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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/block/skd_main.c
....@@ -1,12 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Driver for sTec s1120 PCIe SSDs. sTec was acquired in 2013 by HGST and HGST
34  * was acquired by Western Digital in 2012.
45  *
56  * Copyright 2012 sTec, Inc.
67  * Copyright (c) 2017 Western Digital Corporation or its affiliates.
7
- *
8
- * This file is part of the Linux kernel, and is made available under
9
- * the terms of the GNU General Public License version 2.
108  */
119 
1210 #include <linux/kernel.h>
....@@ -27,7 +25,6 @@
2725 #include <linux/dma-mapping.h>
2826 #include <linux/completion.h>
2927 #include <linux/scatterlist.h>
30
-#include <linux/version.h>
3128 #include <linux/err.h>
3229 #include <linux/aer.h>
3330 #include <linux/wait.h>
....@@ -181,6 +178,7 @@
181178 	struct fit_completion_entry_v1 completion;
182179 
183180 	struct fit_comp_error_info err_info;
181
+	int retries;
184182 
185183 	blk_status_t status;
186184 };
....@@ -382,11 +380,12 @@
382380  * READ/WRITE REQUESTS
383381  *****************************************************************************
384382  */
385
-static void skd_inc_in_flight(struct request *rq, void *data, bool reserved)
383
+static bool skd_inc_in_flight(struct request *rq, void *data, bool reserved)
386384 {
387385 	int *count = data;
388386 
389387 	count++;
388
+	return true;
390389 }
391390 
392391 static int skd_in_flight(struct skd_device *skdev)
....@@ -493,6 +492,11 @@
493492 
494493 	if (unlikely(skdev->state != SKD_DRVR_STATE_ONLINE))
495494 		return skd_fail_all(q) ? BLK_STS_IOERR : BLK_STS_RESOURCE;
495
+
496
+	if (!(req->rq_flags & RQF_DONTPREP)) {
497
+		skreq->retries = 0;
498
+		req->rq_flags |= RQF_DONTPREP;
499
+	}
496500 
497501 	blk_mq_start_request(req);
498502 
....@@ -632,7 +636,7 @@
632636 	 * Map scatterlist to PCI bus addresses.
633637 	 * Note PCI might change the number of entries.
634638 	 */
635
-	n_sg = pci_map_sg(skdev->pdev, sgl, n_sg, skreq->data_dir);
639
+	n_sg = dma_map_sg(&skdev->pdev->dev, sgl, n_sg, skreq->data_dir);
636640 	if (n_sg <= 0)
637641 		return false;
638642 
....@@ -682,7 +686,8 @@
682686 	skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr =
683687 		skreq->sksg_dma_address +
684688 		((skreq->n_sg) * sizeof(struct fit_sg_descriptor));
685
-	pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, skreq->data_dir);
689
+	dma_unmap_sg(&skdev->pdev->dev, &skreq->sg[0], skreq->n_sg,
690
+		     skreq->data_dir);
686691 }
687692 
688693 /*
....@@ -1411,7 +1416,8 @@
14111416 	case SKD_CHECK_STATUS_REPORT_GOOD:
14121417 	case SKD_CHECK_STATUS_REPORT_SMART_ALERT:
14131418 		skreq->status = BLK_STS_OK;
1414
-		blk_mq_complete_request(req);
1419
+		if (likely(!blk_should_fake_timeout(req->q)))
1420
+			blk_mq_complete_request(req);
14151421 		break;
14161422 
14171423 	case SKD_CHECK_STATUS_BUSY_IMMINENT:
....@@ -1424,17 +1430,18 @@
14241430 		break;
14251431 
14261432 	case SKD_CHECK_STATUS_REQUEUE_REQUEST:
1427
-		if ((unsigned long) ++req->special < SKD_MAX_RETRIES) {
1433
+		if (++skreq->retries < SKD_MAX_RETRIES) {
14281434 			skd_log_skreq(skdev, skreq, "retry");
14291435 			blk_mq_requeue_request(req, true);
14301436 			break;
14311437 		}
1432
-		/* fall through */
1438
+		fallthrough;
14331439 
14341440 	case SKD_CHECK_STATUS_REPORT_ERROR:
14351441 	default:
14361442 		skreq->status = BLK_STS_IOERR;
1437
-		blk_mq_complete_request(req);
1443
+		if (likely(!blk_should_fake_timeout(req->q)))
1444
+			blk_mq_complete_request(req);
14381445 		break;
14391446 	}
14401447 }
....@@ -1554,7 +1561,8 @@
15541561 		 */
15551562 		if (likely(cmp_status == SAM_STAT_GOOD)) {
15561563 			skreq->status = BLK_STS_OK;
1557
-			blk_mq_complete_request(rq);
1564
+			if (likely(!blk_should_fake_timeout(rq->q)))
1565
+				blk_mq_complete_request(rq);
15581566 		} else {
15591567 			skd_resolve_req_exception(skdev, skreq, rq);
15601568 		}
....@@ -1886,13 +1894,13 @@
18861894 		skd_skdev_state_to_str(skdev->state), skdev->state);
18871895 }
18881896 
1889
-static void skd_recover_request(struct request *req, void *data, bool reserved)
1897
+static bool skd_recover_request(struct request *req, void *data, bool reserved)
18901898 {
18911899 	struct skd_device *const skdev = data;
18921900 	struct skd_request_context *skreq = blk_mq_rq_to_pdu(req);
18931901 
18941902 	if (skreq->state != SKD_REQ_STATE_BUSY)
1895
-		return;
1903
+		return true;
18961904 
18971905 	skd_log_skreq(skdev, skreq, "recover");
18981906 
....@@ -1903,6 +1911,7 @@
19031911 	skreq->state = SKD_REQ_STATE_IDLE;
19041912 	skreq->status = BLK_STS_IOERR;
