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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/scsi/53c700.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* -*- mode: c; c-basic-offset: 8 -*- */
23 
34 /* NCR (or Symbios) 53c700 and 53c700-66 Driver
....@@ -5,19 +6,6 @@
56  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
67 **-----------------------------------------------------------------------------
78 **  
8
-**  This program is free software; you can redistribute it and/or modify
9
-**  it under the terms of the GNU General Public License as published by
10
-**  the Free Software Foundation; either version 2 of the License, or
11
-**  (at your option) any later version.
12
-**
13
-**  This program is distributed in the hope that it will be useful,
14
-**  but WITHOUT ANY WARRANTY; without even the implied warranty of
15
-**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
-**  GNU General Public License for more details.
17
-**
18
-**  You should have received a copy of the GNU General Public License
19
-**  along with this program; if not, write to the Free Software
20
-**  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
219 **
2210 **-----------------------------------------------------------------------------
2311  */
....@@ -128,9 +116,9 @@
128116 #include <linux/module.h>
129117 #include <linux/interrupt.h>
130118 #include <linux/device.h>
119
+#include <linux/pgtable.h>
131120 #include <asm/dma.h>
132121 #include <asm/io.h>
133
-#include <asm/pgtable.h>
134122 #include <asm/byteorder.h>
135123 
136124 #include <scsi/scsi.h>
....@@ -281,6 +269,27 @@
281269 					      spi_period(SDp->sdev_target));
282270 }
283271 
272
+static inline dma_addr_t virt_to_dma(struct NCR_700_Host_Parameters *h, void *p)
273
+{
274
+	return h->pScript + ((uintptr_t)p - (uintptr_t)h->script);
275
+}
276
+
277
+static inline void dma_sync_to_dev(struct NCR_700_Host_Parameters *h,
278
+		void *addr, size_t size)
279
+{
280
+	if (h->noncoherent)
281
+		dma_sync_single_for_device(h->dev, virt_to_dma(h, addr),
282
+					   size, DMA_BIDIRECTIONAL);
283
+}
284
+
285
+static inline void dma_sync_from_dev(struct NCR_700_Host_Parameters *h,
286
+		void *addr, size_t size)
287
+{
288
+	if (h->noncoherent)
289
+		dma_sync_single_for_device(h->dev, virt_to_dma(h, addr), size,
290
+					   DMA_BIDIRECTIONAL);
291
+}
292
+
284293 struct Scsi_Host *
285294 NCR_700_detect(struct scsi_host_template *tpnt,
286295 	       struct NCR_700_Host_Parameters *hostdata, struct device *dev)
....@@ -295,9 +304,13 @@
295304 	if(tpnt->sdev_attrs == NULL)
296305 		tpnt->sdev_attrs = NCR_700_dev_attrs;
297306 
298
-	memory = dma_alloc_attrs(dev, TOTAL_MEM_SIZE, &pScript,
299
-				 GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
300
-	if(memory == NULL) {
307
+	memory = dma_alloc_coherent(dev, TOTAL_MEM_SIZE, &pScript, GFP_KERNEL);
308
+	if (!memory) {
309
+		hostdata->noncoherent = 1;
310
+		memory = dma_alloc_noncoherent(dev, TOTAL_MEM_SIZE, &pScript,
311
+					 DMA_BIDIRECTIONAL, GFP_KERNEL);
312
+	}
313
+	if (!memory) {
301314 		printk(KERN_ERR "53c700: Failed to allocate memory for driver, detaching\n");
302315 		return NULL;
303316 	}
....@@ -318,7 +331,6 @@
318331 	tpnt->can_queue = NCR_700_COMMAND_SLOTS_PER_HOST;
319332 	tpnt->sg_tablesize = NCR_700_SG_SEGMENTS;
320333 	tpnt->cmd_per_lun = NCR_700_CMD_PER_LUN;
321
-	tpnt->use_clustering = ENABLE_CLUSTERING;
322334 	tpnt->slave_configure = NCR_700_slave_configure;
323335 	tpnt->slave_destroy = NCR_700_slave_destroy;
324336 	tpnt->slave_alloc = NCR_700_slave_alloc;
....@@ -352,11 +364,11 @@
352364 	for (j = 0; j < PATCHES; j++)
353365 		script[LABELPATCHES[j]] = bS_to_host(pScript + SCRIPT[LABELPATCHES[j]]);
354366 	/* now patch up fixed addresses. */
355
-	script_patch_32(hostdata->dev, script, MessageLocation,
