Steven J. Hill | 2299c49 | 2012-08-31 16:13:07 -0500 | [diff] [blame] | 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 | * Copyright (C) 2008 Ralf Baechle (ralf@linux-mips.org) |
| 7 | * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. |
| 8 | */ |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 9 | #include <linux/bitmap.h> |
Andrew Bresticker | fb8f7be1 | 2014-10-20 12:03:55 -0700 | [diff] [blame] | 10 | #include <linux/clocksource.h> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 11 | #include <linux/init.h> |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 12 | #include <linux/interrupt.h> |
Andrew Bresticker | fb8f7be1 | 2014-10-20 12:03:55 -0700 | [diff] [blame] | 13 | #include <linux/irq.h> |
Joel Porquet | 41a83e0 | 2015-07-07 17:11:46 -0400 | [diff] [blame] | 14 | #include <linux/irqchip.h> |
Andrew Bresticker | 4060bbe | 2014-10-20 12:03:53 -0700 | [diff] [blame] | 15 | #include <linux/irqchip/mips-gic.h> |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 16 | #include <linux/of_address.h> |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 17 | #include <linux/sched.h> |
Ralf Baechle | 631330f | 2009-06-19 14:05:26 +0100 | [diff] [blame] | 18 | #include <linux/smp.h> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 19 | |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 20 | #include <asm/mips-cm.h> |
Steven J. Hill | 98b67c3 | 2012-08-31 16:18:49 -0500 | [diff] [blame] | 21 | #include <asm/setup.h> |
| 22 | #include <asm/traps.h> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 23 | |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 24 | #include <dt-bindings/interrupt-controller/mips-gic.h> |
| 25 | |
Steven J. Hill | ff86714 | 2013-04-10 16:27:04 -0500 | [diff] [blame] | 26 | unsigned int gic_present; |
Steven J. Hill | 98b67c3 | 2012-08-31 16:18:49 -0500 | [diff] [blame] | 27 | |
Jeffrey Deans | 822350b | 2014-07-17 09:20:53 +0100 | [diff] [blame] | 28 | struct gic_pcpu_mask { |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 29 | DECLARE_BITMAP(pcpu_mask, GIC_MAX_INTRS); |
Jeffrey Deans | 822350b | 2014-07-17 09:20:53 +0100 | [diff] [blame] | 30 | }; |
| 31 | |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 32 | struct gic_irq_spec { |
| 33 | enum { |
| 34 | GIC_DEVICE, |
| 35 | GIC_IPI |
| 36 | } type; |
| 37 | |
| 38 | union { |
| 39 | struct cpumask *ipimask; |
| 40 | unsigned int hwirq; |
| 41 | }; |
| 42 | }; |
| 43 | |
Alex Smith | c0a9f72 | 2015-10-12 10:40:43 +0100 | [diff] [blame] | 44 | static unsigned long __gic_base_addr; |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 45 | |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 46 | static void __iomem *gic_base; |
Steven J. Hill | 0b271f5 | 2012-08-31 16:05:37 -0500 | [diff] [blame] | 47 | static struct gic_pcpu_mask pcpu_masks[NR_CPUS]; |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 48 | static DEFINE_SPINLOCK(gic_lock); |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 49 | static struct irq_domain *gic_irq_domain; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 50 | static struct irq_domain *gic_dev_domain; |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 51 | static struct irq_domain *gic_ipi_domain; |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 52 | static int gic_shared_intrs; |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 53 | static int gic_vpes; |
Andrew Bresticker | 3263d08 | 2014-09-18 14:47:28 -0700 | [diff] [blame] | 54 | static unsigned int gic_cpu_pin; |
James Hogan | 1b6af71 | 2015-01-19 15:38:24 +0000 | [diff] [blame] | 55 | static unsigned int timer_cpu_pin; |
Andrew Bresticker | 4a6a3ea3 | 2014-09-18 14:47:26 -0700 | [diff] [blame] | 56 | static struct irq_chip gic_level_irq_controller, gic_edge_irq_controller; |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 57 | DECLARE_BITMAP(ipi_resrv, GIC_MAX_INTRS); |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 58 | DECLARE_BITMAP(ipi_available, GIC_MAX_INTRS); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 59 | |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 60 | static void __gic_irq_dispatch(void); |
| 61 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 62 | static inline u32 gic_read32(unsigned int reg) |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 63 | { |
| 64 | return __raw_readl(gic_base + reg); |
| 65 | } |
| 66 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 67 | static inline u64 gic_read64(unsigned int reg) |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 68 | { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 69 | return __raw_readq(gic_base + reg); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 70 | } |
| 71 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 72 | static inline unsigned long gic_read(unsigned int reg) |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 73 | { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 74 | if (!mips_cm_is64) |
| 75 | return gic_read32(reg); |
| 76 | else |
| 77 | return gic_read64(reg); |
| 78 | } |
| 79 | |
| 80 | static inline void gic_write32(unsigned int reg, u32 val) |
| 81 | { |
| 82 | return __raw_writel(val, gic_base + reg); |
| 83 | } |
| 84 | |
| 85 | static inline void gic_write64(unsigned int reg, u64 val) |
| 86 | { |
| 87 | return __raw_writeq(val, gic_base + reg); |
| 88 | } |
| 89 | |
| 90 | static inline void gic_write(unsigned int reg, unsigned long val) |
| 91 | { |
| 92 | if (!mips_cm_is64) |
| 93 | return gic_write32(reg, (u32)val); |
| 94 | else |
| 95 | return gic_write64(reg, (u64)val); |
| 96 | } |
| 97 | |
| 98 | static inline void gic_update_bits(unsigned int reg, unsigned long mask, |
| 99 | unsigned long val) |
| 100 | { |
| 101 | unsigned long regval; |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 102 | |
| 103 | regval = gic_read(reg); |
| 104 | regval &= ~mask; |
| 105 | regval |= val; |
| 106 | gic_write(reg, regval); |
| 107 | } |
| 108 | |
| 109 | static inline void gic_reset_mask(unsigned int intr) |
| 110 | { |
| 111 | gic_write(GIC_REG(SHARED, GIC_SH_RMASK) + GIC_INTR_OFS(intr), |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 112 | 1ul << GIC_INTR_BIT(intr)); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static inline void gic_set_mask(unsigned int intr) |
| 116 | { |
| 117 | gic_write(GIC_REG(SHARED, GIC_SH_SMASK) + GIC_INTR_OFS(intr), |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 118 | 1ul << GIC_INTR_BIT(intr)); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static inline void gic_set_polarity(unsigned int intr, unsigned int pol) |
| 122 | { |
| 123 | gic_update_bits(GIC_REG(SHARED, GIC_SH_SET_POLARITY) + |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 124 | GIC_INTR_OFS(intr), 1ul << GIC_INTR_BIT(intr), |
| 125 | (unsigned long)pol << GIC_INTR_BIT(intr)); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static inline void gic_set_trigger(unsigned int intr, unsigned int trig) |
| 129 | { |
| 130 | gic_update_bits(GIC_REG(SHARED, GIC_SH_SET_TRIGGER) + |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 131 | GIC_INTR_OFS(intr), 1ul << GIC_INTR_BIT(intr), |
| 132 | (unsigned long)trig << GIC_INTR_BIT(intr)); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static inline void gic_set_dual_edge(unsigned int intr, unsigned int dual) |
