diff options
| author | Hoang-Nam Nguyen <hnguyen@linux.vnet.ibm.com> | 2007-02-15 17:06:33 +0100 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-02-16 13:57:34 -0800 |
| commit | 78d8d5f9ef8d6179e92b94481cfdfc45d396992f (patch) | |
| tree | 55ee3cecd4c0d59f418b59870cec2ac33b1b70e7 /drivers/infiniband/hw/ehca/ehca_main.c | |
| parent | 551fd6122d247d76124c4fdb6eb898cc8e3d74aa (diff) | |
IB/ehca: Rework irq handler
Rework ehca interrupt handling to avoid/reduce missed irq events.
Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_main.c')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_main.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c index 1155bcf4821..57905342147 100644 --- 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_0021"); int ehca_open_aqp1 = 0; int ehca_debug_level = 0; @@ -432,8 +432,8 @@ 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, @@ -778,8 +778,24 @@ 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 +806,7 @@ int __init ehca_module_init(void) int ret; printk(KERN_INFO "eHCA Infiniband Device Driver " - "(Rel.: SVNEHCA_0020)\n"); + "(Rel.: SVNEHCA_0021)\n"); idr_init(&ehca_qp_idr); idr_init(&ehca_cq_idr); spin_lock_init(&ehca_qp_idr_lock); |