[linux-block.git] / drivers / infiniband / hw / mthca / mthca_av.c

/*
 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, 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.
 */

#include <linux/string.h>
#include <linux/slab.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_cache.h>

#include "mthca_dev.h"

enum {
      MTHCA_RATE_TAVOR_FULL   = 0,
      MTHCA_RATE_TAVOR_1X     = 1,
      MTHCA_RATE_TAVOR_4X     = 2,
      MTHCA_RATE_TAVOR_1X_DDR = 3
};

enum {
      MTHCA_RATE_MEMFREE_FULL    = 0,
      MTHCA_RATE_MEMFREE_QUARTER = 1,
      MTHCA_RATE_MEMFREE_EIGHTH  = 2,
      MTHCA_RATE_MEMFREE_HALF    = 3
};

struct mthca_av {
	__be32 port_pd;
	u8     reserved1;
	u8     g_slid;
	__be16 dlid;
	u8     reserved2;
	u8     gid_index;
	u8     msg_sr;
	u8     hop_limit;
	__be32 sl_tclass_flowlabel;
	__be32 dgid[4];
};

static enum ib_rate memfree_rate_to_ib(u8 mthca_rate, u8 port_rate)
{
	switch (mthca_rate) {
	case MTHCA_RATE_MEMFREE_EIGHTH:
		return mult_to_ib_rate(port_rate >> 3);
	case MTHCA_RATE_MEMFREE_QUARTER:
		return mult_to_ib_rate(port_rate >> 2);
	case MTHCA_RATE_MEMFREE_HALF:
		return mult_to_ib_rate(port_rate >> 1);
	case MTHCA_RATE_MEMFREE_FULL:
	default:
		return mult_to_ib_rate(port_rate);
	}
}

static enum ib_rate tavor_rate_to_ib(u8 mthca_rate, u8 port_rate)
{
	switch (mthca_rate) {
	case MTHCA_RATE_TAVOR_1X:     return IB_RATE_2_5_GBPS;
	case MTHCA_RATE_TAVOR_1X_DDR: return IB_RATE_5_GBPS;
	case MTHCA_RATE_TAVOR_4X:     return IB_RATE_10_GBPS;
	default:		      return mult_to_ib_rate(port_rate);
	}
}

enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u32 port)
{
	if (mthca_is_memfree(dev)) {
		/* Handle old Arbel FW */
		if (dev->limits.stat_rate_support == 0x3 && mthca_rate)
			return IB_RATE_2_5_GBPS;

		return memfree_rate_to_ib(mthca_rate, dev->rate[port - 1]);
	} else
		return tavor_rate_to_ib(mthca_rate, dev->rate[port - 1]);
}

static u8 ib_rate_to_memfree(u8 req_rate, u8 cur_rate)
{
	if (cur_rate <= req_rate)
		return 0;

	/*
	 * Inter-packet delay (IPD) to get from rate X down to a rate
	 * no more than Y is (X - 1) / Y.
	 */
	switch ((cur_rate - 1) / req_rate) {
	case 0:	 return MTHCA_RATE_MEMFREE_FULL;
	case 1:	 return MTHCA_RATE_MEMFREE_HALF;
	case 2:
	case 3:	 return MTHCA_RATE_MEMFREE_QUARTER;
	default: return MTHCA_RATE_MEMFREE_EIGHTH;
	}
}

static u8 ib_rate_to_tavor(u8 static_rate)
{
	switch (static_rate) {
	case IB_RATE_2_5_GBPS: return MTHCA_RATE_TAVOR_1X;
	case IB_RATE_5_GBPS:   return MTHCA_RATE_TAVOR_1X_DDR;
	case IB_RATE_10_GBPS:  return MTHCA_RATE_TAVOR_4X;
	default:	       return MTHCA_RATE_TAVOR_FULL;
	}
}

u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u32 port)
{
	u8 rate;

	if (!static_rate || ib_rate_to_mult(static_rate) >= dev->rate[port - 1])
		return 0;

	if (mthca_is_memfree(dev))
		rate = ib_rate_to_memfree(ib_rate_to_mult(static_rate),
					  dev->rate[port - 1]);
	else
		rate = ib_rate_to_tavor(static_rate);

	if (!(dev->limits.stat_rate_support & (1 << rate)))
		rate = 1;

	return rate;
}

int mthca_create_ah(struct mthca_dev *dev,
		    struct mthca_pd *pd,
		    struct rdma_ah_attr *ah_attr,
		    struct mthca_ah *ah)
{
	u32 index = -1;
	struct mthca_av *av = NULL;

	ah->type = MTHCA_AH_PCI_POOL;

	if (mthca_is_memfree(dev)) {
		ah->av   = kmalloc(sizeof *ah->av, GFP_ATOMIC);
		if (!ah->av)
			return -ENOMEM;

		ah->type = MTHCA_AH_KMALLOC;
		av       = ah->av;
	} else if (!atomic_read(&pd->sqp_count) &&
		 !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
		index = mthca_alloc(&dev->av_table.alloc);