367
+	script_patch_32(hostdata, script, MessageLocation,
356368 			pScript + MSGOUT_OFFSET);
357
-	script_patch_32(hostdata->dev, script, StatusAddress,
369
+	script_patch_32(hostdata, script, StatusAddress,
358370 			pScript + STATUS_OFFSET);
359
-	script_patch_32(hostdata->dev, script, ReceiveMsgAddress,
371
+	script_patch_32(hostdata, script, ReceiveMsgAddress,
360372 			pScript + MSGIN_OFFSET);
361373 
362374 	hostdata->script = script;
....@@ -408,8 +420,13 @@
408420 	struct NCR_700_Host_Parameters *hostdata = 
409421 		(struct NCR_700_Host_Parameters *)host->hostdata[0];
410422 
411
-	dma_free_attrs(hostdata->dev, TOTAL_MEM_SIZE, hostdata->script,
412
-		       hostdata->pScript, DMA_ATTR_NON_CONSISTENT);
423
+	if (hostdata->noncoherent)
424
+		dma_free_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
425
+				hostdata->script, hostdata->pScript,
426
+				DMA_BIDIRECTIONAL);
427
+	else
428
+		dma_free_coherent(hostdata->dev, TOTAL_MEM_SIZE,
429
+				  hostdata->script, hostdata->pScript);
413430 	return 1;
414431 }
415432 
....@@ -817,8 +834,8 @@
817834 			shost_printk(KERN_WARNING, host,
818835 				"Unexpected SDTR msg\n");
819836 			hostdata->msgout[0] = A_REJECT_MSG;
820
-			dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
821
-			script_patch_16(hostdata->dev, hostdata->script,
837
+			dma_sync_to_dev(hostdata, hostdata->msgout, 1);
838
+			script_patch_16(hostdata, hostdata->script,
822839 			                MessageCount, 1);
823840 			/* SendMsgOut returns, so set up the return
824841 			 * address */
....@@ -830,9 +847,8 @@
830847 		printk(KERN_INFO "scsi%d: (%d:%d), Unsolicited WDTR after CMD, Rejecting\n",
831848 		       host->host_no, pun, lun);
832849 		hostdata->msgout[0] = A_REJECT_MSG;
833
-		dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
834
-		script_patch_16(hostdata->dev, hostdata->script, MessageCount,
835
-		                1);
850
+		dma_sync_to_dev(hostdata, hostdata->msgout, 1);
851
+		script_patch_16(hostdata, hostdata->script, MessageCount, 1);
836852 		resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
837853 
838854 		break;
....@@ -845,9 +861,8 @@
845861 		printk("\n");
846862 		/* just reject it */
847863 		hostdata->msgout[0] = A_REJECT_MSG;
848
-		dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
849
-		script_patch_16(hostdata->dev, hostdata->script, MessageCount,
850
-		                1);
864
+		dma_sync_to_dev(hostdata, hostdata->msgout, 1);
865
+		script_patch_16(hostdata, hostdata->script, MessageCount, 1);
851866 		/* SendMsgOut returns, so set up the return
852867 		 * address */
853868 		resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
....@@ -930,9 +945,8 @@
930945 		printk("\n");
931946 		/* just reject it */
932947 		hostdata->msgout[0] = A_REJECT_MSG;
933
-		dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
934
-		script_patch_16(hostdata->dev, hostdata->script, MessageCount,
935
-		                1);
948
+		dma_sync_to_dev(hostdata, hostdata->msgout, 1);
949
+		script_patch_16(hostdata, hostdata->script, MessageCount, 1);
936950 		/* SendMsgOut returns, so set up the return
937951 		 * address */
938952 		resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
....@@ -941,7 +955,7 @@
941955 	}
942956 	NCR_700_writel(temp, host, TEMP_REG);
943957 	/* set us up to receive another message */
944
-	dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE, DMA_FROM_DEVICE);
958
+	dma_sync_from_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
945959 	return resume_offset;
946960 }
947961 
....@@ -1021,8 +1035,8 @@
10211035 				slot->SG[1].ins = bS_to_host(SCRIPT_RETURN);
10221036 				slot->SG[1].pAddr = 0;
10231037 				slot->resume_offset = hostdata->pScript;
1024
-				dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG[0])*2, DMA_TO_DEVICE);
1025
