target/linux/layerscape/patches-5.4/701-net-0005-soc-fsl-qbman_portals-add-APIs-to-retrieve-the-probi.patch

   1 From d43acc10c25f01a461a1cb1c1fd0cc72cd29dd42 Mon Sep 17 00:00:00 2001
   2 From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
   3 Date: Thu, 2 Aug 2018 16:14:12 +0300
   4 Subject: [PATCH] soc/fsl/qbman_portals: add APIs to retrieve the probing
   5  status
   6
   7 Add a couple of new APIs to check the probing status of the required
   8 cpu bound qman and bman portals:
   9  'int bman_portals_probed()' and 'int qman_portals_probed()'.
  10 They return the following values.
  11  *  1 if qman/bman portals were all probed correctly
  12  *  0 if qman/bman portals were not yet probed
  13  * -1 if probing of qman/bman portals failed
  14 Portals are considered successful probed if no error occurred during
  15 the probing of any of the portals and if enough portals were probed
  16 to have one available for each cpu.
  17 The error handling paths were slightly rearranged in order to fit this
  18 new functionality without being too intrusive.
  19 Drivers that use qman/bman portal driver services are required to use
  20 these APIs before calling any functions exported by these drivers or
  21 otherwise they will crash the kernel.
  22 First user will be the dpaa1 ethernet driver, coming in a subsequent
  23 patch.
  24
  25 Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
  26 ---
  27  drivers/soc/fsl/qbman/bman_portal.c | 3 +++
  28  drivers/soc/fsl/qbman/qman_portal.c | 3 +++
  29  include/soc/fsl/qman.h              | 9 +++++++++
  30  3 files changed, 15 insertions(+)
  31
  32 --- a/drivers/soc/fsl/qbman/bman_portal.c
  33 +++ b/drivers/soc/fsl/qbman/bman_portal.c
  34 @@ -164,6 +164,9 @@ static int bman_portal_probe(struct plat
  35         }
  36
  37         cpumask_set_cpu(cpu, &portal_cpus);
  38 +       if (!__bman_portals_probed &&
  39 +           cpumask_weight(&portal_cpus) == num_online_cpus())
  40 +               __bman_portals_probed = 1;
  41         spin_unlock(&bman_lock);
  42         pcfg->cpu = cpu;
  43
  44 --- a/drivers/soc/fsl/qbman/qman_portal.c
  45 +++ b/drivers/soc/fsl/qbman/qman_portal.c
  46 @@ -323,6 +323,9 @@ static int qman_portal_probe(struct plat
  47         }
  48
  49         cpumask_set_cpu(cpu, &portal_cpus);
  50 +       if (!__qman_portals_probed &&
  51 +           cpumask_weight(&portal_cpus) == num_online_cpus())
  52 +               __qman_portals_probed = 1;
  53         spin_unlock(&qman_lock);
  54         pcfg->cpu = cpu;
  55
  56 --- a/include/soc/fsl/qman.h
  57 +++ b/include/soc/fsl/qman.h
  58 @@ -1235,4 +1235,13 @@ void qman_portal_get_iperiod(struct qman
  59   */
  60  int qman_portal_set_iperiod(struct qman_portal *portal, u32 iperiod);
  61
  62 +/**
  63 + * qman_portals_probed - Check if all cpu bound qman portals are probed
  64 + *
  65 + * Returns 1 if all the required cpu bound qman portals successfully probed,
  66 + * -1 if probe errors appeared or 0 if the qman portals did not yet finished
  67 + * probing.
  68 + */
  69 +int qman_portals_probed(void);
  70 +
  71  #endif /* __FSL_QMAN_H */