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Commit c998d07a authored by Vivek Pernamitta's avatar Vivek Pernamitta
Browse files

msm: pcie: Dump PCIe registers for hang event 



Dump limited set of pcie PARF, DBI and PHY registers for
hang event.

Change-Id: Ie9d2a144a9af481f1f178ffad6850c55f02924e7
Signed-off-by: default avatarVivek Pernamitta <vpernami@codeaurora.org>
parent 38055361

drivers/pci/controller/pci-msm.c

+240 −0
Original line number Diff line number Diff line
@@ -66,6 +66,13 @@ 
#define PCIE20_PARF_BDF_TO_SID_TABLE_N (0x2000)

#define PCIE20_PARF_L1SUB_AHB_CLK_MAX_TIMER (0x180)

#define PCIE20_PARF_DEBUG_INT_EN (0x190)

#define PCIE20_PARF_PM_STTS_1 (0x28)

#define PCIE20_PARF_INT_ALL_2_STATUS (0x500)

#define PCIE20_PARF_L1SS_SLEEP_MODE_HANDLER_STATUS (0x4D0)

#define PCIE20_PARF_L1SS_SLEEP_MODE_HANDLER_CFG (0x4D4)

#define PCIE20_PARF_CORE_ERRORS (0x3C0)

#define PCIE20_LINK_DOWN_AXI_ECAM_BLOCK_STATUS (0x630)

#define PCIE20_PARF_STATUS (0x230)



#define PCIE20_PARF_CLKREQ_OVERRIDE (0x2b0)

#define PCIE20_PARF_CLKREQ_IN_VALUE (BIT(3))
@@ -124,6 +131,12 @@ 
#define PCIE20_AER_ROOT_ERR_STATUS_REG (0x130)

#define PCIE20_AER_ERR_SRC_ID_REG (0x134)



#define PCIE20_L1SUB_CONTROL1_REG (0x204)

#define PCIE20_TX_P_FC_CREDIT_STATUS_OFF (0x730)

#define PCIE20_TX_NP_FC_CREDIT_STATUS_OFF (0x734)

#define PCIE20_TX_CPL_FC_CREDIT_STATUS_OFF (0x738)

#define PCIE20_QUEUE_STATUS_OFF (0x73C)



#define RD (0)

#define WR (1)

#define MSM_PCIE_ERROR (-1)
@@ -182,6 +195,52 @@ 
#define MSM_PCIE_MAX_RESET (5)

#define MSM_PCIE_MAX_PIPE_RESET (1)



/* PCIE PHY status registers offset */

#define QSERDES_COM_SYSCLK_DET_COMP_STATUS (0x68)

#define GEN3X1_QSERDES_COM_CMN_STATUS (0x140)

#define QSERDES_COM_RESET_SM_STATUS (0x144)

#define QSERDES_COM_RESTRIM_CODE_STATUS (0x148)

#define QSERDES_COM_PLLCAL_CODE1_STATUS (0x14C)

#define QSERDES_COM_PLLCAL_CODE2_STATUS (0x150)

#define QSERDES_COM_INTEGLOOP_BINCODE_STATUS (0x160)

#define QSERDES_COM_C_READY_STATUS (0x178)

#define QSERDES_TX_BIST_STATUS (0x2F0)

#define QSERDES_TX_ALOG_OBSV_BUS_STATUS_1 (0x2FC)

#define QSERDES_TX_IDAC_STATUS_I (0x348)

#define QSERDES_TX_IDAC_STATUS_IBAR (0x34C)

#define QSERDES_TX_IDAC_STATUS_Q (0x350)

#define QSERDES_TX_IDAC_STATUS_QBAR (0x354)

#define QSERDES_TX_IDAC_STATUS_A (0x358)

#define QSERDES_TX_IDAC_STATUS_ABAR (0x35C)

#define QSERDES_TX_IDAC_STATUS_SM_ON (0x360)

#define QSERDES_TX_IDAC_STATUS_CAL_DONE (0x364)

#define QSERDES_TX_IDAC_STATUS_SIGNERROR (0x368)

#define QSERDES_TX_DCC_CAL_STATUS (0x36C)

#define QSERDES_RX_ALOG_OBSV_BUS_STATUS_1 (0x5FC)

