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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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45289bf6ac
An already existing wait queue replaces raw1394's complete_sem which was maintained in parallel to the wait queue. The role of the semaphore's counter is taken over by a direct check of what was really counted: The presence of items in the list of completed requests. Notes: - raw1394_release() sleeps uninterruptibly until all requests were completed. This is the same behaviour as before the patch. - The macros wait_event and wait_event_interruptible are called with a condition argument which has a side effect, i.e. manipulation of the requests list. This side effect happens only if the condition is true. The patch relies on the fact that wait_event[_interruptible] does not evaluate the condition again after it became true. - The diffstat looks unfavorable with respect to added lines of code. However 19 of them are comments, and some are due to separation of existing code blocks into two small helper functions. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Ben Collins <bcollins@ubuntu.com>
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
#ifndef IEEE1394_RAW1394_PRIVATE_H
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#define IEEE1394_RAW1394_PRIVATE_H
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/* header for definitions that are private to the raw1394 driver
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and not visible to user-space */
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#define RAW1394_DEVICE_MAJOR 171
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#define RAW1394_DEVICE_NAME "raw1394"
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#define RAW1394_MAX_USER_CSR_DIRS 16
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struct iso_block_store {
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atomic_t refcount;
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size_t data_size;
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quadlet_t data[0];
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};
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enum raw1394_iso_state { RAW1394_ISO_INACTIVE = 0,
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RAW1394_ISO_RECV = 1,
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RAW1394_ISO_XMIT = 2 };
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struct file_info {
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struct list_head list;
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enum { opened, initialized, connected } state;
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unsigned int protocol_version;
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struct hpsb_host *host;
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struct list_head req_pending;
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struct list_head req_complete;
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spinlock_t reqlists_lock;
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wait_queue_head_t wait_complete;
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struct list_head addr_list;
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u8 __user *fcp_buffer;
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/* old ISO API */
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u64 listen_channels;
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quadlet_t __user *iso_buffer;
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size_t iso_buffer_length;
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u8 notification; /* (busreset-notification) RAW1394_NOTIFY_OFF/ON */
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/* new rawiso API */
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enum raw1394_iso_state iso_state;
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struct hpsb_iso *iso_handle;
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/* User space's CSR1212 dynamic ConfigROM directories */
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struct csr1212_keyval *csr1212_dirs[RAW1394_MAX_USER_CSR_DIRS];
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/* Legacy ConfigROM update flag */
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u8 cfgrom_upd;
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};
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struct arm_addr {
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struct list_head addr_list; /* file_info list */
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u64 start, end;
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u64 arm_tag;
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u8 access_rights;
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u8 notification_options;
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u8 client_transactions;
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u64 recvb;
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u16 rec_length;
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u8 *addr_space_buffer; /* accessed by read/write/lock */
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};
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struct pending_request {
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struct list_head list;
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struct file_info *file_info;
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struct hpsb_packet *packet;
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struct iso_block_store *ibs;
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quadlet_t *data;
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int free_data;
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struct raw1394_request req;
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};
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struct host_info {
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struct list_head list;
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struct hpsb_host *host;
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struct list_head file_info_list;
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};
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#endif /* IEEE1394_RAW1394_PRIVATE_H */
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