rdma: Remove nes

This driver was first merged over 10 years ago and has not seen major
activity by the authors in the last 7 years. However, in that time it has
been patched 150 times to adapt it to changing kernel APIs.

Further, the hardware has several issues, like not supporting 64 bit DMA,
that make it rather uninteresting for use with modern systems and RDMA.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

Documentation/ABI/stable/sysfs-class-infiniband

@@ -423,23 +423,6 @@ Description:
 		(e.g. driver restart on the VM which owns the VF).
 
 
-sysfs interface for NetEffect RNIC Low-Level iWARP driver (nes)
----------------------------------------------------------------
-
-What:		/sys/class/infiniband/nesX/hw_rev
-What:		/sys/class/infiniband/nesX/hca_type
-What:		/sys/class/infiniband/nesX/board_id
-Date:		Feb, 2008
-KernelVersion:	v2.6.25
-Contact:	linux-rdma@vger.kernel.org
-Description:
-		hw_rev:		(RO) Hardware revision number
-
-		hca_type:	(RO) Host Channel Adapter type (NEX020)
-
-		board_id:	(RO) Manufacturing board id
-
-
 sysfs interface for Chelsio T4/T5 RDMA driver (cxgb4)
 -----------------------------------------------------
 

MAINTAINERS

@@ -10830,14 +10830,6 @@ F:	driver/net/net_failover.c
 F:	include/net/net_failover.h
 F:	Documentation/networking/net_failover.rst
 
-NETEFFECT IWARP RNIC DRIVER (IW_NES)
-M:	Faisal Latif <faisal.latif@intel.com>
-L:	linux-rdma@vger.kernel.org
-W:	http://www.intel.com/Products/Server/Adapters/Server-Cluster/Server-Cluster-overview.htm
-S:	Supported
-F:	drivers/infiniband/hw/nes/
-F:	include/uapi/rdma/nes-abi.h
-
 NETEM NETWORK EMULATOR
 M:	Stephen Hemminger <stephen@networkplumber.org>
 L:	netem@lists.linux-foundation.org (moderated for non-subscribers)

drivers/infiniband/Kconfig

@@ -86,7 +86,6 @@ source "drivers/infiniband/hw/efa/Kconfig"
 source "drivers/infiniband/hw/i40iw/Kconfig"
 source "drivers/infiniband/hw/mlx4/Kconfig"
 source "drivers/infiniband/hw/mlx5/Kconfig"
-source "drivers/infiniband/hw/nes/Kconfig"
 source "drivers/infiniband/hw/ocrdma/Kconfig"
 source "drivers/infiniband/hw/vmw_pvrdma/Kconfig"
 source "drivers/infiniband/hw/usnic/Kconfig"

drivers/infiniband/hw/Makefile

@@ -7,7 +7,6 @@ obj-$(CONFIG_INFINIBAND_EFA)		+= efa/
 obj-$(CONFIG_INFINIBAND_I40IW)		+= i40iw/
 obj-$(CONFIG_MLX4_INFINIBAND)		+= mlx4/
 obj-$(CONFIG_MLX5_INFINIBAND)		+= mlx5/
-obj-$(CONFIG_INFINIBAND_NES)		+= nes/
 obj-$(CONFIG_INFINIBAND_OCRDMA)		+= ocrdma/
 obj-$(CONFIG_INFINIBAND_VMWARE_PVRDMA)	+= vmw_pvrdma/
 obj-$(CONFIG_INFINIBAND_USNIC)		+= usnic/

drivers/infiniband/hw/nes/Kconfig

-config INFINIBAND_NES
-	tristate "NetEffect RNIC Driver"
-	depends on PCI && INET
-	select LIBCRC32C
-	---help---
-	  This is the RDMA Network Interface Card (RNIC) driver for
-	  NetEffect Ethernet Cluster Server Adapters.
-
-config INFINIBAND_NES_DEBUG
-	bool "Verbose debugging output"
-	depends on INFINIBAND_NES
-	default n
-	---help---
-	  This option enables debug messages from the NetEffect RNIC
-	  driver.  Select this if you are diagnosing a problem.

