RDMA v6.8 first rc

irdma and bnxt_re fixes:
 
 - Missing error unwind in hf1
 
 - For bnxt - fix fenching behavior to work on new chips, fail unsupported
   SRQ resize back to userspace, propogate SRQ FW failure back to
   userspace.
 
 - Correctly fail unsupported SRQ resize back to userspace in bnxt
 
 - Adjust a memcpy in mlx5 to not overflow a struct field.
 
 - Prevent userspace from triggering mlx5 fw syndrome logging from sysfs
 
 - Use the correct access mode for MLX5_IB_METHOD_DEVX_OBJ_MODIFY to avoid
   a userspace failure on modify
 
 - For irdma - Don't UAF a concurrent tasklet during destroy, prevent
   userspace from issuing invalid QP attrs, fix a possible CQ overflow,
   capture a missing HW async error event
 
 - sendmsg() triggerable memory access crash in hfi1
 
 - Fix the srpt_service_guid parameter to not crash due to missing function
   pointer
 
 - Don't leak objects in error unwind in qedr
 
 - Don't weirdly cast function pointers in srpt
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Mostly irdma and bnxt_re fixes:

   - Missing error unwind in hf1

   - For bnxt - fix fenching behavior to work on new chips, fail
     unsupported SRQ resize back to userspace, propogate SRQ FW failure
     back to userspace.

   - Correctly fail unsupported SRQ resize back to userspace in bnxt

   - Adjust a memcpy in mlx5 to not overflow a struct field.

   - Prevent userspace from triggering mlx5 fw syndrome logging from
     sysfs

   - Use the correct access mode for MLX5_IB_METHOD_DEVX_OBJ_MODIFY to
     avoid a userspace failure on modify

   - For irdma - Don't UAF a concurrent tasklet during destroy, prevent
     userspace from issuing invalid QP attrs, fix a possible CQ
     overflow, capture a missing HW async error event

   - sendmsg() triggerable memory access crash in hfi1

   - Fix the srpt_service_guid parameter to not crash due to missing
     function pointer

   - Don't leak objects in error unwind in qedr

   - Don't weirdly cast function pointers in srpt"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/srpt: fix function pointer cast warnings
  RDMA/qedr: Fix qedr_create_user_qp error flow
  RDMA/srpt: Support specifying the srpt_service_guid parameter
  IB/hfi1: Fix sdma.h tx->num_descs off-by-one error
  RDMA/irdma: Add AE for too many RNRS
  RDMA/irdma: Set the CQ read threshold for GEN 1
  RDMA/irdma: Validate max_send_wr and max_recv_wr
  RDMA/irdma: Fix KASAN issue with tasklet
  RDMA/mlx5: Relax DEVX access upon modify commands
  IB/mlx5: Don't expose debugfs entries for RRoCE general parameters if not supported
  RDMA/mlx5: Fix fortify source warning while accessing Eth segment
  RDMA/bnxt_re: Add a missing check in bnxt_qplib_query_srq
  RDMA/bnxt_re: Return error for SRQ resize
  RDMA/bnxt_re: Fix unconditional fence for newer adapters
  RDMA/bnxt_re: Remove a redundant check inside bnxt_re_vf_res_config
  RDMA/bnxt_re: Avoid creating fence MR for newer adapters
  IB/hfi1: Fix a memleak in init_credit_return

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -401,6 +401,10 @@ static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
 	struct bnxt_re_fence_data *fence = &pd->fence;
 	struct ib_mr *ib_mr = &fence->mr->ib_mr;
 	struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
+	struct bnxt_re_dev *rdev = pd->rdev;
+
+	if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+		return;
 
 	memset(wqe, 0, sizeof(*wqe));
 	wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
@@ -455,6 +459,9 @@ static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
 	struct device *dev = &rdev->en_dev->pdev->dev;
 	struct bnxt_re_mr *mr = fence->mr;
 
