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numam-spdk/lib/nvme/nvme_transport.c
James Bergsten 740b2f5622 nvme: spdk_nvme_ctrlr_get_registers 
This function returns a pointer to the PCIe I/O registers for a controller
or NULL if unsupported for this transport.

Used for PCIe only, other transports return NULL.

Use with caution.

Signed-off-by: James Bergsten <jamesx.bergsten@intel.com>
Change-Id: I849f9de9ad259a65b1eef9c1237345eb7195b9bf
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452927
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
2019-05-09 22:58:05 +00:00

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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
/*
* NVMe transport abstraction
*/
#include "nvme_internal.h"
#ifdef DEBUG
static __attribute__((noreturn)) void
nvme_transport_unknown(enum spdk_nvme_transport_type trtype)
{
SPDK_ERRLOG("Unknown transport %d\n", (int)trtype);
abort();
}
#define TRANSPORT_DEFAULT(trtype) default: nvme_transport_unknown(trtype);
#else
#define TRANSPORT_DEFAULT(trtype)
#endif
#define TRANSPORT_PCIE(func_name, args) case SPDK_NVME_TRANSPORT_PCIE: return nvme_pcie_ ## func_name args;
#define TRANSPORT_FABRICS_TCP(func_name, args) case SPDK_NVME_TRANSPORT_TCP: return nvme_tcp_ ## func_name args;
#ifdef SPDK_CONFIG_RDMA
#define TRANSPORT_FABRICS_RDMA(func_name, args) case SPDK_NVME_TRANSPORT_RDMA: return nvme_rdma_ ## func_name args;
#define TRANSPORT_RDMA_AVAILABLE true
#else
#define TRANSPORT_FABRICS_RDMA(func_name, args) case SPDK_NVME_TRANSPORT_RDMA: SPDK_UNREACHABLE();
#define TRANSPORT_RDMA_AVAILABLE false
#endif
#define TRANSPORT_FABRICS_FC(func_name, args) case SPDK_NVME_TRANSPORT_FC: SPDK_UNREACHABLE();
#define NVME_TRANSPORT_CALL(trtype, func_name, args) \
do { \
switch (trtype) { \
TRANSPORT_PCIE(func_name, args) \
TRANSPORT_FABRICS_RDMA(func_name, args) \
TRANSPORT_FABRICS_FC(func_name, args) \
TRANSPORT_FABRICS_TCP(func_name, args) \
TRANSPORT_DEFAULT(trtype) \
} \
SPDK_UNREACHABLE(); \
} while (0)
bool
spdk_nvme_transport_available(enum spdk_nvme_transport_type trtype)
{
switch (trtype) {
case SPDK_NVME_TRANSPORT_PCIE:
case SPDK_NVME_TRANSPORT_TCP:
return true;
case SPDK_NVME_TRANSPORT_RDMA:
return TRANSPORT_RDMA_AVAILABLE;
case SPDK_NVME_TRANSPORT_FC:
return false;
}
return false;
}
struct spdk_nvme_ctrlr *nvme_transport_ctrlr_construct(const struct spdk_nvme_transport_id *trid,
const struct spdk_nvme_ctrlr_opts *opts,
void *devhandle)
{
NVME_TRANSPORT_CALL(trid->trtype, ctrlr_construct, (trid, opts, devhandle));
}
int
nvme_transport_ctrlr_scan(struct spdk_nvme_probe_ctx *probe_ctx,
bool direct_connect)
{
NVME_TRANSPORT_CALL(probe_ctx->trid.trtype, ctrlr_scan, (probe_ctx, direct_connect));
}
int
nvme_transport_ctrlr_destruct(struct spdk_nvme_ctrlr *ctrlr)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_destruct, (ctrlr));
}
int
nvme_transport_ctrlr_enable(struct spdk_nvme_ctrlr *ctrlr)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_enable, (ctrlr));
}
int
nvme_transport_ctrlr_set_reg_4(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t value)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_set_reg_4, (ctrlr, offset, value));
}
int
nvme_transport_ctrlr_set_reg_8(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t value)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_set_reg_8, (ctrlr, offset, value));
}
int
nvme_transport_ctrlr_get_reg_4(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t *value)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_get_reg_4, (ctrlr, offset, value));
}
int
nvme_transport_ctrlr_get_reg_8(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t *value)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_get_reg_8, (ctrlr, offset, value));
}
uint32_t
nvme_transport_ctrlr_get_max_xfer_size(struct spdk_nvme_ctrlr *ctrlr)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_get_max_xfer_size, (ctrlr));
}
uint16_t
nvme_transport_ctrlr_get_max_sges(struct spdk_nvme_ctrlr *ctrlr)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_get_max_sges, (ctrlr));
}
void *
nvme_transport_ctrlr_alloc_cmb_io_buffer(struct spdk_nvme_ctrlr *ctrlr, size_t size)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_alloc_cmb_io_buffer, (ctrlr, size));
}
int
nvme_transport_ctrlr_free_cmb_io_buffer(struct spdk_nvme_ctrlr *ctrlr, void *buf, size_t size)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_free_cmb_io_buffer, (ctrlr, buf, size));
}
struct spdk_nvme_qpair *
nvme_transport_ctrlr_create_io_qpair(struct spdk_nvme_ctrlr *ctrlr, uint16_t qid,
const struct spdk_nvme_io_qpair_opts *opts)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_create_io_qpair, (ctrlr, qid, opts));
}
int
nvme_transport_ctrlr_delete_io_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_delete_io_qpair, (ctrlr, qpair));
}
int
nvme_transport_ctrlr_reconnect_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_reconnect_qpair, (ctrlr, qpair));
}
volatile struct spdk_nvme_registers *
nvme_transport_ctrlr_get_registers(struct spdk_nvme_ctrlr *ctrlr)
{
NVME_TRANSPORT_CALL(ctrlr->trid.trtype, ctrlr_get_registers, (ctrlr));
}
void
nvme_transport_qpair_abort_reqs(struct spdk_nvme_qpair *qpair, uint32_t dnr)
{
assert(dnr <= 1);
NVME_TRANSPORT_CALL(qpair->trtype, qpair_abort_reqs, (qpair, dnr));
}
int
nvme_transport_qpair_reset(struct spdk_nvme_qpair *qpair)
{
NVME_TRANSPORT_CALL(qpair->trtype, qpair_reset, (qpair));
}
int
nvme_transport_qpair_submit_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req)
{
NVME_TRANSPORT_CALL(qpair->trtype, qpair_submit_request, (qpair, req));
}
int32_t
nvme_transport_qpair_process_completions(struct spdk_nvme_qpair *qpair, uint32_t max_completions)
{
NVME_TRANSPORT_CALL(qpair->trtype, qpair_process_completions, (qpair, max_completions));
}
void
nvme_transport_admin_qpair_abort_aers(struct spdk_nvme_qpair *qpair)
{
NVME_TRANSPORT_CALL(qpair->trtype, admin_qpair_abort_aers, (qpair));
}
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