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TOMOYO Linux Cross Reference
Linux/sound/core/misc.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  *  Misc and compatibility things
  4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  5  */
  6 
  7 #include <linux/init.h>
  8 #include <linux/export.h>
  9 #include <linux/moduleparam.h>
 10 #include <linux/time.h>
 11 #include <linux/slab.h>
 12 #include <linux/ioport.h>
 13 #include <sound/core.h>
 14 
 15 #ifdef CONFIG_SND_DEBUG
 16 
 17 #ifdef CONFIG_SND_DEBUG_VERBOSE
 18 #define DEFAULT_DEBUG_LEVEL     2
 19 #else
 20 #define DEFAULT_DEBUG_LEVEL     1
 21 #endif
 22 
 23 static int debug = DEFAULT_DEBUG_LEVEL;
 24 module_param(debug, int, 0644);
 25 MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
 26 
 27 #endif /* CONFIG_SND_DEBUG */
 28 
 29 void release_and_free_resource(struct resource *res)
 30 {
 31         if (res) {
 32                 release_resource(res);
 33                 kfree(res);
 34         }
 35 }
 36 EXPORT_SYMBOL(release_and_free_resource);
 37 
 38 #ifdef CONFIG_SND_VERBOSE_PRINTK
 39 /* strip the leading path if the given path is absolute */
 40 static const char *sanity_file_name(const char *path)
 41 {
 42         if (*path == '/')
 43                 return strrchr(path, '/') + 1;
 44         else
 45                 return path;
 46 }
 47 #endif
 48 
 49 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
 50 void __snd_printk(unsigned int level, const char *path, int line,
 51                   const char *format, ...)
 52 {
 53         va_list args;
 54 #ifdef CONFIG_SND_VERBOSE_PRINTK
 55         int kern_level;
 56         struct va_format vaf;
 57         char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
 58         bool level_found = false;
 59 #endif
 60 
 61 #ifdef CONFIG_SND_DEBUG
 62         if (debug < level)
 63                 return;
 64 #endif
 65 
 66         va_start(args, format);
 67 #ifdef CONFIG_SND_VERBOSE_PRINTK
 68         vaf.fmt = format;
 69         vaf.va = &args;
 70 
 71         while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
 72                 const char *end_of_header = printk_skip_level(vaf.fmt);
 73 
 74                 /* Ignore KERN_CONT. We print filename:line for each piece. */
 75                 if (kern_level >= '' && kern_level <= '7') {
 76                         memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
 77                         level_found = true;
 78                 }
 79 
 80                 vaf.fmt = end_of_header;
 81         }
 82 
 83         if (!level_found && level)
 84                 memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
 85 
 86         printk(verbose_fmt, sanity_file_name(path), line, &vaf);
 87 #else
 88         vprintk(format, args);
 89 #endif
 90         va_end(args);
 91 }
 92 EXPORT_SYMBOL_GPL(__snd_printk);
 93 #endif
 94 
 95 #ifdef CONFIG_PCI
 96 #include <linux/pci.h>
 97 /**
 98  * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
 99  * @vendor: PCI SSV id
100  * @device: PCI SSD id
101  * @list: quirk list, terminated by a null entry
102  *
103  * Look through the given quirk list and finds a matching entry
104  * with the same PCI SSID.  When subdevice is 0, all subdevice
105  * values may match.
106  *
107  * Returns the matched entry pointer, or NULL if nothing matched.
108  */
109 const struct snd_pci_quirk *
110 snd_pci_quirk_lookup_id(u16 vendor, u16 device,
111                         const struct snd_pci_quirk *list)
112 {
113         const struct snd_pci_quirk *q;
114 
115         for (q = list; q->subvendor; q++) {
116                 if (q->subvendor != vendor)
117                         continue;
118                 if (!q->subdevice ||
119                     (device & q->subdevice_mask) == q->subdevice)
120                         return q;
121         }
122         return NULL;
123 }
124 EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
125 
126 /**
127  * snd_pci_quirk_lookup - look up a PCI SSID quirk list
128  * @pci: pci_dev handle
129  * @list: quirk list, terminated by a null entry
130  *
131  * Look through the given quirk list and finds a matching entry
132  * with the same PCI SSID.  When subdevice is 0, all subdevice
133  * values may match.
134  *
135  * Returns the matched entry pointer, or NULL if nothing matched.
136  */
137 const struct snd_pci_quirk *
138 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
139 {
140         if (!pci)
141                 return NULL;
142         return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
143                                        pci->subsystem_device,
144                                        list);
145 }
146 EXPORT_SYMBOL(snd_pci_quirk_lookup);
147 #endif
148 

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