drivers/infiniband/hw/nes/Makefile

-obj-$(CONFIG_INFINIBAND_NES) += iw_nes.o
-
-iw_nes-objs := nes.o nes_hw.o nes_nic.o nes_utils.o nes_verbs.o nes_cm.o nes_mgt.o

drivers/infiniband/hw/nes/nes_context.h

-/*
- * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#ifndef NES_CONTEXT_H
-#define NES_CONTEXT_H
-
-struct nes_qp_context {
-	__le32   misc;
-	__le32   cqs;
-	__le32   sq_addr_low;
-	__le32   sq_addr_high;
-	__le32   rq_addr_low;
-	__le32   rq_addr_high;
-	__le32   misc2;
-	__le16   tcpPorts[2];
-	__le32   ip0;
-	__le32   ip1;
-	__le32   ip2;
-	__le32   ip3;
-	__le32   mss;
-	__le32   arp_index_vlan;
-	__le32   tcp_state_flow_label;
-	__le32   pd_index_wscale;
-	__le32   keepalive;
-	u32   ts_recent;
-	u32   ts_age;
-	__le32   snd_nxt;
-	__le32   snd_wnd;
-	__le32   rcv_nxt;
-	__le32   rcv_wnd;
-	__le32   snd_max;
-	__le32   snd_una;
-	u32   srtt;
-	__le32   rttvar;
-	__le32   ssthresh;
-	__le32   cwnd;
-	__le32   snd_wl1;
-	__le32   snd_wl2;
-	__le32   max_snd_wnd;
-	__le32   ts_val_delta;
-	u32   retransmit;
-	u32   probe_cnt;
-	u32   hte_index;
-	__le32   q2_addr_low;
-	__le32   q2_addr_high;
-	__le32   ird_index;
-	u32   Rsvd3;
-	__le32   ird_ord_sizes;
-	u32   mrkr_offset;
-	__le32   aeq_token_low;
-	__le32   aeq_token_high;
-};
-
-/* QP Context Misc Field */
-
-#define NES_QPCONTEXT_MISC_IWARP_VER_MASK    0x00000003
-#define NES_QPCONTEXT_MISC_IWARP_VER_SHIFT   0
-#define NES_QPCONTEXT_MISC_EFB_SIZE_MASK     0x000000C0
-#define NES_QPCONTEXT_MISC_EFB_SIZE_SHIFT    6
-#define NES_QPCONTEXT_MISC_RQ_SIZE_MASK      0x00000300
-#define NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT     8
-#define NES_QPCONTEXT_MISC_SQ_SIZE_MASK      0x00000c00
-#define NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT     10
-#define NES_QPCONTEXT_MISC_PCI_FCN_MASK      0x00007000
-#define NES_QPCONTEXT_MISC_PCI_FCN_SHIFT     12
-#define NES_QPCONTEXT_MISC_DUP_ACKS_MASK     0x00070000
-#define NES_QPCONTEXT_MISC_DUP_ACKS_SHIFT    16
-
-enum nes_qp_context_misc_bits {
-	NES_QPCONTEXT_MISC_RX_WQE_SIZE         = 0x00000004,
-	NES_QPCONTEXT_MISC_IPV4                = 0x00000008,
-	NES_QPCONTEXT_MISC_DO_NOT_FRAG         = 0x00000010,
-	NES_QPCONTEXT_MISC_INSERT_VLAN         = 0x00000020,
-	NES_QPCONTEXT_MISC_DROS                = 0x00008000,
-	NES_QPCONTEXT_MISC_WSCALE              = 0x00080000,
-	NES_QPCONTEXT_MISC_KEEPALIVE           = 0x00100000,
-	NES_QPCONTEXT_MISC_TIMESTAMP           = 0x00200000,
-	NES_QPCONTEXT_MISC_SACK                = 0x00400000,
-	NES_QPCONTEXT_MISC_RDMA_WRITE_EN       = 0x00800000,
-	NES_QPCONTEXT_MISC_RDMA_READ_EN        = 0x01000000,
-	NES_QPCONTEXT_MISC_WBIND_EN            = 0x10000000,
-	NES_QPCONTEXT_MISC_FAST_REGISTER_EN    = 0x20000000,
-	NES_QPCONTEXT_MISC_PRIV_EN             = 0x40000000,
-	NES_QPCONTEXT_MISC_NO_NAGLE            = 0x80000000
-};
-
-enum nes_qp_acc_wq_sizes {
-	HCONTEXT_TSA_WQ_SIZE_4 = 0,
-	HCONTEXT_TSA_WQ_SIZE_32 = 1,
-	HCONTEXT_TSA_WQ_SIZE_128 = 2,
-	HCONTEXT_TSA_WQ_SIZE_512 = 3
-};
-
-/* QP Context Misc2 Fields */
-#define NES_QPCONTEXT_MISC2_TTL_MASK            0x000000ff
