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IB/rdmavt: Add AH to rdmavt

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Original patch is from Kamal Heib <kamalh@mellanox.com>. It has
been split into three separate patches. This one for rdmavt,
a follow on for qib, and one for hfi1.

Create datastructure for address handle and implement the
create/destroy/modify/query of address handle for rdmavt.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Kamal Heib
2016-01-06 10:03:59 -08:00
committed by Doug Ledford
parent f2f342115e
commit 119a8e708d
3 changed files with 115 additions and 5 deletions
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98
drivers/infiniband/sw/rdmavt/ah.c
View File

@@ -45,7 +45,49 @@
*
*/
#include <linux/slab.h>
#include "ah.h"
#include "vt.h" /* for prints */
/**
* rvt_check_ah - validate the attributes of AH
* @ibdev: the ib device
* @ah_attr: the attributes of the AH
*/
int rvt_check_ah(struct ib_device *ibdev,
struct ib_ah_attr *ah_attr)
{
int err;
struct ib_port_attr port_attr;
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
enum rdma_link_layer link = rdma_port_get_link_layer(ibdev,
ah_attr->port_num);
err = ib_query_port(ibdev, ah_attr->port_num, &port_attr);
if (err)
return -EINVAL;
if (ah_attr->port_num < 1 ||
ah_attr->port_num > ibdev->phys_port_cnt)
return -EINVAL;
if (ah_attr->static_rate != IB_RATE_PORT_CURRENT &&
ib_rate_to_mbps(ah_attr->static_rate) < 0)
return -EINVAL;
if ((ah_attr->ah_flags & IB_AH_GRH) &&
ah_attr->grh.sgid_index >= port_attr.gid_tbl_len)
return -EINVAL;
if (link != IB_LINK_LAYER_ETHERNET) {
if (ah_attr->dlid == 0)
return -EINVAL;
if (ah_attr->dlid >= RVT_MULTICAST_LID_BASE &&
ah_attr->dlid != RVT_PERMISSIVE_LID &&
!(ah_attr->ah_flags & IB_AH_GRH))
return -EINVAL;
}
if (rdi->driver_f.check_ah(ibdev, ah_attr))
return -EINVAL;
return 0;
}
EXPORT_SYMBOL(rvt_check_ah);
/**
* rvt_create_ah - create an address handle
@@ -57,20 +99,68 @@
struct ib_ah *rvt_create_ah(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
return ERR_PTR(-EOPNOTSUPP);
struct rvt_ah *ah;
struct rvt_dev_info *dev = ib_to_rvt(pd->device);
unsigned long flags;
if (rvt_check_ah(pd->device, ah_attr))
return ERR_PTR(-EINVAL);
ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
spin_lock_irqsave(&dev->n_ahs_lock, flags);
if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
spin_unlock(&dev->n_ahs_lock);
kfree(ah);
return ERR_PTR(-ENOMEM);
}
dev->n_ahs_allocated++;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
ah->attr = *ah_attr;
atomic_set(&ah->refcount, 0);
return &ah->ibah;
}
int rvt_destroy_ah(struct ib_ah *ibah)
{
return -EOPNOTSUPP;
struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
struct rvt_ah *ah = ibah_to_rvtah(ibah);
unsigned long flags;
if (atomic_read(&ah->refcount) != 0)
return -EBUSY;
spin_lock_irqsave(&dev->n_ahs_lock, flags);
dev->n_ahs_allocated--;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
kfree(ah);
return 0;
}
int rvt_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
return -EOPNOTSUPP;
struct rvt_ah *ah = ibah_to_rvtah(ibah);
if (rvt_check_ah(ibah->device, ah_attr))
return -EINVAL;
ah->attr = *ah_attr;
return 0;
}
int rvt_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
return -EOPNOTSUPP;
struct rvt_ah *ah = ibah_to_rvtah(ibah);
*ah_attr = ah->attr;
return 0;
}