From: Iuliana Prodan <[email protected]>
The IRAM is part of the HiFi DSP.
According to hardware specification only 32-bits write are allowed
otherwise we get a Kernel panic.
Therefore add a custom memory copy and memset functions to deal with
the above restriction.
Signed-off-by: Iuliana Prodan <[email protected]>
---
Changes since v4
- use GENMASK;
- s/ioread32/readl;
- s/iowrite32/writel;
- use for loop with writel instead of __iowrite32_copy;
- update multi-line comment format.
Changes since v3
- remove Reported-by
Changes since v2
- fix warning "cast from pointer to integer of different size"
reported by kernel test robot.
Changes since v1
- added missing check for cases when the memory slot is bigger than the file size;
- added a custom memset function
- removed is_iomem flag since is not used here
- updated custom memcpy function to avoid reading after end of source
---
drivers/remoteproc/imx_dsp_rproc.c | 187 ++++++++++++++++++++++++++++-
1 file changed, 186 insertions(+), 1 deletion(-)
diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
index 81d3a01e1444..dcbb957bc7ac 100644
--- a/drivers/remoteproc/imx_dsp_rproc.c
+++ b/drivers/remoteproc/imx_dsp_rproc.c
@@ -739,6 +739,191 @@ static void imx_dsp_rproc_kick(struct rproc *rproc, int vqid)
dev_err(dev, "%s: failed (%d, err:%d)\n", __func__, vqid, err);
}
+/*
+ * Custom memory copy implementation for i.MX DSP Cores
+ *
+ * The IRAM is part of the HiFi DSP.
+ * According to hw specs only 32-bits writes are allowed.
+ */
+static int imx_dsp_rproc_memcpy(void *dest, const void *src, size_t size)
+{
+ const u8 *src_byte = src;
+ const u32 *source = src;
+ u32 affected_mask;
+ u32 *dst = dest;
+ int i, q, r;
+ u32 tmp;
+
+ /* destination must be 32bit aligned */
+ if (!IS_ALIGNED((uintptr_t)dest, 4))
+ return -EINVAL;
+
+ q = size / 4;
+ r = size % 4;
+
+ /* copy data in units of 32 bits at a time */
+ for (i = 0; i < q; i++)
+ writel(source[i], &dst[i]);
+
+ if (r) {
+ affected_mask = GENMASK(8 * r, 0);
+
+ /*
+ * first read the 32bit data of dest, then change affected
+ * bytes, and write back to dest.
+ * For unaffected bytes, it should not be changed
+ */
+ tmp = readl(dest + q * 4);
+ tmp &= ~affected_mask;
+
+ /* avoid reading after end of source */
+ for (i = 0; i < r; i++)
+ tmp |= (src_byte[q * 4 + i] << (8 * i));
+
+ writel(tmp, dest + q * 4);
+ }
+
+ return 0;
+}
+
+/*
+ * Custom memset implementation for i.MX DSP Cores
+ *
+ * The IRAM is part of the HiFi DSP.
+ * According to hw specs only 32-bits writes are allowed.
+ */
+static int imx_dsp_rproc_memset(void *addr, u8 value, size_t size)
+{
+ u32 tmp_val = value;
+ u32 *tmp_dst = addr;
+ u32 affected_mask;
+ int q, r;
+ u32 tmp;
+
+ /* destination must be 32bit aligned */
+ if (!IS_ALIGNED((uintptr_t)addr, 4))
+ return -EINVAL;
+
+ tmp_val |= tmp_val << 8;
+ tmp_val |= tmp_val << 16;
+
+ q = size / 4;
+ r = size % 4;
+
+ while (q--)
+ writel(tmp_val, tmp_dst++);
+
+ if (r) {
+ affected_mask = GENMASK(8 * r, 0);
+
+ /*
+ * first read the 32bit data of addr, then change affected
+ * bytes, and write back to addr.