		/* fall back to allocate in host memory */
		if (index == -1)
			goto on_hca_fail;

		av = kmalloc(sizeof *av, GFP_ATOMIC);
		if (!av)
			goto on_hca_fail;

		ah->type = MTHCA_AH_ON_HCA;
		ah->avdma  = dev->av_table.ddr_av_base +
			index * MTHCA_AV_SIZE;
	}

on_hca_fail:
	if (ah->type == MTHCA_AH_PCI_POOL) {
		ah->av = dma_pool_zalloc(dev->av_table.pool,
					 GFP_ATOMIC, &ah->avdma);
		if (!ah->av)
			return -ENOMEM;

		av = ah->av;
	}

	ah->key = pd->ntmr.ibmr.lkey;

	av->port_pd = cpu_to_be32(pd->pd_num |
				  (rdma_ah_get_port_num(ah_attr) << 24));
	av->g_slid  = rdma_ah_get_path_bits(ah_attr);
	av->dlid    = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
	av->msg_sr  = (3 << 4) | /* 2K message */
		mthca_get_rate(dev, rdma_ah_get_static_rate(ah_attr),
			       rdma_ah_get_port_num(ah_attr));
	av->sl_tclass_flowlabel = cpu_to_be32(rdma_ah_get_sl(ah_attr) << 28);
	if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
		const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);

		av->g_slid |= 0x80;
		av->gid_index = (rdma_ah_get_port_num(ah_attr) - 1) *
				  dev->limits.gid_table_len +
				  grh->sgid_index;
		av->hop_limit = grh->hop_limit;
		av->sl_tclass_flowlabel |=
			cpu_to_be32((grh->traffic_class << 20) |
				    grh->flow_label);
		memcpy(av->dgid, grh->dgid.raw, 16);
	} else {
		/* Arbel workaround -- low byte of GID must be 2 */
		av->dgid[3] = cpu_to_be32(2);
	}

	if (0) {
		int j;

		mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
			  av, (unsigned long) ah->avdma);
		for (j = 0; j < 8; ++j)
			printk(KERN_DEBUG "  [%2x] %08x\n",
			       j * 4, be32_to_cpu(((__be32 *) av)[j]));
	}

	if (ah->type == MTHCA_AH_ON_HCA) {
		memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
			    av, MTHCA_AV_SIZE);
		kfree(av);
	}

	return 0;
}

int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
{
	switch (ah->type) {
	case MTHCA_AH_ON_HCA:
		mthca_free(&dev->av_table.alloc,
			   (ah->avdma - dev->av_table.ddr_av_base) /
			   MTHCA_AV_SIZE);
		break;

	case MTHCA_AH_PCI_POOL:
		dma_pool_free(dev->av_table.pool, ah->av, ah->avdma);
		break;

	case MTHCA_AH_KMALLOC:
		kfree(ah->av);
		break;
	}

	return 0;
}

int mthca_ah_grh_present(struct mthca_ah *ah)
{
	return !!(ah->av->g_slid & 0x80);
}

int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
		  struct ib_ud_header *header)
{
	if (ah->type == MTHCA_AH_ON_HCA)
		return -EINVAL;

	header->lrh.service_level   = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
	header->lrh.destination_lid = ah->av->dlid;
	header->lrh.source_lid      = cpu_to_be16(ah->av->g_slid & 0x7f);
	if (mthca_ah_grh_present(ah)) {
		header->grh.traffic_class =
			(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
		header->grh.flow_label    =
			ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
		header->grh.hop_limit     = ah->av->hop_limit;
		header->grh.source_gid = ah->ibah.sgid_attr->gid;
		memcpy(header->grh.destination_gid.raw,
		       ah->av->dgid, 16);
	}

	return 0;
}

int mthca_ah_query(struct ib_ah *ibah, struct rdma_ah_attr *attr)
{
	struct mthca_ah *ah   = to_mah(ibah);
	struct mthca_dev *dev = to_mdev(ibah->device);
	u32 port_num = be32_to_cpu(ah->av->port_pd) >> 24;

	/* Only implement for MAD and memfree ah for now. */
	if (ah->type == MTHCA_AH_ON_HCA)
		return -ENOSYS;

	memset(attr, 0, sizeof *attr);
	attr->type = ibah->type;
	rdma_ah_set_dlid(attr, be16_to_cpu(ah->av->dlid));
	rdma_ah_set_sl(attr, be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28);
	rdma_ah_set_port_num(attr, port_num);
	rdma_ah_set_static_rate(attr,
				mthca_rate_to_ib(dev, ah->av->msg_sr & 0x7,
						 port_num));
	rdma_ah_set_path_bits(attr, ah->av->g_slid & 0x7F);
	if (mthca_ah_grh_present(ah)) {
		u32 tc_fl = be32_to_cpu(ah->av->sl_tclass_flowlabel);

		rdma_ah_set_grh(attr, NULL,
				tc_fl & 0xfffff,
				ah->av->gid_index &
				(dev->limits.gid_table_len - 1),
				ah->av->hop_limit,
				(tc_fl >> 20) & 0xff);
		rdma_ah_set_dgid_raw(attr, ah->av->dgid);
	}

	return 0;
}

int mthca_init_av_table(struct mthca_dev *dev)
{
	int err;

	if (mthca_is_memfree(dev))
		return 0;

	err = mthca_alloc_init(&dev->av_table.alloc,
			       dev->av_table.num_ddr_avs,
			       dev->av_table.num_ddr_avs - 1,
			       0);
	if (err)
		return err;

	dev->av_table.pool = dma_pool_create("mthca_av", &dev->pdev->dev,
					     MTHCA_AV_SIZE,
					     MTHCA_AV_SIZE, 0);
	if (!dev->av_table.pool)
		goto out_free_alloc;

	if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
		dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
					       dev->av_table.ddr_av_base -
					       dev->ddr_start,
					       dev->av_table.num_ddr_avs *
					       MTHCA_AV_SIZE);
		if (!dev->av_table.av_map)
			goto out_free_pool;
	} else
		dev->av_table.av_map = NULL;

	return 0;

 out_free_pool:
	dma_pool_destroy(dev->av_table.pool);

 out_free_alloc:
	mthca_alloc_cleanup(&dev->av_table.alloc);
	return -ENOMEM;
}

void mthca_cleanup_av_table(struct mthca_dev *dev)
{
	if (mthca_is_memfree(dev))
		return;

