Merge branch 'cxgb4-next'

Hariprasad Shenai says:

====================
Add support to dump cim ibq, obq and qinfo, etc

This patch series adds support to dump cim_ibq, cim_obq, sge_qinfo, pm_stats
and clk debugfs entries.

The patches series is created against 'net-next' tree.
And includes patches on cxgb4 driver.

We have included all the maintainers of respective drivers. Kindly review the
change and let us know in case of any review comments.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -1029,6 +1029,8 @@ int cxgb4_t4_bar2_sge_qregs(struct adapter *adapter,
 		      u64 *pbar2_qoffset,
 		      unsigned int *pbar2_qid);
 
+unsigned int qtimer_val(const struct adapter *adap,
+			const struct sge_rspq *q);
 int t4_init_sge_params(struct adapter *adapter);
 int t4_init_tp_params(struct adapter *adap);
 int t4_filter_field_shift(const struct adapter *adap, int filter_sel);
@@ -1052,6 +1054,12 @@ int t4_mc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
 	       u64 *parity);
 int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data,
 		u64 *parity);
+void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
+void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[]);
+int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data,
+		    size_t n);
+int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data,
+		    size_t n);
 int t4_cim_read(struct adapter *adap, unsigned int addr, unsigned int n,
 		unsigned int *valp);
 int t4_cim_write(struct adapter *adap, unsigned int addr, unsigned int n,

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c

@@ -2500,7 +2500,7 @@ static int closest_thres(const struct sge *s, int thres)
 /*
  * Return a queue's interrupt hold-off time in us.  0 means no timer.
  */
-static unsigned int qtimer_val(const struct adapter *adap,
+unsigned int qtimer_val(const struct adapter *adap,
 			const struct sge_rspq *q)
 {
 	unsigned int idx = q->intr_params >> 1;

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

@@ -2511,6 +2511,60 @@ void t4_load_mtus(struct adapter *adap, const unsigned short *mtus,
 	}
 }
 
+/**
+ *	t4_pmtx_get_stats - returns the HW stats from PMTX
+ *	@adap: the adapter
+ *	@cnt: where to store the count statistics
+ *	@cycles: where to store the cycle statistics
+ *
+ *	Returns performance statistics from PMTX.
+ */
+void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
+{
+	int i;
+	u32 data[2];
+
+	for (i = 0; i < PM_NSTATS; i++) {
+		t4_write_reg(adap, PM_TX_STAT_CONFIG_A, i + 1);
+		cnt[i] = t4_read_reg(adap, PM_TX_STAT_COUNT_A);
+		if (is_t4(adap->params.chip)) {
+			cycles[i] = t4_read_reg64(adap, PM_TX_STAT_LSB_A);
+		} else {
+			t4_read_indirect(adap, PM_TX_DBG_CTRL_A,
+					 PM_TX_DBG_DATA_A, data, 2,
+					 PM_TX_DBG_STAT_MSB_A);
+			cycles[i] = (((u64)data[0] << 32) | data[1]);
+		}
+	}
+}
+
+/**
+ *	t4_pmrx_get_stats - returns the HW stats from PMRX
+ *	@adap: the adapter
+ *	@cnt: where to store the count statistics
+ *	@cycles: where to store the cycle statistics
+ *
+ *	Returns performance statistics from PMRX.
+ */
+void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
+{
+	int i;
+	u32 data[2];
+
+	for (i = 0; i < PM_NSTATS; i++) {
+		t4_write_reg(adap, PM_RX_STAT_CONFIG_A, i + 1);
+		cnt[i] = t4_read_reg(adap, PM_RX_STAT_COUNT_A);
+		if (is_t4(adap->params.chip)) {
+			cycles[i] = t4_read_reg64(adap, PM_RX_STAT_LSB_A);
+		} else {
+			t4_read_indirect(adap, PM_RX_DBG_CTRL_A,
+					 PM_RX_DBG_DATA_A, data, 2,
+					 PM_RX_DBG_STAT_MSB_A);
+			cycles[i] = (((u64)data[0] << 32) | data[1]);
+		}
+	}
+}
+
 /**
  *	get_mps_bg_map - return the buffer groups associated with a port
  *	@adap: the adapter
@@ -4525,6 +4579,91 @@ void t4_read_cimq_cfg(struct adapter *adap, u16 *base, u16 *size, u16 *thres)
 	}
 }
 
