Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 240 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip27/ip27-nmi.c b/arch/mips/sgi-ip27/ip27-nmi.c
new file mode 100644
index 0000000000..84889b57d5
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-nmi.c
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/mmzone.h>
+#include <linux/nodemask.h>
+#include <linux/spinlock.h>
+#include <linux/smp.h>
+#include <linux/atomic.h>
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/nmi.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/agent.h>
+
+#if 0
+#define NODE_NUM_CPUS(n)	CNODE_NUM_CPUS(n)
+#else
+#define NODE_NUM_CPUS(n)	CPUS_PER_NODE
+#endif
+
+#define SEND_NMI(_nasid, _slice)	\
+	REMOTE_HUB_S((_nasid),  (PI_NMI_A + ((_slice) * PI_NMI_OFFSET)), 1)
+
+typedef unsigned long machreg_t;
+
+static arch_spinlock_t nmi_lock = __ARCH_SPIN_LOCK_UNLOCKED;
+
+/*
+ * Let's see what else we need to do here. Set up sp, gp?
+ */
+void nmi_dump(void)
+{
+	void cont_nmi_dump(void);
+
+	cont_nmi_dump();
+}
+
+void install_cpu_nmi_handler(int slice)
+{
+	nmi_t *nmi_addr;
+
+	nmi_addr = (nmi_t *)NMI_ADDR(get_nasid(), slice);
+	if (nmi_addr->call_addr)
+		return;
+	nmi_addr->magic = NMI_MAGIC;
+	nmi_addr->call_addr = (void *)nmi_dump;
+	nmi_addr->call_addr_c =
+		(void *)(~((unsigned long)(nmi_addr->call_addr)));
+	nmi_addr->call_parm = 0;
+}
+
+/*
+ * Copy the cpu registers which have been saved in the IP27prom format
+ * into the eframe format for the node under consideration.
+ */
+
+void nmi_cpu_eframe_save(nasid_t nasid, int slice)
+{
+	struct reg_struct *nr;
+	int		i;
+
+	/* Get the pointer to the current cpu's register set. */
+	nr = (struct reg_struct *)
+		(TO_UNCAC(TO_NODE(nasid, IP27_NMI_KREGS_OFFSET)) +
+		slice * IP27_NMI_KREGS_CPU_SIZE);
+
+	pr_emerg("NMI nasid %d: slice %d\n", nasid, slice);
+
+	/*
+	 * Saved main processor registers
+	 */
+	for (i = 0; i < 32; ) {
+		if ((i % 4) == 0)
+			pr_emerg("$%2d   :", i);
+		pr_cont(" %016lx", nr->gpr[i]);
+
+		i++;
+		if ((i % 4) == 0)
+			pr_cont("\n");
+	}
+
+	pr_emerg("Hi    : (value lost)\n");
+	pr_emerg("Lo    : (value lost)\n");
+
+	/*
+	 * Saved cp0 registers
+	 */
+	pr_emerg("epc   : %016lx %pS\n", nr->epc, (void *)nr->epc);
+	pr_emerg("%s\n", print_tainted());
+	pr_emerg("ErrEPC: %016lx %pS\n", nr->error_epc, (void *)nr->error_epc);
+	pr_emerg("ra    : %016lx %pS\n", nr->gpr[31], (void *)nr->gpr[31]);
+	pr_emerg("Status: %08lx	      ", nr->sr);
+
+	if (nr->sr & ST0_KX)
+		pr_cont("KX ");
+	if (nr->sr & ST0_SX)
+		pr_cont("SX ");
+	if (nr->sr & ST0_UX)
+		pr_cont("UX ");
+
+	switch (nr->sr & ST0_KSU) {
+	case KSU_USER:
+		pr_cont("USER ");
+		break;
+	case KSU_SUPERVISOR:
+		pr_cont("SUPERVISOR ");
+		break;
+	case KSU_KERNEL:
+		pr_cont("KERNEL ");
+		break;
+	default:
+		pr_cont("BAD_MODE ");
+		break;
+	}
+
+	if (nr->sr & ST0_ERL)
+		pr_cont("ERL ");
+	if (nr->sr & ST0_EXL)
+		pr_cont("EXL ");
+	if (nr->sr & ST0_IE)
+		pr_cont("IE ");
+	pr_cont("\n");
+
+	pr_emerg("Cause : %08lx\n", nr->cause);
