Merge branch 'wip/dl-for-next' into for-next

Due to concurrent work by myself and Jason, a normal fast forward merge
was not possible.  This brings in a number of hfi1 changes, mainly the
hfi1 TID RDMA support (roughly 10,000 LOC change), which was reviewed
and integrated over a period of days.
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/Makefile

@@ -24,6 +24,7 @@ hfi1-y := \
 	mad.o \
 	mmu_rb.o \
 	msix.o \
+	opfn.o \
 	pcie.o \
 	pio.o \
 	pio_copy.o \

drivers/infiniband/hw/hfi1/chip.c

@@ -4253,6 +4253,8 @@ static struct cntr_entry dev_cntrs[DEV_CNTR_LAST] = {
 			    access_sw_pio_drain),
 [C_SW_KMEM_WAIT] = CNTR_ELEM("KmemWait", 0, 0, CNTR_NORMAL,
 			    access_sw_kmem_wait),
+[C_SW_TID_WAIT] = CNTR_ELEM("TidWait", 0, 0, CNTR_NORMAL,
+			    hfi1_access_sw_tid_wait),
 [C_SW_SEND_SCHED] = CNTR_ELEM("SendSched", 0, 0, CNTR_NORMAL,
 			    access_sw_send_schedule),
 [C_SDMA_DESC_FETCHED_CNT] = CNTR_ELEM("SDEDscFdCn",
@@ -5222,6 +5224,17 @@ int is_bx(struct hfi1_devdata *dd)
 	return (chip_rev_minor & 0xF0) == 0x10;
 }
 
+/* return true is kernel urg disabled for rcd */
+bool is_urg_masked(struct hfi1_ctxtdata *rcd)
+{
+	u64 mask;
+	u32 is = IS_RCVURGENT_START + rcd->ctxt;
+	u8 bit = is % 64;
+
+	mask = read_csr(rcd->dd, CCE_INT_MASK + (8 * (is / 64)));
+	return !(mask & BIT_ULL(bit));
+}
+
 /*
  * Append string s to buffer buf.  Arguments curp and len are the current
  * position and remaining length, respectively.

drivers/infiniband/hw/hfi1/chip.h

 #ifndef _CHIP_H
 #define _CHIP_H
 /*
- * Copyright(c) 2015 - 2017 Intel Corporation.
+ * Copyright(c) 2015 - 2018 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -804,6 +804,7 @@ void clear_linkup_counters(struct hfi1_devdata *dd);
 u32 hdrqempty(struct hfi1_ctxtdata *rcd);
 int is_ax(struct hfi1_devdata *dd);
 int is_bx(struct hfi1_devdata *dd);
+bool is_urg_masked(struct hfi1_ctxtdata *rcd);
 u32 read_physical_state(struct hfi1_devdata *dd);
 u32 chip_to_opa_pstate(struct hfi1_devdata *dd, u32 chip_pstate);
 const char *opa_lstate_name(u32 lstate);
@@ -926,6 +927,7 @@ enum {
 	C_SW_PIO_WAIT,
 	C_SW_PIO_DRAIN,
 	C_SW_KMEM_WAIT,
+	C_SW_TID_WAIT,
 	C_SW_SEND_SCHED,
 	C_SDMA_DESC_FETCHED_CNT,
 	C_SDMA_INT_CNT,

drivers/infiniband/hw/hfi1/common.h

@@ -340,6 +340,10 @@ struct diag_pkt {
 
 #define HFI1_PSM_IOC_BASE_SEQ 0x0
 
+/* Number of BTH.PSN bits used for sequence number in expected rcvs */
+#define HFI1_KDETH_BTH_SEQ_SHIFT 11
+#define HFI1_KDETH_BTH_SEQ_MASK (BIT(HFI1_KDETH_BTH_SEQ_SHIFT) - 1)
+
 static inline __u64 rhf_to_cpu(const __le32 *rbuf)
 {
 	return __le64_to_cpu(*((__le64 *)rbuf));

drivers/infiniband/hw/hfi1/driver.c

@@ -1575,25 +1575,32 @@ static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
 	return -EINVAL;
 }
 
-void handle_eflags(struct hfi1_packet *packet)
+static void show_eflags_errs(struct hfi1_packet *packet)
 {
 	struct hfi1_ctxtdata *rcd = packet->rcd;
 	u32 rte = rhf_rcv_type_err(packet->rhf);
 
+	dd_dev_err(rcd->dd,
+		   "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
+		   rcd->ctxt, packet->rhf,
+		   packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
+		   packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
+		   packet->rhf & RHF_DC_ERR ? "dc " : "",
+		   packet->rhf & RHF_TID_ERR ? "tid " : "",
+		   packet->rhf & RHF_LEN_ERR ? "len " : "",
+		   packet->rhf & RHF_ECC_ERR ? "ecc " : "",
+		   packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
+		   packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
+		   rte);
+}
+
+void handle_eflags(struct hfi1_packet *packet)
+{
+	struct hfi1_ctxtdata *rcd = packet->rcd;
+
 	rcv_hdrerr(rcd, rcd->ppd, packet);
 	if (rhf_err_flags(packet->rhf))
-		dd_dev_err(rcd->dd,
-			   "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
-			   rcd->ctxt, packet->rhf,
-			   packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
-			   packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
-			   packet->rhf & RHF_DC_ERR ? "dc " : "",
-			   packet->rhf & RHF_TID_ERR ? "tid " : "",
-			   packet->rhf & RHF_LEN_ERR ? "len " : "",
-			   packet->rhf & RHF_ECC_ERR ? "ecc " : "",
-			   packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
-			   packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
-			   rte);
+		show_eflags_errs(packet);
 }
 
 /*
@@ -1699,11 +1706,14 @@ static int kdeth_process_expected(struct hfi1_packet *packet)
 	if (unlikely(hfi1_dbg_should_fault_rx(packet)))
 		return RHF_RCV_CONTINUE;
 
-	if (unlikely(rhf_err_flags(packet->rhf)))
-		handle_eflags(packet);
+	if (unlikely(rhf_err_flags(packet->rhf))) {
+		struct hfi1_ctxtdata *rcd = packet->rcd;
 
-	dd_dev_err(packet->rcd->dd,
-		   "Unhandled expected packet received. Dropping.\n");
+		if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
+			return RHF_RCV_CONTINUE;
+	}
+
+	hfi1_kdeth_expected_rcv(packet);
 	return RHF_RCV_CONTINUE;
 }
 
@@ -1712,11 +1722,17 @@ static int kdeth_process_eager(struct hfi1_packet *packet)
 	hfi1_setup_9B_packet(packet);
 	if (unlikely(hfi1_dbg_should_fault_rx(packet)))
 		return RHF_RCV_CONTINUE;
-	if (unlikely(rhf_err_flags(packet->rhf)))
-		handle_eflags(packet);
 
-	dd_dev_err(packet->rcd->dd,
-		   "Unhandled eager packet received. Dropping.\n");
+	trace_hfi1_rcvhdr(packet);
+	if (unlikely(rhf_err_flags(packet->rhf))) {
+		struct hfi1_ctxtdata *rcd = packet->rcd;
+
+		show_eflags_errs(packet);
+		if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
+			return RHF_RCV_CONTINUE;
+	}
+
+	hfi1_kdeth_eager_rcv(packet);
 	return RHF_RCV_CONTINUE;
 }
 

drivers/infiniband/hw/hfi1/hfi.h

@@ -73,6 +73,7 @@
 
 #include "chip_registers.h"
 #include "common.h"
+#include "opfn.h"
 #include "verbs.h"
 #include "pio.h"
 #include "chip.h"
@@ -98,6 +99,8 @@
 #define NEIGHBOR_TYPE_HFI		0
 #define NEIGHBOR_TYPE_SWITCH	1
 
+#define HFI1_MAX_ACTIVE_WORKQUEUE_ENTRIES 5
+
 extern unsigned long hfi1_cap_mask;
 #define HFI1_CAP_KGET_MASK(mask, cap) ((mask) & HFI1_CAP_##cap)
 #define HFI1_CAP_UGET_MASK(mask, cap) \
@@ -195,6 +198,14 @@ struct exp_tid_set {
 };
 
 typedef int (*rhf_rcv_function_ptr)(struct hfi1_packet *packet);
+
+struct tid_queue {
+	struct list_head queue_head;
+			/* queue head for QP TID resource waiters */
+	u32 enqueue;	/* count of tid enqueues */
+	u32 dequeue;	/* count of tid dequeues */
+};
+
 struct hfi1_ctxtdata {
 	/* rcvhdrq base, needs mmap before useful */
 	void *rcvhdrq;
@@ -288,6 +299,12 @@ struct hfi1_ctxtdata {
 	/* PSM Specific fields */
 	/* lock protecting all Expected TID data */
 	struct mutex exp_mutex;
+	/* lock protecting all Expected TID data of kernel contexts */
+	spinlock_t exp_lock;
+	/* Queue for QP's waiting for HW TID flows */
+	struct tid_queue flow_queue;
+	/* Queue for QP's waiting for HW receive array entries */
+	struct tid_queue rarr_queue;
 	/* when waiting for rcv or pioavail */
 	wait_queue_head_t wait;
 	/* uuid from PSM */
@@ -320,6 +337,9 @@ struct hfi1_ctxtdata {
 	 */
 	u8 subctxt_cnt;
 
+	/* Bit mask to track free TID RDMA HW flows */
+	unsigned long flow_mask;
+	struct tid_flow_state flows[RXE_NUM_TID_FLOWS];
 };
 
 /**
@@ -2100,7 +2120,7 @@ static inline u64 hfi1_pkt_default_send_ctxt_mask(struct hfi1_devdata *dd,
 			SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_TEST_SMASK |
 #endif
 			HFI1_PKT_USER_SC_INTEGRITY;
-	else
+	else if (ctxt_type != SC_KERNEL)
 		base_sc_integrity |= HFI1_PKT_KERNEL_SC_INTEGRITY;
 
 	/* turn on send-side job key checks if !A0 */

drivers/infiniband/hw/hfi1/init.c

@@ -72,7 +72,6 @@
 #undef pr_fmt
 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
 
-#define HFI1_MAX_ACTIVE_WORKQUEUE_ENTRIES 5
 /*
  * min buffers we want to have per context, after driver
  */
@@ -371,6 +370,9 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
 		rcd->rhf_rcv_function_map = normal_rhf_rcv_functions;
 
 		mutex_init(&rcd->exp_mutex);
+		spin_lock_init(&rcd->exp_lock);
+		INIT_LIST_HEAD(&rcd->flow_queue.queue_head);
+		INIT_LIST_HEAD(&rcd->rarr_queue.queue_head);
 
 		hfi1_cdbg(PROC, "setting up context %u\n", rcd->ctxt);
 
@@ -473,6 +475,9 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
 						    GFP_KERNEL, numa);
 			if (!rcd->opstats)
 				goto bail;
+
+			/* Initialize TID flow generations for the context */
+			hfi1_kern_init_ctxt_generations(rcd);
 		}
 
 		*context = rcd;
@@ -772,6 +777,8 @@ static void enable_chip(struct hfi1_devdata *dd)
 			rcvmask |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
 		if (HFI1_CAP_KGET_MASK(rcd->flags, NODROP_EGR_FULL))
 			rcvmask |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
+		if (HFI1_CAP_IS_KSET(TID_RDMA))
+			rcvmask |= HFI1_RCVCTRL_TIDFLOW_ENB;
 		hfi1_rcvctrl(dd, rcvmask, rcd);
 		sc_enable(rcd->sc);
 		hfi1_rcd_put(rcd);
@@ -927,6 +934,8 @@ int hfi1_init(struct hfi1_devdata *dd, int reinit)
 		lastfail = hfi1_create_rcvhdrq(dd, rcd);
 		if (!lastfail)
 			lastfail = hfi1_setup_eagerbufs(rcd);
+		if (!lastfail)
+			lastfail = hfi1_kern_exp_rcv_init(rcd, reinit);
 		if (lastfail) {
 			dd_dev_err(dd,
 				   "failed to allocate kernel ctxt's rcvhdrq and/or egr bufs\n");
@@ -1497,6 +1506,13 @@ static int __init hfi1_mod_init(void)
 	/* sanitize link CRC options */
 	link_crc_mask &= SUPPORTED_CRCS;
 
