88 static void shmem_tx_prepare(struct scmi_shared_mem __iomem *shmem,  in shmem_tx_prepare()  argument
110 	spin_until_cond((ioread32(&shmem->channel_status) &  in shmem_tx_prepare()
113 	if (!(ioread32(&shmem->channel_status) &  in shmem_tx_prepare()
122 	iowrite32(0x0, &shmem->channel_status);  in shmem_tx_prepare()
124 		  &shmem->flags);  in shmem_tx_prepare()
125 	iowrite32(sizeof(shmem->msg_header) + xfer->tx.len, &shmem->length);  in shmem_tx_prepare()
126 	iowrite32(pack_scmi_header(&xfer->hdr), &shmem->msg_header);  in shmem_tx_prepare()
128 		copy_toio(shmem->msg_payload, xfer->tx.buf, xfer->tx.len);  in shmem_tx_prepare()
131 static u32 shmem_read_header(struct scmi_shared_mem __iomem *shmem)  in shmem_read_header()  argument
133 	return ioread32(&shmem->msg_header);  in shmem_read_header()
136 static void shmem_fetch_response(struct scmi_shared_mem __iomem *shmem,  in shmem_fetch_response()  argument
140 	size_t len = ioread32(&shmem->length);  in shmem_fetch_response()
142 	xfer->hdr.status = ioread32(shmem->msg_payload);  in shmem_fetch_response()
143 	/* Skip the length of header and status in shmem area i.e 8 bytes */  in shmem_fetch_response()
147 	copy_fromio(xfer->rx.buf, shmem->msg_payload + 4, xfer->rx.len);  in shmem_fetch_response()
150 static void shmem_fetch_notification(struct scmi_shared_mem __iomem *shmem,  in shmem_fetch_notification()  argument
154 	size_t len = ioread32(&shmem->length);  in shmem_fetch_notification()
156 	/* Skip only the length of header in shmem area i.e 4 bytes */  in shmem_fetch_notification()
160 	copy_fromio(xfer->rx.buf, shmem->msg_payload, xfer->rx.len);  in shmem_fetch_notification()
163 static void shmem_clear_channel(struct scmi_shared_mem __iomem *shmem)  in shmem_clear_channel()  argument
165 	iowrite32(SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE, &shmem->channel_status);  in shmem_clear_channel()
168 static bool shmem_poll_done(struct scmi_shared_mem __iomem *shmem,  in shmem_poll_done()  argument
173 	xfer_id = MSG_XTRACT_TOKEN(ioread32(&shmem->msg_header));  in shmem_poll_done()
178 	return ioread32(&shmem->channel_status) &  in shmem_poll_done()
183 static bool shmem_channel_free(struct scmi_shared_mem __iomem *shmem)  in shmem_channel_free()  argument
185 	return (ioread32(&shmem->channel_status) &  in shmem_channel_free()
189 static bool shmem_channel_intr_enabled(struct scmi_shared_mem __iomem *shmem)  in shmem_channel_intr_enabled()  argument
191 	return ioread32(&shmem->flags) & SCMI_SHMEM_FLAG_INTR_ENABLED;  in shmem_channel_intr_enabled()
199 	struct device_node *shmem __free(device_node);  in shmem_setup_iomap()
208 	shmem = of_parse_phandle(cdev->of_node, "shmem", idx);  in shmem_setup_iomap()
209 	if (!shmem)  in shmem_setup_iomap()
212 	if (!of_device_is_compatible(shmem, "arm,scmi-shmem"))  in shmem_setup_iomap()
219 	ret = of_address_to_resource(shmem, 0, res);  in shmem_setup_iomap()
237 	of_property_read_u32(shmem, "reg-io-width", &reg_io_width);  in shmem_setup_iomap()