+	if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+		return;
+
 	if (fence->mw) {
 		bnxt_re_dealloc_mw(fence->mw);
 		fence->mw = NULL;
@@ -486,6 +493,9 @@ static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
 	struct ib_mw *mw;
 	int rc;
 
+	if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+		return 0;
+
 	dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
 				  DMA_BIDIRECTIONAL);
 	rc = dma_mapping_error(dev, dma_addr);
@@ -1817,7 +1827,7 @@ int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
 	switch (srq_attr_mask) {
 	case IB_SRQ_MAX_WR:
 		/* SRQ resize is not supported */
-		break;
+		return -EINVAL;
 	case IB_SRQ_LIMIT:
 		/* Change the SRQ threshold */
 		if (srq_attr->srq_limit > srq->qplib_srq.max_wqe)
@@ -1832,13 +1842,12 @@ int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
 		/* On success, update the shadow */
 		srq->srq_limit = srq_attr->srq_limit;
 		/* No need to Build and send response back to udata */
-		break;
+		return 0;
 	default:
 		ibdev_err(&rdev->ibdev,
 			  "Unsupported srq_attr_mask 0x%x", srq_attr_mask);
 		return -EINVAL;
 	}
-	return 0;
 }
 
 int bnxt_re_query_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr)
@@ -2556,11 +2565,6 @@ static int bnxt_re_build_inv_wqe(const struct ib_send_wr *wr,
 	wqe->type = BNXT_QPLIB_SWQE_TYPE_LOCAL_INV;
 	wqe->local_inv.inv_l_key = wr->ex.invalidate_rkey;
 
-	/* Need unconditional fence for local invalidate
-	 * opcode to work as expected.
-	 */
-	wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
-
 	if (wr->send_flags & IB_SEND_SIGNALED)
 		wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
 	if (wr->send_flags & IB_SEND_SOLICITED)
@@ -2583,12 +2587,6 @@ static int bnxt_re_build_reg_wqe(const struct ib_reg_wr *wr,
 	wqe->frmr.levels = qplib_frpl->hwq.level;
 	wqe->type = BNXT_QPLIB_SWQE_TYPE_REG_MR;
 
-	/* Need unconditional fence for reg_mr
-	 * opcode to function as expected.
-	 */
-
-	wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
-
 	if (wr->wr.send_flags & IB_SEND_SIGNALED)
 		wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
 
@@ -2719,6 +2717,18 @@ static int bnxt_re_post_send_shadow_qp(struct bnxt_re_dev *rdev,
 	return rc;
 }
 
+static void bnxt_re_legacy_set_uc_fence(struct bnxt_qplib_swqe *wqe)
+{
+	/* Need unconditional fence for non-wire memory opcode
+	 * to work as expected.
+	 */
+	if (wqe->type == BNXT_QPLIB_SWQE_TYPE_LOCAL_INV ||
+	    wqe->type == BNXT_QPLIB_SWQE_TYPE_FAST_REG_MR ||
+	    wqe->type == BNXT_QPLIB_SWQE_TYPE_REG_MR ||
+	    wqe->type == BNXT_QPLIB_SWQE_TYPE_BIND_MW)
+		wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
+}
+
 int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
 		      const struct ib_send_wr **bad_wr)
 {
@@ -2798,8 +2808,11 @@ int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
 			rc = -EINVAL;
 			goto bad;
 		}
-		if (!rc)
+		if (!rc) {
+			if (!bnxt_qplib_is_chip_gen_p5_p7(qp->rdev->chip_ctx))
+				bnxt_re_legacy_set_uc_fence(&wqe);
 			rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
+		}
 bad:
 		if (rc) {
 			ibdev_err(&qp->rdev->ibdev,

