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 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 | 181 ++++++++++++++++++++++++++++-
1 file changed, 180 insertions(+), 1 deletion(-)
diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
index e4b1e962d56ad..d0dcc0820fadd 100644
--- a/drivers/remoteproc/imx_dsp_rproc.c
+++ b/drivers/remoteproc/imx_dsp_rproc.c
@@ -715,6 +715,185 @@ 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;
+ u32 affected_mask;
+ u32 tmp;
+ int i, q, r;
+
+ /* destination must be 32bit aligned */
+ if (!IS_ALIGNED((u64)dest, 4))
+ return -EINVAL;
+
+ q = size / 4;
+ r = size % 4;
+
+ /* __iowrite32_copy use 32bit size values so divide by 4 */
+ __iowrite32_copy(dest, src, q);
+
+ if (r) {
+ affected_mask = (1 << (8 * r)) - 1;
+
+ /* 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 = ioread32(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));
+
+ iowrite32(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 affected_mask;
+ u32 tmp_val = value;
+ u32 *tmp_dst = addr;
+ u32 tmp;
+ int q, r;
+
+ /* destination must be 32bit aligned */
+ if (!IS_ALIGNED((u64)addr, 4))
+ return -EINVAL;
+
+ tmp_val |= tmp_val << 8;
+ tmp_val |= tmp_val << 16;
+
+ q = size / 4;
+ r = size % 4;
+
+ while (q--)
+ iowrite32(tmp_val, tmp_dst++);
+
+ if (r) {
+ affected_mask = (1 << (8 * r)) - 1;
+
+ /* 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 = ioread32(tmp_dst);
+ tmp &= ~affected_mask;
+
+ tmp |= (tmp_val & affected_mask);
+ iowrite32(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))
@@ -729,7 +908,7 @@ 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 2/1/2023 1:04 AM, 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.
Which platform has this limitation? This driver has been landed for
quite some time, is there any specific condition to trigger the issue?
Regards,
Peng.
>
> Signed-off-by: Iuliana Prodan <[email protected]>
>
> ---
> 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 | 181 ++++++++++++++++++++++++++++-
> 1 file changed, 180 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index e4b1e962d56ad..d0dcc0820fadd 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -715,6 +715,185 @@ 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;
> + u32 affected_mask;
> + u32 tmp;
> + int i, q, r;
> +
> + /* destination must be 32bit aligned */
> + if (!IS_ALIGNED((u64)dest, 4))
> + return -EINVAL;
> +
> + q = size / 4;
> + r = size % 4;
> +
> + /* __iowrite32_copy use 32bit size values so divide by 4 */
> + __iowrite32_copy(dest, src, q);
> +
> + if (r) {
> + affected_mask = (1 << (8 * r)) - 1;
> +
> + /* 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 = ioread32(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));
> +
> + iowrite32(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 affected_mask;
> + u32 tmp_val = value;
> + u32 *tmp_dst = addr;
> + u32 tmp;
> + int q, r;
> +
> + /* destination must be 32bit aligned */
> + if (!IS_ALIGNED((u64)addr, 4))
> + return -EINVAL;
> +
> + tmp_val |= tmp_val << 8;
> + tmp_val |= tmp_val << 16;
> +
> + q = size / 4;
> + r = size % 4;
> +
> + while (q--)
> + iowrite32(tmp_val, tmp_dst++);
> +
> + if (r) {
> + affected_mask = (1 << (8 * r)) - 1;
> +
> + /* 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 = ioread32(tmp_dst);
> + tmp &= ~affected_mask;
> +
> + tmp |= (tmp_val & affected_mask);
> + iowrite32(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))
> @@ -729,7 +908,7 @@ 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,
Hi Peng,
On 2/1/2023 2:27 AM, Peng Fan wrote:
>
>
> On 2/1/2023 1:04 AM, 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.
>
> Which platform has this limitation? This driver has been landed for
> quite some time, is there any specific condition to trigger the issue?
>
> Regards,
> Peng.
>
Any platform with HiFi DSP.