#define PCIE_USB3_UNI_PCS_LN_PCS_STATUS1 (0x600)

#define PCIE_USB3_UNI_PCS_LN_PCS_STATUS2 (0x604)

#define PCIE_USB3_UNI_PCS_LN_PCS_STATUS2_CLEAR (0x608)

#define PCIE_USB3_UNI_PCS_LN_PCS_STATUS3 (0x60C)

#define PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_L_STATUS (0x610)

#define PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_H_STATUS (0x614)

#define PCIE_USB3_UNI_PCS_LN_BIST_CHK_STATUS (0x618)

#define PCIE_USB3_UNI_PCS_PCIE_LN_PCIE_PCS_STATUS (0x720)

#define PCIE_USB3_UNI_PCS_PCS_STATUS (0x814)

#define PCIE_USB3_UNI_PCS_PCS_STATUS2 (0x818)

#define PCIE_USB3_UNI_PCS_PCS_STATUS3 (0x81C)

#define PCIE_USB3_UNI_PCS_PCS_STATUS4 (0x820)

#define PCIE_USB3_UNI_PCS_PCS_STATUS5 (0x824)

#define PCIE_USB3_UNI_PCS_PCS_STATUS6 (0x828)

#define PCIE_USB3_UNI_PCS_PCS_STATUS7 (0x82C)

#define PCIE_USB3_UNI_PCS_DEBUG_BUS_0_STATUS (0x830)

#define PCIE_USB3_UNI_PCS_DEBUG_BUS_1_STATUS (0x834)

#define PCIE_USB3_UNI_PCS_DEBUG_BUS_2_STATUS (0x838)

#define PCIE_USB3_UNI_PCS_DEBUG_BUS_3_STATUS (0x83C)

#define PCIE_USB3_UNI_PCS_PCIE_INT_AUX_CLK_STATUS (0xC00)

#define PCIE_USB3_UNI_PCS_PCIE_OSC_DTCT_STATUS (0xC04)

#define PCIE_USB3_UNI_PCS_USB3_AUTONOMOUS_MODE_STATUS (0xe04)

#define PCIE_USB3_UNI_PCS_USB3_LFPS_RXTERM_IRQ_SOURCE_STATUS (0xe10)



/* Each tick is 19.2 MHz */

#define L1SS_TIMEOUT_US_TO_TICKS(x) (x * 192 / 10)

#define L1SS_TIMEOUT_US (100000)
@@ -994,6 +1053,110 @@ static const struct msm_pcie_irq_info_t msm_pcie_irq_info[MSM_PCIE_MAX_IRQ] = { 
	{"int_global_int", 0}

};



#define MSM_PCIE_PARF_REG_DUMP (11)

#define MSM_PCIE_DBI_REG_DUMP (8)

#define MSM_PCIE_PHY_REG_DUMP (44)



struct msm_pcie_reg_dump_t {

	char *name;

	u32 offset;

};



static struct msm_pcie_reg_dump_t parf_reg_dump[MSM_PCIE_PARF_REG_DUMP + 1] = {

	{"PARF_LTSSM", PCIE20_PARF_LTSSM},

	{"PARF_PM_STTS", PCIE20_PARF_PM_STTS},

	{"PARF_PM_STTS_1", PCIE20_PARF_PM_STTS_1},

	{"PCIE_INT_ALL_STATUS", PCIE20_PARF_INT_ALL_STATUS},

	{"PCIE_INT_ALL_2_STATUS", PCIE20_PARF_INT_ALL_2_STATUS},

	{"L1SS_SLEEP_MODE_HANDLER_STATUS",

		 PCIE20_PARF_L1SS_SLEEP_MODE_HANDLER_STATUS},

	{"L1SS_SLEEP_MODE_HANDLER_CFG",

		 PCIE20_PARF_L1SS_SLEEP_MODE_HANDLER_CFG},

	{"PCIE_PARF_CORE_ERRORS", PCIE20_PARF_CORE_ERRORS},

	{"LINK_DOWN_AXI_ECAM_BLOCK_STATUS",

		PCIE20_LINK_DOWN_AXI_ECAM_BLOCK_STATUS},

	{"PCIE_STATUS", PCIE20_PARF_STATUS},

	{"PARF_SYS_CTRL", PCIE20_PARF_SYS_CTRL},

	{NULL, 0}

};



