hwtracing/coresight/coresight-tmc-etr.c

41  * @nr_pages		- Number of pages in the ring buffer.
42  * @pages		- Array of Pages in the ring buffer.
50 	void			**pages;
107  * @sg_table:		Generic SG Table holding the data/table pages.
118  * @nr_pages system pages.
120  * We need to map @nr_pages * ETR_SG_PAGES_PER_SYSPAGE data pages.
142  * tmc_pages_get_offset:  Go through all the pages in the tmc_pages
162  * tmc_pages_free : Unmap and free the pages used by tmc_pages.
163  * If the pages were not allocated in tmc_pages_alloc(), we would
176 		if (tmc_pages->pages && tmc_pages->pages[i])
177 			__free_page(tmc_pages->pages[i]);
180 	kfree(tmc_pages->pages);
182 	tmc_pages->pages = NULL;
188  * tmc_pages_alloc : Allocate and map pages for a given @tmc_pages.
189  * If @pages is not NULL, the list of page virtual addresses are
190  * used as the data pages. The pages are then dma_map'ed for @dev
197 			   enum dma_data_direction dir, void **pages)
209 	tmc_pages->pages = kcalloc(nr_pages, sizeof(*tmc_pages->pages),
211 	if (!tmc_pages->pages) {
218 		if (pages && pages[i]) {
219 			page = virt_to_page(pages[i]);
232 		tmc_pages->pages[i] = page;
268  * Alloc pages for the table. Since this will be used by the device,
269  * allocate the pages closer to the device (i.e, dev_to_node(dev)
282 	sg_table->table_vaddr = vmap(table_pages->pages,
293 static int tmc_alloc_data_pages(struct tmc_sg_table *sg_table, void **pages)
297 	/* Allocate data pages on the node requested by the caller */
300 			     DMA_FROM_DEVICE, pages);
302 		sg_table->data_vaddr = vmap(sg_table->data_pages.pages,
313  * tmc_alloc_sg_table: Allocate and setup dma pages for the TMC SG table
315  * Table pages.
319  * @nr_tpages	- Number of pages for the table entries.
320  * @nr_dpages	- Number of pages for Data buffer.
321  * @pages	- Optional list of virtual address of pages.
327 					void **pages)
340 	rc  = tmc_alloc_data_pages(sg_table, pages);
412 		*bufpp = page_address(data_pages->pages[pg_idx]) + pg_offset;
487  * pages allocated. Each Data page has ETR_SG_PAGES_PER_SYSPAGE SG pages.
565  * @pages	- Optional list of page virtual address
569 		      unsigned long size, void **pages)
582 	sg_table = tmc_alloc_sg_table(dev, node, nr_tpages, nr_dpages, pages);
592 	/* Sync the table pages for the HW */
604 				  void **pages)
609 	/* We cannot reuse existing pages for flat buf */
610 	if (pages)
703 				void **pages)
709 					  etr_buf->size, pages);
820 					 void **pages)
830 						      node, pages);
861  * @pages	: An optional list of pages.
865 					 int node, void **pages)
882 					    etr_buf, node, pages);
885 	 * If we have to use an existing list of pages, we cannot reliably
896 	if (rc && !pages && etr_can_use_flat_mode(&buf_hw, size))
898 					    etr_buf, node, pages);
901 					    etr_buf, node, pages);
904 					    etr_buf, node, pages);
1282 	      int nr_pages, void **pages, bool snapshot)
1321 			  void **pages, bool snapshot)
1357 	etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
1385 			    void **pages, bool snapshot)
1391 	return alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);
1396 		 int nr_pages, void **pages, bool snapshot)
1400 						   pages, snapshot);
1403 					 pages, snapshot);
1408 		       int nr_pages, void **pages, bool snapshot)
1420 	etr_buf = get_perf_etr_buf(drvdata, event, nr_pages, pages, snapshot);
1440 				  struct perf_event *event, void **pages,
1447 					  nr_pages, pages, snapshot);
1456 	etr_perf->pages = pages;
1511 	dst_pages = (char **)etr_perf->pages;