Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/intr.c b/drivers/infiniband/hw/hfi1/intr.c
new file mode 100644
index 0000000000..70376e6dba
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/intr.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+/*
+ * Copyright(c) 2015, 2016 Intel Corporation.
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/bitmap.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "sdma.h"
+
+#define LINK_UP_DELAY  500  /* in microseconds */
+
+static void set_mgmt_allowed(struct hfi1_pportdata *ppd)
+{
+	u32 frame;
+	struct hfi1_devdata *dd = ppd->dd;
+
+	if (ppd->neighbor_type == NEIGHBOR_TYPE_HFI) {
+		ppd->mgmt_allowed = 1;
+	} else {
+		read_8051_config(dd, REMOTE_LNI_INFO, GENERAL_CONFIG, &frame);
+		ppd->mgmt_allowed = (frame >> MGMT_ALLOWED_SHIFT)
+		& MGMT_ALLOWED_MASK;
+	}
+}
+
+/*
+ * Our neighbor has indicated that we are allowed to act as a fabric
+ * manager, so place the full management partition key in the second
+ * (0-based) pkey array position. Note that we should already have
+ * the limited management partition key in array element 1, and also
+ * that the port is not yet up when add_full_mgmt_pkey() is invoked.
+ */
+static void add_full_mgmt_pkey(struct hfi1_pportdata *ppd)
+{
+	struct hfi1_devdata *dd = ppd->dd;
+
+	/* Sanity check - ppd->pkeys[2] should be 0, or already initialized */
+	if (!((ppd->pkeys[2] == 0) || (ppd->pkeys[2] == FULL_MGMT_P_KEY)))
+		dd_dev_warn(dd, "%s pkey[2] already set to 0x%x, resetting it to 0x%x\n",
+			    __func__, ppd->pkeys[2], FULL_MGMT_P_KEY);
+	ppd->pkeys[2] = FULL_MGMT_P_KEY;
+	(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
+	hfi1_event_pkey_change(ppd->dd, ppd->port);
+}
+
+/**
+ * format_hwmsg - format a single hwerror message
+ * @msg: message buffer
+ * @msgl: length of message buffer
+ * @hwmsg: message to add to message buffer
+ */
+static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg)
+{
+	strlcat(msg, "[", msgl);
+	strlcat(msg, hwmsg, msgl);
+	strlcat(msg, "]", msgl);
+}
+
+/**
+ * hfi1_format_hwerrors - format hardware error messages for display
+ * @hwerrs: hardware errors bit vector
+ * @hwerrmsgs: hardware error descriptions
+ * @nhwerrmsgs: number of hwerrmsgs
+ * @msg: message buffer
+ * @msgl: message buffer length
+ */
+void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs,
+			  size_t nhwerrmsgs, char *msg, size_t msgl)
+{
+	int i;
+
+	for (i = 0; i < nhwerrmsgs; i++)
+		if (hwerrs & hwerrmsgs[i].mask)
+			format_hwmsg(msg, msgl, hwerrmsgs[i].msg);
+}
+
+static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev)
+{
+	struct ib_event event;
+	struct hfi1_devdata *dd = ppd->dd;
+
+	/*
+	 * Only call ib_dispatch_event() if the IB device has been
+	 * registered.  HFI1_INITED is set iff the driver has successfully
+	 * registered with the IB core.
+	 */
+	if (!(dd->flags & HFI1_INITTED))
+		return;
+	event.device = &dd->verbs_dev.rdi.ibdev;
+	event.element.port_num = ppd->port;
+	event.event = ev;
+	ib_dispatch_event(&event);
+}
+
+/**
+ * handle_linkup_change - finish linkup/down state changes
+ * @dd: valid device
+ * @linkup: link state information
+ *
+ * Handle a linkup or link down notification.
+ * The HW needs time to finish its link up state change. Give it that chance.
+ *
+ * This is called outside an interrupt.
+ *
+ */
+void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
+{
+	struct hfi1_pportdata *ppd = &dd->pport[0];
+	enum ib_event_type ev;
+
+	if (!(ppd->linkup ^ !!linkup))
+		return;	/* no change, nothing to do */
+
+	if (linkup) {
+		/*
+		 * Quick linkup and all link up on the simulator does not
+		 * trigger or implement:
+		 *	- VerifyCap interrupt
+		 *	- VerifyCap frames
+		 * But rather moves directly to LinkUp.
+		 *
+		 * Do the work of the VerifyCap interrupt handler,
+		 * handle_verify_cap(), but do not try moving the state to
+		 * LinkUp as we are already there.
+		 *
+		 * NOTE: This uses this device's vAU, vCU, and vl15_init for
+		 * the remote values.  Both sides must be using the values.
+		 */
+		if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
+			set_up_vau(dd, dd->vau);
+			set_up_vl15(dd, dd->vl15_init);
+			assign_remote_cm_au_table(dd, dd->vcu);
+		}
+
+		ppd->neighbor_guid =
+			read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
+		ppd->neighbor_type =
+			read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
+				 DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
+		ppd->neighbor_port_number =
+			read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
+				 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
+		ppd->neighbor_fm_security =
+			read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
+				 DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
+		dd_dev_info(dd,
+			    "Neighbor Guid %llx, Type %d, Port Num %d\n",
+			    ppd->neighbor_guid, ppd->neighbor_type,
+			    ppd->neighbor_port_number);
+
+		/* HW needs LINK_UP_DELAY to settle, give it that chance */
+		udelay(LINK_UP_DELAY);
+
+		/*
+		 * 'MgmtAllowed' information, which is exchanged during
+		 * LNI, is available at this point.
+		 */
+		set_mgmt_allowed(ppd);
+
+		if (ppd->mgmt_allowed)
+			add_full_mgmt_pkey(ppd);
+
+		/* physical link went up */
+		ppd->linkup = 1;
+		ppd->offline_disabled_reason =
+			HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE);
+
+		/* link widths are not available until the link is fully up */
+		get_linkup_link_widths(ppd);
+
+	} else {
+		/* physical link went down */
+		ppd->linkup = 0;
+
+		/* clear HW details of the previous connection */
+		ppd->actual_vls_operational = 0;
+		reset_link_credits(dd);
+
+		/* freeze after a link down to guarantee a clean egress */
+		start_freeze_handling(ppd, FREEZE_SELF | FREEZE_LINK_DOWN);
+
+		ev = IB_EVENT_PORT_ERR;
+
+		hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT);
+
+		/* if we are down, the neighbor is down */
+		ppd->neighbor_normal = 0;
+
+		/* notify IB of the link change */
+		signal_ib_event(ppd, ev);
+	}
+}
+
+/*
+ * Handle receive or urgent interrupts for user contexts.  This means a user
+ * process was waiting for a packet to arrive, and didn't want to poll.
+ */
+void handle_user_interrupt(struct hfi1_ctxtdata *rcd)
+{
+	struct hfi1_devdata *dd = rcd->dd;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dd->uctxt_lock, flags);
+	if (bitmap_empty(rcd->in_use_ctxts, HFI1_MAX_SHARED_CTXTS))
+		goto done;
+
+	if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) {
+		wake_up_interruptible(&rcd->wait);
+		hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd);
+	} else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG,
+							&rcd->event_flags)) {
+		rcd->urgent++;
+		wake_up_interruptible(&rcd->wait);
+	}
+done:
+	spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+}