-				dma_cache_sync(hostdata->dev, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
1038
+				dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG[0])*2);
1039
+				dma_sync_from_dev(hostdata, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE);
10261040 
10271041 				/* queue the command for reissue */
10281042 				slot->state = NCR_700_SLOT_QUEUED;
....@@ -1142,11 +1156,11 @@
11421156 			hostdata->cmd = slot->cmnd;
11431157 
11441158 			/* re-patch for this command */
1145
-			script_patch_32_abs(hostdata->dev, hostdata->script,
1159
+			script_patch_32_abs(hostdata, hostdata->script,
11461160 			                    CommandAddress, slot->pCmd);
1147
-			script_patch_16(hostdata->dev, hostdata->script,
1161
+			script_patch_16(hostdata, hostdata->script,
11481162 					CommandCount, slot->cmnd->cmd_len);
1149
-			script_patch_32_abs(hostdata->dev, hostdata->script,
1163
+			script_patch_32_abs(hostdata, hostdata->script,
11501164 			                    SGScriptStartAddress,
11511165 					    to32bit(&slot->pSG[0].ins));
11521166 
....@@ -1157,14 +1171,14 @@
11571171 			 * should therefore always clear ACK */
11581172 			NCR_700_writeb(NCR_700_get_SXFER(hostdata->cmd->device),
11591173 				       host, SXFER_REG);
1160
-			dma_cache_sync(hostdata->dev, hostdata->msgin,
1161
-				       MSG_ARRAY_SIZE, DMA_FROM_DEVICE);
1162
-			dma_cache_sync(hostdata->dev, hostdata->msgout,
1163
-				       MSG_ARRAY_SIZE, DMA_TO_DEVICE);
1174
+			dma_sync_from_dev(hostdata, hostdata->msgin,
1175
+				       MSG_ARRAY_SIZE);
1176
+			dma_sync_to_dev(hostdata, hostdata->msgout,
1177
+				       MSG_ARRAY_SIZE);
11641178 			/* I'm just being paranoid here, the command should
11651179 			 * already have been flushed from the cache */
1166
-			dma_cache_sync(hostdata->dev, slot->cmnd->cmnd,
1167
-				       slot->cmnd->cmd_len, DMA_TO_DEVICE);
1180
+			dma_sync_to_dev(hostdata, slot->cmnd->cmnd,
1181
+				       slot->cmnd->cmd_len);
11681182 
11691183 
11701184 			
....@@ -1227,8 +1241,7 @@
12271241 		hostdata->reselection_id = reselection_id;
12281242 		/* just in case we have a stale simple tag message, clear it */
12291243 		hostdata->msgin[1] = 0;
1230
-		dma_cache_sync(hostdata->dev, hostdata->msgin,
1231
-			       MSG_ARRAY_SIZE, DMA_BIDIRECTIONAL);
1244
+		dma_sync_to_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
12321245 		if(hostdata->tag_negotiated & (1<<reselection_id)) {
12331246 			resume_offset = hostdata->pScript + Ent_GetReselectionWithTag;
12341247 		} else {
....@@ -1342,8 +1355,7 @@
13421355 	hostdata->cmd = NULL;
13431356 	/* clear any stale simple tag message */
13441357 	hostdata->msgin[1] = 0;
1345
-	dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE,
1346
-		       DMA_BIDIRECTIONAL);
1358
+	dma_sync_to_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
13471359 
13481360 	if(id == 0xff) {
13491361 		/* Selected as target, Ignore */
....@@ -1440,30 +1452,26 @@
14401452 		NCR_700_set_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
14411453 	}
14421454 
1443
-	script_patch_16(hostdata->dev, hostdata->script, MessageCount, count);
1455
+	script_patch_16(hostdata, hostdata->script, MessageCount, count);
14441456 
1457
+	script_patch_ID(hostdata, hostdata->script, Device_ID, 1<<scmd_id(SCp));
14451458 
1446
-	script_patch_ID(hostdata->dev, hostdata->script,
1447
-			Device_ID, 1<<scmd_id(SCp));
1448
-
1449
-	script_patch_32_abs(hostdata->dev, hostdata->script, CommandAddress,
1459
+	script_patch_32_abs(hostdata, hostdata->script, CommandAddress,
14501460 			    slot->pCmd);
1451
-	script_patch_16(hostdata->dev, hostdata->script, CommandCount,
1452
-	                SCp->cmd_len);
1461
+	script_patch_16(hostdata, hostdata->script, CommandCount, SCp->cmd_len);
14531462 	/* finally plumb the beginning of the SG list into the script
14541463 	 * */