+ * For unaffected bytes, it should not be changed
+ */
+ tmp = readl(tmp_dst);
+ tmp &= ~affected_mask;
+
+ tmp |= (tmp_val & affected_mask);
+ writel(tmp, tmp_dst);
+ }
+
+ return 0;
+}
+
+/**
+ * imx_dsp_rproc_elf_load_segments() - load firmware segments to memory
+ * @rproc: remote processor which will be booted using these fw segments
+ * @fw: the ELF firmware image
+ *
+ * This function loads the firmware segments to memory, where the remote
+ * processor expects them.
+ *
+ * Return: 0 on success and an appropriate error code otherwise
+ */
+static int imx_dsp_rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
+{
+ struct device *dev = &rproc->dev;
+ const void *ehdr, *phdr;
+ int i, ret = 0;
+ u16 phnum;
+ const u8 *elf_data = fw->data;
+ u8 class = fw_elf_get_class(fw);
+ u32 elf_phdr_get_size = elf_size_of_phdr(class);
+
+ ehdr = elf_data;
+ phnum = elf_hdr_get_e_phnum(class, ehdr);
+ phdr = elf_data + elf_hdr_get_e_phoff(class, ehdr);
+
+ /* go through the available ELF segments */
+ for (i = 0; i < phnum; i++, phdr += elf_phdr_get_size) {
+ u64 da = elf_phdr_get_p_paddr(class, phdr);
+ u64 memsz = elf_phdr_get_p_memsz(class, phdr);
+ u64 filesz = elf_phdr_get_p_filesz(class, phdr);
+ u64 offset = elf_phdr_get_p_offset(class, phdr);
+ u32 type = elf_phdr_get_p_type(class, phdr);
+ void *ptr;
+
+ if (type != PT_LOAD || !memsz)
+ continue;
+
+ dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
+ type, da, memsz, filesz);
+
+ if (filesz > memsz) {
+ dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n",
+ filesz, memsz);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (offset + filesz > fw->size) {
+ dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n",
+ offset + filesz, fw->size);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (!rproc_u64_fit_in_size_t(memsz)) {
+ dev_err(dev, "size (%llx) does not fit in size_t type\n",
+ memsz);
+ ret = -EOVERFLOW;
+ break;
+ }
+
+ /* grab the kernel address for this device address */
+ ptr = rproc_da_to_va(rproc, da, memsz, NULL);
+ if (!ptr) {
+ dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
+ memsz);
+ ret = -EINVAL;
+ break;
+ }
+
+ /* put the segment where the remote processor expects it */
+ if (filesz) {
+ ret = imx_dsp_rproc_memcpy(ptr, elf_data + offset, filesz);
+ if (ret) {
+ dev_err(dev, "memory copy failed for da 0x%llx memsz 0x%llx\n",
+ da, memsz);
+ break;
+ }
+ }
+
+ /* zero out remaining memory for this segment */
+ if (memsz > filesz) {
+ ret = imx_dsp_rproc_memset(ptr + filesz, 0, memsz - filesz);
+ if (ret) {
+ dev_err(dev, "memset failed for da 0x%llx memsz 0x%llx\n",
+ da, memsz);
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
static int imx_dsp_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
{
if (rproc_elf_load_rsc_table(rproc, fw))
@@ -753,7 +938,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
.start = imx_dsp_rproc_start,
.stop = imx_dsp_rproc_stop,
.kick = imx_dsp_rproc_kick,
- .load = rproc_elf_load_segments,
+ .load = imx_dsp_rproc_elf_load_segments,
.parse_fw = imx_dsp_rproc_parse_fw,
.sanity_check = rproc_elf_sanity_check,
.get_boot_addr = rproc_elf_get_boot_addr,
--
2.17.1
Hi Iuliana,
On Tue, Feb 21, 2023 at 07:03:56PM +0200, Iuliana Prodan (OSS) wrote:
> From: Iuliana Prodan <[email protected]>
>
> The IRAM is part of the HiFi DSP.
> According to hardware specification only 32-bits write are allowed
> otherwise we get a Kernel panic.
>
> Therefore add a custom memory copy and memset functions to deal with
> the above restriction.
