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linux/drivers/infiniband/hw/ehca/ehca_iverbs.h
Hoang-Nam Nguyen bbdd267ef2 IB/ehca: Add "port connection autodetect mode" 
This patch enhances ehca with a capability to "autodetect" the ports
being connected physically. In order to utilize that function the
module option nr_ports must be set to -1 (default is 2 - two
ports). This feature is experimental and will made the default later.

More detail:

If the user connects only one port to the switch, current code requires
  1) port one to be connected and
  2) module option nr_ports=1 to be given.

If autodetect is enabled, ehca will not wait at creation of the GSI QP
for the respective port to become active. Since firmware does not
accept modify_qp() while the port is down at initialization, we need
to cache all calls to modify_qp() for the SMI/GSI QP and just return a
good return code.

When a port is activated and we get a PORT_ACTIVE event, we replay the
cached modify-qp() parms and re-trigger any posted recv WRs. Only then
do we forward the PORT_ACTIVE event to registered clients.

The result of this autodetect patch is that all ports will be
accessible by the users. Depending on their respective cabling only
those ports that are connected properly will become operable. If a
user tries to modify a regular QP of a non-connected port, modify_qp()
will fail. Furthermore, ibv_devinfo should show the port state
accordingly.

Note that this patch primarily improves the loading behaviour of
ehca. If the cable is removed while the driver is operating and
plugged in again, firmware will handle that properly by sending an
appropriate async event.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:44 -08:00

205 lines
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/*
* IBM eServer eHCA Infiniband device driver for Linux on POWER
*
* Function definitions for internal functions
*
* Authors: Heiko J Schick <schickhj@de.ibm.com>
* Dietmar Decker <ddecker@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_IVERBS_H__
#define __EHCA_IVERBS_H__
#include "ehca_classes.h"
int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props);
int ehca_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props);
int ehca_query_sma_attr(struct ehca_shca *shca, u8 port,
struct ehca_sma_attr *attr);
int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 * pkey);
int ehca_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid);
int ehca_modify_port(struct ib_device *ibdev, u8 port, int port_modify_mask,
struct ib_port_modify *props);
struct ib_pd *ehca_alloc_pd(struct ib_device *device,
struct ib_ucontext *context,
struct ib_udata *udata);
int ehca_dealloc_pd(struct ib_pd *pd);
struct ib_ah *ehca_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
int ehca_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
int ehca_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
int ehca_destroy_ah(struct ib_ah *ah);
struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
struct ib_phys_buf *phys_buf_array,
int num_phys_buf,
int mr_access_flags, u64 *iova_start);
struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt, int mr_access_flags,
struct ib_udata *udata);
int ehca_rereg_phys_mr(struct ib_mr *mr,
int mr_rereg_mask,
struct ib_pd *pd,
struct ib_phys_buf *phys_buf_array,
int num_phys_buf, int mr_access_flags, u64 *iova_start);
int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
int ehca_dereg_mr(struct ib_mr *mr);
struct ib_mw *ehca_alloc_mw(struct ib_pd *pd);
int ehca_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
struct ib_mw_bind *mw_bind);
int ehca_dealloc_mw(struct ib_mw *mw);
struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
int mr_access_flags,
struct ib_fmr_attr *fmr_attr);
int ehca_map_phys_fmr(struct ib_fmr *fmr,
u64 *page_list, int list_len, u64 iova);
int ehca_unmap_fmr(struct list_head *fmr_list);
int ehca_dealloc_fmr(struct ib_fmr *fmr);
enum ehca_eq_type {
EHCA_EQ = 0, /* Event Queue */
EHCA_NEQ /* Notification Event Queue */
};
int ehca_create_eq(struct ehca_shca *shca, struct ehca_eq *eq,
enum ehca_eq_type type, const u32 length);
int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq);
void *ehca_poll_eq(struct ehca_shca *shca, struct ehca_eq *eq);
struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe, int comp_vector,
struct ib_ucontext *context,
struct ib_udata *udata);
int ehca_destroy_cq(struct ib_cq *cq);
int ehca_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata);
int ehca_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
int ehca_peek_cq(struct ib_cq *cq, int wc_cnt);
int ehca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags notify_flags);
struct ib_qp *ehca_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata);
int ehca_destroy_qp(struct ib_qp *qp);
int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
struct ib_udata *udata);
int ehca_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
int ehca_post_send(struct ib_qp *qp, struct ib_send_wr *send_wr,
struct ib_send_wr **bad_send_wr);
int ehca_post_recv(struct ib_qp *qp, struct ib_recv_wr *recv_wr,
struct ib_recv_wr **bad_recv_wr);
int ehca_post_srq_recv(struct ib_srq *srq,
struct ib_recv_wr *recv_wr,
struct ib_recv_wr **bad_recv_wr);
struct ib_srq *ehca_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata);
int ehca_modify_srq(struct ib_srq *srq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
int ehca_destroy_srq(struct ib_srq *srq);
u64 ehca_define_sqp(struct ehca_shca *shca, struct ehca_qp *ibqp,
struct ib_qp_init_attr *qp_init_attr);
int ehca_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
int ehca_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
struct ib_ucontext *ehca_alloc_ucontext(struct ib_device *device,
struct ib_udata *udata);
int ehca_dealloc_ucontext(struct ib_ucontext *context);
int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
void ehca_poll_eqs(unsigned long data);
int ehca_calc_ipd(struct ehca_shca *shca, int port,
enum ib_rate path_rate, u32 *ipd);
#ifdef CONFIG_PPC_64K_PAGES
void *ehca_alloc_fw_ctrlblock(gfp_t flags);
void ehca_free_fw_ctrlblock(void *ptr);
#else
#define ehca_alloc_fw_ctrlblock(flags) ((void *)get_zeroed_page(flags))
#define ehca_free_fw_ctrlblock(ptr) free_page((unsigned long)(ptr))
#endif
void ehca_recover_sqp(struct ib_qp *sqp);
#endif
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