scsi/fnic/fnic_isr.c

16 #include "fnic.h"
20 	struct fnic *fnic = data;
24 	pba = vnic_intr_legacy_pba(fnic->legacy_pba);
28 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
29 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
32 		vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_NOTIFY]);
33 		fnic_handle_link_event(fnic);
37 		vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_ERR]);
38 		fnic_log_q_error(fnic);
42 		atomic64_inc(&fnic->fnic_stats.misc_stats.intx_dummy);
43 		vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_DUMMY]);
47 		work_done += fnic_wq_copy_cmpl_handler(fnic, io_completions, FNIC_MQ_CQ_INDEX);
48 		work_done += fnic_wq_cmpl_handler(fnic, -1);
49 		work_done += fnic_rq_cmpl_handler(fnic, -1);
51 		vnic_intr_return_credits(&fnic->intr[FNIC_INTX_WQ_RQ_COPYWQ],
62 	struct fnic *fnic = data;
65 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
66 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
68 	work_done += fnic_wq_copy_cmpl_handler(fnic, io_completions, FNIC_MQ_CQ_INDEX);
69 	work_done += fnic_wq_cmpl_handler(fnic, -1);
70 	work_done += fnic_rq_cmpl_handler(fnic, -1);
72 	vnic_intr_return_credits(&fnic->intr[0],
82 	struct fnic *fnic = data;
85 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
86 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
88 	rq_work_done = fnic_rq_cmpl_handler(fnic, -1);
89 	vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_RQ],
99 	struct fnic *fnic = data;
102 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
103 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
105 	wq_work_done = fnic_wq_cmpl_handler(fnic, -1);
106 	vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ],
115 	struct fnic *fnic = data;
119 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
120 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
122 	i = irq - fnic->msix[0].irq_num;
123 	if (i >= fnic->wq_copy_count + fnic->copy_wq_base ||
124 		i < 0 || fnic->msix[i].irq_num != irq) {
125 		for (i = fnic->copy_wq_base; i < fnic->wq_copy_count + fnic->copy_wq_base ; i++) {
126 			if (fnic->msix[i].irq_num == irq)
131 	wq_copy_work_done = fnic_wq_copy_cmpl_handler(fnic, io_completions, i);
132 	vnic_intr_return_credits(&fnic->intr[i],
141 	struct fnic *fnic = data;
143 	fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
144 	atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
146 	vnic_intr_return_all_credits(&fnic->intr[fnic->err_intr_offset]);
147 	fnic_log_q_error(fnic);
148 	fnic_handle_link_event(fnic);
153 void fnic_free_intr(struct fnic *fnic)
157 	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
160 		free_irq(pci_irq_vector(fnic->pdev, 0), fnic);
164 		for (i = 0; i < ARRAY_SIZE(fnic->msix); i++)
165 			if (fnic->msix[i].requested)
166 				free_irq(pci_irq_vector(fnic->pdev, i),
167 					 fnic->msix[i].devid);
175 int fnic_request_intr(struct fnic *fnic)
180 	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
183 		err = request_irq(pci_irq_vector(fnic->pdev, 0),
184 				&fnic_isr_legacy, IRQF_SHARED, DRV_NAME, fnic);
188 		err = request_irq(pci_irq_vector(fnic->pdev, 0), &fnic_isr_msi,
189 				  0, fnic->name, fnic);
194 		sprintf(fnic->msix[FNIC_MSIX_RQ].devname,
195 			"%.11s-fcs-rq", fnic->name);
196 		fnic->msix[FNIC_MSIX_RQ].isr = fnic_isr_msix_rq;
197 		fnic->msix[FNIC_MSIX_RQ].devid = fnic;
199 		sprintf(fnic->msix[FNIC_MSIX_WQ].devname,
200 			"%.11s-fcs-wq", fnic->name);
201 		fnic->msix[FNIC_MSIX_WQ].isr = fnic_isr_msix_wq;
202 		fnic->msix[FNIC_MSIX_WQ].devid = fnic;
204 		for (i = fnic->copy_wq_base; i < fnic->wq_copy_count + fnic->copy_wq_base; i++) {
205 			sprintf(fnic->msix[i].devname,
206 				"%.11s-scsi-wq-%d", fnic->name, i-FNIC_MSIX_WQ_COPY);
207 			fnic->msix[i].isr = fnic_isr_msix_wq_copy;
208 			fnic->msix[i].devid = fnic;