1455
-	script_patch_32_abs(hostdata->dev, hostdata->script,
1464
+	script_patch_32_abs(hostdata, hostdata->script,
14561465 	                    SGScriptStartAddress, to32bit(&slot->pSG[0].ins));
14571466 	NCR_700_clear_fifo(SCp->device->host);
14581467 
14591468 	if(slot->resume_offset == 0)
14601469 		slot->resume_offset = hostdata->pScript;
14611470 	/* now perform all the writebacks and invalidates */
1462
-	dma_cache_sync(hostdata->dev, hostdata->msgout, count, DMA_TO_DEVICE);
1463
-	dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE,
1464
-		       DMA_FROM_DEVICE);
1465
-	dma_cache_sync(hostdata->dev, SCp->cmnd, SCp->cmd_len, DMA_TO_DEVICE);
1466
-	dma_cache_sync(hostdata->dev, hostdata->status, 1, DMA_FROM_DEVICE);
1471
+	dma_sync_to_dev(hostdata, hostdata->msgout, count);
1472
+	dma_sync_from_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
1473
+	dma_sync_to_dev(hostdata, SCp->cmnd, SCp->cmd_len);
1474
+	dma_sync_from_dev(hostdata, hostdata->status, 1);
14671475 
14681476 	/* set the synchronous period/offset */
14691477 	NCR_700_writeb(NCR_700_get_SXFER(SCp->device),
....@@ -1498,10 +1506,8 @@
14981506 		__u8 sstat0 = 0, dstat = 0;
14991507 		__u32 dsp;
15001508 		struct scsi_cmnd *SCp = hostdata->cmd;
1501
-		enum NCR_700_Host_State state;
15021509 
15031510 		handled = 1;
1504
-		state = hostdata->state;
15051511 		SCp = hostdata->cmd;
15061512 
15071513 		if(istat & SCSI_INT_PENDING) {
....@@ -1594,7 +1600,7 @@
15941600 				printk("scsi%d (%d:%d) PHASE MISMATCH IN SEND MESSAGE %d remain, return %p[%04x], phase %s\n", host->host_no, pun, lun, count, (void *)temp, temp - hostdata->pScript, sbcl_to_string(NCR_700_readb(host, SBCL_REG)));
15951601 #endif
15961602 				resume_offset = hostdata->pScript + Ent_SendMessagePhaseMismatch;
1597
-			} else if(dsp >= to32bit(&slot->pSG[0].ins) &&
1603
+			} else if (slot && dsp >= to32bit(&slot->pSG[0].ins) &&
15981604 				  dsp <= to32bit(&slot->pSG[NCR_700_SG_SEGMENTS].ins)) {
15991605 				int data_transfer = NCR_700_readl(host, DBC_REG) & 0xffffff;
16001606 				int SGcount = (dsp - to32bit(&slot->pSG[0].ins))/sizeof(struct NCR_700_SG_List);
....@@ -1639,7 +1645,7 @@
16391645 					slot->SG[i].ins = bS_to_host(SCRIPT_NOP);
16401646 					slot->SG[i].pAddr = 0;
16411647 				}
1642
-				dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG), DMA_TO_DEVICE);
1648
+				dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG));
16431649 				/* and pretend we disconnected after
16441650 				 * the command phase */
16451651 				resume_offset = hostdata->pScript + Ent_MsgInDuringData;
....@@ -1752,7 +1758,6 @@
17521758 	struct NCR_700_Host_Parameters *hostdata = 
17531759 		(struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
17541760 	__u32 move_ins;
1755
-	enum dma_data_direction direction;
17561761 	struct NCR_700_command_slot *slot;
17571762 
17581763 	if(hostdata->command_slot_count >= NCR_700_COMMAND_SLOTS_PER_HOST) {
....@@ -1845,7 +1850,7 @@
18451850 	case REQUEST_SENSE:
18461851 		/* clear the internal sense magic */
18471852 		SCp->cmnd[6] = 0;
1848
-		/* fall through */
1853
+		fallthrough;
18491854 	default:
18501855 		/* OK, get it from the command */
18511856 		switch(SCp->sc_data_direction) {
....@@ -1869,7 +1874,6 @@
18691874 	}
18701875 
18711876 	/* now build the scatter gather list */
1872
-	direction = SCp->sc_data_direction;
18731877 	if(move_ins != 0) {
18741878 		int i;
18751879 		int sg_count;
....@@ -1891,7 +1895,7 @@
18911895 		}
18921896 		slot->SG[i].ins = bS_to_host(SCRIPT_RETURN);
18931897 		slot->SG[i].pAddr = 0;
1894
-		dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG), DMA_TO_DEVICE);
1898
+		dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG));
18951899 		DEBUG((" SETTING %p to %x\n",
18961900 		       (&slot->pSG[i].ins),
18971901 		       slot->SG[i].ins));