IB/ehca: Deprecate driver, move to staging, schedule deletion

The ehca driver is only supported on IBM machines with a custom EBus.
As they have opted to build their newer machines using more industry
standard technology and haven't really been pushing EBus capable
machines for a while, this driver can now safely be moved to the
staging area and scheduled for eventual removal.  This plan was brought
to IBM's attention and received their sign-off.

Cc: alexs@linux.vnet.ibm.com
Cc: hnguyen@de.ibm.com
Cc: raisch@de.ibm.com
Cc: stefan.roscher@de.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 0 insertions, 482 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
deleted file mode 100644
index bd45e0f3923f..000000000000
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ /dev/null
@@ -1,482 +0,0 @@
-/*
- *  IBM eServer eHCA Infiniband device driver for Linux on POWER
- *
- *  Struct definition for eHCA internal structures
- *
- *  Authors: Heiko J Schick <schickhj@de.ibm.com>
- *           Christoph Raisch <raisch@de.ibm.com>
- *           Joachim Fenkes <fenkes@de.ibm.com>
- *
- *  Copyright (c) 2005 IBM Corporation
- *
- *  All rights reserved.
- *
- *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
- *  BSD.
- *
- * OpenIB BSD License
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
- * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __EHCA_CLASSES_H__
-#define __EHCA_CLASSES_H__
-
-struct ehca_module;
-struct ehca_qp;
-struct ehca_cq;
-struct ehca_eq;
-struct ehca_mr;
-struct ehca_mw;
-struct ehca_pd;
-struct ehca_av;
-
-#include <linux/wait.h>
-#include <linux/mutex.h>
-
-#include <rdma/ib_verbs.h>
-#include <rdma/ib_user_verbs.h>
-
-#ifdef CONFIG_PPC64
-#include "ehca_classes_pSeries.h"
-#endif
-#include "ipz_pt_fn.h"
-#include "ehca_qes.h"
-#include "ehca_irq.h"
-
-#define EHCA_EQE_CACHE_SIZE 20
-#define EHCA_MAX_NUM_QUEUES 0xffff
-
-struct ehca_eqe_cache_entry {
-	struct ehca_eqe *eqe;
-	struct ehca_cq *cq;
-};
-
-struct ehca_eq {
-	u32 length;
-	struct ipz_queue ipz_queue;
-	struct ipz_eq_handle ipz_eq_handle;
-	struct work_struct work;
-	struct h_galpas galpas;
-	int is_initialized;
-	struct ehca_pfeq pf;
-	spinlock_t spinlock;
-	struct tasklet_struct interrupt_task;
-	u32 ist;
-	spinlock_t irq_spinlock;
-	struct ehca_eqe_cache_entry eqe_cache[EHCA_EQE_CACHE_SIZE];
-};
-
-struct ehca_sma_attr {
-	u16 lid, lmc, sm_sl, sm_lid;
-	u16 pkey_tbl_len, pkeys[16];
-};
-
-struct ehca_sport {
-	struct ib_cq *ibcq_aqp1;
-	struct ib_qp *ibqp_sqp[2];
-	/* lock to serialze modify_qp() calls for sqp in normal
-	 * and irq path (when event PORT_ACTIVE is received first time)
-	 */
-	spinlock_t mod_sqp_lock;
-	enum ib_port_state port_state;
-	struct ehca_sma_attr saved_attr;
-	u32 pma_qp_nr;
-};
-
-#define HCA_CAP_MR_PGSIZE_4K  0x80000000
-#define HCA_CAP_MR_PGSIZE_64K 0x40000000
-#define HCA_CAP_MR_PGSIZE_1M  0x20000000
-#define HCA_CAP_MR_PGSIZE_16M 0x10000000
-
-struct ehca_shca {
-	struct ib_device ib_device;
-	struct platform_device *ofdev;
-	u8 num_ports;
-	int hw_level;
-	struct list_head shca_list;
