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Commit ac413c70 authored by Sarangdhar Joshi's avatar Sarangdhar Joshi
Browse files

soc: qcom: ddr-health: add a structure to pass info to rpm 



Driver needs to send address and size info to RPM. Add a structure to send
this information to rpm with a single kvp resource.

Change-Id: Ic8f285374926f8f8a462fc7a7371771841888649
Signed-off-by: default avatarSarangdhar Joshi <spjoshi@codeaurora.org>
parent de6c83ce

drivers/soc/qcom/ddr-health.c

+56 −25
Original line number Diff line number Diff line
@@ -18,88 +18,119 @@ 
#define RPM_MISC_REQ_TYPE	0x6373696d

#define RPM_MISC_REQ_DDR_HEALTH 0x31726464



static unsigned long mem_size;

static uint32_t mem_size;

static int ddr_health_set(const char *val, struct kernel_param *kp);

module_param_call(mem_size, ddr_health_set, param_get_ulong,

module_param_call(mem_size, ddr_health_set, param_get_uint,

		  &mem_size, 0644);



struct ddr_health {

	uint64_t    addr;

	uint32_t    size;

	uint32_t    reserved;

};



static struct mutex lock;

static struct ddr_health *ddr_health;

static struct msm_rpm_kvp rpm_kvp;



static int ddr_health_set(const char *val, struct kernel_param *kp)

{

	int	 ret;

	void	 *virt;

	phys_addr_t addr = 0;

	uint64_t old_addr = 0;

	uint32_t old_size = 0;



	mutex_lock(&lock);

	ret = param_set_ulong(val, kp);

	ret = param_set_uint(val, kp);

	if (ret) {

		pr_err("ddr-health: error setting value %d\n", ret);

		mutex_unlock(&lock);

		return ret;

	}



	if (rpm_kvp.data)

		addr = (phys_addr_t)rpm_kvp.data;

	if (rpm_kvp.data) {

		ddr_health = (struct ddr_health *)rpm_kvp.data;

		old_addr = ddr_health->addr;

		old_size = ddr_health->size;

	}



	rpm_kvp.key = RPM_MISC_REQ_DDR_HEALTH;



	if (mem_size) {

		virt = kzalloc(mem_size, GFP_KERNEL);

		if (!virt) {

			pr_err("ddr-health: failed to alloc mem %lx\n",

			pr_err("ddr-health: failed to alloc mem request %x\n",

			       mem_size);

			mutex_unlock(&lock);

			return -ENOMEM;

		}



		rpm_kvp.length = (uint32_t)mem_size;

		rpm_kvp.data = (void *)virt_to_phys(virt);

		ddr_health->addr = (uint64_t)virt_to_phys(virt);

		ddr_health->size = mem_size;



		rpm_kvp.length = sizeof(struct ddr_health);

		rpm_kvp.data = (void *)ddr_health;



		ret = msm_rpm_send_message(MSM_RPM_CTX_ACTIVE_SET,

					   RPM_MISC_REQ_TYPE, 0, &rpm_kvp, 1);

		if (ret) {

			kfree(phys_to_virt((phys_addr_t)rpm_kvp.data));

			rpm_kvp.data = 0;

			pr_err("ddr-health: send buf to RPM failed %d, %lx\n",

			pr_err("ddr-health: send buf to RPM failed %d, %x\n",

			       ret, mem_size);

			mutex_unlock(&lock);

			return ret;

			kfree(virt);

			goto err;

		}

	} else {

		rpm_kvp.length = 0;

		rpm_kvp.data = 0;

		ddr_health->addr = 0;

		ddr_health->size = 0;



		rpm_kvp.length = sizeof(struct ddr_health);

		rpm_kvp.data = (void *)ddr_health;



		ret = msm_rpm_send_message(MSM_RPM_CTX_ACTIVE_SET,

					   RPM_MISC_REQ_TYPE, 0, &rpm_kvp, 1);

		if (ret) {

			pr_err("ddr-health: send nobuf to RPM failed %d,%lx\n",

			pr_err("ddr-health: send nobuf to RPM failed %d, %x\n",

			       ret, mem_size);

			mutex_unlock(&lock);

			return ret;

			goto err;

		}

	}



	if (addr)

		kfree(phys_to_virt(addr));

	if (old_addr)

		kfree(phys_to_virt((phys_addr_t)old_addr));



	mutex_unlock(&lock);

	return 0;

err:

	ddr_health->addr = old_addr;

	ddr_health->size = old_size;

	mutex_unlock(&lock);

	return ret;

}



static int __init ddr_health_init(void)

{

	mutex_init(&lock);



	ddr_health = kzalloc(sizeof(*ddr_health), GFP_KERNEL);

	if (!ddr_health) {

		pr_err("ddr-health: failed to alloc mem\n");

		return -ENOMEM;

	}



	return 0;

}

module_init(ddr_health_init);



static void __exit ddr_health_exit(void)

{

	if (rpm_kvp.data)

		kfree(phys_to_virt((phys_addr_t)rpm_kvp.data));

	if (rpm_kvp.data) {

		ddr_health = (struct ddr_health *)rpm_kvp.data;



		if (ddr_health->addr)

			kfree(phys_to_virt((phys_addr_t)ddr_health->addr));

	}



	kfree(ddr_health);

	mutex_destroy(&lock);

}

module_exit(ddr_health_exit);