Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 619 insertions, 0 deletions

diff --git a/drivers/infiniband/sw/rdmavt/vt.c b/drivers/infiniband/sw/rdmavt/vt.c
new file mode 100644
index 000000000..d61f8de7f
--- /dev/null
+++ b/drivers/infiniband/sw/rdmavt/vt.c
@@ -0,0 +1,619 @@
+// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+/*
+ * Copyright(c) 2016 - 2018 Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include "vt.h"
+#include "cq.h"
+#include "trace.h"
+
+#define RVT_UVERBS_ABI_VERSION 2
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("RDMA Verbs Transport Library");
+
+static int __init rvt_init(void)
+{
+	int ret = rvt_driver_cq_init();
+
+	if (ret)
+		pr_err("Error in driver CQ init.\n");
+
+	return ret;
+}
+module_init(rvt_init);
+
+static void __exit rvt_cleanup(void)
+{
+	rvt_cq_exit();
+}
+module_exit(rvt_cleanup);
+
+/**
+ * rvt_alloc_device - allocate rdi
+ * @size: how big of a structure to allocate
+ * @nports: number of ports to allocate array slots for
+ *
+ * Use IB core device alloc to allocate space for the rdi which is assumed to be
+ * inside of the ib_device. Any extra space that drivers require should be
+ * included in size.
+ *
+ * We also allocate a port array based on the number of ports.
+ *
+ * Return: pointer to allocated rdi
+ */
+struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
+{
+	struct rvt_dev_info *rdi;
+
+	rdi = container_of(_ib_alloc_device(size), struct rvt_dev_info, ibdev);
+	if (!rdi)
+		return rdi;
+
+	rdi->ports = kcalloc(nports, sizeof(*rdi->ports), GFP_KERNEL);
+	if (!rdi->ports)
+		ib_dealloc_device(&rdi->ibdev);
+
+	return rdi;
+}
+EXPORT_SYMBOL(rvt_alloc_device);
+
+/**
+ * rvt_dealloc_device - deallocate rdi
+ * @rdi: structure to free
+ *
+ * Free a structure allocated with rvt_alloc_device()
+ */
+void rvt_dealloc_device(struct rvt_dev_info *rdi)
+{
+	kfree(rdi->ports);
+	ib_dealloc_device(&rdi->ibdev);
+}
+EXPORT_SYMBOL(rvt_dealloc_device);
+
+static int rvt_query_device(struct ib_device *ibdev,
+			    struct ib_device_attr *props,
+			    struct ib_udata *uhw)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+
+	if (uhw->inlen || uhw->outlen)
+		return -EINVAL;
+	/*
+	 * Return rvt_dev_info.dparms.props contents
+	 */
+	*props = rdi->dparms.props;
+	return 0;
+}
+
+static int rvt_get_numa_node(struct ib_device *ibdev)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+
+	return rdi->dparms.node;
+}
+
+static int rvt_modify_device(struct ib_device *device,
+			     int device_modify_mask,
+			     struct ib_device_modify *device_modify)
+{
+	/*
+	 * There is currently no need to supply this based on qib and hfi1.
+	 * Future drivers may need to implement this though.