+/**
+ *	t4_read_cim_ibq - read the contents of a CIM inbound queue
+ *	@adap: the adapter
+ *	@qid: the queue index
+ *	@data: where to store the queue contents
+ *	@n: capacity of @data in 32-bit words
+ *
+ *	Reads the contents of the selected CIM queue starting at address 0 up
+ *	to the capacity of @data.  @n must be a multiple of 4.  Returns < 0 on
+ *	error and the number of 32-bit words actually read on success.
+ */
+int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
+{
+	int i, err, attempts;
+	unsigned int addr;
+	const unsigned int nwords = CIM_IBQ_SIZE * 4;
+
+	if (qid > 5 || (n & 3))
+		return -EINVAL;
+
+	addr = qid * nwords;
+	if (n > nwords)
+		n = nwords;
+
+	/* It might take 3-10ms before the IBQ debug read access is allowed.
+	 * Wait for 1 Sec with a delay of 1 usec.
+	 */
+	attempts = 1000000;
+
+	for (i = 0; i < n; i++, addr++) {
+		t4_write_reg(adap, CIM_IBQ_DBG_CFG_A, IBQDBGADDR_V(addr) |
+			     IBQDBGEN_F);
+		err = t4_wait_op_done(adap, CIM_IBQ_DBG_CFG_A, IBQDBGBUSY_F, 0,
+				      attempts, 1);
+		if (err)
+			return err;
+		*data++ = t4_read_reg(adap, CIM_IBQ_DBG_DATA_A);
+	}
+	t4_write_reg(adap, CIM_IBQ_DBG_CFG_A, 0);
+	return i;
+}
+
+/**
+ *	t4_read_cim_obq - read the contents of a CIM outbound queue
+ *	@adap: the adapter
+ *	@qid: the queue index
+ *	@data: where to store the queue contents
+ *	@n: capacity of @data in 32-bit words
+ *
+ *	Reads the contents of the selected CIM queue starting at address 0 up
+ *	to the capacity of @data.  @n must be a multiple of 4.  Returns < 0 on
+ *	error and the number of 32-bit words actually read on success.
+ */
+int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
+{
+	int i, err;
+	unsigned int addr, v, nwords;
+	int cim_num_obq = is_t4(adap->params.chip) ?
+				CIM_NUM_OBQ : CIM_NUM_OBQ_T5;
+
+	if ((qid > (cim_num_obq - 1)) || (n & 3))
+		return -EINVAL;
+
+	t4_write_reg(adap, CIM_QUEUE_CONFIG_REF_A, OBQSELECT_F |
+		     QUENUMSELECT_V(qid));
+	v = t4_read_reg(adap, CIM_QUEUE_CONFIG_CTRL_A);
+
+	addr = CIMQBASE_G(v) * 64;    /* muliple of 256 -> muliple of 4 */
+	nwords = CIMQSIZE_G(v) * 64;  /* same */
+	if (n > nwords)
+		n = nwords;
+
+	for (i = 0; i < n; i++, addr++) {
+		t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, OBQDBGADDR_V(addr) |
+			     OBQDBGEN_F);
+		err = t4_wait_op_done(adap, CIM_OBQ_DBG_CFG_A, OBQDBGBUSY_F, 0,
+				      2, 1);
+		if (err)
+			return err;
+		*data++ = t4_read_reg(adap, CIM_OBQ_DBG_DATA_A);
+	}
+	t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, 0);
+	return i;
+}
+
 /**
  *	t4_cim_read - read a block from CIM internal address space
  *	@adap: the adapter

drivers/net/ethernet/chelsio/cxgb4/t4_hw.h

@@ -48,6 +48,7 @@ enum {
 	NMTUS          = 16,    /* size of MTU table */
 	NCCTRL_WIN     = 32,    /* # of congestion control windows */
 	L2T_SIZE       = 4096,  /* # of L2T entries */
+	PM_NSTATS      = 5,     /* # of PM stats */
 	MBOX_LEN       = 64,    /* mailbox size in bytes */
 	TRACE_LEN      = 112,   /* length of trace data and mask */
 	FILTER_OPT_LEN = 36,    /* filter tuple width for optional components */
@@ -60,6 +61,8 @@ enum {
 	CIM_NUM_OBQ    = 6,     /* # of CIM OBQs */
 	CIM_NUM_OBQ_T5 = 8,     /* # of CIM OBQs for T5 adapter */
 	CIMLA_SIZE     = 2048,  /* # of 32-bit words in CIM LA */
+	CIM_IBQ_SIZE   = 128,   /* # of 128-bit words in a CIM IBQ */
+	CIM_OBQ_SIZE   = 128,   /* # of 128-bit words in a CIM OBQ */
 };
 
 enum {

drivers/net/ethernet/chelsio/cxgb4/t4_regs.h

@@ -1203,12 +1203,35 @@
 #define TIMERRESOLUTION_M    0xffU
 #define TIMERRESOLUTION_G(x) (((x) >> TIMERRESOLUTION_S) & TIMERRESOLUTION_M)
 
+#define TIMESTAMPRESOLUTION_S    8
+#define TIMESTAMPRESOLUTION_M    0xffU
+#define TIMESTAMPRESOLUTION_G(x) \
+	(((x) >> TIMESTAMPRESOLUTION_S) & TIMESTAMPRESOLUTION_M)
+
 #define DELAYEDACKRESOLUTION_S    0
 #define DELAYEDACKRESOLUTION_M    0xffU
 #define DELAYEDACKRESOLUTION_G(x) \
 	(((x) >> DELAYEDACKRESOLUTION_S) & DELAYEDACKRESOLUTION_M)
 
