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hc
2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/drivers/misc/genwqe/card_dev.c
....@@ -1,4 +1,5 @@
1
-/**
1
+// SPDX-License-Identifier: GPL-2.0-only
2
+/*
23  * IBM Accelerator Family 'GenWQE'
34  *
45  * (C) Copyright IBM Corp. 2013
....@@ -7,15 +8,6 @@
78  * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
89  * Author: Michael Jung <mijung@gmx.net>
910  * Author: Michael Ruettger <michael@ibmra.de>
10
- *
11
- * This program is free software; you can redistribute it and/or modify
12
- * it under the terms of the GNU General Public License (version 2 only)
13
- * as published by the Free Software Foundation.
14
- *
15
- * This program is distributed in the hope that it will be useful,
16
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
17
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18
- * GNU General Public License for more details.
1911  */
2012 
2113 /*
....@@ -95,7 +87,7 @@
9587  * @cfile:	Descriptor of opened file
9688  * @u_addr:	User virtual address
9789  * @size:	Size of buffer
98
- * @dma_addr:	DMA address to be updated
90
+ * @virt_addr:	Virtual address to be updated
9991  *
10092  * Return: Pointer to the corresponding mapping	NULL if not found
10193  */
....@@ -152,6 +144,7 @@
152144  * @u_addr:	user virtual address
153145  * @size:	size of buffer
154146  * @dma_addr:	DMA address to be updated
147
+ * @virt_addr:	Virtual address to be updated
155148  * Return: Pointer to the corresponding mapping	NULL if not found
156149  */
157150 static struct dma_mapping *__genwqe_search_mapping(struct genwqe_file *cfile,
....@@ -257,6 +250,8 @@
257250 
258251 /**
259252  * genwqe_kill_fasync() - Send signal to all processes with open GenWQE files
253
+ * @cd: GenWQE device information
254
+ * @sig: Signal to send out
260255  *
261256  * E.g. genwqe_send_signal(cd, SIGIO);
262257  */
....@@ -388,6 +383,7 @@
388383 
389384 /**
390385  * genwqe_vma_close() - Called each time when vma is unmapped
386
+ * @vma: VMA area to close
391387  *
392388  * Free memory which got allocated by GenWQE mmap().
393389  */
....@@ -424,6 +420,8 @@
424420 
425421 /**
426422  * genwqe_mmap() - Provide contignous buffers to userspace
423
+ * @filp:	File pointer (unused)
424
+ * @vma:	VMA area to map
427425  *
428426  * We use mmap() to allocate contignous buffers used for DMA
429427  * transfers. After the buffer is allocated we remap it to user-space
....@@ -492,16 +490,15 @@
492490 	return rc;
493491 }
494492 
493
+#define	FLASH_BLOCK	0x40000	/* we use 256k blocks */
494
+
495495 /**
496496  * do_flash_update() - Excute flash update (write image or CVPD)
497
- * @cd:        genwqe device
497
+ * @cfile:	Descriptor of opened file
498498  * @load:      details about image load
499499  *
500500  * Return: 0 if successful
501501  */
502
-
503
-#define	FLASH_BLOCK	0x40000	/* we use 256k blocks */
504
-
505502 static int do_flash_update(struct genwqe_file *cfile,
506503 			   struct genwqe_bitstream *load)
507504 {
....@@ -828,6 +825,8 @@
828825 
829826 /**
830827  * ddcb_cmd_cleanup() - Remove dynamically created fixup entries
828
+ * @cfile:	Descriptor of opened file
829
+ * @req:	DDCB work request
831830  *
832831  * Only if there are any. Pinnings are not removed.
833832  */
....@@ -852,6 +851,8 @@
852851 
853852 /**
854853  * ddcb_cmd_fixups() - Establish DMA fixups/sglists for user memory references
854
+ * @cfile:	Descriptor of opened file
855
+ * @req:	DDCB work request
855856  *
856857  * Before the DDCB gets executed we need to handle the fixups. We
857858  * replace the user-space addresses with DMA addresses or do
....@@ -982,6 +983,8 @@
982983 
983984 /**
984985  * genwqe_execute_ddcb() - Execute DDCB using userspace address fixups
986
+ * @cfile:	Descriptor of opened file
987
+ * @cmd:        Command identifier (passed from user)
985988  *
986989  * The code will build up the translation tables or lookup the
987990  * contignous memory allocation table to find the right translations
....@@ -1223,34 +1226,13 @@
12231226 	return rc;
12241227 }
12251228 
1226
-#if defined(CONFIG_COMPAT)
1227
-/**
1228
- * genwqe_compat_ioctl() - Compatibility ioctl
1229
- *
1230
- * Called whenever a 32-bit process running under a 64-bit kernel
1231
- * performs an ioctl on /dev/genwqe<n>_card.
1232
- *
1233
- * @filp:        file pointer.
1234
- * @cmd:         command.
1235
- * @arg:         user argument.
1236
- * Return:       zero on success or negative number on failure.
1237
- */
1238
-static long genwqe_compat_ioctl(struct file *filp, unsigned int cmd,
1239
-				unsigned long arg)
1240
-{
1241
-	return genwqe_ioctl(filp, cmd, arg);
1242
-}
1243
-#endif /* defined(CONFIG_COMPAT) */
1244
-
12451229 static const struct file_operations genwqe_fops = {
12461230 	.owner		= THIS_MODULE,
12471231 	.open		= genwqe_open,
12481232 	.fasync		= genwqe_fasync,
12491233 	.mmap		= genwqe_mmap,
12501234 	.unlocked_ioctl	= genwqe_ioctl,
1251
-#if defined(CONFIG_COMPAT)
1252
-	.compat_ioctl   = genwqe_compat_ioctl,
1253
-#endif
1235
+	.compat_ioctl   = compat_ptr_ioctl,
12541236 	.release	= genwqe_release,
12551237 };
12561238 
....@@ -1309,14 +1291,10 @@
13091291 		goto err_cdev;
13101292 	}
13111293 
1312
-	rc = genwqe_init_debugfs(cd);
1313
-	if (rc != 0)
1314
-		goto err_debugfs;
1294
+	genwqe_init_debugfs(cd);
13151295 
13161296 	return 0;
13171297 
1318
- err_debugfs:
1319
-	device_destroy(cd->class_genwqe, cd->devnum_genwqe);
13201298  err_cdev:
13211299 	cdev_del(&cd->cdev_genwqe);
13221300  err_add:
....@@ -1372,6 +1350,7 @@
13721350 
13731351 /**
13741352  * genwqe_device_remove() - Remove genwqe's char device
1353
+ * @cd: GenWQE device information
13751354  *
13761355  * This function must be called after the client devices are removed
13771356  * because it will free the major/minor number range for the genwqe