diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index e520929ac5019d4afaf139873b835c25ff6c60b5..07aa76a74f642832560c23462b09e62e938bb1b9 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -6410,18 +6410,17 @@ static void lcb_shutdown(struct hfi1_devdata *dd, int abort)
*
* The expectation is that the caller of this routine would have taken
* care of properly transitioning the link into the correct state.
+ * NOTE: the caller needs to acquire the dd->dc8051_lock lock
+ * before calling this function.
*/
-static void dc_shutdown(struct hfi1_devdata *dd)
+static void _dc_shutdown(struct hfi1_devdata *dd)
{
- unsigned long flags;
+ lockdep_assert_held(&dd->dc8051_lock);
- spin_lock_irqsave(&dd->dc8051_lock, flags);
- if (dd->dc_shutdown) {
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ if (dd->dc_shutdown)
return;
- }
+
dd->dc_shutdown = 1;
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
/* Shutdown the LCB */
lcb_shutdown(dd, 1);
/*
@@ -6432,35 +6431,45 @@ static void dc_shutdown(struct hfi1_devdata *dd)
write_csr(dd, DC_DC8051_CFG_RST, 0x1);
}
+static void dc_shutdown(struct hfi1_devdata *dd)
+{
+ mutex_lock(&dd->dc8051_lock);
+ _dc_shutdown(dd);
+ mutex_unlock(&dd->dc8051_lock);
+}
+
/*
* Calling this after the DC has been brought out of reset should not
* do any damage.
+ * NOTE: the caller needs to acquire the dd->dc8051_lock lock
+ * before calling this function.
*/
-static void dc_start(struct hfi1_devdata *dd)
+static void _dc_start(struct hfi1_devdata *dd)
{
- unsigned long flags;
- int ret;
+ lockdep_assert_held(&dd->dc8051_lock);
- spin_lock_irqsave(&dd->dc8051_lock, flags);
if (!dd->dc_shutdown)
- goto done;
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ return;
+
/* Take the 8051 out of reset */
write_csr(dd, DC_DC8051_CFG_RST, 0ull);
/* Wait until 8051 is ready */
- ret = wait_fm_ready(dd, TIMEOUT_8051_START);
- if (ret) {
+ if (wait_fm_ready(dd, TIMEOUT_8051_START))
dd_dev_err(dd, "%s: timeout starting 8051 firmware\n",
__func__);
- }
+
/* Take away reset for LCB and RX FPE (set in lcb_shutdown). */
write_csr(dd, DCC_CFG_RESET, 0x10);
/* lcb_shutdown() with abort=1 does not restore these */
write_csr(dd, DC_LCB_ERR_EN, dd->lcb_err_en);
- spin_lock_irqsave(&dd->dc8051_lock, flags);
dd->dc_shutdown = 0;
-done:
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+}
+
+static void dc_start(struct hfi1_devdata *dd)
+{
+ mutex_lock(&dd->dc8051_lock);
+ _dc_start(dd);
+ mutex_unlock(&dd->dc8051_lock);
}
/*
@@ -8513,16 +8522,11 @@ static int do_8051_command(
{
u64 reg, completed;
int return_code;
- unsigned long flags;
unsigned long timeout;
hfi1_cdbg(DC8051, "type %d, data 0x%012llx", type, in_data);
- /*
- * Alternative to holding the lock for a long time:
- * - keep busy wait - have other users bounce off
- */
- spin_lock_irqsave(&dd->dc8051_lock, flags);
+ mutex_lock(&dd->dc8051_lock);
/* We can't send any commands to the 8051 if it's in reset */
if (dd->dc_shutdown) {
@@ -8548,10 +8552,8 @@ static int do_8051_command(
return_code = -ENXIO;
goto fail;
}
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
- dc_shutdown(dd);
- dc_start(dd);
- spin_lock_irqsave(&dd->dc8051_lock, flags);
+ _dc_shutdown(dd);
+ _dc_start(dd);
}
/*
@@ -8632,8 +8634,7 @@ static int do_8051_command(
write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, 0);
fail:
- spin_unlock_irqrestore(&dd->dc8051_lock, flags);
-
+ mutex_unlock(&dd->dc8051_lock);
