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From: Kevin Laatz <kevin.laatz@intel.com>
To: dev@dpdk.org
Cc: bruce.richardson@intel.com,
Kevin Laatz <kevin.laatz@intel.com>
Date: Fri, 28 May 2021 14:55:59 +0100
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Subject: [dpdk-dev] [PATCH v3 2/2] raw/ioat: add device reset to python
script
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Currently once a device is configured, the user does not have the ability
to reset the device via the script.
This patch adds a device reset option to the script. For example
"$dpdk_idxd_cfg.py 0 --reset" would reset device 0.
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
v3: remove printing if the script running config or reset
---
drivers/raw/ioat/dpdk_idxd_cfg.py | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/raw/ioat/dpdk_idxd_cfg.py b/drivers/raw/ioat/dpdk_idxd_cfg.py
index ad8393a645..83ef4817db 100755
--- a/drivers/raw/ioat/dpdk_idxd_cfg.py
+++ b/drivers/raw/ioat/dpdk_idxd_cfg.py
@@ -29,6 +29,12 @@ def write_values(self, values):
f.write(str(contents))
+def reset_device(dsa_id):
+ "Reset the DSA device and all its queues"
+ drv_dir = SysfsDir("/sys/bus/dsa/drivers/dsa")
+ drv_dir.write_values({"unbind": f"dsa{dsa_id}"})
+
+
def get_pci_dir(pci):
"Search for the sysfs directory of the PCI device"
base_dir = '/sys/bus/pci/devices/'
@@ -95,11 +101,16 @@ def main(args):
arg_p.add_argument('--name-prefix', metavar='prefix', dest='prefix',
default="dpdk",
help="Prefix for workqueue name to mark for DPDK use [default: 'dpdk']")
+ arg_p.add_argument('--reset', action='store_true',
+ help="Reset DSA device and its queues")
parsed_args = arg_p.parse_args(args[1:])
dsa_id = parsed_args.dsa_id
dsa_id = get_dsa_id(dsa_id) if ':' in dsa_id else dsa_id
- configure_dsa(dsa_id, parsed_args.q, parsed_args.prefix)
+ if parsed_args.reset:
+ reset_device(dsa_id)
+ else:
+ configure_dsa(dsa_id, parsed_args.q, parsed_args.prefix)
if __name__ == "__main__":
--
2.30.2