-	struct ipz_adapter_handle ipz_hca_handle;
-	struct ehca_sport sport[2];
-	struct ehca_eq eq;
-	struct ehca_eq neq;
-	struct ehca_mr *maxmr;
-	struct ehca_pd *pd;
-	struct h_galpas galpas;
-	struct mutex modify_mutex;
-	u64 hca_cap;
-	/* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
-	u32 hca_cap_mr_pgsize;
-	int max_mtu;
-	int max_num_qps;
-	int max_num_cqs;
-	atomic_t num_cqs;
-	atomic_t num_qps;
-};
-
-struct ehca_pd {
-	struct ib_pd ib_pd;
-	struct ipz_pd fw_pd;
-	/* small queue mgmt */
-	struct mutex lock;
-	struct list_head free[2];
-	struct list_head full[2];
-};
-
-enum ehca_ext_qp_type {
-	EQPT_NORMAL    = 0,
-	EQPT_LLQP      = 1,
-	EQPT_SRQBASE   = 2,
-	EQPT_SRQ       = 3,
-};
-
-/* struct to cache modify_qp()'s parms for GSI/SMI qp */
-struct ehca_mod_qp_parm {
-	int mask;
-	struct ib_qp_attr attr;
-};
-
-#define EHCA_MOD_QP_PARM_MAX 4
-
-#define QMAP_IDX_MASK 0xFFFFULL
-
-/* struct for tracking if cqes have been reported to the application */
-struct ehca_qmap_entry {
-	u16 app_wr_id;
-	u8 reported;
-	u8 cqe_req;
-};
-
-struct ehca_queue_map {
-	struct ehca_qmap_entry *map;
-	unsigned int entries;
-	unsigned int tail;
-	unsigned int left_to_poll;
-	unsigned int next_wqe_idx;   /* Idx to first wqe to be flushed */
-};
-
-/* function to calculate the next index for the qmap */
-static inline unsigned int next_index(unsigned int cur_index, unsigned int limit)
-{
-	unsigned int temp = cur_index + 1;
-	return (temp == limit) ? 0 : temp;
-}
-
-struct ehca_qp {
-	union {
-		struct ib_qp ib_qp;
-		struct ib_srq ib_srq;
-	};
-	u32 qp_type;
-	enum ehca_ext_qp_type ext_type;
-	enum ib_qp_state state;
-	struct ipz_queue ipz_squeue;
-	struct ehca_queue_map sq_map;
-	struct ipz_queue ipz_rqueue;
-	struct ehca_queue_map rq_map;
-	struct h_galpas galpas;
-	u32 qkey;
-	u32 real_qp_num;
-	u32 token;
-	spinlock_t spinlock_s;
-	spinlock_t spinlock_r;
-	u32 sq_max_inline_data_size;
-	struct ipz_qp_handle ipz_qp_handle;
-	struct ehca_pfqp pf;
-	struct ib_qp_init_attr init_attr;
-	struct ehca_cq *send_cq;
-	struct ehca_cq *recv_cq;
-	unsigned int sqerr_purgeflag;
-	struct hlist_node list_entries;
-	/* array to cache modify_qp()'s parms for GSI/SMI qp */
-	struct ehca_mod_qp_parm *mod_qp_parm;
-	int mod_qp_parm_idx;
-	/* mmap counter for resources mapped into user space */
-	u32 mm_count_squeue;
-	u32 mm_count_rqueue;
-	u32 mm_count_galpa;
-	/* unsolicited ack circumvention */
-	int unsol_ack_circ;
-	int mtu_shift;
-	u32 message_count;
-	u32 packet_count;
-	atomic_t nr_events; /* events seen */
-	wait_queue_head_t wait_completion;
-	int mig_armed;
-	struct list_head sq_err_node;
-	struct list_head rq_err_node;
-};
-
-#define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
-#define HAS_SQ(qp) (qp->ext_type != EQPT_SRQ)
-#define HAS_RQ(qp) (qp->ext_type != EQPT_SRQBASE)
-
-/* must be power of 2 */
-#define QP_HASHTAB_LEN 8
-
-struct ehca_cq {
-	struct ib_cq ib_cq;
-	struct ipz_queue ipz_queue;
-	struct h_galpas galpas;
-	spinlock_t spinlock;
-	u32 cq_number;
-	u32 token;
-	u32 nr_of_entries;
-	struct ipz_cq_handle ipz_cq_handle;