static struct msm_pcie_reg_dump_t dbi_reg_dump[MSM_PCIE_DBI_REG_DUMP + 1] = {

	{"UNCORR_ERR_STATUS_OFF", PCIE20_AER_UNCORR_ERR_STATUS_REG},

	{"CORR_ERR_STATUS_OFF", PCIE20_AER_CORR_ERR_STATUS_REG},

	{"LINK_CONTROL_LINK_STATUS_REG", PCIE20_CAP_LINKCTRLSTATUS},

	{"L1SUB_CONTROL1_REG", PCIE20_L1SUB_CONTROL1_REG},

	{"TX_P_FC_CREDIT_STATUS_OFF", PCIE20_TX_P_FC_CREDIT_STATUS_OFF},

	{"TX_NP_FC_CREDIT_STATUS_OFF", PCIE20_TX_NP_FC_CREDIT_STATUS_OFF},

	{"TX_CPL_FC_CREDIT_STATUS_OFF", PCIE20_TX_CPL_FC_CREDIT_STATUS_OFF},

	{"QUEUE_STATUS_OFF", PCIE20_QUEUE_STATUS_OFF},

	{NULL, 0}

};



static struct msm_pcie_reg_dump_t phy_reg_dump[MSM_PCIE_PHY_REG_DUMP + 1] = {

	{"QSERDES_COM_SYSCLK_DET_COMP_STATUS",

		QSERDES_COM_SYSCLK_DET_COMP_STATUS},

	{"GEN3X1_QSERDES_COM_CMN_STATUS", GEN3X1_QSERDES_COM_CMN_STATUS},

	{"QSERDES_COM_RESET_SM_STATUS", QSERDES_COM_RESET_SM_STATUS},

	{"QSERDES_COM_RESTRIM_CODE_STATUS", QSERDES_COM_RESTRIM_CODE_STATUS},

	{"QSERDES_COM_PLLCAL_CODE1_STATUS", QSERDES_COM_PLLCAL_CODE1_STATUS},

	{"QSERDES_COM_PLLCAL_CODE2_STATUS", QSERDES_COM_PLLCAL_CODE2_STATUS},

	{"QSERDES_COM_INTEGLOOP_BINCODE_STATUS",

		QSERDES_COM_INTEGLOOP_BINCODE_STATUS},

	{"QSERDES_COM_C_READY_STATUS", QSERDES_COM_C_READY_STATUS},

	{"QSERDES_TX_BIST_STATUS", QSERDES_TX_BIST_STATUS},

	{"QSERDES_TX_ALOG_OBSV_BUS_STATUS_1",

		QSERDES_TX_ALOG_OBSV_BUS_STATUS_1},

	{"QSERDES_TX_IDAC_STATUS_I", QSERDES_TX_IDAC_STATUS_I},

	{"QSERDES_TX_IDAC_STATUS_IBAR", QSERDES_TX_IDAC_STATUS_IBAR},

	{"QSERDES_TX_IDAC_STATUS_Q", QSERDES_TX_IDAC_STATUS_Q},

	{"QSERDES_TX_IDAC_STATUS_QBAR", QSERDES_TX_IDAC_STATUS_QBAR},

	{"QSERDES_TX_IDAC_STATUS_A", QSERDES_TX_IDAC_STATUS_A},

	{"QSERDES_TX_IDAC_STATUS_ABAR", QSERDES_TX_IDAC_STATUS_ABAR},

	{"QSERDES_TX_IDAC_STATUS_SM_ON", QSERDES_TX_IDAC_STATUS_SM_ON},

	{"QSERDES_TX_IDAC_STATUS_CAL_DONE", QSERDES_TX_IDAC_STATUS_CAL_DONE},

	{"QSERDES_TX_IDAC_STATUS_SIGNERROR", QSERDES_TX_IDAC_STATUS_SIGNERROR},

	{"QSERDES_TX_DCC_CAL_STATUS", QSERDES_TX_DCC_CAL_STATUS},

	{"QSERDES_RX_ALOG_OBSV_BUS_STATUS_1",

		QSERDES_RX_ALOG_OBSV_BUS_STATUS_1},

	{"PCIE_USB3_UNI_PCS_LN_PCS_STATUS1", PCIE_USB3_UNI_PCS_LN_PCS_STATUS1},

	{"PCIE_USB3_UNI_PCS_LN_PCS_STATUS2", PCIE_USB3_UNI_PCS_LN_PCS_STATUS2},

	{"PCIE_USB3_UNI_PCS_LN_PCS_STATUS2_CLEAR",

		PCIE_USB3_UNI_PCS_LN_PCS_STATUS2_CLEAR},

