ehca_main.c

linux内核源码

/*
 *  IBM eServer eHCA Infiniband device driver for Linux on POWER
 *
 *  module start stop, hca detection
 *
 *  Authors: Heiko J Schick <[e-mail]>
 *           Hoang-Nam Nguyen <[e-mail]>
 *           Joachim Fenkes <[e-mail]>
 *
 *  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.
 */

#ifdef CONFIG_PPC_64K_PAGES
#include <linux/slab.h>
#endif

#include "ehca_classes.h"
#include "ehca_iverbs.h"
#include "ehca_mrmw.h"
#include "ehca_tools.h"
#include "hcp_if.h"

#define HCAD_VERSION "0025"

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Christoph Raisch <[e-mail]>");
MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
MODULE_VERSION(HCAD_VERSION);

int ehca_open_aqp1     = 0;
int ehca_debug_level   = 0;
int ehca_hw_level      = 0;
int ehca_nr_ports      = 2;
int ehca_use_hp_mr     = 0;
int ehca_port_act_time = 30;
int ehca_poll_all_eqs  = 1;
int ehca_static_rate   = -1;
int ehca_scaling_code  = 0;
int ehca_mr_largepage  = 1;
int ehca_lock_hcalls   = -1;

module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);

MODULE_PARM_DESC(open_aqp1,
		 "AQP1 on startup (0: no (default), 1: yes)");
MODULE_PARM_DESC(debug_level,
		 "debug level"
		 " (0: no debug traces (default), 1: with debug traces)");
MODULE_PARM_DESC(hw_level,
		 "hardware level"
		 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
MODULE_PARM_DESC(nr_ports,
		 "number of connected ports (default: 2)");
MODULE_PARM_DESC(use_hp_mr,
		 "high performance MRs (0: no (default), 1: yes)");
MODULE_PARM_DESC(port_act_time,
		 "time to wait for port activation (default: 30 sec)");
MODULE_PARM_DESC(poll_all_eqs,
		 "polls all event queues periodically"
		 " (0: no, 1: yes (default))");
MODULE_PARM_DESC(static_rate,
		 "set permanent static rate (default: disabled)");
MODULE_PARM_DESC(scaling_code,
		 "set scaling code (0: disabled/default, 1: enabled)");
MODULE_PARM_DESC(mr_largepage,
		 "use large page for MR (0: use PAGE_SIZE (default), "
		 "1: use large page depending on MR size");
MODULE_PARM_DESC(lock_hcalls,
		 "serialize all hCalls made by the driver "
		 "(default: autodetect)");

DEFINE_RWLOCK(ehca_qp_idr_lock);
DEFINE_RWLOCK(ehca_cq_idr_lock);
DEFINE_IDR(ehca_qp_idr);
DEFINE_IDR(ehca_cq_idr);

static LIST_HEAD(shca_list); /* list of all registered ehcas */
static DEFINE_SPINLOCK(shca_list_lock);

static struct timer_list poll_eqs_timer;

#ifdef CONFIG_PPC_64K_PAGES
static struct kmem_cache *ctblk_cache;

void *ehca_alloc_fw_ctrlblock(gfp_t flags)
{
	void *ret = kmem_cache_zalloc(ctblk_cache, flags);
	if (!ret)
		ehca_gen_err("Out of memory for ctblk");
	return ret;
}

void ehca_free_fw_ctrlblock(void *ptr)
{
	if (ptr)
		kmem_cache_free(ctblk_cache, ptr);

}
#endif

int ehca2ib_return_code(u64 ehca_rc)
{
	switch (ehca_rc) {
	case H_SUCCESS:
		return 0;
	case H_RESOURCE:             /* Resource in use */
	case H_BUSY:
		return -EBUSY;
	case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
	case H_CONSTRAINED:          /* resource constraint */
	case H_NO_MEM:
		return -ENOMEM;
	default:
		return -EINVAL;
	}
}

static int ehca_create_slab_caches(void)
{
	int ret;

	ret = ehca_init_pd_cache();
	if (ret) {
		ehca_gen_err("Cannot create PD SLAB cache.");
		return ret;
	}

	ret = ehca_init_cq_cache();
	if (ret) {
		ehca_gen_err("Cannot create CQ SLAB cache.");
		goto create_slab_caches2;
	}

	ret = ehca_init_qp_cache();
	if (ret) {
		ehca_gen_err("Cannot create QP SLAB cache.");
		goto create_slab_caches3;
	}

	ret = ehca_init_av_cache();
	if (ret) {
		ehca_gen_err("Cannot create AV SLAB cache.");
		goto create_slab_caches4;
	}

	ret = ehca_init_mrmw_cache();
	if (ret) {
		ehca_gen_err("Cannot create MR&MW SLAB cache.");
		goto create_slab_caches5;
	}

	ret = ehca_init_small_qp_cache();
	if (ret) {
		ehca_gen_err("Cannot create small queue SLAB cache.");
		goto create_slab_caches6;
	}

