6 #include <linux/msi.h>
19  * ntb_msi_init() - Initialize the MSI context
23  * It initializes the context for MSI operations and maps
46 	struct_size = sizeof(*ntb->msi) + sizeof(*ntb->msi->peer_mws) * peers;  in ntb_msi_init()
48 	ntb->msi = devm_kzalloc(&ntb->dev, struct_size, GFP_KERNEL);  in ntb_msi_init()
49 	if (!ntb->msi)  in ntb_msi_init()
52 	ntb->msi->desc_changed = desc_changed;  in ntb_msi_init()
62 		ntb->msi->peer_mws[i] = devm_ioremap(&ntb->dev, mw_phys_addr,  in ntb_msi_init()
64 		if (!ntb->msi->peer_mws[i]) {  in ntb_msi_init()
74 		if (ntb->msi->peer_mws[i])  in ntb_msi_init()
75 			devm_iounmap(&ntb->dev, ntb->msi->peer_mws[i]);  in ntb_msi_init()
77 	devm_kfree(&ntb->dev, ntb->msi);  in ntb_msi_init()
78 	ntb->msi = NULL;  in ntb_msi_init()
84  * ntb_msi_setup_mws() - Initialize the MSI inbound memory windows
108 	if (!ntb->msi)  in ntb_msi_setup_mws()
150 	ntb->msi->base_addr = addr;  in ntb_msi_setup_mws()
151 	ntb->msi->end_addr = addr + mw_min_size;  in ntb_msi_setup_mws()
203 	if (addr < ntb->msi->base_addr || addr >= ntb->msi->end_addr) {  in ntb_msi_set_desc()
205 			      "IRQ %d: MSI Address not within the memory window (%llx, [%llx %llx])\n",  in ntb_msi_set_desc()
206 			      entry->irq, addr, ntb->msi->base_addr,  in ntb_msi_set_desc()
207 			      ntb->msi->end_addr);  in ntb_msi_set_desc()
211 	msi_desc->addr_offset = addr - ntb->msi->base_addr;  in ntb_msi_set_desc()
223 	if (dr->ntb->msi->desc_changed)  in ntb_msi_write_msg()
224 		dr->ntb->msi->desc_changed(dr->ntb->ctx);  in ntb_msi_write_msg()
258  * ntbm_msi_request_threaded_irq() - allocate an MSI interrupt
267  * MSI interrupt and returns the descriptor used to trigger
288 	if (!ntb->msi)  in ntbm_msi_request_threaded_irq()
355  * @desc:	MSI descriptor data which triggers the interrupt
368 	if (!ntb->msi)  in ntb_msi_peer_trigger()
371 	idx = desc->addr_offset / sizeof(*ntb->msi->peer_mws[peer]);  in ntb_msi_peer_trigger()
373 	iowrite32(desc->data, &ntb->msi->peer_mws[peer][idx]);  in ntb_msi_peer_trigger()
380  * ntb_msi_peer_addr() - Get the DMA address to trigger a peer's MSI interrupt
383  * @desc:	MSI descriptor data which triggers the interrupt