595 lines
15 KiB
C
595 lines
15 KiB
C
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/*
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* Copyright (C) STMicroelectronics SA 2015
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* Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include <linux/rpmsg.h>
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#include "delta.h"
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#include "delta-ipc.h"
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#include "delta-mem.h"
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#define IPC_TIMEOUT 100
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#define IPC_SANITY_TAG 0xDEADBEEF
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enum delta_ipc_fw_command {
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DELTA_IPC_OPEN,
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DELTA_IPC_SET_STREAM,
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DELTA_IPC_DECODE,
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DELTA_IPC_CLOSE
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};
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#define to_rpmsg_driver(__drv) container_of(__drv, struct rpmsg_driver, drv)
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#define to_delta(__d) container_of(__d, struct delta_dev, rpmsg_driver)
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#define to_ctx(hdl) ((struct delta_ipc_ctx *)hdl)
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#define to_pctx(ctx) container_of(ctx, struct delta_ctx, ipc_ctx)
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struct delta_ipc_header_msg {
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u32 tag;
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void *host_hdl;
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u32 copro_hdl;
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u32 command;
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};
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#define to_host_hdl(ctx) ((void *)ctx)
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#define msg_to_ctx(msg) ((struct delta_ipc_ctx *)(msg)->header.host_hdl)
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#define msg_to_copro_hdl(msg) ((msg)->header.copro_hdl)
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static inline dma_addr_t to_paddr(struct delta_ipc_ctx *ctx, void *vaddr)
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{
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return (ctx->ipc_buf->paddr + (vaddr - ctx->ipc_buf->vaddr));
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}
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static inline bool is_valid_data(struct delta_ipc_ctx *ctx,
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void *data, u32 size)
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{
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return ((data >= ctx->ipc_buf->vaddr) &&
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((data + size) <= (ctx->ipc_buf->vaddr + ctx->ipc_buf->size)));
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}
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/*
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* IPC shared memory (@ipc_buf_size, @ipc_buf_paddr) is sent to copro
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* at each instance opening. This memory is allocated by IPC client
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* and given through delta_ipc_open(). All messages parameters
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* (open, set_stream, decode) will have their phy address within
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* this IPC shared memory, avoiding de-facto recopies inside delta-ipc.
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* All the below messages structures are used on both host and firmware
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* side and are packed (use only of 32 bits size fields in messages
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* structures to ensure packing):
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* - struct delta_ipc_open_msg
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* - struct delta_ipc_set_stream_msg
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* - struct delta_ipc_decode_msg
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* - struct delta_ipc_close_msg
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* - struct delta_ipc_cb_msg
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*/
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struct delta_ipc_open_msg {
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struct delta_ipc_header_msg header;
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u32 ipc_buf_size;
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dma_addr_t ipc_buf_paddr;
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char name[32];
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u32 param_size;
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dma_addr_t param_paddr;
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};
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struct delta_ipc_set_stream_msg {
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struct delta_ipc_header_msg header;
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u32 param_size;
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dma_addr_t param_paddr;
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};
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struct delta_ipc_decode_msg {
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struct delta_ipc_header_msg header;
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u32 param_size;
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dma_addr_t param_paddr;
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u32 status_size;
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dma_addr_t status_paddr;
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};
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struct delta_ipc_close_msg {
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struct delta_ipc_header_msg header;
