24 void	ishtp_cl_alloc_dma_buf(struct ishtp_device *dev)  in ishtp_cl_alloc_dma_buf()  argument
28 	if (dev->ishtp_host_dma_tx_buf)  in ishtp_cl_alloc_dma_buf()
31 	dev->ishtp_host_dma_tx_buf_size = 1024*1024;  in ishtp_cl_alloc_dma_buf()
32 	dev->ishtp_host_dma_rx_buf_size = 1024*1024;  in ishtp_cl_alloc_dma_buf()
35 	dev->ishtp_host_dma_tx_buf = dma_alloc_coherent(dev->devc,  in ishtp_cl_alloc_dma_buf()
36 					dev->ishtp_host_dma_tx_buf_size,  in ishtp_cl_alloc_dma_buf()
38 	if (dev->ishtp_host_dma_tx_buf)  in ishtp_cl_alloc_dma_buf()
39 		dev->ishtp_host_dma_tx_buf_phys = h;  in ishtp_cl_alloc_dma_buf()
41 	dev->ishtp_dma_num_slots = dev->ishtp_host_dma_tx_buf_size /  in ishtp_cl_alloc_dma_buf()
44 	dev->ishtp_dma_tx_map = kcalloc(dev->ishtp_dma_num_slots,  in ishtp_cl_alloc_dma_buf()
47 	spin_lock_init(&dev->ishtp_dma_tx_lock);  in ishtp_cl_alloc_dma_buf()
50 	dev->ishtp_host_dma_rx_buf = dma_alloc_coherent(dev->devc,  in ishtp_cl_alloc_dma_buf()
51 					dev->ishtp_host_dma_rx_buf_size,  in ishtp_cl_alloc_dma_buf()
54 	if (dev->ishtp_host_dma_rx_buf)  in ishtp_cl_alloc_dma_buf()
55 		dev->ishtp_host_dma_rx_buf_phys = h;  in ishtp_cl_alloc_dma_buf()
66 void	ishtp_cl_free_dma_buf(struct ishtp_device *dev)  in ishtp_cl_free_dma_buf()  argument
70 	if (dev->ishtp_host_dma_tx_buf) {  in ishtp_cl_free_dma_buf()
71 		h = dev->ishtp_host_dma_tx_buf_phys;  in ishtp_cl_free_dma_buf()
72 		dma_free_coherent(dev->devc, dev->ishtp_host_dma_tx_buf_size,  in ishtp_cl_free_dma_buf()
73 				  dev->ishtp_host_dma_tx_buf, h);  in ishtp_cl_free_dma_buf()
76 	if (dev->ishtp_host_dma_rx_buf) {  in ishtp_cl_free_dma_buf()
77 		h = dev->ishtp_host_dma_rx_buf_phys;  in ishtp_cl_free_dma_buf()
78 		dma_free_coherent(dev->devc, dev->ishtp_host_dma_rx_buf_size,  in ishtp_cl_free_dma_buf()
79 				  dev->ishtp_host_dma_rx_buf, h);  in ishtp_cl_free_dma_buf()
82 	kfree(dev->ishtp_dma_tx_map);  in ishtp_cl_free_dma_buf()
83 	dev->ishtp_host_dma_tx_buf = NULL;  in ishtp_cl_free_dma_buf()
84 	dev->ishtp_host_dma_rx_buf = NULL;  in ishtp_cl_free_dma_buf()
85 	dev->ishtp_dma_tx_map = NULL;  in ishtp_cl_free_dma_buf()
98 void *ishtp_cl_get_dma_send_buf(struct ishtp_device *dev,  in ishtp_cl_get_dma_send_buf()  argument
107 	if (!dev->ishtp_dma_tx_map) {  in ishtp_cl_get_dma_send_buf()
108 		dev_err(dev->devc, "Fail to allocate Tx map\n");  in ishtp_cl_get_dma_send_buf()
112 	spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_get_dma_send_buf()
113 	for (i = 0; i <= (dev->ishtp_dma_num_slots - required_slots); i++) {  in ishtp_cl_get_dma_send_buf()
116 			if (dev->ishtp_dma_tx_map[i+j]) {  in ishtp_cl_get_dma_send_buf()
124 				dev->ishtp_dma_tx_map[i+j] = 1;  in ishtp_cl_get_dma_send_buf()
125 			spin_unlock_irqrestore(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_get_dma_send_buf()
127 				(unsigned char *)dev->ishtp_host_dma_tx_buf;  in ishtp_cl_get_dma_send_buf()
130 	spin_unlock_irqrestore(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_get_dma_send_buf()
131 	dev_err(dev->devc, "No free DMA buffer to send msg\n");  in ishtp_cl_get_dma_send_buf()
144 void ishtp_cl_release_dma_acked_mem(struct ishtp_device *dev,  in ishtp_cl_release_dma_acked_mem()  argument
153 	if ((msg_addr - dev->ishtp_host_dma_tx_buf) % DMA_SLOT_SIZE) {  in ishtp_cl_release_dma_acked_mem()
154 		dev_err(dev->devc, "Bad DMA Tx ack address\n");  in ishtp_cl_release_dma_acked_mem()
158 	if (!dev->ishtp_dma_tx_map) {  in ishtp_cl_release_dma_acked_mem()
159 		dev_err(dev->devc, "Fail to allocate Tx map\n");  in ishtp_cl_release_dma_acked_mem()
163 	i = (msg_addr - dev->ishtp_host_dma_tx_buf) / DMA_SLOT_SIZE;  in ishtp_cl_release_dma_acked_mem()
164 	spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_release_dma_acked_mem()
166 		if ((i + j) >= dev->ishtp_dma_num_slots ||  in ishtp_cl_release_dma_acked_mem()
167 					!dev->ishtp_dma_tx_map[i+j]) {  in ishtp_cl_release_dma_acked_mem()
169 			spin_unlock_irqrestore(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_release_dma_acked_mem()
170 			dev_err(dev->devc, "Bad DMA Tx ack address\n");  in ishtp_cl_release_dma_acked_mem()
173 		dev->ishtp_dma_tx_map[i+j] = 0;  in ishtp_cl_release_dma_acked_mem()
175 	spin_unlock_irqrestore(&dev->ishtp_dma_tx_lock, flags);  in ishtp_cl_release_dma_acked_mem()