| 136 | { |
| 137 | gic_update_bits(GIC_REG(SHARED, GIC_SH_SET_DUAL) + GIC_INTR_OFS(intr), |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 138 | 1ul << GIC_INTR_BIT(intr), |
| 139 | (unsigned long)dual << GIC_INTR_BIT(intr)); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | static inline void gic_map_to_pin(unsigned int intr, unsigned int pin) |
| 143 | { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 144 | gic_write32(GIC_REG(SHARED, GIC_SH_INTR_MAP_TO_PIN_BASE) + |
| 145 | GIC_SH_MAP_TO_PIN(intr), GIC_MAP_TO_PIN_MSK | pin); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | static inline void gic_map_to_vpe(unsigned int intr, unsigned int vpe) |
| 149 | { |
| 150 | gic_write(GIC_REG(SHARED, GIC_SH_INTR_MAP_TO_VPE_BASE) + |
| 151 | GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe), |
| 152 | GIC_SH_MAP_TO_VPE_REG_BIT(vpe)); |
| 153 | } |
| 154 | |
Andrew Bresticker | a331ce6 | 2014-10-20 12:03:59 -0700 | [diff] [blame] | 155 | #ifdef CONFIG_CLKSRC_MIPS_GIC |
Steven J. Hill | dfa762e | 2013-04-10 16:28:36 -0500 | [diff] [blame] | 156 | cycle_t gic_read_count(void) |
| 157 | { |
| 158 | unsigned int hi, hi2, lo; |
| 159 | |
Markos Chandras | 6f50c83 | 2015-07-09 10:40:49 +0100 | [diff] [blame] | 160 | if (mips_cm_is64) |
| 161 | return (cycle_t)gic_read(GIC_REG(SHARED, GIC_SH_COUNTER)); |
| 162 | |
Steven J. Hill | dfa762e | 2013-04-10 16:28:36 -0500 | [diff] [blame] | 163 | do { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 164 | hi = gic_read32(GIC_REG(SHARED, GIC_SH_COUNTER_63_32)); |
| 165 | lo = gic_read32(GIC_REG(SHARED, GIC_SH_COUNTER_31_00)); |
| 166 | hi2 = gic_read32(GIC_REG(SHARED, GIC_SH_COUNTER_63_32)); |
Steven J. Hill | dfa762e | 2013-04-10 16:28:36 -0500 | [diff] [blame] | 167 | } while (hi2 != hi); |
| 168 | |
| 169 | return (((cycle_t) hi) << 32) + lo; |
| 170 | } |
Raghu Gandham | 0ab2b7d | 2013-04-10 16:30:12 -0500 | [diff] [blame] | 171 | |
Andrew Bresticker | 387904f | 2014-10-20 12:03:49 -0700 | [diff] [blame] | 172 | unsigned int gic_get_count_width(void) |
| 173 | { |
| 174 | unsigned int bits, config; |
| 175 | |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 176 | config = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG)); |
Andrew Bresticker | 387904f | 2014-10-20 12:03:49 -0700 | [diff] [blame] | 177 | bits = 32 + 4 * ((config & GIC_SH_CONFIG_COUNTBITS_MSK) >> |
| 178 | GIC_SH_CONFIG_COUNTBITS_SHF); |
| 179 | |
| 180 | return bits; |
| 181 | } |
| 182 | |
Raghu Gandham | 0ab2b7d | 2013-04-10 16:30:12 -0500 | [diff] [blame] | 183 | void gic_write_compare(cycle_t cnt) |
| 184 | { |
Markos Chandras | 6f50c83 | 2015-07-09 10:40:49 +0100 | [diff] [blame] | 185 | if (mips_cm_is64) { |
| 186 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE), cnt); |
| 187 | } else { |
| 188 | gic_write32(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_HI), |
| 189 | (int)(cnt >> 32)); |
| 190 | gic_write32(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_LO), |
| 191 | (int)(cnt & 0xffffffff)); |
| 192 | } |
Raghu Gandham | 0ab2b7d | 2013-04-10 16:30:12 -0500 | [diff] [blame] | 193 | } |
| 194 | |
Paul Burton | 414408d0 | 2014-03-05 11:35:53 +0000 | [diff] [blame] | 195 | void gic_write_cpu_compare(cycle_t cnt, int cpu) |
| 196 | { |
| 197 | unsigned long flags; |
| 198 | |
| 199 | local_irq_save(flags); |
| 200 | |
Paul Burton | d46812b | 2016-02-03 03:15:27 +0000 | [diff] [blame] | 201 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), mips_cm_vp_id(cpu)); |
Markos Chandras | 6f50c83 | 2015-07-09 10:40:49 +0100 | [diff] [blame] | 202 | |
| 203 | if (mips_cm_is64) { |
| 204 | gic_write(GIC_REG(VPE_OTHER, GIC_VPE_COMPARE), cnt); |
| 205 | } else { |
| 206 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_COMPARE_HI), |
| 207 | (int)(cnt >> 32)); |
| 208 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_COMPARE_LO), |
| 209 | (int)(cnt & 0xffffffff)); |
| 210 | } |
Paul Burton | 414408d0 | 2014-03-05 11:35:53 +0000 | [diff] [blame] | 211 | |
| 212 | local_irq_restore(flags); |
| 213 | } |
| 214 | |
Raghu Gandham | 0ab2b7d | 2013-04-10 16:30:12 -0500 | [diff] [blame] | 215 | cycle_t gic_read_compare(void) |
| 216 | { |
| 217 | unsigned int hi, lo; |
| 218 | |
Markos Chandras | 6f50c83 | 2015-07-09 10:40:49 +0100 | [diff] [blame] | 219 | if (mips_cm_is64) |
| 220 | return (cycle_t)gic_read(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE)); |
| 221 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 222 | hi = gic_read32(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_HI)); |
| 223 | lo = gic_read32(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_LO)); |
Raghu Gandham | 0ab2b7d | 2013-04-10 16:30:12 -0500 | [diff] [blame] | 224 | |
| 225 | return (((cycle_t) hi) << 32) + lo; |
| 226 | } |
Markos Chandras | 8fa4b93 | 2015-03-23 12:32:01 +0000 | [diff] [blame] | 227 | |
| 228 | void gic_start_count(void) |
| 229 | { |
| 230 | u32 gicconfig; |
| 231 | |
| 232 | /* Start the counter */ |
| 233 | gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG)); |
| 234 | gicconfig &= ~(1 << GIC_SH_CONFIG_COUNTSTOP_SHF); |
| 235 | gic_write(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig); |
| 236 | } |
| 237 | |
| 238 | void gic_stop_count(void) |
| 239 | { |
| 240 | u32 gicconfig; |
| 241 | |
| 242 | /* Stop the counter */ |
| 243 | gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG)); |
| 244 | gicconfig |= 1 << GIC_SH_CONFIG_COUNTSTOP_SHF; |
| 245 | gic_write(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig); |
| 246 | } |
| 247 | |
Steven J. Hill | dfa762e | 2013-04-10 16:28:36 -0500 | [diff] [blame] | 248 | #endif |
| 249 | |
Paul Burton | 835d2b4 | 2016-02-03 03:15:28 +0000 | [diff] [blame] | 250 | unsigned gic_read_local_vp_id(void) |
| 251 | { |
| 252 | unsigned long ident; |
| 253 | |
| 254 | ident = gic_read(GIC_REG(VPE_LOCAL, GIC_VP_IDENT)); |
| 255 | return ident & GIC_VP_IDENT_VCNUM_MSK; |
| 256 | } |
| 257 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 258 | static bool gic_local_irq_is_routable(int intr) |
| 259 | { |
| 260 | u32 vpe_ctl; |
| 261 | |
| 262 | /* All local interrupts are routable in EIC mode. */ |
| 263 | if (cpu_has_veic) |
| 264 | return true; |
| 265 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 266 | vpe_ctl = gic_read32(GIC_REG(VPE_LOCAL, GIC_VPE_CTL)); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 267 | switch (intr) { |
| 268 | case GIC_LOCAL_INT_TIMER: |
| 269 | return vpe_ctl & GIC_VPE_CTL_TIMER_RTBL_MSK; |
| 270 | case GIC_LOCAL_INT_PERFCTR: |
| 271 | return vpe_ctl & GIC_VPE_CTL_PERFCNT_RTBL_MSK; |
| 272 | case GIC_LOCAL_INT_FDC: |
| 273 | return vpe_ctl & GIC_VPE_CTL_FDC_RTBL_MSK; |
| 274 | case GIC_LOCAL_INT_SWINT0: |
| 275 | case GIC_LOCAL_INT_SWINT1: |
| 276 | return vpe_ctl & GIC_VPE_CTL_SWINT_RTBL_MSK; |
| 277 | default: |
| 278 | return true; |
| 279 | } |
| 280 | } |
| 281 | |
Andrew Bresticker | 3263d08 | 2014-09-18 14:47:28 -0700 | [diff] [blame] | 282 | static void gic_bind_eic_interrupt(int irq, int set) |
Steven J. Hill | 98b67c3 | 2012-08-31 16:18:49 -0500 | [diff] [blame] | 283 | { |
| 284 | /* Convert irq vector # to hw int # */ |
| 285 | irq -= GIC_PIN_TO_VEC_OFFSET; |
| 286 | |