-	struct ehca_pfcq pf;
-	spinlock_t cb_lock;
-	struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
-	struct list_head entry;
-	u32 nr_callbacks;   /* #events assigned to cpu by scaling code */
-	atomic_t nr_events; /* #events seen */
-	wait_queue_head_t wait_completion;
-	spinlock_t task_lock;
-	/* mmap counter for resources mapped into user space */
-	u32 mm_count_queue;
-	u32 mm_count_galpa;
-	struct list_head sqp_err_list;
-	struct list_head rqp_err_list;
-};
-
-enum ehca_mr_flag {
-	EHCA_MR_FLAG_FMR = 0x80000000,	 /* FMR, created with ehca_alloc_fmr */
-	EHCA_MR_FLAG_MAXMR = 0x40000000, /* max-MR                           */
-};
-
-struct ehca_mr {
-	union {
-		struct ib_mr ib_mr;	/* must always be first in ehca_mr */
-		struct ib_fmr ib_fmr;	/* must always be first in ehca_mr */
-	} ib;
-	struct ib_umem *umem;
-	spinlock_t mrlock;
-
-	enum ehca_mr_flag flags;
-	u32 num_kpages;		/* number of kernel pages */
-	u32 num_hwpages;	/* number of hw pages to form MR */
-	u64 hwpage_size;	/* hw page size used for this MR */
-	int acl;		/* ACL (stored here for usage in reregister) */
-	u64 *start;		/* virtual start address (stored here for */
-				/* usage in reregister) */
-	u64 size;		/* size (stored here for usage in reregister) */
-	u32 fmr_page_size;	/* page size for FMR */
-	u32 fmr_max_pages;	/* max pages for FMR */
-	u32 fmr_max_maps;	/* max outstanding maps for FMR */
-	u32 fmr_map_cnt;	/* map counter for FMR */
-	/* fw specific data */
-	struct ipz_mrmw_handle ipz_mr_handle;	/* MR handle for h-calls */
-	struct h_galpas galpas;
-};
-
-struct ehca_mw {
-	struct ib_mw ib_mw;	/* gen2 mw, must always be first in ehca_mw */
-	spinlock_t mwlock;
-
-	u8 never_bound;		/* indication MW was never bound */
-	struct ipz_mrmw_handle ipz_mw_handle;	/* MW handle for h-calls */
-	struct h_galpas galpas;
-};
-
-enum ehca_mr_pgi_type {
-	EHCA_MR_PGI_PHYS   = 1,  /* type of ehca_reg_phys_mr,
-				  * ehca_rereg_phys_mr,
-				  * ehca_reg_internal_maxmr */
-	EHCA_MR_PGI_USER   = 2,  /* type of ehca_reg_user_mr */
-	EHCA_MR_PGI_FMR    = 3   /* type of ehca_map_phys_fmr */
-};
-
-struct ehca_mr_pginfo {
-	enum ehca_mr_pgi_type type;
-	u64 num_kpages;
-	u64 kpage_cnt;
-	u64 hwpage_size;     /* hw page size used for this MR */
-	u64 num_hwpages;     /* number of hw pages */
-	u64 hwpage_cnt;      /* counter for hw pages */
-	u64 next_hwpage;     /* next hw page in buffer/chunk/listelem */
-
-	union {
-		struct { /* type EHCA_MR_PGI_PHYS section */
-			int num_phys_buf;
-			struct ib_phys_buf *phys_buf_array;
-			u64 next_buf;
-		} phy;
-		struct { /* type EHCA_MR_PGI_USER section */
-			struct ib_umem *region;
-			struct scatterlist *next_sg;
-			u64 next_nmap;
-		} usr;
-		struct { /* type EHCA_MR_PGI_FMR section */
-			u64 fmr_pgsize;
-			u64 *page_list;
-			u64 next_listelem;
-		} fmr;
-	} u;
-};
-
-/* output parameters for MR/FMR hipz calls */
-struct ehca_mr_hipzout_parms {
-	struct ipz_mrmw_handle handle;
-	u32 lkey;
-	u32 rkey;
-	u64 len;
-	u64 vaddr;
-	u32 acl;
-};
-
-/* output parameters for MW hipz calls */
