Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull inifiniband/rdma updates from Doug Ledford:
 "This is a fairly sizeable set of changes.  I've put them through a
  decent amount of testing prior to sending the pull request due to
  that.

  There are still a few fixups that I know are coming, but I wanted to
  go ahead and get the big, sizable chunk into your hands sooner rather
  than waiting for those last few fixups.

  Of note is the fact that this creates what is intended to be a
  temporary area in the drivers/staging tree specifically for some
  cleanups and additions that are coming for the RDMA stack.  We
  deprecated two drivers (ipath and amso1100) and are waiting to hear
  back if we can deprecate another one (ehca).  We also put Intel's new
  hfi1 driver into this area because it needs to be refactored and a
  transfer library created out of the factored out code, and then it and
  the qib driver and the soft-roce driver should all be modified to use
  that library.

  I expect drivers/staging/rdma to be around for three or four kernel
  releases and then to go away as all of the work is completed and final
  deletions of deprecated drivers are done.

  Summary of changes for 4.3:

   - Create drivers/staging/rdma
   - Move amso1100 driver to staging/rdma and schedule for deletion
   - Move ipath driver to staging/rdma and schedule for deletion
   - Add hfi1 driver to staging/rdma and set TODO for move to regular
     tree
   - Initial support for namespaces to be used on RDMA devices
   - Add RoCE GID table handling to the RDMA core caching code
   - Infrastructure to support handling of devices with differing read
     and write scatter gather capabilities
   - Various iSER updates
   - Kill off unsafe usage of global mr registrations
   - Update SRP driver
   - Misc  mlx4 driver updates
   - Support for the mr_alloc verb
   - Support for a netlink interface between kernel and user space cache
     daemon to speed path record queries and route resolution
   - Ininitial support for safe hot removal of verbs devices"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (136 commits)
  IB/ipoib: Suppress warning for send only join failures
  IB/ipoib: Clean up send-only multicast joins
  IB/srp: Fix possible protection fault
  IB/core: Move SM class defines from ib_mad.h to ib_smi.h
  IB/core: Remove unnecessary defines from ib_mad.h
  IB/hfi1: Add PSM2 user space header to header_install
  IB/hfi1: Add CSRs for CONFIG_SDMA_VERBOSITY
  mlx5: Fix incorrect wc pkey_index assignment for GSI messages
  IB/mlx5: avoid destroying a NULL mr in reg_user_mr error flow
  IB/uverbs: reject invalid or unknown opcodes
  IB/cxgb4: Fix if statement in pick_local_ip6adddrs
  IB/sa: Fix rdma netlink message flags
  IB/ucma: HW Device hot-removal support
  IB/mlx4_ib: Disassociate support
  IB/uverbs: Enable device removal when there are active user space applications
  IB/uverbs: Explicitly pass ib_dev to uverbs commands
  IB/uverbs: Fix race between ib_uverbs_open and remove_one
  IB/uverbs: Fix reference counting usage of event files
  IB/core: Make ib_dealloc_pd return void
  IB/srp: Create an insecure all physical rkey only if needed
  ...

1 files changed, 116 insertions, 87 deletions

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 43c1cf0..7845fae 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -48,6 +48,7 @@
 #include <linux/rwsem.h>
 #include <linux/scatterlist.h>
 #include <linux/workqueue.h>
+#include <linux/socket.h>
 #include <uapi/linux/if_ether.h>
 
 #include <linux/atomic.h>
@@ -64,6 +65,12 @@ union ib_gid {
 	} global;
 };
 
+extern union ib_gid zgid;
+
+struct ib_gid_attr {
+	struct net_device	*ndev;
+};
+
 enum rdma_node_type {
 	/* IB values map to NodeInfo:NodeType. */
 	RDMA_NODE_IB_CA 	= 1,
@@ -284,7 +291,7 @@ enum ib_port_cap_flags {
 	IB_PORT_BOOT_MGMT_SUP			= 1 << 23,
 	IB_PORT_LINK_LATENCY_SUP		= 1 << 24,
 	IB_PORT_CLIENT_REG_SUP			= 1 << 25,
-	IB_PORT_IP_BASED_GIDS			= 1 << 26
+	IB_PORT_IP_BASED_GIDS			= 1 << 26,
 };
 
 enum ib_port_width {
@@ -556,20 +563,18 @@ __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
  */
 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
 