| 287 | /* Set irq to use shadow set */ |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 288 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_EIC_SHADOW_SET_BASE) + |
| 289 | GIC_VPE_EIC_SS(irq), set); |
Steven J. Hill | 98b67c3 | 2012-08-31 16:18:49 -0500 | [diff] [blame] | 290 | } |
| 291 | |
Qais Yousef | bb11cff | 2015-12-08 13:20:28 +0000 | [diff] [blame] | 292 | static void gic_send_ipi(struct irq_data *d, unsigned int cpu) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 293 | { |
Qais Yousef | bb11cff | 2015-12-08 13:20:28 +0000 | [diff] [blame] | 294 | irq_hw_number_t hwirq = GIC_HWIRQ_TO_SHARED(irqd_to_hwirq(d)); |
| 295 | |
| 296 | gic_write(GIC_REG(SHARED, GIC_SH_WEDGE), GIC_SH_WEDGE_SET(hwirq)); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 297 | } |
| 298 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 299 | int gic_get_c0_compare_int(void) |
| 300 | { |
| 301 | if (!gic_local_irq_is_routable(GIC_LOCAL_INT_TIMER)) |
| 302 | return MIPS_CPU_IRQ_BASE + cp0_compare_irq; |
| 303 | return irq_create_mapping(gic_irq_domain, |
| 304 | GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_TIMER)); |
| 305 | } |
| 306 | |
| 307 | int gic_get_c0_perfcount_int(void) |
| 308 | { |
| 309 | if (!gic_local_irq_is_routable(GIC_LOCAL_INT_PERFCTR)) { |
James Hogan | 7e3e6cb | 2015-01-27 21:45:50 +0000 | [diff] [blame] | 310 | /* Is the performance counter shared with the timer? */ |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 311 | if (cp0_perfcount_irq < 0) |
| 312 | return -1; |
| 313 | return MIPS_CPU_IRQ_BASE + cp0_perfcount_irq; |
| 314 | } |
| 315 | return irq_create_mapping(gic_irq_domain, |
| 316 | GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_PERFCTR)); |
| 317 | } |
| 318 | |
James Hogan | 6429e2b | 2015-01-29 11:14:09 +0000 | [diff] [blame] | 319 | int gic_get_c0_fdc_int(void) |
| 320 | { |
| 321 | if (!gic_local_irq_is_routable(GIC_LOCAL_INT_FDC)) { |
| 322 | /* Is the FDC IRQ even present? */ |
| 323 | if (cp0_fdc_irq < 0) |
| 324 | return -1; |
| 325 | return MIPS_CPU_IRQ_BASE + cp0_fdc_irq; |
| 326 | } |
| 327 | |
James Hogan | 6429e2b | 2015-01-29 11:14:09 +0000 | [diff] [blame] | 328 | return irq_create_mapping(gic_irq_domain, |
| 329 | GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_FDC)); |
| 330 | } |
| 331 | |
Alex Smith | c0a9f72 | 2015-10-12 10:40:43 +0100 | [diff] [blame] | 332 | int gic_get_usm_range(struct resource *gic_usm_res) |
| 333 | { |
| 334 | if (!gic_present) |
| 335 | return -1; |
| 336 | |
| 337 | gic_usm_res->start = __gic_base_addr + USM_VISIBLE_SECTION_OFS; |
| 338 | gic_usm_res->end = gic_usm_res->start + (USM_VISIBLE_SECTION_SIZE - 1); |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 343 | static void gic_handle_shared_int(bool chained) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 344 | { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 345 | unsigned int i, intr, virq, gic_reg_step = mips_cm_is64 ? 8 : 4; |
Andrew Bresticker | 8f5ee79 | 2014-10-20 12:03:56 -0700 | [diff] [blame] | 346 | unsigned long *pcpu_mask; |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 347 | unsigned long pending_reg, intrmask_reg; |
Andrew Bresticker | 8f5ee79 | 2014-10-20 12:03:56 -0700 | [diff] [blame] | 348 | DECLARE_BITMAP(pending, GIC_MAX_INTRS); |
| 349 | DECLARE_BITMAP(intrmask, GIC_MAX_INTRS); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 350 | |
| 351 | /* Get per-cpu bitmaps */ |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 352 | pcpu_mask = pcpu_masks[smp_processor_id()].pcpu_mask; |
| 353 | |
Andrew Bresticker | 824f3f7 | 2014-10-20 12:03:54 -0700 | [diff] [blame] | 354 | pending_reg = GIC_REG(SHARED, GIC_SH_PEND); |
| 355 | intrmask_reg = GIC_REG(SHARED, GIC_SH_MASK); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 356 | |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 357 | for (i = 0; i < BITS_TO_LONGS(gic_shared_intrs); i++) { |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 358 | pending[i] = gic_read(pending_reg); |
| 359 | intrmask[i] = gic_read(intrmask_reg); |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 360 | pending_reg += gic_reg_step; |
| 361 | intrmask_reg += gic_reg_step; |
Paul Burton | d77d5ac | 2015-09-22 11:29:11 -0700 | [diff] [blame] | 362 | |
Masahiro Yamada | 97f2645 | 2016-08-03 13:45:50 -0700 | [diff] [blame] | 363 | if (!IS_ENABLED(CONFIG_64BIT) || mips_cm_is64) |
Paul Burton | d77d5ac | 2015-09-22 11:29:11 -0700 | [diff] [blame] | 364 | continue; |
| 365 | |
| 366 | pending[i] |= (u64)gic_read(pending_reg) << 32; |
| 367 | intrmask[i] |= (u64)gic_read(intrmask_reg) << 32; |
| 368 | pending_reg += gic_reg_step; |
| 369 | intrmask_reg += gic_reg_step; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 370 | } |
| 371 | |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 372 | bitmap_and(pending, pending, intrmask, gic_shared_intrs); |
| 373 | bitmap_and(pending, pending, pcpu_mask, gic_shared_intrs); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 374 | |
Paul Burton | cae750b | 2016-08-19 18:11:19 +0100 | [diff] [blame] | 375 | for_each_set_bit(intr, pending, gic_shared_intrs) { |
Qais Yousef | d7eb4f2 | 2015-01-19 11:51:29 +0000 | [diff] [blame] | 376 | virq = irq_linear_revmap(gic_irq_domain, |
| 377 | GIC_SHARED_TO_HWIRQ(intr)); |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 378 | if (chained) |
| 379 | generic_handle_irq(virq); |
| 380 | else |
| 381 | do_IRQ(virq); |
Qais Yousef | d7eb4f2 | 2015-01-19 11:51:29 +0000 | [diff] [blame] | 382 | } |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 383 | } |
| 384 | |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 385 | static void gic_mask_irq(struct irq_data *d) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 386 | { |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 387 | gic_reset_mask(GIC_HWIRQ_TO_SHARED(d->hwirq)); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 388 | } |
| 389 | |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 390 | static void gic_unmask_irq(struct irq_data *d) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 391 | { |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 392 | gic_set_mask(GIC_HWIRQ_TO_SHARED(d->hwirq)); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 393 | } |
| 394 | |
Andrew Bresticker | 5561c9e | 2014-09-18 14:47:20 -0700 | [diff] [blame] | 395 | static void gic_ack_irq(struct irq_data *d) |
| 396 | { |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 397 | unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq); |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 398 | |
Andrew Bresticker | 53a7bc8 | 2014-10-20 12:03:57 -0700 | [diff] [blame] | 399 | gic_write(GIC_REG(SHARED, GIC_SH_WEDGE), GIC_SH_WEDGE_CLR(irq)); |
Andrew Bresticker | 5561c9e | 2014-09-18 14:47:20 -0700 | [diff] [blame] | 400 | } |
| 401 | |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 402 | static int gic_set_type(struct irq_data *d, unsigned int type) |
| 403 | { |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 404 | unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 405 | unsigned long flags; |
| 406 | bool is_edge; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 407 | |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 408 | spin_lock_irqsave(&gic_lock, flags); |
