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linux_dsm_epyc7002/include/linux/pnp.h
Bjorn Helgaas 402b310cb6 PNP: remove null pointer checks 
Remove some null pointer checks.  Null pointers in these areas indicate
programming errors, and I think it's better to oops immediately rather than
return an error that is easily ignored.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:43:04 -07:00

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/*
* Linux Plug and Play Support
* Copyright by Adam Belay <ambx1@neo.rr.com>
*/
#ifndef _LINUX_PNP_H
#define _LINUX_PNP_H
#ifdef __KERNEL__
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/mod_devicetable.h>
#define PNP_MAX_PORT 8
#define PNP_MAX_MEM 4
#define PNP_MAX_IRQ 2
#define PNP_MAX_DMA 2
#define PNP_NAME_LEN 50
struct pnp_protocol;
struct pnp_dev;
/*
* Resource Management
*/
/* Use these instead of directly reading pnp_dev to get resource information */
#define pnp_port_start(dev,bar) ((dev)->res.port_resource[(bar)].start)
#define pnp_port_end(dev,bar) ((dev)->res.port_resource[(bar)].end)
#define pnp_port_flags(dev,bar) ((dev)->res.port_resource[(bar)].flags)
#define pnp_port_valid(dev,bar) \
((pnp_port_flags((dev),(bar)) & (IORESOURCE_IO | IORESOURCE_UNSET)) \
== IORESOURCE_IO)
#define pnp_port_len(dev,bar) \
((pnp_port_start((dev),(bar)) == 0 && \
pnp_port_end((dev),(bar)) == \
pnp_port_start((dev),(bar))) ? 0 : \
\
(pnp_port_end((dev),(bar)) - \
pnp_port_start((dev),(bar)) + 1))
#define pnp_mem_start(dev,bar) ((dev)->res.mem_resource[(bar)].start)
#define pnp_mem_end(dev,bar) ((dev)->res.mem_resource[(bar)].end)
#define pnp_mem_flags(dev,bar) ((dev)->res.mem_resource[(bar)].flags)
#define pnp_mem_valid(dev,bar) \
((pnp_mem_flags((dev),(bar)) & (IORESOURCE_MEM | IORESOURCE_UNSET)) \
== IORESOURCE_MEM)
#define pnp_mem_len(dev,bar) \
((pnp_mem_start((dev),(bar)) == 0 && \
pnp_mem_end((dev),(bar)) == \
pnp_mem_start((dev),(bar))) ? 0 : \
\
(pnp_mem_end((dev),(bar)) - \
pnp_mem_start((dev),(bar)) + 1))
#define pnp_irq(dev,bar) ((dev)->res.irq_resource[(bar)].start)
#define pnp_irq_flags(dev,bar) ((dev)->res.irq_resource[(bar)].flags)
#define pnp_irq_valid(dev,bar) \
((pnp_irq_flags((dev),(bar)) & (IORESOURCE_IRQ | IORESOURCE_UNSET)) \
== IORESOURCE_IRQ)
#define pnp_dma(dev,bar) ((dev)->res.dma_resource[(bar)].start)
#define pnp_dma_flags(dev,bar) ((dev)->res.dma_resource[(bar)].flags)
#define pnp_dma_valid(dev,bar) \
((pnp_dma_flags((dev),(bar)) & (IORESOURCE_DMA | IORESOURCE_UNSET)) \
== IORESOURCE_DMA)
#define PNP_PORT_FLAG_16BITADDR (1<<0)
#define PNP_PORT_FLAG_FIXED (1<<1)
struct pnp_port {
unsigned short min; /* min base number */
unsigned short max; /* max base number */
unsigned char align; /* align boundary */
unsigned char size; /* size of range */
unsigned char flags; /* port flags */
unsigned char pad; /* pad */
struct pnp_port *next; /* next port */
};
#define PNP_IRQ_NR 256
struct pnp_irq {
DECLARE_BITMAP(map, PNP_IRQ_NR); /* bitmask for IRQ lines */
unsigned char flags; /* IRQ flags */
unsigned char pad; /* pad */
struct pnp_irq *next; /* next IRQ */
};
struct pnp_dma {
unsigned char map; /* bitmask for DMA channels */
unsigned char flags; /* DMA flags */
struct pnp_dma *next; /* next port */
};
struct pnp_mem {
unsigned int min; /* min base number */
unsigned int max; /* max base number */
unsigned int align; /* align boundary */
unsigned int size; /* size of range */
unsigned char flags; /* memory flags */
unsigned char pad; /* pad */
struct pnp_mem *next; /* next memory resource */
};
#define PNP_RES_PRIORITY_PREFERRED 0
#define PNP_RES_PRIORITY_ACCEPTABLE 1
#define PNP_RES_PRIORITY_FUNCTIONAL 2
#define PNP_RES_PRIORITY_INVALID 65535
struct pnp_option {
unsigned short priority; /* priority */
struct pnp_port *port; /* first port */
struct pnp_irq *irq; /* first IRQ */
struct pnp_dma *dma; /* first DMA */
struct pnp_mem *mem; /* first memory resource */
struct pnp_option *next; /* used to chain dependent resources */
};
struct pnp_resource_table {
