Linux Kernel Architecture
Chapter 6: Device Drivers Like most kernel data types, requests are equipped with pointers to private data. In this case, not on ...
Chapter 6: Device Drivers __REQ_ORDERED_COLOR, /* is before or after barrier */ __REQ_RW_SYNC, /* request is sync (O_DIRECT) */ ...
Chapter 6: Device Drivers struct block_device *bi_bdev; ... unsigned short bi_vcnt; /* how many bio_vec’s */ unsigned short bi_i ...
Chapter 6: Device Drivers 6.5.7 Submitting Requests In this section, I discuss the mechanism that the kernel provides to submit ...
Chapter 6: Device Drivers access is to be made to sectormwithin the partition, a request must be created to access sector m+nof ...
Chapter 6: Device Drivers *(current->bio_tail) = bio; bio->bi_next = NULL; current->bio_tail = &bio->bi_next; re ...
Chapter 6: Device Drivers Thedoloop is now executed a second time. Before the second — iterative! — call to__genericmake request ...
Chapter 6: Device Drivers ❑ ELEVATOR_BACK_MERGEandELEVATOR_FRONT_MERGEcause the new request to be coalesced with the request at ...
Chapter 6: Device Drivers drivers/block/ll_rw_blk.c void blk_plug_device(request_queue_t *q) { ... if (!test_and_set_bit(QUEUE_F ...
Chapter 6: Device Drivers sample_requestis a hardware-independent sample routine forrequest_fnthat illustrates the basic steps p ...
Chapter 6: Device Drivers <elevator.h> struct elevator_ops { elevator_merge_fn *elevator_merge_fn; elevator_merged_fn *ele ...
Chapter 6: Device Drivers Each elevator is encapsulated in the following data structure that holds further management informatio ...
Chapter 6: Device Drivers slices are allocated for each of the queues, and a round robin algorithm is used to process the queue. ...
Chapter 6: Device Drivers ❑ If the file is a regular file,file_ioctlis invoked. The function first checks a number of stan- dard ...
Chapter 6: Device Drivers Of particular interest are the three pointers to otherresourcestructures. These enable a tree-like hie ...
Chapter 6: Device Drivers ranges from 100 to 149 and from 150 to 199 are assigned. The originally large resource area is repeate ...
Chapter 6: Device Drivers 6.6.2 I/O Memory One of the most important aspects of the resource concept deals with how I/O memory i ...
Chapter 6: Device Drivers parent sibling parentchild parent sibling child parent 71: *(*(struc...->parent name = 0xc11e7300 " ...
Chapter 6: Device Drivers 0170-0177 : ide1 ... 0378-037a : parport0 03c0-03df : vga+ ... 0cf8-0cff : PCI conf1 1800-180f : Intel ...
Chapter 6: Device Drivers Table 6-4: Functions for Accessing I/O Ports. Function Meaning insb(port, addr, num) insl(port, addr, ...
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