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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/drivers/parisc/ccio-dma.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23 ** ccio-dma.c:
34 **	DMA management routines for first generation cache-coherent machines.
....@@ -7,10 +8,6 @@
78 **	(c) Copyright 2000 Ryan Bradetich
89 **	(c) Copyright 2000 Hewlett-Packard Company
910 **
10
-** This program is free software; you can redistribute it and/or modify
11
-** it under the terms of the GNU General Public License as published by
12
-** the Free Software Foundation; either version 2 of the License, or
13
-** (at your option) any later version.
1411 **
1512 **
1613 **  "Real Mode" operation refers to U2/Uturn chip operation.
....@@ -42,6 +39,7 @@
4239 #include <linux/reboot.h>
4340 #include <linux/proc_fs.h>
4441 #include <linux/seq_file.h>
42
+#include <linux/dma-map-ops.h>
4543 #include <linux/scatterlist.h>
4644 #include <linux/iommu-helper.h>
4745 #include <linux/export.h>
....@@ -54,6 +52,8 @@
5452 #include <asm/io.h>
5553 #include <asm/hardware.h>       /* for register_module() */
5654 #include <asm/parisc-device.h>
55
+
56
+#include "iommu.h"
5757 
5858 /* 
5959 ** Choose "ccio" since that's what HP-UX calls it.
....@@ -109,8 +109,6 @@
109109 #define IOA_NORMAL_MODE      0x00020080 /* IO_CONTROL to turn on CCIO        */
110110 #define CMD_TLB_DIRECT_WRITE 35         /* IO_COMMAND for I/O TLB Writes     */
111111 #define CMD_TLB_PURGE        33         /* IO_COMMAND to Purge I/O TLB entry */
112
-
113
-#define CCIO_MAPPING_ERROR    (~(dma_addr_t)0)
114112 
115113 struct ioa_registers {
116114         /* Runway Supervisory Set */
....@@ -359,8 +357,7 @@
359357 	** ggg sacrifices another 710 to the computer gods.
360358 	*/
361359 
362
-	boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1,
363
-			      1ULL << IOVP_SHIFT) >> IOVP_SHIFT;
360
+	boundary_size = dma_get_seg_boundary_nr_pages(dev, IOVP_SHIFT);
364361 
365362 	if (pages_needed <= 8) {
366363 		/*
....@@ -570,7 +567,7 @@
570567 	** "hints" parm includes the VALID bit!
571568 	** "dep" clobbers the physical address offset bits as well.
572569 	*/
573
-	pa = virt_to_phys(vba);
570
+	pa = lpa(vba);
574571 	asm volatile("depw  %1,31,12,%0" : "+r" (pa) : "r" (hints));
575572 	((u32 *)pdir_ptr)[1] = (u32) pa;
576573 
....@@ -607,14 +604,13 @@
607604 	**        PCX-T'? Don't know. (eg C110 or similar K-class)
608605 	**
609606 	** See PDC_MODEL/option 0/SW_CAP word for "Non-coherent IO-PDIR bit".
610
-	** Hopefully we can patch (NOP) these out at boot time somehow.
611607 	**
612608 	** "Since PCX-U employs an offset hash that is incompatible with
613609 	** the real mode coherence index generation of U2, the PDIR entry
614610 	** must be flushed to memory to retain coherence."
615611 	*/
616
-	asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
617
-	asm volatile("sync");
612
+	asm_io_fdc(pdir_ptr);
613
+	asm_io_sync();
618614 }
619615 
620616 /**
....@@ -680,17 +676,14 @@
680676 		** FIXME: PCX_W platforms don't need FDC/SYNC. (eg C360)
681677 		**   PCX-U/U+ do. (eg C200/C240)
682678 		** See PDC_MODEL/option 0/SW_CAP for "Non-coherent IO-PDIR bit".
683
-		**
684
-		** Hopefully someone figures out how to patch (NOP) the
685
-		** FDC/SYNC out at boot time.
