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remoteproc: imx_rproc: support remote cores booted before Linux Kernel

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- When remote cores are kicked before Linux Kernel, we are not able
   to get resource table from the firmware elf file, so we need to add
   rsc_table to hold the resource table published by remote cores and
   imx_rproc_get_loaded_rsc_table is to get the resource table.
 - Per remoteproc framework, add attach hook for processor in a detached
   state.
 - Add imx_rproc_detect_mode to detect remote cores' working mode to
   set the state which is required by remoteproc framework.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1617846289-13496-5-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Peng Fan 2021-04-08 09:44:49 +08:00 committed by Bjorn Andersson
parent 10a3d4079e
commit 5e4c124307
1 changed files with 45 additions and 0 deletions
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45
drivers/remoteproc/imx_rproc.c
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@ -95,6 +95,7 @@ struct imx_rproc {
struct mbox_chan *rx_ch;
struct work_struct rproc_work;
struct workqueue_struct *workqueue;
void __iomem *rsc_table;
};
static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@ -395,8 +396,26 @@ static void imx_rproc_kick(struct rproc *rproc, int vqid)
__func__, vqid, err);
}
static int imx_rproc_attach(struct rproc *rproc)
{
return 0;
}
static struct resource_table *imx_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
{
struct imx_rproc *priv = rproc->priv;
/* The resource table has already been mapped in imx_rproc_addr_init */
if (!priv->rsc_table)
return NULL;
*table_sz = SZ_1K;
return (struct resource_table *)priv->rsc_table;
}
static const struct rproc_ops imx_rproc_ops = {
.prepare = imx_rproc_prepare,
.attach = imx_rproc_attach,
.start = imx_rproc_start,
.stop = imx_rproc_stop,
.kick = imx_rproc_kick,
@ -404,6 +423,7 @@ static const struct rproc_ops imx_rproc_ops = {
.load = rproc_elf_load_segments,
.parse_fw = imx_rproc_parse_fw,
.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
.sanity_check = rproc_elf_sanity_check,
.get_boot_addr = rproc_elf_get_boot_addr,
};
@ -470,6 +490,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
}
priv->mem[b].sys_addr = res.start;
priv->mem[b].size = resource_size(&res);
if (!strcmp(node->name, "rsc_table"))
priv->rsc_table = priv->mem[b].cpu_addr;
b++;
}
@ -536,6 +558,25 @@ static void imx_rproc_free_mbox(struct rproc *rproc)
mbox_free_channel(priv->rx_ch);
}
static int imx_rproc_detect_mode(struct imx_rproc *priv)
{
const struct imx_rproc_dcfg *dcfg = priv->dcfg;
struct device *dev = priv->dev;
int ret;
u32 val;
ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
if (ret) {
dev_err(dev, "Failed to read src\n");
return ret;
}
if (!(val & dcfg->src_stop))
priv->rproc->state = RPROC_DETACHED;
return 0;
}
static int imx_rproc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -590,6 +631,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
goto err_put_mbox;
}
ret = imx_rproc_detect_mode(priv);
if (ret)
goto err_put_mbox;
priv->clk = devm_clk_get(dev, NULL);
if (IS_ERR(priv->clk)) {
dev_err(dev, "Failed to get clock\n");