rtl88x2CE_WiFi_linux add concurrent mode

hc

2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad

 kernel/samples/vfio-mdev/mtty.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
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  * Mediated virtual PCI serial host device driver
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  *
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@@ -5,13 +6,8 @@
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  *     Author: Neo Jia <cjia@nvidia.com>
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7
  *             Kirti Wankhede <kwankhede@nvidia.com>
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  *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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9
  * Sample driver that creates mdev device that simulates serial port over PCI
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  * card.
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- *
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11
  */
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12
 
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 #include <linux/init.h>
..
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@@ -72,7 +68,7 @@
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  * Global Structures
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69
  */
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70
 
75
-struct mtty_dev {
71
+static struct mtty_dev {
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72
 	dev_t		vd_devt;
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 	struct class	*vd_class;
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74
 	struct cdev	vd_cdev;
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@@ -88,7 +84,7 @@
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 };
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85
 
90
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 #if defined(DEBUG_REGS)
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-const char *wr_reg[] = {
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+static const char *wr_reg[] = {
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 	"TX",
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 	"IER",
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 	"FCR",
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@@ -99,7 +95,7 @@
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 	"SCR"
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96
 };
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97
 
102
-const char *rd_reg[] = {
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+static const char *rd_reg[] = {
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 	"RX",
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100
 	"IER",
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101
 	"IIR",
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@@ -147,8 +143,8 @@
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 	int nr_ports;
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144
 };
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145
 
150
-struct mutex mdev_list_lock;
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-struct list_head mdev_devices_list;
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+static struct mutex mdev_list_lock;
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+static struct list_head mdev_devices_list;
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148
 
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149
 static const struct file_operations vd_fops = {
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150
 	.owner          = THIS_MODULE,
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@@ -156,22 +152,11 @@
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152
 
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 /* function prototypes */
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154
 
159
-static int mtty_trigger_interrupt(uuid_le uuid);
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+static int mtty_trigger_interrupt(struct mdev_state *mdev_state);
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156
 
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 /* Helper functions */
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-static struct mdev_state *find_mdev_state_by_uuid(uuid_le uuid)
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-{
164
-	struct mdev_state *mds;
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158
 
166
-	list_for_each_entry(mds, &mdev_devices_list, next) {
167
-		if (uuid_le_cmp(mdev_uuid(mds->mdev), uuid) == 0)
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-			return mds;
169
-	}
170
-
171
-	return NULL;
172
-}
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-
174
-void dump_buffer(u8 *buf, uint32_t count)
159
+static void dump_buffer(u8 *buf, uint32_t count)
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160
 {
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161
 #if defined(DEBUG)
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162
 	int i;
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@@ -341,8 +326,7 @@
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 				pr_err("Serial port %d: Fifo level trigger\n",
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327
 					index);
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328
 #endif
344
-				mtty_trigger_interrupt(
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-						mdev_uuid(mdev_state->mdev));
329
+				mtty_trigger_interrupt(mdev_state);
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330
 			}
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331
 		} else {
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332
 #if defined(DEBUG_INTR)
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@@ -356,8 +340,7 @@
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340
 			 */
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341
 			if (mdev_state->s[index].uart_reg[UART_IER] &
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342
 								UART_IER_RLSI)
359
-				mtty_trigger_interrupt(
360
-						mdev_uuid(mdev_state->mdev));
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+				mtty_trigger_interrupt(mdev_state);
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344
 		}
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345
 		mutex_unlock(&mdev_state->rxtx_lock);
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346
 		break;
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@@ -376,8 +359,7 @@
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 				pr_err("Serial port %d: IER_THRI write\n",
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 					index);
378
361
 #endif
379
-				mtty_trigger_interrupt(
380
-						mdev_uuid(mdev_state->mdev));
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+				mtty_trigger_interrupt(mdev_state);
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363
 			}
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364
 
383
365
 			mutex_unlock(&mdev_state->rxtx_lock);
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@@ -448,7 +430,7 @@
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430
 #if defined(DEBUG_INTR)
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 			pr_err("Serial port %d: MCR_OUT2 write\n", index);
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 #endif
451
-			mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
433
+			mtty_trigger_interrupt(mdev_state);
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434
 		}
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435
 
454
436
 		if ((mdev_state->s[index].uart_reg[UART_IER] & UART_IER_MSI) &&
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@@ -456,7 +438,7 @@
456
438
 #if defined(DEBUG_INTR)
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 			pr_err("Serial port %d: MCR RTS/DTR write\n", index);
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440
 #endif
459
-			mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
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+			mtty_trigger_interrupt(mdev_state);
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442
 		}
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443
 		break;
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444
 