+	 */
+
+	return -EOPNOTSUPP;
+}
+
+/**
+ * rvt_query_port - Passes the query port call to the driver
+ * @ibdev: Verbs IB dev
+ * @port_num: port number, 1 based from ib core
+ * @props: structure to hold returned properties
+ *
+ * Return: 0 on success
+ */
+static int rvt_query_port(struct ib_device *ibdev, u32 port_num,
+			  struct ib_port_attr *props)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	struct rvt_ibport *rvp;
+	u32 port_index = ibport_num_to_idx(ibdev, port_num);
+
+	rvp = rdi->ports[port_index];
+	/* props being zeroed by the caller, avoid zeroing it here */
+	props->sm_lid = rvp->sm_lid;
+	props->sm_sl = rvp->sm_sl;
+	props->port_cap_flags = rvp->port_cap_flags;
+	props->max_msg_sz = 0x80000000;
+	props->pkey_tbl_len = rvt_get_npkeys(rdi);
+	props->bad_pkey_cntr = rvp->pkey_violations;
+	props->qkey_viol_cntr = rvp->qkey_violations;
+	props->subnet_timeout = rvp->subnet_timeout;
+	props->init_type_reply = 0;
+
+	/* Populate the remaining ib_port_attr elements */
+	return rdi->driver_f.query_port_state(rdi, port_num, props);
+}
+
+/**
+ * rvt_modify_port - modify port
+ * @ibdev: Verbs IB dev
+ * @port_num: Port number, 1 based from ib core
+ * @port_modify_mask: How to change the port
+ * @props: Structure to fill in
+ *
+ * Return: 0 on success
+ */
+static int rvt_modify_port(struct ib_device *ibdev, u32 port_num,
+			   int port_modify_mask, struct ib_port_modify *props)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	struct rvt_ibport *rvp;
+	int ret = 0;
+	u32 port_index = ibport_num_to_idx(ibdev, port_num);
+
+	rvp = rdi->ports[port_index];
+	if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
+		rvp->port_cap3_flags |= props->set_port_cap_mask;
+		rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
+	} else {
+		rvp->port_cap_flags |= props->set_port_cap_mask;
+		rvp->port_cap_flags &= ~props->clr_port_cap_mask;
+	}
+
+	if (props->set_port_cap_mask || props->clr_port_cap_mask)
+		rdi->driver_f.cap_mask_chg(rdi, port_num);
+	if (port_modify_mask & IB_PORT_SHUTDOWN)
+		ret = rdi->driver_f.shut_down_port(rdi, port_num);
+	if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
+		rvp->qkey_violations = 0;
+
+	return ret;
+}
+
+/**
+ * rvt_query_pkey - Return a pkey from the table at a given index
+ * @ibdev: Verbs IB dev
+ * @port_num: Port number, 1 based from ib core
+ * @index: Index into pkey table
+ * @pkey: returned pkey from the port pkey table
+ *
+ * Return: 0 on failure pkey otherwise
+ */
+static int rvt_query_pkey(struct ib_device *ibdev, u32 port_num, u16 index,
+			  u16 *pkey)
+{
+	/*
+	 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to
+	 * date. This function will just return that value. There is no need to
+	 * lock, if a stale value is read and sent to the user so be it there is
+	 * no way to protect against that anyway.
+	 */
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	u32 port_index;
+
+	port_index = ibport_num_to_idx(ibdev, port_num);
+
+	if (index >= rvt_get_npkeys(rdi))
+		return -EINVAL;
+
+	*pkey = rvt_get_pkey(rdi, port_index, index);
+	return 0;
+}
+
+/**
+ * rvt_query_gid - Return a gid from the table
+ * @ibdev: Verbs IB dev
+ * @port_num: Port number, 1 based from ib core
+ * @guid_index: Index in table
+ * @gid: Gid to return
+ *
+ * Return: 0 on success
+ */
+static int rvt_query_gid(struct ib_device *ibdev, u32 port_num,
+			 int guid_index, union ib_gid *gid)
+{
+	struct rvt_dev_info *rdi;
+	struct rvt_ibport *rvp;
+	u32 port_index;
+
+	/*
+	 * Driver is responsible for updating the guid table. Which will be used
+	 * to craft the return value. This will work similar to how query_pkey()
+	 * is being done.