+	ret = opfn_init();
+	if (ret < 0) {
+		pr_err("Failed to allocate opfn_wq");
+		goto bail_dev;
+	}
+
+	hfi1_compute_tid_rdma_flow_wt();
 	/*
 	 * These must be called before the driver is registered with
 	 * the PCI subsystem.
@@ -1527,6 +1543,7 @@ module_init(hfi1_mod_init);
 static void __exit hfi1_mod_cleanup(void)
 {
 	pci_unregister_driver(&hfi1_pci_driver);
+	opfn_exit();
 	node_affinity_destroy_all();
 	hfi1_dbg_exit();
 
@@ -1581,7 +1598,7 @@ static void cleanup_device_data(struct hfi1_devdata *dd)
 		struct hfi1_ctxtdata *rcd = dd->rcd[ctxt];
 
 		if (rcd) {
-			hfi1_clear_tids(rcd);
+			hfi1_free_ctxt_rcv_groups(rcd);
 			hfi1_free_ctxt(rcd);
 		}
 	}

drivers/infiniband/hw/hfi1/iowait.c

@@ -6,6 +6,9 @@
 #include "iowait.h"
 #include "trace_iowait.h"
 
+/* 1 priority == 16 starve_cnt */
+#define IOWAIT_PRIORITY_STARVE_SHIFT 4
+
 void iowait_set_flag(struct iowait *wait, u32 flag)
 {
 	trace_hfi1_iowait_set(wait, flag);
@@ -44,7 +47,8 @@ void iowait_init(struct iowait *wait, u32 tx_limit,
 			      uint seq,
 			      bool pkts_sent),
 		 void (*wakeup)(struct iowait *wait, int reason),
-		 void (*sdma_drained)(struct iowait *wait))
+		 void (*sdma_drained)(struct iowait *wait),
+		 void (*init_priority)(struct iowait *wait))
 {
 	int i;
 
@@ -58,6 +62,7 @@ void iowait_init(struct iowait *wait, u32 tx_limit,
 	wait->sleep = sleep;
 	wait->wakeup = wakeup;
 	wait->sdma_drained = sdma_drained;
+	wait->init_priority = init_priority;
 	wait->flags = 0;
 	for (i = 0; i < IOWAIT_SES; i++) {
 		wait->wait[i].iow = wait;
@@ -92,3 +97,30 @@ int iowait_set_work_flag(struct iowait_work *w)
 	iowait_set_flag(w->iow, IOWAIT_PENDING_TID);
 	return IOWAIT_TID_SE;
 }
+
+/**
+ * iowait_priority_update_top - update the top priority entry
+ * @w: the iowait struct
+ * @top: a pointer to the top priority entry
+ * @idx: the index of the current iowait in an array
+ * @top_idx: the array index for the iowait entry that has the top priority
+ *
+ * This function is called to compare the priority of a given
+ * iowait with the given top priority entry. The top index will
+ * be returned.
+ */
+uint iowait_priority_update_top(struct iowait *w,
+				struct iowait *top,
+				uint idx, uint top_idx)
+{
+	u8 cnt, tcnt;
+
+	/* Convert priority into starve_cnt and compare the total.*/
+	cnt = (w->priority << IOWAIT_PRIORITY_STARVE_SHIFT) + w->starved_cnt;
+	tcnt = (top->priority << IOWAIT_PRIORITY_STARVE_SHIFT) +
+		top->starved_cnt;
+	if (cnt > tcnt)
+		return idx;
+	else
+		return top_idx;
+}

drivers/infiniband/hw/hfi1/iowait.h

@@ -100,6 +100,7 @@ struct iowait_work {
  * @sleep: no space callback
  * @wakeup: space callback wakeup
  * @sdma_drained: sdma count drained
+ * @init_priority: callback to manipulate priority
  * @lock: lock protected head of wait queue
  * @iowork: workqueue overhead
  * @wait_dma: wait for sdma_busy == 0
@@ -109,7 +110,7 @@ struct iowait_work {
  * @tx_limit: limit for overflow queuing
  * @tx_count: number of tx entry's in tx_head'ed list
  * @flags: wait flags (one per QP)
- * @wait: SE array
+ * @wait: SE array for multiple legs
  *
  * This is to be embedded in user's state structure
  * (QP or PQ).
@@ -120,10 +121,13 @@ struct iowait_work {
  * are callbacks for the ULP to implement
  * what ever queuing/dequeuing of
  * the embedded iowait and its containing struct
- * when a resource shortage like SDMA ring space is seen.
+ * when a resource shortage like SDMA ring space
+ * or PIO credit space is seen.
  *
  * Both potentially have locks help
- * so sleeping is not allowed.
+ * so sleeping is not allowed and it is not
+ * supported to submit txreqs from the wakeup
+ * call directly because of lock conflicts.
  *
  * The wait_dma member along with the iow
  *
@@ -143,6 +147,7 @@ struct iowait {
 		);
 	void (*wakeup)(struct iowait *wait, int reason);
 	void (*sdma_drained)(struct iowait *wait);
+	void (*init_priority)(struct iowait *wait);
 	seqlock_t *lock;
 	wait_queue_head_t wait_dma;
 	wait_queue_head_t wait_pio;
@@ -152,6 +157,7 @@ struct iowait {
 	u32 tx_limit;
 	u32 tx_count;
 	u8 starved_cnt;
+	u8 priority;
 	unsigned long flags;
 	struct iowait_work wait[IOWAIT_SES];
 };
@@ -171,7 +177,8 @@ void iowait_init(struct iowait *wait, u32 tx_limit,
 			      uint seq,
 			      bool pkts_sent),
 		 void (*wakeup)(struct iowait *wait, int reason),
-		 void (*sdma_drained)(struct iowait *wait));
+		 void (*sdma_drained)(struct iowait *wait),
+		 void (*init_priority)(struct iowait *wait));
 
 /**
  * iowait_schedule() - schedule the default send engine work
@@ -185,6 +192,18 @@ static inline bool iowait_schedule(struct iowait *wait,
 	return !!queue_work_on(cpu, wq, &wait->wait[IOWAIT_IB_SE].iowork);
 }
 
+/**
+ * iowait_tid_schedule - schedule the tid SE
+ * @wait: the iowait structure
+ * @wq: the work queue
+ * @cpu: the cpu
+ */
+static inline bool iowait_tid_schedule(struct iowait *wait,
+				       struct workqueue_struct *wq, int cpu)
+{
+	return !!queue_work_on(cpu, wq, &wait->wait[IOWAIT_TID_SE].iowork);
+}
+
 /**
  * iowait_sdma_drain() - wait for DMAs to drain
  *
@@ -327,6 +346,8 @@ static inline u16 iowait_get_desc(struct iowait_work *w)
 		tx = list_first_entry(&w->tx_head, struct sdma_txreq,
 				      list);
 		num_desc = tx->num_desc;
+		if (tx->flags & SDMA_TXREQ_F_VIP)
+			w->iow->priority++;
 	}
 	return num_desc;
 }
@@ -340,6 +361,37 @@ static inline u32 iowait_get_all_desc(struct iowait *w)
 	return num_desc;
 }
 
+static inline void iowait_update_priority(struct iowait_work *w)
+{
+	struct sdma_txreq *tx = NULL;
+
+	if (!list_empty(&w->tx_head)) {
+		tx = list_first_entry(&w->tx_head, struct sdma_txreq,
+				      list);
+		if (tx->flags & SDMA_TXREQ_F_VIP)
+			w->iow->priority++;
+	}
+}
+
+static inline void iowait_update_all_priority(struct iowait *w)
+{
+	iowait_update_priority(&w->wait[IOWAIT_IB_SE]);
+	iowait_update_priority(&w->wait[IOWAIT_TID_SE]);
+}
+
+static inline void iowait_init_priority(struct iowait *w)
+{
+	w->priority = 0;
+	if (w->init_priority)
+		w->init_priority(w);
+}
+
+static inline void iowait_get_priority(struct iowait *w)
+{
+	iowait_init_priority(w);
+	iowait_update_all_priority(w);
+}
+
 /**
  * iowait_queue - Put the iowait on a wait queue
  * @pkts_sent: have some packets been sent before queuing?
@@ -356,14 +408,18 @@ static inline void iowait_queue(bool pkts_sent, struct iowait *w,
 	/*
 	 * To play fair, insert the iowait at the tail of the wait queue if it
 	 * has already sent some packets; Otherwise, put it at the head.
+	 * However, if it has priority packets to send, also put it at the
+	 * head.
 	 */
-	if (pkts_sent) {
-		list_add_tail(&w->list, wait_head);
+	if (pkts_sent)
 		w->starved_cnt = 0;
-	} else {
-		list_add(&w->list, wait_head);
+	else
 		w->starved_cnt++;
-	}
+
+	if (w->priority > 0 || !pkts_sent)
+		list_add(&w->list, wait_head);
+	else
+		list_add_tail(&w->list, wait_head);
 }
 
 /**
@@ -380,27 +436,10 @@ static inline void iowait_starve_clear(bool pkts_sent, struct iowait *w)
 		w->starved_cnt = 0;
 }
 
-/**
- * iowait_starve_find_max - Find the maximum of the starve count
- * @w: the iowait struct
- * @max: a variable containing the max starve count
- * @idx: the index of the current iowait in an array
- * @max_idx: a variable containing the array index for the
- *         iowait entry that has the max starve count
- *
- * This function is called to compare the starve count of a
- * given iowait with the given max starve count. The max starve
- * count and the index will be updated if the iowait's start
- * count is larger.
- */
-static inline void iowait_starve_find_max(struct iowait *w, u8 *max,
-					  uint idx, uint *max_idx)
-{
-	if (w->starved_cnt > *max) {
-		*max = w->starved_cnt;
-		*max_idx = idx;
-	}
-}
+/* Update the top priority index */
+uint iowait_priority_update_top(struct iowait *w,
+				struct iowait *top,
+				uint idx, uint top_idx);
 
