IB/ipath: Add new chip-specific functions to older chips, consistent init

This adds the new (sometimes empty) chip-specific functions to the older
chips, and makes the initialization and related functions consistent across
all 3 chips.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 156 insertions, 16 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_iba6110.c b/drivers/infiniband/hw/ipath/ipath_iba6110.c
index ac436c630bc..9e2ced3cdc5 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6110.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6110.c
@@ -329,6 +329,9 @@ static const struct ipath_cregs ipath_ht_cregs = {
 #define INFINIPATH_HWE_HTAPLL_RFSLIP        0x1000000000000000ULL
 #define INFINIPATH_HWE_SERDESPLLFAILED      0x2000000000000000ULL
 
+#define IBA6110_IBCS_LINKTRAININGSTATE_MASK 0xf
+#define IBA6110_IBCS_LINKSTATE_SHIFT 4
+
 /* kr_extstatus bits */
 #define INFINIPATH_EXTS_FREQSEL 0x2
 #define INFINIPATH_EXTS_SERDESSEL 0x4
@@ -705,7 +708,6 @@ static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
 			      "with ID %u\n", boardrev);
 		snprintf(name, namelen, "Unknown_InfiniPath_QHT7xxx_%u",
 			 boardrev);
-		ret = 1;
 		break;
 	}
 	if (n)
@@ -1137,11 +1139,49 @@ static void ipath_setup_ht_setextled(struct ipath_devdata *dd,
 
 static void ipath_init_ht_variables(struct ipath_devdata *dd)
 {
+	/*
+	 * setup the register offsets, since they are different for each
+	 * chip
+	 */
+	dd->ipath_kregs = &ipath_ht_kregs;
+	dd->ipath_cregs = &ipath_ht_cregs;
+
 	dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
 	dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
 	dd->ipath_gpio_sda = IPATH_GPIO_SDA;
 	dd->ipath_gpio_scl = IPATH_GPIO_SCL;
 
+	/*
+	 * Fill in data for field-values that change in newer chips.
+	 * We dynamically specify only the mask for LINKTRAININGSTATE
+	 * and only the shift for LINKSTATE, as they are the only ones
+	 * that change.  Also precalculate the 3 link states of interest
+	 * and the combined mask.
+	 */
+	dd->ibcs_ls_shift = IBA6110_IBCS_LINKSTATE_SHIFT;
+	dd->ibcs_lts_mask = IBA6110_IBCS_LINKTRAININGSTATE_MASK;
+	dd->ibcs_mask = (INFINIPATH_IBCS_LINKSTATE_MASK <<
+		dd->ibcs_ls_shift) | dd->ibcs_lts_mask;
+	dd->ib_init = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
+		INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
+		(INFINIPATH_IBCS_L_STATE_INIT << dd->ibcs_ls_shift);
+	dd->ib_arm = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
+		INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
+		(INFINIPATH_IBCS_L_STATE_ARM << dd->ibcs_ls_shift);
+	dd->ib_active = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
+		INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
+		(INFINIPATH_IBCS_L_STATE_ACTIVE << dd->ibcs_ls_shift);
+
+	/*
+	 * Fill in data for ibcc field-values that change in newer chips.
+	 * We dynamically specify only the mask for LINKINITCMD
+	 * and only the shift for LINKCMD and MAXPKTLEN, as they are
+	 * the only ones that change.
+	 */
+	dd->ibcc_lic_mask = INFINIPATH_IBCC_LINKINITCMD_MASK;
+	dd->ibcc_lc_shift = INFINIPATH_IBCC_LINKCMD_SHIFT;
+	dd->ibcc_mpl_shift = INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
+
 	/* Fill in shifts for RcvCtrl. */
 	dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
 	dd->ipath_r_intravail_shift = INFINIPATH_R_INTRAVAIL_SHIFT;
@@ -1204,6 +1244,8 @@ static void ipath_init_ht_variables(struct ipath_devdata *dd)
 
 	dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
 	dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
+	dd->ipath_i_rcvavail_shift = INFINIPATH_I_RCVAVAIL_SHIFT;
+	dd->ipath_i_rcvurg_shift = INFINIPATH_I_RCVURG_SHIFT;
 
 	/*
 	 * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
@@ -1217,9 +1259,17 @@ static void ipath_init_ht_variables(struct ipath_devdata *dd)
 		INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
 		INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
 
-	dd->ipath_eep_st_masks[2].errs_to_log =
-		INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET;
+	dd->ipath_eep_st_masks[2].errs_to_log = INFINIPATH_E_RESET;
 
+	dd->delay_mult = 2; /* SDR, 4X, can't change */
+
+	dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
+	dd->ipath_link_speed_supported = IPATH_IB_SDR;
+	dd->ipath_link_width_enabled = IB_WIDTH_4X;
+	dd->ipath_link_speed_enabled = dd->ipath_link_speed_supported;
+	/* these can't change for this chip, so set once */
+	dd->ipath_link_width_active = dd->ipath_link_width_enabled;
+	dd->ipath_link_speed_active = dd->ipath_link_speed_enabled;
 }
 
 /**
@@ -1281,6 +1331,9 @@ static void ipath_ht_init_hwerrors(struct ipath_devdata *dd)
 	dd->ipath_hwerrmask = val;
 }
 
