1 // SPDX-License-Identifier: MIT
3  * Copyright © 2013-2021 Intel Corporation
10 static int gen6_check_mailbox_status(u32 mbox)  in gen6_check_mailbox_status()  argument
12 	switch (mbox & GEN6_PCODE_ERROR_MASK) {  in gen6_check_mailbox_status()
16 		return -ENODEV;  in gen6_check_mailbox_status()
18 		return -ENXIO;  in gen6_check_mailbox_status()
21 		return -EOVERFLOW;  in gen6_check_mailbox_status()
23 		return -ETIMEDOUT;  in gen6_check_mailbox_status()
25 		MISSING_CASE(mbox & GEN6_PCODE_ERROR_MASK);  in gen6_check_mailbox_status()
30 static int gen7_check_mailbox_status(u32 mbox)  in gen7_check_mailbox_status()  argument
32 	switch (mbox & GEN6_PCODE_ERROR_MASK) {  in gen7_check_mailbox_status()
36 		return -ENXIO;  in gen7_check_mailbox_status()
38 		return -ETIMEDOUT;  in gen7_check_mailbox_status()
40 		return -EINVAL;  in gen7_check_mailbox_status()
42 		return -ENXIO;  in gen7_check_mailbox_status()
44 		return -EBUSY;  in gen7_check_mailbox_status()
46 		return -EACCES;  in gen7_check_mailbox_status()
48 		return -EOVERFLOW;  in gen7_check_mailbox_status()
50 		MISSING_CASE(mbox & GEN6_PCODE_ERROR_MASK);  in gen7_check_mailbox_status()
55 static int __snb_pcode_rw(struct intel_uncore *uncore, u32 mbox,  in __snb_pcode_rw()  argument
60 	lockdep_assert_held(&uncore->i915->sb_lock);  in __snb_pcode_rw()
69 		return -EAGAIN;  in __snb_pcode_rw()
74 			      GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);  in __snb_pcode_rw()
81 					 &mbox))  in __snb_pcode_rw()
82 		return -ETIMEDOUT;  in __snb_pcode_rw()
89 	if (GRAPHICS_VER(uncore->i915) > 6)  in __snb_pcode_rw()
90 		return gen7_check_mailbox_status(mbox);  in __snb_pcode_rw()
92 		return gen6_check_mailbox_status(mbox);  in __snb_pcode_rw()
95 int snb_pcode_read(struct intel_uncore *uncore, u32 mbox, u32 *val, u32 *val1)  in snb_pcode_read()  argument
99 	mutex_lock(&uncore->i915->sb_lock);  in snb_pcode_read()
100 	err = __snb_pcode_rw(uncore, mbox, val, val1, 500, 20, true);  in snb_pcode_read()
101 	mutex_unlock(&uncore->i915->sb_lock);  in snb_pcode_read()
104 		drm_dbg(&uncore->i915->drm,  in snb_pcode_read()
105 			"warning: pcode (read from mbox %x) mailbox access failed for %ps: %d\n",  in snb_pcode_read()
106 			mbox, __builtin_return_address(0), err);  in snb_pcode_read()
112 int snb_pcode_write_timeout(struct intel_uncore *uncore, u32 mbox, u32 val,  in snb_pcode_write_timeout()  argument
117 	mutex_lock(&uncore->i915->sb_lock);  in snb_pcode_write_timeout()
118 	err = __snb_pcode_rw(uncore, mbox, &val, NULL,  in snb_pcode_write_timeout()
120 	mutex_unlock(&uncore->i915->sb_lock);  in snb_pcode_write_timeout()
123 		drm_dbg(&uncore->i915->drm,  in snb_pcode_write_timeout()
124 			"warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps: %d\n",  in snb_pcode_write_timeout()
125 			val, mbox, __builtin_return_address(0), err);  in snb_pcode_write_timeout()
131 static bool skl_pcode_try_request(struct intel_uncore *uncore, u32 mbox,  in skl_pcode_try_request()  argument
135 	*status = __snb_pcode_rw(uncore, mbox, &request, NULL, 500, 0, true);  in skl_pcode_try_request()
141  * skl_pcode_request - send PCODE request until acknowledgment
143  * @mbox: PCODE mailbox ID the request is targeted for
149  * Keep resending the @request to @mbox until PCODE acknowledges it, PCODE
156  * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
159 int skl_pcode_request(struct intel_uncore *uncore, u32 mbox, u32 request,  in skl_pcode_request()  argument
165 	mutex_lock(&uncore->i915->sb_lock);  in skl_pcode_request()
168 	skl_pcode_try_request(uncore, mbox, request, reply_mask, reply, &status)  in skl_pcode_request()
194 	drm_dbg_kms(&uncore->i915->drm,  in skl_pcode_request()
196 	drm_WARN_ON_ONCE(&uncore->i915->drm, timeout_base_ms > 3);  in skl_pcode_request()
202 	mutex_unlock(&uncore->i915->sb_lock);  in skl_pcode_request()
214 		return -EPROBE_DEFER;  in pcode_init_wait()
227 	if (!IS_DGFX(uncore->i915))  in intel_pcode_init()
237 		drm_notice(&uncore->i915->drm,  in intel_pcode_init()
248 	u32 mbox;  in snb_pcode_read_p()  local
251 	mbox = REG_FIELD_PREP(GEN6_PCODE_MB_COMMAND, mbcmd)  in snb_pcode_read_p()
255 	with_intel_runtime_pm(uncore->rpm, wakeref)  in snb_pcode_read_p()
256 		err = snb_pcode_read(uncore, mbox, val, NULL);  in snb_pcode_read_p()
264 	u32 mbox;  in snb_pcode_write_p()  local
267 	mbox = REG_FIELD_PREP(GEN6_PCODE_MB_COMMAND, mbcmd)  in snb_pcode_write_p()
271 	with_intel_runtime_pm(uncore->rpm, wakeref)  in snb_pcode_write_p()
272 		err = snb_pcode_write(uncore, mbox, val);  in snb_pcode_write_p()