return return_code;
}
@@ -12007,6 +12008,10 @@ static void free_cntrs(struct hfi1_devdata *dd)
dd->scntrs = NULL;
kfree(dd->cntrnames);
dd->cntrnames = NULL;
+ if (dd->update_cntr_wq) {
+ destroy_workqueue(dd->update_cntr_wq);
+ dd->update_cntr_wq = NULL;
+ }
}
static u64 read_dev_port_cntr(struct hfi1_devdata *dd, struct cntr_entry *entry,
@@ -12162,7 +12167,7 @@ u64 write_port_cntr(struct hfi1_pportdata *ppd, int index, int vl, u64 data)
return write_dev_port_cntr(ppd->dd, entry, sval, ppd, vl, data);
}
-static void update_synth_timer(unsigned long opaque)
+static void do_update_synth_timer(struct work_struct *work)
{
u64 cur_tx;
u64 cur_rx;
@@ -12171,8 +12176,8 @@ static void update_synth_timer(unsigned long opaque)
int i, j, vl;
struct hfi1_pportdata *ppd;
struct cntr_entry *entry;
-
- struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+ struct hfi1_devdata *dd = container_of(work, struct hfi1_devdata,
+ update_cntr_work);
/*
* Rather than keep beating on the CSRs pick a minimal set that we can
@@ -12255,7 +12260,13 @@ static void update_synth_timer(unsigned long opaque)
} else {
hfi1_cdbg(CNTR, "[%d] No update necessary", dd->unit);
}
+}
+static void update_synth_timer(unsigned long opaque)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+
+ queue_work(dd->update_cntr_wq, &dd->update_cntr_work);
mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
}
@@ -12491,6 +12502,13 @@ static int init_cntrs(struct hfi1_devdata *dd)
if (init_cpu_counters(dd))
goto bail;
+ dd->update_cntr_wq = alloc_ordered_workqueue("hfi1_update_cntr_%d",
+ WQ_MEM_RECLAIM, dd->unit);
+ if (!dd->update_cntr_wq)
+ goto bail;
+
+ INIT_WORK(&dd->update_cntr_work, do_update_synth_timer);
+
mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
return 0;
bail:
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 550116fd9d48dd3a8071b02e59d8c53977d93c09..d253ea2521a0960e757d3071ab492fd9bfed1d1e 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -484,7 +484,7 @@ struct rvt_sge_state;
#define HFI1_PART_ENFORCE_OUT 0x2
/* how often we check for synthetic counter wrap around */
-#define SYNTH_CNT_TIME 2
+#define SYNTH_CNT_TIME 3
/* Counter flags */
#define CNTR_NORMAL 0x0 /* Normal counters, just read register */
@@ -962,8 +962,9 @@ struct hfi1_devdata {
spinlock_t rcvctrl_lock; /* protect changes to RcvCtrl */
/* around rcd and (user ctxts) ctxt_cnt use (intr vs free) */
spinlock_t uctxt_lock; /* rcd and user context changes */
- /* exclusive access to 8051 */
- spinlock_t dc8051_lock;
+ struct mutex dc8051_lock; /* exclusive access to 8051 */
+ struct workqueue_struct *update_cntr_wq;
+ struct work_struct update_cntr_work;
/* exclusive access to 8051 memory */
spinlock_t dc8051_memlock;
int dc8051_timed_out; /* remember if the 8051 timed out */
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index b4c7e04f45780143dfd09c591e44ffb7f0abb930..21dca7ac059ca77313b694db5cbf3bdefa252e25 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1081,11 +1081,11 @@ struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra)
spin_lock_init(&dd->uctxt_lock);
spin_lock_init(&dd->hfi1_diag_trans_lock);
spin_lock_init(&dd->sc_init_lock);
- spin_lock_init(&dd->dc8051_lock);
spin_lock_init(&dd->dc8051_memlock);
seqlock_init(&dd->sc2vl_lock);
spin_lock_init(&dd->sde_map_lock);
spin_lock_init(&dd->pio_map_lock);
+ mutex_init(&dd->dc8051_lock);
init_waitqueue_head(&dd->event_queue);
dd->int_counter = alloc_percpu(u64);