-#define NES_QPCONTEXT_MISC2_TTL_SHIFT           0
-#define NES_QPCONTEXT_MISC2_HOP_LIMIT_MASK      0x000000ff
-#define NES_QPCONTEXT_MISC2_HOP_LIMIT_SHIFT     0
-#define NES_QPCONTEXT_MISC2_LIMIT_MASK          0x00000300
-#define NES_QPCONTEXT_MISC2_LIMIT_SHIFT         8
-#define NES_QPCONTEXT_MISC2_NIC_INDEX_MASK      0x0000fc00
-#define NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT     10
-#define NES_QPCONTEXT_MISC2_SRC_IP_MASK         0x001f0000
-#define NES_QPCONTEXT_MISC2_SRC_IP_SHIFT        16
-#define NES_QPCONTEXT_MISC2_TOS_MASK            0xff000000
-#define NES_QPCONTEXT_MISC2_TOS_SHIFT           24
-#define NES_QPCONTEXT_MISC2_TRAFFIC_CLASS_MASK  0xff000000
-#define NES_QPCONTEXT_MISC2_TRAFFIC_CLASS_SHIFT 24
-
-/* QP Context Tcp State/Flow Label Fields */
-#define NES_QPCONTEXT_TCPFLOW_FLOW_LABEL_MASK   0x000fffff
-#define NES_QPCONTEXT_TCPFLOW_FLOW_LABEL_SHIFT  0
-#define NES_QPCONTEXT_TCPFLOW_TCP_STATE_MASK    0xf0000000
-#define NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT   28
-
-enum nes_qp_tcp_state {
-	NES_QPCONTEXT_TCPSTATE_CLOSED = 1,
-	NES_QPCONTEXT_TCPSTATE_EST = 5,
-	NES_QPCONTEXT_TCPSTATE_TIME_WAIT = 11,
-};
-
-/* QP Context PD Index/wscale Fields */
-#define NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK  0x0000000f
-#define NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT 0
-#define NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK  0x00000f00
-#define NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT 8
-#define NES_QPCONTEXT_PDWSCALE_PDINDEX_MASK     0xffff0000
-#define NES_QPCONTEXT_PDWSCALE_PDINDEX_SHIFT    16
-
-/* QP Context Keepalive Fields */
-#define NES_QPCONTEXT_KEEPALIVE_DELTA_MASK      0x0000ffff
-#define NES_QPCONTEXT_KEEPALIVE_DELTA_SHIFT     0
-#define NES_QPCONTEXT_KEEPALIVE_PROBE_CNT_MASK  0x00ff0000
-#define NES_QPCONTEXT_KEEPALIVE_PROBE_CNT_SHIFT 16
-#define NES_QPCONTEXT_KEEPALIVE_INTV_MASK       0xff000000
-#define NES_QPCONTEXT_KEEPALIVE_INTV_SHIFT      24
-
-/* QP Context ORD/IRD Fields */
-#define NES_QPCONTEXT_ORDIRD_ORDSIZE_MASK       0x0000007f
-#define NES_QPCONTEXT_ORDIRD_ORDSIZE_SHIFT      0
-#define NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK       0x00030000
-#define NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT      16
-#define NES_QPCONTEXT_ORDIRD_IWARP_MODE_MASK    0x30000000
-#define NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT   28
-
-enum nes_ord_ird_bits {
-	NES_QPCONTEXT_ORDIRD_WRPDU                   = 0x02000000,
-	NES_QPCONTEXT_ORDIRD_LSMM_PRESENT            = 0x04000000,
-	NES_QPCONTEXT_ORDIRD_ALSMM                   = 0x08000000,
-	NES_QPCONTEXT_ORDIRD_AAH                     = 0x40000000,
-	NES_QPCONTEXT_ORDIRD_RNMC                    = 0x80000000
-};
-
-enum nes_iwarp_qp_state {
-	NES_QPCONTEXT_IWARP_STATE_NONEXIST  = 0,
-	NES_QPCONTEXT_IWARP_STATE_IDLE      = 1,
-	NES_QPCONTEXT_IWARP_STATE_RTS       = 2,
-	NES_QPCONTEXT_IWARP_STATE_CLOSING   = 3,
-	NES_QPCONTEXT_IWARP_STATE_TERMINATE = 5,
-	NES_QPCONTEXT_IWARP_STATE_ERROR     = 6
-};
-
-
-#endif		/* NES_CONTEXT_H */

