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path: root/drivers/infiniband/hw/ehca/ehca_main.c
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Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_main.c')
-rw-r--r--drivers/infiniband/hw/ehca/ehca_main.c83
1 files changed, 68 insertions, 15 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 598844d2edc..bb02a86aa52 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -44,6 +44,8 @@
#include <linux/slab.h>
#endif
+#include <linux/notifier.h>
+#include <linux/memory.h>
#include "ehca_classes.h"
#include "ehca_iverbs.h"
#include "ehca_mrmw.h"
@@ -366,22 +368,23 @@ static int ehca_sense_attributes(struct ehca_shca *shca)
shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
/* Set maximum number of CQs and QPs to calculate EQ size */
- if (ehca_max_qp == -1)
- ehca_max_qp = min_t(int, rblock->max_qp, EHCA_MAX_NUM_QUEUES);
- else if (ehca_max_qp < 1 || ehca_max_qp > rblock->max_qp) {
- ehca_gen_err("Requested number of QPs is out of range (1 - %i) "
- "specified by HW", rblock->max_qp);
- ret = -EINVAL;
- goto sense_attributes1;
+ if (shca->max_num_qps == -1)
+ shca->max_num_qps = min_t(int, rblock->max_qp,
+ EHCA_MAX_NUM_QUEUES);
+ else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
+ ehca_gen_warn("The requested number of QPs is out of range "
+ "(1 - %i) specified by HW. Value is set to %i",
+ rblock->max_qp, rblock->max_qp);
+ shca->max_num_qps = rblock->max_qp;
}
- if (ehca_max_cq == -1)
- ehca_max_cq = min_t(int, rblock->max_cq, EHCA_MAX_NUM_QUEUES);
- else if (ehca_max_cq < 1 || ehca_max_cq > rblock->max_cq) {
- ehca_gen_err("Requested number of CQs is out of range (1 - %i) "
- "specified by HW", rblock->max_cq);
- ret = -EINVAL;
- goto sense_attributes1;
+ if (shca->max_num_cqs == -1)
+ shca->max_num_cqs = min_t(int, rblock->max_cq,
+ EHCA_MAX_NUM_QUEUES);
+ else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
+ ehca_gen_warn("The requested number of CQs is out of range "
+ "(1 - %i) specified by HW. Value is set to %i",
+ rblock->max_cq, rblock->max_cq);
}
/* query max MTU from first port -- it's the same for all ports */
@@ -733,9 +736,13 @@ static int __devinit ehca_probe(struct of_device *dev,
ehca_gen_err("Cannot allocate shca memory.");
return -ENOMEM;
}
+
mutex_init(&shca->modify_mutex);
atomic_set(&shca->num_cqs, 0);
atomic_set(&shca->num_qps, 0);
+ shca->max_num_qps = ehca_max_qp;
+ shca->max_num_cqs = ehca_max_cq;
+
for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
spin_lock_init(&shca->sport[i].mod_sqp_lock);
@@ -755,7 +762,7 @@ static int __devinit ehca_probe(struct of_device *dev,
goto probe1;
}
- eq_size = 2 * ehca_max_cq + 4 * ehca_max_qp;
+ eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
/* create event queues */
ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
if (ret) {
@@ -964,6 +971,41 @@ void ehca_poll_eqs(unsigned long data)
spin_unlock(&shca_list_lock);
}
+static int ehca_mem_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ static unsigned long ehca_dmem_warn_time;
+
+ switch (action) {
+ case MEM_CANCEL_OFFLINE:
+ case MEM_CANCEL_ONLINE:
+ case MEM_ONLINE:
+ case MEM_OFFLINE:
+ return NOTIFY_OK;
+ case MEM_GOING_ONLINE:
+ case MEM_GOING_OFFLINE:
+ /* only ok if no hca is attached to the lpar */
+ spin_lock(&shca_list_lock);
+ if (list_empty(&shca_list)) {
+ spin_unlock(&shca_list_lock);
+ return NOTIFY_OK;
+ } else {
+ spin_unlock(&shca_list_lock);
+ if (printk_timed_ratelimit(&ehca_dmem_warn_time,
+ 30 * 1000))
+ ehca_gen_err("DMEM operations are not allowed"
+ "as long as an ehca adapter is"
+ "attached to the LPAR");
+ return NOTIFY_BAD;
+ }
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block ehca_mem_nb = {
+ .notifier_call = ehca_mem_notifier,
+};
+
static int __init ehca_module_init(void)
{
int ret;
@@ -991,6 +1033,12 @@ static int __init ehca_module_init(void)
goto module_init2;
}
+ ret = register_memory_notifier(&ehca_mem_nb);
+ if (ret) {
+ ehca_gen_err("Failed registering memory add/remove notifier");
+ goto module_init3;
+ }
+
if (ehca_poll_all_eqs != 1) {
ehca_gen_err("WARNING!!!");
ehca_gen_err("It is possible to lose interrupts.");
@@ -1003,6 +1051,9 @@ static int __init ehca_module_init(void)
return 0;
+module_init3:
+ ibmebus_unregister_driver(&ehca_driver);
+
module_init2:
ehca_destroy_slab_caches();
@@ -1018,6 +1069,8 @@ static void __exit ehca_module_exit(void)
ibmebus_unregister_driver(&ehca_driver);
+ unregister_memory_notifier(&ehca_mem_nb);
+
ehca_destroy_slab_caches();
ehca_destroy_comp_pool();