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};
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struct delta_ipc_cb_msg {
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struct delta_ipc_header_msg header;
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int err;
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};
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static void build_msg_header(struct delta_ipc_ctx *ctx,
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enum delta_ipc_fw_command command,
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struct delta_ipc_header_msg *header)
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{
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header->tag = IPC_SANITY_TAG;
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header->host_hdl = to_host_hdl(ctx);
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header->copro_hdl = ctx->copro_hdl;
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header->command = command;
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}
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int delta_ipc_open(struct delta_ctx *pctx, const char *name,
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struct delta_ipc_param *param, u32 ipc_buf_size,
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struct delta_buf **ipc_buf, void **hdl)
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{
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struct delta_dev *delta = pctx->dev;
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struct rpmsg_device *rpmsg_device = delta->rpmsg_device;
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struct delta_ipc_ctx *ctx = &pctx->ipc_ctx;
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struct delta_ipc_open_msg msg;
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struct delta_buf *buf = &ctx->ipc_buf_struct;
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int ret;
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if (!rpmsg_device) {
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dev_err(delta->dev,
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"%s ipc: failed to open, rpmsg is not initialized\n",
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pctx->name);
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pctx->sys_errors++;
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return -EINVAL;
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}
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if (!name) {
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dev_err(delta->dev,
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"%s ipc: failed to open, no name given\n",
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pctx->name);
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return -EINVAL;
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}
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if (!param || !param->data || !param->size) {
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dev_err(delta->dev,
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"%s ipc: failed to open, empty parameter\n",
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pctx->name);
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return -EINVAL;
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}
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if (!ipc_buf_size) {
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dev_err(delta->dev,
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"%s ipc: failed to open, no size given for ipc buffer\n",
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pctx->name);
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return -EINVAL;
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}
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if (param->size > ipc_buf_size) {
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dev_err(delta->dev,
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"%s ipc: failed to open, too large ipc parameter (%d bytes while max %d expected)\n",
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pctx->name,
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param->size, ctx->ipc_buf->size);
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return -EINVAL;
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}
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/* init */
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init_completion(&ctx->done);
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/*
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* allocation of contiguous buffer for
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* data of commands exchanged between
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* host and firmware coprocessor
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*/
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ret = hw_alloc(pctx, ipc_buf_size,
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"ipc data buffer", buf);
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if (ret)
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return ret;
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ctx->ipc_buf = buf;
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/* build rpmsg message */
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build_msg_header(ctx, DELTA_IPC_OPEN, &msg.header);
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msg.ipc_buf_size = ipc_buf_size;
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msg.ipc_buf_paddr = ctx->ipc_buf->paddr;
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memcpy(msg.name, name, sizeof(msg.name));
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msg.name[sizeof(msg.name) - 1] = 0;
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msg.param_size = param->size;
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memcpy(ctx->ipc_buf->vaddr, param->data, msg.param_size);
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msg.param_paddr = ctx->ipc_buf->paddr;
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/* send it */
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ret = rpmsg_send(rpmsg_device->ept, &msg, sizeof(msg));