drivers/infiniband/hw/nes/nes_mgt.h

-/*
-* Copyright (c) 2006 - 2011 Intel-NE, Inc.  All rights reserved.
-*
-* This software is available to you under a choice of one of two
-* licenses.  You may choose to be licensed under the terms of the GNU
-* General Public License (GPL) Version 2, available from the file
-* COPYING in the main directory of this source tree, or the
-* OpenIB.org BSD license below:
-*
-*     Redistribution and use in source and binary forms, with or
-*     without modification, are permitted provided that the following
-*     conditions are met:
-*
-*      - Redistributions of source code must retain the above
-*        copyright notice, this list of conditions and the following
-*        disclaimer.
-*
-*      - Redistributions in binary form must reproduce the above
-*        copyright notice, this list of conditions and the following
-*        disclaimer in the documentation and/or other materials
-*        provided with the distribution.
-*
-* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-* SOFTWARE.
-*/
-
-#ifndef __NES_MGT_H
-#define __NES_MGT_H
-
-#define MPA_FRAMING 6	/* length is 2 bytes, crc is 4 bytes */
-
-int nes_init_mgt_qp(struct nes_device *nesdev, struct net_device *netdev, struct nes_vnic *nesvnic);
-void nes_queue_mgt_skbs(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp);
-void nes_destroy_mgt(struct nes_vnic *nesvnic);
-void nes_destroy_pau_qp(struct nes_device *nesdev, struct nes_qp *nesqp);
-
-struct nes_hw_mgt {
-	struct nes_hw_nic_rq_wqe *rq_vbase;	/* virtual address of rq */
-	dma_addr_t rq_pbase;			/* PCI memory for host rings */
-	struct sk_buff *rx_skb[NES_NIC_WQ_SIZE];
-	u16 qp_id;
-	u16 sq_head;
-	u16 rq_head;
-	u16 rq_tail;
-	u16 rq_size;
-	u8 replenishing_rq;
-	u8 reserved;
-	spinlock_t rq_lock;
-};
-
-struct nes_vnic_mgt {
-	struct nes_vnic        *nesvnic;
-	struct nes_hw_mgt      mgt;
-	struct nes_hw_nic_cq   mgt_cq;
-	atomic_t               rx_skbs_needed;
-	struct timer_list      rq_wqes_timer;
-	atomic_t               rx_skb_timer_running;
-};
-
-#define MAX_FPDU_FRAGS 4
-struct pau_fpdu_frag {
-	struct sk_buff         *skb;
-	u64                    physaddr;
-	u32                    frag_len;
-	bool                   cmplt;
-};
-
-struct pau_fpdu_info {
-	struct nes_qp          *nesqp;
-	struct nes_cqp_request *cqp_request;
-	void                   *hdr_vbase;
-	dma_addr_t             hdr_pbase;
-	int                    hdr_len;
-	u16                    data_len;
-	u16                    frag_cnt;
-	struct pau_fpdu_frag   frags[MAX_FPDU_FRAGS];
-};
-
-enum pau_qh_state {
-	PAU_DEL_QH,
-	PAU_ADD_LB_QH,
-	PAU_READY
-};
-
-struct pau_qh_chg {
-	struct nes_device *nesdev;
-	struct nes_vnic *nesvnic;
-	struct nes_qp *nesqp;
-};
-
-#endif          /* __NES_MGT_H */