Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Greybus Host Device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2014-2015 Google Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright 2014-2015 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/greybus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "greybus_trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_hd_create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_hd_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_hd_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_hd_del);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_hd_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) EXPORT_TRACEPOINT_SYMBOL_GPL(gb_message_submit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static struct ida gb_hd_bus_id_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		 bool async)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	if (!hd || !hd->driver || !hd->driver->output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	return hd->driver->output(hd, req, size, cmd, async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) EXPORT_SYMBOL_GPL(gb_hd_output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static ssize_t bus_id_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 			   struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct gb_host_device *hd = to_gb_host_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return sprintf(buf, "%d\n", hd->bus_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static DEVICE_ATTR_RO(bus_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static struct attribute *bus_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	&dev_attr_bus_id.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) ATTRIBUTE_GROUPS(bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct ida *id_map = &hd->cport_id_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	ret = ida_simple_get(id_map, cport_id, cport_id + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		dev_err(&hd->dev, "failed to reserve cport %u\n", cport_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) EXPORT_SYMBOL_GPL(gb_hd_cport_reserve);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct ida *id_map = &hd->cport_id_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	ida_simple_remove(id_map, cport_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) EXPORT_SYMBOL_GPL(gb_hd_cport_release_reserved);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) /* Locking: Caller guarantees serialisation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			 unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct ida *id_map = &hd->cport_id_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int ida_start, ida_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (hd->driver->cport_allocate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		return hd->driver->cport_allocate(hd, cport_id, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (cport_id < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		ida_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		ida_end = hd->num_cports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	} else if (cport_id < hd->num_cports) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		ida_start = cport_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		ida_end = cport_id + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		dev_err(&hd->dev, "cport %d not available\n", cport_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	return ida_simple_get(id_map, ida_start, ida_end, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) /* Locking: Caller guarantees serialisation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	if (hd->driver->cport_release) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		hd->driver->cport_release(hd, cport_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	ida_simple_remove(&hd->cport_id_map, cport_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void gb_hd_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct gb_host_device *hd = to_gb_host_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	trace_gb_hd_release(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (hd->svc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		gb_svc_put(hd->svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	ida_simple_remove(&gb_hd_bus_id_map, hd->bus_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	ida_destroy(&hd->cport_id_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	kfree(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct device_type greybus_hd_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	.name		= "greybus_host_device",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	.release	= gb_hd_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 				    struct device *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				    size_t buffer_size_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 				    size_t num_cports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct gb_host_device *hd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 * Validate that the driver implements all of the callbacks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	 * so that we don't have to every time we make them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if ((!driver->message_send) || (!driver->message_cancel)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		dev_err(parent, "mandatory hd-callbacks missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (buffer_size_max < GB_OPERATION_MESSAGE_SIZE_MIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		dev_err(parent, "greybus host-device buffers too small\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (num_cports == 0 || num_cports > CPORT_ID_MAX + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		dev_err(parent, "Invalid number of CPorts: %zu\n", num_cports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	 * Make sure to never allocate messages larger than what the Greybus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	 * protocol supports.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (buffer_size_max > GB_OPERATION_MESSAGE_SIZE_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		dev_warn(parent, "limiting buffer size to %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			 GB_OPERATION_MESSAGE_SIZE_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		buffer_size_max = GB_OPERATION_MESSAGE_SIZE_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	hd = kzalloc(sizeof(*hd) + driver->hd_priv_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (!hd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	ret = ida_simple_get(&gb_hd_bus_id_map, 1, 0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		kfree(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	hd->bus_id = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	hd->driver = driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	INIT_LIST_HEAD(&hd->modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	INIT_LIST_HEAD(&hd->connections);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	ida_init(&hd->cport_id_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	hd->buffer_size_max = buffer_size_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	hd->num_cports = num_cports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	hd->dev.parent = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	hd->dev.bus = &greybus_bus_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	hd->dev.type = &greybus_hd_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	hd->dev.groups = bus_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	hd->dev.dma_mask = hd->dev.parent->dma_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	device_initialize(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	dev_set_name(&hd->dev, "greybus%d", hd->bus_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	trace_gb_hd_create(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	hd->svc = gb_svc_create(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (!hd->svc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		dev_err(&hd->dev, "failed to create svc\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		put_device(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return hd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) EXPORT_SYMBOL_GPL(gb_hd_create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int gb_hd_add(struct gb_host_device *hd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	ret = device_add(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	ret = gb_svc_add(hd->svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		device_del(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	trace_gb_hd_add(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) EXPORT_SYMBOL_GPL(gb_hd_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void gb_hd_del(struct gb_host_device *hd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	trace_gb_hd_del(hd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	 * Tear down the svc and flush any on-going hotplug processing before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	 * removing the remaining interfaces.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	gb_svc_del(hd->svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	device_del(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) EXPORT_SYMBOL_GPL(gb_hd_del);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void gb_hd_shutdown(struct gb_host_device *hd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	gb_svc_del(hd->svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) EXPORT_SYMBOL_GPL(gb_hd_shutdown);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) void gb_hd_put(struct gb_host_device *hd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	put_device(&hd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) EXPORT_SYMBOL_GPL(gb_hd_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int __init gb_hd_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ida_init(&gb_hd_bus_id_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) void gb_hd_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	ida_destroy(&gb_hd_bus_id_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }