[PATCH] IB/ipath: enforce device resource limits
These limits are somewhat artificial in that we don't actually have any
device limits. However, the verbs layer expects that such limits exist
and are enforced, so we make up arbitrary (but sensible) limits.
Signed-off-by: Robert Walsh <robert.walsh@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index e04c761..70547d1 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -56,6 +56,59 @@
module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(debug, "Verbs debug mask");
+static unsigned int ib_ipath_max_pds = 0xFFFF;
+module_param_named(max_pds, ib_ipath_max_pds, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_pds,
+ "Maximum number of protection domains to support");
+
+static unsigned int ib_ipath_max_ahs = 0xFFFF;
+module_param_named(max_ahs, ib_ipath_max_ahs, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
+
+unsigned int ib_ipath_max_cqes = 0x2FFFF;
+module_param_named(max_cqes, ib_ipath_max_cqes, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_cqes,
+ "Maximum number of completion queue entries to support");
+
+unsigned int ib_ipath_max_cqs = 0x1FFFF;
+module_param_named(max_cqs, ib_ipath_max_cqs, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
+
+unsigned int ib_ipath_max_qp_wrs = 0x3FFF;
+module_param_named(max_qp_wrs, ib_ipath_max_qp_wrs, uint,
+ S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
+
+unsigned int ib_ipath_max_sges = 0x60;
+module_param_named(max_sges, ib_ipath_max_sges, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
+
+unsigned int ib_ipath_max_mcast_grps = 16384;
+module_param_named(max_mcast_grps, ib_ipath_max_mcast_grps, uint,
+ S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_mcast_grps,
+ "Maximum number of multicast groups to support");
+
+unsigned int ib_ipath_max_mcast_qp_attached = 16;
+module_param_named(max_mcast_qp_attached, ib_ipath_max_mcast_qp_attached,
+ uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_mcast_qp_attached,
+ "Maximum number of attached QPs to support");
+
+unsigned int ib_ipath_max_srqs = 1024;
+module_param_named(max_srqs, ib_ipath_max_srqs, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
+
+unsigned int ib_ipath_max_srq_sges = 128;
+module_param_named(max_srq_sges, ib_ipath_max_srq_sges,
+ uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
+
+unsigned int ib_ipath_max_srq_wrs = 0x1FFFF;
+module_param_named(max_srq_wrs, ib_ipath_max_srq_wrs,
+ uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("QLogic <support@pathscale.com>");
MODULE_DESCRIPTION("QLogic InfiniPath driver");
@@ -581,24 +634,25 @@
props->sys_image_guid = dev->sys_image_guid;
props->max_mr_size = ~0ull;
- props->max_qp = 0xffff;
- props->max_qp_wr = 0xffff;
- props->max_sge = 255;
- props->max_cq = 0xffff;
- props->max_cqe = 0xffff;
- props->max_mr = 0xffff;
- props->max_pd = 0xffff;
+ props->max_qp = dev->qp_table.max;
+ props->max_qp_wr = ib_ipath_max_qp_wrs;
+ props->max_sge = ib_ipath_max_sges;
+ props->max_cq = ib_ipath_max_cqs;
+ props->max_ah = ib_ipath_max_ahs;
+ props->max_cqe = ib_ipath_max_cqes;
+ props->max_mr = dev->lk_table.max;
+ props->max_pd = ib_ipath_max_pds;
props->max_qp_rd_atom = 1;
props->max_qp_init_rd_atom = 1;
/* props->max_res_rd_atom */
- props->max_srq = 0xffff;
- props->max_srq_wr = 0xffff;
- props->max_srq_sge = 255;
+ props->max_srq = ib_ipath_max_srqs;
+ props->max_srq_wr = ib_ipath_max_srq_wrs;
+ props->max_srq_sge = ib_ipath_max_srq_sges;
/* props->local_ca_ack_delay */
props->atomic_cap = IB_ATOMIC_HCA;
props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
- props->max_mcast_grp = 0xffff;
- props->max_mcast_qp_attach = 0xffff;
+ props->max_mcast_grp = ib_ipath_max_mcast_grps;
+ props->max_mcast_qp_attach = ib_ipath_max_mcast_qp_attached;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
@@ -741,15 +795,30 @@
struct ib_ucontext *context,
struct ib_udata *udata)
{
+ struct ipath_ibdev *dev = to_idev(ibdev);
struct ipath_pd *pd;
struct ib_pd *ret;
+ /*
+ * This is actually totally arbitrary. Some correctness tests
+ * assume there's a maximum number of PDs that can be allocated.
+ * We don't actually have this limit, but we fail the test if
+ * we allow allocations of more than we report for this value.
+ */
+
+ if (dev->n_pds_allocated == ib_ipath_max_pds) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
pd = kmalloc(sizeof *pd, GFP_KERNEL);
if (!pd) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
+ dev->n_pds_allocated++;
+
/* ib_alloc_pd() will initialize pd->ibpd. */
pd->user = udata != NULL;
@@ -762,6 +831,9 @@
static int ipath_dealloc_pd(struct ib_pd *ibpd)
{
struct ipath_pd *pd = to_ipd(ibpd);
+ struct ipath_ibdev *dev = to_idev(ibpd->device);
+
+ dev->n_pds_allocated--;
kfree(pd);
@@ -780,6 +852,12 @@
{
struct ipath_ah *ah;
struct ib_ah *ret;
+ struct ipath_ibdev *dev = to_idev(pd->device);
+
+ if (dev->n_ahs_allocated == ib_ipath_max_ahs) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
/* A multicast address requires a GRH (see ch. 8.4.1). */
if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
@@ -794,7 +872,7 @@
goto bail;
}
- if (ah_attr->port_num != 1 ||
+ if (ah_attr->port_num < 1 ||
ah_attr->port_num > pd->device->phys_port_cnt) {
ret = ERR_PTR(-EINVAL);
goto bail;
@@ -806,6 +884,8 @@
goto bail;
}
+ dev->n_ahs_allocated++;
+
/* ib_create_ah() will initialize ah->ibah. */
ah->attr = *ah_attr;
@@ -823,8 +903,11 @@
*/
static int ipath_destroy_ah(struct ib_ah *ibah)
{
+ struct ipath_ibdev *dev = to_idev(ibah->device);
struct ipath_ah *ah = to_iah(ibah);
+ dev->n_ahs_allocated--;
+
kfree(ah);
return 0;