 /**
  * iowait_packet_queued() - determine if a packet is queued

drivers/infiniband/hw/hfi1/opfn.c

+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * Copyright(c) 2018 Intel Corporation.
+ *
+ */
+#include "hfi.h"
+#include "trace.h"
+#include "qp.h"
+#include "opfn.h"
+
+#define IB_BTHE_E                 BIT(IB_BTHE_E_SHIFT)
+
+#define OPFN_CODE(code) BIT((code) - 1)
+#define OPFN_MASK(code) OPFN_CODE(STL_VERBS_EXTD_##code)
+
+struct hfi1_opfn_type {
+	bool (*request)(struct rvt_qp *qp, u64 *data);
+	bool (*response)(struct rvt_qp *qp, u64 *data);
+	bool (*reply)(struct rvt_qp *qp, u64 data);
+	void (*error)(struct rvt_qp *qp);
+};
+
+static struct hfi1_opfn_type hfi1_opfn_handlers[STL_VERBS_EXTD_MAX] = {
+	[STL_VERBS_EXTD_TID_RDMA] = {
+		.request = tid_rdma_conn_req,
+		.response = tid_rdma_conn_resp,
+		.reply = tid_rdma_conn_reply,
+		.error = tid_rdma_conn_error,
+	},
+};
+
+static struct workqueue_struct *opfn_wq;
+
+static void opfn_schedule_conn_request(struct rvt_qp *qp);
+
+static bool hfi1_opfn_extended(u32 bth1)
+{
+	return !!(bth1 & IB_BTHE_E);
+}
+
+static void opfn_conn_request(struct rvt_qp *qp)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct ib_atomic_wr wr;
+	u16 mask, capcode;
+	struct hfi1_opfn_type *extd;
+	u64 data;
+	unsigned long flags;
+	int ret = 0;
+
+	trace_hfi1_opfn_state_conn_request(qp);
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	/*
+	 * Exit if the extended bit is not set, or if nothing is requested, or
+	 * if we have completed all requests, or if a previous request is in
+	 * progress
+	 */
+	if (!priv->opfn.extended || !priv->opfn.requested ||
+	    priv->opfn.requested == priv->opfn.completed || priv->opfn.curr)
+		goto done;
+
+	mask = priv->opfn.requested & ~priv->opfn.completed;
+	capcode = ilog2(mask & ~(mask - 1)) + 1;
+	if (capcode >= STL_VERBS_EXTD_MAX) {
+		priv->opfn.completed |= OPFN_CODE(capcode);
+		goto done;
+	}
+
+	extd = &hfi1_opfn_handlers[capcode];
+	if (!extd || !extd->request || !extd->request(qp, &data)) {
+		/*
+		 * Either there is no handler for this capability or the request
+		 * packet could not be generated. Either way, mark it as done so
+		 * we don't keep attempting to complete it.
+		 */
+		priv->opfn.completed |= OPFN_CODE(capcode);
+		goto done;
+	}
+
+	trace_hfi1_opfn_data_conn_request(qp, capcode, data);
+	data = (data & ~0xf) | capcode;
+
+	memset(&wr, 0, sizeof(wr));
+	wr.wr.opcode = IB_WR_OPFN;
+	wr.remote_addr = HFI1_VERBS_E_ATOMIC_VADDR;
+	wr.compare_add = data;
+
+	priv->opfn.curr = capcode;	/* A new request is now in progress */
+	/* Drop opfn.lock before calling ib_post_send() */
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+
+	ret = ib_post_send(&qp->ibqp, &wr.wr, NULL);
+	if (ret)
+		goto err;
+	trace_hfi1_opfn_state_conn_request(qp);
+	return;
+err:
+	trace_hfi1_msg_opfn_conn_request(qp, "ib_ost_send failed: ret = ",
+					 (u64)ret);
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	/*
+	 * In case of an unexpected error return from ib_post_send
+	 * clear opfn.curr and reschedule to try again
+	 */
+	priv->opfn.curr = STL_VERBS_EXTD_NONE;
+	opfn_schedule_conn_request(qp);
+done:
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+}
+
+void opfn_send_conn_request(struct work_struct *work)
+{
+	struct hfi1_opfn_data *od;
+	struct hfi1_qp_priv *qpriv;
+
+	od = container_of(work, struct hfi1_opfn_data, opfn_work);
+	qpriv = container_of(od, struct hfi1_qp_priv, opfn);
+
+	opfn_conn_request(qpriv->owner);
+}
+
+/*
+ * When QP s_lock is held in the caller, the OPFN request must be scheduled
+ * to a different workqueue to avoid double locking QP s_lock in call to
+ * ib_post_send in opfn_conn_request
+ */
+static void opfn_schedule_conn_request(struct rvt_qp *qp)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+
+	trace_hfi1_opfn_state_sched_conn_request(qp);
+	queue_work(opfn_wq, &priv->opfn.opfn_work);
+}
+
+void opfn_conn_response(struct rvt_qp *qp, struct rvt_ack_entry *e,
+			struct ib_atomic_eth *ateth)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	u64 data = be64_to_cpu(ateth->compare_data);
+	struct hfi1_opfn_type *extd;
+	u8 capcode;
+	unsigned long flags;
+
+	trace_hfi1_opfn_state_conn_response(qp);
+	capcode = data & 0xf;
+	trace_hfi1_opfn_data_conn_response(qp, capcode, data);
+	if (!capcode || capcode >= STL_VERBS_EXTD_MAX)
+		return;
+
+	extd = &hfi1_opfn_handlers[capcode];
+
+	if (!extd || !extd->response) {
+		e->atomic_data = capcode;
+		return;
+	}
+
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	if (priv->opfn.completed & OPFN_CODE(capcode)) {
+		/*
+		 * We are receiving a request for a feature that has already
+		 * been negotiated. This may mean that the other side has reset
+		 */
+		priv->opfn.completed &= ~OPFN_CODE(capcode);
+		if (extd->error)
+			extd->error(qp);
+	}
+
+	if (extd->response(qp, &data))
+		priv->opfn.completed |= OPFN_CODE(capcode);
+	e->atomic_data = (data & ~0xf) | capcode;
+	trace_hfi1_opfn_state_conn_response(qp);
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+}
+
+void opfn_conn_reply(struct rvt_qp *qp, u64 data)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct hfi1_opfn_type *extd;
+	u8 capcode;
+	unsigned long flags;
+
+	trace_hfi1_opfn_state_conn_reply(qp);
+	capcode = data & 0xf;
+	trace_hfi1_opfn_data_conn_reply(qp, capcode, data);
+	if (!capcode || capcode >= STL_VERBS_EXTD_MAX)
+		return;
+
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	/*
+	 * Either there is no previous request or the reply is not for the
+	 * current request
+	 */
+	if (!priv->opfn.curr || capcode != priv->opfn.curr)
+		goto done;
+
+	extd = &hfi1_opfn_handlers[capcode];
+
+	if (!extd || !extd->reply)
+		goto clear;
+
+	if (extd->reply(qp, data))
+		priv->opfn.completed |= OPFN_CODE(capcode);
+clear:
+	/*
+	 * Clear opfn.curr to indicate that the previous request is no longer in
+	 * progress
+	 */
+	priv->opfn.curr = STL_VERBS_EXTD_NONE;
+	trace_hfi1_opfn_state_conn_reply(qp);
+done:
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+}
+
+void opfn_conn_error(struct rvt_qp *qp)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct hfi1_opfn_type *extd = NULL;
+	unsigned long flags;
+	u16 capcode;
+
+	trace_hfi1_opfn_state_conn_error(qp);
+	trace_hfi1_msg_opfn_conn_error(qp, "error. qp state ", (u64)qp->state);
+	/*
+	 * The QP has gone into the Error state. We have to invalidate all
+	 * negotiated feature, including the one in progress (if any). The RC
+	 * QP handling will clean the WQE for the connection request.
+	 */
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	while (priv->opfn.completed) {
+		capcode = priv->opfn.completed & ~(priv->opfn.completed - 1);
+		extd = &hfi1_opfn_handlers[ilog2(capcode) + 1];
+		if (extd->error)
+			extd->error(qp);
+		priv->opfn.completed &= ~OPFN_CODE(capcode);
+	}
+	priv->opfn.extended = 0;
+	priv->opfn.requested = 0;
+	priv->opfn.curr = STL_VERBS_EXTD_NONE;
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+}
+
+void opfn_qp_init(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask)
+{
+	struct ib_qp *ibqp = &qp->ibqp;
+	struct hfi1_qp_priv *priv = qp->priv;
+	unsigned long flags;
+
+	if (attr_mask & IB_QP_RETRY_CNT)
+		priv->s_retry = attr->retry_cnt;
+
+	spin_lock_irqsave(&priv->opfn.lock, flags);
+	if (ibqp->qp_type == IB_QPT_RC && HFI1_CAP_IS_KSET(TID_RDMA)) {
+		struct tid_rdma_params *local = &priv->tid_rdma.local;
+
+		if (attr_mask & IB_QP_TIMEOUT)
+			priv->tid_retry_timeout_jiffies = qp->timeout_jiffies;
+		if (qp->pmtu == enum_to_mtu(OPA_MTU_4096) ||
+		    qp->pmtu == enum_to_mtu(OPA_MTU_8192)) {
+			tid_rdma_opfn_init(qp, local);
+			/*
+			 * We only want to set the OPFN requested bit when the
+			 * QP transitions to RTS.
+			 */
+			if (attr_mask & IB_QP_STATE &&
+			    attr->qp_state == IB_QPS_RTS) {
+				priv->opfn.requested |= OPFN_MASK(TID_RDMA);
+				/*
+				 * If the QP is transitioning to RTS and the
+				 * opfn.completed for TID RDMA has already been
+				 * set, the QP is being moved *back* into RTS.
+				 * We can now renegotiate the TID RDMA
+				 * parameters.
+				 */
+				if (priv->opfn.completed &
+				    OPFN_MASK(TID_RDMA)) {
+					priv->opfn.completed &=
+						~OPFN_MASK(TID_RDMA);
+					/*
+					 * Since the opfn.completed bit was
+					 * already set, it is safe to assume
+					 * that the opfn.extended is also set.
+					 */
+					opfn_schedule_conn_request(qp);
+				}
+			}
+		} else {
+			memset(local, 0, sizeof(*local));
+		}
+	}
+	spin_unlock_irqrestore(&priv->opfn.lock, flags);
+}
+
+void opfn_trigger_conn_request(struct rvt_qp *qp, u32 bth1)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+
+	if (!priv->opfn.extended && hfi1_opfn_extended(bth1) &&
+	    HFI1_CAP_IS_KSET(OPFN)) {
+		priv->opfn.extended = 1;
+		if (qp->state == IB_QPS_RTS)
+			opfn_conn_request(qp);
+	}
+}
+
+int opfn_init(void)
+{
+	opfn_wq = alloc_workqueue("hfi_opfn",
+				  WQ_SYSFS | WQ_HIGHPRI | WQ_CPU_INTENSIVE |
+				  WQ_MEM_RECLAIM,
+				  HFI1_MAX_ACTIVE_WORKQUEUE_ENTRIES);
+	if (!opfn_wq)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void opfn_exit(void)
+{
+	if (opfn_wq) {
+		destroy_workqueue(opfn_wq);
+		opfn_wq = NULL;
+	}
+}

drivers/infiniband/hw/hfi1/opfn.h

+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2018 Intel Corporation.
+ *
+ */
+#ifndef _HFI1_OPFN_H
+#define _HFI1_OPFN_H
+
+/**
+ * DOC: Omni Path Feature Negotion (OPFN)
+ *
+ * OPFN is a discovery protocol for Intel Omni-Path fabric that
+ * allows two RC QPs to negotiate a common feature that both QPs
+ * can support. Currently, the only OPA feature that OPFN
+ * supports is TID RDMA.
+ *
+ * Architecture
+ *
+ * OPFN involves the communication between two QPs on the HFI
+ * level on an Omni-Path fabric, and ULPs have no knowledge of
+ * OPFN at all.
+ *
+ * Implementation
+ *
+ * OPFN extends the existing IB RC protocol with the following
+ * changes:
+ * -- Uses Bit 24 (reserved) of DWORD 1 of Base Transport
+ *    Header (BTH1) to indicate that the RC QP supports OPFN;
+ * -- Uses a combination of RC COMPARE_SWAP opcode (0x13) and
+ *    the address U64_MAX (0xFFFFFFFFFFFFFFFF) as an OPFN
+ *    request; The 64-bit data carried with the request/response
+ *    contains the parameters for negotiation and will be
+ *    defined in tid_rdma.c file;
+ * -- Defines IB_WR_RESERVED3 as IB_WR_OPFN.
+ *
+ * The OPFN communication will be triggered when an RC QP
+ * receives a request with Bit 24 of BTH1 set. The responder QP
+ * will then post send an OPFN request with its local
+ * parameters, which will be sent to the requester QP once all
+ * existing requests on the responder QP side have been sent.
+ * Once the requester QP receives the OPFN request, it will
+ * keep a copy of the responder QP's parameters, and return a
+ * response packet with its own local parameters. The responder
+ * QP receives the response packet and keeps a copy of the requester
+ * QP's parameters. After this exchange, each side has the parameters
+ * for both sides and therefore can select the right parameters
+ * for future transactions
+ */
+
+/* STL Verbs Extended */
+#define IB_BTHE_E_SHIFT           24
+#define HFI1_VERBS_E_ATOMIC_VADDR U64_MAX
+
+struct ib_atomic_eth;
+
+enum hfi1_opfn_codes {
+	STL_VERBS_EXTD_NONE = 0,
+	STL_VERBS_EXTD_TID_RDMA,
+	STL_VERBS_EXTD_MAX
+};
+
+struct hfi1_opfn_data {
+	u8 extended;
+	u16 requested;
+	u16 completed;
+	enum hfi1_opfn_codes curr;
+	/* serialize opfn function calls */
+	spinlock_t lock;
+	struct work_struct opfn_work;
+};
+
+/* WR opcode for OPFN */
+#define IB_WR_OPFN IB_WR_RESERVED3
+
+void opfn_send_conn_request(struct work_struct *work);
+void opfn_conn_response(struct rvt_qp *qp, struct rvt_ack_entry *e,
+			struct ib_atomic_eth *ateth);
+void opfn_conn_reply(struct rvt_qp *qp, u64 data);
+void opfn_conn_error(struct rvt_qp *qp);
+void opfn_qp_init(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask);
+void opfn_trigger_conn_request(struct rvt_qp *qp, u32 bth1);
+int opfn_init(void);
+void opfn_exit(void);
+
+#endif /* _HFI1_OPFN_H */