	if (dev->av_table.av_map)
		iounmap(dev->av_table.av_map);
	dma_pool_destroy(dev->av_table.pool);
	mthca_alloc_cleanup(&dev->av_table.alloc);
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (c) 2004 Topspin Communications. All rights reserved.
cd4e8fb4	3	* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
1da177e4 LT	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
1da177e4 LT	32	*/
1da177e4 LT	33
4e57b681 TS	34	#include <linux/string.h>
4e57b681 TS	35	#include <linux/slab.h>
1da177e4	36
a4d61e84 RD	37	#include <rdma/ib_verbs.h>
a4d61e84 RD	38	#include <rdma/ib_cache.h>
1da177e4 LT	39
	40	#include "mthca_dev.h"
	41
bf6a9e31 JM	42	enum {
	43	MTHCA_RATE_TAVOR_FULL = 0,
	44	MTHCA_RATE_TAVOR_1X = 1,
	45	MTHCA_RATE_TAVOR_4X = 2,
	46	MTHCA_RATE_TAVOR_1X_DDR = 3
	47	};
	48
	49	enum {
	50	MTHCA_RATE_MEMFREE_FULL = 0,
	51	MTHCA_RATE_MEMFREE_QUARTER = 1,
	52	MTHCA_RATE_MEMFREE_EIGHTH = 2,
	53	MTHCA_RATE_MEMFREE_HALF = 3
	54	};
	55
1da177e4	56	struct mthca_av {
97f52eb4 SH	57	__be32 port_pd;
	58	u8 reserved1;
	59	u8 g_slid;
	60	__be16 dlid;
	61	u8 reserved2;
	62	u8 gid_index;
	63	u8 msg_sr;
	64	u8 hop_limit;
	65	__be32 sl_tclass_flowlabel;
	66	__be32 dgid[4];
1da177e4 LT	67	};
1da177e4 LT	68
bf6a9e31 JM	69	static enum ib_rate memfree_rate_to_ib(u8 mthca_rate, u8 port_rate)
	70	{
	71	switch (mthca_rate) {
	72	case MTHCA_RATE_MEMFREE_EIGHTH:
	73	return mult_to_ib_rate(port_rate >> 3);
	74	case MTHCA_RATE_MEMFREE_QUARTER:
	75	return mult_to_ib_rate(port_rate >> 2);
	76	case MTHCA_RATE_MEMFREE_HALF:
	77	return mult_to_ib_rate(port_rate >> 1);
	78	case MTHCA_RATE_MEMFREE_FULL:
	79	default:
	80	return mult_to_ib_rate(port_rate);
	81	}
	82	}
	83
	84	static enum ib_rate tavor_rate_to_ib(u8 mthca_rate, u8 port_rate)
	85	{
	86	switch (mthca_rate) {
	87	case MTHCA_RATE_TAVOR_1X: return IB_RATE_2_5_GBPS;
	88	case MTHCA_RATE_TAVOR_1X_DDR: return IB_RATE_5_GBPS;
	89	case MTHCA_RATE_TAVOR_4X: return IB_RATE_10_GBPS;
b046a04e	90	default: return mult_to_ib_rate(port_rate);
bf6a9e31 JM	91	}
	92	}
	93
1fb7f897	94	enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u32 port)
bf6a9e31 JM	95	{
	96	if (mthca_is_memfree(dev)) {
	97	/* Handle old Arbel FW */
	98	if (dev->limits.stat_rate_support == 0x3 && mthca_rate)
	99	return IB_RATE_2_5_GBPS;
	100
	101	return memfree_rate_to_ib(mthca_rate, dev->rate[port - 1]);
	102	} else
	103	return tavor_rate_to_ib(mthca_rate, dev->rate[port - 1]);
	104	}
	105
	106	static u8 ib_rate_to_memfree(u8 req_rate, u8 cur_rate)
	107	{
	108	if (cur_rate <= req_rate)
	109	return 0;
	110
	111	/*
	112	* Inter-packet delay (IPD) to get from rate X down to a rate
	113	* no more than Y is (X - 1) / Y.
	114	*/
	115	switch ((cur_rate - 1) / req_rate) {
	116	case 0: return MTHCA_RATE_MEMFREE_FULL;
	117	case 1: return MTHCA_RATE_MEMFREE_HALF;
df561f66	118	case 2:
bf6a9e31 JM	119	case 3: return MTHCA_RATE_MEMFREE_QUARTER;
	120	default: return MTHCA_RATE_MEMFREE_EIGHTH;
	121	}
	122	}
	123
	124	static u8 ib_rate_to_tavor(u8 static_rate)
	125	{
	126	switch (static_rate) {
	127	case IB_RATE_2_5_GBPS: return MTHCA_RATE_TAVOR_1X;
	128	case IB_RATE_5_GBPS: return MTHCA_RATE_TAVOR_1X_DDR;
	129	case IB_RATE_10_GBPS: return MTHCA_RATE_TAVOR_4X;
	130	default: return MTHCA_RATE_TAVOR_FULL;
	131	}
	132	}
	133
1fb7f897	134	u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u32 port)
bf6a9e31 JM	135	{
	136	u8 rate;
	137
	138	if (!static_rate \|\| ib_rate_to_mult(static_rate) >= dev->rate[port - 1])
	139	return 0;
	140
	141	if (mthca_is_memfree(dev))
	142	rate = ib_rate_to_memfree(ib_rate_to_mult(static_rate),