| 409 | switch (type & IRQ_TYPE_SENSE_MASK) { |
| 410 | case IRQ_TYPE_EDGE_FALLING: |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 411 | gic_set_polarity(irq, GIC_POL_NEG); |
| 412 | gic_set_trigger(irq, GIC_TRIG_EDGE); |
| 413 | gic_set_dual_edge(irq, GIC_TRIG_DUAL_DISABLE); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 414 | is_edge = true; |
| 415 | break; |
| 416 | case IRQ_TYPE_EDGE_RISING: |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 417 | gic_set_polarity(irq, GIC_POL_POS); |
| 418 | gic_set_trigger(irq, GIC_TRIG_EDGE); |
| 419 | gic_set_dual_edge(irq, GIC_TRIG_DUAL_DISABLE); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 420 | is_edge = true; |
| 421 | break; |
| 422 | case IRQ_TYPE_EDGE_BOTH: |
| 423 | /* polarity is irrelevant in this case */ |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 424 | gic_set_trigger(irq, GIC_TRIG_EDGE); |
| 425 | gic_set_dual_edge(irq, GIC_TRIG_DUAL_ENABLE); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 426 | is_edge = true; |
| 427 | break; |
| 428 | case IRQ_TYPE_LEVEL_LOW: |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 429 | gic_set_polarity(irq, GIC_POL_NEG); |
| 430 | gic_set_trigger(irq, GIC_TRIG_LEVEL); |
| 431 | gic_set_dual_edge(irq, GIC_TRIG_DUAL_DISABLE); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 432 | is_edge = false; |
| 433 | break; |
| 434 | case IRQ_TYPE_LEVEL_HIGH: |
| 435 | default: |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 436 | gic_set_polarity(irq, GIC_POL_POS); |
| 437 | gic_set_trigger(irq, GIC_TRIG_LEVEL); |
| 438 | gic_set_dual_edge(irq, GIC_TRIG_DUAL_DISABLE); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 439 | is_edge = false; |
| 440 | break; |
| 441 | } |
| 442 | |
Thomas Gleixner | a595fc5 | 2015-06-23 14:41:25 +0200 | [diff] [blame] | 443 | if (is_edge) |
| 444 | irq_set_chip_handler_name_locked(d, &gic_edge_irq_controller, |
| 445 | handle_edge_irq, NULL); |
| 446 | else |
| 447 | irq_set_chip_handler_name_locked(d, &gic_level_irq_controller, |
| 448 | handle_level_irq, NULL); |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 449 | spin_unlock_irqrestore(&gic_lock, flags); |
| 450 | |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | #ifdef CONFIG_SMP |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 455 | static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask, |
| 456 | bool force) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 457 | { |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 458 | unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 459 | cpumask_t tmp = CPU_MASK_NONE; |
| 460 | unsigned long flags; |
| 461 | int i; |
| 462 | |
Rusty Russell | 0de2652 | 2008-12-13 21:20:26 +1030 | [diff] [blame] | 463 | cpumask_and(&tmp, cpumask, cpu_online_mask); |
Rusty Russell | f9b531f | 2015-03-05 10:49:16 +1030 | [diff] [blame] | 464 | if (cpumask_empty(&tmp)) |
Andrew Bresticker | 14d160a | 2014-09-18 14:47:22 -0700 | [diff] [blame] | 465 | return -EINVAL; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 466 | |
| 467 | /* Assumption : cpumask refers to a single CPU */ |
| 468 | spin_lock_irqsave(&gic_lock, flags); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 469 | |
Tony Wu | c214c03 | 2013-06-21 10:13:08 +0000 | [diff] [blame] | 470 | /* Re-route this IRQ */ |
Paul Burton | ab41f6c | 2015-09-22 11:29:10 -0700 | [diff] [blame] | 471 | gic_map_to_vpe(irq, mips_cm_vp_id(cpumask_first(&tmp))); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 472 | |
Tony Wu | c214c03 | 2013-06-21 10:13:08 +0000 | [diff] [blame] | 473 | /* Update the pcpu_masks */ |
Paul Burton | 91951f9 | 2016-04-21 11:31:54 +0100 | [diff] [blame] | 474 | for (i = 0; i < min(gic_vpes, NR_CPUS); i++) |
Tony Wu | c214c03 | 2013-06-21 10:13:08 +0000 | [diff] [blame] | 475 | clear_bit(irq, pcpu_masks[i].pcpu_mask); |
Rusty Russell | f9b531f | 2015-03-05 10:49:16 +1030 | [diff] [blame] | 476 | set_bit(irq, pcpu_masks[cpumask_first(&tmp)].pcpu_mask); |
Tony Wu | c214c03 | 2013-06-21 10:13:08 +0000 | [diff] [blame] | 477 | |
Jiang Liu | 72f86db | 2015-06-01 16:05:38 +0800 | [diff] [blame] | 478 | cpumask_copy(irq_data_get_affinity_mask(d), cpumask); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 479 | spin_unlock_irqrestore(&gic_lock, flags); |
| 480 | |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 481 | return IRQ_SET_MASK_OK_NOCOPY; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 482 | } |
| 483 | #endif |
| 484 | |
Andrew Bresticker | 4a6a3ea3 | 2014-09-18 14:47:26 -0700 | [diff] [blame] | 485 | static struct irq_chip gic_level_irq_controller = { |
| 486 | .name = "MIPS GIC", |
| 487 | .irq_mask = gic_mask_irq, |
| 488 | .irq_unmask = gic_unmask_irq, |
| 489 | .irq_set_type = gic_set_type, |
| 490 | #ifdef CONFIG_SMP |
| 491 | .irq_set_affinity = gic_set_affinity, |
| 492 | #endif |
| 493 | }; |
| 494 | |
| 495 | static struct irq_chip gic_edge_irq_controller = { |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 496 | .name = "MIPS GIC", |
Andrew Bresticker | 5561c9e | 2014-09-18 14:47:20 -0700 | [diff] [blame] | 497 | .irq_ack = gic_ack_irq, |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 498 | .irq_mask = gic_mask_irq, |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 499 | .irq_unmask = gic_unmask_irq, |
Andrew Bresticker | 95150ae | 2014-09-18 14:47:21 -0700 | [diff] [blame] | 500 | .irq_set_type = gic_set_type, |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 501 | #ifdef CONFIG_SMP |
Thomas Gleixner | 161d049 | 2011-03-23 21:08:58 +0000 | [diff] [blame] | 502 | .irq_set_affinity = gic_set_affinity, |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 503 | #endif |
Qais Yousef | bb11cff | 2015-12-08 13:20:28 +0000 | [diff] [blame] | 504 | .ipi_send_single = gic_send_ipi, |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 505 | }; |
| 506 | |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 507 | static void gic_handle_local_int(bool chained) |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 508 | { |
| 509 | unsigned long pending, masked; |
Qais Yousef | d7eb4f2 | 2015-01-19 11:51:29 +0000 | [diff] [blame] | 510 | unsigned int intr, virq; |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 511 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 512 | pending = gic_read32(GIC_REG(VPE_LOCAL, GIC_VPE_PEND)); |
| 513 | masked = gic_read32(GIC_REG(VPE_LOCAL, GIC_VPE_MASK)); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 514 | |
| 515 | bitmap_and(&pending, &pending, &masked, GIC_NUM_LOCAL_INTRS); |
| 516 | |
Paul Burton | 0f4ed15 | 2016-09-13 17:54:27 +0100 | [diff] [blame] | 517 | for_each_set_bit(intr, &pending, GIC_NUM_LOCAL_INTRS) { |
Qais Yousef | d7eb4f2 | 2015-01-19 11:51:29 +0000 | [diff] [blame] | 518 | virq = irq_linear_revmap(gic_irq_domain, |
| 519 | GIC_LOCAL_TO_HWIRQ(intr)); |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 520 | if (chained) |
| 521 | generic_handle_irq(virq); |
| 522 | else |
| 523 | do_IRQ(virq); |
Qais Yousef | d7eb4f2 | 2015-01-19 11:51:29 +0000 | [diff] [blame] | 524 | } |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | static void gic_mask_local_irq(struct irq_data *d) |
| 528 | { |
| 529 | int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); |
