dma: keystone_nav: generalize driver usage

The keystone_nav driver is general driver intended to be used for
working with queue manager and pktdma for different IPs like NETCP,
AIF, FFTC, etc. So the it's API shouldn't be named like it works only
with one of them, it should be general names. The names with prefix
like netcp_* rather do for drivers/net/keystone_net.c driver. So it's
good to generalize this driver to be used for different IP's and
delete confusion with real NETCP driver.

The current netcp_* functions of keystone navigator can be used for
other settings of pktdma, not only for NETCP. The API of this driver
is used by the keystone_net driver to work with NETCP, so net driver
also should be corrected. For convenience collect pkdma
configurations in drivers/dma/keystone_nav_cfg.c.

Acked-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

3 files changed, 83 insertions, 78 deletions

diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 519dd0d..15b0780 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -8,4 +8,4 @@
 obj-$(CONFIG_FSLDMAFEC) += MCD_tasksInit.o MCD_dmaApi.o MCD_tasks.o
 obj-$(CONFIG_APBH_DMA) += apbh_dma.o
 obj-$(CONFIG_FSL_DMA) += fsl_dma.o
-obj-$(CONFIG_TI_KSNAV) += keystone_nav.o
+obj-$(CONFIG_TI_KSNAV) += keystone_nav.o keystone_nav_cfg.o
diff --git a/drivers/dma/keystone_nav.c b/drivers/dma/keystone_nav.c
index d960fbb..77707c2 100644
--- a/drivers/dma/keystone_nav.c
+++ b/drivers/dma/keystone_nav.c
@@ -156,35 +156,20 @@ void queue_close(u32 qnum)
 /**
  * DMA API
  */
-struct pktdma_cfg netcp_pktdma = {
-	.global		= (void *)CONFIG_KSNAV_NETCP_PDMA_CTRL_BASE,
-	.tx_ch		= (void *)CONFIG_KSNAV_NETCP_PDMA_TX_BASE,
-	.tx_ch_num	= CONFIG_KSNAV_NETCP_PDMA_TX_CH_NUM,
-	.rx_ch		= (void *)CONFIG_KSNAV_NETCP_PDMA_RX_BASE,
-	.rx_ch_num	= CONFIG_KSNAV_NETCP_PDMA_RX_CH_NUM,
-	.tx_sched	= (u32 *)CONFIG_KSNAV_NETCP_PDMA_SCHED_BASE,
-	.rx_flows	= (void *)CONFIG_KSNAV_NETCP_PDMA_RX_FLOW_BASE,
-	.rx_flow_num	= CONFIG_KSNAV_NETCP_PDMA_RX_FLOW_NUM,
-	.rx_free_q	= CONFIG_KSNAV_NETCP_PDMA_RX_FREE_QUEUE,
-	.rx_rcv_q	= CONFIG_KSNAV_NETCP_PDMA_RX_RCV_QUEUE,
-	.tx_snd_q	= CONFIG_KSNAV_NETCP_PDMA_TX_SND_QUEUE,
-};
-
-struct pktdma_cfg *netcp;
 
-static int netcp_rx_disable(void)
+static int ksnav_rx_disable(struct pktdma_cfg *pktdma)
 {
 	u32 j, v, k;
 
-	for (j = 0; j < netcp->rx_ch_num; j++) {
-		v = readl(&netcp->rx_ch[j].cfg_a);
+	for (j = 0; j < pktdma->rx_ch_num; j++) {
+		v = readl(&pktdma->rx_ch[j].cfg_a);
 		if (!(v & CPDMA_CHAN_A_ENABLE))
 			continue;
 
-		writel(v | CPDMA_CHAN_A_TDOWN, &netcp->rx_ch[j].cfg_a);
+		writel(v | CPDMA_CHAN_A_TDOWN, &pktdma->rx_ch[j].cfg_a);
 		for (k = 0; k < TDOWN_TIMEOUT_COUNT; k++) {
 			udelay(100);
-			v = readl(&netcp->rx_ch[j].cfg_a);
+			v = readl(&pktdma->rx_ch[j].cfg_a);
 			if (!(v & CPDMA_CHAN_A_ENABLE))
 				continue;
 		}
@@ -192,33 +177,33 @@ static int netcp_rx_disable(void)
 	}
 
