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72 lines
2.5 KiB
Diff
72 lines
2.5 KiB
Diff
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From d43acc10c25f01a461a1cb1c1fd0cc72cd29dd42 Mon Sep 17 00:00:00 2001
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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Date: Thu, 2 Aug 2018 16:14:12 +0300
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Subject: [PATCH] soc/fsl/qbman_portals: add APIs to retrieve the probing
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status
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Add a couple of new APIs to check the probing status of the required
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cpu bound qman and bman portals:
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'int bman_portals_probed()' and 'int qman_portals_probed()'.
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They return the following values.
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* 1 if qman/bman portals were all probed correctly
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* 0 if qman/bman portals were not yet probed
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* -1 if probing of qman/bman portals failed
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Portals are considered successful probed if no error occurred during
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the probing of any of the portals and if enough portals were probed
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to have one available for each cpu.
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The error handling paths were slightly rearranged in order to fit this
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new functionality without being too intrusive.
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Drivers that use qman/bman portal driver services are required to use
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these APIs before calling any functions exported by these drivers or
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otherwise they will crash the kernel.
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First user will be the dpaa1 ethernet driver, coming in a subsequent
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patch.
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Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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---
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drivers/soc/fsl/qbman/bman_portal.c | 3 +++
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drivers/soc/fsl/qbman/qman_portal.c | 3 +++
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include/soc/fsl/qman.h | 9 +++++++++
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3 files changed, 15 insertions(+)
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--- a/drivers/soc/fsl/qbman/bman_portal.c
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+++ b/drivers/soc/fsl/qbman/bman_portal.c
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@@ -164,6 +164,9 @@ static int bman_portal_probe(struct plat
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}
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cpumask_set_cpu(cpu, &portal_cpus);
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+ if (!__bman_portals_probed &&
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+ cpumask_weight(&portal_cpus) == num_online_cpus())
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+ __bman_portals_probed = 1;
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spin_unlock(&bman_lock);
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pcfg->cpu = cpu;
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--- a/drivers/soc/fsl/qbman/qman_portal.c
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+++ b/drivers/soc/fsl/qbman/qman_portal.c
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@@ -323,6 +323,9 @@ static int qman_portal_probe(struct plat
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}
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cpumask_set_cpu(cpu, &portal_cpus);
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+ if (!__qman_portals_probed &&
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+ cpumask_weight(&portal_cpus) == num_online_cpus())
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+ __qman_portals_probed = 1;
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spin_unlock(&qman_lock);
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pcfg->cpu = cpu;
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--- a/include/soc/fsl/qman.h
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+++ b/include/soc/fsl/qman.h
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@@ -1235,4 +1235,13 @@ void qman_portal_get_iperiod(struct qman
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*/
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int qman_portal_set_iperiod(struct qman_portal *portal, u32 iperiod);
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+/**
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+ * qman_portals_probed - Check if all cpu bound qman portals are probed
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+ *
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+ * Returns 1 if all the required cpu bound qman portals successfully probed,
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+ * -1 if probe errors appeared or 0 if the qman portals did not yet finished
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+ * probing.
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+ */
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+int qman_portals_probed(void);
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+
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#endif /* __FSL_QMAN_H */
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