#ifdef CONFIG_PPC_64K_PAGES
	ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
					EHCA_PAGESIZE, H_CB_ALIGNMENT,
					SLAB_HWCACHE_ALIGN,
					NULL);
	if (!ctblk_cache) {
		ehca_gen_err("Cannot create ctblk SLAB cache.");
		ehca_cleanup_small_qp_cache();
		goto create_slab_caches6;
	}
#endif
	return 0;

create_slab_caches6:
	ehca_cleanup_mrmw_cache();

create_slab_caches5:
	ehca_cleanup_av_cache();

create_slab_caches4:
	ehca_cleanup_qp_cache();

create_slab_caches3:
	ehca_cleanup_cq_cache();

create_slab_caches2:
	ehca_cleanup_pd_cache();

	return ret;
}

static void ehca_destroy_slab_caches(void)
{
	ehca_cleanup_small_qp_cache();
	ehca_cleanup_mrmw_cache();
	ehca_cleanup_av_cache();
	ehca_cleanup_qp_cache();
	ehca_cleanup_cq_cache();
	ehca_cleanup_pd_cache();
#ifdef CONFIG_PPC_64K_PAGES
	if (ctblk_cache)
		kmem_cache_destroy(ctblk_cache);
#endif
}

#define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
#define EHCA_REVID    EHCA_BMASK_IBM(40, 63)

static struct cap_descr {
	u64 mask;
	char *descr;
} hca_cap_descr[] = {
	{ HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
	{ HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
	{ HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
	{ HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
	{ HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
	{ HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
	{ HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
	{ HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
	{ HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
	{ HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
	{ HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
	{ HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
	{ HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
	{ HCA_CAP_SRQ, "HCA_CAP_SRQ" },
	{ HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
	{ HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
	{ HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
	{ HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
};

static int ehca_sense_attributes(struct ehca_shca *shca)
{
	int i, ret = 0;
	u64 h_ret;
	struct hipz_query_hca *rblock;
	struct hipz_query_port *port;

	static const u32 pgsize_map[] = {
		HCA_CAP_MR_PGSIZE_4K,  0x1000,
		HCA_CAP_MR_PGSIZE_64K, 0x10000,
		HCA_CAP_MR_PGSIZE_1M,  0x100000,
		HCA_CAP_MR_PGSIZE_16M, 0x1000000,
	};

	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
	if (!rblock) {
		ehca_gen_err("Cannot allocate rblock memory.");
		return -ENOMEM;
	}

	h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
	if (h_ret != H_SUCCESS) {
		ehca_gen_err("Cannot query device properties. h_ret=%li",
			     h_ret);
		ret = -EPERM;
		goto sense_attributes1;
	}

	if (ehca_nr_ports == 1)
		shca->num_ports = 1;
	else
		shca->num_ports = (u8)rblock->num_ports;

	ehca_gen_dbg(" ... found %x ports", rblock->num_ports);

	if (ehca_hw_level == 0) {
		u32 hcaaver;
		u32 revid;

		hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
		revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);

		ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);

		if (hcaaver == 1) {
			if (revid <= 3)
				shca->hw_level = 0x10 | (revid + 1);
			else
				shca->hw_level = 0x14;
		} else if (hcaaver == 2) {
			if (revid == 0)
				shca->hw_level = 0x21;
			else if (revid == 0x10)
				shca->hw_level = 0x22;
			else if (revid == 0x20 || revid == 0x21)
				shca->hw_level = 0x23;
		}

		if (!shca->hw_level) {
			ehca_gen_warn("unknown hardware version"
				      " - assuming default level");
			shca->hw_level = 0x22;
		}
	} else
		shca->hw_level = ehca_hw_level;
	ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);

	shca->hca_cap = rblock->hca_cap_indicators;
	ehca_gen_dbg(" ... HCA capabilities:");
	for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
		if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
			ehca_gen_dbg("   %s", hca_cap_descr[i].descr);

	/* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
	 * a firmware property, so it's valid across all adapters
	 */
	if (ehca_lock_hcalls == -1)
		ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);

	/* translate supported MR page sizes; always support 4K */
	shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
	if (ehca_mr_largepage) { /* support extra sizes only if enabled */
		for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
			if (rblock->memory_page_size_supported & pgsize_map[i])
				shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
	}

	/* query max MTU from first port -- it's the same for all ports */
	port = (struct hipz_query_port *)rblock;
	h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
	if (h_ret != H_SUCCESS) {
		ehca_gen_err("Cannot query port properties. h_ret=%li",
			     h_ret);
		ret = -EPERM;
		goto sense_attributes1;
	}

	shca->max_mtu = port->max_mtu;

sense_attributes1:
	ehca_free_fw_ctrlblock(rblock);
	return ret;
}

static int init_node_guid(struct ehca_shca *shca)
{
	int ret = 0;
	struct hipz_query_hca *rblock;

