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Commit 64b52f80 authored by Avaneesh Kumar Dwivedi's avatar Avaneesh Kumar Dwivedi
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soc: qcom: Create additional ramdump device node for SSR minidump 



This change add a new ramdump device node which is only used to collect
SSR minidump by ramdump process.

Change-Id: I3af5c15798d3c74896a499c8db30e5733743f106
Signed-off-by: default avatarAvaneesh Kumar Dwivedi <akdwived@codeaurora.org>
parent d0a863a2

drivers/soc/qcom/peripheral-loader.c

+6 −2
Original line number Diff line number Diff line
@@ -164,6 +164,9 @@ static int pil_do_minidump(struct pil_desc *desc, void *ramdump_dev) 
	int ss_mdump_seg_cnt;

	int ret, i;



	if (!ramdump_dev)

		return -ENODEV;



	memcpy(&offset, &priv->minidump, sizeof(priv->minidump));

	offset = offset + sizeof(priv->minidump->md_ss_smem_regions_baseptr);

	/* There are 3 encryption keys which also need to be dumped */
@@ -220,7 +223,8 @@ static int pil_do_minidump(struct pil_desc *desc, void *ramdump_dev) 
 * Calls the ramdump API with a list of segments generated from the addresses

 * that the descriptor corresponds to.

 */

int pil_do_ramdump(struct pil_desc *desc, void *ramdump_dev)

int pil_do_ramdump(struct pil_desc *desc,

		   void *ramdump_dev, void *minidump_dev)

{

	struct pil_priv *priv = desc->priv;

	struct pil_seg *seg;
@@ -237,7 +241,7 @@ int pil_do_ramdump(struct pil_desc *desc, void *ramdump_dev) 
	&& (__raw_readl(priv->minidump) != 0)

	&& (readb_relaxed(offset + sizeof(u32) + 2 * sizeof(u8)) == 0)) {

		pr_debug("Dumping Minidump for %s\n", desc->name);

		return pil_do_minidump(desc, ramdump_dev);

		return pil_do_minidump(desc, minidump_dev);



	}

	pr_debug("Continuing with full SSR dump for %s\n", desc->name);

drivers/soc/qcom/peripheral-loader.h

+4 −2
Original line number Diff line number Diff line
@@ -134,7 +134,8 @@ extern void pil_shutdown(struct pil_desc *desc); 
extern void pil_free_memory(struct pil_desc *desc);

extern void pil_desc_release(struct pil_desc *desc);

extern phys_addr_t pil_get_entry_addr(struct pil_desc *desc);

extern int pil_do_ramdump(struct pil_desc *desc, void *ramdump_dev);

extern int pil_do_ramdump(struct pil_desc *desc, void *ramdump_dev,

			  void *minidump_dev);

extern int pil_assign_mem_to_subsys(struct pil_desc *desc, phys_addr_t addr,

						size_t size);

extern int pil_assign_mem_to_linux(struct pil_desc *desc, phys_addr_t addr,
@@ -154,7 +155,8 @@ static inline phys_addr_t pil_get_entry_addr(struct pil_desc *desc) 
{

	return 0;

}

static inline int pil_do_ramdump(struct pil_desc *desc, void *ramdump_dev)

static inline int pil_do_ramdump(struct pil_desc *desc,

		void *ramdump_dev, void *minidump_dev)

{

	return 0;

}

drivers/soc/qcom/pil-msa.h

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ struct modem_data { 
	struct subsys_device *subsys;

	struct subsys_desc subsys_desc;

	void *ramdump_dev;

	void *minidump_dev;

	bool crash_shutdown;

	u32 pas_id;

	bool ignore_errors;

drivers/soc/qcom/pil-q6v5-mss.c

+12 −1
Original line number Diff line number Diff line
@@ -171,7 +171,8 @@ static int modem_ramdump(int enable, const struct subsys_desc *subsys) 
	if (ret)

		return ret;



	ret = pil_do_ramdump(&drv->q6->desc, drv->ramdump_dev);

	ret = pil_do_ramdump(&drv->q6->desc,

			drv->ramdump_dev, drv->minidump_dev);

	if (ret < 0)

		pr_err("Unable to dump modem fw memory (rc = %d).\n", ret);
@@ -230,9 +231,18 @@ static int pil_subsys_init(struct modem_data *drv, 
		ret = -ENOMEM;

		goto err_ramdump;

	}

	drv->minidump_dev = create_ramdump_device("md_modem", &pdev->dev);

	if (!drv->minidump_dev) {

		pr_err("%s: Unable to create a modem minidump device.\n",

			__func__);

		ret = -ENOMEM;

		goto err_minidump;

	}



	return 0;



err_minidump:

	destroy_ramdump_device(drv->ramdump_dev);

err_ramdump:

	subsys_unregister(drv->subsys);

err_subsys:
@@ -414,6 +424,7 @@ static int pil_mss_driver_exit(struct platform_device *pdev) 


	subsys_unregister(drv->subsys);

	destroy_ramdump_device(drv->ramdump_dev);

	destroy_ramdump_device(drv->minidump_dev);

	pil_desc_release(&drv->q6->desc);

	return 0;

}

drivers/soc/qcom/subsys-pil-tz.c

+1 −1
Original line number Diff line number Diff line
@@ -850,7 +850,7 @@ static int subsys_ramdump(int enable, const struct subsys_desc *subsys) 
	if (!enable)

		return 0;



	return pil_do_ramdump(&d->desc, d->ramdump_dev);

	return pil_do_ramdump(&d->desc, d->ramdump_dev, NULL);

}



static void subsys_free_memory(const struct subsys_desc *subsys)