X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=drivers%2Fptp%2Fptp_clock.c;h=4dfc52e06704117da71d836d3fc6a18f7ec4ae4f;hb=d842bc6c0579ca7643eed029beabab3ac562a335;hp=a23a37a4d5dc345f28691cf470bdcadb8e3487ba;hpb=b0dfd9af28b60d7ec42c359ae84c1ba97e093100;p=linux-2.6-microblaze.git

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index a23a37a4d5dc..4dfc52e06704 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -24,10 +24,11 @@
 #define PTP_PPS_EVENT PPS_CAPTUREASSERT
 #define PTP_PPS_MODE (PTP_PPS_DEFAULTS | PPS_CANWAIT | PPS_TSFMT_TSPEC)
 
+struct class *ptp_class;
+
 /* private globals */
 
 static dev_t ptp_devt;
-static struct class *ptp_class;
 
 static DEFINE_IDA(ptp_clocks_map);
 
@@ -76,6 +77,11 @@ static int ptp_clock_settime(struct posix_clock *pc, const struct timespec64 *tp
 {
 	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
 
+	if (ptp_vclock_in_use(ptp)) {
+		pr_err("ptp: virtual clock in use\n");
+		return -EBUSY;
+	}
+
 	return  ptp->info->settime64(ptp->info, tp);
 }
 
@@ -97,6 +103,11 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
 	struct ptp_clock_info *ops;
 	int err = -EOPNOTSUPP;
 
+	if (ptp_vclock_in_use(ptp)) {
+		pr_err("ptp: virtual clock in use\n");
+		return -EBUSY;
+	}
+
 	ops = ptp->info;
 
 	if (tx->modes & ADJ_SETOFFSET) {
@@ -161,6 +172,7 @@ static void ptp_clock_release(struct device *dev)
 	ptp_cleanup_pin_groups(ptp);
 	mutex_destroy(&ptp->tsevq_mux);
 	mutex_destroy(&ptp->pincfg_mux);
+	mutex_destroy(&ptp->n_vclocks_mux);
 	ida_simple_remove(&ptp_clocks_map, ptp->index);
 	kfree(ptp);
 }
@@ -185,6 +197,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 {
 	struct ptp_clock *ptp;
 	int err = 0, index, major = MAJOR(ptp_devt);
+	size_t size;
 
 	if (info->n_alarm > PTP_MAX_ALARMS)
 		return ERR_PTR(-EINVAL);
@@ -208,6 +221,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 	spin_lock_init(&ptp->tsevq.lock);
 	mutex_init(&ptp->tsevq_mux);
 	mutex_init(&ptp->pincfg_mux);
+	mutex_init(&ptp->n_vclocks_mux);
 	init_waitqueue_head(&ptp->tsev_wq);
 
 	if (ptp->info->do_aux_work) {
@@ -218,7 +232,22 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 			pr_err("failed to create ptp aux_worker %d\n", err);
 			goto kworker_err;
 		}
-		ptp->pps_source->lookup_cookie = ptp;
+	}
+
+	/* PTP virtual clock is being registered under physical clock */
+	if (parent && parent->class && parent->class->name &&
+	    strcmp(parent->class->name, "ptp") == 0)
+		ptp->is_virtual_clock = true;
+
+	if (!ptp->is_virtual_clock) {
+		ptp->max_vclocks = PTP_DEFAULT_MAX_VCLOCKS;
+
+		size = sizeof(int) * ptp->max_vclocks;
+		ptp->vclock_index = kzalloc(size, GFP_KERNEL);
+		if (!ptp->vclock_index) {
+			err = -ENOMEM;
+			goto no_mem_for_vclocks;
+		}
 	}
 
 	err = ptp_populate_pin_groups(ptp);
@@ -238,6 +267,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 			pr_err("failed to register pps source\n");
 			goto no_pps;
 		}
+		ptp->pps_source->lookup_cookie = ptp;
 	}
 
 	/* Initialize a new device of our class in our clock structure. */
@@ -265,11 +295,14 @@ no_clock:
 no_pps:
 	ptp_cleanup_pin_groups(ptp);
 no_pin_groups:
+	kfree(ptp->vclock_index);
+no_mem_for_vclocks:
 	if (ptp->kworker)
 		kthread_destroy_worker(ptp->kworker);
 kworker_err:
 	mutex_destroy(&ptp->tsevq_mux);
 	mutex_destroy(&ptp->pincfg_mux);
+	mutex_destroy(&ptp->n_vclocks_mux);
 	ida_simple_remove(&ptp_clocks_map, index);
 no_slot:
 	kfree(ptp);
@@ -280,9 +313,16 @@ EXPORT_SYMBOL(ptp_clock_register);
 
 int ptp_clock_unregister(struct ptp_clock *ptp)
 {
+	if (ptp_vclock_in_use(ptp)) {
+		pr_err("ptp: virtual clock in use\n");
+		return -EBUSY;
+	}
+
 	ptp->defunct = 1;
 	wake_up_interruptible(&ptp->tsev_wq);
 
+	kfree(ptp->vclock_index);
+
 	if (ptp->kworker) {
 		kthread_cancel_delayed_work_sync(&ptp->aux_work);
 		kthread_destroy_worker(ptp->kworker);