drivers/infiniband/hw/bnxt_re/main.c

@@ -280,9 +280,6 @@ static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
 
 static void bnxt_re_vf_res_config(struct bnxt_re_dev *rdev)
 {
-
-	if (test_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags))
-		return;
 	rdev->num_vfs = pci_sriov_get_totalvfs(rdev->en_dev->pdev);
 	if (!bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx)) {
 		bnxt_re_set_resource_limits(rdev);

drivers/infiniband/hw/bnxt_re/qplib_fp.c

@@ -744,7 +744,8 @@ int bnxt_qplib_query_srq(struct bnxt_qplib_res *res,
 	bnxt_qplib_fill_cmdqmsg(&msg, &req, &resp, &sbuf, sizeof(req),
 				sizeof(resp), 0);
 	rc = bnxt_qplib_rcfw_send_message(rcfw, &msg);
-	srq->threshold = le16_to_cpu(sb->srq_limit);
+	if (!rc)
+		srq->threshold = le16_to_cpu(sb->srq_limit);
 	dma_free_coherent(&rcfw->pdev->dev, sbuf.size,
 			  sbuf.sb, sbuf.dma_addr);
 

drivers/infiniband/hw/hfi1/pio.c

@@ -2086,7 +2086,7 @@ int init_credit_return(struct hfi1_devdata *dd)
 				   "Unable to allocate credit return DMA range for NUMA %d\n",
 				   i);
 			ret = -ENOMEM;
-			goto done;
+			goto free_cr_base;
 		}
 	}
 	set_dev_node(&dd->pcidev->dev, dd->node);
@@ -2094,6 +2094,10 @@ int init_credit_return(struct hfi1_devdata *dd)
 	ret = 0;
 done:
 	return ret;
+
+free_cr_base:
+	free_credit_return(dd);
+	goto done;
 }
 
 void free_credit_return(struct hfi1_devdata *dd)

drivers/infiniband/hw/hfi1/sdma.c

@@ -3158,7 +3158,7 @@ int _pad_sdma_tx_descs(struct hfi1_devdata *dd, struct sdma_txreq *tx)
 {
 	int rval = 0;
 
-	if ((unlikely(tx->num_desc + 1 == tx->desc_limit))) {
+	if ((unlikely(tx->num_desc == tx->desc_limit))) {
 		rval = _extend_sdma_tx_descs(dd, tx);
 		if (rval) {
 			__sdma_txclean(dd, tx);

drivers/infiniband/hw/irdma/defs.h

@@ -346,6 +346,7 @@ enum irdma_cqp_op_type {
 #define IRDMA_AE_LLP_TOO_MANY_KEEPALIVE_RETRIES				0x050b
 #define IRDMA_AE_LLP_DOUBT_REACHABILITY					0x050c
 #define IRDMA_AE_LLP_CONNECTION_ESTABLISHED				0x050e
+#define IRDMA_AE_LLP_TOO_MANY_RNRS					0x050f
 #define IRDMA_AE_RESOURCE_EXHAUSTION					0x0520
 #define IRDMA_AE_RESET_SENT						0x0601
 #define IRDMA_AE_TERMINATE_SENT						0x0602

drivers/infiniband/hw/irdma/hw.c

@@ -387,6 +387,7 @@ static void irdma_process_aeq(struct irdma_pci_f *rf)
 		case IRDMA_AE_LLP_TOO_MANY_RETRIES:
 		case IRDMA_AE_LCE_QP_CATASTROPHIC:
 		case IRDMA_AE_LCE_FUNCTION_CATASTROPHIC:
+		case IRDMA_AE_LLP_TOO_MANY_RNRS:
 		case IRDMA_AE_LCE_CQ_CATASTROPHIC:
 		case IRDMA_AE_UDA_XMIT_DGRAM_TOO_LONG:
 		default:
@@ -570,6 +571,13 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf,
 	dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx);
 	irq_update_affinity_hint(msix_vec->irq, NULL);
 	free_irq(msix_vec->irq, dev_id);
+	if (rf == dev_id) {
+		tasklet_kill(&rf->dpc_tasklet);
+	} else {
+		struct irdma_ceq *iwceq = (struct irdma_ceq *)dev_id;
+
+		tasklet_kill(&iwceq->dpc_tasklet);
+	}
 }
 