-enum ib_mr_create_flags {
-	IB_MR_SIGNATURE_EN = 1,
-};
 
 /**
- * ib_mr_init_attr - Memory region init attributes passed to routine
- *     ib_create_mr.
- * @max_reg_descriptors: max number of registration descriptors that
- *     may be used with registration work requests.
- * @flags: MR creation flags bit mask.
+ * enum ib_mr_type - memory region type
+ * @IB_MR_TYPE_MEM_REG:       memory region that is used for
+ *                            normal registration
+ * @IB_MR_TYPE_SIGNATURE:     memory region that is used for
+ *                            signature operations (data-integrity
+ *                            capable regions)
  */
-struct ib_mr_init_attr {
-	int	    max_reg_descriptors;
-	u32	    flags;
+enum ib_mr_type {
+	IB_MR_TYPE_MEM_REG,
+	IB_MR_TYPE_SIGNATURE,
 };
 
 /**
@@ -1252,9 +1257,11 @@ struct ib_udata {
 };
 
 struct ib_pd {
+	u32			local_dma_lkey;
 	struct ib_device       *device;
 	struct ib_uobject      *uobject;
 	atomic_t          	usecnt; /* count all resources */
+	struct ib_mr	       *local_mr;
 };
 
 struct ib_xrcd {
@@ -1488,7 +1495,7 @@ struct ib_cache {
 	rwlock_t                lock;
 	struct ib_event_handler event_handler;
 	struct ib_pkey_cache  **pkey_cache;
-	struct ib_gid_cache   **gid_cache;
+	struct ib_gid_table   **gid_cache;
 	u8                     *lmc_cache;
 };
 
@@ -1550,6 +1557,8 @@ struct ib_device {
 
 	spinlock_t                    client_data_lock;
 	struct list_head              core_list;
+	/* Access to the client_data_list is protected by the client_data_lock
+	 * spinlock and the lists_rwsem read-write semaphore */
 	struct list_head              client_data_list;
 