| 530 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 531 | gic_write32(GIC_REG(VPE_LOCAL, GIC_VPE_RMASK), 1 << intr); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | static void gic_unmask_local_irq(struct irq_data *d) |
| 535 | { |
| 536 | int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); |
| 537 | |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 538 | gic_write32(GIC_REG(VPE_LOCAL, GIC_VPE_SMASK), 1 << intr); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | static struct irq_chip gic_local_irq_controller = { |
| 542 | .name = "MIPS GIC Local", |
| 543 | .irq_mask = gic_mask_local_irq, |
| 544 | .irq_unmask = gic_unmask_local_irq, |
| 545 | }; |
| 546 | |
| 547 | static void gic_mask_local_irq_all_vpes(struct irq_data *d) |
| 548 | { |
| 549 | int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); |
| 550 | int i; |
| 551 | unsigned long flags; |
| 552 | |
| 553 | spin_lock_irqsave(&gic_lock, flags); |
| 554 | for (i = 0; i < gic_vpes; i++) { |
Paul Burton | d46812b | 2016-02-03 03:15:27 +0000 | [diff] [blame] | 555 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), |
| 556 | mips_cm_vp_id(i)); |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 557 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_RMASK), 1 << intr); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 558 | } |
| 559 | spin_unlock_irqrestore(&gic_lock, flags); |
| 560 | } |
| 561 | |
| 562 | static void gic_unmask_local_irq_all_vpes(struct irq_data *d) |
| 563 | { |
| 564 | int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); |
| 565 | int i; |
| 566 | unsigned long flags; |
| 567 | |
| 568 | spin_lock_irqsave(&gic_lock, flags); |
| 569 | for (i = 0; i < gic_vpes; i++) { |
Paul Burton | d46812b | 2016-02-03 03:15:27 +0000 | [diff] [blame] | 570 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), |
| 571 | mips_cm_vp_id(i)); |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 572 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_SMASK), 1 << intr); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 573 | } |
| 574 | spin_unlock_irqrestore(&gic_lock, flags); |
| 575 | } |
| 576 | |
| 577 | static struct irq_chip gic_all_vpes_local_irq_controller = { |
| 578 | .name = "MIPS GIC Local", |
| 579 | .irq_mask = gic_mask_local_irq_all_vpes, |
| 580 | .irq_unmask = gic_unmask_local_irq_all_vpes, |
| 581 | }; |
| 582 | |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 583 | static void __gic_irq_dispatch(void) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 584 | { |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 585 | gic_handle_local_int(false); |
| 586 | gic_handle_shared_int(false); |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 589 | static void gic_irq_dispatch(struct irq_desc *desc) |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 590 | { |
Rabin Vincent | 1b3ed36 | 2015-06-12 10:01:56 +0200 | [diff] [blame] | 591 | gic_handle_local_int(true); |
| 592 | gic_handle_shared_int(true); |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 593 | } |
| 594 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 595 | static void __init gic_basic_init(void) |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 596 | { |
| 597 | unsigned int i; |
Steven J. Hill | 98b67c3 | 2012-08-31 16:18:49 -0500 | [diff] [blame] | 598 | |
| 599 | board_bind_eic_interrupt = &gic_bind_eic_interrupt; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 600 | |
| 601 | /* Setup defaults */ |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 602 | for (i = 0; i < gic_shared_intrs; i++) { |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 603 | gic_set_polarity(i, GIC_POL_POS); |
| 604 | gic_set_trigger(i, GIC_TRIG_LEVEL); |
| 605 | gic_reset_mask(i); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 606 | } |
| 607 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 608 | for (i = 0; i < gic_vpes; i++) { |
| 609 | unsigned int j; |
| 610 | |
Paul Burton | d46812b | 2016-02-03 03:15:27 +0000 | [diff] [blame] | 611 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), |
| 612 | mips_cm_vp_id(i)); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 613 | for (j = 0; j < GIC_NUM_LOCAL_INTRS; j++) { |
| 614 | if (!gic_local_irq_is_routable(j)) |
| 615 | continue; |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 616 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_RMASK), 1 << j); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 617 | } |
| 618 | } |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 619 | } |
| 620 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 621 | static int gic_local_irq_domain_map(struct irq_domain *d, unsigned int virq, |
| 622 | irq_hw_number_t hw) |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 623 | { |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 624 | int intr = GIC_HWIRQ_TO_LOCAL(hw); |
| 625 | int ret = 0; |
| 626 | int i; |
| 627 | unsigned long flags; |
| 628 | |
| 629 | if (!gic_local_irq_is_routable(intr)) |
| 630 | return -EPERM; |
| 631 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 632 | spin_lock_irqsave(&gic_lock, flags); |
| 633 | for (i = 0; i < gic_vpes; i++) { |
| 634 | u32 val = GIC_MAP_TO_PIN_MSK | gic_cpu_pin; |
| 635 | |
Paul Burton | d46812b | 2016-02-03 03:15:27 +0000 | [diff] [blame] | 636 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), |
| 637 | mips_cm_vp_id(i)); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 638 | |
| 639 | switch (intr) { |
| 640 | case GIC_LOCAL_INT_WD: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 641 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_WD_MAP), val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 642 | break; |
| 643 | case GIC_LOCAL_INT_COMPARE: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 644 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_COMPARE_MAP), |
| 645 | val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 646 | break; |
| 647 | case GIC_LOCAL_INT_TIMER: |
James Hogan | 1b6af71 | 2015-01-19 15:38:24 +0000 | [diff] [blame] | 648 | /* CONFIG_MIPS_CMP workaround (see __gic_init) */ |
| 649 | val = GIC_MAP_TO_PIN_MSK | timer_cpu_pin; |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 650 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_TIMER_MAP), |
| 651 | val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 652 | break; |
| 653 | case GIC_LOCAL_INT_PERFCTR: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 654 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_PERFCTR_MAP), |
| 655 | val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 656 | break; |
| 657 | case GIC_LOCAL_INT_SWINT0: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 658 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_SWINT0_MAP), |
| 659 | val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 660 | break; |
| 661 | case GIC_LOCAL_INT_SWINT1: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 662 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_SWINT1_MAP), |
| 663 | val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 664 | break; |
| 665 | case GIC_LOCAL_INT_FDC: |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 666 | gic_write32(GIC_REG(VPE_OTHER, GIC_VPE_FDC_MAP), val); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 667 | break; |