+	 */
+	port_index = ibport_num_to_idx(ibdev, port_num);
+
+	rdi = ib_to_rvt(ibdev);
+	rvp = rdi->ports[port_index];
+
+	gid->global.subnet_prefix = rvp->gid_prefix;
+
+	return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
+					 &gid->global.interface_id);
+}
+
+/**
+ * rvt_alloc_ucontext - Allocate a user context
+ * @uctx: Verbs context
+ * @udata: User data allocated
+ */
+static int rvt_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
+{
+	return 0;
+}
+
+/**
+ * rvt_dealloc_ucontext - Free a user context
+ * @context: Unused
+ */
+static void rvt_dealloc_ucontext(struct ib_ucontext *context)
+{
+	return;
+}
+
+static int rvt_get_port_immutable(struct ib_device *ibdev, u32 port_num,
+				  struct ib_port_immutable *immutable)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	struct ib_port_attr attr;
+	int err;
+
+	immutable->core_cap_flags = rdi->dparms.core_cap_flags;
+
+	err = ib_query_port(ibdev, port_num, &attr);
+	if (err)
+		return err;
+
+	immutable->pkey_tbl_len = attr.pkey_tbl_len;
+	immutable->gid_tbl_len = attr.gid_tbl_len;
+	immutable->max_mad_size = rdi->dparms.max_mad_size;
+
+	return 0;
+}
+
+enum {
+	MISC,
+	QUERY_DEVICE,
+	MODIFY_DEVICE,
+	QUERY_PORT,
+	MODIFY_PORT,
+	QUERY_PKEY,
+	QUERY_GID,
+	ALLOC_UCONTEXT,
+	DEALLOC_UCONTEXT,
+	GET_PORT_IMMUTABLE,
+	CREATE_QP,
+	MODIFY_QP,
+	DESTROY_QP,
+	QUERY_QP,
+	POST_SEND,
+	POST_RECV,
+	POST_SRQ_RECV,
+	CREATE_AH,
+	DESTROY_AH,
+	MODIFY_AH,
+	QUERY_AH,
+	CREATE_SRQ,
+	MODIFY_SRQ,
+	DESTROY_SRQ,
+	QUERY_SRQ,
+	ATTACH_MCAST,
+	DETACH_MCAST,
+	GET_DMA_MR,
+	REG_USER_MR,
+	DEREG_MR,
+	ALLOC_MR,
+	MAP_MR_SG,
+	ALLOC_FMR,
+	MAP_PHYS_FMR,
+	UNMAP_FMR,
+	DEALLOC_FMR,
+	MMAP,
+	CREATE_CQ,
+	DESTROY_CQ,
+	POLL_CQ,
+	REQ_NOTFIY_CQ,
+	RESIZE_CQ,
+	ALLOC_PD,
+	DEALLOC_PD,
+	_VERB_IDX_MAX /* Must always be last! */
+};
+
+static const struct ib_device_ops rvt_dev_ops = {
+	.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION,
+
+	.alloc_mr = rvt_alloc_mr,
+	.alloc_pd = rvt_alloc_pd,
+	.alloc_ucontext = rvt_alloc_ucontext,
+	.attach_mcast = rvt_attach_mcast,
+	.create_ah = rvt_create_ah,
+	.create_cq = rvt_create_cq,
+	.create_qp = rvt_create_qp,
+	.create_srq = rvt_create_srq,
+	.create_user_ah = rvt_create_ah,
+	.dealloc_pd = rvt_dealloc_pd,
+	.dealloc_ucontext = rvt_dealloc_ucontext,
+	.dereg_mr = rvt_dereg_mr,
+	.destroy_ah = rvt_destroy_ah,
+	.destroy_cq = rvt_destroy_cq,
+	.destroy_qp = rvt_destroy_qp,
+	.destroy_srq = rvt_destroy_srq,
+	.detach_mcast = rvt_detach_mcast,
+	.get_dma_mr = rvt_get_dma_mr,
+	.get_numa_node = rvt_get_numa_node,
+	.get_port_immutable = rvt_get_port_immutable,
+	.map_mr_sg = rvt_map_mr_sg,
+	.mmap = rvt_mmap,
+	.modify_ah = rvt_modify_ah,
+	.modify_device = rvt_modify_device,
+	.modify_port = rvt_modify_port,
+	.modify_qp = rvt_modify_qp,
+	.modify_srq = rvt_modify_srq,
+	.poll_cq = rvt_poll_cq,
+	.post_recv = rvt_post_recv,
+	.post_send = rvt_post_send,
+	.post_srq_recv = rvt_post_srq_recv,
+	.query_ah = rvt_query_ah,
+	.query_device = rvt_query_device,
+	.query_gid = rvt_query_gid,
+	.query_pkey = rvt_query_pkey,
+	.query_port = rvt_query_port,
+	.query_qp = rvt_query_qp,
+	.query_srq = rvt_query_srq,
+	.reg_user_mr = rvt_reg_user_mr,
+	.req_notify_cq = rvt_req_notify_cq,
+	.resize_cq = rvt_resize_cq,
+
+	INIT_RDMA_OBJ_SIZE(ib_ah, rvt_ah, ibah),
+	INIT_RDMA_OBJ_SIZE(ib_cq, rvt_cq, ibcq),
+	INIT_RDMA_OBJ_SIZE(ib_pd, rvt_pd, ibpd),
+	INIT_RDMA_OBJ_SIZE(ib_qp, rvt_qp, ibqp),
+	INIT_RDMA_OBJ_SIZE(ib_srq, rvt_srq, ibsrq),
+	INIT_RDMA_OBJ_SIZE(ib_ucontext, rvt_ucontext, ibucontext),
+};
+
+static noinline int check_support(struct rvt_dev_info *rdi, int verb)
+{
+	switch (verb) {
+	case MISC:
+		/*
+		 * These functions are not part of verbs specifically but are
+		 * required for rdmavt to function.
