpoint ept;
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FAR struct inode *blknode;
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FAR const struct block_operations *bops;
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Functions handle the messages from the client cpu */
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static int rpmsgblk_open_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_close_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_read_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_write_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_geometry_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_ioctl_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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static int rpmsgblk_unlink_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv);
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/* Functions for creating communication with client cpu */
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static bool rpmsgblk_ns_match(FAR struct rpmsg_device *rdev,
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FAR void *priv, FAR const char *name,
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uint32_t dest);
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static void rpmsgblk_ns_bind(FAR struct rpmsg_device *rdev,
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FAR void *priv, FAR const char *name,
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uint32_t dest);
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static void rpmsgblk_ns_unbind(FAR struct rpmsg_endpoint *ept);
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static int rpmsgblk_ept_cb(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len, uint32_t src,
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FAR void *priv);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const rpmsg_ept_cb g_rpmsgblk_handler[] =
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{
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[RPMSGBLK_OPEN] = rpmsgblk_open_handler,
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[RPMSGBLK_CLOSE] = rpmsgblk_close_handler,
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[RPMSGBLK_READ] = rpmsgblk_read_handler,
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[RPMSGBLK_WRITE] = rpmsgblk_write_handler,
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[RPMSGBLK_GEOMETRY] = rpmsgblk_geometry_handler,
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[RPMSGBLK_IOCTL] = rpmsgblk_ioctl_handler,
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[RPMSGBLK_UNLINK] = rpmsgblk_unlink_handler,
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rpmsgblk_open_handler
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****************************************************************************/
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static int rpmsgblk_open_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_open_s *msg = data;
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if (server->blknode != NULL)
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{
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msg->header.result = -EBUSY;
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goto out;
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}
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msg->header.result = open_blockdriver(&ept->name[RPMSGBLK_NAME_PREFIX_LEN],
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0, &server->blknode);
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if (msg->header.result < 0)
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{
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ferr("block device open failed, ret=%d\n", msg->header.result);
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goto out;
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}
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server->bops = server->blknode->u.i_bops;
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out:
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return rpmsg_send(ept, msg, sizeof(*msg));
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}
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/****************************************************************************
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* Name: rpmsgblk_close_handler
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****************************************************************************/
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static int rpmsgblk_close_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_close_s *msg = data;
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msg->header.result = close_blockdriver(server->blknode);
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if (msg->header.result < 0)
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{
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ferr("block device close failed, ret=%d\n", msg->header.result);
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goto out;
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}
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server->bops = NULL;
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server->blknode = NULL;
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out:
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return rpmsg_send(ept, msg, sizeof(*msg));
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}
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/****************************************************************************
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* Name: rpmsgblk_read_handler
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****************************************************************************/
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static int rpmsgblk_read_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_read_s *msg = data;
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FAR struct rpmsgblk_read_s *rsp;
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int ret = -ENOENT;
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size_t read = 0;
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size_t nsectors;
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uint32_t space;
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while (read < msg->nsectors)
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{
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rsp = rpmsg_get_tx_payload_buffer(ept, &space, true);
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if (rsp == NULL)
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{
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ferr("get tx payload failed or no enough space\n");
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return -ENOMEM;
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}
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DEBUGASSERT(space >= sizeof(*msg) - 1 + msg->sectorsize);
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*rsp = *msg;
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nsectors = (space - sizeof(*msg) + 1) / msg->sectorsize;
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if (nsectors > msg->nsectors - read)
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{
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nsectors = msg->nsectors - read;
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}
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ret = server->bops->read(server->blknode, (unsigned char *)rsp->buf,
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msg->startsector, nsectors);
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rsp->header.result = ret;
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rpmsg_send_nocopy(ept, rsp, (ret < 0 ? 0 : ret * msg->sectorsize) +
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sizeof(*rsp) - 1);
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if (ret <= 0)
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{
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ferr("mtd block read failed\n");
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break;
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}
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read += ret;
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}
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return 0;
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}
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/****************************************************************************
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* Name: rpmsgblk_write_handler
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****************************************************************************/
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static int rpmsgblk_write_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_write_s *msg = data;
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int ret;
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ret = server->bops->write(server->blknode, (FAR unsigned char *)msg->buf,
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msg->startsector, msg->nsectors);
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if (ret <= 0)
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{
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ferr("mtd block write failed\n");
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}
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/* cookie != 0 indicate the data has been sent complete, so send back
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* the total written blocks.