686679 		*/
687
-		asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr[7]));
680
+		asm_io_fdc(pdir_ptr);
688681 
689682 		iovp     += IOVP_SIZE;
690683 		byte_cnt -= IOVP_SIZE;
691684 	}
692685 
693
-	asm volatile("sync");
686
+	asm_io_sync();
694687 	ccio_clear_io_tlb(ioc, CCIO_IOVP(iova), saved_byte_cnt);
695688 }
696689 
....@@ -714,8 +707,8 @@
714707 		return 0;
715708 	}
716709 
717
-	/* only support 32-bit devices (ie PCI/GSC) */
718
-	return (int)(mask == 0xffffffffUL);
710
+	/* only support 32-bit or better devices (ie PCI/GSC) */
711
+	return (int)(mask >= 0xffffffffUL);
719712 }
720713 
721714 /**
....@@ -742,7 +735,7 @@
742735 	BUG_ON(!dev);
743736 	ioc = GET_IOC(dev);
744737 	if (!ioc)
745
-		return CCIO_MAPPING_ERROR;
738
+		return DMA_MAPPING_ERROR;
746739 
747740 	BUG_ON(size <= 0);
748741 
....@@ -1024,11 +1017,6 @@
10241017 	DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents);
10251018 }
10261019 
1027
-static int ccio_mapping_error(struct device *dev, dma_addr_t dma_addr)
1028
-{
1029
-	return dma_addr == CCIO_MAPPING_ERROR;
1030
-}
1031
-
10321020 static const struct dma_map_ops ccio_ops = {
10331021 	.dma_supported =	ccio_dma_supported,
10341022 	.alloc =		ccio_alloc,
....@@ -1037,7 +1025,9 @@
10371025 	.unmap_page =		ccio_unmap_page,
10381026 	.map_sg = 		ccio_map_sg,
10391027 	.unmap_sg = 		ccio_unmap_sg,
1040
-	.mapping_error =	ccio_mapping_error,
1028
+	.get_sgtable =		dma_common_get_sgtable,
1029
+	.alloc_pages =		dma_common_alloc_pages,
1030
+	.free_pages =		dma_common_free_pages,
10411031 };
10421032 
10431033 #ifdef CONFIG_PROC_FS
....@@ -1254,7 +1244,7 @@
12541244 	** Hot-Plug/Removal of PCI cards. (aka PCI OLARD).
12551245 	*/
12561246 
1257
-	iova_space_size = (u32) (totalram_pages / count_parisc_driver(&ccio_driver));
1247
+	iova_space_size = (u32) (totalram_pages() / count_parisc_driver(&ccio_driver));
12581248 
12591249 	/* limit IOVA space size to 1MB-1GB */
12601250 
....@@ -1293,7 +1283,7 @@
12931283 
12941284 	DBG_INIT("%s() hpa 0x%p mem %luMB IOV %dMB (%d bits)\n",
12951285 			__func__, ioc->ioc_regs,
1296
-			(unsigned long) totalram_pages >> (20 - PAGE_SHIFT),
1286
+			(unsigned long) totalram_pages() >> (20 - PAGE_SHIFT),
12971287 			iova_space_size>>20,
12981288 			iov_order + PAGE_SHIFT);
12991289 
....@@ -1390,15 +1380,17 @@
13901380 	}
13911381 }
13921382 
1393
-static void __init ccio_init_resources(struct ioc *ioc)
1383
+static int __init ccio_init_resources(struct ioc *ioc)
13941384 {
13951385 	struct resource *res = ioc->mmio_region;
13961386 	char *name = kmalloc(14, GFP_KERNEL);
1397
-
1387
+	if (unlikely(!name))
1388
+		return -ENOMEM;
13981389 	snprintf(name, 14, "GSC Bus [%d/]", ioc->hw_path);
13991390 
14001391 	ccio_init_resource(res, name, &ioc->ioc_regs->io_io_low);
14011392 	ccio_init_resource(res + 1, name, &ioc->ioc_regs->io_io_low_hv);
1393
+	return 0;
14021394 }
14031395 
14041396 static int new_ioc_area(struct resource *res, unsigned long size,
....@@ -1528,6 +1520,7 @@
15281520 {
15291521 	int i;
15301522 	struct ioc *ioc, **ioc_p = &ioc_list;
1523
+	struct pci_hba_data *hba;
15311524 
15321525 	ioc = kzalloc(sizeof(struct ioc), GFP_KERNEL);
15331526 	if (ioc == NULL) {
....@@ -1546,19 +1539,25 @@
15461539 	*ioc_p = ioc;
15471540 
15481541 	ioc->hw_path = dev->hw_path;
1549
-	ioc->ioc_regs = ioremap_nocache(dev->hpa.start, 4096);
1542
+	ioc->ioc_regs = ioremap(dev->hpa.start, 4096);
15501543 	if (!ioc->ioc_regs) {
15511544 		kfree(ioc);
15521545 		return -ENOMEM;
15531546 	}
15541547 	ccio_ioc_init(ioc);
1555
-	ccio_init_resources(ioc);
1548
+	if (ccio_init_resources(ioc)) {
1549
+		iounmap(ioc->ioc_regs);
1550
+		kfree(ioc);
1551
+		return -ENOMEM;
1552
+	}
15561553 	hppa_dma_ops = &ccio_ops;
1557
-	dev->dev.platform_data = kzalloc(sizeof(struct pci_hba_data), GFP_KERNEL);
15581554 
1555
+	hba = kzalloc(sizeof(*hba), GFP_KERNEL);
15591556 	/* if this fails, no I/O cards will work, so may as well bug */
1560
-	BUG_ON(dev->dev.platform_data == NULL);
1561
-	HBA_DATA(dev->dev.platform_data)->iommu = ioc;
1557
+	BUG_ON(hba == NULL);
1558
+
1559
+	hba->iommu = ioc;
1560
+	dev->dev.platform_data = hba;
15621561 
15631562 #ifdef CONFIG_PROC_FS
15641563 	if (ioc_count == 0) {