drivers/infiniband/hw/hfi1/pio.c

@@ -1599,8 +1599,7 @@ static void sc_piobufavail(struct send_context *sc)
 	struct rvt_qp *qp;
 	struct hfi1_qp_priv *priv;
 	unsigned long flags;
-	uint i, n = 0, max_idx = 0;
-	u8 max_starved_cnt = 0;
+	uint i, n = 0, top_idx = 0;
 
 	if (dd->send_contexts[sc->sw_index].type != SC_KERNEL &&
 	    dd->send_contexts[sc->sw_index].type != SC_VL15)
@@ -1619,11 +1618,18 @@ static void sc_piobufavail(struct send_context *sc)
 		if (n == ARRAY_SIZE(qps))
 			break;
 		wait = list_first_entry(list, struct iowait, list);
+		iowait_get_priority(wait);
 		qp = iowait_to_qp(wait);
 		priv = qp->priv;
 		list_del_init(&priv->s_iowait.list);
 		priv->s_iowait.lock = NULL;
-		iowait_starve_find_max(wait, &max_starved_cnt, n, &max_idx);
+		if (n) {
+			priv = qps[top_idx]->priv;
+			top_idx = iowait_priority_update_top(wait,
+							     &priv->s_iowait,
+							     n, top_idx);
+		}
+
 		/* refcount held until actual wake up */
 		qps[n++] = qp;
 	}
@@ -1638,12 +1644,12 @@ static void sc_piobufavail(struct send_context *sc)
 	}
 	write_sequnlock_irqrestore(&sc->waitlock, flags);
 
-	/* Wake up the most starved one first */
+	/* Wake up the top-priority one first */
 	if (n)
-		hfi1_qp_wakeup(qps[max_idx],
+		hfi1_qp_wakeup(qps[top_idx],
 			       RVT_S_WAIT_PIO | HFI1_S_WAIT_PIO_DRAIN);
 	for (i = 0; i < n; i++)
-		if (i != max_idx)
+		if (i != top_idx)
 			hfi1_qp_wakeup(qps[i],
 				       RVT_S_WAIT_PIO | HFI1_S_WAIT_PIO_DRAIN);
 }

drivers/infiniband/hw/hfi1/qp.c

@@ -132,6 +132,18 @@ const struct rvt_operation_params hfi1_post_parms[RVT_OPERATION_MAX] = {
 	.qpt_support = BIT(IB_QPT_RC),
 },
 
+[IB_WR_OPFN] = {
+	.length = sizeof(struct ib_atomic_wr),
+	.qpt_support = BIT(IB_QPT_RC),
+	.flags = RVT_OPERATION_USE_RESERVE,
+},
+
+[IB_WR_TID_RDMA_WRITE] = {
+	.length = sizeof(struct ib_rdma_wr),
+	.qpt_support = BIT(IB_QPT_RC),
+	.flags = RVT_OPERATION_IGN_RNR_CNT,
+},
+
 };
 
 static void flush_list_head(struct list_head *l)
@@ -285,6 +297,8 @@ void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
 		priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc);
 		qp_set_16b(qp);
 	}
+
+	opfn_qp_init(qp, attr, attr_mask);
 }
 
 /**
@@ -311,6 +325,7 @@ int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, bool *call_send)
 
 	switch (qp->ibqp.qp_type) {
 	case IB_QPT_RC:
+		hfi1_setup_tid_rdma_wqe(qp, wqe);
 	case IB_QPT_UC:
 		if (wqe->length > 0x80000000U)
 			return -EINVAL;
@@ -422,6 +437,11 @@ static void hfi1_qp_schedule(struct rvt_qp *qp)
 		if (ret)
 			iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_IB);
 	}
+	if (iowait_flag_set(&priv->s_iowait, IOWAIT_PENDING_TID)) {
+		ret = hfi1_schedule_tid_send(qp);
+		if (ret)
+			iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_TID);
+	}
 }
 
 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag)
@@ -441,8 +461,27 @@ void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag)
 
 void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait)
 {
-	if (iowait_set_work_flag(wait) == IOWAIT_IB_SE)
+	struct hfi1_qp_priv *priv = qp->priv;
+
+	if (iowait_set_work_flag(wait) == IOWAIT_IB_SE) {
 		qp->s_flags &= ~RVT_S_BUSY;
+		/*
+		 * If we are sending a first-leg packet from the second leg,
+		 * we need to clear the busy flag from priv->s_flags to
+		 * avoid a race condition when the qp wakes up before
+		 * the call to hfi1_verbs_send() returns to the second
+		 * leg. In that case, the second leg will terminate without
+		 * being re-scheduled, resulting in failure to send TID RDMA
+		 * WRITE DATA and TID RDMA ACK packets.
+		 */
+		if (priv->s_flags & HFI1_S_TID_BUSY_SET) {
+			priv->s_flags &= ~(HFI1_S_TID_BUSY_SET |
+					   RVT_S_BUSY);
+			iowait_set_flag(&priv->s_iowait, IOWAIT_PENDING_TID);
+		}
+	} else {
+		priv->s_flags &= ~RVT_S_BUSY;
+	}
 }
 
 static int iowait_sleep(
@@ -479,6 +518,7 @@ static int iowait_sleep(
 
 			ibp->rvp.n_dmawait++;
 			qp->s_flags |= RVT_S_WAIT_DMA_DESC;
+			iowait_get_priority(&priv->s_iowait);
 			iowait_queue(pkts_sent, &priv->s_iowait,
 				     &sde->dmawait);
 			priv->s_iowait.lock = &sde->waitlock;
@@ -528,6 +568,17 @@ static void iowait_sdma_drained(struct iowait *wait)
 	spin_unlock_irqrestore(&qp->s_lock, flags);
 }
 
+static void hfi1_init_priority(struct iowait *w)
+{
+	struct rvt_qp *qp = iowait_to_qp(w);
+	struct hfi1_qp_priv *priv = qp->priv;
+
+	if (qp->s_flags & RVT_S_ACK_PENDING)
+		w->priority++;
+	if (priv->s_flags & RVT_S_ACK_PENDING)
+		w->priority++;
+}
+
 /**
  * qp_to_sdma_engine - map a qp to a send engine
  * @qp: the QP
@@ -685,10 +736,11 @@ void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp)
 		&priv->s_iowait,
 		1,
 		_hfi1_do_send,
-		NULL,
+		_hfi1_do_tid_send,
 		iowait_sleep,
 		iowait_wakeup,
-		iowait_sdma_drained);
+		iowait_sdma_drained,
+		hfi1_init_priority);
 	return priv;
 }
 
@@ -696,6 +748,7 @@ void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp)
 {
 	struct hfi1_qp_priv *priv = qp->priv;
 
+	hfi1_qp_priv_tid_free(rdi, qp);
 	kfree(priv->s_ahg);
 	kfree(priv);
 }
@@ -729,6 +782,7 @@ void flush_qp_waiters(struct rvt_qp *qp)
 {
 	lockdep_assert_held(&qp->s_lock);
 	flush_iowait(qp);
+	hfi1_tid_rdma_flush_wait(qp);
 }
 
 void stop_send_queue(struct rvt_qp *qp)
@@ -736,12 +790,16 @@ void stop_send_queue(struct rvt_qp *qp)
 	struct hfi1_qp_priv *priv = qp->priv;
 
 	iowait_cancel_work(&priv->s_iowait);
+	if (cancel_work_sync(&priv->tid_rdma.trigger_work))
+		rvt_put_qp(qp);
 }
 
 void quiesce_qp(struct rvt_qp *qp)
 {
 	struct hfi1_qp_priv *priv = qp->priv;
 
+	hfi1_del_tid_reap_timer(qp);
+	hfi1_del_tid_retry_timer(qp);
 	iowait_sdma_drain(&priv->s_iowait);
 	qp_pio_drain(qp);
 	flush_tx_list(qp);
@@ -749,8 +807,13 @@ void quiesce_qp(struct rvt_qp *qp)
 
 void notify_qp_reset(struct rvt_qp *qp)
 {
+	hfi1_qp_kern_exp_rcv_clear_all(qp);
 	qp->r_adefered = 0;
 	clear_ahg(qp);
+
+	/* Clear any OPFN state */
+	if (qp->ibqp.qp_type == IB_QPT_RC)
+		opfn_conn_error(qp);
 }
 
 /*
@@ -832,7 +895,8 @@ void notify_error_qp(struct rvt_qp *qp)
 	if (lock) {
 		write_seqlock(lock);
 		if (!list_empty(&priv->s_iowait.list) &&
-		    !(qp->s_flags & RVT_S_BUSY)) {
+		    !(qp->s_flags & RVT_S_BUSY) &&
+		    !(priv->s_flags & RVT_S_BUSY)) {
 			qp->s_flags &= ~RVT_S_ANY_WAIT_IO;
 			list_del_init(&priv->s_iowait.list);
 			priv->s_iowait.lock = NULL;
@@ -841,7 +905,8 @@ void notify_error_qp(struct rvt_qp *qp)
 		write_sequnlock(lock);
 	}
 
-	if (!(qp->s_flags & RVT_S_BUSY)) {
+	if (!(qp->s_flags & RVT_S_BUSY) && !(priv->s_flags & RVT_S_BUSY)) {
+		qp->s_hdrwords = 0;
 		if (qp->s_rdma_mr) {
 			rvt_put_mr(qp->s_rdma_mr);
 			qp->s_rdma_mr = NULL;

drivers/infiniband/hw/hfi1/qp.h

@@ -63,11 +63,17 @@ extern const struct rvt_operation_params hfi1_post_parms[];
  * HFI1_S_AHG_VALID - ahg header valid on chip
  * HFI1_S_AHG_CLEAR - have send engine clear ahg state
  * HFI1_S_WAIT_PIO_DRAIN - qp waiting for PIOs to drain
+ * HFI1_S_WAIT_TID_SPACE - a QP is waiting for TID resource
+ * HFI1_S_WAIT_TID_RESP - waiting for a TID RDMA WRITE response
+ * HFI1_S_WAIT_HALT - halt the first leg send engine
  * HFI1_S_MIN_BIT_MASK - the lowest bit that can be used by hfi1
  */
 #define HFI1_S_AHG_VALID         0x80000000
 #define HFI1_S_AHG_CLEAR         0x40000000
 #define HFI1_S_WAIT_PIO_DRAIN    0x20000000
+#define HFI1_S_WAIT_TID_SPACE    0x10000000
+#define HFI1_S_WAIT_TID_RESP     0x08000000
+#define HFI1_S_WAIT_HALT         0x04000000
 #define HFI1_S_MIN_BIT_MASK      0x01000000
 
 /*
@@ -76,6 +82,7 @@ extern const struct rvt_operation_params hfi1_post_parms[];
 
 #define HFI1_S_ANY_WAIT_IO (RVT_S_ANY_WAIT_IO | HFI1_S_WAIT_PIO_DRAIN)
 #define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
+#define HFI1_S_ANY_TID_WAIT_SEND (RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA)
 
