From: Sean Anderson <sean.anderson@seco.com>
Date: Fri, 2 Sep 2022 21:57:35 +0000 (-0400)
Subject: soc: fsl: qbman: Add CGR update function
X-Git-Tag: v6.6.17~6504^2~258^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=914f8b228ede709274b8c80514b352248ec9da00;p=platform%2Fkernel%2Flinux-rpi.git

soc: fsl: qbman: Add CGR update function

This adds a function to update a CGR with new parameters. qman_create_cgr
can almost be used for this (with flags=0), but it's not suitable because
it also registers the callback function. The _safe variant was modeled off
of qman_cgr_delete_safe. However, we handle multiple arguments and a return
value.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Acked-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index eb6600a..739e4ee 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -2568,6 +2568,54 @@ void qman_delete_cgr_safe(struct qman_cgr *cgr)
 }
 EXPORT_SYMBOL(qman_delete_cgr_safe);
 
+static int qman_update_cgr(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts)
+{
+	int ret;
+	unsigned long irqflags;
+	struct qman_portal *p = qman_cgr_get_affine_portal(cgr);
+
+	if (!p)
+		return -EINVAL;
+
+	spin_lock_irqsave(&p->cgr_lock, irqflags);
+	ret = qm_modify_cgr(cgr, 0, opts);
+	spin_unlock_irqrestore(&p->cgr_lock, irqflags);
+	put_affine_portal();
+	return ret;
+}
+
+struct update_cgr_params {
+	struct qman_cgr *cgr;
+	struct qm_mcc_initcgr *opts;
+	int ret;
+};
+
+static void qman_update_cgr_smp_call(void *p)
+{
+	struct update_cgr_params *params = p;
+
+	params->ret = qman_update_cgr(params->cgr, params->opts);
+}
+
+int qman_update_cgr_safe(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts)
+{
+	struct update_cgr_params params = {
+		.cgr = cgr,
+		.opts = opts,
+	};
+
+	preempt_disable();
+	if (qman_cgr_cpus[cgr->cgrid] != smp_processor_id())
+		smp_call_function_single(qman_cgr_cpus[cgr->cgrid],
+					 qman_update_cgr_smp_call, &params,
+					 true);
+	else
+		params.ret = qman_update_cgr(cgr, opts);
+	preempt_enable();
+	return params.ret;
+}
+EXPORT_SYMBOL(qman_update_cgr_safe);
+
 /* Cleanup FQs */
 
 static int _qm_mr_consume_and_match_verb(struct qm_portal *p, int v)
diff --git a/include/soc/fsl/qman.h b/include/soc/fsl/qman.h
index 59eeba3..0d3d6be 100644
--- a/include/soc/fsl/qman.h
+++ b/include/soc/fsl/qman.h
@@ -1172,6 +1172,15 @@ int qman_delete_cgr(struct qman_cgr *cgr);
 void qman_delete_cgr_safe(struct qman_cgr *cgr);
 
 /**
+ * qman_update_cgr_safe - Modifies a congestion group object from any CPU
+ * @cgr: the 'cgr' object to modify
+ * @opts: state of the CGR settings
+ *
+ * This will select the proper CPU and modify the CGR settings.
+ */
+int qman_update_cgr_safe(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts);
+
+/**
  * qman_query_cgr_congested - Queries CGR's congestion status
  * @cgr: the 'cgr' object to query
  * @result: returns 'cgr's congestion status, 1 (true) if congested