As I explained in the previous version, until now, it was used in a
limited scenario and the firmware was correctly built to respect the
write restriction - having the IRAM sections size a multiple of 4bytes.
Now, I was trying a simple hello_world sample from Zephyr, compiled with
GCC and I crashed the Kernel trying to load it on the hifi4 DSP.
Thanks,
Iulia
Hi Iuliana,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on remoteproc/rproc-next]
[also build test WARNING on linus/master v6.2-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Iuliana-Prodan-OSS/remoteproc-imx_dsp_rproc-add-custom-memory-copy-implementation-for-i-MX-DSP-Cores/20230201-011011
base: git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git rproc-next
patch link: https://lore.kernel.org/r/20230131170436.31280-1-iuliana.prodan%40oss.nxp.com
patch subject: [PATCH v2] remoteproc: imx_dsp_rproc: add custom memory copy implementation for i.MX DSP Cores
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20230204/[email protected]/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/65bca8739891378a92cf6a5774e2ad72630a4276
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Iuliana-Prodan-OSS/remoteproc-imx_dsp_rproc-add-custom-memory-copy-implementation-for-i-MX-DSP-Cores/20230201-011011
git checkout 65bca8739891378a92cf6a5774e2ad72630a4276
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/remoteproc/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
All warnings (new ones prefixed by >>):
In file included from include/linux/kernel.h:15,
from include/linux/clk.h:13,
from drivers/remoteproc/imx_dsp_rproc.c:6:
drivers/remoteproc/imx_dsp_rproc.c: In function 'imx_dsp_rproc_memcpy':
>> drivers/remoteproc/imx_dsp_rproc.c:732:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
732 | if (!IS_ALIGNED((u64)dest, 4))
| ^
include/linux/align.h:13:44: note: in definition of macro 'IS_ALIGNED'
13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
| ^
>> drivers/remoteproc/imx_dsp_rproc.c:732:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
732 | if (!IS_ALIGNED((u64)dest, 4))
| ^
include/linux/align.h:13:58: note: in definition of macro 'IS_ALIGNED'
13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
| ^
drivers/remoteproc/imx_dsp_rproc.c: In function 'imx_dsp_rproc_memset':
drivers/remoteproc/imx_dsp_rproc.c:776:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
776 | if (!IS_ALIGNED((u64)addr, 4))
| ^
include/linux/align.h:13:44: note: in definition of macro 'IS_ALIGNED'
13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
| ^
drivers/remoteproc/imx_dsp_rproc.c:776:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
776 | if (!IS_ALIGNED((u64)addr, 4))
| ^
include/linux/align.h:13:58: note: in definition of macro 'IS_ALIGNED'
13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
| ^
vim +732 drivers/remoteproc/imx_dsp_rproc.c
717
718 /*
719 * Custom memory copy implementation for i.MX DSP Cores
720 *
721 * The IRAM is part of the HiFi DSP.
722 * According to hw specs only 32-bits writes are allowed.
723 */
724 static int imx_dsp_rproc_memcpy(void *dest, const void *src, size_t size)
725 {
726 const u8 *src_byte = src;
727 u32 affected_mask;
728 u32 tmp;
729 int i, q, r;
730
731 /* destination must be 32bit aligned */
> 732 if (!IS_ALIGNED((u64)dest, 4))
733 return -EINVAL;
734
735 q = size / 4;
736 r = size % 4;
737
738 /* __iowrite32_copy use 32bit size values so divide by 4 */
739 __iowrite32_copy(dest, src, q);
740
741 if (r) {
742 affected_mask = (1 << (8 * r)) - 1;
743
744 /* first read the 32bit data of dest, then change affected
745 * bytes, and write back to dest.
746 * For unaffected bytes, it should not be changed
747 */
748 tmp = ioread32(dest + q * 4);
749 tmp &= ~affected_mask;
750
751 /* avoid reading after end of source */
752 for (i = 0; i < r; i++)
753 tmp |= (src_byte[q * 4 + i] << (8 * i));
754
755 iowrite32(tmp, dest + q * 4);
756 }
757
758 return 0;
759 }
760
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests