1 // SPDX-License-Identifier: MIT
10 #include <linux/error-injection.h>
29  * - PCODE hw metrics
30  * - PCODE for display operations
37 		[PCODE_ILLEGAL_CMD] = {-ENXIO, "Illegal Command"},  in pcode_mailbox_status()
38 		[PCODE_TIMEOUT] = {-ETIMEDOUT, "Timed out"},  in pcode_mailbox_status()
39 		[PCODE_ILLEGAL_DATA] = {-EINVAL, "Illegal Data"},  in pcode_mailbox_status()
40 		[PCODE_ILLEGAL_SUBCOMMAND] = {-ENXIO, "Illegal Subcommand"},  in pcode_mailbox_status()
41 		[PCODE_LOCKED] = {-EBUSY, "PCODE Locked"},  in pcode_mailbox_status()
42 		[PCODE_GT_RATIO_OUT_OF_RANGE] = {-EOVERFLOW,  in pcode_mailbox_status()
44 		[PCODE_REJECTED] = {-EACCES, "PCODE Rejected"},  in pcode_mailbox_status()
45 		[PCODE_ERROR_MASK] = {-EPROTO, "Unknown"},  in pcode_mailbox_status()
48 	err = xe_mmio_read32(&tile->mmio, PCODE_MAILBOX) & PCODE_ERROR_MASK;  in pcode_mailbox_status()
50 		drm_err(&tile_to_xe(tile)->drm, "PCODE Mailbox failed: %d %s", err,  in pcode_mailbox_status()
52 		return err_decode[err].errno ?: -EPROTO;  in pcode_mailbox_status()
62 	struct xe_mmio *mmio = &tile->mmio;  in __pcode_mailbox_rw()
65 	if (tile_to_xe(tile)->info.skip_pcode)  in __pcode_mailbox_rw()
69 		return -EAGAIN;  in __pcode_mailbox_rw()
93 	if (tile_to_xe(tile)->info.skip_pcode)  in pcode_mailbox_rw()
96 	lockdep_assert_held(&tile->pcode.lock);  in pcode_mailbox_rw()
101 int xe_pcode_write_timeout(struct xe_tile *tile, u32 mbox, u32 data, int timeout)  in xe_pcode_write_timeout()  argument
105 	mutex_lock(&tile->pcode.lock);  in xe_pcode_write_timeout()
106 	err = pcode_mailbox_rw(tile, mbox, &data, NULL, timeout, false, false);  in xe_pcode_write_timeout()
107 	mutex_unlock(&tile->pcode.lock);  in xe_pcode_write_timeout()
112 int xe_pcode_write64_timeout(struct xe_tile *tile, u32 mbox, u32 data0, u32 data1, int timeout)  in xe_pcode_write64_timeout()  argument
116 	mutex_lock(&tile->pcode.lock);  in xe_pcode_write64_timeout()
117 	err = pcode_mailbox_rw(tile, mbox, &data0, &data1, timeout, false, false);  in xe_pcode_write64_timeout()
118 	mutex_unlock(&tile->pcode.lock);  in xe_pcode_write64_timeout()
127 	mutex_lock(&tile->pcode.lock);  in xe_pcode_read()
129 	mutex_unlock(&tile->pcode.lock);  in xe_pcode_read()
159 	return -ETIMEDOUT;  in pcode_try_request()
163  * xe_pcode_request - send PCODE request until acknowledgment
169  * @timeout_base_ms: timeout for polling with preemption enabled
172  * reports an error or an overall timeout of @timeout_base_ms+50 ms expires.
175  * for @timeout_base_ms and if this times out for another 50 ms with
178  * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
189 	mutex_lock(&tile->pcode.lock);  in xe_pcode_request()
200 	 * the poll with preemption disabled to maximize the number of  in xe_pcode_request()
201 	 * requests. Increase the timeout from @timeout_base_ms to 50ms to  in xe_pcode_request()
206 	drm_err(&tile_to_xe(tile)->drm,  in xe_pcode_request()
207 		"PCODE timeout, retrying with preemption disabled\n");  in xe_pcode_request()
214 	mutex_unlock(&tile->pcode.lock);  in xe_pcode_request()
218  * xe_pcode_init_min_freq_table - Initialize PCODE's QOS frequency table
227  * 1-1 Ring vs GT frequency. Even though, without setting it, PCODE might
230  * It returns 0 on success, and -ERROR number on failure, -EINVAL if max
233  * - -ENXIO: "Illegal Command"
234  * - -ETIMEDOUT: "Timed out"
235  * - -EINVAL: "Illegal Data"
236  * - -ENXIO, "Illegal Subcommand"
237  * - -EBUSY: "PCODE Locked"
238  * - -EOVERFLOW, "GT ratio out of range"
239  * - -EACCES, "PCODE Rejected"
240  * - -EPROTO, "Unknown"
248 	if (!tile_to_xe(tile)->info.has_llc)  in xe_pcode_init_min_freq_table()
252 		return -EINVAL;  in xe_pcode_init_min_freq_table()
254 	mutex_lock(&tile->pcode.lock);  in xe_pcode_init_min_freq_table()
265 	mutex_unlock(&tile->pcode.lock);  in xe_pcode_init_min_freq_table()
270  * xe_pcode_ready - Ensure PCODE is initialized
280  * Returns 0 on success, and -error number on failure.
289 	if (xe->info.skip_pcode)  in xe_pcode_ready()
296 		mutex_lock(&tile->pcode.lock);  in xe_pcode_ready()
304 		mutex_unlock(&tile->pcode.lock);  in xe_pcode_ready()
307 		drm_err(&xe->drm,  in xe_pcode_ready()
322 	drmm_mutex_init(&tile_to_xe(tile)->drm, &tile->pcode.lock);  in xe_pcode_init()