>
> Signed-off-by: Iuliana Prodan <[email protected]>
> ---
> Changes since v4
> - use GENMASK;
> - s/ioread32/readl;
> - s/iowrite32/writel;
> - use for loop with writel instead of __iowrite32_copy;
> - update multi-line comment format.
>
This looks good now. I will queue this on March 13th when 6.3-rc2 is out.
Thanks,
Mathieu
> Changes since v3
> - remove Reported-by
>
> Changes since v2
> - fix warning "cast from pointer to integer of different size"
> reported by kernel test robot.
>
> Changes since v1
> - added missing check for cases when the memory slot is bigger than the file size;
> - added a custom memset function
> - removed is_iomem flag since is not used here
> - updated custom memcpy function to avoid reading after end of source
> ---
> drivers/remoteproc/imx_dsp_rproc.c | 187 ++++++++++++++++++++++++++++-
> 1 file changed, 186 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index 81d3a01e1444..dcbb957bc7ac 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -739,6 +739,191 @@ static void imx_dsp_rproc_kick(struct rproc *rproc, int vqid)
> dev_err(dev, "%s: failed (%d, err:%d)\n", __func__, vqid, err);
> }
>
> +/*
> + * Custom memory copy implementation for i.MX DSP Cores
> + *
> + * The IRAM is part of the HiFi DSP.
> + * According to hw specs only 32-bits writes are allowed.
> + */
> +static int imx_dsp_rproc_memcpy(void *dest, const void *src, size_t size)
> +{
> + const u8 *src_byte = src;
> + const u32 *source = src;
> + u32 affected_mask;
> + u32 *dst = dest;
> + int i, q, r;
> + u32 tmp;
> +
> + /* destination must be 32bit aligned */
> + if (!IS_ALIGNED((uintptr_t)dest, 4))
> + return -EINVAL;
> +
> + q = size / 4;
> + r = size % 4;
> +
> + /* copy data in units of 32 bits at a time */
> + for (i = 0; i < q; i++)
> + writel(source[i], &dst[i]);
> +
> + if (r) {
> + affected_mask = GENMASK(8 * r, 0);
> +
> + /*
> + * first read the 32bit data of dest, then change affected
> + * bytes, and write back to dest.
> + * For unaffected bytes, it should not be changed
> + */
> + tmp = readl(dest + q * 4);
> + tmp &= ~affected_mask;
> +
> + /* avoid reading after end of source */
> + for (i = 0; i < r; i++)
> + tmp |= (src_byte[q * 4 + i] << (8 * i));
> +
> + writel(tmp, dest + q * 4);
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * Custom memset implementation for i.MX DSP Cores
> + *
> + * The IRAM is part of the HiFi DSP.
> + * According to hw specs only 32-bits writes are allowed.
> + */
> +static int imx_dsp_rproc_memset(void *addr, u8 value, size_t size)
> +{
> + u32 tmp_val = value;
> + u32 *tmp_dst = addr;
> + u32 affected_mask;
> + int q, r;
> + u32 tmp;
> +
> + /* destination must be 32bit aligned */
> + if (!IS_ALIGNED((uintptr_t)addr, 4))
> + return -EINVAL;
> +
> + tmp_val |= tmp_val << 8;
> + tmp_val |= tmp_val << 16;
> +
> + q = size / 4;
> + r = size % 4;
> +
> + while (q--)
> + writel(tmp_val, tmp_dst++);
> +
> + if (r) {
> + affected_mask = GENMASK(8 * r, 0);
> +
> + /*
> + * first read the 32bit data of addr, then change affected
> + * bytes, and write back to addr.
> + * For unaffected bytes, it should not be changed
> + */
> + tmp = readl(tmp_dst);
> + tmp &= ~affected_mask;
> +
> + tmp |= (tmp_val & affected_mask);
> + writel(tmp, tmp_dst);
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * imx_dsp_rproc_elf_load_segments() - load firmware segments to memory
> + * @rproc: remote processor which will be booted using these fw segments
> + * @fw: the ELF firmware image
> + *
> + * This function loads the firmware segments to memory, where the remote
> + * processor expects them.