struct resource port_resource[PNP_MAX_PORT];
struct resource mem_resource[PNP_MAX_MEM];
struct resource dma_resource[PNP_MAX_DMA];
struct resource irq_resource[PNP_MAX_IRQ];
};
/*
* Device Managemnt
*/
struct pnp_card {
struct device dev; /* Driver Model device interface */
unsigned char number; /* used as an index, must be unique */
struct list_head global_list; /* node in global list of cards */
struct list_head protocol_list; /* node in protocol's list of cards */
struct list_head devices; /* devices attached to the card */
struct pnp_protocol *protocol;
struct pnp_id *id; /* contains supported EISA IDs */
char name[PNP_NAME_LEN]; /* contains a human-readable name */
unsigned char pnpver; /* Plug & Play version */
unsigned char productver; /* product version */
unsigned int serial; /* serial number */
unsigned char checksum; /* if zero - checksum passed */
struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */
};
#define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list)
#define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list)
#define to_pnp_card(n) container_of(n, struct pnp_card, dev)
#define pnp_for_each_card(card) \
for((card) = global_to_pnp_card(pnp_cards.next); \
(card) != global_to_pnp_card(&pnp_cards); \
(card) = global_to_pnp_card((card)->global_list.next))
struct pnp_card_link {
struct pnp_card *card;
struct pnp_card_driver *driver;
void *driver_data;
pm_message_t pm_state;
};
static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard)
{
return pcard->driver_data;
}
static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data)
{
pcard->driver_data = data;
}
struct pnp_dev {
struct device dev; /* Driver Model device interface */
u64 dma_mask;
unsigned char number; /* used as an index, must be unique */
int status;
struct list_head global_list; /* node in global list of devices */
struct list_head protocol_list; /* node in list of device's protocol */
struct list_head card_list; /* node in card's list of devices */
struct list_head rdev_list; /* node in cards list of requested devices */
struct pnp_protocol *protocol;
struct pnp_card *card; /* card the device is attached to, none if NULL */
struct pnp_driver *driver;
struct pnp_card_link *card_link;
struct pnp_id *id; /* supported EISA IDs */
int active;
int capabilities;
struct pnp_option *independent;
struct pnp_option *dependent;
struct pnp_resource_table res;
char name[PNP_NAME_LEN]; /* contains a human-readable name */
unsigned short regs; /* ISAPnP: supported registers */
int flags; /* used by protocols */
struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */
void *data;
};
#define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list)
#define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list)
#define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list)
#define to_pnp_dev(n) container_of(n, struct pnp_dev, dev)
#define pnp_for_each_dev(dev) \
for((dev) = global_to_pnp_dev(pnp_global.next); \
(dev) != global_to_pnp_dev(&pnp_global); \
(dev) = global_to_pnp_dev((dev)->global_list.next))
#define card_for_each_dev(card,dev) \
for((dev) = card_to_pnp_dev((card)->devices.next); \
(dev) != card_to_pnp_dev(&(card)->devices); \
(dev) = card_to_pnp_dev((dev)->card_list.next))
#define pnp_dev_name(dev) (dev)->name
static inline void *pnp_get_drvdata(struct pnp_dev *pdev)
{
return dev_get_drvdata(&pdev->dev);
}
static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data)
{
dev_set_drvdata(&pdev->dev, data);
}
struct pnp_fixup {
char id[7];
void (*quirk_function) (struct pnp_dev * dev); /* fixup function */
};
/* config parameters */
#define PNP_CONFIG_NORMAL 0x0001
#define PNP_CONFIG_FORCE 0x0002 /* disables validity checking */
/* capabilities */
#define PNP_READ 0x0001
#define PNP_WRITE 0x0002
#define PNP_DISABLE 0x0004
#define PNP_CONFIGURABLE 0x0008
#define PNP_REMOVABLE 0x0010
#define pnp_can_read(dev) (((dev)->protocol->get) && \
((dev)->capabilities & PNP_READ))
#define pnp_can_write(dev) (((dev)->protocol->set) && \
