add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/ethernet/sfc/net_driver.h
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@@ -627,12 +627,54 @@
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 #define EFX_INT_MODE_USE_MSI(x) (((x)->interrupt_mode) <= EFX_INT_MODE_MSI)
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 enum nic_state {
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-	STATE_UNINIT = 0,	/* device being probed/removed or is frozen */
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-	STATE_READY = 1,	/* hardware ready and netdev registered */
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-	STATE_DISABLED = 2,	/* device disabled due to hardware errors */
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-	STATE_RECOVERY = 3,	/* device recovering from PCI error */
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+	STATE_UNINIT = 0,	/* device being probed/removed */
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+	STATE_NET_DOWN,		/* hardware probed and netdev registered */
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+	STATE_NET_UP,		/* ready for traffic */
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+	STATE_DISABLED,		/* device disabled due to hardware errors */
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+
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+	STATE_RECOVERY = 0x100,/* recovering from PCI error */
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+	STATE_FROZEN = 0x200,	/* frozen by power management */
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 };
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+static inline bool efx_net_active(enum nic_state state)
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+{
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+	return state == STATE_NET_DOWN || state == STATE_NET_UP;
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+}
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+
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+static inline bool efx_frozen(enum nic_state state)
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+{
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+	return state & STATE_FROZEN;
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+}
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+
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+static inline bool efx_recovering(enum nic_state state)
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+{
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+	return state & STATE_RECOVERY;
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+}
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+
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+static inline enum nic_state efx_freeze(enum nic_state state)
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+{
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+	WARN_ON(!efx_net_active(state));
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+	return state | STATE_FROZEN;
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+}
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+
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+static inline enum nic_state efx_thaw(enum nic_state state)
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+{
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+	WARN_ON(!efx_frozen(state));
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+	return state & ~STATE_FROZEN;
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+}
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+
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+static inline enum nic_state efx_recover(enum nic_state state)
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+{
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+	WARN_ON(!efx_net_active(state));
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+	return state | STATE_RECOVERY;
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+}
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+
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+static inline enum nic_state efx_recovered(enum nic_state state)
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+{
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+	WARN_ON(!efx_recovering(state));
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+	return state & ~STATE_RECOVERY;
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+}
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+
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 /* Forward declaration */
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 struct efx_nic;
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