> + *
> + * Return: 0 on success and an appropriate error code otherwise
> + */
> +static int imx_dsp_rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
> +{
> + struct device *dev = &rproc->dev;
> + const void *ehdr, *phdr;
> + int i, ret = 0;
> + u16 phnum;
> + const u8 *elf_data = fw->data;
> + u8 class = fw_elf_get_class(fw);
> + u32 elf_phdr_get_size = elf_size_of_phdr(class);
> +
> + ehdr = elf_data;
> + phnum = elf_hdr_get_e_phnum(class, ehdr);
> + phdr = elf_data + elf_hdr_get_e_phoff(class, ehdr);
> +
> + /* go through the available ELF segments */
> + for (i = 0; i < phnum; i++, phdr += elf_phdr_get_size) {
> + u64 da = elf_phdr_get_p_paddr(class, phdr);
> + u64 memsz = elf_phdr_get_p_memsz(class, phdr);
> + u64 filesz = elf_phdr_get_p_filesz(class, phdr);
> + u64 offset = elf_phdr_get_p_offset(class, phdr);
> + u32 type = elf_phdr_get_p_type(class, phdr);
> + void *ptr;
> +
> + if (type != PT_LOAD || !memsz)
> + continue;
> +
> + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
> + type, da, memsz, filesz);
> +
> + if (filesz > memsz) {
> + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n",
> + filesz, memsz);
> + ret = -EINVAL;
> + break;
> + }
> +
> + if (offset + filesz > fw->size) {
> + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n",
> + offset + filesz, fw->size);
> + ret = -EINVAL;
> + break;
> + }
> +
> + if (!rproc_u64_fit_in_size_t(memsz)) {
> + dev_err(dev, "size (%llx) does not fit in size_t type\n",
> + memsz);
> + ret = -EOVERFLOW;
> + break;
> + }
> +
> + /* grab the kernel address for this device address */
> + ptr = rproc_da_to_va(rproc, da, memsz, NULL);
> + if (!ptr) {
> + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
> + memsz);
> + ret = -EINVAL;
> + break;
> + }
> +
> + /* put the segment where the remote processor expects it */
> + if (filesz) {
> + ret = imx_dsp_rproc_memcpy(ptr, elf_data + offset, filesz);
> + if (ret) {
> + dev_err(dev, "memory copy failed for da 0x%llx memsz 0x%llx\n",
> + da, memsz);
> + break;
> + }
> + }
> +
> + /* zero out remaining memory for this segment */
> + if (memsz > filesz) {
> + ret = imx_dsp_rproc_memset(ptr + filesz, 0, memsz - filesz);
> + if (ret) {
> + dev_err(dev, "memset failed for da 0x%llx memsz 0x%llx\n",
> + da, memsz);
> + break;
> + }
> + }
> + }
> +
> + return ret;
> +}
> +
> static int imx_dsp_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
> {
> if (rproc_elf_load_rsc_table(rproc, fw))
> @@ -753,7 +938,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
> .start = imx_dsp_rproc_start,
> .stop = imx_dsp_rproc_stop,
> .kick = imx_dsp_rproc_kick,
> - .load = rproc_elf_load_segments,
> + .load = imx_dsp_rproc_elf_load_segments,
> .parse_fw = imx_dsp_rproc_parse_fw,
> .sanity_check = rproc_elf_sanity_check,
> .get_boot_addr = rproc_elf_get_boot_addr,
> --
> 2.17.1
>
On Wed, Mar 01, 2023 at 11:49:16AM -0700, Mathieu Poirier wrote:
> Hi Iuliana,
>
> On Tue, Feb 21, 2023 at 07:03:56PM +0200, Iuliana Prodan (OSS) wrote:
> > From: Iuliana Prodan <[email protected]>
> >
> > The IRAM is part of the HiFi DSP.
> > According to hardware specification only 32-bits write are allowed
> > otherwise we get a Kernel panic.