-struct ehca_mw_hipzout_parms {
-	struct ipz_mrmw_handle handle;
-	u32 rkey;
-};
-
-struct ehca_av {
-	struct ib_ah ib_ah;
-	struct ehca_ud_av av;
-};
-
-struct ehca_ucontext {
-	struct ib_ucontext ib_ucontext;
-};
-
-int ehca_init_pd_cache(void);
-void ehca_cleanup_pd_cache(void);
-int ehca_init_cq_cache(void);
-void ehca_cleanup_cq_cache(void);
-int ehca_init_qp_cache(void);
-void ehca_cleanup_qp_cache(void);
-int ehca_init_av_cache(void);
-void ehca_cleanup_av_cache(void);
-int ehca_init_mrmw_cache(void);
-void ehca_cleanup_mrmw_cache(void);
-int ehca_init_small_qp_cache(void);
-void ehca_cleanup_small_qp_cache(void);
-
-extern rwlock_t ehca_qp_idr_lock;
-extern rwlock_t ehca_cq_idr_lock;
-extern struct idr ehca_qp_idr;
-extern struct idr ehca_cq_idr;
-extern spinlock_t shca_list_lock;
-
-extern int ehca_static_rate;
-extern int ehca_port_act_time;
-extern bool ehca_use_hp_mr;
-extern bool ehca_scaling_code;
-extern int ehca_lock_hcalls;
-extern int ehca_nr_ports;
-extern int ehca_max_cq;
-extern int ehca_max_qp;
-
-struct ipzu_queue_resp {
-	u32 qe_size;      /* queue entry size */
-	u32 act_nr_of_sg;
-	u32 queue_length; /* queue length allocated in bytes */
-	u32 pagesize;
-	u32 toggle_state;
-	u32 offset; /* save offset within a page for small_qp */
-};
-
-struct ehca_create_cq_resp {
-	u32 cq_number;
-	u32 token;
-	struct ipzu_queue_resp ipz_queue;
-	u32 fw_handle_ofs;
-	u32 dummy;
-};
-
-struct ehca_create_qp_resp {
-	u32 qp_num;
-	u32 token;
-	u32 qp_type;
-	u32 ext_type;
-	u32 qkey;
-	/* qp_num assigned by ehca: sqp0/1 may have got different numbers */
-	u32 real_qp_num;
-	u32 fw_handle_ofs;
-	u32 dummy;
-	struct ipzu_queue_resp ipz_squeue;
-	struct ipzu_queue_resp ipz_rqueue;
-};
-
-struct ehca_alloc_cq_parms {
-	u32 nr_cqe;
-	u32 act_nr_of_entries;
-	u32 act_pages;
-	struct ipz_eq_handle eq_handle;
-};
-
-enum ehca_service_type {
-	ST_RC  = 0,
-	ST_UC  = 1,
-	ST_RD  = 2,
-	ST_UD  = 3,
-};
-
-enum ehca_ll_comp_flags {
-	LLQP_SEND_COMP = 0x20,
-	LLQP_RECV_COMP = 0x40,
-	LLQP_COMP_MASK = 0x60,
-};
-
-struct ehca_alloc_queue_parms {
-	/* input parameters */
-	int max_wr;
-	int max_sge;
-	int page_size;
-	int is_small;
-
-	/* output parameters */
-	u16 act_nr_wqes;
-	u8  act_nr_sges;
-	u32 queue_size; /* bytes for small queues, pages otherwise */
-};
-
-struct ehca_alloc_qp_parms {
-	struct ehca_alloc_queue_parms squeue;
-	struct ehca_alloc_queue_parms rqueue;
-
-	/* input parameters */
-	enum ehca_service_type servicetype;
-	int qp_storage;
-	int sigtype;
-	enum ehca_ext_qp_type ext_type;
-	enum ehca_ll_comp_flags ll_comp_flags;
-	int ud_av_l_key_ctl;
-
-	u32 token;
-	struct ipz_eq_handle eq_handle;
-	struct ipz_pd pd;
-	struct ipz_cq_handle send_cq_handle, recv_cq_handle;
-
-	u32 srq_qpn, srq_token, srq_limit;
-
-	/* output parameters */
-	u32 real_qp_num;
-	struct ipz_qp_handle qp_handle;
-	struct h_galpas galpas;
-};
-
-int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp);
-int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int qp_num);
-struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int qp_num);
-
-#endif