 	struct ib_cache               cache;
@@ -1572,9 +1581,47 @@ struct ib_device {
 						 struct ib_port_attr *port_attr);
 	enum rdma_link_layer	   (*get_link_layer)(struct ib_device *device,
 						     u8 port_num);
+	/* When calling get_netdev, the HW vendor's driver should return the
+	 * net device of device @device at port @port_num or NULL if such
+	 * a net device doesn't exist. The vendor driver should call dev_hold
+	 * on this net device. The HW vendor's device driver must guarantee
+	 * that this function returns NULL before the net device reaches
+	 * NETDEV_UNREGISTER_FINAL state.
+	 */
+	struct net_device	  *(*get_netdev)(struct ib_device *device,
+						 u8 port_num);
 	int		           (*query_gid)(struct ib_device *device,
 						u8 port_num, int index,
 						union ib_gid *gid);
+	/* When calling add_gid, the HW vendor's driver should
+	 * add the gid of device @device at gid index @index of
+	 * port @port_num to be @gid. Meta-info of that gid (for example,
+	 * the network device related to this gid is available
+	 * at @attr. @context allows the HW vendor driver to store extra
+	 * information together with a GID entry. The HW vendor may allocate
+	 * memory to contain this information and store it in @context when a
+	 * new GID entry is written to. Params are consistent until the next
+	 * call of add_gid or delete_gid. The function should return 0 on
+	 * success or error otherwise. The function could be called
+	 * concurrently for different ports. This function is only called
+	 * when roce_gid_table is used.
+	 */
+	int		           (*add_gid)(struct ib_device *device,
+					      u8 port_num,
+					      unsigned int index,
+					      const union ib_gid *gid,
+					      const struct ib_gid_attr *attr,
+					      void **context);
+	/* When calling del_gid, the HW vendor's driver should delete the
+	 * gid of device @device at gid index @index of port @port_num.
+	 * Upon the deletion of a GID entry, the HW vendor must free any
+	 * allocated memory. The caller will clear @context afterwards.
+	 * This function is only called when roce_gid_table is used.
+	 */
+	int		           (*del_gid)(struct ib_device *device,
+					      u8 port_num,
+					      unsigned int index,
+					      void **context);
 	int		           (*query_pkey)(struct ib_device *device,
 						 u8 port_num, u16 index, u16 *pkey);
 	int		           (*modify_device)(struct ib_device *device,
@@ -1668,11 +1715,9 @@ struct ib_device {
 	int                        (*query_mr)(struct ib_mr *mr,
 					       struct ib_mr_attr *mr_attr);
 	int                        (*dereg_mr)(struct ib_mr *mr);
-	int                        (*destroy_mr)(struct ib_mr *mr);
-	struct ib_mr *		   (*create_mr)(struct ib_pd *pd,
-						struct ib_mr_init_attr *mr_init_attr);
-	struct ib_mr *		   (*alloc_fast_reg_mr)(struct ib_pd *pd,
-					       int max_page_list_len);
+	struct ib_mr *		   (*alloc_mr)(struct ib_pd *pd,
+					       enum ib_mr_type mr_type,
+					       u32 max_num_sg);
 	struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
 								   int page_list_len);
 	void			   (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
@@ -1724,6 +1769,7 @@ struct ib_device {
 	int			   (*destroy_flow)(struct ib_flow *flow_id);
 	int			   (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
 						      struct ib_mr_status *mr_status);
+	void			   (*disassociate_ucontext)(struct ib_ucontext *ibcontext);
 
 	struct ib_dma_mapping_ops   *dma_ops;
 
@@ -1761,8 +1807,30 @@ struct ib_device {
 struct ib_client {
 	char  *name;
 	void (*add)   (struct ib_device *);
-	void (*remove)(struct ib_device *);
-
+	void (*remove)(struct ib_device *, void *client_data);
+
+	/* Returns the net_dev belonging to this ib_client and matching the
+	 * given parameters.
+	 * @dev:	 An RDMA device that the net_dev use for communication.
+	 * @port:	 A physical port number on the RDMA device.
+	 * @pkey:	 P_Key that the net_dev uses if applicable.
+	 * @gid:	 A GID that the net_dev uses to communicate.
+	 * @addr:	 An IP address the net_dev is configured with.
+	 * @client_data: The device's client data set by ib_set_client_data().
+	 *
+	 * An ib_client that implements a net_dev on top of RDMA devices
+	 * (such as IP over IB) should implement this callback, allowing the
+	 * rdma_cm module to find the right net_dev for a given request.
+	 *
+	 * The caller is responsible for calling dev_put on the returned
+	 * netdev. */
+	struct net_device *(*get_net_dev_by_params)(
+			struct ib_device *dev,
+			u8 port,
+			u16 pkey,
+			const union ib_gid *gid,
+			const struct sockaddr *addr,
+			void *client_data);
 	struct list_head list;
 };
 
@@ -2071,34 +2139,6 @@ static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
 }
 