> >
> > Therefore add a custom memory copy and memset functions to deal with
> > the above restriction.
> >
> > Signed-off-by: Iuliana Prodan <[email protected]>
> > ---
> > Changes since v4
> > - use GENMASK;
> > - s/ioread32/readl;
> > - s/iowrite32/writel;
> > - use for loop with writel instead of __iowrite32_copy;
> > - update multi-line comment format.
> >
>
> This looks good now. I will queue this on March 13th when 6.3-rc2 is out.
>
And out of curiosity, are the remote processors handled by imx_rproc.c also have
the same 32-bit write constraints? If so, it would be nice to have a patch that
fixes that as well. In such a case, imx_dsp_rproc_memcpy() and
imx_dsp_rproc_memset() should be renamed to something more generic and re-used
in imx_rproc.c.
> Thanks,
> Mathieu
>
> > Changes since v3
> > - remove Reported-by
> >
> > Changes since v2
> > - fix warning "cast from pointer to integer of different size"
> > reported by kernel test robot.
> >
> > Changes since v1
> > - added missing check for cases when the memory slot is bigger than the file size;
> > - added a custom memset function
> > - removed is_iomem flag since is not used here
> > - updated custom memcpy function to avoid reading after end of source
> > ---
> > drivers/remoteproc/imx_dsp_rproc.c | 187 ++++++++++++++++++++++++++++-
> > 1 file changed, 186 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> > index 81d3a01e1444..dcbb957bc7ac 100644
> > --- a/drivers/remoteproc/imx_dsp_rproc.c
> > +++ b/drivers/remoteproc/imx_dsp_rproc.c
> > @@ -739,6 +739,191 @@ static void imx_dsp_rproc_kick(struct rproc *rproc, int vqid)
> > dev_err(dev, "%s: failed (%d, err:%d)\n", __func__, vqid, err);
> > }
> >
> > +/*
> > + * Custom memory copy implementation for i.MX DSP Cores
> > + *
> > + * The IRAM is part of the HiFi DSP.
> > + * According to hw specs only 32-bits writes are allowed.
> > + */
> > +static int imx_dsp_rproc_memcpy(void *dest, const void *src, size_t size)
> > +{
> > + const u8 *src_byte = src;
> > + const u32 *source = src;
> > + u32 affected_mask;
> > + u32 *dst = dest;
> > + int i, q, r;
> > + u32 tmp;
> > +
> > + /* destination must be 32bit aligned */
> > + if (!IS_ALIGNED((uintptr_t)dest, 4))
> > + return -EINVAL;
> > +
> > + q = size / 4;
> > + r = size % 4;
> > +
> > + /* copy data in units of 32 bits at a time */
> > + for (i = 0; i < q; i++)
> > + writel(source[i], &dst[i]);
> > +
> > + if (r) {
> > + affected_mask = GENMASK(8 * r, 0);
> > +
> > + /*
> > + * first read the 32bit data of dest, then change affected
> > + * bytes, and write back to dest.
> > + * For unaffected bytes, it should not be changed
> > + */
> > + tmp = readl(dest + q * 4);
> > + tmp &= ~affected_mask;
> > +
> > + /* avoid reading after end of source */
> > + for (i = 0; i < r; i++)
> > + tmp |= (src_byte[q * 4 + i] << (8 * i));
> > +
> > + writel(tmp, dest + q * 4);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/*
> > + * Custom memset implementation for i.MX DSP Cores
> > + *
> > + * The IRAM is part of the HiFi DSP.
> > + * According to hw specs only 32-bits writes are allowed.
