1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Numascale NumaConnect-Specific APIC Code
7  *
8  * Copyright (C) 2011 Numascale AS. All rights reserved.
9  *
10  * Send feedback to <support@numascale.com>
11  *
12  */
13 #include <linux/types.h>
14 #include <linux/init.h>
15 #include <linux/pgtable.h>
16 
17 #include <asm/numachip/numachip.h>
18 #include <asm/numachip/numachip_csr.h>
19 
20 
21 #include "local.h"
22 
23 u8 numachip_system __read_mostly;
24 static const struct apic apic_numachip1;
25 static const struct apic apic_numachip2;
26 static void (*numachip_apic_icr_write)(int apicid, unsigned int val) __read_mostly;
27 
28 static unsigned int numachip1_get_apic_id(unsigned long x)
29 {
30 	unsigned long value;
31 	unsigned int id = (x >> 24) & 0xff;
32 
33 	if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
34 		rdmsrl(MSR_FAM10H_NODE_ID, value);
35 		id |= (value << 2) & 0xff00;
36 	}
37 
38 	return id;
39 }
40 
41 static u32 numachip1_set_apic_id(unsigned int id)
42 {
43 	return (id & 0xff) << 24;
44 }
45 
46 static unsigned int numachip2_get_apic_id(unsigned long x)
47 {
48 	u64 mcfg;
49 
50 	rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg);
51 	return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
52 }
53 
54 static u32 numachip2_set_apic_id(unsigned int id)
55 {
56 	return id << 24;
57 }
58 
59 static int numachip_apic_id_valid(u32 apicid)
60 {
61 	/* Trust what bootloader passes in MADT */
62 	return 1;
63 }
64 
65 static int numachip_apic_id_registered(void)
66 {
67 	return 1;
68 }
69 
70 static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
71 {
72 	return initial_apic_id >> index_msb;
73 }
74 
75 static void numachip1_apic_icr_write(int apicid, unsigned int val)
76 {
77 	write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val);
78 }
79 
80 static void numachip2_apic_icr_write(int apicid, unsigned int val)
81 {
82 	numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val);
83 }
84 
85 static int numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip)
86 {
87 	numachip_apic_icr_write(phys_apicid, APIC_DM_INIT);
88 	numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP |
89 		(start_rip >> 12));
90 
91 	return 0;
92 }
93 
94 static void numachip_send_IPI_one(int cpu, int vector)
95 {
96 	int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu);
97 	unsigned int dmode;
98 
99 	preempt_disable();
100 	local_apicid = __this_cpu_read(x86_cpu_to_apicid);
101 
102 	/* Send via local APIC where non-local part matches */
103 	if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) {
104 		unsigned long flags;
105 
106 		local_irq_save(flags);
107 		__default_send_IPI_dest_field(apicid, vector,
108 			APIC_DEST_PHYSICAL);
109 		local_irq_restore(flags);
110 		preempt_enable();
111 		return;
112 	}
113 	preempt_enable();
114 
115 	dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED;
116 	numachip_apic_icr_write(apicid, dmode | vector);
117 }
118 
119 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
120 {
121 	unsigned int cpu;
122 
123 	for_each_cpu(cpu, mask)
124 		numachip_send_IPI_one(cpu, vector);
125 }
126 
127 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
128 						int vector)
129 {
130 	unsigned int this_cpu = smp_processor_id();
131 	unsigned int cpu;
132 
133 	for_each_cpu(cpu, mask) {
134 		if (cpu != this_cpu)
135 			numachip_send_IPI_one(cpu, vector);
136 	}
137 }
138 
139 static void numachip_send_IPI_allbutself(int vector)
140 {
141 	unsigned int this_cpu = smp_processor_id();
142 	unsigned int cpu;
143 
144 	for_each_online_cpu(cpu) {
145 		if (cpu != this_cpu)
146 			numachip_send_IPI_one(cpu, vector);
147 	}
148 }
149 
150 static void numachip_send_IPI_all(int vector)
151 {
152 	numachip_send_IPI_mask(cpu_online_mask, vector);
153 }
154 
155 static void numachip_send_IPI_self(int vector)
156 {
157 	apic_write(APIC_SELF_IPI, vector);
158 }
159 
160 static int __init numachip1_probe(void)
161 {
162 	return apic == &apic_numachip1;
163 }
164 
165 static int __init numachip2_probe(void)
166 {
167 	return apic == &apic_numachip2;
168 }
169 
170 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
171 {
172 	u64 val;
173 	u32 nodes = 1;
174 
175 	this_cpu_write(cpu_llc_id, node);
176 
177 	/* Account for nodes per socket in multi-core-module processors */
178 	if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
179 		rdmsrl(MSR_FAM10H_NODE_ID, val);
180 		nodes = ((val >> 3) & 7) + 1;
181 	}
182 
183 	c->phys_proc_id = node / nodes;
184 }
185 
186 static int __init numachip_system_init(void)
187 {
188 	/* Map the LCSR area and set up the apic_icr_write function */
189 	switch (numachip_system) {
190 	case 1:
