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Commit c63c2859 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "msm: pcie: add sysfs entry to output PCIe link ASPM stats"

parents d7006445 1d5224ec

drivers/pci/controller/pci-msm.c

+41 −0
Original line number Diff line number Diff line
@@ -83,6 +83,11 @@ 
#define PCIE20_LINK_DOWN_AXI_ECAM_BLOCK_STATUS (0x630)

#define PCIE20_PARF_STATUS (0x230)



#define PCIE20_PARF_DEBUG_CNT_IN_L0S (0xc10)

#define PCIE20_PARF_DEBUG_CNT_IN_L1 (0xc0c)

#define PCIE20_PARF_DEBUG_CNT_IN_L1SUB_L1 (0xc84)

#define PCIE20_PARF_DEBUG_CNT_IN_L1SUB_L2 (0xc88)



#define PCIE20_PARF_CLKREQ_OVERRIDE (0x2b0)

#define PCIE20_PARF_CLKREQ_IN_VALUE (BIT(3))

#define PCIE20_PARF_CLKREQ_IN_ENABLE (BIT(1))
@@ -332,6 +337,7 @@ enum msm_pcie_res { 
	MSM_PCIE_RES_ELBI,

	MSM_PCIE_RES_IATU,

	MSM_PCIE_RES_CONF,

	MSM_PCIE_RES_MHI,

	MSM_PCIE_RES_TCSR,

	MSM_PCIE_RES_RUMI,

	MSM_PCIE_MAX_RES,
@@ -710,6 +716,7 @@ struct msm_pcie_dev_t { 
	void __iomem *iatu;

	void __iomem *dm_core;

	void __iomem *conf;

	void __iomem *mhi;

	void __iomem *tcsr;

	void __iomem *rumi;
@@ -1063,6 +1070,7 @@ static const struct msm_pcie_res_info_t msm_pcie_res_info[MSM_PCIE_MAX_RES] = { 
	{"elbi", NULL, NULL},

	{"iatu", NULL, NULL},

	{"conf", NULL, NULL},

	{"mhi", NULL, NULL},

	{"tcsr", NULL, NULL},

	{"rumi", NULL, NULL}

};
@@ -2133,6 +2141,36 @@ static ssize_t enumerate_store(struct device *dev, 
}

static DEVICE_ATTR_WO(enumerate);



static ssize_t aspm_stat_show(struct device *dev,

				struct device_attribute *attr,

				char *buf)

{

	struct msm_pcie_dev_t *pcie_dev = dev_get_drvdata(dev);



	if (!pcie_dev->mhi)

		return scnprintf(buf, PAGE_SIZE,

				 "PCIe: RC%d: No dev or MHI space found\n",

				 pcie_dev->rc_idx);



	if (pcie_dev->link_status != MSM_PCIE_LINK_ENABLED)

		return scnprintf(buf, PAGE_SIZE,

				 "PCIe: RC%d: registers are not accessible\n",

				 pcie_dev->rc_idx);



	return scnprintf(buf, PAGE_SIZE,

			 "PCIe: RC%d: L0s: %u L1: %u L1.1: %u L1.2: %u\n",

			 pcie_dev->rc_idx,

			 readl_relaxed(pcie_dev->mhi +

				       PCIE20_PARF_DEBUG_CNT_IN_L0S),

			 readl_relaxed(pcie_dev->mhi +

				       PCIE20_PARF_DEBUG_CNT_IN_L1),

			 readl_relaxed(pcie_dev->mhi +

				       PCIE20_PARF_DEBUG_CNT_IN_L1SUB_L1),

			 readl_relaxed(pcie_dev->mhi +

				       PCIE20_PARF_DEBUG_CNT_IN_L1SUB_L2));

}

static DEVICE_ATTR_RO(aspm_stat);



static ssize_t l23_rdy_poll_timeout_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)
@@ -2167,6 +2205,7 @@ static DEVICE_ATTR_RW(l23_rdy_poll_timeout); 
static struct attribute *msm_pcie_debug_attrs[] = {

	&dev_attr_link_check_max_count.attr,

	&dev_attr_enumerate.attr,

	&dev_attr_aspm_stat.attr,

	&dev_attr_l23_rdy_poll_timeout.attr,

	NULL,

};
@@ -4066,6 +4105,7 @@ static int msm_pcie_get_reg(struct msm_pcie_dev_t *pcie_dev) 
	pcie_dev->iatu = pcie_dev->res[MSM_PCIE_RES_IATU].base;

	pcie_dev->dm_core = pcie_dev->res[MSM_PCIE_RES_DM_CORE].base;

	pcie_dev->conf = pcie_dev->res[MSM_PCIE_RES_CONF].base;

	pcie_dev->mhi = pcie_dev->res[MSM_PCIE_RES_MHI].base;

	pcie_dev->tcsr = pcie_dev->res[MSM_PCIE_RES_TCSR].base;

	pcie_dev->rumi = pcie_dev->res[MSM_PCIE_RES_RUMI].base;
@@ -4182,6 +4222,7 @@ static void msm_pcie_release_resources(struct msm_pcie_dev_t *dev) 
	dev->iatu = NULL;

	dev->dm_core = NULL;

	dev->conf = NULL;

	dev->mhi = NULL;

	dev->tcsr = NULL;

	dev->rumi = NULL;

}