> > + */
> > +static int imx_dsp_rproc_memset(void *addr, u8 value, size_t size)
> > +{
> > + u32 tmp_val = value;
> > + u32 *tmp_dst = addr;
> > + u32 affected_mask;
> > + int q, r;
> > + u32 tmp;
> > +
> > + /* destination must be 32bit aligned */
> > + if (!IS_ALIGNED((uintptr_t)addr, 4))
> > + return -EINVAL;
> > +
> > + tmp_val |= tmp_val << 8;
> > + tmp_val |= tmp_val << 16;
> > +
> > + q = size / 4;
> > + r = size % 4;
> > +
> > + while (q--)
> > + writel(tmp_val, tmp_dst++);
> > +
> > + if (r) {
> > + affected_mask = GENMASK(8 * r, 0);
> > +
> > + /*
> > + * first read the 32bit data of addr, then change affected
> > + * bytes, and write back to addr.
> > + * For unaffected bytes, it should not be changed
> > + */
> > + tmp = readl(tmp_dst);
> > + tmp &= ~affected_mask;
> > +
> > + tmp |= (tmp_val & affected_mask);
> > + writel(tmp, tmp_dst);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * imx_dsp_rproc_elf_load_segments() - load firmware segments to memory
> > + * @rproc: remote processor which will be booted using these fw segments
> > + * @fw: the ELF firmware image
> > + *
> > + * This function loads the firmware segments to memory, where the remote
> > + * processor expects them.
> > + *
> > + * Return: 0 on success and an appropriate error code otherwise
> > + */
> > +static int imx_dsp_rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
> > +{
> > + struct device *dev = &rproc->dev;
> > + const void *ehdr, *phdr;
> > + int i, ret = 0;
> > + u16 phnum;
> > + const u8 *elf_data = fw->data;
> > + u8 class = fw_elf_get_class(fw);
> > + u32 elf_phdr_get_size = elf_size_of_phdr(class);
> > +
> > + ehdr = elf_data;
> > + phnum = elf_hdr_get_e_phnum(class, ehdr);
> > + phdr = elf_data + elf_hdr_get_e_phoff(class, ehdr);
> > +
> > + /* go through the available ELF segments */
> > + for (i = 0; i < phnum; i++, phdr += elf_phdr_get_size) {
> > + u64 da = elf_phdr_get_p_paddr(class, phdr);
> > + u64 memsz = elf_phdr_get_p_memsz(class, phdr);
> > + u64 filesz = elf_phdr_get_p_filesz(class, phdr);
> > + u64 offset = elf_phdr_get_p_offset(class, phdr);
> > + u32 type = elf_phdr_get_p_type(class, phdr);
> > + void *ptr;
> > +
> > + if (type != PT_LOAD || !memsz)
> > + continue;
> > +
> > + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
> > + type, da, memsz, filesz);
> > +
> > + if (filesz > memsz) {
> > + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n",
> > + filesz, memsz);
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + if (offset + filesz > fw->size) {
> > + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n",
> > + offset + filesz, fw->size);
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + if (!rproc_u64_fit_in_size_t(memsz)) {
> > + dev_err(dev, "size (%llx) does not fit in size_t type\n",
> > + memsz);
> > + ret = -EOVERFLOW;
> > + break;
> > + }
> > +
> > + /* grab the kernel address for this device address */
> > + ptr = rproc_da_to_va(rproc, da, memsz, NULL);
> > + if (!ptr) {
> > + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
> > + memsz);
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + /* put the segment where the remote processor expects it */
> > + if (filesz) {
> > + ret = imx_dsp_rproc_memcpy(ptr, elf_data + offset, filesz);
> > + if (ret) {
> > + dev_err(dev, "memory copy failed for da 0x%llx memsz 0x%llx\n",
> > + da, memsz);
> > + break;
> > + }
> > + }
> > +
> > + /* zero out remaining memory for this segment */
> > + if (memsz > filesz) {
> > + ret = imx_dsp_rproc_memset(ptr + filesz, 0, memsz - filesz);
> > + if (ret) {
> > + dev_err(dev, "memset failed for da 0x%llx memsz 0x%llx\n",
> > + da, memsz);
> > + break;
> > + }
> > + }
> > + }
> > +
> > + return ret;
> > +}
> > +
> > static int imx_dsp_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
> > {
> > if (rproc_elf_load_rsc_table(rproc, fw))
> > @@ -753,7 +938,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
> > .start = imx_dsp_rproc_start,
> > .stop = imx_dsp_rproc_stop,
> > .kick = imx_dsp_rproc_kick,
> > - .load = rproc_elf_load_segments,
> > + .load = imx_dsp_rproc_elf_load_segments,
> > .parse_fw = imx_dsp_rproc_parse_fw,
> > .sanity_check = rproc_elf_sanity_check,
> > .get_boot_addr = rproc_elf_get_boot_addr,
> > --
> > 2.17.1
> >
Hi Mathieu,
On 3/1/2023 8:56 PM, Mathieu Poirier wrote:
> On Wed, Mar 01, 2023 at 11:49:16AM -0700, Mathieu Poirier wrote:
>> Hi Iuliana,
>>
>> On Tue, Feb 21, 2023 at 07:03:56PM +0200, Iuliana Prodan (OSS) wrote:
>>> From: Iuliana Prodan <[email protected]>
>>>
>>> The IRAM is part of the HiFi DSP.
