cavium/zip/zip_device.c

50  * zip_cmd_queue_consumed - Calculates the space consumed in the command queue.
53  * @queue:   Queue number
55  * Return: Bytes consumed in the command queue buffer.
57 static inline u32 zip_cmd_queue_consumed(struct zip_device *zip_dev, int queue)
59 	return ((zip_dev->iq[queue].sw_head - zip_dev->iq[queue].sw_tail) *
64  * zip_load_instr - Submits the instruction into the ZIP command queue
69  * This function copies the ZIP instruction to the command queue and rings the
71  * queue is maintained in a circular fashion. When there is space for exactly
72  * one instruction in the queue, next chunk pointer of the queue is made to
73  * point to the head of the queue, thus maintaining a circular queue.
81 	u32 queue = 0;
91 		queue = 0;
93 		queue = 1;
95 	zip_dbg("CPU Core: %d Queue number:%d", raw_smp_processor_id(), queue);
98 	spin_lock(&zip_dev->iq[queue].lock);
109 	zip_dbg("sw_head : %lx", zip_dev->iq[queue].sw_head);
110 	zip_dbg("sw_tail : %lx", zip_dev->iq[queue].sw_tail);
112 	consumed = zip_cmd_queue_consumed(zip_dev, queue);
115 		zip_dbg("Cmd queue space available for single command");
116 		/* Space for one cmd, pust it and make it circular queue */
117 		memcpy((u8 *)zip_dev->iq[queue].sw_head, (u8 *)instr,
119 		zip_dev->iq[queue].sw_head += 16; /* 16 64_bit words = 128B */
122 		ncb_ptr = zip_dev->iq[queue].sw_head;
125 			ncb_ptr, zip_dev->iq[queue].sw_head - 16);
127 		/* Using Circular command queue */
128 		zip_dev->iq[queue].sw_head = zip_dev->iq[queue].sw_tail;
130 		zip_dev->iq[queue].free_flag = 1;
134 		ncp.s.addr = __pa(zip_dev->iq[queue].sw_head);
137 			*ncb_ptr, __pa(zip_dev->iq[queue].sw_head));
139 		zip_dev->iq[queue].pend_cnt++;
143 		/* Push this cmd to cmd queue buffer */
144 		memcpy((u8 *)zip_dev->iq[queue].sw_head, (u8 *)instr,
146 		zip_dev->iq[queue].sw_head += 16; /* 16 64_bit words = 128B */
148 		zip_dev->iq[queue].pend_cnt++;
151 		zip_dev->iq[queue].sw_head, zip_dev->iq[queue].sw_tail,
152 		zip_dev->iq[queue].hw_tail);
155 		zip_dev->iq[queue].pend_cnt);
161 		      (zip_dev->reg_base + ZIP_QUEX_DOORBELL(queue)));
164 	spin_unlock(&zip_dev->iq[queue].lock);
166 	return queue;
170  * zip_update_cmd_bufs - Updates the queue statistics after posting the
173  * @queue:   Queue number
175 void zip_update_cmd_bufs(struct zip_device *zip_dev, u32 queue)
178 	spin_lock(&zip_dev->iq[queue].lock);
181 	if (zip_dev->iq[queue].free_flag == 1) {
184 		zip_dev->iq[queue].free_flag = 0;
187 		zip_dev->iq[queue].hw_tail = zip_dev->iq[queue].sw_head;
190 		zip_dev->iq[queue].hw_tail += 16; /* 16 64_bit words = 128B */
193 	zip_dev->iq[queue].done_cnt++;
194 	zip_dev->iq[queue].pend_cnt--;
197 		zip_dev->iq[queue].sw_head, zip_dev->iq[queue].sw_tail,
198 		zip_dev->iq[queue].hw_tail);
199 	zip_dbg(" Got CC : pend_cnt : %d\n", zip_dev->iq[queue].pend_cnt);
201 	spin_unlock(&zip_dev->iq[queue].lock);