patch-2.4.19 linux-2.4.19/arch/ia64/sn/io/sn1/huberror.c

• Lines: 229
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/io/sn1/huberror.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/io/sn1/huberror.c linux-2.4.19/arch/ia64/sn/io/sn1/huberror.c
@@ -0,0 +1,228 @@
+/* $Id: huberror.c,v 1.1 2002/02/28 17:31:25 marcelo Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1992 - 1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
+ */
+
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <asm/smp.h>
+#include <asm/sn/sgi.h>
+#include <asm/sn/io.h>
+#include <asm/sn/iograph.h>
+#include <asm/sn/invent.h>
+#include <asm/sn/hcl.h>
+#include <asm/sn/labelcl.h>
+#include <asm/sn/sn_private.h>
+#include <asm/sn/klconfig.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/pci/pciio.h>
+#include <asm/sn/pci/pcibr.h>
+#include <asm/sn/xtalk/xtalk.h>
+#include <asm/sn/pci/pcibr_private.h>
+#include <asm/sn/intr.h>
+
+extern void hubni_eint_init(cnodeid_t cnode);
+extern void hubii_eint_init(cnodeid_t cnode);
+extern void hubii_eint_handler (int irq, void *arg, struct pt_regs *ep);
+extern void snia_error_intr_handler(int irq, void *devid, struct pt_regs *pt_regs);
+
+extern int maxcpus;
+
+#define HUB_ERROR_PERIOD        (120 * HZ)      /* 2 minutes */
+
+
+void
+hub_error_clear(nasid_t nasid)
+{
+	int i;
+	hubreg_t idsr;
+	int sn;
+
+	for(sn=0; sn<NUM_SUBNODES; sn++) {
+		REMOTE_HUB_PI_S(nasid, sn, PI_ERR_INT_PEND, -1);
+		REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS0_A_CLR, -1);
+		REMOTE_HUB_PI_S(nasid, sn, PI_ERR_STATUS0_B_CLR, -1);
+		REMOTE_HUB_PI_S(nasid, sn, PI_SPURIOUS_HDR_0, 0);
+		REMOTE_HUB_PI_S(nasid, sn, PI_SPURIOUS_HDR_1, 0);
+	}
+
+	REMOTE_HUB_L(nasid, MD_DIR_ERROR_CLR);
+	REMOTE_HUB_L(nasid, MD_MEM_ERROR_CLR);
+	REMOTE_HUB_L(nasid, MD_MISC1_ERROR_CLR);
+	REMOTE_HUB_L(nasid, MD_PROTOCOL_ERR_CLR);
+
+    /*
+     * Make sure spurious write response errors are cleared
+     * (values are from hub_set_prb())
+     */
+    for (i = 0; i <= HUB_WIDGET_ID_MAX - HUB_WIDGET_ID_MIN + 1; i++) {
+        iprb_t prb;
+
+	prb.iprb_regval = REMOTE_HUB_L(nasid, IIO_IOPRB_0 + (i * sizeof(hubreg_t)));
+
+        /* Clear out some fields */
+        prb.iprb_ovflow = 1;
+        prb.iprb_bnakctr = 0;
+        prb.iprb_anakctr = 0;
+
+	/*
+	 * PIO reads in fire-and-forget mode on bedrock 1.0 don't
+	 * frob the credit count properly, making the responses appear
+	 * spurious.  So don't use fire-and-forget mode.  Bug 761802.
+	 */
+        prb.iprb_ff = 0;        /* disable fire-and-forget mode by default */
+
+        prb.iprb_xtalkctr = 3;  /* approx. PIO credits for the widget */
+
+        REMOTE_HUB_S(nasid, IIO_IOPRB_0 + (i * sizeof(hubreg_t)), prb.iprb_regval);
+    }
+
+    REMOTE_HUB_S(nasid, IIO_IO_ERR_CLR, -1);
+    idsr = REMOTE_HUB_L(nasid, IIO_IIDSR);
+    REMOTE_HUB_S(nasid, IIO_IIDSR, (idsr & ~(IIO_IIDSR_SENT_MASK)));
+
+    REMOTE_HUB_L(nasid, NI_PORT_ERROR_CLEAR);
+    /* No need to clear NI_PORT_HEADER regs; they are continually overwritten*/
+
+    REMOTE_HUB_S(nasid, LB_ERROR_MASK_CLR, -1);
+    REMOTE_HUB_S(nasid, LB_ERROR_HDR1, 0);
+
+    /* Clear XB error regs, in order */
+    for (i = 0;
+         i <= XB_FIRST_ERROR_CLEAR - XB_POQ0_ERROR_CLEAR;
+         i += sizeof(hubreg_t)) {
+        REMOTE_HUB_S(nasid, XB_POQ0_ERROR_CLEAR + i, 0);
+    }
+}
+
+
+/*
+ * Function	: hub_error_init
+ * Purpose	: initialize the error handling requirements for a given hub.
+ * Parameters	: cnode, the compact nodeid.