 /*
  * Send if not busy or waiting for I/O and either

drivers/infiniband/hw/hfi1/rc.h

+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2018 Intel Corporation.
+ *
+ */
+
+#ifndef HFI1_RC_H
+#define HFI1_RC_H
+
+/* cut down ridiculously long IB macro names */
+#define OP(x) IB_OPCODE_RC_##x
+
+static inline void update_ack_queue(struct rvt_qp *qp, unsigned int n)
+{
+	unsigned int next;
+
+	next = n + 1;
+	if (next > rvt_size_atomic(ib_to_rvt(qp->ibqp.device)))
+		next = 0;
+	qp->s_tail_ack_queue = next;
+	qp->s_acked_ack_queue = next;
+	qp->s_ack_state = OP(ACKNOWLEDGE);
+}
+
+static inline void rc_defered_ack(struct hfi1_ctxtdata *rcd,
+				  struct rvt_qp *qp)
+{
+	if (list_empty(&qp->rspwait)) {
+		qp->r_flags |= RVT_R_RSP_NAK;
+		rvt_get_qp(qp);
+		list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+	}
+}
+
+static inline u32 restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe,
+			      u32 psn, u32 pmtu)
+{
+	u32 len;
+
+	len = delta_psn(psn, wqe->psn) * pmtu;
+	return rvt_restart_sge(ss, wqe, len);
+}
+
+struct rvt_ack_entry *find_prev_entry(struct rvt_qp *qp, u32 psn, u8 *prev,
+				      u8 *prev_ack, bool *scheduled);
+int do_rc_ack(struct rvt_qp *qp, u32 aeth, u32 psn, int opcode, u64 val,
+	      struct hfi1_ctxtdata *rcd);
+struct rvt_swqe *do_rc_completion(struct rvt_qp *qp, struct rvt_swqe *wqe,
+				  struct hfi1_ibport *ibp);
+
+#endif /* HFI1_RC_H */

drivers/infiniband/hw/hfi1/ruc.c

@@ -250,7 +250,6 @@ static inline void hfi1_make_ruc_bth(struct rvt_qp *qp,
 				     struct ib_other_headers *ohdr,
 				     u32 bth0, u32 bth1, u32 bth2)
 {
-	bth1 |= qp->remote_qpn;
 	ohdr->bth[0] = cpu_to_be32(bth0);
 	ohdr->bth[1] = cpu_to_be32(bth1);
 	ohdr->bth[2] = cpu_to_be32(bth2);
@@ -272,13 +271,13 @@ static inline void hfi1_make_ruc_bth(struct rvt_qp *qp,
  */
 static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
 					    struct ib_other_headers *ohdr,
-					    u32 bth0, u32 bth2, int middle,
+					    u32 bth0, u32 bth1, u32 bth2,
+					    int middle,
 					    struct hfi1_pkt_state *ps)
 {
 	struct hfi1_qp_priv *priv = qp->priv;
 	struct hfi1_ibport *ibp = ps->ibp;
 	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
-	u32 bth1 = 0;
 	u32 slid;
 	u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
 	u8 l4 = OPA_16B_L4_IB_LOCAL;
@@ -360,12 +359,12 @@ static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
  */
 static inline void hfi1_make_ruc_header_9B(struct rvt_qp *qp,
 					   struct ib_other_headers *ohdr,
-					   u32 bth0, u32 bth2, int middle,
+					   u32 bth0, u32 bth1, u32 bth2,
+					   int middle,
 					   struct hfi1_pkt_state *ps)
 {
 	struct hfi1_qp_priv *priv = qp->priv;
 	struct hfi1_ibport *ibp = ps->ibp;
-	u32 bth1 = 0;
 	u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
 	u16 lrh0 = HFI1_LRH_BTH;
 	u8 extra_bytes = -ps->s_txreq->s_cur_size & 3;
@@ -415,7 +414,7 @@ static inline void hfi1_make_ruc_header_9B(struct rvt_qp *qp,
 
 typedef void (*hfi1_make_ruc_hdr)(struct rvt_qp *qp,
 				  struct ib_other_headers *ohdr,
-				  u32 bth0, u32 bth2, int middle,
+				  u32 bth0, u32 bth1, u32 bth2, int middle,
 				  struct hfi1_pkt_state *ps);
 
 /* We support only two types - 9B and 16B for now */
@@ -425,7 +424,7 @@ static const hfi1_make_ruc_hdr hfi1_ruc_header_tbl[2] = {
 };
 
 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
-			  u32 bth0, u32 bth2, int middle,
+			  u32 bth0, u32 bth1, u32 bth2, int middle,
 			  struct hfi1_pkt_state *ps)
 {
 	struct hfi1_qp_priv *priv = qp->priv;
@@ -446,18 +445,21 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 	priv->s_ahg->ahgidx = 0;
 
 	/* Make the appropriate header */
-	hfi1_ruc_header_tbl[priv->hdr_type](qp, ohdr, bth0, bth2, middle, ps);
+	hfi1_ruc_header_tbl[priv->hdr_type](qp, ohdr, bth0, bth1, bth2, middle,
+					    ps);
 }
 
 /* when sending, force a reschedule every one of these periods */
 #define SEND_RESCHED_TIMEOUT (5 * HZ)  /* 5s in jiffies */
 
 /**
- * schedule_send_yield - test for a yield required for QP send engine
+ * hfi1_schedule_send_yield - test for a yield required for QP
+ * send engine
  * @timeout: Final time for timeout slice for jiffies
  * @qp: a pointer to QP
  * @ps: a pointer to a structure with commonly lookup values for
  *      the the send engine progress
+ * @tid - true if it is the tid leg
  *
  * This routine checks if the time slice for the QP has expired
  * for RC QPs, if so an additional work entry is queued. At this
@@ -465,8 +467,8 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
  * returns true if a yield is required, otherwise, false
  * is returned.
  */
-static bool schedule_send_yield(struct rvt_qp *qp,
-				struct hfi1_pkt_state *ps)
+bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+			      bool tid)
 {
 	ps->pkts_sent = true;
 
@@ -474,8 +476,24 @@ static bool schedule_send_yield(struct rvt_qp *qp,
 		if (!ps->in_thread ||
 		    workqueue_congested(ps->cpu, ps->ppd->hfi1_wq)) {
 			spin_lock_irqsave(&qp->s_lock, ps->flags);
-			qp->s_flags &= ~RVT_S_BUSY;
-			hfi1_schedule_send(qp);
+			if (!tid) {
+				qp->s_flags &= ~RVT_S_BUSY;
+				hfi1_schedule_send(qp);
+			} else {
+				struct hfi1_qp_priv *priv = qp->priv;
+
+				if (priv->s_flags &
+				    HFI1_S_TID_BUSY_SET) {
+					qp->s_flags &= ~RVT_S_BUSY;
+					priv->s_flags &=
+						~(HFI1_S_TID_BUSY_SET |
+						  RVT_S_BUSY);
+				} else {
+					priv->s_flags &= ~RVT_S_BUSY;
+				}
+				hfi1_schedule_tid_send(qp);
+			}
+
 			spin_unlock_irqrestore(&qp->s_lock, ps->flags);
 			this_cpu_inc(*ps->ppd->dd->send_schedule);
 			trace_hfi1_rc_expired_time_slice(qp, true);
@@ -576,6 +594,8 @@ void hfi1_do_send(struct rvt_qp *qp, bool in_thread)
 	do {
 		/* Check for a constructed packet to be sent. */
 		if (ps.s_txreq) {
+			if (priv->s_flags & HFI1_S_TID_BUSY_SET)
+				qp->s_flags |= RVT_S_BUSY;
 			spin_unlock_irqrestore(&qp->s_lock, ps.flags);
 			/*
 			 * If the packet cannot be sent now, return and
@@ -585,7 +605,7 @@ void hfi1_do_send(struct rvt_qp *qp, bool in_thread)
 				return;
 
 			/* allow other tasks to run */
-			if (schedule_send_yield(qp, &ps))
+			if (hfi1_schedule_send_yield(qp, &ps, false))
 				return;
 
 			spin_lock_irqsave(&qp->s_lock, ps.flags);

drivers/infiniband/hw/hfi1/sdma.c

@@ -1747,10 +1747,9 @@ static inline u16 sdma_gethead(struct sdma_engine *sde)
  */
 static void sdma_desc_avail(struct sdma_engine *sde, uint avail)
 {
-	struct iowait *wait, *nw;
+	struct iowait *wait, *nw, *twait;
 	struct iowait *waits[SDMA_WAIT_BATCH_SIZE];
-	uint i, n = 0, seq, max_idx = 0;
-	u8 max_starved_cnt = 0;
+	uint i, n = 0, seq, tidx = 0;
 
 #ifdef CONFIG_SDMA_VERBOSITY
 	dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n", sde->this_idx,
@@ -1775,13 +1774,20 @@ static void sdma_desc_avail(struct sdma_engine *sde, uint avail)
 					continue;
 				if (n == ARRAY_SIZE(waits))
 					break;
+				iowait_init_priority(wait);
 				num_desc = iowait_get_all_desc(wait);
 				if (num_desc > avail)
 					break;
 				avail -= num_desc;
-				/* Find the most starved wait memeber */
-				iowait_starve_find_max(wait, &max_starved_cnt,
-						       n, &max_idx);
+				/* Find the top-priority wait memeber */
+				if (n) {
+					twait = waits[tidx];
+					tidx =
+					    iowait_priority_update_top(wait,
+								       twait,
+								       n,
+								       tidx);
+				}
 				list_del_init(&wait->list);
 				waits[n++] = wait;
 			}
@@ -1790,12 +1796,12 @@ static void sdma_desc_avail(struct sdma_engine *sde, uint avail)
 		}
 	} while (read_seqretry(&sde->waitlock, seq));
 
-	/* Schedule the most starved one first */
+	/* Schedule the top-priority entry first */
 	if (n)
-		waits[max_idx]->wakeup(waits[max_idx], SDMA_AVAIL_REASON);
+		waits[tidx]->wakeup(waits[tidx], SDMA_AVAIL_REASON);
 
 	for (i = 0; i < n; i++)
-		if (i != max_idx)
+		if (i != tidx)
 			waits[i]->wakeup(waits[i], SDMA_AVAIL_REASON);
 }
 

drivers/infiniband/hw/hfi1/sdma_txreq.h

@@ -91,6 +91,7 @@ struct sdma_desc {
 #define SDMA_TXREQ_F_URGENT       0x0001
 #define SDMA_TXREQ_F_AHG_COPY     0x0002
 #define SDMA_TXREQ_F_USE_AHG      0x0004
+#define SDMA_TXREQ_F_VIP          0x0010
 
 struct sdma_txreq;
 typedef void (*callback_t)(struct sdma_txreq *, int);

drivers/infiniband/hw/hfi1/trace.c

@@ -46,6 +46,7 @@
  */
 #define CREATE_TRACE_POINTS
 #include "trace.h"
+#include "exp_rcv.h"
 
 static u8 __get_ib_hdr_len(struct ib_header *hdr)
 {
@@ -128,6 +129,15 @@ const char *hfi1_trace_get_packet_l2_str(u8 l2)
 #define IETH_PRN "ieth rkey:0x%.8x"
 #define ATOMICACKETH_PRN "origdata:%llx"
 #define ATOMICETH_PRN "vaddr:0x%llx rkey:0x%.8x sdata:%llx cdata:%llx"
+#define TID_RDMA_KDETH "kdeth0 0x%x kdeth1 0x%x"
+#define TID_RDMA_KDETH_DATA "kdeth0 0x%x: kver %u sh %u intr %u tidctrl %u tid %x offset %x kdeth1 0x%x: jkey %x"
+#define TID_READ_REQ_PRN "tid_flow_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_READ_RSP_PRN "verbs_qp 0x%x"
+#define TID_WRITE_REQ_PRN "original_qp 0x%x"
+#define TID_WRITE_RSP_PRN "tid_flow_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_WRITE_DATA_PRN "verbs_qp 0x%x"
+#define TID_ACK_PRN "tid_flow_psn 0x%x verbs_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_RESYNC_PRN "verbs_qp 0x%x"
 