 /**

drivers/infiniband/hw/irdma/verbs.c

@@ -839,7 +839,9 @@ static int irdma_validate_qp_attrs(struct ib_qp_init_attr *init_attr,
 
 	if (init_attr->cap.max_inline_data > uk_attrs->max_hw_inline ||
 	    init_attr->cap.max_send_sge > uk_attrs->max_hw_wq_frags ||
-	    init_attr->cap.max_recv_sge > uk_attrs->max_hw_wq_frags)
+	    init_attr->cap.max_recv_sge > uk_attrs->max_hw_wq_frags ||
+	    init_attr->cap.max_send_wr > uk_attrs->max_hw_wq_quanta ||
+	    init_attr->cap.max_recv_wr > uk_attrs->max_hw_rq_quanta)
 		return -EINVAL;
 
 	if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
@@ -2184,9 +2186,8 @@ static int irdma_create_cq(struct ib_cq *ibcq,
 		info.cq_base_pa = iwcq->kmem.pa;
 	}
 
-	if (dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
-		info.shadow_read_threshold = min(info.cq_uk_init_info.cq_size / 2,
-						 (u32)IRDMA_MAX_CQ_READ_THRESH);
+	info.shadow_read_threshold = min(info.cq_uk_init_info.cq_size / 2,
+					 (u32)IRDMA_MAX_CQ_READ_THRESH);
 
 	if (irdma_sc_cq_init(cq, &info)) {
 		ibdev_dbg(&iwdev->ibdev, "VERBS: init cq fail\n");

drivers/infiniband/hw/mlx5/cong.c

@@ -458,6 +458,12 @@ void mlx5_ib_init_cong_debugfs(struct mlx5_ib_dev *dev, u32 port_num)
 	dbg_cc_params->root = debugfs_create_dir("cc_params", mlx5_debugfs_get_dev_root(mdev));
 
 	for (i = 0; i < MLX5_IB_DBG_CC_MAX; i++) {
+		if ((i == MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP_VALID ||
+		     i == MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP))
+			if (!MLX5_CAP_GEN(mdev, roce) ||
+			    !MLX5_CAP_ROCE(mdev, roce_cc_general))
+				continue;
+
 		dbg_cc_params->params[i].offset = i;
 		dbg_cc_params->params[i].dev = dev;
 		dbg_cc_params->params[i].port_num = port_num;

drivers/infiniband/hw/mlx5/devx.c

@@ -2949,7 +2949,7 @@ DECLARE_UVERBS_NAMED_METHOD(
 	MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
 	UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE,
 			UVERBS_IDR_ANY_OBJECT,
-			UVERBS_ACCESS_WRITE,
+			UVERBS_ACCESS_READ,
 			UA_MANDATORY),
 	UVERBS_ATTR_PTR_IN(
 		MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,

drivers/infiniband/hw/mlx5/wr.c

@@ -78,7 +78,7 @@ static void set_eth_seg(const struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
 		 */
 		copysz = min_t(u64, *cur_edge - (void *)eseg->inline_hdr.start,
 			       left);
-		memcpy(eseg->inline_hdr.start, pdata, copysz);
+		memcpy(eseg->inline_hdr.data, pdata, copysz);
 		stride = ALIGN(sizeof(struct mlx5_wqe_eth_seg) -
 			       sizeof(eseg->inline_hdr.start) + copysz, 16);
 		*size += stride / 16;