+ * Assumptions	: Called only once per hub, either by a local cpu. Or by a 
+ *			remote cpu, when this hub is headless.(cpuless)
+ * Returns	: None
+ */
+
+void
+hub_error_init(cnodeid_t cnode)
+{
+	nasid_t nasid;
+
+    nasid = cnodeid_to_nasid(cnode);
+    hub_error_clear(nasid);
+
+    /*
+     * Now setup the hub ii and ni error interrupt handler.
+     */
+
+    hubii_eint_init(cnode);
+    hubni_eint_init(cnode);
+
+    return;
+}
+
+/*
+ * Function	: hubii_eint_init
+ * Parameters	: cnode
+ * Purpose	: to initialize the hub iio error interrupt.
+ * Assumptions	: Called once per hub, by the cpu which will ultimately
+ *			handle this interrupt.
+ * Returns	: None.
+ */
+
+
+void
+hubii_eint_init(cnodeid_t cnode)
+{
+    int			bit, rv;
+    ii_iidsr_u_t    	hubio_eint;
+    hubinfo_t		hinfo; 
+    cpuid_t		intr_cpu;
+    devfs_handle_t 	hub_v;
+    ii_ilcsr_u_t	ilcsr;
+    int bit_pos_to_irq(int bit);
+    int synergy_intr_connect(int bit, int cpuid);
+
+
+    hub_v = (devfs_handle_t)cnodeid_to_vertex(cnode);
+    ASSERT_ALWAYS(hub_v);
+    hubinfo_get(hub_v, &hinfo);
+
+    ASSERT(hinfo);
+    ASSERT(hinfo->h_cnodeid == cnode);
+
+    ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(hinfo->h_nasid, IIO_ILCSR);
+
+    if ((ilcsr.ii_ilcsr_fld_s.i_llp_stat & 0x2) == 0) {
+	/* 
+	 * HUB II link is not up. 
+	 * Just disable LLP, and don't connect any interrupts.
+	 */
+	ilcsr.ii_ilcsr_fld_s.i_llp_en = 0;
+	REMOTE_HUB_S(hinfo->h_nasid, IIO_ILCSR, ilcsr.ii_ilcsr_regval);
+	return;
+    }
+    /* Select a possible interrupt target where there is a free interrupt
+     * bit and also reserve the interrupt bit for this IO error interrupt
+     */
+    intr_cpu = intr_heuristic(hub_v,0,INTRCONNECT_ANYBIT,II_ERRORINT,hub_v,
+			      "HUB IO error interrupt",&bit);
+    if (intr_cpu == CPU_NONE) {
+	printk("hubii_eint_init: intr_reserve_level failed, cnode %d", cnode);
+	return;
+    }
+	
+    rv = intr_connect_level(intr_cpu, bit, 0, NULL);
+    synergy_intr_connect(bit, intr_cpu);
+    request_irq(bit_pos_to_irq(bit) + (intr_cpu << 8), hubii_eint_handler, 0, "SN hub error", (void *)hub_v);
+    ASSERT_ALWAYS(rv >= 0);
+    hubio_eint.ii_iidsr_regval = 0;
+    hubio_eint.ii_iidsr_fld_s.i_enable = 1;
+    hubio_eint.ii_iidsr_fld_s.i_level = bit;/* Take the least significant bits*/
+    hubio_eint.ii_iidsr_fld_s.i_node = COMPACT_TO_NASID_NODEID(cnode);
+    hubio_eint.ii_iidsr_fld_s.i_pi_id = cpuid_to_subnode(intr_cpu);
+    REMOTE_HUB_S(hinfo->h_nasid, IIO_IIDSR, hubio_eint.ii_iidsr_regval);
+
+}
+
+void
+hubni_eint_init(cnodeid_t cnode)
+{
+    int intr_bit;
+    cpuid_t targ;
+
+
+    if ((targ = cnodeid_to_cpuid(cnode)) == CPU_NONE)
+	return;
+
+	/* The prom chooses which cpu gets these interrupts, but we
+	*  don't know which one it chose.  We will register all of the 
+	*  cpus to be sure.  This only costs us an irqaction per cpu.
+	*/
+    for (; targ < CPUS_PER_NODE; targ++) {
+	if (!cpu_enabled(targ) ) continue;
+	/* connect the INTEND1 bits. */
+	for (intr_bit = XB_ERROR; intr_bit <= MSC_PANIC_INTR; intr_bit++) {
+		intr_connect_level(targ, intr_bit, II_ERRORINT, NULL);
+	}
+	request_irq(SGI_HUB_ERROR_IRQ + (targ << 8), snia_error_intr_handler, 0, "SN hub error", NULL);
+	/* synergy masks are initialized in the prom to enable all interrupts. */
+	/* We'll just leave them that way, here, for these interrupts. */
+    }
+}
+
+
+/*ARGSUSED*/
+void
+hubii_eint_handler (int irq, void *arg, struct pt_regs *ep)
+{
+
+	panic("Hubii interrupt\n");
+}