+
+
+
 /**
  * ipath_ht_bringup_serdes - bring up the serdes
  * @dd: the infinipath device
@@ -1439,6 +1492,7 @@ static void ipath_ht_put_tid(struct ipath_devdata *dd,
 			pa |= lenvalid | INFINIPATH_RT_VALID;
 		}
 	}
+
 	writeq(pa, tidptr);
 }
 
@@ -1644,6 +1698,13 @@ static void ipath_ht_free_irq(struct ipath_devdata *dd)
 	dd->ipath_intconfig = 0;
 }
 
+static struct ipath_message_header *
+ipath_ht_get_msgheader(struct ipath_devdata *dd, __le32 *rhf_addr)
+{
+	return (struct ipath_message_header *)
+		&rhf_addr[sizeof(u64) / sizeof(u32)];
+}
+
 static void ipath_ht_config_ports(struct ipath_devdata *dd, ushort cfgports)
 {
 	dd->ipath_portcnt =
@@ -1757,6 +1818,90 @@ static void ipath_ht_read_counters(struct ipath_devdata *dd,
 	cntrs->RxDlidFltrCnt = 0;
 }
 
+
+/* no interrupt fallback for these chips */
+static int ipath_ht_nointr_fallback(struct ipath_devdata *dd)
+{
+	return 0;
+}
+
+
+/*
+ * reset the XGXS (between serdes and IBC).  Slightly less intrusive
+ * than resetting the IBC or external link state, and useful in some
+ * cases to cause some retraining.  To do this right, we reset IBC
+ * as well.
+ */
+static void ipath_ht_xgxs_reset(struct ipath_devdata *dd)
+{
+	u64 val, prev_val;
+
+	prev_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
+	val = prev_val | INFINIPATH_XGXS_RESET;
+	prev_val &= ~INFINIPATH_XGXS_RESET; /* be sure */
+	ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
+			 dd->ipath_control & ~INFINIPATH_C_LINKENABLE);
+	ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
+	ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
+	ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, prev_val);
+	ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
+			 dd->ipath_control);
+}
+
+
+static int ipath_ht_get_ib_cfg(struct ipath_devdata *dd, int which)
+{
+	int ret;
+
+	switch (which) {
+	case IPATH_IB_CFG_LWID:
+		ret = dd->ipath_link_width_active;
+		break;
+	case IPATH_IB_CFG_SPD:
+		ret = dd->ipath_link_speed_active;
+		break;
+	case IPATH_IB_CFG_LWID_ENB:
+		ret = dd->ipath_link_width_enabled;
+		break;
+	case IPATH_IB_CFG_SPD_ENB:
+		ret = dd->ipath_link_speed_enabled;
+		break;
+	default:
+		ret =  -ENOTSUPP;
+		break;
+	}
+	return ret;
+}
+
+
+/* we assume range checking is already done, if needed */
+static int ipath_ht_set_ib_cfg(struct ipath_devdata *dd, int which, u32 val)
+{
+	int ret = 0;
+
+	if (which == IPATH_IB_CFG_LWID_ENB)
+		dd->ipath_link_width_enabled = val;
+	else if (which == IPATH_IB_CFG_SPD_ENB)
+		dd->ipath_link_speed_enabled = val;
+	else
+		ret = -ENOTSUPP;
+	return ret;
+}
+
+
+static void ipath_ht_config_jint(struct ipath_devdata *dd, u16 a, u16 b)
+{
+}
+
+
+static int ipath_ht_ib_updown(struct ipath_devdata *dd, int ibup, u64 ibcs)
+{
+	ipath_setup_ht_setextled(dd, ipath_ib_linkstate(dd, ibcs),
+		ipath_ib_linktrstate(dd, ibcs));
+	return 0;
+}
+
+
 /**
  * ipath_init_iba6110_funcs - set up the chip-specific function pointers
  * @dd: the infinipath device
@@ -1781,24 +1926,19 @@ void ipath_init_iba6110_funcs(struct ipath_devdata *dd)
 	dd->ipath_f_setextled = ipath_setup_ht_setextled;
 	dd->ipath_f_get_base_info = ipath_ht_get_base_info;
 	dd->ipath_f_free_irq = ipath_ht_free_irq;
+	dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
+	dd->ipath_f_intr_fallback = ipath_ht_nointr_fallback;
+	dd->ipath_f_get_msgheader = ipath_ht_get_msgheader;
 	dd->ipath_f_config_ports = ipath_ht_config_ports;
 	dd->ipath_f_read_counters = ipath_ht_read_counters;
+	dd->ipath_f_xgxs_reset = ipath_ht_xgxs_reset;
+	dd->ipath_f_get_ib_cfg = ipath_ht_get_ib_cfg;
+	dd->ipath_f_set_ib_cfg = ipath_ht_set_ib_cfg;
+	dd->ipath_f_config_jint = ipath_ht_config_jint;
+	dd->ipath_f_ib_updown = ipath_ht_ib_updown;
 
 	/*
 	 * initialize chip-specific variables
 	 */
-	dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
-
-	/*
-	 * setup the register offsets, since they are different for each
-	 * chip
-	 */
-	dd->ipath_kregs = &ipath_ht_kregs;
-	dd->ipath_cregs = &ipath_ht_cregs;
-
-	/*
-	 * do very early init that is needed before ipath_f_bus is
-	 * called
-	 */
 	ipath_init_ht_variables(dd);
 }