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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/drivers/mailbox/bcm-pdc-mailbox.c
....@@ -1,17 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright 2016 Broadcom
3
- *
4
- * This program is free software; you can redistribute it and/or modify
5
- * it under the terms of the GNU General Public License, version 2, as
6
- * published by the Free Software Foundation (the "GPL").
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
10
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11
- * General Public License version 2 (GPLv2) for more details.
12
- *
13
- * You should have received a copy of the GNU General Public License
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- * version 2 (GPLv2) along with this source code.
154  */
165 
176 /*
....@@ -406,8 +395,6 @@
406395 	 */
407396 	struct scatterlist *src_sg[PDC_RING_ENTRIES];
408397 
409
-	struct dentry *debugfs_stats;  /* debug FS stats file for this PDC */
410
-
411398 	/* counters */
412399 	u32  pdc_requests;     /* number of request messages submitted */
413400 	u32  pdc_replies;      /* number of reply messages received */
....@@ -449,33 +436,33 @@
449436 
450437 	pdcs = filp->private_data;
451438 	out_offset = 0;
452
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
439
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
453440 			       "SPU %u stats:\n", pdcs->pdc_idx);
454
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
441
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
455442 			       "PDC requests....................%u\n",
456443 			       pdcs->pdc_requests);
457
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
444
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
458445 			       "PDC responses...................%u\n",
459446 			       pdcs->pdc_replies);
460
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
447
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
461448 			       "Tx not done.....................%u\n",
462449 			       pdcs->last_tx_not_done);
463
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
450
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
464451 			       "Tx ring full....................%u\n",
465452 			       pdcs->tx_ring_full);
466
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
453
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
467454 			       "Rx ring full....................%u\n",
468455 			       pdcs->rx_ring_full);
469
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
456
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
470457 			       "Tx desc write fail. Ring full...%u\n",
471458 			       pdcs->txnobuf);
472
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
459
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
473460 			       "Rx desc write fail. Ring full...%u\n",
474461 			       pdcs->rxnobuf);
475
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
462
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
476463 			       "Receive overflow................%u\n",
477464 			       pdcs->rx_oflow);
478
-	out_offset += snprintf(buf + out_offset, out_count - out_offset,
465
+	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
479466 			       "Num frags in rx ring............%u\n",
480467 			       NRXDACTIVE(pdcs->rxin, pdcs->last_rx_curr,
481468 					  pdcs->nrxpost));
....@@ -512,9 +499,8 @@
512499 		debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
513500 
514501 	/* S_IRUSR == 0400 */
515
-	pdcs->debugfs_stats = debugfs_create_file(spu_stats_name, 0400,
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-						  debugfs_dir, pdcs,
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-						  &pdc_debugfs_stats);
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+	debugfs_create_file(spu_stats_name, 0400, debugfs_dir, pdcs,
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+			    &pdc_debugfs_stats);
518504 }
519505 
520506 static void pdc_free_debugfs(void)
....@@ -693,7 +679,7 @@
693679 
694680 	/* read last_rx_curr from register once */
695681 	pdcs->last_rx_curr =
696
-	    (ioread32(&pdcs->rxregs_64->status0) &
682
+	    (ioread32((const void __iomem *)&pdcs->rxregs_64->status0) &
697683 	     CRYPTO_D64_RS0_CD_MASK) / RING_ENTRY_SIZE;
698684 
699685 	do {
....@@ -976,9 +962,9 @@
976962  * a DMA receive interrupt. Reenables the receive interrupt.
977963  * @data: PDC state structure
978964  */
979
-static void pdc_tasklet_cb(unsigned long data)
965
+static void pdc_tasklet_cb(struct tasklet_struct *t)
980966 {
981
-	struct pdc_state *pdcs = (struct pdc_state *)data;
967
+	struct pdc_state *pdcs = from_tasklet(pdcs, t, rx_tasklet);
982968 
983969 	pdc_receive(pdcs);
984970 
....@@ -1471,7 +1457,7 @@
14711457 		mbc->chans[chan_index].con_priv = pdcs;
14721458 
14731459 	/* Register mailbox controller */
1474
-	err = mbox_controller_register(mbc);
1460
+	err = devm_mbox_controller_register(dev, mbc);
14751461 	if (err) {
14761462 		dev_crit(dev,
14771463 			 "Failed to register PDC mailbox controller. Error %d.",
....@@ -1603,7 +1589,7 @@
16031589 	pdc_hw_init(pdcs);
16041590 
16051591 	/* Init tasklet for deferred DMA rx processing */
1606
-	tasklet_init(&pdcs->rx_tasklet, pdc_tasklet_cb, (unsigned long)pdcs);
1592
+	tasklet_setup(&pdcs->rx_tasklet, pdc_tasklet_cb);
16071593 
16081594 	err = pdc_interrupts_init(pdcs);
16091595 	if (err)
....@@ -1614,7 +1600,6 @@
16141600 	if (err)
16151601 		goto cleanup_buf_pool;
16161602 
1617
-	pdcs->debugfs_stats = NULL;
16181603 	pdc_setup_debugfs(pdcs);
16191604 
16201605 	dev_dbg(dev, "pdc_probe() successful");
....@@ -1640,8 +1625,6 @@
16401625 	tasklet_kill(&pdcs->rx_tasklet);
16411626 
16421627 	pdc_hw_disable(pdcs);
1643
-
1644
-	mbox_controller_unregister(&pdcs->mbc);
16451628 
16461629 	dma_pool_destroy(pdcs->rx_buf_pool);
16471630 	dma_pool_destroy(pdcs->ring_pool);