1 // SPDX-License-Identifier: GPL-2.0+
6 /* this file is part of ehci-hcd.c */
8 /*-------------------------------------------------------------------------*/
12  *	- data used only by the HCD ... kmalloc is fine
13  *	- async and periodic schedules, shared by HC and HCD ... these
15  *	- driver buffers, read/written by HC ... single shot DMA mapped
21 /*-------------------------------------------------------------------------*/
29 	qtd->qtd_dma = dma;  in ehci_qtd_init()
30 	qtd->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);  in ehci_qtd_init()
31 	qtd->hw_next = EHCI_LIST_END(ehci);  in ehci_qtd_init()
32 	qtd->hw_alt_next = EHCI_LIST_END(ehci);  in ehci_qtd_init()
33 	INIT_LIST_HEAD (&qtd->qtd_list);  in ehci_qtd_init()
41 	qtd = dma_pool_alloc (ehci->qtd_pool, flags, &dma);  in ehci_qtd_alloc()
50 	dma_pool_free (ehci->qtd_pool, qtd, qtd->qtd_dma);  in ehci_qtd_free()
57 	if (!list_empty (&qh->qtd_list) || qh->qh_next.ptr) {  in qh_destroy()
61 	if (qh->dummy)  in qh_destroy()
62 		ehci_qtd_free (ehci, qh->dummy);  in qh_destroy()
63 	dma_pool_free(ehci->qh_pool, qh->hw, qh->qh_dma);  in qh_destroy()
75 	qh->hw = (struct ehci_qh_hw *)  in ehci_qh_alloc()
76 		dma_pool_zalloc(ehci->qh_pool, flags, &dma);  in ehci_qh_alloc()
77 	if (!qh->hw)  in ehci_qh_alloc()
79 	qh->qh_dma = dma;  in ehci_qh_alloc()
80 	// INIT_LIST_HEAD (&qh->qh_list);  in ehci_qh_alloc()
81 	INIT_LIST_HEAD (&qh->qtd_list);  in ehci_qh_alloc()
82 	INIT_LIST_HEAD(&qh->unlink_node);  in ehci_qh_alloc()
85 	qh->dummy = ehci_qtd_alloc (ehci, flags);  in ehci_qh_alloc()
86 	if (qh->dummy == NULL) {  in ehci_qh_alloc()
93 	dma_pool_free(ehci->qh_pool, qh->hw, qh->qh_dma);  in ehci_qh_alloc()
99 /*-------------------------------------------------------------------------*/
108 	if (ehci->async)  in ehci_mem_cleanup()
109 		qh_destroy(ehci, ehci->async);  in ehci_mem_cleanup()
110 	ehci->async = NULL;  in ehci_mem_cleanup()
112 	if (ehci->dummy)  in ehci_mem_cleanup()
113 		qh_destroy(ehci, ehci->dummy);  in ehci_mem_cleanup()
114 	ehci->dummy = NULL;  in ehci_mem_cleanup()
117 	dma_pool_destroy(ehci->qtd_pool);  in ehci_mem_cleanup()
118 	ehci->qtd_pool = NULL;  in ehci_mem_cleanup()
119 	dma_pool_destroy(ehci->qh_pool);  in ehci_mem_cleanup()
120 	ehci->qh_pool = NULL;  in ehci_mem_cleanup()
121 	dma_pool_destroy(ehci->itd_pool);  in ehci_mem_cleanup()
122 	ehci->itd_pool = NULL;  in ehci_mem_cleanup()
123 	dma_pool_destroy(ehci->sitd_pool);  in ehci_mem_cleanup()
124 	ehci->sitd_pool = NULL;  in ehci_mem_cleanup()
126 	if (ehci->periodic)  in ehci_mem_cleanup()
127 		dma_free_coherent(ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_cleanup()
128 			ehci->periodic_size * sizeof (u32),  in ehci_mem_cleanup()
129 			ehci->periodic, ehci->periodic_dma);  in ehci_mem_cleanup()
130 	ehci->periodic = NULL;  in ehci_mem_cleanup()
133 	kfree(ehci->pshadow);  in ehci_mem_cleanup()
134 	ehci->pshadow = NULL;  in ehci_mem_cleanup()
143 	ehci->qtd_pool = dma_pool_create ("ehci_qtd",  in ehci_mem_init()
144 			ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_init()
148 	if (!ehci->qtd_pool) {  in ehci_mem_init()
153 	ehci->qh_pool = dma_pool_create ("ehci_qh",  in ehci_mem_init()
154 			ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_init()
158 	if (!ehci->qh_pool) {  in ehci_mem_init()
161 	ehci->async = ehci_qh_alloc (ehci, flags);  in ehci_mem_init()
162 	if (!ehci->async) {  in ehci_mem_init()
167 	ehci->itd_pool = dma_pool_create ("ehci_itd",  in ehci_mem_init()
168 			ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_init()
172 	if (!ehci->itd_pool) {  in ehci_mem_init()
177 	ehci->sitd_pool = dma_pool_create ("ehci_sitd",  in ehci_mem_init()
178 			ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_init()
182 	if (!ehci->sitd_pool) {  in ehci_mem_init()
187 	ehci->periodic = (__le32 *)  in ehci_mem_init()
188 		dma_alloc_coherent(ehci_to_hcd(ehci)->self.sysdev,  in ehci_mem_init()
189 			ehci->periodic_size * sizeof(__le32),  in ehci_mem_init()
190 			&ehci->periodic_dma, flags);  in ehci_mem_init()
191 	if (ehci->periodic == NULL) {  in ehci_mem_init()
195 	if (ehci->use_dummy_qh) {  in ehci_mem_init()
197 		ehci->dummy = ehci_qh_alloc(ehci, flags);  in ehci_mem_init()
198 		if (!ehci->dummy)  in ehci_mem_init()
201 		hw = ehci->dummy->hw;  in ehci_mem_init()
202 		hw->hw_next = EHCI_LIST_END(ehci);  in ehci_mem_init()
203 		hw->hw_qtd_next = EHCI_LIST_END(ehci);  in ehci_mem_init()
204 		hw->hw_alt_next = EHCI_LIST_END(ehci);  in ehci_mem_init()
205 		ehci->dummy->hw = hw;  in ehci_mem_init()
207 		for (i = 0; i < ehci->periodic_size; i++)  in ehci_mem_init()
208 			ehci->periodic[i] = cpu_to_hc32(ehci,  in ehci_mem_init()
209 					ehci->dummy->qh_dma);  in ehci_mem_init()
211 		for (i = 0; i < ehci->periodic_size; i++)  in ehci_mem_init()
212 			ehci->periodic[i] = EHCI_LIST_END(ehci);  in ehci_mem_init()
216 	ehci->pshadow = kcalloc(ehci->periodic_size, sizeof(void *), flags);  in ehci_mem_init()
217 	if (ehci->pshadow != NULL)  in ehci_mem_init()
223 	return -ENOMEM;  in ehci_mem_init()