 #define OP(transport, op) IB_OPCODE_## transport ## _ ## op
 
@@ -322,6 +332,99 @@ const char *parse_everbs_hdrs(
 				 parse_syndrome(be32_to_cpu(eh->aeth) >> 24),
 				 be32_to_cpu(eh->aeth) & IB_MSN_MASK);
 		break;
+	case OP(TID_RDMA, WRITE_REQ):
+		trace_seq_printf(p, TID_RDMA_KDETH " " RETH_PRN " "
+				 TID_WRITE_REQ_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_req.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.w_req.kdeth1),
+				 ib_u64_get(&eh->tid_rdma.w_req.reth.vaddr),
+				 be32_to_cpu(eh->tid_rdma.w_req.reth.rkey),
+				 be32_to_cpu(eh->tid_rdma.w_req.reth.length),
+				 be32_to_cpu(eh->tid_rdma.w_req.verbs_qp));
+		break;
+	case OP(TID_RDMA, WRITE_RESP):
+		trace_seq_printf(p, TID_RDMA_KDETH " " AETH_PRN " "
+				 TID_WRITE_RSP_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_rsp.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.w_rsp.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.w_rsp.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.w_rsp.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.verbs_qp));
+		break;
+	case OP(TID_RDMA, WRITE_DATA_LAST):
+	case OP(TID_RDMA, WRITE_DATA):
+		trace_seq_printf(p, TID_RDMA_KDETH_DATA " " TID_WRITE_DATA_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_data.kdeth0),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, KVER),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, SH),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, INTR),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, TIDCTRL),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, TID),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, OFFSET),
+				 le32_to_cpu(eh->tid_rdma.w_data.kdeth1),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth1, JKEY),
+				 be32_to_cpu(eh->tid_rdma.w_data.verbs_qp));
+		break;
+	case OP(TID_RDMA, READ_REQ):
+		trace_seq_printf(p, TID_RDMA_KDETH " " RETH_PRN " "
+				 TID_READ_REQ_PRN,
+				 le32_to_cpu(eh->tid_rdma.r_req.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.r_req.kdeth1),
+				 ib_u64_get(&eh->tid_rdma.r_req.reth.vaddr),
+				 be32_to_cpu(eh->tid_rdma.r_req.reth.rkey),
+				 be32_to_cpu(eh->tid_rdma.r_req.reth.length),
+				 be32_to_cpu(eh->tid_rdma.r_req.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.r_req.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.r_req.verbs_qp));
+		break;
+	case OP(TID_RDMA, READ_RESP):
+		trace_seq_printf(p, TID_RDMA_KDETH_DATA " " AETH_PRN " "
+				 TID_READ_RSP_PRN,
+				 le32_to_cpu(eh->tid_rdma.r_rsp.kdeth0),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, KVER),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, SH),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, INTR),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, TIDCTRL),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, TID),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, OFFSET),
+				 le32_to_cpu(eh->tid_rdma.r_rsp.kdeth1),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth1, JKEY),
+				 be32_to_cpu(eh->tid_rdma.r_rsp.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.r_rsp.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.r_rsp.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.r_rsp.verbs_qp));
+		break;
+	case OP(TID_RDMA, ACK):
+		trace_seq_printf(p, TID_RDMA_KDETH " " AETH_PRN " "
+				 TID_ACK_PRN,
+				 le32_to_cpu(eh->tid_rdma.ack.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.ack.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.ack.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.ack.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.ack.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.ack.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.ack.verbs_psn),
+				 be32_to_cpu(eh->tid_rdma.ack.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.ack.verbs_qp));
+		break;
+	case OP(TID_RDMA, RESYNC):
+		trace_seq_printf(p, TID_RDMA_KDETH " " TID_RESYNC_PRN,
+				 le32_to_cpu(eh->tid_rdma.resync.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.resync.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.resync.verbs_qp));
+		break;
 	/* aeth + atomicacketh */
 	case OP(RC, ATOMIC_ACKNOWLEDGE):
 		trace_seq_printf(p, AETH_PRN " " ATOMICACKETH_PRN,
@@ -394,6 +497,21 @@ const char *print_u32_array(
 	return ret;
 }
 
+u8 hfi1_trace_get_tid_ctrl(u32 ent)
+{
+	return EXP_TID_GET(ent, CTRL);
+}
+
+u16 hfi1_trace_get_tid_len(u32 ent)
+{
+	return EXP_TID_GET(ent, LEN);
+}
+
+u16 hfi1_trace_get_tid_idx(u32 ent)
+{
+	return EXP_TID_GET(ent, IDX);
+}
+
 __hfi1_trace_fn(AFFINITY);
 __hfi1_trace_fn(PKT);
 __hfi1_trace_fn(PROC);

drivers/infiniband/hw/hfi1/trace.h

@@ -63,3 +63,4 @@ __print_symbolic(etype,                         \
 #include "trace_tx.h"
 #include "trace_mmu.h"
 #include "trace_iowait.h"
+#include "trace_tid.h"

drivers/infiniband/hw/hfi1/trace_ibhdrs.h

@@ -79,6 +79,14 @@ __print_symbolic(opcode,                                   \
 	ib_opcode_name(RC_ATOMIC_ACKNOWLEDGE),             \
 	ib_opcode_name(RC_COMPARE_SWAP),                   \
 	ib_opcode_name(RC_FETCH_ADD),                      \
+	ib_opcode_name(TID_RDMA_WRITE_REQ),	           \
+	ib_opcode_name(TID_RDMA_WRITE_RESP),	           \
+	ib_opcode_name(TID_RDMA_WRITE_DATA),	           \
+	ib_opcode_name(TID_RDMA_WRITE_DATA_LAST),          \
+	ib_opcode_name(TID_RDMA_READ_REQ),	           \
+	ib_opcode_name(TID_RDMA_READ_RESP),	           \
+	ib_opcode_name(TID_RDMA_RESYNC),	           \
+	ib_opcode_name(TID_RDMA_ACK),                      \
 	ib_opcode_name(UC_SEND_FIRST),                     \
 	ib_opcode_name(UC_SEND_MIDDLE),                    \
 	ib_opcode_name(UC_SEND_LAST),                      \

drivers/infiniband/hw/hfi1/trace_rc.h

@@ -109,6 +109,54 @@ DEFINE_EVENT(hfi1_rc_template, hfi1_rcv_error,
 	     TP_ARGS(qp, psn)
 );
 
+DEFINE_EVENT(/* event */
+	hfi1_rc_template, hfi1_rc_completion,
+	TP_PROTO(struct rvt_qp *qp, u32 psn),
+	TP_ARGS(qp, psn)
+);
+
+DECLARE_EVENT_CLASS(/* rc_ack */
+	hfi1_rc_ack_template,
+	TP_PROTO(struct rvt_qp *qp, u32 aeth, u32 psn,
+		 struct rvt_swqe *wqe),
+	TP_ARGS(qp, aeth, psn, wqe),
+	TP_STRUCT__entry(/* entry */
+		DD_DEV_ENTRY(dd_from_ibdev(qp->ibqp.device))
+		__field(u32, qpn)
+		__field(u32, aeth)
+		__field(u32, psn)
+		__field(u8, opcode)
+		__field(u32, spsn)
+		__field(u32, lpsn)
+	),
+	TP_fast_assign(/* assign */
+		DD_DEV_ASSIGN(dd_from_ibdev(qp->ibqp.device))
+		__entry->qpn = qp->ibqp.qp_num;
+		__entry->aeth = aeth;
+		__entry->psn = psn;
+		__entry->opcode = wqe->wr.opcode;
+		__entry->spsn = wqe->psn;
+		__entry->lpsn = wqe->lpsn;
+	),
+	TP_printk(/* print */
+		"[%s] qpn 0x%x aeth 0x%x psn 0x%x opcode 0x%x spsn 0x%x lpsn 0x%x",
+		__get_str(dev),
+		__entry->qpn,
+		__entry->aeth,
+		__entry->psn,
+		__entry->opcode,
+		__entry->spsn,
+		__entry->lpsn
+	)
+);
+
+DEFINE_EVENT(/* do_rc_ack */
+	hfi1_rc_ack_template, hfi1_rc_ack_do,
+	TP_PROTO(struct rvt_qp *qp, u32 aeth, u32 psn,
+		 struct rvt_swqe *wqe),
+	TP_ARGS(qp, aeth, psn, wqe)
+);
+
 #endif /* __HFI1_TRACE_RC_H */
 
 #undef TRACE_INCLUDE_PATH

drivers/infiniband/hw/hfi1/trace_rx.h

 /*
- * Copyright(c) 2015 - 2017 Intel Corporation.
+ * Copyright(c) 2015 - 2018 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -128,111 +128,6 @@ TRACE_EVENT(hfi1_receive_interrupt,
 		      )
 );
 
-DECLARE_EVENT_CLASS(
-	    hfi1_exp_tid_reg_unreg,
-	    TP_PROTO(unsigned int ctxt, u16 subctxt, u32 rarr,
-		     u32 npages, unsigned long va, unsigned long pa,
-		     dma_addr_t dma),
-	    TP_ARGS(ctxt, subctxt, rarr, npages, va, pa, dma),
-	    TP_STRUCT__entry(
-			     __field(unsigned int, ctxt)
-			     __field(u16, subctxt)
-			     __field(u32, rarr)
-			     __field(u32, npages)
-			     __field(unsigned long, va)
-			     __field(unsigned long, pa)
-			     __field(dma_addr_t, dma)
-			     ),
-	    TP_fast_assign(
-			   __entry->ctxt = ctxt;
-			   __entry->subctxt = subctxt;
-			   __entry->rarr = rarr;
-			   __entry->npages = npages;
-			   __entry->va = va;
-			   __entry->pa = pa;
-			   __entry->dma = dma;
-			   ),
-	    TP_printk("[%u:%u] entry:%u, %u pages @ 0x%lx, va:0x%lx dma:0x%llx",
-		      __entry->ctxt,
-		      __entry->subctxt,
-		      __entry->rarr,
-		      __entry->npages,
-		      __entry->pa,
-		      __entry->va,
-		      __entry->dma
-		      )
-	);
-
-DEFINE_EVENT(
-	hfi1_exp_tid_reg_unreg, hfi1_exp_tid_unreg,
-	TP_PROTO(unsigned int ctxt, u16 subctxt, u32 rarr, u32 npages,
-		 unsigned long va, unsigned long pa, dma_addr_t dma),
-	TP_ARGS(ctxt, subctxt, rarr, npages, va, pa, dma));
-
-DEFINE_EVENT(
-	hfi1_exp_tid_reg_unreg, hfi1_exp_tid_reg,
-	TP_PROTO(unsigned int ctxt, u16 subctxt, u32 rarr, u32 npages,
-		 unsigned long va, unsigned long pa, dma_addr_t dma),
-	TP_ARGS(ctxt, subctxt, rarr, npages, va, pa, dma));
-
-TRACE_EVENT(
-	hfi1_put_tid,
-	TP_PROTO(struct hfi1_devdata *dd,
-		 u32 index, u32 type, unsigned long pa, u16 order),
-	TP_ARGS(dd, index, type, pa, order),
-	TP_STRUCT__entry(
-		DD_DEV_ENTRY(dd)
-		__field(unsigned long, pa);
-		__field(u32, index);
-		__field(u32, type);
-		__field(u16, order);
-	),
-	TP_fast_assign(
-		DD_DEV_ASSIGN(dd);
-		__entry->pa = pa;
-		__entry->index = index;
-		__entry->type = type;
-		__entry->order = order;
-	),
-	TP_printk("[%s] type %s pa %lx index %u order %u",
-		  __get_str(dev),
-		  show_tidtype(__entry->type),
-		  __entry->pa,
-		  __entry->index,
-		  __entry->order
-	)
-);
-
-TRACE_EVENT(hfi1_exp_tid_inval,
-	    TP_PROTO(unsigned int ctxt, u16 subctxt, unsigned long va, u32 rarr,
-		     u32 npages, dma_addr_t dma),
-	    TP_ARGS(ctxt, subctxt, va, rarr, npages, dma),
-	    TP_STRUCT__entry(
-			     __field(unsigned int, ctxt)
-			     __field(u16, subctxt)
-			     __field(unsigned long, va)
-			     __field(u32, rarr)
-			     __field(u32, npages)
-			     __field(dma_addr_t, dma)
-			     ),
-	    TP_fast_assign(
-			   __entry->ctxt = ctxt;
-			   __entry->subctxt = subctxt;
-			   __entry->va = va;
-			   __entry->rarr = rarr;
-			   __entry->npages = npages;
-			   __entry->dma = dma;
-			  ),
-	    TP_printk("[%u:%u] entry:%u, %u pages @ 0x%lx dma: 0x%llx",
-		      __entry->ctxt,
-		      __entry->subctxt,
-		      __entry->rarr,
-		      __entry->npages,
-		      __entry->va,
-		      __entry->dma
-		      )
-	    );
-
 TRACE_EVENT(hfi1_mmu_invalidate,
 	    TP_PROTO(unsigned int ctxt, u16 subctxt, const char *type,
 		     unsigned long start, unsigned long end),

drivers/infiniband/hw/hfi1/trace_tx.h

@@ -114,19 +114,27 @@ DECLARE_EVENT_CLASS(hfi1_qpsleepwakeup_template,
 		    __field(u32, qpn)
 		    __field(u32, flags)
 		    __field(u32, s_flags)
+		    __field(u32, ps_flags)
+		    __field(unsigned long, iow_flags)
 		    ),
 		    TP_fast_assign(
 		    DD_DEV_ASSIGN(dd_from_ibdev(qp->ibqp.device))
 		    __entry->flags = flags;
 		    __entry->qpn = qp->ibqp.qp_num;
 		    __entry->s_flags = qp->s_flags;
+		    __entry->ps_flags =
+			((struct hfi1_qp_priv *)qp->priv)->s_flags;
+		    __entry->iow_flags =
+			((struct hfi1_qp_priv *)qp->priv)->s_iowait.flags;
 		    ),
 		    TP_printk(
-		    "[%s] qpn 0x%x flags 0x%x s_flags 0x%x",
+		    "[%s] qpn 0x%x flags 0x%x s_flags 0x%x ps_flags 0x%x iow_flags 0x%lx",
 		    __get_str(dev),
 		    __entry->qpn,
 		    __entry->flags,
-		    __entry->s_flags
+		    __entry->s_flags,
+		    __entry->ps_flags,
+		    __entry->iow_flags
 		    )
 );
 
