Lines Matching refs:ntb
81 #include <linux/ntb.h>
93 MODULE_PARM_DESC(unsafe, "Run even though ntb operations may be unsafe");
100 struct ntb_dev *ntb;
121 link = ntb_link_is_up(pp->ntb, NULL, NULL);
131 out_db = BIT_ULL(ntb_peer_port_number(pp->ntb, pidx));
145 ntb_db_set_mask(pp->ntb, pp->in_db);
151 dev_dbg(&pp->ntb->dev, "Got no peers, so cancel\n");
155 dev_dbg(&pp->ntb->dev, "Ping-pong started with port %d, db %#llx\n",
156 ntb_peer_port_number(pp->ntb, pp->out_pidx), pp->out_db);
165 ntb_db_set_mask(pp->ntb, pp->in_db);
167 dev_dbg(&pp->ntb->dev, "Ping-pong cancelled\n");
177 ntb_peer_spad_write(pp->ntb, pp->out_pidx, 0, count);
178 ntb_peer_msg_write(pp->ntb, pp->out_pidx, 0, count);
180 dev_dbg(&pp->ntb->dev, "Ping port %d spad %#x, msg %#x\n",
181 ntb_peer_port_number(pp->ntb, pp->out_pidx), count, count);
183 ntb_peer_db_set(pp->ntb, pp->out_db);
184 ntb_db_clear_mask(pp->ntb, pp->in_db);
194 spad_data = ntb_spad_read(pp->ntb, 0);
195 msg_data = ntb_msg_read(pp->ntb, &pidx, 0);
196 ntb_msg_clear_sts(pp->ntb, -1);
203 dev_dbg(&pp->ntb->dev, "Pong spad %#x, msg %#x (port %d)\n",
204 spad_data, msg_data, ntb_peer_port_number(pp->ntb, pidx));
208 ntb_db_set_mask(pp->ntb, pp->in_db);
209 ntb_db_clear(pp->ntb, pp->in_db);
242 static int pp_check_ntb(struct ntb_dev *ntb)
246 if (ntb_db_is_unsafe(ntb)) {
247 dev_dbg(&ntb->dev, "Doorbell is unsafe\n");
252 if (ntb_spad_is_unsafe(ntb)) {
253 dev_dbg(&ntb->dev, "Scratchpad is unsafe\n");
258 pmask = GENMASK_ULL(ntb_peer_port_count(ntb), 0);
259 if ((ntb_db_valid_mask(ntb) & pmask) != pmask) {
260 dev_err(&ntb->dev, "Unsupported DB configuration\n");
264 if (ntb_spad_count(ntb) < 1 && ntb_msg_count(ntb) < 1) {
265 dev_err(&ntb->dev, "Scratchpads and messages unsupported\n");
267 } else if (ntb_spad_count(ntb) < 1) {
268 dev_dbg(&ntb->dev, "Scratchpads unsupported\n");
269 } else if (ntb_msg_count(ntb) < 1) {
270 dev_dbg(&ntb->dev, "Messages unsupported\n");
276 static struct pp_ctx *pp_create_data(struct ntb_dev *ntb)
280 pp = devm_kzalloc(&ntb->dev, sizeof(*pp), GFP_KERNEL);
284 pp->ntb = ntb;
297 lport = ntb_port_number(pp->ntb);
298 pcnt = ntb_peer_port_count(pp->ntb);
300 if (lport < ntb_peer_port_number(pp->ntb, pidx))
308 dev_dbg(&pp->ntb->dev, "Inbound db %#llx, prev %#llx, next %#llx\n",
317 db_mask = ntb_db_valid_mask(pp->ntb);
318 ret = ntb_db_set_mask(pp->ntb, db_mask);
323 if (ntb_msg_count(pp->ntb) < 1)
326 msg_mask = ntb_msg_outbits(pp->ntb) | ntb_msg_inbits(pp->ntb);
327 return ntb_msg_set_mask(pp->ntb, msg_mask);
334 ret = ntb_set_ctx(pp->ntb, pp, &pp_ops);
338 ntb_link_enable(pp->ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
340 ntb_link_event(pp->ntb);
347 ntb_link_disable(pp->ntb);
349 ntb_clear_ctx(pp->ntb);
354 struct pci_dev *pdev = pp->ntb->pdev;
366 static int pp_probe(struct ntb_client *client, struct ntb_dev *ntb)
371 ret = pp_check_ntb(ntb);
375 pp = pp_create_data(ntb);
394 static void pp_remove(struct ntb_client *client, struct ntb_dev *ntb)
396 struct pp_ctx *pp = ntb->ctx;