重命名 AX88772C_eeprom/asix.c 为 asix_mac.c

hc

2024-09-20 a36159eec6ca17402b0e146b86efaf76568dc353

 kernel/arch/powerpc/platforms/powernv/vas.c
..
..
@@ -1,10 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright 2016-17 IBM Corp.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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4
  */
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5
 
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 #define pr_fmt(fmt) "vas: " fmt
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..
@@ -18,7 +14,10 @@
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 #include <linux/of_platform.h>
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 #include <linux/of_address.h>
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 #include <linux/of.h>
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+#include <linux/irqdomain.h>
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+#include <linux/interrupt.h>
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 #include <asm/prom.h>
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+#include <asm/xive.h>
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21
 
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 #include "vas.h"
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23
 
..
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@@ -27,16 +26,47 @@
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26
 
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 static DEFINE_PER_CPU(int, cpu_vas_id);
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28
 
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+static int vas_irq_fault_window_setup(struct vas_instance *vinst)
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+{
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+	char devname[64];
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+	int rc = 0;
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+
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+	snprintf(devname, sizeof(devname), "vas-%d", vinst->vas_id);
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+	rc = request_threaded_irq(vinst->virq, vas_fault_handler,
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+				vas_fault_thread_fn, 0, devname, vinst);
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+
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+	if (rc) {
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+		pr_err("VAS[%d]: Request IRQ(%d) failed with %d\n",
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+				vinst->vas_id, vinst->virq, rc);
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+		goto out;
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+	}
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+
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+	rc = vas_setup_fault_window(vinst);
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+	if (rc)
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+		free_irq(vinst->virq, vinst);
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+
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+out:
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+	return rc;
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+}
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+
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 static int init_vas_instance(struct platform_device *pdev)
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 {
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-	int rc, cpu, vasid;
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-	struct resource *res;
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-	struct vas_instance *vinst;
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54
 	struct device_node *dn = pdev->dev.of_node;
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+	struct vas_instance *vinst;
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+	struct xive_irq_data *xd;
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+	uint32_t chipid, hwirq;
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+	struct resource *res;
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+	int rc, cpu, vasid;
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60
 
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 	rc = of_property_read_u32(dn, "ibm,vas-id", &vasid);
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 	if (rc) {
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 		pr_err("No ibm,vas-id property for %s?\n", pdev->name);
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+		return -ENODEV;
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+	}
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+
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+	rc = of_property_read_u32(dn, "ibm,chip-id", &chipid);
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+	if (rc) {
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+		pr_err("No ibm,chip-id property for %s?\n", pdev->name);
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 		return -ENODEV;
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 	}
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72
 
..
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@@ -73,9 +103,32 @@
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103
 
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 	vinst->paste_win_id_shift = 63 - res->end;
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105
 
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-	pr_devel("Initialized instance [%s, %d], paste_base 0x%llx, "
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-			"paste_win_id_shift 0x%llx\n", pdev->name, vasid,
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-			vinst->paste_base_addr, vinst->paste_win_id_shift);
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+	hwirq = xive_native_alloc_irq_on_chip(chipid);
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+	if (!hwirq) {
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+		pr_err("Inst%d: Unable to allocate global irq for chip %d\n",
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+				vinst->vas_id, chipid);
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+		return -ENOENT;
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+	}
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+
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+	vinst->virq = irq_create_mapping(NULL, hwirq);
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+	if (!vinst->virq) {
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+		pr_err("Inst%d: Unable to map global irq %d\n",
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+				vinst->vas_id, hwirq);
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+		return -EINVAL;
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+	}
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+
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+	xd = irq_get_handler_data(vinst->virq);
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+	if (!xd) {
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+		pr_err("Inst%d: Invalid virq %d\n",
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+				vinst->vas_id, vinst->virq);
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+		return -EINVAL;
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+	}
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+
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+	vinst->irq_port = xd->trig_page;
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+	pr_devel("Initialized instance [%s, %d] paste_base 0x%llx paste_win_id_shift 0x%llx IRQ %d Port 0x%llx\n",
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+			pdev->name, vasid, vinst->paste_base_addr,
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+			vinst->paste_win_id_shift, vinst->virq,
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+			vinst->irq_port);
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132
 
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 	for_each_possible_cpu(cpu) {
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134
 		if (cpu_to_chip_id(cpu) == of_get_ibm_chip_id(dn))
..
..
@@ -86,6 +139,22 @@
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 	list_add(&vinst->node, &vas_instances);
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140
 	mutex_unlock(&vas_mutex);
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141
 
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+	spin_lock_init(&vinst->fault_lock);
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+	/*
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+	 * IRQ and fault handling setup is needed only for user space
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+	 * send windows.
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+	 */
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+	if (vinst->virq) {
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+		rc = vas_irq_fault_window_setup(vinst);
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+		/*
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+		 * Fault window is used only for user space send windows.
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+		 * So if vinst->virq is NULL, tx_win_open returns -ENODEV
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+		 * for user space.
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+		 */
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+		if (rc)
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+			vinst->virq = 0;
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+	}
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+
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 	vas_instance_init_dbgdir(vinst);
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159
 
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 	dev_set_drvdata(&pdev->dev, vinst);