@@ -838,6 +846,12 @@ DEFINE_EVENT(
 	TP_ARGS(qp, flag)
 );
 
+DEFINE_EVENT(/* event */
+	hfi1_do_send_template, hfi1_rc_do_tid_send,
+	TP_PROTO(struct rvt_qp *qp, bool flag),
+	TP_ARGS(qp, flag)
+);
+
 DEFINE_EVENT(
 	hfi1_do_send_template, hfi1_rc_expired_time_slice,
 	TP_PROTO(struct rvt_qp *qp, bool flag),

drivers/infiniband/hw/hfi1/uc.c

@@ -271,7 +271,8 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 	ps->s_txreq->ss = &qp->s_sge;
 	ps->s_txreq->s_cur_size = len;
 	hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
-			     mask_psn(qp->s_psn++), middle, ps);
+			     qp->remote_qpn, mask_psn(qp->s_psn++),
+			     middle, ps);
 	return 1;
 
 done_free_tx:

drivers/infiniband/hw/hfi1/user_exp_rcv.h

@@ -48,7 +48,6 @@
  */
 
 #include "hfi.h"
-
 #include "exp_rcv.h"
 
 struct tid_pageset {

drivers/infiniband/hw/hfi1/user_sdma.c

@@ -144,8 +144,10 @@ static int defer_packet_queue(
 	 */
 	xchg(&pq->state, SDMA_PKT_Q_DEFERRED);
 	write_seqlock(&sde->waitlock);
-	if (list_empty(&pq->busy.list))
+	if (list_empty(&pq->busy.list)) {
+		iowait_get_priority(&pq->busy);
 		iowait_queue(pkts_sent, &pq->busy, &sde->dmawait);
+	}
 	write_sequnlock(&sde->waitlock);
 	return -EBUSY;
 eagain:
@@ -191,7 +193,7 @@ int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt,
 	pq->mm = fd->mm;
 
 	iowait_init(&pq->busy, 0, NULL, NULL, defer_packet_queue,
-		    activate_packet_queue, NULL);
+		    activate_packet_queue, NULL, NULL);
 	pq->reqidx = 0;
 
 	pq->reqs = kcalloc(hfi1_sdma_comp_ring_size,
@@ -1126,7 +1128,8 @@ static inline u32 set_pkt_bth_psn(__be32 bthpsn, u8 expct, u32 frags)
 			0xffffffull),
 		psn = val & mask;
 	if (expct)
-		psn = (psn & ~BTH_SEQ_MASK) | ((psn + frags) & BTH_SEQ_MASK);
+		psn = (psn & ~HFI1_KDETH_BTH_SEQ_MASK) |
+			((psn + frags) & HFI1_KDETH_BTH_SEQ_MASK);
 	else
 		psn = psn + frags;
 	return psn & mask;

drivers/infiniband/hw/hfi1/verbs.h

@@ -72,6 +72,7 @@ struct hfi1_packet;
 
 #include "iowait.h"
 #include "tid_rdma.h"
+#include "opfn.h"
 
 #define HFI1_MAX_RDMA_ATOMIC     16
 
@@ -158,10 +159,68 @@ struct hfi1_qp_priv {
 	struct sdma_engine *s_sde;                /* current sde */
 	struct send_context *s_sendcontext;       /* current sendcontext */
 	struct hfi1_ctxtdata *rcd;                /* QP's receive context */
+	struct page **pages;                      /* for TID page scan */
+	u32 tid_enqueue;                          /* saved when tid waited */
 	u8 s_sc;		                  /* SC[0..4] for next packet */
 	struct iowait s_iowait;
+	struct timer_list s_tid_timer;            /* for timing tid wait */
+	struct timer_list s_tid_retry_timer;      /* for timing tid ack */
+	struct list_head tid_wait;                /* for queueing tid space */
+	struct hfi1_opfn_data opfn;
+	struct tid_flow_state flow_state;
+	struct tid_rdma_qp_params tid_rdma;
 	struct rvt_qp *owner;
 	u8 hdr_type; /* 9B or 16B */
+	struct rvt_sge_state tid_ss;       /* SGE state pointer for 2nd leg */
+	atomic_t n_requests;               /* # of TID RDMA requests in the */
+					   /* queue */
+	atomic_t n_tid_requests;            /* # of sent TID RDMA requests */
+	unsigned long tid_timer_timeout_jiffies;
+	unsigned long tid_retry_timeout_jiffies;
+
+	/* variables for the TID RDMA SE state machine */
+	u8 s_state;
+	u8 s_retry;
+	u8 rnr_nak_state;       /* RNR NAK state */
+	u8 s_nak_state;
+	u32 s_nak_psn;
+	u32 s_flags;
+	u32 s_tid_cur;
+	u32 s_tid_head;
+	u32 s_tid_tail;
+	u32 r_tid_head;     /* Most recently added TID RDMA request */
+	u32 r_tid_tail;     /* the last completed TID RDMA request */
+	u32 r_tid_ack;      /* the TID RDMA request to be ACK'ed */
+	u32 r_tid_alloc;    /* Request for which we are allocating resources */
+	u32 pending_tid_w_segs; /* Num of pending tid write segments */
+	u32 pending_tid_w_resp; /* Num of pending tid write responses */
+	u32 alloc_w_segs;       /* Number of segments for which write */
+			       /* resources have been allocated for this QP */
+
+	/* For TID RDMA READ */
+	u32 tid_r_reqs;         /* Num of tid reads requested */
+	u32 tid_r_comp;         /* Num of tid reads completed */
+	u32 pending_tid_r_segs; /* Num of pending tid read segments */
+	u16 pkts_ps;            /* packets per segment */
+	u8 timeout_shift;       /* account for number of packets per segment */
+
+	u32 r_next_psn_kdeth;
+	u32 r_next_psn_kdeth_save;
+	u32 s_resync_psn;
+	u8 sync_pt;           /* Set when QP reaches sync point */
+	u8 resync;
+};
+
+#define HFI1_QP_WQE_INVALID   ((u32)-1)
+
+struct hfi1_swqe_priv {
+	struct tid_rdma_request tid_req;
+	struct rvt_sge_state ss;  /* Used for TID RDMA READ Request */
+};
+
+struct hfi1_ack_priv {
+	struct rvt_sge_state ss;               /* used for TID WRITE RESP */
+	struct tid_rdma_request tid_req;
 };
 
 /*
@@ -225,6 +284,7 @@ struct hfi1_ibdev {
 	struct kmem_cache *verbs_txreq_cache;
 	u64 n_txwait;
 	u64 n_kmem_wait;
+	u64 n_tidwait;
 
 	/* protect iowait lists */
 	seqlock_t iowait_lock ____cacheline_aligned_in_smp;
@@ -312,6 +372,31 @@ static inline u32 delta_psn(u32 a, u32 b)
 	return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
 }
 
+static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
+{
+	return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
+}
+
+static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
+{
+	return &((struct hfi1_ack_priv *)e->priv)->tid_req;
+}
+
+/*
+ * Look through all the active flows for a TID RDMA request and find
+ * the one (if it exists) that contains the specified PSN.
+ */
+static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
+{
+	return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
+			(psn & HFI1_KDETH_BTH_SEQ_MASK));
+}
+
+static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
+{
+	return __full_flow_psn(&flow->flow_state, psn);
+}
+
 struct verbs_txreq;
 void hfi1_put_txreq(struct verbs_txreq *tx);
 
@@ -356,9 +441,12 @@ u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
 		  const struct ib_global_route *grh, u32 hwords, u32 nwords);
 
 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
-			  u32 bth0, u32 bth2, int middle,
+			  u32 bth0, u32 bth1, u32 bth2, int middle,
 			  struct hfi1_pkt_state *ps);
 
+bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+			      bool tid);
+
 void _hfi1_do_send(struct work_struct *work);
 
 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
@@ -377,6 +465,10 @@ int hfi1_register_ib_device(struct hfi1_devdata *);
 
 void hfi1_unregister_ib_device(struct hfi1_devdata *);
 
+void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
+
+void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
+
 void hfi1_ib_rcv(struct hfi1_packet *packet);
 
 void hfi1_16B_rcv(struct hfi1_packet *packet);
@@ -394,6 +486,16 @@ static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
 	return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
 }
 
+void hfi1_wait_kmem(struct rvt_qp *qp);
+
+static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
+					    struct rvt_swqe *wqe,
+					    enum ib_wc_status status)
+{
+	trdma_clean_swqe(qp, wqe);
+	rvt_send_complete(qp, wqe, status);
+}
+
 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
 
 extern const u8 hdr_len_by_opcode[];

drivers/infiniband/hw/hfi1/verbs_txreq.h

@@ -94,6 +94,7 @@ static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
 	tx->txreq.num_desc = 0;
 	/* Set the header type */
 	tx->phdr.hdr.hdr_type = priv->hdr_type;
+	tx->txreq.flags = 0;
 	return tx;
 }
 

drivers/infiniband/hw/hfi1/vnic_sdma.c

@@ -240,8 +240,10 @@ static int hfi1_vnic_sdma_sleep(struct sdma_engine *sde,
 	}
 
 	vnic_sdma->state = HFI1_VNIC_SDMA_Q_DEFERRED;
-	if (list_empty(&vnic_sdma->wait.list))
+	if (list_empty(&vnic_sdma->wait.list)) {
+		iowait_get_priority(wait->iow);
 		iowait_queue(pkts_sent, wait->iow, &sde->dmawait);
+	}
 	write_sequnlock(&sde->waitlock);
 	return -EBUSY;
 }
@@ -281,7 +283,7 @@ void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo)
 
 		iowait_init(&vnic_sdma->wait, 0, NULL, NULL,
 			    hfi1_vnic_sdma_sleep,
-			    hfi1_vnic_sdma_wakeup, NULL);
+			    hfi1_vnic_sdma_wakeup, NULL, NULL);
 		vnic_sdma->sde = &vinfo->dd->per_sdma[i];
 		vnic_sdma->dd = vinfo->dd;
 		vnic_sdma->vinfo = vinfo;

drivers/infiniband/hw/qib/qib_rc.c

@@ -45,12 +45,7 @@ static u32 restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe,
 	u32 len;
 
 	len = ((psn - wqe->psn) & QIB_PSN_MASK) * pmtu;
-	ss->sge = wqe->sg_list[0];
-	ss->sg_list = wqe->sg_list + 1;
-	ss->num_sge = wqe->wr.num_sge;
-	ss->total_len = wqe->length;
-	rvt_skip_sge(ss, len, false);
-	return wqe->length - len;
+	return rvt_restart_sge(ss, wqe, len);
 }
 
