diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch b/target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch new file mode 100644 index 0000000000..a137e55e96 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch @@ -0,0 +1,71 @@ +From d43acc10c25f01a461a1cb1c1fd0cc72cd29dd42 Mon Sep 17 00:00:00 2001 +From: Laurentiu Tudor <laurentiu.tudor@nxp.com> +Date: Thu, 2 Aug 2018 16:14:12 +0300 +Subject: [PATCH] soc/fsl/qbman_portals: add APIs to retrieve the probing + status + +Add a couple of new APIs to check the probing status of the required +cpu bound qman and bman portals: + 'int bman_portals_probed()' and 'int qman_portals_probed()'. +They return the following values. + * 1 if qman/bman portals were all probed correctly + * 0 if qman/bman portals were not yet probed + * -1 if probing of qman/bman portals failed +Portals are considered successful probed if no error occurred during +the probing of any of the portals and if enough portals were probed +to have one available for each cpu. +The error handling paths were slightly rearranged in order to fit this +new functionality without being too intrusive. +Drivers that use qman/bman portal driver services are required to use +these APIs before calling any functions exported by these drivers or +otherwise they will crash the kernel. +First user will be the dpaa1 ethernet driver, coming in a subsequent +patch. + +Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> +--- + drivers/soc/fsl/qbman/bman_portal.c | 3 +++ + drivers/soc/fsl/qbman/qman_portal.c | 3 +++ + include/soc/fsl/qman.h | 9 +++++++++ + 3 files changed, 15 insertions(+) + +--- a/drivers/soc/fsl/qbman/bman_portal.c ++++ b/drivers/soc/fsl/qbman/bman_portal.c +@@ -164,6 +164,9 @@ static int bman_portal_probe(struct plat + } + + cpumask_set_cpu(cpu, &portal_cpus); ++ if (!__bman_portals_probed && ++ cpumask_weight(&portal_cpus) == num_online_cpus()) ++ __bman_portals_probed = 1; + spin_unlock(&bman_lock); + pcfg->cpu = cpu; + +--- a/drivers/soc/fsl/qbman/qman_portal.c ++++ b/drivers/soc/fsl/qbman/qman_portal.c +@@ -323,6 +323,9 @@ static int qman_portal_probe(struct plat + } + + cpumask_set_cpu(cpu, &portal_cpus); ++ if (!__qman_portals_probed && ++ cpumask_weight(&portal_cpus) == num_online_cpus()) ++ __qman_portals_probed = 1; + spin_unlock(&qman_lock); + pcfg->cpu = cpu; + +--- a/include/soc/fsl/qman.h ++++ b/include/soc/fsl/qman.h +@@ -1235,4 +1235,13 @@ void qman_portal_get_iperiod(struct qman + */ + int qman_portal_set_iperiod(struct qman_portal *portal, u32 iperiod); + ++/** ++ * qman_portals_probed - Check if all cpu bound qman portals are probed ++ * ++ * Returns 1 if all the required cpu bound qman portals successfully probed, ++ * -1 if probe errors appeared or 0 if the qman portals did not yet finished ++ * probing. ++ */ ++int qman_portals_probed(void); ++ + #endif /* __FSL_QMAN_H */ |