	{"PCIE_USB3_UNI_PCS_LN_PCS_STATUS3", PCIE_USB3_UNI_PCS_LN_PCS_STATUS3},

	{"PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_L_STATUS",

		PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_L_STATUS},

	{"PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_H_STATUS",

		PCIE_USB3_UNI_PCS_LN_BIST_CHK_ERR_CNT_H_STATUS},

	{"PCIE_USB3_UNI_PCS_LN_BIST_CHK_STATUS",

		PCIE_USB3_UNI_PCS_LN_BIST_CHK_STATUS},

	{"PCIE_USB3_UNI_PCS_PCIE_LN_PCIE_PCS_STATUS",

		PCIE_USB3_UNI_PCS_PCIE_LN_PCIE_PCS_STATUS},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS", PCIE_USB3_UNI_PCS_PCS_STATUS},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS2", PCIE_USB3_UNI_PCS_PCS_STATUS2},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS3", PCIE_USB3_UNI_PCS_PCS_STATUS3},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS4", PCIE_USB3_UNI_PCS_PCS_STATUS4},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS5", PCIE_USB3_UNI_PCS_PCS_STATUS5},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS6", PCIE_USB3_UNI_PCS_PCS_STATUS6},

	{"PCIE_USB3_UNI_PCS_PCS_STATUS7", PCIE_USB3_UNI_PCS_PCS_STATUS7},

	{"PCIE_USB3_UNI_PCS_DEBUG_BUS_0_STATUS",

		PCIE_USB3_UNI_PCS_DEBUG_BUS_0_STATUS},

	{"PCIE_USB3_UNI_PCS_DEBUG_BUS_1_STATUS",

		PCIE_USB3_UNI_PCS_DEBUG_BUS_1_STATUS},

	{"PCIE_USB3_UNI_PCS_DEBUG_BUS_2_STATUS",

		PCIE_USB3_UNI_PCS_DEBUG_BUS_2_STATUS},

	{"PCIE_USB3_UNI_PCS_DEBUG_BUS_3_STATUS",

		PCIE_USB3_UNI_PCS_DEBUG_BUS_3_STATUS},

	{"PCIE_USB3_UNI_PCS_PCIE_INT_AUX_CLK_STATUS",

		PCIE_USB3_UNI_PCS_PCIE_INT_AUX_CLK_STATUS},

	{"PCIE_USB3_UNI_PCS_PCIE_OSC_DTCT_STATUS",

		PCIE_USB3_UNI_PCS_PCIE_OSC_DTCT_STATUS},

	{"PCIE_USB3_UNI_PCS_USB3_AUTONOMOUS_MODE_STATUS",

		PCIE_USB3_UNI_PCS_USB3_AUTONOMOUS_MODE_STATUS},

	{"PCIE_USB3_UNI_PCS_USB3_LFPS_RXTERM_IRQ_SOURCE_STATUS",

		PCIE_USB3_UNI_PCS_USB3_LFPS_RXTERM_IRQ_SOURCE_STATUS},

	{NULL, 0}

};



static void msm_pcie_config_sid(struct msm_pcie_dev_t *dev);

static void msm_pcie_config_l0s_disable_all(struct msm_pcie_dev_t *dev,

				struct pci_bus *bus);
@@ -1020,6 +1183,83 @@ static inline void msm_pcie_fixup_irqs(struct msm_pcie_dev_t *dev) 
}

#endif



static u32 msm_pcie_reg_copy(struct msm_pcie_dev_t *pcie_dev,

		u8 *buf, u32 size, void __iomem *base,

		struct msm_pcie_reg_dump_t *reg_list,

		u8 reg_len)