	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
	if (!rblock) {
		ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
		return -ENOMEM;
	}

	if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
		ehca_err(&shca->ib_device, "Can't query device properties");
		ret = -EINVAL;
		goto init_node_guid1;
	}

	memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));

init_node_guid1:
	ehca_free_fw_ctrlblock(rblock);
	return ret;
}

int ehca_init_device(struct ehca_shca *shca)
{
	int ret;

	ret = init_node_guid(shca);
	if (ret)
		return ret;

	strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
	shca->ib_device.owner               = THIS_MODULE;

	shca->ib_device.uverbs_abi_ver	    = 8;
	shca->ib_device.uverbs_cmd_mask	    =
		(1ull << IB_USER_VERBS_CMD_GET_CONTEXT)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)	|
		(1ull << IB_USER_VERBS_CMD_QUERY_PORT)		|
		(1ull << IB_USER_VERBS_CMD_ALLOC_PD)		|
		(1ull << IB_USER_VERBS_CMD_DEALLOC_PD)		|
		(1ull << IB_USER_VERBS_CMD_REG_MR)		|
		(1ull << IB_USER_VERBS_CMD_DEREG_MR)		|
		(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)	|
		(1ull << IB_USER_VERBS_CMD_CREATE_CQ)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)		|
		(1ull << IB_USER_VERBS_CMD_CREATE_QP)		|
		(1ull << IB_USER_VERBS_CMD_MODIFY_QP)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_QP)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_QP)		|
		(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)	|
		(1ull << IB_USER_VERBS_CMD_DETACH_MCAST);

	shca->ib_device.node_type           = RDMA_NODE_IB_CA;
	shca->ib_device.phys_port_cnt       = shca->num_ports;
	shca->ib_device.num_comp_vectors    = 1;
	shca->ib_device.dma_device          = &shca->ofdev->dev;
	shca->ib_device.query_device        = ehca_query_device;
	shca->ib_device.query_port          = ehca_query_port;
	shca->ib_device.query_gid           = ehca_query_gid;
	shca->ib_device.query_pkey          = ehca_query_pkey;
	/* shca->in_device.modify_device    = ehca_modify_device    */
	shca->ib_device.modify_port         = ehca_modify_port;
	shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
	shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
	shca->ib_device.alloc_pd            = ehca_alloc_pd;
	shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
	shca->ib_device.create_ah	    = ehca_create_ah;
	/* shca->ib_device.modify_ah	    = ehca_modify_ah;	    */
	shca->ib_device.query_ah	    = ehca_query_ah;
	shca->ib_device.destroy_ah	    = ehca_destroy_ah;
	shca->ib_device.create_qp	    = ehca_create_qp;
	shca->ib_device.modify_qp	    = ehca_modify_qp;
	shca->ib_device.query_qp	    = ehca_query_qp;
	shca->ib_device.destroy_qp	    = ehca_destroy_qp;
	shca->ib_device.post_send	    = ehca_post_send;
	shca->ib_device.post_recv	    = ehca_post_recv;
	shca->ib_device.create_cq	    = ehca_create_cq;
	shca->ib_device.destroy_cq	    = ehca_destroy_cq;
	shca->ib_device.resize_cq	    = ehca_resize_cq;
	shca->ib_device.poll_cq		    = ehca_poll_cq;
	/* shca->ib_device.peek_cq	    = ehca_peek_cq;	    */
	shca->ib_device.req_notify_cq	    = ehca_req_notify_cq;
	/* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
	shca->ib_device.get_dma_mr	    = ehca_get_dma_mr;
	shca->ib_device.reg_phys_mr	    = ehca_reg_phys_mr;
	shca->ib_device.reg_user_mr	    = ehca_reg_user_mr;
	shca->ib_device.query_mr	    = ehca_query_mr;
	shca->ib_device.dereg_mr	    = ehca_dereg_mr;
	shca->ib_device.rereg_phys_mr	    = ehca_rereg_phys_mr;
	shca->ib_device.alloc_mw	    = ehca_alloc_mw;
	shca->ib_device.bind_mw		    = ehca_bind_mw;
	shca->ib_device.dealloc_mw	    = ehca_dealloc_mw;
	shca->ib_device.alloc_fmr	    = ehca_alloc_fmr;
	shca->ib_device.map_phys_fmr	    = ehca_map_phys_fmr;
	shca->ib_device.unmap_fmr	    = ehca_unmap_fmr;
	shca->ib_device.dealloc_fmr	    = ehca_dealloc_fmr;
	shca->ib_device.attach_mcast	    = ehca_attach_mcast;
	shca->ib_device.detach_mcast	    = ehca_detach_mcast;
	/* shca->ib_device.process_mad	    = ehca_process_mad;	    */
	shca->ib_device.mmap		    = ehca_mmap;

	if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
		shca->ib_device.uverbs_cmd_mask |=
			(1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
			(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
			(1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
			(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);

		shca->ib_device.create_srq          = ehca_create_srq;
		shca->ib_device.modify_srq          = ehca_modify_srq;
		shca->ib_device.query_srq           = ehca_query_srq;
		shca->ib_device.destroy_srq         = ehca_destroy_srq;
		shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
	}

	return ret;
}

static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
{
	struct ehca_sport *sport = &shca->sport[port - 1];
	struct ib_cq *ibcq;
	struct ib_qp *ibqp;
	struct ib_qp_init_attr qp_init_attr;
	int ret;