191 		init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
192 		numachip_apic_icr_write = numachip1_apic_icr_write;
193 		break;
194 	case 2:
195 		init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE);
196 		numachip_apic_icr_write = numachip2_apic_icr_write;
197 		break;
198 	default:
199 		return 0;
200 	}
201 
202 	x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
203 	x86_init.pci.arch_init = pci_numachip_init;
204 
205 	return 0;
206 }
207 early_initcall(numachip_system_init);
208 
209 static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
210 {
211 	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
212 	    (strncmp(oem_table_id, "NCONNECT", 8) != 0))
213 		return 0;
214 
215 	numachip_system = 1;
216 
217 	return 1;
218 }
219 
220 static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
221 {
222 	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
223 	    (strncmp(oem_table_id, "NCONECT2", 8) != 0))
224 		return 0;
225 
226 	numachip_system = 2;
227 
228 	return 1;
229 }
230 
231 /* APIC IPIs are queued */
232 static void numachip_apic_wait_icr_idle(void)
233 {
234 }
235 
236 /* APIC NMI IPIs are queued */
237 static u32 numachip_safe_apic_wait_icr_idle(void)
238 {
239 	return 0;
240 }
241 
242 static const struct apic apic_numachip1 __refconst = {
243 	.name				= "NumaConnect system",
244 	.probe				= numachip1_probe,
245 	.acpi_madt_oem_check		= numachip1_acpi_madt_oem_check,
246 	.apic_id_valid			= numachip_apic_id_valid,
247 	.apic_id_registered		= numachip_apic_id_registered,
248 
249 	.delivery_mode			= APIC_DELIVERY_MODE_FIXED,
250 	.dest_mode_logical		= false,
251 
252 	.disable_esr			= 0,
253 
254 	.check_apicid_used		= NULL,
255 	.init_apic_ldr			= flat_init_apic_ldr,
256 	.ioapic_phys_id_map		= NULL,
257 	.setup_apic_routing		= NULL,
258 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
259 	.apicid_to_cpu_present		= NULL,
260 	.check_phys_apicid_present	= default_check_phys_apicid_present,
261 	.phys_pkg_id			= numachip_phys_pkg_id,
262 
263 	.get_apic_id			= numachip1_get_apic_id,
264 	.set_apic_id			= numachip1_set_apic_id,
265 
266 	.calc_dest_apicid		= apic_default_calc_apicid,
267 
268 	.send_IPI			= numachip_send_IPI_one,
269 	.send_IPI_mask			= numachip_send_IPI_mask,
270 	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
271 	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
272 	.send_IPI_all			= numachip_send_IPI_all,
273 	.send_IPI_self			= numachip_send_IPI_self,
274 
275 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
276 	.inquire_remote_apic		= NULL, /* REMRD not supported */
277 
278 	.read				= native_apic_mem_read,
279 	.write				= native_apic_mem_write,
280 	.eoi_write			= native_apic_mem_write,
281 	.icr_read			= native_apic_icr_read,
282 	.icr_write			= native_apic_icr_write,
283 	.wait_icr_idle			= numachip_apic_wait_icr_idle,
284 	.safe_wait_icr_idle		= numachip_safe_apic_wait_icr_idle,
285 };
286 
287 apic_driver(apic_numachip1);
288 
289 static const struct apic apic_numachip2 __refconst = {
290 	.name				= "NumaConnect2 system",
291 	.probe				= numachip2_probe,
292 	.acpi_madt_oem_check		= numachip2_acpi_madt_oem_check,
293 	.apic_id_valid			= numachip_apic_id_valid,
294 	.apic_id_registered		= numachip_apic_id_registered,
295 
296 	.delivery_mode			= APIC_DELIVERY_MODE_FIXED,
297 	.dest_mode_logical		= false,
298 
299 	.disable_esr			= 0,
300 
301 	.check_apicid_used		= NULL,
302 	.init_apic_ldr			= flat_init_apic_ldr,
303 	.ioapic_phys_id_map		= NULL,
304 	.setup_apic_routing		= NULL,
305 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
306 	.apicid_to_cpu_present		= NULL,
307 	.check_phys_apicid_present	= default_check_phys_apicid_present,
308 	.phys_pkg_id			= numachip_phys_pkg_id,
309 
310 	.get_apic_id			= numachip2_get_apic_id,
311 	.set_apic_id			= numachip2_set_apic_id,
312 
313 	.calc_dest_apicid		= apic_default_calc_apicid,
314 
315 	.send_IPI			= numachip_send_IPI_one,
316 	.send_IPI_mask			= numachip_send_IPI_mask,
317 	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
318 	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
319 	.send_IPI_all			= numachip_send_IPI_all,
320 	.send_IPI_self			= numachip_send_IPI_self,
321 
322 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
323 	.inquire_remote_apic		= NULL, /* REMRD not supported */
324 
325 	.read				= native_apic_mem_read,
326 	.write				= native_apic_mem_write,
327 	.eoi_write			= native_apic_mem_write,
328 	.icr_read			= native_apic_icr_read,
329 	.icr_write			= native_apic_icr_write,
330 	.wait_icr_idle			= numachip_apic_wait_icr_idle,
331 	.safe_wait_icr_idle		= numachip_safe_apic_wait_icr_idle,
332 };
333 
334 apic_driver(apic_numachip2);
335