1 // SPDX-License-Identifier: GPL-2.0-or-later
25  * create_local() - allocate and initialize a local LUN information structure
29  * Return: Allocated local llun_info structure on success, NULL on failure
33 	struct cxlflash_cfg *cfg = shost_priv(sdev->host);  in create_local()
34 	struct device *dev = &cfg->dev->dev;  in create_local()
43 	lli->sdev = sdev;  in create_local()
44 	lli->host_no = sdev->host->host_no;  in create_local()
45 	lli->in_table = false;  in create_local()
47 	memcpy(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);  in create_local()
53  * create_global() - allocate and initialize a global LUN information structure
61 	struct cxlflash_cfg *cfg = shost_priv(sdev->host);  in create_global()
62 	struct device *dev = &cfg->dev->dev;  in create_global()
71 	mutex_init(&gli->mutex);  in create_global()
72 	memcpy(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);  in create_global()
78  * lookup_local() - find a local LUN information structure by WWID
79  * @cfg:	Internal structure associated with the host.
82  * Return: Found local lun_info structure on success, NULL on failure
88 	list_for_each_entry_safe(lli, temp, &cfg->lluns, list)  in lookup_local()
89 		if (!memcmp(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))  in lookup_local()
96  * lookup_global() - find a global LUN information structure by WWID
106 		if (!memcmp(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))  in lookup_global()
113  * find_and_create_lun() - find or create a local LUN information structure
117  * The LUN is kept both in a local list (per adapter) and in a global list
118  * (across all adapters). Certain attributes of the LUN are local to the
124  * LUN (one local, one global).
126  * Keep a pointer back from the local to the global entry.
130  * Return: Found/Allocated local lun_info structure on success, NULL on failure
134 	struct cxlflash_cfg *cfg = shost_priv(sdev->host);  in find_and_create_lun()
135 	struct device *dev = &cfg->dev->dev;  in find_and_create_lun()
152 		lli->parent = gli;  in find_and_create_lun()
153 		list_add(&lli->list, &cfg->lluns);  in find_and_create_lun()
164 	lli->parent = gli;  in find_and_create_lun()
165 	list_add(&lli->list, &cfg->lluns);  in find_and_create_lun()
167 	list_add(&gli->list, &global.gluns);  in find_and_create_lun()
175  * cxlflash_term_local_luns() - Delete all entries from local LUN list, free.
176  * @cfg:	Internal structure associated with the host.
183 	list_for_each_entry_safe(lli, temp, &cfg->lluns, list) {  in cxlflash_term_local_luns()
184 		list_del(&lli->list);  in cxlflash_term_local_luns()
191  * cxlflash_list_init() - initializes the global LUN list
201  * cxlflash_term_global_luns() - frees resources associated with global LUN list
209 		list_del(&gli->list);  in cxlflash_term_global_luns()
210 		cxlflash_ba_terminate(&gli->blka.ba_lun);  in cxlflash_term_global_luns()
217  * cxlflash_manage_lun() - handles LUN management activities
225  * Return: 0 on success, -errno on failure
230 	struct cxlflash_cfg *cfg = shost_priv(sdev->host);  in cxlflash_manage_lun()
231 	struct device *dev = &cfg->dev->dev;  in cxlflash_manage_lun()
234 	u64 flags = manage->hdr.flags;  in cxlflash_manage_lun()
235 	u32 chan = sdev->channel;  in cxlflash_manage_lun()
238 	lli = find_and_create_lun(sdev, manage->wwid);  in cxlflash_manage_lun()
240 		__func__, get_unaligned_be64(&manage->wwid[0]),  in cxlflash_manage_lun()
241 		get_unaligned_be64(&manage->wwid[8]), manage->hdr.flags, lli);  in cxlflash_manage_lun()
243 		rc = -ENOMEM;  in cxlflash_manage_lun()
250 		 * in unpacked, AFU-friendly format, and hang LUN reference in  in cxlflash_manage_lun()
253 		lli->port_sel |= CHAN2PORTMASK(chan);  in cxlflash_manage_lun()
254 		lli->lun_id[chan] = lun_to_lunid(sdev->lun);  in cxlflash_manage_lun()
255 		sdev->hostdata = lli;  in cxlflash_manage_lun()
257 		if (lli->parent->mode != MODE_NONE)  in cxlflash_manage_lun()
258 			rc = -EBUSY;  in cxlflash_manage_lun()
261 			 * Clean up local LUN for this port and reset table  in cxlflash_manage_lun()
264 			sdev->hostdata = NULL;  in cxlflash_manage_lun()
265 			lli->port_sel &= ~CHAN2PORTMASK(chan);  in cxlflash_manage_lun()
266 			if (lli->port_sel == 0U)  in cxlflash_manage_lun()
267 				lli->in_table = false;  in cxlflash_manage_lun()
272 		__func__, lli->port_sel, chan, lli->lun_id[chan]);  in cxlflash_manage_lun()