linux-kernel - [PATCH 09/28] MIPS/jazzdma: remove the unused vdma

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Message-Id: <20200819065555.1802761-10-hch@lst.de>
Date:   Wed, 19 Aug 2020 08:55:36 +0200
From:   Christoph Hellwig <hch@....de>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Joonyoung Shim <jy0922.shim@...sung.com>,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Pawel Osciak <pawel@...iak.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Matt Porter <mporter@...nel.crashing.org>,
        iommu@...ts.linux-foundation.org
Cc:     Tom Lendacky <thomas.lendacky@....com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, nouveau@...ts.freedesktop.org,
        netdev@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-scsi@...r.kernel.org, linux-mm@...ck.org,
        alsa-devel@...a-project.org
Subject: [PATCH 09/28] MIPS/jazzdma: remove the unused vdma_remap function

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/mips/include/asm/jazzdma.h |  2 -
 arch/mips/jazz/jazzdma.c        | 70 ---------------------------------
 2 files changed, 72 deletions(-)

diff --git a/arch/mips/include/asm/jazzdma.h b/arch/mips/include/asm/jazzdma.h
index d13f940022d5f9..c831da7fa89803 100644
--- a/arch/mips/include/asm/jazzdma.h
+++ b/arch/mips/include/asm/jazzdma.h
@@ -10,8 +10,6 @@
  */
 extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
 extern int vdma_free(unsigned long laddr);
-extern int vdma_remap(unsigned long laddr, unsigned long paddr,
-		      unsigned long size);
 extern unsigned long vdma_phys2log(unsigned long paddr);
 extern unsigned long vdma_log2phys(unsigned long laddr);
 extern void vdma_stats(void);		/* for debugging only */
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
index 014773f0bfcd74..fe40dbed04c1d6 100644
--- a/arch/mips/jazz/jazzdma.c
+++ b/arch/mips/jazz/jazzdma.c
@@ -209,76 +209,6 @@ int vdma_free(unsigned long laddr)
 
 EXPORT_SYMBOL(vdma_free);
 
-/*
- * Map certain page(s) to another physical address.
- * Caller must have allocated the page(s) before.
- */
-int vdma_remap(unsigned long laddr, unsigned long paddr, unsigned long size)
-{
-	int first, pages;
-
-	if (laddr > 0xffffff) {
-		if (vdma_debug)
-			printk
-			    ("vdma_map: Invalid logical address: %08lx\n",
-			     laddr);
-		return -EINVAL; /* invalid logical address */
-	}
-	if (paddr > 0x1fffffff) {
-		if (vdma_debug)
-			printk
-			    ("vdma_map: Invalid physical address: %08lx\n",
-			     paddr);
-		return -EINVAL; /* invalid physical address */
-	}
-
-	pages = (((paddr & (VDMA_PAGESIZE - 1)) + size) >> 12) + 1;
-	first = laddr >> 12;
-	if (vdma_debug)
-		printk("vdma_remap: first=%x, pages=%x\n", first, pages);
-	if (first + pages > VDMA_PGTBL_ENTRIES) {
-		if (vdma_debug)
-			printk("vdma_alloc: Invalid size: %08lx\n", size);
-		return -EINVAL;
-	}
-
-	paddr &= ~(VDMA_PAGESIZE - 1);
-	while (pages > 0 && first < VDMA_PGTBL_ENTRIES) {
-		if (pgtbl[first].owner != laddr) {
-			if (vdma_debug)
-				printk("Trying to remap other's pages.\n");
-			return -EPERM;	/* not owner */
-		}
-		pgtbl[first].frame = paddr;
-		paddr += VDMA_PAGESIZE;
-		first++;
-		pages--;
-	}
-
-	/*
-	 * Update translation table
-	 */
-	r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
-
-	if (vdma_debug > 2) {
-		int i;
-		pages = (((paddr & (VDMA_PAGESIZE - 1)) + size) >> 12) + 1;
-		first = laddr >> 12;
-		printk("LADDR: ");
-		for (i = first; i < first + pages; i++)
-			printk("%08x ", i << 12);
-		printk("\nPADDR: ");
-		for (i = first; i < first + pages; i++)
-			printk("%08x ", pgtbl[i].frame);
-		printk("\nOWNER: ");
-		for (i = first; i < first + pages; i++)
-			printk("%08x ", pgtbl[i].owner);
-		printk("\n");
-	}
-
-	return 0;
-}
-
 /*
  * Translate a physical address to a logical address.
  * This will return the logical address of the first
-- 
2.28.0