37  * init_window_state() - Initialise a new window to a known state
38  * @window:	The window to initialise
39  * @size:	The size of the window
41 static void init_window_state(struct window_context *window, uint32_t size)  in init_window_state()  argument
43 	window->mem = NULL;  in init_window_state()
44 	window->flash_offset = FLASH_OFFSET_UNINIT;  in init_window_state()
45 	window->size = size;  in init_window_state()
46 	window->dirty_bmap = NULL;  in init_window_state()
47 	window->age = 0;  in init_window_state()
64 	 * order, so the first window will be first in memory and so on. We  in init_window_mem()
69 		uint32_t size = context->windows.window[i].size;  in init_window_mem()
70 		MSG_DBG("Window %d @ %p for size 0x%.8x\n", i,  in init_window_mem()
72 		context->windows.window[i].mem = mem_location;  in init_window_mem()
75 			/* Tried to allocate window past the end of memory */  in init_window_mem()
86  * init_windows() - Initalise the window cache
95 	/* Check if window size and number set - otherwise set to default */  in init_windows()
100 	MSG_INFO("Window size: 0x%.8x\n", context->windows.default_size);  in init_windows()
108 	context->windows.window = calloc(context->windows.num,  in init_windows()
109 					 sizeof(*context->windows.window));  in init_windows()
110 	if (!context->windows.window) {  in init_windows()
116 		init_window_state(&context->windows.window[i],  in init_windows()
124  * free_windows() - Free the window cache
131 	/* Check window cache has actually been allocated */  in free_windows()
132 	if (context->windows.window) {  in free_windows()
134 			free(context->windows.window[i].dirty_bmap);  in free_windows()
136 		free(context->windows.window);  in free_windows()
140 /* Write from Window Functions */
145  * @offset_bytes:	The offset in the current window to write from (bytes)
164 	/* Find where in phys flash this is based on the window.flash_offset */  in write_from_window_v1()
185 	 * memory as part of the existing window  in write_from_window_v1()
188 		/* Before the start of our current window */  in write_from_window_v1()
202 		/* After the end of our current window */  in write_from_window_v1()
230 		/* Exceed window at the start */  in write_from_window_v1()
244 	 * either in the current window or the high_mem window.  in write_from_window_v1()
247 		/* Exceed window at the end */  in write_from_window_v1()
254 		/* Write from the current window - it's atleast that big */  in write_from_window_v1()
270  * write_from_window() - Write back to the flash from the current window
272  * @offset_bytes:	The offset in the current window to write from (blocks)
324 		MSG_ERR("Write from window with invalid type: %d\n", type);  in write_from_window()
331 /* Window Management Functions */
334  * alloc_window_dirty_bytemap() - (re)allocate all the window dirty bytemaps
343 		cur = &context->windows.window[i];  in alloc_window_dirty_bytemap()
354  * set_window_bytemap() - Set the window bytemap
356  * @cur:	The window to set the bytemap of
357  * @offset:	Where in the window to set the bytemap (blocks)
367 		MSG_ERR("Tried to set window bytemap past end of window\n");  in set_window_bytemap()
368 		MSG_ERR("Requested offset: 0x%x size: 0x%x window size: 0x%x\n",  in set_window_bytemap()
380  * close_current_window() - Close the current (active) window
385  * This closes the current window. If the host has requested the current window
387  * (set_bmc_event == false), otherwise if the current window has been closed
394 	MSG_DBG("Close current window, flags: 0x%.2x\n", flags);  in close_current_window()
409  * reset_window() - Reset a window context to a well defined default state
411  * @window:	The window to reset
413 void reset_window(struct mbox_context *context, struct window_context *window)  in reset_window()  argument
415 	window->flash_offset = FLASH_OFFSET_UNINIT;  in reset_window()
416 	window->size = context->windows.default_size;  in reset_window()
417 	if (window->dirty_bmap) { /* Might not have been allocated */  in reset_window()
418 		set_window_bytemap(context, window, 0,  in reset_window()
419 				   window->size >> context->block_size_shift,  in reset_window()
422 	window->age = 0;  in reset_window()
435 	/* We might have an open window which needs closing */  in reset_all_windows()
440 		reset_window(context, &context->windows.window[i]);  in reset_all_windows()
447  * find_oldest_window() - Find the oldest (Least Recently Used) window
450  * Return:	Pointer to the least recently used window
459 		cur = &context->windows.window[i];  in find_oldest_window()
471  * find_largest_window() - Find the largest window in the window cache
474  * Return:	The largest window
483 		cur = &context->windows.window[i];  in find_largest_window()
495  * search_windows() - Search the window cache for a window containing offset
498  * @exact:	If the window must exactly map the requested offset
503  * thus assume it can access window->size from the offset we give it.
505  * Return:	Pointer to a window containing the requested offset otherwise
514 	MSG_DBG("Searching for window which contains 0x%.8x %s\n",  in search_windows()
517 		cur = &context->windows.window[i];  in search_windows()
519 			/* Uninitialised Window */  in search_windows()
530 			/* This window contains the requested offset */  in search_windows()
540  * create_map_window() - Create a window mapping which maps the requested offset
542  * @this_window:	A pointer to update to the "new" window
544  * @exact:		If the window must exactly map the requested offset
546  * This is used to create a window mapping for the requested offset when there
547  * is no existing window in the cache which satisfies the offset. This involves
548  * choosing an existing window from the window cache to evict so we can use it
550  * caller to that window since it now maps their request.
561 	MSG_DBG("Creating window which maps 0x%.8x %s\n", offset,  in create_map_window()
564 	/* Search for an uninitialised window, use this before evicting */  in create_map_window()
567 	/* No uninitialised window found, we need to choose one to "evict" */  in create_map_window()
569 		MSG_DBG("No uninitialised window, evicting one\n");  in create_map_window()
575  * In case of the virtual pnor, as of now it's possible that a window may  in create_map_window()
577  * per window, and some partitions are smaller than the max size. An offset  in create_map_window()
584 		 * It would be nice to align the offsets which we map to window  in create_map_window()
596 		MSG_ERR("Tried to open read window past flash limit\n");  in create_map_window()
601 		 * mask offset with window size, meaning when we have  in create_map_window()
602 		 * window size == flash size we will never allow the host to  in create_map_window()
603 		 * open a window except at 0x0, which isn't always where the  in create_map_window()
605 		 * hope the host doesn't access past the end of the window  in create_map_window()
621 	/* Copy from flash into the window buffer */  in create_map_window()
624 		/* We don't know how much we've copied -> better reset window */  in create_map_window()
640 	 * window size it's possible that something already maps this offset.  in create_map_window()
643 	 * of the window since all windows are the same size so another window  in create_map_window()
644 	 * cannot map just the middle of this window.  in create_map_window()
649 		MSG_DBG("Checking for window overlap\n");  in create_map_window()
662 	/* Clear the bytemap of the window just loaded -> we know it's clean */  in create_map_window()
667 	/* Update so we know what's in the window */  in create_map_window()