From: Mustafa Ismail <redacted>

Register irdma as a platform driver capable of supporting platform
devices from multi-generation RDMA capable Intel HW. Establish the
interface with all supported netdev peer devices and initialize HW.

Signed-off-by: Mustafa Ismail <redacted>
Signed-off-by: Shiraz Saleem <redacted>
Signed-off-by: Jeff Kirsher <redacted>
---
 drivers/infiniband/hw/irdma/i40iw_if.c | 270 +++++++++++
 drivers/infiniband/hw/irdma/irdma_if.c | 436 +++++++++++++++++
 drivers/infiniband/hw/irdma/main.c     | 531 ++++++++++++++++++++
 drivers/infiniband/hw/irdma/main.h     | 639 +++++++++++++++++++++++++
 4 files changed, 1876 insertions(+)
 create mode 100644 drivers/infiniband/hw/irdma/i40iw_if.c
 create mode 100644 drivers/infiniband/hw/irdma/irdma_if.c
 create mode 100644 drivers/infiniband/hw/irdma/main.c
 create mode 100644 drivers/infiniband/hw/irdma/main.h

diff --git a/drivers/infiniband/hw/irdma/i40iw_if.c b/drivers/infiniband/hw/irdma/i40iw_if.c
new file mode 100644
index 000000000000..3cddb091acfb
--- /dev/null
+++ b/drivers/infiniband/hw/irdma/i40iw_if.c

@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
+/* Copyright (c) 2019, Intel Corporation. */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/addrconf.h>
+#include "main.h"
+#include "i40iw_hw.h"
+#include <linux/net/intel/i40e_client.h>
+
+/**
+ * i40iw_request_reset - Request a reset
+ * @rf: RDMA PCI function
+ *
+ */
+void i40iw_request_reset(struct irdma_pci_f *rf)
+{
+	struct i40e_info *ldev = (struct i40e_info *)rf->ldev.if_ldev;
+
+	ldev->ops->request_reset(ldev, rf->ldev.if_client, 1);
+}
+
+/**
+ * i40iw_open - client interface operation open for iwarp/uda device
+ * @ldev: LAN device information
+ * @client: iwarp client information, provided during registration
+ *
+ * Called by the LAN driver during the processing of client register
+ * Create device resources, set up queues, pble and hmc objects and
+ * register the device with the ib verbs interface
+ * Return 0 if successful, otherwise return error
+ */
+static int i40iw_open(struct i40e_info *ldev, struct i40e_client *client)
+{
+	struct irdma_l2params l2params = {};
+	struct irdma_device *iwdev = NULL;
+	struct irdma_handler *hdl = NULL;
+	struct irdma_priv_ldev *pldev;
+	u16 last_qset = IRDMA_NO_QSET;
+	struct irdma_sc_dev *dev;
+	struct irdma_pci_f *rf;
+	int err_code = -EIO;
+	u16 qset;
+	int i;
+
+	hdl = irdma_find_handler(ldev->pcidev);
+	if (hdl)
+		return 0;
+
+	hdl = kzalloc((sizeof(*hdl) + sizeof(*iwdev)), GFP_KERNEL);
+	if (!hdl)
+		return -ENOMEM;
+
+	iwdev = (struct irdma_device *)((u8 *)hdl + sizeof(*hdl));
+
+	iwdev->param_wq = alloc_ordered_workqueue("l2params", WQ_MEM_RECLAIM);
+	if (!iwdev->param_wq)
+		goto error;
+
+	rf = &hdl->rf;
+	rf->hdl = hdl;
+	dev = &rf->sc_dev;
+	dev->back_dev = rf;
+	rf->rdma_ver = IRDMA_GEN_1;
+	hdl->platform_dev = ldev->platform_dev;
+	irdma_init_rf_config_params(rf);
+	rf->init_hw = i40iw_init_hw;
+	rf->hw.hw_addr = ldev->hw_addr;
+	rf->pdev = ldev->pcidev;
+	rf->netdev = ldev->netdev;
+	dev->pci_rev = rf->pdev->revision;
+	iwdev->rf = rf;
+	iwdev->hdl = hdl;
+	iwdev->ldev = &rf->ldev;
+	iwdev->init_state = INITIAL_STATE;
+	iwdev->rcv_wnd = IRDMA_CM_DEFAULT_RCV_WND_SCALED;
+	iwdev->rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
+	iwdev->netdev = ldev->netdev;
+	iwdev->create_ilq = true;
+	iwdev->vsi_num = 0;
+
+	pldev = &rf->ldev;
+	hdl->ldev = pldev;
+	pldev->if_client = client;
+	pldev->if_ldev = ldev;
+	pldev->fn_num = ldev->fid;
+	pldev->ftype = ldev->ftype;
+	pldev->pf_vsi_num = 0;
+	pldev->msix_count = ldev->msix_count;
+	pldev->msix_entries = ldev->msix_entries;
+
+	if (irdma_ctrl_init_hw(rf))
+		goto error;
+
+	l2params.mtu =
+		(ldev->params.mtu) ? ldev->params.mtu : IRDMA_DEFAULT_MTU;
+	for (i = 0; i < I40E_CLIENT_MAX_USER_PRIORITY; i++) {
+		qset = ldev->params.qos.prio_qos[i].qs_handle;
+		l2params.up2tc[i] = ldev->params.qos.prio_qos[i].tc;
+		l2params.qs_handle_list[i] = qset;
+		if (last_qset == IRDMA_NO_QSET)
+			last_qset = qset;
+		else if ((qset != last_qset) && (qset != IRDMA_NO_QSET))
+			iwdev->dcb = true;
+	}
+
+	if (irdma_rt_init_hw(rf, iwdev, &l2params)) {
+		irdma_deinit_ctrl_hw(rf);
+		goto error;
+	}
+
+	irdma_add_handler(hdl);
+	return 0;
+error:
+	kfree(hdl);
+	return err_code;
+}
+
+/**
+ * i40iw_l2params_worker - worker for l2 params change
+ * @work: work pointer for l2 params
+ */
+static void i40iw_l2params_worker(struct work_struct *work)
+{
+	struct l2params_work *dwork =
+		container_of(work, struct l2params_work, work);
+	struct irdma_device *iwdev = dwork->iwdev;
+
+	irdma_change_l2params(&iwdev->vsi, &dwork->l2params);
+	atomic_dec(&iwdev->params_busy);
+	kfree(work);
+}
+
+/**
+ * i40iw_l2param_change - handle qs handles for QoS and MSS change
+ * @ldev: LAN device information
+ * @client: client for parameter change
+ * @params: new parameters from L2
+ */
+static void i40iw_l2param_change(struct i40e_info *ldev,
+				 struct i40e_client *client,
+				 struct i40e_params *params)
+{
+	struct irdma_l2params *l2params;
+	struct l2params_work *work;
+	struct irdma_device *iwdev;
+	struct irdma_handler *hdl;
+	int i;
+
+	hdl = irdma_find_handler(ldev->pcidev);
+	if (!hdl)
+		return;
+
+	iwdev = (struct irdma_device *)((u8 *)hdl + sizeof(*hdl));
+
+	if (atomic_read(&iwdev->params_busy))
+		return;
+	work = kzalloc(sizeof(*work), GFP_KERNEL);
+	if (!work)
+		return;
+
+	atomic_inc(&iwdev->params_busy);