((dev)->capabilities & PNP_WRITE))
#define pnp_can_disable(dev) (((dev)->protocol->disable) && \
((dev)->capabilities & PNP_DISABLE))
#define pnp_can_configure(dev) ((!(dev)->active) && \
((dev)->capabilities & PNP_CONFIGURABLE))
#ifdef CONFIG_ISAPNP
extern struct pnp_protocol isapnp_protocol;
#define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol))
#else
#define pnp_device_is_isapnp(dev) 0
#endif
#ifdef CONFIG_PNPBIOS
extern struct pnp_protocol pnpbios_protocol;
#define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol))
#else
#define pnp_device_is_pnpbios(dev) 0
#endif
/* status */
#define PNP_READY 0x0000
#define PNP_ATTACHED 0x0001
#define PNP_BUSY 0x0002
#define PNP_FAULTY 0x0004
/* isapnp specific macros */
#define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1)
#define isapnp_csn_number(dev) ((dev)->number)
/*
* Driver Management
*/
struct pnp_id {
char id[PNP_ID_LEN];
struct pnp_id *next;
};
struct pnp_driver {
char *name;
const struct pnp_device_id *id_table;
unsigned int flags;
int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
void (*remove) (struct pnp_dev *dev);
int (*suspend) (struct pnp_dev *dev, pm_message_t state);
int (*resume) (struct pnp_dev *dev);
struct device_driver driver;
};
#define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
struct pnp_card_driver {
struct list_head global_list;
char *name;
const struct pnp_card_device_id *id_table;
unsigned int flags;
int (*probe) (struct pnp_card_link *card,
const struct pnp_card_device_id *card_id);
void (*remove) (struct pnp_card_link *card);
int (*suspend) (struct pnp_card_link *card, pm_message_t state);
int (*resume) (struct pnp_card_link *card);
struct pnp_driver link;
};
#define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
/* pnp driver flags */
#define PNP_DRIVER_RES_DO_NOT_CHANGE 0x0001 /* do not change the state of the device */
#define PNP_DRIVER_RES_DISABLE 0x0003 /* ensure the device is disabled */
/*
* Protocol Management
*/
struct pnp_protocol {
struct list_head protocol_list;
char *name;
/* resource control functions */
int (*get) (struct pnp_dev *dev, struct pnp_resource_table *res);
int (*set) (struct pnp_dev *dev, struct pnp_resource_table *res);
int (*disable) (struct pnp_dev *dev);
/* protocol specific suspend/resume */
int (*suspend) (struct pnp_dev * dev, pm_message_t state);
int (*resume) (struct pnp_dev * dev);
/* used by pnp layer only (look but don't touch) */
unsigned char number; /* protocol number */
struct device dev; /* link to driver model */
struct list_head cards;
struct list_head devices;
};
#define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
#define protocol_for_each_card(protocol,card) \
for((card) = protocol_to_pnp_card((protocol)->cards.next); \
(card) != protocol_to_pnp_card(&(protocol)->cards); \
(card) = protocol_to_pnp_card((card)->protocol_list.next))
#define protocol_for_each_dev(protocol,dev) \
for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
(dev) != protocol_to_pnp_dev(&(protocol)->devices); \
(dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
extern struct bus_type pnp_bus_type;
#if defined(CONFIG_PNP)
/* device management */
int pnp_register_protocol(struct pnp_protocol *protocol);
void pnp_unregister_protocol(struct pnp_protocol *protocol);
int pnp_add_device(struct pnp_dev *dev);
int pnp_device_attach(struct pnp_dev *pnp_dev);
void pnp_device_detach(struct pnp_dev *pnp_dev);
extern struct list_head pnp_global;
extern int pnp_platform_devices;
/* multidevice card support */
int pnp_add_card(struct pnp_card *card);
void pnp_remove_card(struct pnp_card *card);
int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
void pnp_remove_card_device(struct pnp_dev *dev);
int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card);
struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
const char *id, struct pnp_dev *from);
void pnp_release_card_device(struct pnp_dev *dev);
int pnp_register_card_driver(struct pnp_card_driver *drv);
