2 * Copyright © 2017 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #ifndef __INTEL_UNCORE_H__
26 #define __INTEL_UNCORE_H__
28 #include <linux/spinlock.h>
29 #include <linux/notifier.h>
30 #include <linux/hrtimer.h>
31 #include <linux/io-64-nonatomic-lo-hi.h>
32 #include <linux/types.h>
34 #include "i915_reg_defs.h"
36 struct drm_i915_private;
37 struct intel_runtime_pm;
41 struct intel_uncore_mmio_debug {
42 spinlock_t lock; /** lock is also taken in irq contexts. */
43 int unclaimed_mmio_check;
48 enum forcewake_domain_id {
49 FW_DOMAIN_ID_RENDER = 0,
50 FW_DOMAIN_ID_GT, /* also includes blitter engine */
52 FW_DOMAIN_ID_MEDIA_VDBOX0,
53 FW_DOMAIN_ID_MEDIA_VDBOX1,
54 FW_DOMAIN_ID_MEDIA_VDBOX2,
55 FW_DOMAIN_ID_MEDIA_VDBOX3,
56 FW_DOMAIN_ID_MEDIA_VDBOX4,
57 FW_DOMAIN_ID_MEDIA_VDBOX5,
58 FW_DOMAIN_ID_MEDIA_VDBOX6,
59 FW_DOMAIN_ID_MEDIA_VDBOX7,
60 FW_DOMAIN_ID_MEDIA_VEBOX0,
61 FW_DOMAIN_ID_MEDIA_VEBOX1,
62 FW_DOMAIN_ID_MEDIA_VEBOX2,
63 FW_DOMAIN_ID_MEDIA_VEBOX3,
68 enum forcewake_domains {
69 FORCEWAKE_RENDER = BIT(FW_DOMAIN_ID_RENDER),
70 FORCEWAKE_GT = BIT(FW_DOMAIN_ID_GT),
71 FORCEWAKE_MEDIA = BIT(FW_DOMAIN_ID_MEDIA),
72 FORCEWAKE_MEDIA_VDBOX0 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX0),
73 FORCEWAKE_MEDIA_VDBOX1 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX1),
74 FORCEWAKE_MEDIA_VDBOX2 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX2),
75 FORCEWAKE_MEDIA_VDBOX3 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX3),
76 FORCEWAKE_MEDIA_VDBOX4 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX4),
77 FORCEWAKE_MEDIA_VDBOX5 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX5),
78 FORCEWAKE_MEDIA_VDBOX6 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX6),
79 FORCEWAKE_MEDIA_VDBOX7 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX7),
80 FORCEWAKE_MEDIA_VEBOX0 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX0),
81 FORCEWAKE_MEDIA_VEBOX1 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX1),
82 FORCEWAKE_MEDIA_VEBOX2 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX2),
83 FORCEWAKE_MEDIA_VEBOX3 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX3),
85 FORCEWAKE_ALL = BIT(FW_DOMAIN_ID_COUNT) - 1,
88 struct intel_uncore_fw_get {
89 void (*force_wake_get)(struct intel_uncore *uncore,
90 enum forcewake_domains domains);
93 struct intel_uncore_funcs {
94 enum forcewake_domains (*read_fw_domains)(struct intel_uncore *uncore,
96 enum forcewake_domains (*write_fw_domains)(struct intel_uncore *uncore,
99 u8 (*mmio_readb)(struct intel_uncore *uncore,
100 i915_reg_t r, bool trace);
101 u16 (*mmio_readw)(struct intel_uncore *uncore,
102 i915_reg_t r, bool trace);
103 u32 (*mmio_readl)(struct intel_uncore *uncore,
104 i915_reg_t r, bool trace);
105 u64 (*mmio_readq)(struct intel_uncore *uncore,
106 i915_reg_t r, bool trace);
108 void (*mmio_writeb)(struct intel_uncore *uncore,
109 i915_reg_t r, u8 val, bool trace);
110 void (*mmio_writew)(struct intel_uncore *uncore,
111 i915_reg_t r, u16 val, bool trace);
112 void (*mmio_writel)(struct intel_uncore *uncore,
113 i915_reg_t r, u32 val, bool trace);
116 struct intel_forcewake_range {
120 enum forcewake_domains domains;
123 /* Other register ranges (e.g., shadow tables, MCR tables, etc.) */
129 struct intel_uncore {
132 struct drm_i915_private *i915;
134 struct intel_runtime_pm *rpm;
136 spinlock_t lock; /** lock is also taken in irq contexts. */
139 #define UNCORE_HAS_FORCEWAKE BIT(0)
140 #define UNCORE_HAS_FPGA_DBG_UNCLAIMED BIT(1)
141 #define UNCORE_HAS_DBG_UNCLAIMED BIT(2)
142 #define UNCORE_HAS_FIFO BIT(3)
144 const struct intel_forcewake_range *fw_domains_table;
145 unsigned int fw_domains_table_entries;
148 * Shadowed registers are special cases where we can safely write
149 * to the register *without* grabbing forcewake.