 /**

drivers/infiniband/sw/rdmavt/qp.c

@@ -854,6 +854,7 @@ static void rvt_init_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 	qp->s_mig_state = IB_MIG_MIGRATED;
 	qp->r_head_ack_queue = 0;
 	qp->s_tail_ack_queue = 0;
+	qp->s_acked_ack_queue = 0;
 	qp->s_num_rd_atomic = 0;
 	if (qp->r_rq.wq) {
 		qp->r_rq.wq->head = 0;
@@ -1642,11 +1643,11 @@ int rvt_destroy_qp(struct ib_qp *ibqp)
 		kref_put(&qp->ip->ref, rvt_release_mmap_info);
 	else
 		vfree(qp->r_rq.wq);
-	vfree(qp->s_wq);
 	rdi->driver_f.qp_priv_free(rdi, qp);
 	kfree(qp->s_ack_queue);
 	rdma_destroy_ah_attr(&qp->remote_ah_attr);
 	rdma_destroy_ah_attr(&qp->alt_ah_attr);
+	vfree(qp->s_wq);
 	kfree(qp);
 	return 0;
 }
@@ -2393,11 +2394,12 @@ static inline unsigned long rvt_aeth_to_usec(u32 aeth)
 }
 
 /*
- *  rvt_add_retry_timer - add/start a retry timer
+ *  rvt_add_retry_timer_ext - add/start a retry timer
  *  @qp - the QP
+ *  @shift - timeout shift to wait for multiple packets
  *  add a retry timer on the QP
  */
-void rvt_add_retry_timer(struct rvt_qp *qp)
+void rvt_add_retry_timer_ext(struct rvt_qp *qp, u8 shift)
 {
 	struct ib_qp *ibqp = &qp->ibqp;
 	struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
@@ -2405,11 +2407,11 @@ void rvt_add_retry_timer(struct rvt_qp *qp)
 	lockdep_assert_held(&qp->s_lock);
 	qp->s_flags |= RVT_S_TIMER;
        /* 4.096 usec. * (1 << qp->timeout) */
-	qp->s_timer.expires = jiffies + qp->timeout_jiffies +
-			     rdi->busy_jiffies;
+	qp->s_timer.expires = jiffies + rdi->busy_jiffies +
+			      (qp->timeout_jiffies << shift);
 	add_timer(&qp->s_timer);
 }
-EXPORT_SYMBOL(rvt_add_retry_timer);
+EXPORT_SYMBOL(rvt_add_retry_timer_ext);
 
 /**
  * rvt_add_rnr_timer - add/start an rnr timer

drivers/infiniband/sw/rdmavt/rc.c

@@ -187,3 +187,16 @@ void rvt_get_credit(struct rvt_qp *qp, u32 aeth)
 	}
 }
 EXPORT_SYMBOL(rvt_get_credit);
+
+/* rvt_restart_sge - rewind the sge state for a wqe */
+u32 rvt_restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe, u32 len)
+{
+	ss->sge = wqe->sg_list[0];
+	ss->sg_list = wqe->sg_list + 1;
+	ss->num_sge = wqe->wr.num_sge;
+	ss->total_len = wqe->length;
+	rvt_skip_sge(ss, len, false);
+	return wqe->length - len;
+}
+EXPORT_SYMBOL(rvt_restart_sge);
+

include/rdma/ib_hdrs.h

 /*
- * Copyright(c) 2016 Intel Corporation.
+ * Copyright(c) 2016 - 2018 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -100,6 +100,8 @@ struct ib_atomic_eth {
 	__be64 compare_data; /* potentially unaligned */
 } __packed;
 
+#include <rdma/tid_rdma_defs.h>
+
 union ib_ehdrs {
 	struct {
 		__be32 deth[2];
@@ -117,6 +119,16 @@ union ib_ehdrs {
 	__be32 aeth;
 	__be32 ieth;
 	struct ib_atomic_eth atomic_eth;
+	/* TID RDMA headers */
+	union {
+		struct tid_rdma_read_req r_req;
+		struct tid_rdma_read_resp r_rsp;
+		struct tid_rdma_write_req w_req;
+		struct tid_rdma_write_resp w_rsp;
+		struct tid_rdma_write_data w_data;
+		struct tid_rdma_resync resync;
+		struct tid_rdma_ack ack;
+	} tid_rdma;
 }  __packed;
 
 struct ib_other_headers {

include/rdma/rdma_vt.h

@@ -182,6 +182,7 @@ struct rvt_driver_params {
 	u32 max_mad_size;
 	u8 qos_shift;
 	u8 max_rdma_atomic;
+	u8 extra_rdma_atomic;
 	u8 reserved_operations;
 };
 
@@ -519,7 +520,14 @@ static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi)
  */
 static inline unsigned int rvt_max_atomic(struct rvt_dev_info *rdi)
 {
-	return rdi->dparms.max_rdma_atomic + 1;
+	return rdi->dparms.max_rdma_atomic +
+		rdi->dparms.extra_rdma_atomic + 1;
+}
+
+static inline unsigned int rvt_size_atomic(struct rvt_dev_info *rdi)
+{
+	return rdi->dparms.max_rdma_atomic +
+		rdi->dparms.extra_rdma_atomic;
 }
 
 /*
@@ -566,9 +574,10 @@ static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi,
 /**
  * rvt_mod_retry_timer - mod a retry timer
  * @qp - the QP
+ * @shift - timeout shift to wait for multiple packets
  * Modify a potentially already running retry timer
  */
-static inline void rvt_mod_retry_timer(struct rvt_qp *qp)
+static inline void rvt_mod_retry_timer_ext(struct rvt_qp *qp, u8 shift)
 {
 	struct ib_qp *ibqp = &qp->ibqp;
 	struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
@@ -576,8 +585,13 @@ static inline void rvt_mod_retry_timer(struct rvt_qp *qp)
 	lockdep_assert_held(&qp->s_lock);
 	qp->s_flags |= RVT_S_TIMER;
 	/* 4.096 usec. * (1 << qp->timeout) */
-	mod_timer(&qp->s_timer, jiffies + qp->timeout_jiffies +
-		  rdi->busy_jiffies);
+	mod_timer(&qp->s_timer, jiffies + rdi->busy_jiffies +
+		  (qp->timeout_jiffies << shift));
+}
+
+static inline void rvt_mod_retry_timer(struct rvt_qp *qp)
+{
+	return rvt_mod_retry_timer_ext(qp, 0);
 }
 
 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports);

include/rdma/rdmavt_qp.h

@@ -174,6 +174,7 @@ struct rvt_swqe {
 	u32 lpsn;               /* last packet sequence number */
 	u32 ssn;                /* send sequence number */
 	u32 length;             /* total length of data in sg_list */
+	void *priv;             /* driver dependent field */
 	struct rvt_sge sg_list[0];
 };
 
@@ -235,6 +236,7 @@ struct rvt_ack_entry {
 	u32 lpsn;
 	u8 opcode;
 	u8 sent;
+	void *priv;
 };
 
 #define	RC_QP_SCALING_INTERVAL	5
@@ -244,6 +246,7 @@ struct rvt_ack_entry {
 #define RVT_OPERATION_ATOMIC_SGE  0x00000004
 #define RVT_OPERATION_LOCAL       0x00000008
 #define RVT_OPERATION_USE_RESERVE 0x00000010
+#define RVT_OPERATION_IGN_RNR_CNT 0x00000020
 
 #define RVT_OPERATION_MAX (IB_WR_RESERVED10 + 1)
 
@@ -373,6 +376,7 @@ struct rvt_qp {
 	u8 s_rnr_retry;         /* requester RNR retry counter */
 	u8 s_num_rd_atomic;     /* number of RDMA read/atomic pending */
 	u8 s_tail_ack_queue;    /* index into s_ack_queue[] */
+	u8 s_acked_ack_queue;   /* index into s_ack_queue[] */
 
 	struct rvt_sge_state s_ack_rdma_sge;
 	struct timer_list s_timer;
@@ -628,6 +632,16 @@ __be32 rvt_compute_aeth(struct rvt_qp *qp);
  */
 void rvt_get_credit(struct rvt_qp *qp, u32 aeth);
 
+/**
+ * rvt_restart_sge - rewind the sge state for a wqe
+ * @ss: the sge state pointer
+ * @wqe: the wqe to rewind
+ * @len: the data length from the start of the wqe in bytes
+ *
+ * Returns the remaining data length.
+ */
+u32 rvt_restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe, u32 len);
+
 /**
  * @qp - the qp pair
  * @len - the length
@@ -676,7 +690,11 @@ enum hrtimer_restart rvt_rc_rnr_retry(struct hrtimer *t);
 void rvt_add_rnr_timer(struct rvt_qp *qp, u32 aeth);
 void rvt_del_timers_sync(struct rvt_qp *qp);
 void rvt_stop_rc_timers(struct rvt_qp *qp);
-void rvt_add_retry_timer(struct rvt_qp *qp);
+void rvt_add_retry_timer_ext(struct rvt_qp *qp, u8 shift);
+static inline void rvt_add_retry_timer(struct rvt_qp *qp)
+{
+	rvt_add_retry_timer_ext(qp, 0);
+}
 
 void rvt_copy_sge(struct rvt_qp *qp, struct rvt_sge_state *ss,
 		  void *data, u32 length,

include/rdma/tid_rdma_defs.h

+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2018 Intel Corporation.
+ *
+ */
+
+#ifndef TID_RDMA_DEFS_H
+#define TID_RDMA_DEFS_H
+
+#include <rdma/ib_pack.h>
+
+struct tid_rdma_read_req {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	struct ib_reth reth;
+	__be32 tid_flow_psn;
+	__be32 tid_flow_qp;
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_read_resp {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	__be32 aeth;
+	__be32 reserved[4];
+	__be32 verbs_psn;
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_write_req {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	struct ib_reth reth;
+	__be32 reserved[2];
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_write_resp {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	__be32 aeth;
+	__be32 reserved[3];
+	__be32 tid_flow_psn;
+	__be32 tid_flow_qp;
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_write_data {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	__be32 reserved[6];
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_resync {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	__be32 reserved[6];
+	__be32 verbs_qp;
+};
+
+struct tid_rdma_ack {
+	__le32 kdeth0;
+	__le32 kdeth1;
+	__be32 aeth;
+	__be32 reserved[2];
+	__be32 tid_flow_psn;
+	__be32 verbs_psn;
+	__be32 tid_flow_qp;
+	__be32 verbs_qp;
+};
+
+/*
+ * TID RDMA Opcodes
+ */
+#define IB_OPCODE_TID_RDMA 0xe0
+enum {
+	IB_OPCODE_WRITE_REQ       = 0x0,
+	IB_OPCODE_WRITE_RESP      = 0x1,
+	IB_OPCODE_WRITE_DATA      = 0x2,
+	IB_OPCODE_WRITE_DATA_LAST = 0x3,
+	IB_OPCODE_READ_REQ        = 0x4,
+	IB_OPCODE_READ_RESP       = 0x5,
+	IB_OPCODE_RESYNC          = 0x6,
+	IB_OPCODE_ACK             = 0x7,
+
+	IB_OPCODE(TID_RDMA, WRITE_REQ),
+	IB_OPCODE(TID_RDMA, WRITE_RESP),
+	IB_OPCODE(TID_RDMA, WRITE_DATA),
+	IB_OPCODE(TID_RDMA, WRITE_DATA_LAST),
+	IB_OPCODE(TID_RDMA, READ_REQ),
+	IB_OPCODE(TID_RDMA, READ_RESP),
+	IB_OPCODE(TID_RDMA, RESYNC),
+	IB_OPCODE(TID_RDMA, ACK),
+};
+
+#define TID_OP(x) IB_OPCODE_TID_RDMA_##x
+
+/*
+ * Define TID RDMA specific WR opcodes. The ib_wr_opcode
+ * enum already provides some reserved values for use by
+ * low level drivers. Two of those are used but renamed
+ * to be more descriptive.
+ */
+#define IB_WR_TID_RDMA_WRITE IB_WR_RESERVED1
+#define IB_WR_TID_RDMA_READ  IB_WR_RESERVED2
+
+#endif /* TID_RDMA_DEFS_H */