>>> According to hardware specification only 32-bits write are allowed
>>> otherwise we get a Kernel panic.
>>>
>>> Therefore add a custom memory copy and memset functions to deal with
>>> the above restriction.
>>>
>>> Signed-off-by: Iuliana Prodan <[email protected]>
>>> ---
>>> Changes since v4
>>> - use GENMASK;
>>> - s/ioread32/readl;
>>> - s/iowrite32/writel;
>>> - use for loop with writel instead of __iowrite32_copy;
>>> - update multi-line comment format.
>>>
>> This looks good now. I will queue this on March 13th when 6.3-rc2 is out.
>>
> And out of curiosity, are the remote processors handled by imx_rproc.c also have
> the same 32-bit write constraints? If so, it would be nice to have a patch that
> fixes that as well. In such a case, imx_dsp_rproc_memcpy() and
> imx_dsp_rproc_memset() should be renamed to something more generic and re-used
> in imx_rproc.c.
None that I know of.
But, this restriction applies to any core who's writing to IRAM.
When one is writing from anywhere else in the system to IRAM, this is a
PIF write.
And the inbound PIF writes are 32-bits at a time.
Thanks,
Iulia
On Wed, Mar 1, 2023 at 9:11 PM Mathieu Poirier
<[email protected]> wrote:
>
> On Wed, Mar 01, 2023 at 11:49:16AM -0700, Mathieu Poirier wrote:
> > Hi Iuliana,
> >
> > On Tue, Feb 21, 2023 at 07:03:56PM +0200, Iuliana Prodan (OSS) wrote:
> > > From: Iuliana Prodan <[email protected]>
> > >
> > > The IRAM is part of the HiFi DSP.
> > > According to hardware specification only 32-bits write are allowed
> > > otherwise we get a Kernel panic.
> > >
> > > Therefore add a custom memory copy and memset functions to deal with
> > > the above restriction.
> > >
> > > Signed-off-by: Iuliana Prodan <[email protected]>
> > > ---
> > > Changes since v4
> > > - use GENMASK;
> > > - s/ioread32/readl;
> > > - s/iowrite32/writel;
> > > - use for loop with writel instead of __iowrite32_copy;
> > > - update multi-line comment format.
> > >
> >
> > This looks good now. I will queue this on March 13th when 6.3-rc2 is out.
> >
>
> And out of curiosity, are the remote processors handled by imx_rproc.c also have
> the same 32-bit write constraints? If so, it would be nice to have a patch that
> fixes that as well. In such a case, imx_dsp_rproc_memcpy() and
> imx_dsp_rproc_memset() should be renamed to something more generic and re-used
> in imx_rproc.c.
Paging Peng Fan.
imx_rproc handles M4/M7 cores.
imx_dsp_rproc handles HIFI4 DSP cores.
From what I experienced 32 bit read/writes are only mandatory for
certain memory areas
that fall inside the HIFI4 address spaces but this doesn't happen for
M4/M7 memory maps.
thanks,
Daniel.