	143	dev->rate[port - 1]);
	144	else
	145	rate = ib_rate_to_tavor(static_rate);
	146
	147	if (!(dev->limits.stat_rate_support & (1 << rate)))
	148	rate = 1;
	149
	150	return rate;
	151	}
	152
1da177e4 LT	153	int mthca_create_ah(struct mthca_dev *dev,
1da177e4 LT	154	struct mthca_pd *pd,
90898850	155	struct rdma_ah_attr *ah_attr,
1da177e4 LT	156	struct mthca_ah *ah)
	157	{
	158	u32 index = -1;
	159	struct mthca_av *av = NULL;
	160
	161	ah->type = MTHCA_AH_PCI_POOL;
	162
d10ddbf6	163	if (mthca_is_memfree(dev)) {
8df8a34d	164	ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC);
1da177e4 LT	165	if (!ah->av)
	166	return -ENOMEM;
	167
	168	ah->type = MTHCA_AH_KMALLOC;
	169	av = ah->av;
	170	} else if (!atomic_read(&pd->sqp_count) &&
	171	!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
	172	index = mthca_alloc(&dev->av_table.alloc);
	173
	174	/* fall back to allocate in host memory */
	175	if (index == -1)
	176	goto on_hca_fail;
	177
8df8a34d	178	av = kmalloc(sizeof *av, GFP_ATOMIC);
1da177e4 LT	179	if (!av)
	180	goto on_hca_fail;
	181
	182	ah->type = MTHCA_AH_ON_HCA;
	183	ah->avdma = dev->av_table.ddr_av_base +
	184	index * MTHCA_AV_SIZE;
	185	}
	186
	187	on_hca_fail:
	188	if (ah->type == MTHCA_AH_PCI_POOL) {
11880a55	189	ah->av = dma_pool_zalloc(dev->av_table.pool,
7ceb740c	190	GFP_ATOMIC, &ah->avdma);
1da177e4 LT	191	if (!ah->av)
	192	return -ENOMEM;
	193
	194	av = ah->av;
	195	}
	196
	197	ah->key = pd->ntmr.ibmr.lkey;
	198
d8966fcd DC	199	av->port_pd = cpu_to_be32(pd->pd_num \|
	200	(rdma_ah_get_port_num(ah_attr) << 24));
	201	av->g_slid = rdma_ah_get_path_bits(ah_attr);
	202	av->dlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
1da177e4	203	av->msg_sr = (3 << 4) \| /* 2K message */
d8966fcd DC	204	mthca_get_rate(dev, rdma_ah_get_static_rate(ah_attr),
	205	rdma_ah_get_port_num(ah_attr));
	206	av->sl_tclass_flowlabel = cpu_to_be32(rdma_ah_get_sl(ah_attr) << 28);
	207	if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
	208	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
	209
1da177e4	210	av->g_slid \|= 0x80;
d8966fcd DC	211	av->gid_index = (rdma_ah_get_port_num(ah_attr) - 1) *
	212	dev->limits.gid_table_len +
	213	grh->sgid_index;
	214	av->hop_limit = grh->hop_limit;
1da177e4	215	av->sl_tclass_flowlabel \|=
d8966fcd DC	216	cpu_to_be32((grh->traffic_class << 20) \|
	217	grh->flow_label);
	218	memcpy(av->dgid, grh->dgid.raw, 16);
1da177e4 LT	219	} else {
	220	/* Arbel workaround -- low byte of GID must be 2 */
	221	av->dgid[3] = cpu_to_be32(2);
	222	}
	223
	224	if (0) {
	225	int j;
	226
	227	mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
	228	av, (unsigned long) ah->avdma);
	229	for (j = 0; j < 8; ++j)
	230	printk(KERN_DEBUG " [%2x] %08x\n",
97f52eb4	231	j * 4, be32_to_cpu(((__be32 *) av)[j]));
1da177e4 LT	232	}
	233
	234	if (ah->type == MTHCA_AH_ON_HCA) {
	235	memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
	236	av, MTHCA_AV_SIZE);
	237	kfree(av);
	238	}
	239
	240	return 0;
	241	}
	242
	243	int mthca_destroy_ah(struct mthca_dev dev, struct mthca_ah ah)
	244	{
	245	switch (ah->type) {
	246	case MTHCA_AH_ON_HCA:
	247	mthca_free(&dev->av_table.alloc,
2fa5e2eb	248	(ah->avdma - dev->av_table.ddr_av_base) /
1da177e4 LT	249	MTHCA_AV_SIZE);
	250	break;
	251
	252	case MTHCA_AH_PCI_POOL:
11880a55	253	dma_pool_free(dev->av_table.pool, ah->av, ah->avdma);
1da177e4 LT	254	break;
	255
	256	case MTHCA_AH_KMALLOC:
	257	kfree(ah->av);
	258	break;
	259	}
	260
	261	return 0;
	262	}
	263
9eacee2a MT	264	int mthca_ah_grh_present(struct mthca_ah *ah)