211 		sprintf(fnic->msix[fnic->err_intr_offset].devname,
212 			"%.11s-err-notify", fnic->name);
213 		fnic->msix[fnic->err_intr_offset].isr =
215 		fnic->msix[fnic->err_intr_offset].devid = fnic;
217 		for (i = 0; i < fnic->intr_count; i++) {
218 			fnic->msix[i].irq_num = pci_irq_vector(fnic->pdev, i);
220 			err = request_irq(fnic->msix[i].irq_num,
221 							fnic->msix[i].isr, 0,
222 							fnic->msix[i].devname,
223 							fnic->msix[i].devid);
225 				FNIC_ISR_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
228 				fnic_free_intr(fnic);
231 			fnic->msix[i].requested = 1;
242 int fnic_set_intr_mode_msix(struct fnic *fnic)
244 	unsigned int n = ARRAY_SIZE(fnic->rq);
245 	unsigned int m = ARRAY_SIZE(fnic->wq);
246 	unsigned int o = ARRAY_SIZE(fnic->hw_copy_wq);
253 	FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
256 	FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
258 		fnic->rq_count, fnic->raw_wq_count,
259 		fnic->wq_copy_count, fnic->cq_count);
261 	if (fnic->rq_count <= n && fnic->raw_wq_count <= m &&
262 		fnic->wq_copy_count <= o) {
264 		int vecs = fnic->rq_count + fnic->raw_wq_count + fnic->wq_copy_count + 1;
266 		vec_count = pci_alloc_irq_vectors(fnic->pdev, min_irqs, vecs,
268 		FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
274 				FNIC_ISR_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
278 					FNIC_ISR_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
284 			fnic->rq_count = n;
285 			fnic->raw_wq_count = m;
286 			fnic->copy_wq_base = fnic->rq_count + fnic->raw_wq_count;
287 			fnic->wq_copy_count = vec_count - n - m - 1;
288 			fnic->wq_count = fnic->raw_wq_count + fnic->wq_copy_count;
289 			if (fnic->cq_count != vec_count - 1) {
290 				FNIC_ISR_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
292 				fnic->cq_count, vec_count);
293 				fnic->cq_count = vec_count - 1;
295 			fnic->intr_count = vec_count;
296 			fnic->err_intr_offset = fnic->rq_count + fnic->wq_count;
298 			FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
300 				fnic->rq_count,
301 				fnic->raw_wq_count, fnic->copy_wq_base);
303 			FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
305 				fnic->wq_copy_count,
306 				fnic->wq_count, fnic->cq_count);
308 			FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
310 				fnic->intr_count,
311 				fnic->err_intr_offset);
313 			vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_MSIX);
314 			FNIC_ISR_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
315 					"fnic using MSI-X\n");
322 int fnic_set_intr_mode(struct fnic *fnic)
332 	ret_status = fnic_set_intr_mode_msix(fnic);
340 	if (fnic->rq_count >= 1 &&
341 	    fnic->raw_wq_count >= 1 &&
342 	    fnic->wq_copy_count >= 1 &&
343 	    fnic->cq_count >= 3 &&
344 	    fnic->intr_count >= 1 &&
345 	    pci_alloc_irq_vectors(fnic->pdev, 1, 1, PCI_IRQ_MSI) == 1) {
346 		fnic->rq_count = 1;
347 		fnic->raw_wq_count = 1;
348 		fnic->wq_copy_count = 1;
349 		fnic->wq_count = 2;
350 		fnic->cq_count = 3;
351 		fnic->intr_count = 1;
352 		fnic->err_intr_offset = 0;
354 		FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
356 		vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_MSI);
368 	if (fnic->rq_count >= 1 &&
369 	    fnic->raw_wq_count >= 1 &&
370 	    fnic->wq_copy_count >= 1 &&
371 	    fnic->cq_count >= 3 &&
372 	    fnic->intr_count >= 3) {
374 		fnic->rq_count = 1;
375 		fnic->raw_wq_count = 1;
376 		fnic->wq_copy_count = 1;
377 		fnic->cq_count = 3;
378 		fnic->intr_count = 3;
380 		FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
382 		vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
387 	vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
392 void fnic_clear_intr_mode(struct fnic *fnic)
394 	pci_free_irq_vectors(fnic->pdev);
395 	vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);