151 const struct i915_range *shadowed_reg_table;
152 unsigned int shadowed_reg_table_entries;
154 struct notifier_block pmic_bus_access_nb;
155 const struct intel_uncore_fw_get *fw_get_funcs;
156 struct intel_uncore_funcs funcs;
158 unsigned int fifo_count;
160 enum forcewake_domains fw_domains;
161 enum forcewake_domains fw_domains_active;
162 enum forcewake_domains fw_domains_timer;
163 enum forcewake_domains fw_domains_saved; /* user domains saved for S3 */
165 struct intel_uncore_forcewake_domain {
166 struct intel_uncore *uncore;
167 enum forcewake_domain_id id;
168 enum forcewake_domains mask;
169 unsigned int wake_count;
171 struct hrtimer timer;
172 u32 __iomem *reg_set;
173 u32 __iomem *reg_ack;
174 } *fw_domain[FW_DOMAIN_ID_COUNT];
176 unsigned int user_forcewake_count;
178 struct intel_uncore_mmio_debug *debug;
181 /* Iterate over initialised fw domains */
182 #define for_each_fw_domain_masked(domain__, mask__, uncore__, tmp__) \
183 for (tmp__ = (mask__); tmp__ ;) \
184 for_each_if(domain__ = (uncore__)->fw_domain[__mask_next_bit(tmp__)])
186 #define for_each_fw_domain(domain__, uncore__, tmp__) \
187 for_each_fw_domain_masked(domain__, (uncore__)->fw_domains, uncore__, tmp__)
190 intel_uncore_has_forcewake(const struct intel_uncore *uncore)
192 return uncore->flags & UNCORE_HAS_FORCEWAKE;
196 intel_uncore_has_fpga_dbg_unclaimed(const struct intel_uncore *uncore)
198 return uncore->flags & UNCORE_HAS_FPGA_DBG_UNCLAIMED;
202 intel_uncore_has_dbg_unclaimed(const struct intel_uncore *uncore)
204 return uncore->flags & UNCORE_HAS_DBG_UNCLAIMED;
208 intel_uncore_has_fifo(const struct intel_uncore *uncore)
210 return uncore->flags & UNCORE_HAS_FIFO;
213 u32 intel_uncore_read_with_mcr_steering_fw(struct intel_uncore *uncore,
215 int slice, int subslice);
216 u32 intel_uncore_read_with_mcr_steering(struct intel_uncore *uncore,
217 i915_reg_t reg, int slice, int subslice);
218 void intel_uncore_write_with_mcr_steering(struct intel_uncore *uncore,
219 i915_reg_t reg, u32 value,
220 int slice, int subslice);
222 intel_uncore_mmio_debug_init_early(struct intel_uncore_mmio_debug *mmio_debug);
223 void intel_uncore_init_early(struct intel_uncore *uncore,
224 struct intel_gt *gt);
225 int intel_uncore_setup_mmio(struct intel_uncore *uncore, phys_addr_t phys_addr);
226 int intel_uncore_init_mmio(struct intel_uncore *uncore);
227 void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
228 struct intel_gt *gt);
229 bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore);
230 bool intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore);
231 void intel_uncore_cleanup_mmio(struct intel_uncore *uncore);
232 void intel_uncore_fini_mmio(struct intel_uncore *uncore);
233 void intel_uncore_suspend(struct intel_uncore *uncore);
234 void intel_uncore_resume_early(struct intel_uncore *uncore);
235 void intel_uncore_runtime_resume(struct intel_uncore *uncore);
237 void assert_forcewakes_inactive(struct intel_uncore *uncore);
238 void assert_forcewakes_active(struct intel_uncore *uncore,
239 enum forcewake_domains fw_domains);
240 const char *intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id);
242 enum forcewake_domains
243 intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