drivers/infiniband/hw/qedr/verbs.c

@@ -1879,8 +1879,17 @@ static int qedr_create_user_qp(struct qedr_dev *dev,
 		/* RQ - read access only (0) */
 		rc = qedr_init_user_queue(udata, dev, &qp->urq, ureq.rq_addr,
 					  ureq.rq_len, true, 0, alloc_and_init);
-		if (rc)
+		if (rc) {
+			ib_umem_release(qp->usq.umem);
+			qp->usq.umem = NULL;
+			if (rdma_protocol_roce(&dev->ibdev, 1)) {
+				qedr_free_pbl(dev, &qp->usq.pbl_info,
+					      qp->usq.pbl_tbl);
+			} else {
+				kfree(qp->usq.pbl_tbl);
+			}
 			return rc;
+		}
 	}
 
 	memset(&in_params, 0, sizeof(in_params));

drivers/infiniband/ulp/srpt/ib_srpt.c

@@ -79,12 +79,16 @@ module_param(srpt_srq_size, int, 0444);
 MODULE_PARM_DESC(srpt_srq_size,
 		 "Shared receive queue (SRQ) size.");
 
+static int srpt_set_u64_x(const char *buffer, const struct kernel_param *kp)
+{
+	return kstrtou64(buffer, 16, (u64 *)kp->arg);
+}
 static int srpt_get_u64_x(char *buffer, const struct kernel_param *kp)
 {
 	return sprintf(buffer, "0x%016llx\n", *(u64 *)kp->arg);
 }
-module_param_call(srpt_service_guid, NULL, srpt_get_u64_x, &srpt_service_guid,
-		  0444);
+module_param_call(srpt_service_guid, srpt_set_u64_x, srpt_get_u64_x,
+		  &srpt_service_guid, 0444);
 MODULE_PARM_DESC(srpt_service_guid,
 		 "Using this value for ioc_guid, id_ext, and cm_listen_id instead of using the node_guid of the first HCA.");
 
@@ -210,10 +214,12 @@ static const char *get_ch_state_name(enum rdma_ch_state s)
 /**
  * srpt_qp_event - QP event callback function
  * @event: Description of the event that occurred.
- * @ch: SRPT RDMA channel.
+ * @ptr: SRPT RDMA channel.
  */
-static void srpt_qp_event(struct ib_event *event, struct srpt_rdma_ch *ch)
+static void srpt_qp_event(struct ib_event *event, void *ptr)
 {
+	struct srpt_rdma_ch *ch = ptr;
+
 	pr_debug("QP event %d on ch=%p sess_name=%s-%d state=%s\n",
 		 event->event, ch, ch->sess_name, ch->qp->qp_num,
 		 get_ch_state_name(ch->state));
@@ -1807,8 +1813,7 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch)
 	ch->cq_size = ch->rq_size + sq_size;
 
 	qp_init->qp_context = (void *)ch;
-	qp_init->event_handler
-		= (void(*)(struct ib_event *, void*))srpt_qp_event;
+	qp_init->event_handler = srpt_qp_event;
 	qp_init->send_cq = ch->cq;
 	qp_init->recv_cq = ch->cq;
 	qp_init->sq_sig_type = IB_SIGNAL_REQ_WR;

include/linux/mlx5/mlx5_ifc.h

@@ -1103,7 +1103,7 @@ struct mlx5_ifc_roce_cap_bits {
 	u8         sw_r_roce_src_udp_port[0x1];
 	u8         fl_rc_qp_when_roce_disabled[0x1];
 	u8         fl_rc_qp_when_roce_enabled[0x1];
-	u8         reserved_at_7[0x1];
+	u8         roce_cc_general[0x1];
 	u8	   qp_ooo_transmit_default[0x1];
 	u8         reserved_at_9[0x15];
 	u8	   qp_ts_format[0x2];

include/linux/mlx5/qp.h

@@ -269,7 +269,10 @@ struct mlx5_wqe_eth_seg {
 	union {
 		struct {
 			__be16 sz;
-			u8     start[2];
+			union {
+				u8     start[2];
+				DECLARE_FLEX_ARRAY(u8, data);
+			};
 		} inline_hdr;
 		struct {
 			__be16 type;