Re: [PATCH v3 2/5] remoteproc: imx_rproc: fix TCM io memory type

[Mathieu Poirier <mathieu.poirier@linaro.org>]

On Thu, Aug 05, 2021 at 09:59:00AM +0000, Peng Fan wrote:
> > Subject: [PATCH v3 2/5] remoteproc: imx_rproc: fix TCM io memory type
> > 
> > is_iomem was introduced in the commit 40df0a91b2a5 ("remoteproc: add
> > is_iomem to da_to_va"), but the driver seemed missed to provide the io type
> > correctly.
> > This patch updates remoteproc driver to indicate the TCM on IMX are io
> > memories. Without the change, remoteproc kick will fail.
> > 
> > Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > Cc: Peng Fan <peng.fan@nxp.com>
> > Fixes: 79806d32d5aa ("remoteproc: imx_rproc: support i.MX8MN/P")
> > Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>

Peng added his RB tag during V2 but it wasn't carried here.

> 
> Tested-by: Peng Fan <peng.fan@nxp.com>
> 
> > ---
> > ChangeLog:
> > v2->v3:
> >  * fix commit message typo and drop imx8ulp fixes tag
> >    Patch content unchanged.
> > v1->v2:
> >  * using ioremap_wc for non TCM memory
> > ---
> >  drivers/remoteproc/imx_rproc.c | 35 ++++++++++++++++++++--------------
> >  1 file changed, 21 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/remoteproc/imx_rproc.c
> > b/drivers/remoteproc/imx_rproc.c index d88f76f5305e..71dcc6dd32e4
> > 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -71,6 +71,7 @@ struct imx_rproc_mem {
> >  /* att flags */
> >  /* M4 own area. Can be mapped at probe */
> >  #define ATT_OWN		BIT(1)
> > +#define ATT_IOMEM	BIT(2)
> > 
> >  /* address translation table */
> >  struct imx_rproc_att {
> > @@ -117,7 +118,7 @@ struct imx_rproc {
> >  static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
> >  	/* dev addr , sys addr  , size	    , flags */
> >  	/* ITCM   */
> > -	{ 0x00000000, 0x007E0000, 0x00020000, ATT_OWN },
> > +	{ 0x00000000, 0x007E0000, 0x00020000, ATT_OWN | ATT_IOMEM },
> >  	/* OCRAM_S */
> >  	{ 0x00180000, 0x00180000, 0x00009000, 0 },
> >  	/* OCRAM */
> > @@ -131,7 +132,7 @@ static const struct imx_rproc_att
> > imx_rproc_att_imx8mn[] = {
> >  	/* DDR (Code) - alias */
> >  	{ 0x10000000, 0x40000000, 0x0FFE0000, 0 },
> >  	/* DTCM */
> > -	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
> > +	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN | ATT_IOMEM },
> >  	/* OCRAM_S - alias */
> >  	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
> >  	/* OCRAM */
> > @@ -147,7 +148,7 @@ static const struct imx_rproc_att
> > imx_rproc_att_imx8mn[] = {  static const struct imx_rproc_att
> > imx_rproc_att_imx8mq[] = {
> >  	/* dev addr , sys addr  , size	    , flags */
> >  	/* TCML - alias */
> > -	{ 0x00000000, 0x007e0000, 0x00020000, 0 },
> > +	{ 0x00000000, 0x007e0000, 0x00020000, ATT_IOMEM},
> >  	/* OCRAM_S */
> >  	{ 0x00180000, 0x00180000, 0x00008000, 0 },
> >  	/* OCRAM */
> > @@ -159,9 +160,9 @@ static const struct imx_rproc_att
> > imx_rproc_att_imx8mq[] = {
> >  	/* DDR (Code) - alias */
> >  	{ 0x10000000, 0x80000000, 0x0FFE0000, 0 },
> >  	/* TCML */
> > -	{ 0x1FFE0000, 0x007E0000, 0x00020000, ATT_OWN },
> > +	{ 0x1FFE0000, 0x007E0000, 0x00020000, ATT_OWN  | ATT_IOMEM},
> >  	/* TCMU */
> > -	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
> > +	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN  | ATT_IOMEM},
> >  	/* OCRAM_S */
> >  	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
> >  	/* OCRAM */