| 668 | default: |
| 669 | pr_err("Invalid local IRQ %d\n", intr); |
| 670 | ret = -EINVAL; |
| 671 | break; |
| 672 | } |
| 673 | } |
| 674 | spin_unlock_irqrestore(&gic_lock, flags); |
| 675 | |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | static int gic_shared_irq_domain_map(struct irq_domain *d, unsigned int virq, |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 680 | irq_hw_number_t hw, unsigned int vpe) |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 681 | { |
| 682 | int intr = GIC_HWIRQ_TO_SHARED(hw); |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 683 | unsigned long flags; |
Qais Yousef | 78930f0 | 2015-12-08 13:20:26 +0000 | [diff] [blame] | 684 | int i; |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 685 | |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 686 | spin_lock_irqsave(&gic_lock, flags); |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 687 | gic_map_to_pin(intr, gic_cpu_pin); |
Paul Burton | 99ec8a3 | 2016-07-05 14:25:59 +0100 | [diff] [blame] | 688 | gic_map_to_vpe(intr, mips_cm_vp_id(vpe)); |
Paul Burton | 91951f9 | 2016-04-21 11:31:54 +0100 | [diff] [blame] | 689 | for (i = 0; i < min(gic_vpes, NR_CPUS); i++) |
Qais Yousef | 78930f0 | 2015-12-08 13:20:26 +0000 | [diff] [blame] | 690 | clear_bit(intr, pcpu_masks[i].pcpu_mask); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 691 | set_bit(intr, pcpu_masks[vpe].pcpu_mask); |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 692 | spin_unlock_irqrestore(&gic_lock, flags); |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 697 | static int gic_setup_dev_chip(struct irq_domain *d, unsigned int virq, |
| 698 | unsigned int hwirq) |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 699 | { |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 700 | struct irq_chip *chip; |
| 701 | int err; |
Paul Burton | 6a33fa2 | 2016-08-19 18:07:14 +0100 | [diff] [blame] | 702 | |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 703 | if (hwirq >= GIC_SHARED_HWIRQ_BASE) { |
| 704 | err = irq_domain_set_hwirq_and_chip(d, virq, hwirq, |
| 705 | &gic_level_irq_controller, |
| 706 | NULL); |
| 707 | } else { |
| 708 | switch (GIC_HWIRQ_TO_LOCAL(hwirq)) { |
| 709 | case GIC_LOCAL_INT_TIMER: |
| 710 | case GIC_LOCAL_INT_PERFCTR: |
| 711 | case GIC_LOCAL_INT_FDC: |
| 712 | /* |
| 713 | * HACK: These are all really percpu interrupts, but |
| 714 | * the rest of the MIPS kernel code does not use the |
| 715 | * percpu IRQ API for them. |
| 716 | */ |
| 717 | chip = &gic_all_vpes_local_irq_controller; |
| 718 | irq_set_handler(virq, handle_percpu_irq); |
| 719 | break; |
Paul Burton | 6a33fa2 | 2016-08-19 18:07:14 +0100 | [diff] [blame] | 720 | |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 721 | default: |
| 722 | chip = &gic_local_irq_controller; |
| 723 | irq_set_handler(virq, handle_percpu_devid_irq); |
| 724 | irq_set_percpu_devid(virq); |
| 725 | break; |
| 726 | } |
| 727 | |
| 728 | err = irq_domain_set_hwirq_and_chip(d, virq, hwirq, |
| 729 | chip, NULL); |
| 730 | } |
| 731 | |
| 732 | return err; |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 733 | } |
| 734 | |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 735 | static int gic_irq_domain_alloc(struct irq_domain *d, unsigned int virq, |
| 736 | unsigned int nr_irqs, void *arg) |
| 737 | { |
| 738 | struct gic_irq_spec *spec = arg; |
| 739 | irq_hw_number_t hwirq, base_hwirq; |
| 740 | int cpu, ret, i; |
| 741 | |
| 742 | if (spec->type == GIC_DEVICE) { |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 743 | /* verify that shared irqs don't conflict with an IPI irq */ |
| 744 | if ((spec->hwirq >= GIC_SHARED_HWIRQ_BASE) && |
| 745 | test_bit(GIC_HWIRQ_TO_SHARED(spec->hwirq), ipi_resrv)) |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 746 | return -EBUSY; |
Harvey Hunt | 4b2312b | 2016-05-23 12:05:52 +0100 | [diff] [blame] | 747 | |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 748 | return gic_setup_dev_chip(d, virq, spec->hwirq); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 749 | } else { |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 750 | base_hwirq = find_first_bit(ipi_available, gic_shared_intrs); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 751 | if (base_hwirq == gic_shared_intrs) { |
| 752 | return -ENOMEM; |
| 753 | } |
| 754 | |
| 755 | /* check that we have enough space */ |
| 756 | for (i = base_hwirq; i < nr_irqs; i++) { |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 757 | if (!test_bit(i, ipi_available)) |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 758 | return -EBUSY; |
| 759 | } |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 760 | bitmap_clear(ipi_available, base_hwirq, nr_irqs); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 761 | |
| 762 | /* map the hwirq for each cpu consecutively */ |
| 763 | i = 0; |
| 764 | for_each_cpu(cpu, spec->ipimask) { |
| 765 | hwirq = GIC_SHARED_TO_HWIRQ(base_hwirq + i); |
| 766 | |
| 767 | ret = irq_domain_set_hwirq_and_chip(d, virq + i, hwirq, |
Paul Burton | 6a33fa2 | 2016-08-19 18:07:14 +0100 | [diff] [blame] | 768 | &gic_level_irq_controller, |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 769 | NULL); |
| 770 | if (ret) |
| 771 | goto error; |
| 772 | |
Paul Burton | 6a33fa2 | 2016-08-19 18:07:14 +0100 | [diff] [blame] | 773 | irq_set_handler(virq + i, handle_level_irq); |
| 774 | |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 775 | ret = gic_shared_irq_domain_map(d, virq + i, hwirq, cpu); |
| 776 | if (ret) |
| 777 | goto error; |
| 778 | |
| 779 | i++; |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * tell the parent about the base hwirq we allocated so it can |
| 784 | * set its own domain data |
| 785 | */ |
| 786 | spec->hwirq = base_hwirq; |
| 787 | } |
| 788 | |
| 789 | return 0; |
| 790 | error: |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 791 | bitmap_set(ipi_available, base_hwirq, nr_irqs); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 792 | return ret; |
| 793 | } |
| 794 | |
| 795 | void gic_irq_domain_free(struct irq_domain *d, unsigned int virq, |
| 796 | unsigned int nr_irqs) |
| 797 | { |
| 798 | irq_hw_number_t base_hwirq; |
| 799 | struct irq_data *data; |
| 800 | |
| 801 | data = irq_get_irq_data(virq); |
| 802 | if (!data) |
| 803 | return; |
| 804 | |
| 805 | base_hwirq = GIC_HWIRQ_TO_SHARED(irqd_to_hwirq(data)); |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 806 | bitmap_set(ipi_available, base_hwirq, nr_irqs); |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 807 | } |
| 808 | |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 809 | int gic_irq_domain_match(struct irq_domain *d, struct device_node *node, |
| 810 | enum irq_domain_bus_token bus_token) |
| 811 | { |
| 812 | /* this domain should'nt be accessed directly */ |
| 813 | return 0; |
| 814 | } |
| 815 | |
Krzysztof Kozlowski | 9600973 | 2015-04-27 21:54:24 +0900 | [diff] [blame] | 816 | static const struct irq_domain_ops gic_irq_domain_ops = { |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 817 | .alloc = gic_irq_domain_alloc, |
| 818 | .free = gic_irq_domain_free, |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 819 | .match = gic_irq_domain_match, |
| 820 | }; |
| 821 | |
