Merge branch 'linux-2.6' into for-2.6.22

[sfrench/cifs-2.6.git] / drivers / infiniband / hw / ehca / ehca_main.c

diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 1155bcf48212ef33da22d188a4530d7545e92661..4700085ba834a70f2000f316305831b267db18b0 100644 (file)
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -52,7 +52,7 @@
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
-MODULE_VERSION("SVNEHCA_0020");
+MODULE_VERSION("SVNEHCA_0022");
 
 int ehca_open_aqp1     = 0;
 int ehca_debug_level   = 0;
@@ -62,6 +62,7 @@ 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  = 1;
 
 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
 module_param_named(debug_level,   ehca_debug_level,   int, 0);
@@ -71,6 +72,7 @@ module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
 module_param_named(port_act_time, ehca_port_act_time, int, 0);
 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
 module_param_named(static_rate,   ehca_static_rate,   int, 0);
+module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
 
 MODULE_PARM_DESC(open_aqp1,
                 "AQP1 on startup (0: no (default), 1: yes)");
@@ -91,6 +93,8 @@ MODULE_PARM_DESC(poll_all_eqs,
                 " (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, 1: enabled/default)");
 
 spinlock_t ehca_qp_idr_lock;
 spinlock_t ehca_cq_idr_lock;
@@ -432,8 +436,8 @@ static int ehca_destroy_aqp1(struct ehca_sport *sport)
 
 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 {
-       return  snprintf(buf, PAGE_SIZE, "%d\n",
-                        ehca_debug_level);
+       return snprintf(buf, PAGE_SIZE, "%d\n",
+                       ehca_debug_level);
 }
 
 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
@@ -561,11 +565,11 @@ static int __devinit ehca_probe(struct ibmebus_dev *dev,
                                const struct of_device_id *id)
 {
        struct ehca_shca *shca;
-       u64 *handle;
+       const u64 *handle;
        struct ib_pd *ibpd;
        int ret;
 
-       handle = (u64 *)get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
+       handle = get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
        if (!handle) {
                ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
                             dev->ofdev.node->full_name);
@@ -583,6 +587,7 @@ static int __devinit ehca_probe(struct ibmebus_dev *dev,
                ehca_gen_err("Cannot allocate shca memory.");
                return -ENOMEM;
        }
+       mutex_init(&shca->modify_mutex);
 
        shca->ibmebus_dev = dev;
        shca->ipz_hca_handle.handle = *handle;
@@ -778,8 +783,24 @@ void ehca_poll_eqs(unsigned long data)
 
        spin_lock(&shca_list_lock);
        list_for_each_entry(shca, &shca_list, shca_list) {
-               if (shca->eq.is_initialized)
-                       ehca_tasklet_eq((unsigned long)(void*)shca);
+               if (shca->eq.is_initialized) {
+                       /* call deadman proc only if eq ptr does not change */
+                       struct ehca_eq *eq = &shca->eq;
+                       int max = 3;
+                       volatile u64 q_ofs, q_ofs2;
+                       u64 flags;
+                       spin_lock_irqsave(&eq->spinlock, flags);
+                       q_ofs = eq->ipz_queue.current_q_offset;
+                       spin_unlock_irqrestore(&eq->spinlock, flags);
+                       do {
+                               spin_lock_irqsave(&eq->spinlock, flags);
+                               q_ofs2 = eq->ipz_queue.current_q_offset;
+                               spin_unlock_irqrestore(&eq->spinlock, flags);
+                               max--;
+                       } while (q_ofs == q_ofs2 && max > 0);
+                       if (q_ofs == q_ofs2)
+                               ehca_process_eq(shca, 0);
+               }
        }
        mod_timer(&poll_eqs_timer, jiffies + HZ);
        spin_unlock(&shca_list_lock);
@@ -790,7 +811,7 @@ int __init ehca_module_init(void)
        int ret;
 
        printk(KERN_INFO "eHCA Infiniband Device Driver "
-                        "(Rel.: SVNEHCA_0020)\n");
+              "(Rel.: SVNEHCA_0022)\n");
        idr_init(&ehca_qp_idr);
        idr_init(&ehca_cq_idr);
        spin_lock_init(&ehca_qp_idr_lock);