Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1570216

[PATCH 1/5] remoteproc: qcom: q6v5: Decouple driver from MDT loader

Show all headers | View raw

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>
---
 drivers/remoteproc/Kconfig         |   1 -
 drivers/remoteproc/qcom_q6v5_pil.c | 149 +++++++++++++++++++++++--------------
 2 files changed, 92 insertions(+), 58 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 79a8a371a2fb..db341028f2d1 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -37,7 +37,7 @@
 
 #include <linux/qcom_scm.h>
 
-#define MPSS_FIRMWARE_NAME		"modem.mdt"
+#define MPSS_FIRMWARE_NAME		"modem"
 
 #define MPSS_CRASH_REASON_SMEM		421
 
@@ -277,6 +277,16 @@ 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 +297,7 @@ 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,
 };
 
@@ -464,46 +474,109 @@ 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 boot_addr;
-	phys_addr_t fw_addr;
-	bool relocate;
+	phys_addr_t mpss_reloc;
+	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, MPSS_FIRMWARE_NAME ".mdt", qproc->dev);
+	if (ret < 0) {
+		dev_err(qproc->dev, "unable to load " MPSS_FIRMWARE_NAME ".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_memsz)
+		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;
 
+		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),
+				 MPSS_FIRMWARE_NAME ".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) {
-			writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
+			writel(mpss_reloc, qproc->rmb_base + RMB_PMI_CODE_START_REG);
 			writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
 		}
 
@@ -517,44 +590,6 @@ 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);
 
-- 
2.11.0

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 1/5] remoteproc: qcom: q6v5: Decouple driver from MDT loader Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 02:00 +0100
  [PATCH 4/5] remoteproc: qcom-common: Extract non-mdt related helper Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 02:00 +0100
  [PATCH 2/5] remoteproc: qcom: mdt_loader: Don't overwrite firmware object Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 02:00 +0100
  [PATCH 5/5] soc/qcom: Move qcom_mdt_loader from remoteproc Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 02:00 +0100
    Re: [PATCH 5/5] soc/qcom: Move qcom_mdt_loader from remoteproc Andy Gross <andy.gross@linaro.org> - 2017-02-02 00:30 +0100
  [PATCH 3/5] remoteproc: qcom: mdt_loader: Refactor MDT loader Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 02:00 +0100
    Re: [PATCH 3/5] remoteproc: qcom: mdt_loader: Refactor MDT loader Stanimir Varbanov <stanimir.varbanov@linaro.org> - 2017-02-02 16:30 +0100
    Re: [PATCH 3/5] remoteproc: qcom: mdt_loader: Refactor MDT loader Stanimir Varbanov <stanimir.varbanov@linaro.org> - 2017-02-08 11:40 +0100

csiph-web