> > @@ -199,12 +200,12 @@ static const struct imx_rproc_att
> > imx_rproc_att_imx7d[] = {
> >  	/* OCRAM_PXP (Code) - alias */
> >  	{ 0x00940000, 0x00940000, 0x00008000, 0 },
> >  	/* TCML (Code) */
> > -	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
> > +	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN | ATT_IOMEM },
> >  	/* DDR (Code) - alias, first part of DDR (Data) */
> >  	{ 0x10000000, 0x80000000, 0x0FFF0000, 0 },
> > 
> >  	/* TCMU (Data) */
> > -	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
> > +	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN | ATT_IOMEM },
> >  	/* OCRAM (Data) */
> >  	{ 0x20200000, 0x00900000, 0x00020000, 0 },
> >  	/* OCRAM_EPDC (Data) */
> > @@ -218,18 +219,18 @@ static const struct imx_rproc_att
> > imx_rproc_att_imx7d[] = {  static const struct imx_rproc_att
> > imx_rproc_att_imx6sx[] = {
> >  	/* dev addr , sys addr  , size	    , flags */
> >  	/* TCML (M4 Boot Code) - alias */
> > -	{ 0x00000000, 0x007F8000, 0x00008000, 0 },
> > +	{ 0x00000000, 0x007F8000, 0x00008000, ATT_IOMEM },
> >  	/* OCRAM_S (Code) */
> >  	{ 0x00180000, 0x008F8000, 0x00004000, 0 },
> >  	/* OCRAM_S (Code) - alias */
> >  	{ 0x00180000, 0x008FC000, 0x00004000, 0 },
> >  	/* TCML (Code) */
> > -	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
> > +	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN | ATT_IOMEM },
> >  	/* DDR (Code) - alias, first part of DDR (Data) */
> >  	{ 0x10000000, 0x80000000, 0x0FFF8000, 0 },
> > 
> >  	/* TCMU (Data) */
> > -	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
> > +	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN | ATT_IOMEM },
> >  	/* OCRAM_S (Data) - alias? */
> >  	{ 0x208F8000, 0x008F8000, 0x00004000, 0 },
> >  	/* DDR (Data) */
> > @@ -341,7 +342,7 @@ static int imx_rproc_stop(struct rproc *rproc)  }
> > 
> >  static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
> > -			       size_t len, u64 *sys)
> > +			       size_t len, u64 *sys, bool *is_iomem)
> >  {
> >  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> >  	int i;
> > @@ -354,6 +355,8 @@ static int imx_rproc_da_to_sys(struct imx_rproc *priv,
> > u64 da,
> >  			unsigned int offset = da - att->da;
> > 
> >  			*sys = att->sa + offset;
> > +			if (is_iomem)
> > +				*is_iomem = att->flags & ATT_IOMEM;
> >  			return 0;
> >  		}
> >  	}
> > @@ -377,7 +380,7 @@ static void *imx_rproc_da_to_va(struct rproc *rproc,
> > u64 da, size_t len, bool *i
> >  	 * On device side we have many aliases, so we need to convert device
> >  	 * address (M4) to system bus address first.
> >  	 */
> > -	if (imx_rproc_da_to_sys(priv, da, len, &sys))
> > +	if (imx_rproc_da_to_sys(priv, da, len, &sys, is_iomem))
> >  		return NULL;
> > 
> >  	for (i = 0; i < IMX_RPROC_MEM_MAX; i++) { @@ -553,8 +556,12 @@
> > static int imx_rproc_addr_init(struct imx_rproc *priv,
> >  		if (b >= IMX_RPROC_MEM_MAX)
> >  			break;
> > 
> > -		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
> > -						     att->sa, att->size);
> > +		if (att->flags & ATT_IOMEM)
> > +			priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
> > +							     att->sa, att->size);
> > +		else
> > +			priv->mem[b].cpu_addr = devm_ioremap_wc(&pdev->dev,
> > +								att->sa, att->size);
> >  		if (!priv->mem[b].cpu_addr) {
> >  			dev_err(dev, "failed to remap %#x bytes from %#x\n", att->size,
> > att->sa);
> >  			return -ENOMEM;
> > --
> > 2.25.1
>