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Commit 91703cf8 authored by Chandana Kishori Chiluveru's avatar Chandana Kishori Chiluveru Committed by Gerrit - the friendly Code Review server
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serial: msm_geni_serial: Add new UART IPC log file in DMA mode 



This patch adds new IPC log file to dump IRQ registers to know
the interrupt status in dma mode. This will help in debugging
interrupt storm issues in dma mode.

Also increase the IPC log buffer size.

Change-Id: I33a32e8d237769808a9c7553c9c3e6d1024d9f50
Signed-off-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
parent 660cc575

drivers/tty/serial/msm_geni_serial.c

+20 −4
Original line number Diff line number Diff line
@@ -114,9 +114,9 @@ 
#define WAIT_XFER_MAX_ITER	(2)

#define WAIT_XFER_MAX_TIMEOUT_US	(10000)

#define WAIT_XFER_MIN_TIMEOUT_US	(9000)

#define IPC_LOG_PWR_PAGES	(6)

#define IPC_LOG_MISC_PAGES	(10)

#define IPC_LOG_TX_RX_PAGES	(10)

#define IPC_LOG_PWR_PAGES	(10)

#define IPC_LOG_MISC_PAGES	(30)

#define IPC_LOG_TX_RX_PAGES	(30)

#define DATA_BYTES_PER_LINE	(32)



#define M_IRQ_BITS		(M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN |\
@@ -189,6 +189,7 @@ struct msm_geni_serial_port { 
	void *ipc_log_misc;

	void *console_log;

	void *ipc_log_single;

	void *ipc_log_irqstatus;

	unsigned int cur_baud;

	int ioctl_count;

	int edge_count;
@@ -1944,6 +1945,12 @@ static void msm_geni_serial_handle_isr(struct uart_port *uport, 
		dma_rx_status = geni_read_reg_nolog(uport->membase,

							SE_DMA_RX_IRQ_STAT);



		if (m_irq_status || s_irq_status ||

				dma_tx_status || dma_rx_status)

			IPC_LOG_MSG(msm_port->ipc_log_irqstatus,

				    "%s: sirq:0x%x mirq:0x%x dma_txirq:0x%x dma_rxirq:0x%x\n",

				    __func__, s_irq_status, m_irq_status,

				    dma_tx_status, dma_rx_status);

		if (dma_tx_status) {



			geni_write_reg_nolog(dma_tx_status, uport->membase,
@@ -2895,7 +2902,7 @@ static void console_unregister(struct uart_driver *drv) 
static void msm_geni_serial_debug_init(struct uart_port *uport, bool console)

{

	struct msm_geni_serial_port *msm_port = GET_DEV_PORT(uport);

	char name[30];

	char name[35];



	msm_port->dbg = debugfs_create_dir(dev_name(uport->dev), NULL);

	if (IS_ERR_OR_NULL(msm_port->dbg))
@@ -2948,6 +2955,15 @@ static void msm_geni_serial_debug_init(struct uart_port *uport, bool console) 
			if (!msm_port->ipc_log_single)

				dev_info(uport->dev, "Err in single IPC Log\n");

		}

		memset(name, 0, sizeof(name));

		if (!msm_port->ipc_log_irqstatus) {

			scnprintf(name, sizeof(name), "%s%s",

					dev_name(uport->dev), "_irqstatus");

			msm_port->ipc_log_irqstatus = ipc_log_context_create(

					IPC_LOG_MISC_PAGES, name, 0);

			if (!msm_port->ipc_log_irqstatus)

				dev_info(uport->dev, "Err in irqstatus IPC Log\n");

		}

	} else {

		memset(name, 0, sizeof(name));

		if (!msm_port->console_log) {