	265	{
	266	return !!(ah->av->g_slid & 0x80);
	267	}
	268
1da177e4 LT	269	int mthca_read_ah(struct mthca_dev dev, struct mthca_ah ah,
	270	struct ib_ud_header *header)
	271	{
	272	if (ah->type == MTHCA_AH_ON_HCA)
	273	return -EINVAL;
	274
	275	header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
	276	header->lrh.destination_lid = ah->av->dlid;
97f52eb4	277	header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f);
9eacee2a	278	if (mthca_ah_grh_present(ah)) {
1da177e4 LT	279	header->grh.traffic_class =
	280	(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
	281	header->grh.flow_label =
	282	ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
3f37cae6	283	header->grh.hop_limit = ah->av->hop_limit;
89af969a	284	header->grh.source_gid = ah->ibah.sgid_attr->gid;
1da177e4 LT	285	memcpy(header->grh.destination_gid.raw,
1da177e4 LT	286	ah->av->dgid, 16);
1da177e4 LT	287	}
	288
	289	return 0;
	290	}
	291
90898850	292	int mthca_ah_query(struct ib_ah ibah, struct rdma_ah_attr attr)
1d89b1ae JM	293	{
	294	struct mthca_ah *ah = to_mah(ibah);
	295	struct mthca_dev *dev = to_mdev(ibah->device);
1fb7f897	296	u32 port_num = be32_to_cpu(ah->av->port_pd) >> 24;
1d89b1ae JM	297
	298	/* Only implement for MAD and memfree ah for now. */
	299	if (ah->type == MTHCA_AH_ON_HCA)
	300	return -ENOSYS;
	301
	302	memset(attr, 0, sizeof *attr);
44c58487	303	attr->type = ibah->type;
d8966fcd DC	304	rdma_ah_set_dlid(attr, be16_to_cpu(ah->av->dlid));
	305	rdma_ah_set_sl(attr, be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28);
	306	rdma_ah_set_port_num(attr, port_num);
	307	rdma_ah_set_static_rate(attr,
	308	mthca_rate_to_ib(dev, ah->av->msg_sr & 0x7,
	309	port_num));
	310	rdma_ah_set_path_bits(attr, ah->av->g_slid & 0x7F);
	311	if (mthca_ah_grh_present(ah)) {
	312	u32 tc_fl = be32_to_cpu(ah->av->sl_tclass_flowlabel);
	313
	314	rdma_ah_set_grh(attr, NULL,
	315	tc_fl & 0xfffff,
	316	ah->av->gid_index &
	317	(dev->limits.gid_table_len - 1),
	318	ah->av->hop_limit,
	319	(tc_fl >> 20) & 0xff);
	320	rdma_ah_set_dgid_raw(attr, ah->av->dgid);
1d89b1ae JM	321	}
	322
	323	return 0;
	324	}
	325
f4f3d0f0	326	int mthca_init_av_table(struct mthca_dev *dev)
1da177e4 LT	327	{
	328	int err;
	329
d10ddbf6	330	if (mthca_is_memfree(dev))
1da177e4 LT	331	return 0;
	332
	333	err = mthca_alloc_init(&dev->av_table.alloc,
	334	dev->av_table.num_ddr_avs,
	335	dev->av_table.num_ddr_avs - 1,
	336	0);
	337	if (err)
	338	return err;
	339
11880a55	340	dev->av_table.pool = dma_pool_create("mthca_av", &dev->pdev->dev,
1da177e4 LT	341	MTHCA_AV_SIZE,
	342	MTHCA_AV_SIZE, 0);
	343	if (!dev->av_table.pool)
	344	goto out_free_alloc;
	345
	346	if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
	347	dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
	348	dev->av_table.ddr_av_base -
	349	dev->ddr_start,
	350	dev->av_table.num_ddr_avs *
	351	MTHCA_AV_SIZE);
	352	if (!dev->av_table.av_map)
	353	goto out_free_pool;
	354	} else
	355	dev->av_table.av_map = NULL;
	356
	357	return 0;
	358
	359	out_free_pool:
11880a55	360	dma_pool_destroy(dev->av_table.pool);
1da177e4 LT	361
	362	out_free_alloc:
	363	mthca_alloc_cleanup(&dev->av_table.alloc);
	364	return -ENOMEM;
	365	}
	366
e1f7868c	367	void mthca_cleanup_av_table(struct mthca_dev *dev)
1da177e4	368	{
d10ddbf6	369	if (mthca_is_memfree(dev))
1da177e4 LT	370	return;
	371
	372	if (dev->av_table.av_map)
	373	iounmap(dev->av_table.av_map);
11880a55	374	dma_pool_destroy(dev->av_table.pool);
1da177e4 LT	375	mthca_alloc_cleanup(&dev->av_table.alloc);
1da177e4 LT	376	}