3  * DMA memory management for framework level HCD code (hc_driver)
21 #include <linux/usb/hcd.h>
53  * @hcd: the bus whose buffer pools are to be initialized
64 int hcd_buffer_create(struct usb_hcd *hcd)  in hcd_buffer_create()  argument
69 	if (hcd->localmem_pool || !hcd_uses_dma(hcd))  in hcd_buffer_create()
77 		hcd->pool[i] = dma_pool_create(name, hcd->self.sysdev,  in hcd_buffer_create()
79 		if (!hcd->pool[i]) {  in hcd_buffer_create()
80 			hcd_buffer_destroy(hcd);  in hcd_buffer_create()
90  * @hcd: the bus whose buffer pools are to be destroyed
95 void hcd_buffer_destroy(struct usb_hcd *hcd)  in hcd_buffer_destroy()  argument
103 		dma_pool_destroy(hcd->pool[i]);  in hcd_buffer_destroy()
104 		hcd->pool[i] = NULL;  in hcd_buffer_destroy()
120 	struct usb_hcd		*hcd = bus_to_hcd(bus);  in hcd_buffer_alloc()  local
126 	if (hcd->localmem_pool)  in hcd_buffer_alloc()
127 		return gen_pool_dma_alloc(hcd->localmem_pool, size, dma);  in hcd_buffer_alloc()
130 	if (!hcd_uses_dma(hcd)) {  in hcd_buffer_alloc()
137 			return dma_pool_alloc(hcd->pool[i], mem_flags, dma);  in hcd_buffer_alloc()
139 	return dma_alloc_coherent(hcd->self.sysdev, size, dma, mem_flags);  in hcd_buffer_alloc()
149 	struct usb_hcd		*hcd = bus_to_hcd(bus);  in hcd_buffer_free()  local
155 	if (hcd->localmem_pool) {  in hcd_buffer_free()
156 		gen_pool_free(hcd->localmem_pool, (unsigned long)addr, size);  in hcd_buffer_free()
160 	if (!hcd_uses_dma(hcd)) {  in hcd_buffer_free()
167 			dma_pool_free(hcd->pool[i], addr, dma);  in hcd_buffer_free()
171 	dma_free_coherent(hcd->self.sysdev, size, addr, dma);  in hcd_buffer_free()