4257c792a2
- Add sysfs interrupt to notify userspace app of external interrupt - Implement get_change_event() in chassis api.
53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
try:
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import select
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from .helper import APIHelper
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from sonic_py_common.logger import Logger
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except ImportError as e:
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raise ImportError(repr(e) + " - required module not found")
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class SfpEvent:
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''' Listen to insert/remove sfp events '''
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QSFP_MODPRS_IRQ = '/sys/devices/platform/dx010_cpld/qsfp_modprs_irq'
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GPIO_SUS6 = "/sys/devices/platform/slx-ich.0/sci_int_gpio_sus6"
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def __init__(self, sfp_list):
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self._api_helper = APIHelper()
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self._sfp_list = sfp_list
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self._logger = Logger()
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def get_sfp_event(self, timeout):
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epoll = select.epoll()
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port_dict = {}
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timeout_sec = timeout/1000
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try:
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# We get notified when there is an SCI interrupt from GPIO SUS6
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fd = open(self.GPIO_SUS6, "r")
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fd.read()
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epoll.register(fd.fileno(), select.EPOLLIN & select.EPOLLET)
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events = epoll.poll(timeout=timeout_sec if timeout != 0 else -1)
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if events:
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# Read the QSFP ABS interrupt & status registers
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port_changes = self._api_helper.read_one_line_file(
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self.QSFP_MODPRS_IRQ)
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changes = int(port_changes, 16)
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for sfp in self._sfp_list:
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change = (changes >> sfp.port_num-1) & 1
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if change == 1:
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port_dict[str(sfp.port_num)] = str(
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int(sfp.get_presence()))
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return port_dict
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except Exception as e:
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self._logger.log_error("Failed to detect SfpEvent - " + repr(e))
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return False
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finally:
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fd.close()
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epoll.close()
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return False
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