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if (ret) {
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dev_err(delta->dev,
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"%s ipc: failed to open, rpmsg_send failed (%d) for DELTA_IPC_OPEN (name=%s, size=%d, data=%p)\n",
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pctx->name,
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ret, name, param->size, param->data);
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goto err;
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}
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/* wait for acknowledge */
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if (!wait_for_completion_timeout
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(&ctx->done, msecs_to_jiffies(IPC_TIMEOUT))) {
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dev_err(delta->dev,
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"%s ipc: failed to open, timeout waiting for DELTA_IPC_OPEN callback (name=%s, size=%d, data=%p)\n",
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pctx->name,
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name, param->size, param->data);
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ret = -ETIMEDOUT;
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goto err;
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}
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/* command completed, check error */
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if (ctx->cb_err) {
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dev_err(delta->dev,
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"%s ipc: failed to open, DELTA_IPC_OPEN completed but with error (%d) (name=%s, size=%d, data=%p)\n",
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pctx->name,
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ctx->cb_err, name, param->size, param->data);
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ret = -EIO;
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goto err;
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}
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*ipc_buf = ctx->ipc_buf;
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*hdl = (void *)ctx;
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return 0;
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err:
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pctx->sys_errors++;
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if (ctx->ipc_buf) {
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hw_free(pctx, ctx->ipc_buf);
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ctx->ipc_buf = NULL;
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}
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return ret;
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};
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int delta_ipc_set_stream(void *hdl, struct delta_ipc_param *param)
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{
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struct delta_ipc_ctx *ctx = to_ctx(hdl);
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struct delta_ctx *pctx = to_pctx(ctx);
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struct delta_dev *delta = pctx->dev;
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struct rpmsg_device *rpmsg_device = delta->rpmsg_device;
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struct delta_ipc_set_stream_msg msg;
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int ret;
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if (!hdl) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, invalid ipc handle\n",
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pctx->name);
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return -EINVAL;
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}
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if (!rpmsg_device) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, rpmsg is not initialized\n",
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pctx->name);
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return -EINVAL;
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}
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if (!param || !param->data || !param->size) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, empty parameter\n",
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pctx->name);
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return -EINVAL;
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}
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if (param->size > ctx->ipc_buf->size) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, too large ipc parameter(%d bytes while max %d expected)\n",
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pctx->name,
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param->size, ctx->ipc_buf->size);
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return -EINVAL;
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}
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if (!is_valid_data(ctx, param->data, param->size)) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, parameter is not in expected address range (size=%d, data=%p not in %p..%p)\n",
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pctx->name,
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param->size,
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param->data,
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ctx->ipc_buf->vaddr,
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ctx->ipc_buf->vaddr + ctx->ipc_buf->size - 1);
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return -EINVAL;
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}
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/* build rpmsg message */
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build_msg_header(ctx, DELTA_IPC_SET_STREAM, &msg.header);
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msg.param_size = param->size;
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msg.param_paddr = to_paddr(ctx, param->data);
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/* send it */