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*/
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if (msg->header.cookie != 0)
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{
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msg->header.result = ret;
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return rpmsg_send(ept, msg, sizeof(*msg) - 1);
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}
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return 0;
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}
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/****************************************************************************
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* Name: rpmsgblk_ioctl_handler
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****************************************************************************/
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static int rpmsgblk_geometry_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_geometry_s *msg = data;
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DEBUGASSERT(msg->arglen == sizeof(struct geometry));
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msg->header.result = server->bops->geometry(
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server->blknode, (FAR struct geometry *)msg->buf);
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return rpmsg_send(ept, msg, len);
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}
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/****************************************************************************
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* Name: rpmsgblk_ioctl_handler
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****************************************************************************/
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static int rpmsgblk_ioctl_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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FAR struct rpmsgblk_ioctl_s *msg = data;
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switch (msg->request)
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{
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case MMC_IOC_CMD:
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{
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FAR struct mmc_ioc_cmd *ioc =
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(FAR struct mmc_ioc_cmd *)(uintptr_t)msg->buf;
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if (ioc->data_ptr)
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{
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ioc->data_ptr = (uint64_t)(uintptr_t)
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((FAR uint8_t *)ioc + sizeof(*ioc));
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}
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}
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break;
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case MMC_IOC_MULTI_CMD:
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{
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FAR struct mmc_ioc_multi_cmd *mioc =
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(FAR struct mmc_ioc_multi_cmd *)(uintptr_t)msg->buf;
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uint64_t num = mioc->num_of_cmds;
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size_t off = sizeof(struct mmc_ioc_multi_cmd) +
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num * sizeof(struct mmc_ioc_cmd);
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uint64_t i;
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for (i = 0; i < num; i++)
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{
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if (mioc->cmds[i].data_ptr)
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{
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mioc->cmds[i].data_ptr = (uint64_t)(uintptr_t)
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((FAR uint8_t *)mioc + off);
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off += mioc->cmds[i].blksz * mioc->cmds[i].blocks;
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}
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}
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}
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break;
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default:
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break;
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}
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msg->header.result = server->bops->ioctl(server->blknode, msg->request,
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msg->arglen > 0 ?
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(unsigned long)msg->buf :
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msg->arg);
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return rpmsg_send(ept, msg, len);
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}
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/****************************************************************************
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* Name: rpmsgblk_unlink_handler
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****************************************************************************/
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static int rpmsgblk_unlink_handler(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len,
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uint32_t src, FAR void *priv)
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{
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FAR struct rpmsgblk_unlink_s *msg = data;
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#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
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FAR struct rpmsgblk_server_s *server = ept->priv;
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msg->header.result = server->bops->unlink(server->blknode);
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#else
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msg->header.result = -ENXIO;
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#endif
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return rpmsg_send(ept, msg, len);
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}
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/****************************************************************************
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* Name: rpmsgblk_ns_match
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****************************************************************************/
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static bool rpmsgblk_ns_match(FAR struct rpmsg_device *rdev,
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FAR void *priv, FAR const char *name,
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uint32_t dest)
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{
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return !strncmp(name, RPMSGBLK_NAME_PREFIX, RPMSGBLK_NAME_PREFIX_LEN);
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}
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/****************************************************************************
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* Name: rpmsgblk_ns_bind
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****************************************************************************/
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static void rpmsgblk_ns_bind(FAR struct rpmsg_device *rdev,
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FAR void *priv, FAR const char *name,
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uint32_t dest)
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{
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FAR struct rpmsgblk_server_s *server;
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int ret;
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server = kmm_zalloc(sizeof(*server));
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if (server == NULL)
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{
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ferr("mtd server malloced failed\n");
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return;
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}
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server->ept.priv = server;
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ret = rpmsg_create_ept(&server->ept, rdev, name,
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RPMSG_ADDR_ANY, dest,
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rpmsgblk_ept_cb, rpmsgblk_ns_unbind);
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if (ret < 0)
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{
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ferr("endpoint create failed, ret=%d\n", ret);
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kmm_free(server);
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}
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}
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/****************************************************************************
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* Name: rpmsgblk_ns_unbind
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****************************************************************************/
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static void rpmsgblk_ns_unbind(FAR struct rpmsg_endpoint *ept)
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{
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FAR struct rpmsgblk_server_s *server = ept->priv;
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rpmsg_destroy_ept(&server->ept);
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kmm_free(server);
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}
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/****************************************************************************
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* Name: rpmsgblk_ept_cb
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****************************************************************************/
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static int rpmsgblk_ept_cb(FAR struct rpmsg_endpoint *ept,
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FAR void *data, size_t len, uint32_t src,
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FAR void *priv)
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{
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FAR struct rpmsgblk_header_s *header = data;
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uint32_t command = header->command;
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if (command < nitems(g_rpmsgblk_handler))
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{
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return g_rpmsgblk_handler[command](ept, data, len, src, priv);
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}
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return -EINVAL;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rpmsgblk_server_init
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*
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* Description:
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* Rpmsg-mtd server initialize function, the server cpu should call
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* this function.
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*
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* Parameters:
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* None
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*
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* Returned Values:
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* OK on success; A negated errno value is returned on any failure.
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*
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****************************************************************************/
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int rpmsgblk_server_init(void)
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{
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return rpmsg_register_callback(NULL,
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NULL,
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NULL,
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rpmsgblk_ns_match,
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rpmsgblk_ns_bind);
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}
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