1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24/*
25 *	Kstat support for X86 PCI driver
26 */
27
28#include <sys/conf.h>
29#include <sys/mach_intr.h>
30#include <sys/psm.h>
31#include <sys/clock.h>
32#include <sys/apic.h>
33#include <io/pci/pci_var.h>
34
35typedef struct pci_kstat_private {
36	ddi_intr_handle_impl_t	*hdlp;
37	dev_info_t		*rootnex_dip;
38} pci_kstat_private_t;
39
40static struct {
41	kstat_named_t ihks_name;
42	kstat_named_t ihks_type;
43	kstat_named_t ihks_cpu;
44	kstat_named_t ihks_pil;
45	kstat_named_t ihks_time;
46	kstat_named_t ihks_ino;
47	kstat_named_t ihks_cookie;
48	kstat_named_t ihks_devpath;
49	kstat_named_t ihks_buspath;
50} pci_ks_template = {
51	{ "name",	KSTAT_DATA_CHAR },
52	{ "type",	KSTAT_DATA_CHAR },
53	{ "cpu",	KSTAT_DATA_UINT64 },
54	{ "pil",	KSTAT_DATA_UINT64 },
55	{ "time",	KSTAT_DATA_UINT64 },
56	{ "ino",	KSTAT_DATA_UINT64 },
57	{ "cookie",	KSTAT_DATA_UINT64 },
58	{ "devpath",	KSTAT_DATA_STRING },
59	{ "buspath",	KSTAT_DATA_STRING },
60};
61
62static char ih_devpath[MAXPATHLEN];
63static char ih_buspath[MAXPATHLEN];
64static uint32_t pci_ks_inst;
65static kmutex_t pci_ks_template_lock;
66
67extern int		(*psm_intr_ops)(dev_info_t *, ddi_intr_handle_impl_t *,
68			    psm_intr_op_t, int *);
69
70/*ARGSUSED*/
71static int
72pci_ih_ks_update(kstat_t *ksp, int rw)
73{
74	pci_kstat_private_t *private_data =
75	    (pci_kstat_private_t *)ksp->ks_private;
76	dev_info_t *rootnex_dip = private_data->rootnex_dip;
77	ddi_intr_handle_impl_t tmp_hdl, *ih_p = private_data->hdlp;
78	dev_info_t *dip = ih_p->ih_dip;
79	int maxlen = sizeof (pci_ks_template.ihks_name.value.c);
80	apic_get_intr_t	intrinfo;
81
82	(void) snprintf(pci_ks_template.ihks_name.value.c, maxlen, "%s%d",
83	    ddi_driver_name(dip), ddi_get_instance(dip));
84	(void) ddi_pathname(dip, ih_devpath);
85	(void) ddi_pathname(rootnex_dip, ih_buspath);
86	kstat_named_setstr(&pci_ks_template.ihks_devpath, ih_devpath);
87	kstat_named_setstr(&pci_ks_template.ihks_buspath, ih_buspath);
88
89	/*
90	 * Note that although possibly multiple vectors can map to an IRQ, the
91	 * vector returned below will always be the same for a given IRQ
92	 * specified, and so all kstats for a given IRQ will report the same
93	 * value for the ino field.
94	 *
95	 * ---
96	 *
97	 * Check for the enabled state, since kstats are set up when the ISR is
98	 * added, not enabled.  There may be a period where interrupts are not
99	 * enabled even though they may have been added.
100	 *
101	 * It is also possible that the vector is for a dummy interrupt.
102	 * pci_get_intr_from_vecirq will return failure in this case.
