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authorBjorn Andersson <bjorn.andersson@linaro.org>2017-01-27 00:58:35 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2017-02-06 19:57:19 +0300
commite7fd25226295270cc248254e7406d1e19181aea9 (patch)
treebada9c05a57974f4158355926b809dfc5f49179e /drivers/remoteproc
parent2bb5d9069999a2c2195a05f4aa3da7f14ea3102d (diff)
downloadlinux-e7fd25226295270cc248254e7406d1e19181aea9.tar.xz
remoteproc: qcom: q6v5: Decouple driver from MDT loader
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>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/Kconfig1
-rw-r--r--drivers/remoteproc/qcom_q6v5_pil.c146
2 files changed, 90 insertions, 57 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index a5e888043f1f..454fd9a4dd96 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -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
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index b9ce66e28f8b..83a78daf55ef 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -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)
- continue;
+ if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
+ relocate = true;
+
+ if (phdr->p_paddr < min_addr)
+ min_addr = phdr->p_paddr;
- if (!phdr->p_memsz)
+ 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;
+ 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);