add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/arch/powerpc/include/asm/dbell.h
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@@ -1,10 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Copyright 2009 Freescale Semiconductor, Inc.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  *
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  * provides masks and opcode images for use by code generation, emulation
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  * and for instructions that older assemblers might not know about
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@@ -15,8 +11,10 @@
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 #include <linux/smp.h>
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 #include <linux/threads.h>
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+#include <asm/cputhreads.h>
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 #include <asm/ppc-opcode.h>
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 #include <asm/feature-fixups.h>
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+#include <asm/kvm_ppc.h>
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 #define PPC_DBELL_MSG_BRDCAST	(0x04000000)
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 #define PPC_DBELL_TYPE(x)	(((x) & 0xf) << (63-36))
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@@ -91,9 +89,6 @@
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 #endif /* CONFIG_PPC_BOOK3S */
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-extern void doorbell_global_ipi(int cpu);
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-extern void doorbell_core_ipi(int cpu);
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-extern int doorbell_try_core_ipi(int cpu);
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 extern void doorbell_exception(struct pt_regs *regs);
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 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
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@@ -104,4 +99,63 @@
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 	_ppc_msgsnd(msg);
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 }
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+#ifdef CONFIG_SMP
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+
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+/*
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+ * Doorbells must only be used if CPU_FTR_DBELL is available.
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+ * msgsnd is used in HV, and msgsndp is used in !HV.
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+ *
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+ * These should be used by platform code that is aware of restrictions.
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+ * Other arch code should use ->cause_ipi.
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+ *
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+ * doorbell_global_ipi() sends a dbell to any target CPU.
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+ * Must be used only by architectures that address msgsnd target
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+ * by PIR/get_hard_smp_processor_id.
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+ */
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+static inline void doorbell_global_ipi(int cpu)
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+{
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+	u32 tag = get_hard_smp_processor_id(cpu);
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+
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+	kvmppc_set_host_ipi(cpu);
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+	/* Order previous accesses vs. msgsnd, which is treated as a store */
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+	ppc_msgsnd_sync();
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+	ppc_msgsnd(PPC_DBELL_MSGTYPE, 0, tag);
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+}
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+
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+/*
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+ * doorbell_core_ipi() sends a dbell to a target CPU in the same core.
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+ * Must be used only by architectures that address msgsnd target
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+ * by TIR/cpu_thread_in_core.
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+ */
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+static inline void doorbell_core_ipi(int cpu)
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+{
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+	u32 tag = cpu_thread_in_core(cpu);
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+
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+	kvmppc_set_host_ipi(cpu);
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+	/* Order previous accesses vs. msgsnd, which is treated as a store */
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+	ppc_msgsnd_sync();
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+	ppc_msgsnd(PPC_DBELL_MSGTYPE, 0, tag);
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+}
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+
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+/*
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+ * Attempt to cause a core doorbell if destination is on the same core.
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+ * Returns 1 on success, 0 on failure.
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+ */
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+static inline int doorbell_try_core_ipi(int cpu)
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+{
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+	int this_cpu = get_cpu();
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+	int ret = 0;
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+
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+	if (cpumask_test_cpu(cpu, cpu_sibling_mask(this_cpu))) {
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+		doorbell_core_ipi(cpu);
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+		ret = 1;
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+	}
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+
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+	put_cpu();
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+
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+	return ret;
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+}
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+
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+#endif /* CONFIG_SMP */
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+
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 #endif /* _ASM_POWERPC_DBELL_H */