244 i915_reg_t reg, unsigned int op);
245 #define FW_REG_READ (1)
246 #define FW_REG_WRITE (2)
248 void intel_uncore_forcewake_get(struct intel_uncore *uncore,
249 enum forcewake_domains domains);
250 void intel_uncore_forcewake_put(struct intel_uncore *uncore,
251 enum forcewake_domains domains);
252 void intel_uncore_forcewake_put_delayed(struct intel_uncore *uncore,
253 enum forcewake_domains domains);
254 void intel_uncore_forcewake_flush(struct intel_uncore *uncore,
255 enum forcewake_domains fw_domains);
258 * Like above but the caller must manage the uncore.lock itself.
259 * Must be used with intel_uncore_read_fw() and friends.
261 void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
262 enum forcewake_domains domains);
263 void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
264 enum forcewake_domains domains);
266 void intel_uncore_forcewake_user_get(struct intel_uncore *uncore);
267 void intel_uncore_forcewake_user_put(struct intel_uncore *uncore);
269 int __intel_wait_for_register(struct intel_uncore *uncore,
273 unsigned int fast_timeout_us,
274 unsigned int slow_timeout_ms,
277 intel_wait_for_register(struct intel_uncore *uncore,
281 unsigned int timeout_ms)
283 return __intel_wait_for_register(uncore, reg, mask, value, 2,
287 int __intel_wait_for_register_fw(struct intel_uncore *uncore,
291 unsigned int fast_timeout_us,
292 unsigned int slow_timeout_ms,
295 intel_wait_for_register_fw(struct intel_uncore *uncore,
299 unsigned int timeout_ms)
301 return __intel_wait_for_register_fw(uncore, reg, mask, value,
302 2, timeout_ms, NULL);
305 /* register access functions */
306 #define __raw_read(x__, s__) \
307 static inline u##x__ __raw_uncore_read##x__(const struct intel_uncore *uncore, \
310 return read##s__(uncore->regs + i915_mmio_reg_offset(reg)); \
313 #define __raw_write(x__, s__) \
314 static inline void __raw_uncore_write##x__(const struct intel_uncore *uncore, \
315 i915_reg_t reg, u##x__ val) \
317 write##s__(val, uncore->regs + i915_mmio_reg_offset(reg)); \
332 #define __uncore_read(name__, x__, s__, trace__) \
333 static inline u##x__ intel_uncore_##name__(struct intel_uncore *uncore, \
336 return uncore->funcs.mmio_read##s__(uncore, reg, (trace__)); \
339 #define __uncore_write(name__, x__, s__, trace__) \
340 static inline void intel_uncore_##name__(struct intel_uncore *uncore, \
341 i915_reg_t reg, u##x__ val) \
343 uncore->funcs.mmio_write##s__(uncore, reg, val, (trace__)); \
346 __uncore_read(read8, 8, b, true)
347 __uncore_read(read16, 16, w, true)
348 __uncore_read(read, 32, l, true)
349 __uncore_read(read16_notrace, 16, w, false)
350 __uncore_read(read_notrace, 32, l, false)
352 __uncore_write(write8, 8, b, true)
353 __uncore_write(write16, 16, w, true)
354 __uncore_write(write, 32, l, true)
355 __uncore_write(write_notrace, 32, l, false)
357 /* Be very careful with read/write 64-bit values. On 32-bit machines, they
358 * will be implemented using 2 32-bit writes in an arbitrary order with
359 * an arbitrary delay between them. This can cause the hardware to
360 * act upon the intermediate value, possibly leading to corruption and
361 * machine death. For this reason we do not support intel_uncore_write64,
362 * or uncore->funcs.mmio_writeq.