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@@ -507,8 +489,7 @@
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489
 #endif
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 			if (mdev_state->s[index].uart_reg[UART_IER] &
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491
 							 UART_IER_THRI)
510
-				mtty_trigger_interrupt(
511
-					mdev_uuid(mdev_state->mdev));
492
+				mtty_trigger_interrupt(mdev_state);
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493
 		}
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494
 		mutex_unlock(&mdev_state->rxtx_lock);
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495
 
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@@ -727,7 +708,7 @@
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708
 	return ret;
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709
 }
729
710
 
730
-int mtty_create(struct kobject *kobj, struct mdev_device *mdev)
711
+static int mtty_create(struct kobject *kobj, struct mdev_device *mdev)
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 {
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713
 	struct mdev_state *mdev_state;
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 	char name[MTTY_STRING_LEN];
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@@ -777,7 +758,7 @@
777
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 	return 0;
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 }
779
760
 
780
-int mtty_remove(struct mdev_device *mdev)
761
+static int mtty_remove(struct mdev_device *mdev)
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762
 {
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 	struct mdev_state *mds, *tmp_mds;
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764
 	struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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@@ -799,7 +780,7 @@
799
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 	return ret;
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781
 }
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782
 
802
-int mtty_reset(struct mdev_device *mdev)
783
+static int mtty_reset(struct mdev_device *mdev)
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784
 {
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785
 	struct mdev_state *mdev_state;
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786
 
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@@ -815,8 +796,8 @@
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 	return 0;
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 }
817
798
 
818
-ssize_t mtty_read(struct mdev_device *mdev, char __user *buf, size_t count,
819
-		  loff_t *ppos)
799
+static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
800
+			 size_t count, loff_t *ppos)
820
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 {
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 	unsigned int done = 0;
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 	int ret;
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@@ -874,7 +855,7 @@
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 	return -EFAULT;
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 }
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857
 
877
-ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
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+static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
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 		   size_t count, loff_t *ppos)
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 {
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 	unsigned int done = 0;
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@@ -1032,17 +1013,9 @@
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 	return ret;
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 }
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1015
 
1035
-static int mtty_trigger_interrupt(uuid_le uuid)
1016
+static int mtty_trigger_interrupt(struct mdev_state *mdev_state)
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1017
 {
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1018
 	int ret = -1;
1038
-	struct mdev_state *mdev_state;
1039
-
1040
-	mdev_state = find_mdev_state_by_uuid(uuid);
1041
-
1042
-	if (!mdev_state) {
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-		pr_info("%s: mdev not found\n", __func__);
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-		return -EINVAL;
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-	}
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1019
 
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1020
 	if ((mdev_state->irq_index == VFIO_PCI_MSI_IRQ_INDEX) &&
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1021
 	    (!mdev_state->msi_evtfd))
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@@ -1067,7 +1040,7 @@
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 	return ret;
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1041
 }
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1042
 
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-int mtty_get_region_info(struct mdev_device *mdev,
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+static int mtty_get_region_info(struct mdev_device *mdev,
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 			 struct vfio_region_info *region_info,
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 			 u16 *cap_type_id, void **cap_type)
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 {
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@@ -1116,7 +1089,8 @@
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 	return 0;
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1090
 }
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1091
 
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-int mtty_get_irq_info(struct mdev_device *mdev, struct vfio_irq_info *irq_info)
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+static int mtty_get_irq_info(struct mdev_device *mdev,
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+			     struct vfio_irq_info *irq_info)
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 {
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 	switch (irq_info->index) {
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 	case VFIO_PCI_INTX_IRQ_INDEX:
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@@ -1140,7 +1114,7 @@
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 	return 0;
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 }
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1116
 
1143
-int mtty_get_device_info(struct mdev_device *mdev,
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+static int mtty_get_device_info(struct mdev_device *mdev,
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 			 struct vfio_device_info *dev_info)
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 {
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1120
 	dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
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@@ -1272,13 +1246,13 @@
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 	return -ENOTTY;
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1247
 }
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1248
 
1275
-int mtty_open(struct mdev_device *mdev)
1249
+static int mtty_open(struct mdev_device *mdev)
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1250
 {
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1251
 	pr_info("%s\n", __func__);
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1252
 	return 0;
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1253
 }
1280
1254
 