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ret = rpmsg_send(rpmsg_device->ept, &msg, sizeof(msg));
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if (ret) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, rpmsg_send failed (%d) for DELTA_IPC_SET_STREAM (size=%d, data=%p)\n",
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pctx->name,
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ret, param->size, param->data);
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pctx->sys_errors++;
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return ret;
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}
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/* wait for acknowledge */
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if (!wait_for_completion_timeout
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(&ctx->done, msecs_to_jiffies(IPC_TIMEOUT))) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, timeout waiting for DELTA_IPC_SET_STREAM callback (size=%d, data=%p)\n",
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pctx->name,
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param->size, param->data);
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pctx->sys_errors++;
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return -ETIMEDOUT;
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}
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/* command completed, check status */
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if (ctx->cb_err) {
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dev_err(delta->dev,
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"%s ipc: failed to set stream, DELTA_IPC_SET_STREAM completed but with error (%d) (size=%d, data=%p)\n",
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pctx->name,
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ctx->cb_err, param->size, param->data);
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pctx->sys_errors++;
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return -EIO;
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}
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return 0;
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}
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int delta_ipc_decode(void *hdl, struct delta_ipc_param *param,
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struct delta_ipc_param *status)
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{
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struct delta_ipc_ctx *ctx = to_ctx(hdl);
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struct delta_ctx *pctx = to_pctx(ctx);
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struct delta_dev *delta = pctx->dev;
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struct rpmsg_device *rpmsg_device = delta->rpmsg_device;
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struct delta_ipc_decode_msg msg;
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int ret;
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if (!hdl) {
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dev_err(delta->dev,
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"%s ipc: failed to decode, invalid ipc handle\n",
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pctx->name);
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return -EINVAL;
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}
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if (!rpmsg_device) {
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dev_err(delta->dev,
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"%s ipc: failed to decode, rpmsg is not initialized\n",
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pctx->name);
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return -EINVAL;
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}
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if (!param || !param->data || !param->size) {
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dev_err(delta->dev,
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"%s ipc: failed to decode, empty parameter\n",
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pctx->name);
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return -EINVAL;
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}
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if (!status || !status->data || !status->size) {
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dev_err(delta->dev,
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"%s ipc: failed to decode, empty status\n",
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pctx->name);
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return -EINVAL;
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}
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if (param->size + status->size > ctx->ipc_buf->size) {
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dev_err(delta->dev,
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"%s ipc: failed to decode, too large ipc parameter (%d bytes (param) + %d bytes (status) while max %d expected)\n",
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pctx->name,
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param->size,
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status->size,
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ctx->ipc_buf->size);
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return -EINVAL;
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}
|
||
|
|
|
||
|
|
if (!is_valid_data(ctx, param->data, param->size)) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to decode, parameter is not in expected address range (size=%d, data=%p not in %p..%p)\n",
|
||
|
|
pctx->name,
|
||
|
|
param->size,
|
||
|
|
param->data,
|
||
|
|
ctx->ipc_buf->vaddr,
|
||
|
|
ctx->ipc_buf->vaddr + ctx->ipc_buf->size - 1);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!is_valid_data(ctx, status->data, status->size)) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to decode, status is not in expected address range (size=%d, data=%p not in %p..%p)\n",
|
||
|
|
pctx->name,
|
||
|
|
status->size,
|
||
|
|
status->data,
|
||
|
|
ctx->ipc_buf->vaddr,
|
||
|
|
ctx->ipc_buf->vaddr + ctx->ipc_buf->size - 1);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* build rpmsg message */
