add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/scsi/sun_esp.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* sun_esp.c: ESP front-end for Sparc SBUS systems.
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  *
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  * Copyright (C) 2007, 2008 David S. Miller (davem@davemloft.net)
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@@ -80,7 +81,7 @@
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 static int esp_sbus_map_regs(struct esp *esp, int hme)
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 {
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	struct resource *res;
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 	/* On HME, two reg sets exist, first is DVMA,
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@@ -100,11 +101,9 @@
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 static int esp_sbus_map_command_block(struct esp *esp)
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 {
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-	struct platform_device *op = esp->dev;
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-
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-	esp->command_block = dma_alloc_coherent(&op->dev, 16,
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+	esp->command_block = dma_alloc_coherent(esp->dev, 16,
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 						&esp->command_block_dma,
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-						GFP_ATOMIC);
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+						GFP_KERNEL);
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 	if (!esp->command_block)
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 		return -ENOMEM;
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 	return 0;
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@@ -113,7 +112,7 @@
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 static int esp_sbus_register_irq(struct esp *esp)
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 {
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 	struct Scsi_Host *host = esp->host;
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	host->irq = op->archdata.irqs[0];
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 	return request_irq(host->irq, scsi_esp_intr, IRQF_SHARED, "ESP", esp);
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@@ -121,7 +120,7 @@
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 static void esp_get_scsi_id(struct esp *esp, struct platform_device *espdma)
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 {
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	struct device_node *dp;
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 	dp = op->dev.of_node;
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@@ -143,7 +142,7 @@
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 static void esp_get_differential(struct esp *esp)
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 {
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	struct device_node *dp;
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 	dp = op->dev.of_node;
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@@ -155,7 +154,7 @@
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 static void esp_get_clock_params(struct esp *esp)
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 {
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	struct device_node *bus_dp, *dp;
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 	int fmhz;
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@@ -172,7 +171,7 @@
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 static void esp_get_bursts(struct esp *esp, struct platform_device *dma_of)
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 {
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 	struct device_node *dma_dp = dma_of->dev.of_node;
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-	struct platform_device *op = esp->dev;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	struct device_node *dp;
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 	u8 bursts, val;
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@@ -212,38 +211,6 @@
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 	return sbus_readb(esp->regs + (reg * 4UL));
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 }
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-static dma_addr_t sbus_esp_map_single(struct esp *esp, void *buf,
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-				      size_t sz, int dir)
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-{
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-	struct platform_device *op = esp->dev;
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-
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-	return dma_map_single(&op->dev, buf, sz, dir);
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-}
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-
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-static int sbus_esp_map_sg(struct esp *esp, struct scatterlist *sg,
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-				  int num_sg, int dir)
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-{
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-	struct platform_device *op = esp->dev;
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-
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-	return dma_map_sg(&op->dev, sg, num_sg, dir);
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-}
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-
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-static void sbus_esp_unmap_single(struct esp *esp, dma_addr_t addr,
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-				  size_t sz, int dir)
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-{
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-	struct platform_device *op = esp->dev;
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-
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-	dma_unmap_single(&op->dev, addr, sz, dir);
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-}
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-
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-static void sbus_esp_unmap_sg(struct esp *esp, struct scatterlist *sg,
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-			      int num_sg, int dir)
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-{
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-	struct platform_device *op = esp->dev;
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-
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-	dma_unmap_sg(&op->dev, sg, num_sg, dir);
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-}
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-
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 static int sbus_esp_irq_pending(struct esp *esp)
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 {
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 	if (dma_read32(DMA_CSR) & (DMA_HNDL_INTR | DMA_HNDL_ERROR))
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@@ -255,14 +222,13 @@
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 {
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 	int can_do_burst16, can_do_burst32, can_do_burst64;
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 	int can_do_sbus64, lim;
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-	struct platform_device *op;
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+	struct platform_device *op = to_platform_device(esp->dev);
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 	u32 val;
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 	can_do_burst16 = (esp->bursts & DMA_BURST16) != 0;
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 	can_do_burst32 = (esp->bursts & DMA_BURST32) != 0;
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 	can_do_burst64 = 0;
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 	can_do_sbus64 = 0;
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-	op = esp->dev;
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 	if (sbus_can_dma_64bit())
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 		can_do_sbus64 = 1;
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 	if (sbus_can_burst64())
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@@ -474,10 +440,6 @@
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 static const struct esp_driver_ops sbus_esp_ops = {
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 	.esp_write8	=	sbus_esp_write8,
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 	.esp_read8	=	sbus_esp_read8,
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-	.map_single	=	sbus_esp_map_single,
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-	.map_sg		=	sbus_esp_map_sg,
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-	.unmap_single	=	sbus_esp_unmap_single,
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-	.unmap_sg	=	sbus_esp_unmap_sg,
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 	.irq_pending	=	sbus_esp_irq_pending,
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 	.reset_dma	=	sbus_esp_reset_dma,
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 	.dma_drain	=	sbus_esp_dma_drain,
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@@ -504,7 +466,7 @@
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 	esp = shost_priv(host);
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 	esp->host = host;
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-	esp->dev = op;
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+	esp->dev = &op->dev;
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 	esp->ops = &sbus_esp_ops;
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 	if (hme)
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@@ -540,7 +502,7 @@
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 	dev_set_drvdata(&op->dev, esp);
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-	err = scsi_esp_register(esp, &op->dev);
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+	err = scsi_esp_register(esp);
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 	if (err)
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 		goto fail_free_irq;
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@@ -568,11 +530,10 @@
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 	int hme = 0;
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 	int ret;
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-	if (dp->parent &&
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-	    (!strcmp(dp->parent->name, "espdma") ||
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-	     !strcmp(dp->parent->name, "dma")))
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+	if (of_node_name_eq(dp->parent, "espdma") ||
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+	    of_node_name_eq(dp->parent, "dma"))
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 		dma_node = dp->parent;
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-	else if (!strcmp(dp->name, "SUNW,fas")) {
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+	else if (of_node_name_eq(dp, "SUNW,fas")) {
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 		dma_node = op->dev.of_node;
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 		hme = 1;
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 	}
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@@ -645,21 +606,9 @@
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 	.probe		= esp_sbus_probe,
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 	.remove		= esp_sbus_remove,
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 };
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-
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-static int __init sunesp_init(void)
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-{
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-	return platform_driver_register(&esp_sbus_driver);
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-}
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-
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-static void __exit sunesp_exit(void)
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-{
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-	platform_driver_unregister(&esp_sbus_driver);
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-}
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+module_platform_driver(esp_sbus_driver);
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 MODULE_DESCRIPTION("Sun ESP SCSI driver");
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 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
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 MODULE_LICENSE("GPL");
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 MODULE_VERSION(DRV_VERSION);
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-
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-module_init(sunesp_init);
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-module_exit(sunesp_exit);