1281
-void mtty_close(struct mdev_device *mdev)
1255
+static void mtty_close(struct mdev_device *mdev)
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1256
 {
1283
1257
 	pr_info("%s\n", __func__);
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 }
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@@ -1302,7 +1276,7 @@
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 	.attrs = mtty_dev_attrs,
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1277
 };
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1278
 
1305
-const struct attribute_group *mtty_dev_groups[] = {
1279
+static const struct attribute_group *mtty_dev_groups[] = {
1306
1280
 	&mtty_dev_group,
1307
1281
 	NULL,
1308
1282
 };
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@@ -1329,7 +1303,7 @@
1329
1303
 	.attrs = mdev_dev_attrs,
1330
1304
 };
1331
1305
 
1332
-const struct attribute_group *mdev_dev_groups[] = {
1306
+static const struct attribute_group *mdev_dev_groups[] = {
1333
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 	&mdev_dev_group,
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1308
 	NULL,
1335
1309
 };
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@@ -1351,7 +1325,7 @@
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1325
 	return -EINVAL;
1352
1326
 }
1353
1327
 
1354
-MDEV_TYPE_ATTR_RO(name);
1328
+static MDEV_TYPE_ATTR_RO(name);
1355
1329
 
1356
1330
 static ssize_t
1357
1331
 available_instances_show(struct kobject *kobj, struct device *dev, char *buf)
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@@ -1379,7 +1353,7 @@
1379
1353
 	return sprintf(buf, "%d\n", (MAX_MTTYS - used)/ports);
1380
1354
 }
1381
1355
 
1382
-MDEV_TYPE_ATTR_RO(available_instances);
1356
+static MDEV_TYPE_ATTR_RO(available_instances);
1383
1357
 
1384
1358
 
1385
1359
 static ssize_t device_api_show(struct kobject *kobj, struct device *dev,
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@@ -1388,7 +1362,7 @@
1388
1362
 	return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
1389
1363
 }
1390
1364
 
1391
-MDEV_TYPE_ATTR_RO(device_api);
1365
+static MDEV_TYPE_ATTR_RO(device_api);
1392
1366
 
1393
1367
 static struct attribute *mdev_types_attrs[] = {
1394
1368
 	&mdev_type_attr_name.attr,
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@@ -1407,7 +1381,7 @@
1407
1381
 	.attrs = mdev_types_attrs,
1408
1382
 };
1409
1383
 
1410
-struct attribute_group *mdev_type_groups[] = {
1384
+static struct attribute_group *mdev_type_groups[] = {
1411
1385
 	&mdev_type_group1,
1412
1386
 	&mdev_type_group2,
1413
1387
 	NULL,
..
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@@ -1442,7 +1416,8 @@
1442
1416
 
1443
1417
 	idr_init(&mtty_dev.vd_idr);
1444
1418
 
1445
-	ret = alloc_chrdev_region(&mtty_dev.vd_devt, 0, MINORMASK, MTTY_NAME);
1419
+	ret = alloc_chrdev_region(&mtty_dev.vd_devt, 0, MINORMASK + 1,
1420
+				  MTTY_NAME);
1446
1421
 
1447
1422
 	if (ret < 0) {
1448
1423
 		pr_err("Error: failed to register mtty_dev, err:%d\n", ret);
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@@ -1450,7 +1425,7 @@
1450
1425
 	}
1451
1426
 
1452
1427
 	cdev_init(&mtty_dev.vd_cdev, &vd_fops);
1453
-	cdev_add(&mtty_dev.vd_cdev, mtty_dev.vd_devt, MINORMASK);
1428
+	cdev_add(&mtty_dev.vd_cdev, mtty_dev.vd_devt, MINORMASK + 1);
1454
1429
 
1455
1430
 	pr_info("major_number:%d\n", MAJOR(mtty_dev.vd_devt));
1456
1431
 
..
..
@@ -1487,7 +1462,7 @@
1487
1462
 
1488
1463
 failed1:
1489
1464
 	cdev_del(&mtty_dev.vd_cdev);
1490
-	unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK);
1465
+	unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
1491
1466
 
1492
1467
 all_done:
1493
1468
 	return ret;
..
..
@@ -1501,7 +1476,7 @@
1501
1476
 	device_unregister(&mtty_dev.dev);
1502
1477
 	idr_destroy(&mtty_dev.vd_idr);
1503
1478
 	cdev_del(&mtty_dev.vd_cdev);
1504
-	unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK);
1479
+	unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
1505
1480
 	class_destroy(mtty_dev.vd_class);
1506
1481
 	mtty_dev.vd_class = NULL;
1507
1482
 	pr_info("mtty_dev: Unloaded!\n");