+		 */
+		if ((!rdi->ibdev.ops.port_groups) ||
+		    (!rdi->driver_f.get_pci_dev))
+			return -EINVAL;
+		break;
+
+	case MODIFY_DEVICE:
+		/*
+		 * rdmavt does not support modify device currently drivers must
+		 * provide.
+		 */
+		if (!rdi->ibdev.ops.modify_device)
+			return -EOPNOTSUPP;
+		break;
+
+	case QUERY_PORT:
+		if (!rdi->ibdev.ops.query_port)
+			if (!rdi->driver_f.query_port_state)
+				return -EINVAL;
+		break;
+
+	case MODIFY_PORT:
+		if (!rdi->ibdev.ops.modify_port)
+			if (!rdi->driver_f.cap_mask_chg ||
+			    !rdi->driver_f.shut_down_port)
+				return -EINVAL;
+		break;
+
+	case QUERY_GID:
+		if (!rdi->ibdev.ops.query_gid)
+			if (!rdi->driver_f.get_guid_be)
+				return -EINVAL;
+		break;
+
+	case CREATE_QP:
+		if (!rdi->ibdev.ops.create_qp)
+			if (!rdi->driver_f.qp_priv_alloc ||
+			    !rdi->driver_f.qp_priv_free ||
+			    !rdi->driver_f.notify_qp_reset ||
+			    !rdi->driver_f.flush_qp_waiters ||
+			    !rdi->driver_f.stop_send_queue ||
+			    !rdi->driver_f.quiesce_qp)
+				return -EINVAL;
+		break;
+
+	case MODIFY_QP:
+		if (!rdi->ibdev.ops.modify_qp)
+			if (!rdi->driver_f.notify_qp_reset ||
+			    !rdi->driver_f.schedule_send ||
+			    !rdi->driver_f.get_pmtu_from_attr ||
+			    !rdi->driver_f.flush_qp_waiters ||
+			    !rdi->driver_f.stop_send_queue ||
+			    !rdi->driver_f.quiesce_qp ||
+			    !rdi->driver_f.notify_error_qp ||
+			    !rdi->driver_f.mtu_from_qp ||
+			    !rdi->driver_f.mtu_to_path_mtu)
+				return -EINVAL;
+		break;
+
+	case DESTROY_QP:
+		if (!rdi->ibdev.ops.destroy_qp)
+			if (!rdi->driver_f.qp_priv_free ||
+			    !rdi->driver_f.notify_qp_reset ||
+			    !rdi->driver_f.flush_qp_waiters ||
+			    !rdi->driver_f.stop_send_queue ||
+			    !rdi->driver_f.quiesce_qp)
+				return -EINVAL;
+		break;
+
+	case POST_SEND:
+		if (!rdi->ibdev.ops.post_send)
+			if (!rdi->driver_f.schedule_send ||
+			    !rdi->driver_f.do_send ||
+			    !rdi->post_parms)
+				return -EINVAL;
+		break;
+
+	}
+
+	return 0;
+}
+
+/**
+ * rvt_register_device - register a driver
+ * @rdi: main dev structure for all of rdmavt operations
+ *
+ * It is up to drivers to allocate the rdi and fill in the appropriate
+ * information.
+ *
+ * Return: 0 on success otherwise an errno.