 #define TP_SHIFT_CNT_A 0x7dc0
+#define TP_RXT_MIN_A 0x7d98
+#define TP_RXT_MAX_A 0x7d9c
+#define TP_PERS_MIN_A 0x7da0
+#define TP_PERS_MAX_A 0x7da4
+#define TP_KEEP_IDLE_A 0x7da8
+#define TP_KEEP_INTVL_A 0x7dac
+#define TP_INIT_SRTT_A 0x7db0
+#define TP_DACK_TIMER_A 0x7db4
+#define TP_FINWAIT2_TIMER_A 0x7db8
+
+#define INITSRTT_S    0
+#define INITSRTT_M    0xffffU
+#define INITSRTT_G(x) (((x) >> INITSRTT_S) & INITSRTT_M)
+
+#define PERSMAX_S    0
+#define PERSMAX_M    0x3fffffffU
+#define PERSMAX_V(x) ((x) << PERSMAX_S)
+#define PERSMAX_G(x) (((x) >> PERSMAX_S) & PERSMAX_M)
 
 #define SYNSHIFTMAX_S    24
 #define SYNSHIFTMAX_M    0xffU
@@ -1380,6 +1403,12 @@
 #define PBL_BOUND_ERR_CH0_F    PBL_BOUND_ERR_CH0_V(1U)
 
 #define PM_RX_INT_CAUSE_A	0x8fdc
+#define PM_RX_STAT_CONFIG_A 0x8fc8
+#define PM_RX_STAT_COUNT_A 0x8fcc
+#define PM_RX_STAT_LSB_A 0x8fd0
+#define PM_RX_DBG_CTRL_A 0x8fd0
+#define PM_RX_DBG_DATA_A 0x8fd4
+#define PM_RX_DBG_STAT_MSB_A 0x10013
 
 #define PMRX_FRAMING_ERROR_F	0x003ffff0U
 
@@ -1404,6 +1433,12 @@
 #define PMRX_E_PCMD_PAR_ERROR_F    PMRX_E_PCMD_PAR_ERROR_V(1U)
 
 #define PM_TX_INT_CAUSE_A	0x8ffc
+#define PM_TX_STAT_CONFIG_A 0x8fe8
+#define PM_TX_STAT_COUNT_A 0x8fec
+#define PM_TX_STAT_LSB_A 0x8ff0
+#define PM_TX_DBG_CTRL_A 0x8ff0
+#define PM_TX_DBG_DATA_A 0x8ff4
+#define PM_TX_DBG_STAT_MSB_A 0x1001a
 
 #define PCMD_LEN_OVFL0_S    31
 #define PCMD_LEN_OVFL0_V(x) ((x) << PCMD_LEN_OVFL0_S)
@@ -2538,6 +2573,39 @@
 #define HOSTWRITE_V(x)	((x) << HOSTWRITE_S)
 #define HOSTWRITE_F	HOSTWRITE_V(1U)
 
+#define CIM_IBQ_DBG_CFG_A 0x7b60
+
+#define IBQDBGADDR_S    16
+#define IBQDBGADDR_M    0xfffU
+#define IBQDBGADDR_V(x) ((x) << IBQDBGADDR_S)
+#define IBQDBGADDR_G(x) (((x) >> IBQDBGADDR_S) & IBQDBGADDR_M)
+
+#define IBQDBGBUSY_S    1
+#define IBQDBGBUSY_V(x) ((x) << IBQDBGBUSY_S)
+#define IBQDBGBUSY_F    IBQDBGBUSY_V(1U)
+
+#define IBQDBGEN_S    0
+#define IBQDBGEN_V(x) ((x) << IBQDBGEN_S)
+#define IBQDBGEN_F    IBQDBGEN_V(1U)
+
+#define CIM_OBQ_DBG_CFG_A 0x7b64
+
+#define OBQDBGADDR_S    16
+#define OBQDBGADDR_M    0xfffU
+#define OBQDBGADDR_V(x) ((x) << OBQDBGADDR_S)
+#define OBQDBGADDR_G(x) (((x) >> OBQDBGADDR_S) & OBQDBGADDR_M)
+
+#define OBQDBGBUSY_S    1
+#define OBQDBGBUSY_V(x) ((x) << OBQDBGBUSY_S)
+#define OBQDBGBUSY_F    OBQDBGBUSY_V(1U)
+
+#define OBQDBGEN_S    0
+#define OBQDBGEN_V(x) ((x) << OBQDBGEN_S)
+#define OBQDBGEN_F    OBQDBGEN_V(1U)
+
+#define CIM_IBQ_DBG_DATA_A 0x7b68
+#define CIM_OBQ_DBG_DATA_A 0x7b6c
+
 #define UPDBGLARDEN_S		1
 #define UPDBGLARDEN_V(x)	((x) << UPDBGLARDEN_S)
 #define UPDBGLARDEN_F		UPDBGLARDEN_V(1U)