19051913 	blk_mq_complete_request(req);
1914
+	return true;
19061915 }
19071916 
19081917 static void skd_recover_requests(struct skd_device *skdev)
....@@ -2632,8 +2641,8 @@
26322641 		"comp pci_alloc, total bytes %zd entries %d\n",
26332642 		SKD_SKCOMP_SIZE, SKD_N_COMPLETION_ENTRY);
26342643 
2635
-	skcomp = pci_zalloc_consistent(skdev->pdev, SKD_SKCOMP_SIZE,
2636
-				       &skdev->cq_dma_address);
2644
+	skcomp = dma_alloc_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE,
2645
+				    &skdev->cq_dma_address, GFP_KERNEL);
26372646 
26382647 	if (skcomp == NULL) {
26392648 		rc = -ENOMEM;
....@@ -2674,10 +2683,10 @@
26742683 
26752684 		skmsg->id = i + SKD_ID_FIT_MSG;
26762685 
2677
-		skmsg->msg_buf = pci_alloc_consistent(skdev->pdev,
2678
-						      SKD_N_FITMSG_BYTES,
2679
-						      &skmsg->mb_dma_address);
2680
-
2686
+		skmsg->msg_buf = dma_alloc_coherent(&skdev->pdev->dev,
2687
+						    SKD_N_FITMSG_BYTES,
2688
+						    &skmsg->mb_dma_address,
2689
+						    GFP_KERNEL);
26812690 		if (skmsg->msg_buf == NULL) {
26822691 			rc = -ENOMEM;
26832692 			goto err_out;
....@@ -2687,7 +2696,6 @@
26872696 		     (FIT_QCMD_ALIGN - 1),
26882697 		     "not aligned: msg_buf %p mb_dma_address %pad\n",
26892698 		     skmsg->msg_buf, &skmsg->mb_dma_address);
2690
-		memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES);
26912699 	}
26922700 
26932701 err_out:
....@@ -2834,7 +2842,6 @@
28342842 		skdev->sgs_per_request * sizeof(struct scatterlist);
28352843 	skdev->tag_set.numa_node = NUMA_NO_NODE;
28362844 	skdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE |
2837
-		BLK_MQ_F_SG_MERGE |
28382845 		BLK_ALLOC_POLICY_TO_MQ_FLAG(BLK_TAG_ALLOC_FIFO);
28392846 	skdev->tag_set.driver_data = skdev;
28402847 	rc = blk_mq_alloc_tag_set(&skdev->tag_set);
....@@ -2971,8 +2978,8 @@
29712978 static void skd_free_skcomp(struct skd_device *skdev)
29722979 {
29732980 	if (skdev->skcomp_table)
2974
-		pci_free_consistent(skdev->pdev, SKD_SKCOMP_SIZE,
2975
-				    skdev->skcomp_table, skdev->cq_dma_address);
2981
+		dma_free_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE,
2982
+				  skdev->skcomp_table, skdev->cq_dma_address);
29762983 
29772984 	skdev->skcomp_table = NULL;
29782985 	skdev->cq_dma_address = 0;
....@@ -2991,8 +2998,8 @@
29912998 		skmsg = &skdev->skmsg_table[i];
29922999 
29933000 		if (skmsg->msg_buf != NULL) {
2994
-			pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES,
2995
-					    skmsg->msg_buf,
3001
+			dma_free_coherent(&skdev->pdev->dev, SKD_N_FITMSG_BYTES,
3002
+					  skmsg->msg_buf,
29963003 					    skmsg->mb_dma_address);
29973004 		}
29983005 		skmsg->msg_buf = NULL;
....@@ -3104,7 +3111,7 @@
31043111 static int skd_bdev_attach(struct device *parent, struct skd_device *skdev)
31053112 {
31063113 	dev_dbg(&skdev->pdev->dev, "add_disk\n");
3107
-	device_add_disk(parent, skdev->disk);
3114
+	device_add_disk(parent, skdev->disk, NULL);
31083115 	return 0;
31093116 }
31103117 
....@@ -3172,18 +3179,12 @@
31723179 	rc = pci_request_regions(pdev, DRV_NAME);
31733180 	if (rc)
31743181 		goto err_out;
3175
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3176
-	if (!rc) {
3177
-		if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
3178
-			dev_err(&pdev->dev, "consistent DMA mask error %d\n",
3179
-				rc);
3180
-		}
3181
-	} else {
3182
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3183
-		if (rc) {
3184
-			dev_err(&pdev->dev, "DMA mask error %d\n", rc);
3185
-			goto err_out_regions;
3186
-		}
3182
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3183
+	if (rc)
3184
+		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3185
+	if (rc) {
3186
+		dev_err(&pdev->dev, "DMA mask error %d\n", rc);
3187
+		goto err_out_regions;
31873188 	}
31883189 
31893190 	if (!skd_major) {
....@@ -3367,20 +3368,12 @@
33673368 	rc = pci_request_regions(pdev, DRV_NAME);
33683369 	if (rc)
33693370 		goto err_out;
3370
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3371
-	if (!rc) {
3372
-		if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
3373
-
3374
-			dev_err(&pdev->dev, "consistent DMA mask error %d\n",
3375
-				rc);
3376
-		}
3377
-	} else {
3378
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3379
-		if (rc) {
3380
-
3381
-			dev_err(&pdev->dev, "DMA mask error %d\n", rc);
3382
-			goto err_out_regions;
3383
-		}
3371
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3372
+	if (rc)
3373
+		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3374
+	if (rc) {
3375
+		dev_err(&pdev->dev, "DMA mask error %d\n", rc);
3376
+		goto err_out_regions;
33843377 	}
33853378 
33863379 	pci_set_master(pdev);