|
||
|
|
build_msg_header(ctx, DELTA_IPC_DECODE, &msg.header);
|
||
|
|
|
||
|
|
msg.param_size = param->size;
|
||
|
|
msg.param_paddr = to_paddr(ctx, param->data);
|
||
|
|
|
||
|
|
msg.status_size = status->size;
|
||
|
|
msg.status_paddr = to_paddr(ctx, status->data);
|
||
|
|
|
||
|
|
/* send it */
|
||
|
|
ret = rpmsg_send(rpmsg_device->ept, &msg, sizeof(msg));
|
||
|
|
if (ret) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to decode, rpmsg_send failed (%d) for DELTA_IPC_DECODE (size=%d, data=%p)\n",
|
||
|
|
pctx->name,
|
||
|
|
ret, param->size, param->data);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* wait for acknowledge */
|
||
|
|
if (!wait_for_completion_timeout
|
||
|
|
(&ctx->done, msecs_to_jiffies(IPC_TIMEOUT))) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to decode, timeout waiting for DELTA_IPC_DECODE callback (size=%d, data=%p)\n",
|
||
|
|
pctx->name,
|
||
|
|
param->size, param->data);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
return -ETIMEDOUT;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* command completed, check status */
|
||
|
|
if (ctx->cb_err) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to decode, DELTA_IPC_DECODE completed but with error (%d) (size=%d, data=%p)\n",
|
||
|
|
pctx->name,
|
||
|
|
ctx->cb_err, param->size, param->data);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
void delta_ipc_close(void *hdl)
|
||
|
|
{
|
||
|
|
struct delta_ipc_ctx *ctx = to_ctx(hdl);
|
||
|
|
struct delta_ctx *pctx = to_pctx(ctx);
|
||
|
|
struct delta_dev *delta = pctx->dev;
|
||
|
|
struct rpmsg_device *rpmsg_device = delta->rpmsg_device;
|
||
|
|
struct delta_ipc_close_msg msg;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!hdl) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to close, invalid ipc handle\n",
|
||
|
|
pctx->name);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ctx->ipc_buf) {
|
||
|
|
hw_free(pctx, ctx->ipc_buf);
|
||
|
|
ctx->ipc_buf = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!rpmsg_device) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to close, rpmsg is not initialized\n",
|
||
|
|
pctx->name);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* build rpmsg message */
|
||
|
|
build_msg_header(ctx, DELTA_IPC_CLOSE, &msg.header);
|
||
|
|
|
||
|
|
/* send it */
|
||
|
|
ret = rpmsg_send(rpmsg_device->ept, &msg, sizeof(msg));
|
||
|
|
if (ret) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to close, rpmsg_send failed (%d) for DELTA_IPC_CLOSE\n",
|
||
|
|
pctx->name, ret);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* wait for acknowledge */
|
||
|
|
if (!wait_for_completion_timeout
|
||
|
|
(&ctx->done, msecs_to_jiffies(IPC_TIMEOUT))) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to close, timeout waiting for DELTA_IPC_CLOSE callback\n",
|
||
|
|
pctx->name);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* command completed, check status */
|
||
|
|
if (ctx->cb_err) {
|
||
|
|
dev_err(delta->dev,
|
||
|
|
"%s ipc: failed to close, DELTA_IPC_CLOSE completed but with error (%d)\n",
|
||
|
|
pctx->name, ctx->cb_err);
|
||
|
|
pctx->sys_errors++;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static int delta_ipc_cb(struct rpmsg_device *rpdev, void *data,
|
||
|
|
int len, void *priv, u32 src)
|
||
|
|
{
|
||
|
|
struct delta_ipc_ctx *ctx;
|
||
|
|
struct delta_ipc_cb_msg *msg;
|
||
|
|
|
||
|
|
/* sanity check */
|
||
|
|
if (!rpdev) {
|
||
|
|
dev_err(NULL, "rpdev is NULL\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!data || !len) {
|
||
|
|
dev_err(&rpdev->dev,
|
||
|
|
"unexpected empty message received from src=%d\n", src);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (len != sizeof(*msg)) {
|
||
|
|
dev_err(&rpdev->dev,
|
||
|
|
"unexpected message length received from src=%d (received %d bytes while %zu bytes expected)\n",
|
||
|
|
len, src, sizeof(*msg));
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
msg = (struct delta_ipc_cb_msg *)data;
|
||
|
|
if (msg->header.tag != IPC_SANITY_TAG) {
|
||
|
|
dev_err(&rpdev->dev,
|
||
|
|
"unexpected message tag received from src=%d (received %x tag while %x expected)\n",
|
||
|
|
src, msg->header.tag, IPC_SANITY_TAG);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx = msg_to_ctx(msg);
|
||
|
|
if (!ctx) {
|
||
|
|
dev_err(&rpdev->dev,
|
||
|
|
"unexpected message with NULL host_hdl received from src=%d\n",
|
||
|
|
src);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* if not already known, save copro instance context
|
||
|
|
* to ensure re-entrance on copro side
|
||
|
|
*/
|
||
|
|
if (!ctx->copro_hdl)
|
||
|
|
ctx->copro_hdl = msg_to_copro_hdl(msg);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* all is fine,
|
||
|
|
* update status & complete command
|
||
|
|
*/
|
||
|
|
ctx->cb_err = msg->err;
|
||
|
|
complete(&ctx->done);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int delta_ipc_probe(struct rpmsg_device *rpmsg_device)
|
||
|
|
{
|
||
|
|
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpmsg_device->dev.driver);
|
||
|
|
struct delta_dev *delta = to_delta(rpdrv);
|
||
|
|
|
||
|
|
delta->rpmsg_device = rpmsg_device;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void delta_ipc_remove(struct rpmsg_device *rpmsg_device)
|
||
|
|
{
|
||
|
|
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpmsg_device->dev.driver);
|
||
|
|
struct delta_dev *delta = to_delta(rpdrv);
|
||
|
|
|
||
|
|
delta->rpmsg_device = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct rpmsg_device_id delta_ipc_device_id_table[] = {
|
||
|
|
{.name = "rpmsg-delta"},
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct rpmsg_driver delta_rpmsg_driver = {
|
||
|
|
.drv = {.name = KBUILD_MODNAME},
|
||
|
|
.id_table = delta_ipc_device_id_table,
|
||
|
|
.probe = delta_ipc_probe,
|
||
|
|
.callback = delta_ipc_cb,
|
||
|
|
.remove = delta_ipc_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
int delta_ipc_init(struct delta_dev *delta)
|
||
|
|
{
|
||
|
|
delta->rpmsg_driver = delta_rpmsg_driver;
|
||
|
|
|
||
|
|
return register_rpmsg_driver(&delta->rpmsg_driver);
|
||
|
|
}
|
||
|
|
|
||
|
|
void delta_ipc_exit(struct delta_dev *delta)
|
||
|
|
{
|
||
|
|
unregister_rpmsg_driver(&delta->rpmsg_driver);
|
||
|
|
}
|