103	 */
104	bcopy(ih_p, &tmp_hdl, sizeof (ddi_intr_handle_impl_t));
105	tmp_hdl.ih_private = (void *)&intrinfo;
106	intrinfo.avgi_cpu_id = 0; /* In case psm_intr_ops fails */
107	intrinfo.avgi_req_flags = PSMGI_REQ_CPUID | PSMGI_REQ_VECTOR;
108	intrinfo.avgi_req_flags |= PSMGI_INTRBY_DEFAULT;
109
110	if ((ih_p->ih_state != DDI_IHDL_STATE_ENABLE) ||
111	    ((*psm_intr_ops)(NULL, &tmp_hdl, PSM_INTR_OP_GET_INTR, NULL) !=
112	    DDI_SUCCESS) ||
113	    (intrinfo.avgi_cpu_id & PSMGI_CPU_FLAGS)) {
114
115		(void) strcpy(pci_ks_template.ihks_type.value.c, "disabled");
116		pci_ks_template.ihks_pil.value.ui64 = 0;
117		pci_ks_template.ihks_time.value.ui64 = 0;
118		pci_ks_template.ihks_cookie.value.ui64 = 0;
119		pci_ks_template.ihks_cpu.value.ui64 = 0;
120		pci_ks_template.ihks_ino.value.ui64 = 0;
121
122		/* Interrupt is user-bound.  Remove kstat. */
123		if (intrinfo.avgi_cpu_id & PSMGI_CPU_FLAGS)
124			(void) taskq_dispatch(system_taskq,
125			    (void (*)(void *))pci_kstat_delete, ksp, TQ_SLEEP);
126
127		return (0);
128	}
129
130	/*
131	 * Interrupt is valid (not a dummy), not user-bound to a specific cpu,
132	 * and enabled.  Update kstat fields.
133	 */
134	switch (ih_p->ih_type) {
135	case DDI_INTR_TYPE_MSI:
136		(void) strcpy(pci_ks_template.ihks_type.value.c, "msi");
137		break;
138	case DDI_INTR_TYPE_MSIX:
139		(void) strcpy(pci_ks_template.ihks_type.value.c, "msix");
140		break;
141	default:
142		(void) strcpy(pci_ks_template.ihks_type.value.c, "fixed");
143		break;
144	}
145	pci_ks_template.ihks_pil.value.ui64 = ih_p->ih_pri;
146	pci_ks_template.ihks_time.value.ui64 =
147	    ((ihdl_plat_t *)ih_p->ih_private)->ip_ticks;
148	scalehrtime((hrtime_t *)&pci_ks_template.ihks_time.value.ui64);
149	pci_ks_template.ihks_cookie.value.ui64 = ih_p->ih_vector;
150	/* CPU won't be user bound at this point. */
151	pci_ks_template.ihks_cpu.value.ui64 = intrinfo.avgi_cpu_id;
152	pci_ks_template.ihks_ino.value.ui64 = intrinfo.avgi_vector;
153
154	return (0);
155}
156
157
158void pci_kstat_create(kstat_t **kspp, dev_info_t *rootnex_dip,
159    ddi_intr_handle_impl_t *hdlp)
160{
161	pci_kstat_private_t *private_data;
162
163	*kspp = kstat_create("pci_intrs", atomic_inc_32_nv(&pci_ks_inst),
164	    _MODULE_NAME, "interrupts", KSTAT_TYPE_NAMED,
165	    sizeof (pci_ks_template) / sizeof (kstat_named_t),
166	    KSTAT_FLAG_VIRTUAL);
167	if (*kspp != NULL) {
168
169		private_data =
170		    kmem_zalloc(sizeof (pci_kstat_private_t), KM_SLEEP);
171		private_data->hdlp = hdlp;
172		private_data->rootnex_dip = rootnex_dip;
173
174		(*kspp)->ks_private = private_data;
175		(*kspp)->ks_data_size += MAXPATHLEN * 2;
176		(*kspp)->ks_lock = &pci_ks_template_lock;
177		(*kspp)->ks_data = &pci_ks_template;
178		(*kspp)->ks_update = pci_ih_ks_update;
179		kstat_install(*kspp);
180	}
181}
182
183
184/*
185 * This function is invoked in two ways:
186 * - Thru taskq thread via pci_ih_ks_update to remove kstats for user-bound
187 *   interrupts.
188 * - From the REMISR introp when an interrupt is being removed.
189 */
190void
191pci_kstat_delete(kstat_t *ksp)
192{
193	pci_kstat_private_t *kstat_private;
194	ddi_intr_handle_impl_t *hdlp;
195
196	if (ksp) {
197		kstat_private = ksp->ks_private;
198		hdlp = kstat_private->hdlp;
199		((ihdl_plat_t *)hdlp->ih_private)->ip_ksp = NULL;
200
201		/*
202		 * Delete the kstat before removing the private pointer, to
203		 * prevent a kstat update from coming after private is freed.
204		 */
205		kstat_delete(ksp);
206
207		kmem_free(kstat_private, sizeof (pci_kstat_private_t));
208	}
209}
210