diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c index 072612263dab..b1dd13ff282b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_resource.c @@ -250,6 +250,51 @@ void nfp_resource_release(struct nfp_resource *res) } /** + * nfp_resource_wait() - Wait for resource to appear + * @cpp: NFP CPP handle + * @name: Name of the resource + * @secs: Number of seconds to wait + * + * Wait for resource to appear in the resource table, grab and release + * its lock. The wait is jiffies-based, don't expect fine granularity. + * + * Return: 0 on success, errno otherwise. + */ +int nfp_resource_wait(struct nfp_cpp *cpp, const char *name, unsigned int secs) +{ + unsigned long warn_at = jiffies + NFP_MUTEX_WAIT_FIRST_WARN * HZ; + unsigned long err_at = jiffies + secs * HZ; + struct nfp_resource *res; + + while (true) { + res = nfp_resource_acquire(cpp, name); + if (!IS_ERR(res)) { + nfp_resource_release(res); + return 0; + } + + if (PTR_ERR(res) != -ENOENT) { + nfp_err(cpp, "error waiting for resource %s: %ld\n", + name, PTR_ERR(res)); + return PTR_ERR(res); + } + if (time_is_before_eq_jiffies(err_at)) { + nfp_err(cpp, "timeout waiting for resource %s\n", name); + return -ETIMEDOUT; + } + if (time_is_before_eq_jiffies(warn_at)) { + warn_at = jiffies + NFP_MUTEX_WAIT_NEXT_WARN * HZ; + nfp_info(cpp, "waiting for NFP resource %s\n", name); + } + if (msleep_interruptible(10)) { + nfp_err(cpp, "wait for resource %s interrupted\n", + name); + return -ERESTARTSYS; + } + } +} + +/** * nfp_resource_cpp_id() - Return the cpp_id of a resource handle * @res: NFP Resource handle * |