 /**
- * rdma_cap_read_multi_sge - Check if the port of device has the capability
- * RDMA Read Multiple Scatter-Gather Entries.
- * @device: Device to check
- * @port_num: Port number to check
- *
- * iWARP has a restriction that RDMA READ requests may only have a single
- * Scatter/Gather Entry (SGE) in the work request.
- *
- * NOTE: although the linux kernel currently assumes all devices are either
- * single SGE RDMA READ devices or identical SGE maximums for RDMA READs and
- * WRITEs, according to Tom Talpey, this is not accurate.  There are some
- * devices out there that support more than a single SGE on RDMA READ
- * requests, but do not support the same number of SGEs as they do on
- * RDMA WRITE requests.  The linux kernel would need rearchitecting to
- * support these imbalanced READ/WRITE SGEs allowed devices.  So, for now,
- * suffice with either the device supports the same READ/WRITE SGEs, or
- * it only gets one READ sge.
- *
- * Return: true for any device that allows more than one SGE in RDMA READ
- * requests.
- */
-static inline bool rdma_cap_read_multi_sge(struct ib_device *device,
-					   u8 port_num)
-{
-	return !(device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP);
-}
-
-/**
  * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
  *
  * @device: Device
@@ -2115,6 +2155,26 @@ static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_n
 	return device->port_immutable[port_num].max_mad_size;
 }
 
+/**
+ * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
+ * @device: Device to check
+ * @port_num: Port number to check
+ *
+ * RoCE GID table mechanism manages the various GIDs for a device.
+ *
+ * NOTE: if allocating the port's GID table has failed, this call will still
+ * return true, but any RoCE GID table API will fail.
+ *
+ * Return: true if the port uses RoCE GID table mechanism in order to manage
+ * its GIDs.
+ */
+static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
+					   u8 port_num)
+{
+	return rdma_protocol_roce(device, port_num) &&
+		device->add_gid && device->del_gid;
+}
+
 int ib_query_gid(struct ib_device *device,
 		 u8 port_num, int index, union ib_gid *gid);
 
@@ -2135,20 +2195,9 @@ int ib_find_gid(struct ib_device *device, union ib_gid *gid,
 int ib_find_pkey(struct ib_device *device,
 		 u8 port_num, u16 pkey, u16 *index);
 
-/**
- * ib_alloc_pd - Allocates an unused protection domain.
- * @device: The device on which to allocate the protection domain.
- *
- * A protection domain object provides an association between QPs, shared
- * receive queues, address handles, memory regions, and memory windows.
- */
 struct ib_pd *ib_alloc_pd(struct ib_device *device);
 
-/**
- * ib_dealloc_pd - Deallocates a protection domain.
- * @pd: The protection domain to deallocate.
- */
-int ib_dealloc_pd(struct ib_pd *pd);
+void ib_dealloc_pd(struct ib_pd *pd);
 
 /**
  * ib_create_ah - Creates an address handle for the given address vector.
@@ -2775,33 +2824,9 @@ int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
  */
 int ib_dereg_mr(struct ib_mr *mr);
 
-
-/**
- * ib_create_mr - Allocates a memory region that may be used for
- *     signature handover operations.
- * @pd: The protection domain associated with the region.
- * @mr_init_attr: memory region init attributes.
- */
-struct ib_mr *ib_create_mr(struct ib_pd *pd,
-			   struct ib_mr_init_attr *mr_init_attr);
-
-/**
- * ib_destroy_mr - Destroys a memory region that was created using
- *     ib_create_mr and removes it from HW translation tables.
- * @mr: The memory region to destroy.
- *
- * This function can fail, if the memory region has memory windows bound to it.
- */
-int ib_destroy_mr(struct ib_mr *mr);
-
-/**
- * ib_alloc_fast_reg_mr - Allocates memory region usable with the
- *   IB_WR_FAST_REG_MR send work request.
- * @pd: The protection domain associated with the region.
- * @max_page_list_len: requested max physical buffer list length to be
- *   used with fast register work requests for this MR.
- */
-struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
+struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
+			  enum ib_mr_type mr_type,
+			  u32 max_num_sg);
 
 /**
  * ib_alloc_fast_reg_page_list - Allocates a page list array
@@ -2994,4 +3019,8 @@ static inline int ib_check_mr_access(int flags)
 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
 		       struct ib_mr_status *mr_status);
 
+struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
+					    u16 pkey, const union ib_gid *gid,
+					    const struct sockaddr *addr);
+
 #endif /* IB_VERBS_H */