void pnp_unregister_card_driver(struct pnp_card_driver *drv);
extern struct list_head pnp_cards;
/* resource management */
struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev);
struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
int priority);
int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data);
int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data);
int pnp_register_port_resource(struct pnp_option *option,
struct pnp_port *data);
int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data);
void pnp_init_resource_table(struct pnp_resource_table *table);
int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
int mode);
int pnp_auto_config_dev(struct pnp_dev *dev);
int pnp_validate_config(struct pnp_dev *dev);
int pnp_start_dev(struct pnp_dev *dev);
int pnp_stop_dev(struct pnp_dev *dev);
int pnp_activate_dev(struct pnp_dev *dev);
int pnp_disable_dev(struct pnp_dev *dev);
void pnp_resource_change(struct resource *resource, resource_size_t start,
resource_size_t size);
/* protocol helpers */
int pnp_is_active(struct pnp_dev *dev);
int compare_pnp_id(struct pnp_id *pos, const char *id);
int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev);
int pnp_register_driver(struct pnp_driver *drv);
void pnp_unregister_driver(struct pnp_driver *drv);
#else
/* device management */
static inline int pnp_register_protocol(struct pnp_protocol *protocol) { return -ENODEV; }
static inline void pnp_unregister_protocol(struct pnp_protocol *protocol) { }
static inline int pnp_init_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_add_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
#define pnp_platform_devices 0
/* multidevice card support */
static inline int pnp_add_card(struct pnp_card *card) { return -ENODEV; }
static inline void pnp_remove_card(struct pnp_card *card) { }
static inline int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) { return -ENODEV; }
static inline void pnp_remove_card_device(struct pnp_dev *dev) { }
static inline int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card) { return -ENODEV; }
static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
static inline void pnp_release_card_device(struct pnp_dev *dev) { }
static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
/* resource management */
static inline struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev) { return NULL; }
static inline struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev, int priority) { return NULL; }
static inline int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data) { return -ENODEV; }
static inline int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data) { return -ENODEV; }
static inline int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data) { return -ENODEV; }
static inline int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data) { return -ENODEV; }
static inline void pnp_init_resource_table(struct pnp_resource_table *table) { }
static inline int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, int mode) { return -ENODEV; }
static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_validate_config(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline void pnp_resource_change(struct resource *resource, resource_size_t start, resource_size_t size) { }
/* protocol helpers */
static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
static inline int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
#endif /* CONFIG_PNP */
#define pnp_err(format, arg...) printk(KERN_ERR "pnp: " format "\n" , ## arg)
#define pnp_info(format, arg...) printk(KERN_INFO "pnp: " format "\n" , ## arg)
#define pnp_warn(format, arg...) printk(KERN_WARNING "pnp: " format "\n" , ## arg)
#ifdef CONFIG_PNP_DEBUG
#define pnp_dbg(format, arg...) printk(KERN_DEBUG "pnp: " format "\n" , ## arg)
#else
#define pnp_dbg(format, arg...) do {} while (0)
#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_PNP_H */
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