On Wed 06 Jan 15:23 CST 2021, Siddharth Gupta wrote: > Since the split elf blobs will always contain the hash segment, we rely on
I think it will sounds better if we add "should" in "we should rely on..." > the blob file to get the hash rather than assume that it will be present in > the mdt file. This change uses the hash index to read the appropriate elf > blob to get the hash segment. > > Signed-off-by: Siddharth Gupta <[email protected]> > --- > drivers/remoteproc/qcom_q6v5_mss.c | 4 ++-- > drivers/soc/qcom/mdt_loader.c | 38 > +++++++++++++++++++++++++++---------- > include/linux/soc/qcom/mdt_loader.h | 3 ++- > 3 files changed, 32 insertions(+), 13 deletions(-) > > diff --git a/drivers/remoteproc/qcom_q6v5_mss.c > b/drivers/remoteproc/qcom_q6v5_mss.c > index 66106ba..74c0229 100644 > --- a/drivers/remoteproc/qcom_q6v5_mss.c > +++ b/drivers/remoteproc/qcom_q6v5_mss.c > @@ -4,7 +4,7 @@ > * > * Copyright (C) 2016 Linaro Ltd. > * Copyright (C) 2014 Sony Mobile Communications AB > - * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. > + * Copyright (c) 2012-2013, 2020 The Linux Foundation. All rights reserved. > */ > > #include <linux/clk.h> > @@ -828,7 +828,7 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const > struct firmware *fw) > void *ptr; > int ret; > > - metadata = qcom_mdt_read_metadata(fw, &size); > + metadata = qcom_mdt_read_metadata(qproc->dev, fw, > qproc->hexagon_mdt_image, &size); > if (IS_ERR(metadata)) > return PTR_ERR(metadata); > > diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c > index c9bbd8c..6876c0b 100644 > --- a/drivers/soc/qcom/mdt_loader.c > +++ b/drivers/soc/qcom/mdt_loader.c > @@ -103,15 +103,18 @@ EXPORT_SYMBOL_GPL(qcom_mdt_get_size); > * > * Return: pointer to data, or ERR_PTR() > */ > -void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len) > +void *qcom_mdt_read_metadata(struct device *dev, const struct firmware *fw, > const char *firmware, > + size_t *data_len) > { > const struct elf32_phdr *phdrs; > const struct elf32_hdr *ehdr; > - size_t hash_offset; > + const struct firmware *seg_fw; > size_t hash_index; > size_t hash_size; > size_t ehdr_size; > + char *fw_name; > void *data; > + int ret; > > ehdr = (struct elf32_hdr *)fw->data; > phdrs = (struct elf32_phdr *)(ehdr + 1); > @@ -137,14 +140,29 @@ void *qcom_mdt_read_metadata(const struct firmware *fw, > size_t *data_len) > if (!data) > return ERR_PTR(-ENOMEM); > > - /* Is the header and hash already packed */ > - if (qcom_mdt_bins_are_split(fw)) > - hash_offset = phdrs[0].p_filesz; > - else > - hash_offset = phdrs[hash_index].p_offset; > - > + /* copy elf header */ > memcpy(data, fw->data, ehdr_size); > - memcpy(data + ehdr_size, fw->data + hash_offset, hash_size); > + This seems to duplicates parts of the loop in __qcom_mdt_load(), how about breaking this out to a separate static int mdt_load_segment(struct device *dev, const struct firmware *fw, int idx, void *buf, size_t len, bool is_split) Which either just memcpy from @fw or does the filename and loading dance, based on @is_split? Regards, Bjorn > + if (qcom_mdt_bins_are_split(fw)) { > + fw_name = kstrdup(firmware, GFP_KERNEL); > + if (!fw_name) { > + kfree(data); > + return ERR_PTR(-ENOMEM); > + } > + snprintf(fw_name + strlen(fw_name) - 3, 4, "b%02d", hash_index); > + > + ret = request_firmware_into_buf(&seg_fw, fw_name, dev, data + > ehdr_size, hash_size); > + kfree(fw_name); > + > + if (ret) { > + kfree(data); > + return ERR_PTR(ret); > + } > + > + release_firmware(seg_fw); > + } else { > + memcpy(data + ehdr_size, fw->data + phdrs[hash_index].p_offset, > hash_size); > + } > > *data_len = ehdr_size + hash_size; > > @@ -191,7 +209,7 @@ static int __qcom_mdt_load(struct device *dev, const > struct firmware *fw, > return -ENOMEM; > > if (pas_init) { > - metadata = qcom_mdt_read_metadata(fw, &metadata_len); > + metadata = qcom_mdt_read_metadata(dev, fw, firmware, > &metadata_len); > if (IS_ERR(metadata)) { > ret = PTR_ERR(metadata); > goto out; > diff --git a/include/linux/soc/qcom/mdt_loader.h > b/include/linux/soc/qcom/mdt_loader.h > index e600bae..04ba5e8 100644 > --- a/include/linux/soc/qcom/mdt_loader.h > +++ b/include/linux/soc/qcom/mdt_loader.h > @@ -21,6 +21,7 @@ int qcom_mdt_load_no_init(struct device *dev, const struct > firmware *fw, > const char *fw_name, int pas_id, void *mem_region, > phys_addr_t mem_phys, size_t mem_size, > phys_addr_t *reloc_base); > -void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len); > +void *qcom_mdt_read_metadata(struct device *dev, const struct firmware *fw, > const char *firmware, > + size_t *data_len); > > #endif > -- > Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