+ */
+int rvt_register_device(struct rvt_dev_info *rdi)
+{
+	int ret = 0, i;
+
+	if (!rdi)
+		return -EINVAL;
+
+	/*
+	 * Check to ensure drivers have setup the required helpers for the verbs
+	 * they want rdmavt to handle
+	 */
+	for (i = 0; i < _VERB_IDX_MAX; i++)
+		if (check_support(rdi, i)) {
+			pr_err("Driver support req not met at %d\n", i);
+			return -EINVAL;
+		}
+
+	ib_set_device_ops(&rdi->ibdev, &rvt_dev_ops);
+
+	/* Once we get past here we can use rvt_pr macros and tracepoints */
+	trace_rvt_dbg(rdi, "Driver attempting registration");
+	rvt_mmap_init(rdi);
+
+	/* Queue Pairs */
+	ret = rvt_driver_qp_init(rdi);
+	if (ret) {
+		pr_err("Error in driver QP init.\n");
+		return -EINVAL;
+	}
+
+	/* Address Handle */
+	spin_lock_init(&rdi->n_ahs_lock);
+	rdi->n_ahs_allocated = 0;
+
+	/* Shared Receive Queue */
+	rvt_driver_srq_init(rdi);
+
+	/* Multicast */
+	rvt_driver_mcast_init(rdi);
+
+	/* Mem Region */
+	ret = rvt_driver_mr_init(rdi);
+	if (ret) {
+		pr_err("Error in driver MR init.\n");
+		goto bail_no_mr;
+	}
+
+	/* Memory Working Set Size */
+	ret = rvt_wss_init(rdi);
+	if (ret) {
+		rvt_pr_err(rdi, "Error in WSS init.\n");
+		goto bail_mr;
+	}
+
+	/* Completion queues */
+	spin_lock_init(&rdi->n_cqs_lock);
+
+	/* Protection Domain */
+	spin_lock_init(&rdi->n_pds_lock);
+	rdi->n_pds_allocated = 0;
+
+	/*
+	 * There are some things which could be set by underlying drivers but
+	 * really should be up to rdmavt to set. For instance drivers can't know
+	 * exactly which functions rdmavt supports, nor do they know the ABI
+	 * version, so we do all of this sort of stuff here.
+	 */
+	rdi->ibdev.uverbs_cmd_mask |=
+		(1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
+		(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
+		(1ull << IB_USER_VERBS_CMD_POST_SEND)           |
+		(1ull << IB_USER_VERBS_CMD_POST_RECV)           |
+		(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
+	rdi->ibdev.node_type = RDMA_NODE_IB_CA;
+	if (!rdi->ibdev.num_comp_vectors)
+		rdi->ibdev.num_comp_vectors = 1;
+
+	/* We are now good to announce we exist */
+	ret = ib_register_device(&rdi->ibdev, dev_name(&rdi->ibdev.dev), NULL);
+	if (ret) {
+		rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
+		goto bail_wss;
+	}
+
+	rvt_create_mad_agents(rdi);
+
+	rvt_pr_info(rdi, "Registration with rdmavt done.\n");
+	return ret;
+
+bail_wss:
+	rvt_wss_exit(rdi);
+bail_mr:
+	rvt_mr_exit(rdi);
+
+bail_no_mr:
+	rvt_qp_exit(rdi);
+
+	return ret;
+}
+EXPORT_SYMBOL(rvt_register_device);
+
+/**
+ * rvt_unregister_device - remove a driver
+ * @rdi: rvt dev struct
+ */
+void rvt_unregister_device(struct rvt_dev_info *rdi)
+{
+	trace_rvt_dbg(rdi, "Driver is unregistering.");
+	if (!rdi)
+		return;
+
+	rvt_free_mad_agents(rdi);
+
+	ib_unregister_device(&rdi->ibdev);
+	rvt_wss_exit(rdi);
+	rvt_mr_exit(rdi);
+	rvt_qp_exit(rdi);
+}
+EXPORT_SYMBOL(rvt_unregister_device);
+
+/**
+ * rvt_init_port - init internal data for driver port
+ * @rdi: rvt_dev_info struct
+ * @port: rvt port
+ * @port_index: 0 based index of ports, different from IB core port num
+ * @pkey_table: pkey_table for @port
+ *
+ * Keep track of a list of ports. No need to have a detach port.
+ * They persist until the driver goes away.
+ *
+ * Return: always 0
+ */
+int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
+		  int port_index, u16 *pkey_table)
+{
+
+	rdi->ports[port_index] = port;
+	rdi->ports[port_index]->pkey_table = pkey_table;
+
+	return 0;
+}
+EXPORT_SYMBOL(rvt_init_port);