| 822 | static int gic_dev_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, |
| 823 | const u32 *intspec, unsigned int intsize, |
| 824 | irq_hw_number_t *out_hwirq, |
| 825 | unsigned int *out_type) |
| 826 | { |
| 827 | if (intsize != 3) |
| 828 | return -EINVAL; |
| 829 | |
| 830 | if (intspec[0] == GIC_SHARED) |
| 831 | *out_hwirq = GIC_SHARED_TO_HWIRQ(intspec[1]); |
| 832 | else if (intspec[0] == GIC_LOCAL) |
| 833 | *out_hwirq = GIC_LOCAL_TO_HWIRQ(intspec[1]); |
| 834 | else |
| 835 | return -EINVAL; |
| 836 | *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK; |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | static int gic_dev_domain_alloc(struct irq_domain *d, unsigned int virq, |
| 842 | unsigned int nr_irqs, void *arg) |
| 843 | { |
| 844 | struct irq_fwspec *fwspec = arg; |
| 845 | struct gic_irq_spec spec = { |
| 846 | .type = GIC_DEVICE, |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 847 | }; |
| 848 | int i, ret; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 849 | |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 850 | if (fwspec->param[0] == GIC_SHARED) |
| 851 | spec.hwirq = GIC_SHARED_TO_HWIRQ(fwspec->param[1]); |
| 852 | else |
| 853 | spec.hwirq = GIC_LOCAL_TO_HWIRQ(fwspec->param[1]); |
| 854 | |
| 855 | ret = irq_domain_alloc_irqs_parent(d, virq, nr_irqs, &spec); |
| 856 | if (ret) |
| 857 | return ret; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 858 | |
| 859 | for (i = 0; i < nr_irqs; i++) { |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 860 | ret = gic_setup_dev_chip(d, virq + i, spec.hwirq + i); |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 861 | if (ret) |
Harvey Hunt | 4b2312b | 2016-05-23 12:05:52 +0100 | [diff] [blame] | 862 | goto error; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | return 0; |
Harvey Hunt | 4b2312b | 2016-05-23 12:05:52 +0100 | [diff] [blame] | 866 | |
| 867 | error: |
| 868 | irq_domain_free_irqs_parent(d, virq, nr_irqs); |
| 869 | return ret; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | void gic_dev_domain_free(struct irq_domain *d, unsigned int virq, |
| 873 | unsigned int nr_irqs) |
| 874 | { |
| 875 | /* no real allocation is done for dev irqs, so no need to free anything */ |
| 876 | return; |
| 877 | } |
| 878 | |
Paul Burton | 2564970 | 2016-08-19 18:07:15 +0100 | [diff] [blame] | 879 | static void gic_dev_domain_activate(struct irq_domain *domain, |
| 880 | struct irq_data *d) |
| 881 | { |
Paul Burton | e875bd6 | 2016-09-13 17:53:35 +0100 | [diff] [blame] | 882 | if (GIC_HWIRQ_TO_LOCAL(d->hwirq) < GIC_NUM_LOCAL_INTRS) |
| 883 | gic_local_irq_domain_map(domain, d->irq, d->hwirq); |
| 884 | else |
| 885 | gic_shared_irq_domain_map(domain, d->irq, d->hwirq, 0); |
Paul Burton | 2564970 | 2016-08-19 18:07:15 +0100 | [diff] [blame] | 886 | } |
| 887 | |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 888 | static struct irq_domain_ops gic_dev_domain_ops = { |
| 889 | .xlate = gic_dev_domain_xlate, |
| 890 | .alloc = gic_dev_domain_alloc, |
| 891 | .free = gic_dev_domain_free, |
Paul Burton | 2564970 | 2016-08-19 18:07:15 +0100 | [diff] [blame] | 892 | .activate = gic_dev_domain_activate, |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 893 | }; |
| 894 | |
| 895 | static int gic_ipi_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, |
| 896 | const u32 *intspec, unsigned int intsize, |
| 897 | irq_hw_number_t *out_hwirq, |
| 898 | unsigned int *out_type) |
| 899 | { |
| 900 | /* |
| 901 | * There's nothing to translate here. hwirq is dynamically allocated and |
| 902 | * the irq type is always edge triggered. |
| 903 | * */ |
| 904 | *out_hwirq = 0; |
| 905 | *out_type = IRQ_TYPE_EDGE_RISING; |
| 906 | |
| 907 | return 0; |
| 908 | } |
| 909 | |
| 910 | static int gic_ipi_domain_alloc(struct irq_domain *d, unsigned int virq, |
| 911 | unsigned int nr_irqs, void *arg) |
| 912 | { |
| 913 | struct cpumask *ipimask = arg; |
| 914 | struct gic_irq_spec spec = { |
| 915 | .type = GIC_IPI, |
| 916 | .ipimask = ipimask |
| 917 | }; |
| 918 | int ret, i; |
| 919 | |
| 920 | ret = irq_domain_alloc_irqs_parent(d, virq, nr_irqs, &spec); |
| 921 | if (ret) |
| 922 | return ret; |
| 923 | |
| 924 | /* the parent should have set spec.hwirq to the base_hwirq it allocated */ |
| 925 | for (i = 0; i < nr_irqs; i++) { |
| 926 | ret = irq_domain_set_hwirq_and_chip(d, virq + i, |
| 927 | GIC_SHARED_TO_HWIRQ(spec.hwirq + i), |
| 928 | &gic_edge_irq_controller, |
| 929 | NULL); |
| 930 | if (ret) |
| 931 | goto error; |
| 932 | |
| 933 | ret = irq_set_irq_type(virq + i, IRQ_TYPE_EDGE_RISING); |
| 934 | if (ret) |
| 935 | goto error; |
| 936 | } |
| 937 | |
| 938 | return 0; |
| 939 | error: |
| 940 | irq_domain_free_irqs_parent(d, virq, nr_irqs); |
| 941 | return ret; |
| 942 | } |
| 943 | |
| 944 | void gic_ipi_domain_free(struct irq_domain *d, unsigned int virq, |
| 945 | unsigned int nr_irqs) |
| 946 | { |
| 947 | irq_domain_free_irqs_parent(d, virq, nr_irqs); |
| 948 | } |
| 949 | |
| 950 | int gic_ipi_domain_match(struct irq_domain *d, struct device_node *node, |
| 951 | enum irq_domain_bus_token bus_token) |
| 952 | { |
| 953 | bool is_ipi; |
| 954 | |
| 955 | switch (bus_token) { |
| 956 | case DOMAIN_BUS_IPI: |
| 957 | is_ipi = d->bus_token == bus_token; |
Paul Burton | 547aefc | 2016-07-05 14:26:00 +0100 | [diff] [blame] | 958 | return (!node || to_of_node(d->fwnode) == node) && is_ipi; |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 959 | break; |
| 960 | default: |
| 961 | return 0; |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | static struct irq_domain_ops gic_ipi_domain_ops = { |
| 966 | .xlate = gic_ipi_domain_xlate, |
| 967 | .alloc = gic_ipi_domain_alloc, |
| 968 | .free = gic_ipi_domain_free, |
| 969 | .match = gic_ipi_domain_match, |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 970 | }; |
| 971 | |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 972 | static void __init __gic_init(unsigned long gic_base_addr, |
| 973 | unsigned long gic_addrspace_size, |
| 974 | unsigned int cpu_vec, unsigned int irqbase, |
| 975 | struct device_node *node) |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 976 | { |
Paul Burton | ba01cf0 | 2016-05-17 15:31:06 +0100 | [diff] [blame] | 977 | unsigned int gicconfig, cpu; |
Qais Yousef | 16a8083 | 2015-12-08 13:20:30 +0000 | [diff] [blame] | 978 | unsigned int v[2]; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 979 | |
Alex Smith | c0a9f72 | 2015-10-12 10:40:43 +0100 | [diff] [blame] | 980 | __gic_base_addr = gic_base_addr; |
| 981 | |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 982 | gic_base = ioremap_nocache(gic_base_addr, gic_addrspace_size); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 983 | |
Andrew Bresticker | 5f68fea | 2014-10-20 12:03:52 -0700 | [diff] [blame] | 984 | gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG)); |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 985 | gic_shared_intrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 986 | GIC_SH_CONFIG_NUMINTRS_SHF; |