364 * When reading a 64-bit value as two 32-bit values, the delay may cause
365 * the two reads to mismatch, e.g. a timestamp overflowing. Also note that
366 * occasionally a 64-bit register does not actually support a full readq
367 * and must be read using two 32-bit reads.
369 * You have been warned.
371 __uncore_read(read64, 64, q, true)
374 intel_uncore_read64_2x32(struct intel_uncore *uncore,
375 i915_reg_t lower_reg, i915_reg_t upper_reg)
377 u32 upper, lower, old_upper, loop = 0;
378 upper = intel_uncore_read(uncore, upper_reg);
381 lower = intel_uncore_read(uncore, lower_reg);
382 upper = intel_uncore_read(uncore, upper_reg);
383 } while (upper != old_upper && loop++ < 2);
384 return (u64)upper << 32 | lower;
387 #define intel_uncore_posting_read(...) ((void)intel_uncore_read_notrace(__VA_ARGS__))
388 #define intel_uncore_posting_read16(...) ((void)intel_uncore_read16_notrace(__VA_ARGS__))
391 #undef __uncore_write
393 /* These are untraced mmio-accessors that are only valid to be used inside
394 * critical sections, such as inside IRQ handlers, where forcewake is explicitly
397 * Think twice, and think again, before using these.
399 * As an example, these accessors can possibly be used between:
401 * spin_lock_irq(&uncore->lock);
402 * intel_uncore_forcewake_get__locked();
406 * intel_uncore_forcewake_put__locked();
407 * spin_unlock_irq(&uncore->lock);
410 * Note: some registers may not need forcewake held, so
411 * intel_uncore_forcewake_{get,put} can be omitted, see
412 * intel_uncore_forcewake_for_reg().
414 * Certain architectures will die if the same cacheline is concurrently accessed
415 * by different clients (e.g. on Ivybridge). Access to registers should
416 * therefore generally be serialised, by either the dev_priv->uncore.lock or
417 * a more localised lock guarding all access to that bank of registers.
419 #define intel_uncore_read_fw(...) __raw_uncore_read32(__VA_ARGS__)
420 #define intel_uncore_write_fw(...) __raw_uncore_write32(__VA_ARGS__)
421 #define intel_uncore_write64_fw(...) __raw_uncore_write64(__VA_ARGS__)
422 #define intel_uncore_posting_read_fw(...) ((void)intel_uncore_read_fw(__VA_ARGS__))
424 static inline void intel_uncore_rmw(struct intel_uncore *uncore,
425 i915_reg_t reg, u32 clear, u32 set)
429 old = intel_uncore_read(uncore, reg);
430 val = (old & ~clear) | set;
432 intel_uncore_write(uncore, reg, val);
435 static inline void intel_uncore_rmw_fw(struct intel_uncore *uncore,
436 i915_reg_t reg, u32 clear, u32 set)
440 old = intel_uncore_read_fw(uncore, reg);
441 val = (old & ~clear) | set;
443 intel_uncore_write_fw(uncore, reg, val);
446 static inline int intel_uncore_write_and_verify(struct intel_uncore *uncore,
447 i915_reg_t reg, u32 val,
448 u32 mask, u32 expected_val)
452 intel_uncore_write(uncore, reg, val);
453 reg_val = intel_uncore_read(uncore, reg);
455 return (reg_val & mask) != expected_val ? -EINVAL : 0;
458 #define raw_reg_read(base, reg) \
459 readl(base + i915_mmio_reg_offset(reg))
460 #define raw_reg_write(base, reg, value) \
461 writel(value, base + i915_mmio_reg_offset(reg))
463 #endif /* !__INTEL_UNCORE_H__ */