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remoteproc: qcom: q6v5: Decouple driver from MDT loader

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Rather than duplicating half of the MDT loader in the validation step
move the entire MDT parser into the q6v5 driver. This allows us to make
the shared MDT-loader call the SCM PAS operations directly which
simplifies the client code and allows for better reuse of the code.

Cc: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson 2017-01-26 13:58:35 -08:00
parent 2bb5d90699
commit e7fd252262
2 changed files with 90 additions and 57 deletions
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1
drivers/remoteproc/Kconfig
View File

@ -92,7 +92,6 @@ config QCOM_Q6V5_PIL
depends on QCOM_SMEM
depends on REMOTEPROC
select MFD_SYSCON
select QCOM_MDT_LOADER
select QCOM_SCM
help
Say y here to support the Qualcomm Peripherial Image Loader for the

146
drivers/remoteproc/qcom_q6v5_pil.c
View File

@ -37,8 +37,6 @@
#include <linux/qcom_scm.h>
#define MPSS_FIRMWARE_NAME "modem.mdt"
#define MPSS_CRASH_REASON_SMEM 421
/* RMB Status Register Values */
@ -277,6 +275,16 @@ static void q6v5_clk_disable(struct device *dev,
clk_disable_unprepare(clks[i]);
}
static struct resource_table *q6v5_find_rsc_table(struct rproc *rproc,
const struct firmware *fw,
int *tablesz)
{
static struct resource_table table = { .ver = 1, };
*tablesz = sizeof(table);
return &table;
}
static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
{
struct q6v5 *qproc = rproc->priv;
@ -287,7 +295,7 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
}
static const struct rproc_fw_ops q6v5_fw_ops = {
.find_rsc_table = qcom_mdt_find_rsc_table,
.find_rsc_table = q6v5_find_rsc_table,
.load = q6v5_load,
};
@ -464,45 +472,109 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
return ret < 0 ? ret : 0;
}
static int q6v5_mpss_validate(struct q6v5 *qproc, const struct firmware *fw)
static bool q6v5_phdr_valid(const struct elf32_phdr *phdr)
{
if (phdr->p_type != PT_LOAD)
return false;
if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
return false;
if (!phdr->p_memsz)
return false;
return true;
}
static int q6v5_mpss_load(struct q6v5 *qproc)
{
const struct elf32_phdr *phdrs;
const struct elf32_phdr *phdr;
const struct firmware *seg_fw;
const struct firmware *fw;
struct elf32_hdr *ehdr;
phys_addr_t mpss_reloc;
phys_addr_t boot_addr;
phys_addr_t fw_addr;
bool relocate;
phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
phys_addr_t max_addr = 0;
bool relocate = false;
char seg_name[10];
size_t offset;
size_t size;
void *ptr;
int ret;
int i;
ret = qcom_mdt_parse(fw, &fw_addr, NULL, &relocate);
if (ret) {
dev_err(qproc->dev, "failed to parse mdt header\n");
ret = request_firmware(&fw, "modem.mdt", qproc->dev);
if (ret < 0) {
dev_err(qproc->dev, "unable to load modem.mdt\n");
return ret;
}
if (relocate)
boot_addr = qproc->mpss_phys;
else
boot_addr = fw_addr;
/* Initialize the RMB validator */
writel(0, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
ret = q6v5_mpss_init_image(qproc, fw);
if (ret)
goto release_firmware;
ehdr = (struct elf32_hdr *)fw->data;
phdrs = (struct elf32_phdr *)(ehdr + 1);
for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
for (i = 0; i < ehdr->e_phnum; i++) {
phdr = &phdrs[i];
if (phdr->p_type != PT_LOAD)
if (!q6v5_phdr_valid(phdr))
continue;
if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
relocate = true;
if (phdr->p_paddr < min_addr)
min_addr = phdr->p_paddr;
if (phdr->p_paddr + phdr->p_memsz > max_addr)
max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
}
mpss_reloc = relocate ? min_addr : qproc->mpss_phys;
for (i = 0; i < ehdr->e_phnum; i++) {
phdr = &phdrs[i];
if (!q6v5_phdr_valid(phdr))
continue;
if (!phdr->p_memsz)
continue;
offset = phdr->p_paddr - mpss_reloc;
if (offset < 0 || offset + phdr->p_memsz > qproc->mpss_size) {
dev_err(qproc->dev, "segment outside memory range\n");
ret = -EINVAL;
goto release_firmware;
}
ptr = qproc->mpss_region + offset;
if (phdr->p_filesz) {
snprintf(seg_name, sizeof(seg_name), "modem.b%02d", i);
ret = request_firmware(&seg_fw, seg_name, qproc->dev);
if (ret) {
dev_err(qproc->dev, "failed to load %s\n", seg_name);
goto release_firmware;
}
memcpy(ptr, seg_fw->data, seg_fw->size);
release_firmware(seg_fw);
}
if (phdr->p_memsz > phdr->p_filesz) {
memset(ptr + phdr->p_filesz, 0,
phdr->p_memsz - phdr->p_filesz);
}
size = readl(qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
if (!size) {
boot_addr = relocate ? qproc->mpss_phys : min_addr;
writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
}
@ -517,44 +589,6 @@ static int q6v5_mpss_validate(struct q6v5 *qproc, const struct firmware *fw)
else if (ret < 0)
dev_err(qproc->dev, "MPSS authentication failed: %d\n", ret);
return ret < 0 ? ret : 0;
}
static int q6v5_mpss_load(struct q6v5 *qproc)
{
const struct firmware *fw;
phys_addr_t fw_addr;
bool relocate;
int ret;
ret = request_firmware(&fw, MPSS_FIRMWARE_NAME, qproc->dev);
if (ret < 0) {
dev_err(qproc->dev, "unable to load " MPSS_FIRMWARE_NAME "\n");
return ret;
}
ret = qcom_mdt_parse(fw, &fw_addr, NULL, &relocate);
if (ret) {
dev_err(qproc->dev, "failed to parse mdt header\n");
goto release_firmware;
}
if (relocate)
qproc->mpss_reloc = fw_addr;
/* Initialize the RMB validator */
writel(0, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
ret = q6v5_mpss_init_image(qproc, fw);
if (ret)
goto release_firmware;
ret = qcom_mdt_load(qproc->rproc, fw, MPSS_FIRMWARE_NAME);
if (ret)
goto release_firmware;
ret = q6v5_mpss_validate(qproc, fw);
release_firmware:
release_firmware(fw);