{

	u32 ret = 0, val, i;



	PCIE_DUMP(pcie_dev, "RC%d buf=0x%x size=%u, reg_len=%u\n",

		pcie_dev->rc_idx, buf, size, reg_len);



	for (i = 0; (reg_list->name) && (i + reg_len <= size);

	     i += reg_len) {

		val = readl_relaxed(base + reg_list->offset);

		memcpy(buf, &val, reg_len);

		reg_list++;

		buf += reg_len;

		ret += reg_len;

	}

	return ret;

}



int msm_pcie_reg_dump(struct pci_dev *pci_dev, u8 *buff, u32 len)

{

	struct pci_dev *root_pci_dev;

	struct msm_pcie_dev_t *pcie_dev;

	u32 offset = 0;



	if (!pci_dev)

		return -EINVAL;



	root_pci_dev = pci_find_pcie_root_port(pci_dev);

	if (!root_pci_dev)

		return -ENODEV;



	pcie_dev = PCIE_BUS_PRIV_DATA(root_pci_dev->bus);



	if (!pcie_dev) {

		pr_err("PCIe: did not find RC for pci endpoint device.\n");

		return -ENODEV;

	}



	PCIE_DUMP(pcie_dev, "RC%d hang event dump buff=0x%x len=%u\n",

		pcie_dev->rc_idx, buff, len);



	offset = msm_pcie_reg_copy(pcie_dev, buff, len,

			pcie_dev->parf, parf_reg_dump, 4);



	buff += offset;

	len -= offset;



	/* check PHY status before dumping DBI registers */

	if (!(readl_relaxed(pcie_dev->phy + pcie_dev->phy_status_offset) &

	    BIT(pcie_dev->phy_status_bit))) {



		PCIE_DUMP(pcie_dev, "RC%d Dump DBI registers\n",

			pcie_dev->rc_idx);

		offset = msm_pcie_reg_copy(pcie_dev, buff, len,

				pcie_dev->dm_core, dbi_reg_dump, 4);

	} else {

		/* PHY status bit is set to 1 so dump 0's in dbi buffer space */

		PCIE_DUMP(pcie_dev, "RC%d PHY is off, skip DBI\n",

			pcie_dev->rc_idx);

		memset(buff, 0, MSM_PCIE_DBI_REG_DUMP * 4);

		offset = MSM_PCIE_DBI_REG_DUMP * 4;

	}



	buff += offset;

	len -= offset;

	offset = msm_pcie_reg_copy(pcie_dev, buff, len,

			pcie_dev->phy, phy_reg_dump, 1);



	PCIE_DUMP(pcie_dev, "RC%d hang event Exit\n", pcie_dev->rc_idx);



	return 0;

}

EXPORT_SYMBOL(msm_pcie_reg_dump);



static inline void msm_pcie_write_reg(void __iomem *base, u32 offset, u32 value)

{

	writel_relaxed(value, base + offset);

include/linux/msm_pcie.h

+16 −0
Original line number Diff line number Diff line
@@ -217,6 +217,17 @@ int msm_pcie_shadow_control(struct pci_dev *dev, bool enable); 
int msm_pcie_debug_info(struct pci_dev *dev, u32 option, u32 base,

			u32 offset, u32 mask, u32 value);



/*

 * msm_pcie_reg_dump - dump pcie regsters for debug

 * @pci_dev:	pci device structure

 * @buffer:	destination buffer address

 * @len:		length of buffer

 *

 * This functions dumps PCIE registers for debug. Sould be used when

 * link is alredy enabled

 */

int msm_pcie_reg_dump(struct pci_dev *pci_dev, u8 *buff, u32 len);



#else /* !CONFIG_PCI_MSM */

static inline int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr,

			void *user, void *data, u32 options)
@@ -273,6 +284,11 @@ static inline int msm_pcie_debug_info(struct pci_dev *dev, u32 option, u32 base, 
{

	return -ENODEV;

}



static inline int msm_pcie_reg_dump(struct pci_dev *pci_dev, u8 *buff, u32 len)

{

	return -ENODEV;

}

#endif /* CONFIG_PCI_MSM */



#endif /* __MSM_PCIE_H */