+	pr_emerg("PrId  : %08x\n", read_c0_prid());
+	pr_emerg("BadVA : %016lx\n", nr->badva);
+	pr_emerg("CErr  : %016lx\n", nr->cache_err);
+	pr_emerg("NMI_SR: %016lx\n", nr->nmi_sr);
+
+	pr_emerg("\n");
+}
+
+void nmi_dump_hub_irq(nasid_t nasid, int slice)
+{
+	u64 mask0, mask1, pend0, pend1;
+
+	if (slice == 0) {				/* Slice A */
+		mask0 = REMOTE_HUB_L(nasid, PI_INT_MASK0_A);
+		mask1 = REMOTE_HUB_L(nasid, PI_INT_MASK1_A);
+	} else {					/* Slice B */
+		mask0 = REMOTE_HUB_L(nasid, PI_INT_MASK0_B);
+		mask1 = REMOTE_HUB_L(nasid, PI_INT_MASK1_B);
+	}
+
+	pend0 = REMOTE_HUB_L(nasid, PI_INT_PEND0);
+	pend1 = REMOTE_HUB_L(nasid, PI_INT_PEND1);
+
+	pr_emerg("PI_INT_MASK0: %16llx PI_INT_MASK1: %16llx\n", mask0, mask1);
+	pr_emerg("PI_INT_PEND0: %16llx PI_INT_PEND1: %16llx\n", pend0, pend1);
+	pr_emerg("\n\n");
+}
+
+/*
+ * Copy the cpu registers which have been saved in the IP27prom format
+ * into the eframe format for the node under consideration.
+ */
+void nmi_node_eframe_save(nasid_t nasid)
+{
+	int slice;
+
+	if (nasid == INVALID_NASID)
+		return;
+
+	/* Save the registers into eframe for each cpu */
+	for (slice = 0; slice < NODE_NUM_CPUS(slice); slice++) {
+		nmi_cpu_eframe_save(nasid, slice);
+		nmi_dump_hub_irq(nasid, slice);
+	}
+}
+
+/*
+ * Save the nmi cpu registers for all cpus in the system.
+ */
+void
+nmi_eframes_save(void)
+{
+	nasid_t nasid;
+
+	for_each_online_node(nasid)
+		nmi_node_eframe_save(nasid);
+}
+
+void
+cont_nmi_dump(void)
+{
+#ifndef REAL_NMI_SIGNAL
+	static atomic_t nmied_cpus = ATOMIC_INIT(0);
+
+	atomic_inc(&nmied_cpus);
+#endif
+	/*
+	 * Only allow 1 cpu to proceed
+	 */
+	arch_spin_lock(&nmi_lock);
+
+#ifdef REAL_NMI_SIGNAL
+	/*
+	 * Wait up to 15 seconds for the other cpus to respond to the NMI.
+	 * If a cpu has not responded after 10 sec, send it 1 additional NMI.
+	 * This is for 2 reasons:
+	 *	- sometimes a MMSC fail to NMI all cpus.
+	 *	- on 512p SN0 system, the MMSC will only send NMIs to
+	 *	  half the cpus. Unfortunately, we don't know which cpus may be
+	 *	  NMIed - it depends on how the site chooses to configure.
+	 *
+	 * Note: it has been measure that it takes the MMSC up to 2.3 secs to
+	 * send NMIs to all cpus on a 256p system.
+	 */
+	for (i=0; i < 1500; i++) {
+		for_each_online_node(node)
+			if (NODEPDA(node)->dump_count == 0)
+				break;
+		if (node == MAX_NUMNODES)
+			break;
+		if (i == 1000) {
+			for_each_online_node(node)
+				if (NODEPDA(node)->dump_count == 0) {
+					cpu = cpumask_first(cpumask_of_node(node));
+					for (n=0; n < CNODE_NUM_CPUS(node); cpu++, n++) {
+						CPUMASK_SETB(nmied_cpus, cpu);
+						/*
+						 * cputonasid, cputoslice
+						 * needs kernel cpuid
+						 */
+						SEND_NMI((cputonasid(cpu)), (cputoslice(cpu)));
+					}
+				}
+
+		}
+		udelay(10000);
+	}
+#else
+	while (atomic_read(&nmied_cpus) != num_online_cpus());
+#endif
+
+	/*
+	 * Save the nmi cpu registers for all cpu in the eframe format.
+	 */
+	nmi_eframes_save();
+	LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
+}