Andrew Bresticker | fbd5524 | 2014-09-18 14:47:25 -0700 | [diff] [blame] | 987 | gic_shared_intrs = ((gic_shared_intrs + 1) * 8); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 988 | |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 989 | gic_vpes = (gicconfig & GIC_SH_CONFIG_NUMVPES_MSK) >> |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 990 | GIC_SH_CONFIG_NUMVPES_SHF; |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 991 | gic_vpes = gic_vpes + 1; |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 992 | |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 993 | if (cpu_has_veic) { |
Paul Burton | ba01cf0 | 2016-05-17 15:31:06 +0100 | [diff] [blame] | 994 | /* Set EIC mode for all VPEs */ |
| 995 | for_each_present_cpu(cpu) { |
| 996 | gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR), |
| 997 | mips_cm_vp_id(cpu)); |
| 998 | gic_write(GIC_REG(VPE_OTHER, GIC_VPE_CTL), |
| 999 | GIC_VPE_CTL_EIC_MODE_MSK); |
| 1000 | } |
| 1001 | |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 1002 | /* Always use vector 1 in EIC mode */ |
| 1003 | gic_cpu_pin = 0; |
James Hogan | 1b6af71 | 2015-01-19 15:38:24 +0000 | [diff] [blame] | 1004 | timer_cpu_pin = gic_cpu_pin; |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 1005 | set_vi_handler(gic_cpu_pin + GIC_PIN_TO_VEC_OFFSET, |
| 1006 | __gic_irq_dispatch); |
| 1007 | } else { |
| 1008 | gic_cpu_pin = cpu_vec - GIC_CPU_PIN_OFFSET; |
| 1009 | irq_set_chained_handler(MIPS_CPU_IRQ_BASE + cpu_vec, |
| 1010 | gic_irq_dispatch); |
James Hogan | 1b6af71 | 2015-01-19 15:38:24 +0000 | [diff] [blame] | 1011 | /* |
| 1012 | * With the CMP implementation of SMP (deprecated), other CPUs |
| 1013 | * are started by the bootloader and put into a timer based |
| 1014 | * waiting poll loop. We must not re-route those CPU's local |
| 1015 | * timer interrupts as the wait instruction will never finish, |
| 1016 | * so just handle whatever CPU interrupt it is routed to by |
| 1017 | * default. |
| 1018 | * |
| 1019 | * This workaround should be removed when CMP support is |
| 1020 | * dropped. |
| 1021 | */ |
| 1022 | if (IS_ENABLED(CONFIG_MIPS_CMP) && |
| 1023 | gic_local_irq_is_routable(GIC_LOCAL_INT_TIMER)) { |
Markos Chandras | c3f57f0 | 2015-07-14 10:26:09 +0100 | [diff] [blame] | 1024 | timer_cpu_pin = gic_read32(GIC_REG(VPE_LOCAL, |
James Hogan | 1b6af71 | 2015-01-19 15:38:24 +0000 | [diff] [blame] | 1025 | GIC_VPE_TIMER_MAP)) & |
| 1026 | GIC_MAP_MSK; |
| 1027 | irq_set_chained_handler(MIPS_CPU_IRQ_BASE + |
| 1028 | GIC_CPU_PIN_OFFSET + |
| 1029 | timer_cpu_pin, |
| 1030 | gic_irq_dispatch); |
| 1031 | } else { |
| 1032 | timer_cpu_pin = gic_cpu_pin; |
| 1033 | } |
Andrew Bresticker | 18743d2 | 2014-09-18 14:47:24 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 1036 | gic_irq_domain = irq_domain_add_simple(node, GIC_NUM_LOCAL_INTRS + |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 1037 | gic_shared_intrs, irqbase, |
Andrew Bresticker | c49581a | 2014-09-18 14:47:23 -0700 | [diff] [blame] | 1038 | &gic_irq_domain_ops, NULL); |
| 1039 | if (!gic_irq_domain) |
| 1040 | panic("Failed to add GIC IRQ domain"); |
Harvey Hunt | 21c57fd | 2016-05-23 12:07:37 +0100 | [diff] [blame] | 1041 | gic_irq_domain->name = "mips-gic-irq"; |
Steven J. Hill | 0b271f5 | 2012-08-31 16:05:37 -0500 | [diff] [blame] | 1042 | |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 1043 | gic_dev_domain = irq_domain_add_hierarchy(gic_irq_domain, 0, |
| 1044 | GIC_NUM_LOCAL_INTRS + gic_shared_intrs, |
| 1045 | node, &gic_dev_domain_ops, NULL); |
| 1046 | if (!gic_dev_domain) |
| 1047 | panic("Failed to add GIC DEV domain"); |
Harvey Hunt | 21c57fd | 2016-05-23 12:07:37 +0100 | [diff] [blame] | 1048 | gic_dev_domain->name = "mips-gic-dev"; |
Qais Yousef | c98c1822 | 2015-12-08 13:20:24 +0000 | [diff] [blame] | 1049 | |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 1050 | gic_ipi_domain = irq_domain_add_hierarchy(gic_irq_domain, |
| 1051 | IRQ_DOMAIN_FLAG_IPI_PER_CPU, |
| 1052 | GIC_NUM_LOCAL_INTRS + gic_shared_intrs, |
| 1053 | node, &gic_ipi_domain_ops, NULL); |
| 1054 | if (!gic_ipi_domain) |
| 1055 | panic("Failed to add GIC IPI domain"); |
| 1056 | |
Harvey Hunt | 21c57fd | 2016-05-23 12:07:37 +0100 | [diff] [blame] | 1057 | gic_ipi_domain->name = "mips-gic-ipi"; |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 1058 | gic_ipi_domain->bus_token = DOMAIN_BUS_IPI; |
| 1059 | |
Qais Yousef | 16a8083 | 2015-12-08 13:20:30 +0000 | [diff] [blame] | 1060 | if (node && |
| 1061 | !of_property_read_u32_array(node, "mti,reserved-ipi-vectors", v, 2)) { |
| 1062 | bitmap_set(ipi_resrv, v[0], v[1]); |
| 1063 | } else { |
| 1064 | /* Make the last 2 * gic_vpes available for IPIs */ |
| 1065 | bitmap_set(ipi_resrv, |
| 1066 | gic_shared_intrs - 2 * gic_vpes, |
| 1067 | 2 * gic_vpes); |
| 1068 | } |
Qais Yousef | 2af70a9 | 2015-12-08 13:20:23 +0000 | [diff] [blame] | 1069 | |
Paul Burton | 994f316 | 2017-04-20 10:07:34 +0100 | [diff] [blame] | 1070 | bitmap_copy(ipi_available, ipi_resrv, GIC_MAX_INTRS); |
Andrew Bresticker | e9de688 | 2014-09-18 14:47:27 -0700 | [diff] [blame] | 1071 | gic_basic_init(); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1072 | } |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 1073 | |
| 1074 | void __init gic_init(unsigned long gic_base_addr, |
| 1075 | unsigned long gic_addrspace_size, |
| 1076 | unsigned int cpu_vec, unsigned int irqbase) |
| 1077 | { |
| 1078 | __gic_init(gic_base_addr, gic_addrspace_size, cpu_vec, irqbase, NULL); |
| 1079 | } |
| 1080 | |
| 1081 | static int __init gic_of_init(struct device_node *node, |
| 1082 | struct device_node *parent) |
| 1083 | { |
| 1084 | struct resource res; |
| 1085 | unsigned int cpu_vec, i = 0, reserved = 0; |
| 1086 | phys_addr_t gic_base; |
| 1087 | size_t gic_len; |
| 1088 | |
| 1089 | /* Find the first available CPU vector. */ |
| 1090 | while (!of_property_read_u32_index(node, "mti,reserved-cpu-vectors", |
| 1091 | i++, &cpu_vec)) |
| 1092 | reserved |= BIT(cpu_vec); |
| 1093 | for (cpu_vec = 2; cpu_vec < 8; cpu_vec++) { |
| 1094 | if (!(reserved & BIT(cpu_vec))) |
| 1095 | break; |
| 1096 | } |
| 1097 | if (cpu_vec == 8) { |
| 1098 | pr_err("No CPU vectors available for GIC\n"); |
| 1099 | return -ENODEV; |
| 1100 | } |
| 1101 | |
| 1102 | if (of_address_to_resource(node, 0, &res)) { |
| 1103 | /* |
| 1104 | * Probe the CM for the GIC base address if not specified |
| 1105 | * in the device-tree. |
| 1106 | */ |
| 1107 | if (mips_cm_present()) { |
| 1108 | gic_base = read_gcr_gic_base() & |
| 1109 | ~CM_GCR_GIC_BASE_GICEN_MSK; |
| 1110 | gic_len = 0x20000; |
| 1111 | } else { |
| 1112 | pr_err("Failed to get GIC memory range\n"); |
| 1113 | return -ENODEV; |
| 1114 | } |
| 1115 | } else { |
| 1116 | gic_base = res.start; |
| 1117 | gic_len = resource_size(&res); |
| 1118 | } |
| 1119 | |
James Hogan | 3156213 | 2017-08-12 21:36:09 -0700 | [diff] [blame] | 1120 | if (mips_cm_present()) { |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 1121 | write_gcr_gic_base(gic_base | CM_GCR_GIC_BASE_GICEN_MSK); |
James Hogan | 3156213 | 2017-08-12 21:36:09 -0700 | [diff] [blame] | 1122 | /* Ensure GIC region is enabled before trying to access it */ |
| 1123 | __sync(); |
| 1124 | } |
Andrew Bresticker | a705727 | 2014-11-12 11:43:38 -0800 | [diff] [blame] | 1125 | gic_present = true; |
| 1126 | |
| 1127 | __gic_init(gic_base, gic_len, cpu_vec, 0, node); |
| 1128 | |
| 1129 | return 0; |
| 1130 | } |
| 1131 | IRQCHIP_DECLARE(mips_gic, "mti,gic", gic_of_init); |