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2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29 
 kernel/drivers/block/rsxx/dma.c
....@@ -1,25 +1,11 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23 * Filename: dma.c
3
-*
44 *
55 * Authors: Joshua Morris <josh.h.morris@us.ibm.com>
66 *	Philip Kelleher <pjk1939@linux.vnet.ibm.com>
77 *
88 * (C) Copyright 2013 IBM Corporation
9
-*
10
-* This program is free software; you can redistribute it and/or
11
-* modify it under the terms of the GNU General Public License as
12
-* published by the Free Software Foundation; either version 2 of the
13
-* License, or (at your option) any later version.
14
-*
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-* This program is distributed in the hope that it will be useful, but
16
-* WITHOUT ANY WARRANTY; without even the implied warranty of
17
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
-* General Public License for more details.
19
-*
20
-* You should have received a copy of the GNU General Public License
21
-* along with this program; if not, write to the Free Software Foundation,
22
-* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
239 */
2410 
2511 #include <linux/slab.h>
....@@ -94,7 +80,7 @@
9480 struct dma_tracker_list {
9581 	spinlock_t		lock;
9682 	int			head;
97
-	struct dma_tracker	list[0];
83
+	struct dma_tracker	list[];
9884 };
9985 
10086 
....@@ -224,12 +210,12 @@
224210 static void rsxx_free_dma(struct rsxx_dma_ctrl *ctrl, struct rsxx_dma *dma)
225211 {
226212 	if (dma->cmd != HW_CMD_BLK_DISCARD) {
227
-		if (!pci_dma_mapping_error(ctrl->card->dev, dma->dma_addr)) {
228
-			pci_unmap_page(ctrl->card->dev, dma->dma_addr,
213
+		if (!dma_mapping_error(&ctrl->card->dev->dev, dma->dma_addr)) {
214
+			dma_unmap_page(&ctrl->card->dev->dev, dma->dma_addr,
229215 				       get_dma_size(dma),
230216 				       dma->cmd == HW_CMD_BLK_WRITE ?
231
-						   PCI_DMA_TODEVICE :
232
-						   PCI_DMA_FROMDEVICE);
217
+						   DMA_TO_DEVICE :
218
+						   DMA_FROM_DEVICE);
233219 		}
234220 	}
235221 
....@@ -438,23 +424,23 @@
438424 
439425 		if (dma->cmd != HW_CMD_BLK_DISCARD) {
440426 			if (dma->cmd == HW_CMD_BLK_WRITE)
441
-				dir = PCI_DMA_TODEVICE;
427
+				dir = DMA_TO_DEVICE;
442428 			else
443
-				dir = PCI_DMA_FROMDEVICE;
429
+				dir = DMA_FROM_DEVICE;
444430 
445431 			/*
446
-			 * The function pci_map_page is placed here because we
432
+			 * The function dma_map_page is placed here because we
447433 			 * can only, by design, issue up to 255 commands to the
448434 			 * hardware at one time per DMA channel. So the maximum
449435 			 * amount of mapped memory would be 255 * 4 channels *
450436 			 * 4096 Bytes which is less than 2GB, the limit of a x8
451
-			 * Non-HWWD PCIe slot. This way the pci_map_page
437
+			 * Non-HWWD PCIe slot. This way the dma_map_page
452438 			 * function should never fail because of a lack of
453439 			 * mappable memory.
454440 			 */
455
-			dma->dma_addr = pci_map_page(ctrl->card->dev, dma->page,
441
+			dma->dma_addr = dma_map_page(&ctrl->card->dev->dev, dma->page,
456442 					dma->pg_off, dma->sub_page.cnt << 9, dir);
457
-			if (pci_dma_mapping_error(ctrl->card->dev, dma->dma_addr)) {
443
+			if (dma_mapping_error(&ctrl->card->dev->dev, dma->dma_addr)) {
458444 				push_tracker(ctrl->trackers, tag);
459445 				rsxx_complete_dma(ctrl, dma, DMA_CANCELLED);
460446 				continue;
....@@ -776,10 +762,10 @@
776762 /*----------------- DMA Engine Initialization & Setup -------------------*/
777763 int rsxx_hw_buffers_init(struct pci_dev *dev, struct rsxx_dma_ctrl *ctrl)
778764 {
779
-	ctrl->status.buf = pci_alloc_consistent(dev, STATUS_BUFFER_SIZE8,
780
-				&ctrl->status.dma_addr);
781
-	ctrl->cmd.buf = pci_alloc_consistent(dev, COMMAND_BUFFER_SIZE8,
782
-				&ctrl->cmd.dma_addr);
765
+	ctrl->status.buf = dma_alloc_coherent(&dev->dev, STATUS_BUFFER_SIZE8,
766
+				&ctrl->status.dma_addr, GFP_KERNEL);
767
+	ctrl->cmd.buf = dma_alloc_coherent(&dev->dev, COMMAND_BUFFER_SIZE8,
768
+				&ctrl->cmd.dma_addr, GFP_KERNEL);
783769 	if (ctrl->status.buf == NULL || ctrl->cmd.buf == NULL)
784770 		return -ENOMEM;
785771 
....@@ -962,12 +948,12 @@
962948 			vfree(ctrl->trackers);
963949 
964950 		if (ctrl->status.buf)
965
-			pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
966
-					    ctrl->status.buf,
967
-					    ctrl->status.dma_addr);
951
+			dma_free_coherent(&card->dev->dev, STATUS_BUFFER_SIZE8,
952
+					  ctrl->status.buf,
953
+					  ctrl->status.dma_addr);
968954 		if (ctrl->cmd.buf)
969
-			pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
970
-					    ctrl->cmd.buf, ctrl->cmd.dma_addr);
955
+			dma_free_coherent(&card->dev->dev, COMMAND_BUFFER_SIZE8,
956
+					  ctrl->cmd.buf, ctrl->cmd.dma_addr);
971957 	}
972958 
973959 	return st;
....@@ -1023,10 +1009,10 @@
10231009 
10241010 		vfree(ctrl->trackers);
10251011 
1026
-		pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
1027
-				    ctrl->status.buf, ctrl->status.dma_addr);
1028
-		pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
1029
-				    ctrl->cmd.buf, ctrl->cmd.dma_addr);
1012
+		dma_free_coherent(&card->dev->dev, STATUS_BUFFER_SIZE8,
1013
+				  ctrl->status.buf, ctrl->status.dma_addr);
1014
+		dma_free_coherent(&card->dev->dev, COMMAND_BUFFER_SIZE8,
1015
+				  ctrl->cmd.buf, ctrl->cmd.dma_addr);
10301016 	}
10311017 }
10321018 
....@@ -1059,11 +1045,11 @@
10591045 				card->ctrl[i].stats.reads_issued--;
10601046 
10611047 			if (dma->cmd != HW_CMD_BLK_DISCARD) {
1062
-				pci_unmap_page(card->dev, dma->dma_addr,
1048
+				dma_unmap_page(&card->dev->dev, dma->dma_addr,
10631049 					       get_dma_size(dma),
10641050 					       dma->cmd == HW_CMD_BLK_WRITE ?
1065
-					       PCI_DMA_TODEVICE :
1066
-					       PCI_DMA_FROMDEVICE);
1051
+					       DMA_TO_DEVICE :
1052
+					       DMA_FROM_DEVICE);
10671053 			}
10681054 
10691055 			list_add_tail(&dma->list, &issued_dmas[i]);