 	/* Clear all of the flow registers */
-	for (j = 0; j < netcp->rx_flow_num; j++) {
-		writel(0, &netcp->rx_flows[j].control);
-		writel(0, &netcp->rx_flows[j].tags);
-		writel(0, &netcp->rx_flows[j].tag_sel);
-		writel(0, &netcp->rx_flows[j].fdq_sel[0]);
-		writel(0, &netcp->rx_flows[j].fdq_sel[1]);
-		writel(0, &netcp->rx_flows[j].thresh[0]);
-		writel(0, &netcp->rx_flows[j].thresh[1]);
-		writel(0, &netcp->rx_flows[j].thresh[2]);
+	for (j = 0; j < pktdma->rx_flow_num; j++) {
+		writel(0, &pktdma->rx_flows[j].control);
+		writel(0, &pktdma->rx_flows[j].tags);
+		writel(0, &pktdma->rx_flows[j].tag_sel);
+		writel(0, &pktdma->rx_flows[j].fdq_sel[0]);
+		writel(0, &pktdma->rx_flows[j].fdq_sel[1]);
+		writel(0, &pktdma->rx_flows[j].thresh[0]);
+		writel(0, &pktdma->rx_flows[j].thresh[1]);
+		writel(0, &pktdma->rx_flows[j].thresh[2]);
 	}
 
 	return QM_OK;
 }
 
-static int netcp_tx_disable(void)
+static int ksnav_tx_disable(struct pktdma_cfg *pktdma)
 {
 	u32 j, v, k;
 
-	for (j = 0; j < netcp->tx_ch_num; j++) {
-		v = readl(&netcp->tx_ch[j].cfg_a);
+	for (j = 0; j < pktdma->tx_ch_num; j++) {
+		v = readl(&pktdma->tx_ch[j].cfg_a);
 		if (!(v & CPDMA_CHAN_A_ENABLE))
 			continue;
 
-		writel(v | CPDMA_CHAN_A_TDOWN, &netcp->tx_ch[j].cfg_a);
+		writel(v | CPDMA_CHAN_A_TDOWN, &pktdma->tx_ch[j].cfg_a);
 		for (k = 0; k < TDOWN_TIMEOUT_COUNT; k++) {
 			udelay(100);
-			v = readl(&netcp->tx_ch[j].cfg_a);
+			v = readl(&pktdma->tx_ch[j].cfg_a);
 			if (!(v & CPDMA_CHAN_A_ENABLE))
 				continue;
 		}
@@ -228,19 +213,17 @@ static int netcp_tx_disable(void)
 	return QM_OK;
 }
 
-static int _netcp_init(struct pktdma_cfg *netcp_cfg,
-		       struct rx_buff_desc *rx_buffers)
+int ksnav_init(struct pktdma_cfg *pktdma, struct rx_buff_desc *rx_buffers)
 {
 	u32 j, v;
 	struct qm_host_desc *hd;
 	u8 *rx_ptr;
 
-	if (netcp_cfg == NULL || rx_buffers == NULL ||
+	if (pktdma == NULL || rx_buffers == NULL ||
 	    rx_buffers->buff_ptr == NULL || qm_cfg == NULL)
 		return QM_ERR;
 
-	netcp = netcp_cfg;
-	netcp->rx_flow = rx_buffers->rx_flow;
+	pktdma->rx_flow = rx_buffers->rx_flow;
 
 	/* init rx queue */
 	rx_ptr = rx_buffers->buff_ptr;
@@ -250,69 +233,64 @@ static int _netcp_init(struct pktdma_cfg *netcp_cfg,
 		if (hd == NULL)
 			return QM_ERR;
 
-		qm_buff_push(hd, netcp->rx_free_q,
+		qm_buff_push(hd, pktdma->rx_free_q,
 			     rx_ptr, rx_buffers->buff_len);
 
 		rx_ptr += rx_buffers->buff_len;
 	}
 
-	netcp_rx_disable();
+	ksnav_rx_disable(pktdma);
 
 	/* configure rx channels */
-	v = CPDMA_REG_VAL_MAKE_RX_FLOW_A(1, 1, 0, 0, 0, 0, 0, netcp->rx_rcv_q);
-	writel(v, &netcp->rx_flows[netcp->rx_flow].control);
-	writel(0, &netcp->rx_flows[netcp->rx_flow].tags);
-	writel(0, &netcp->rx_flows[netcp->rx_flow].tag_sel);
+	v = CPDMA_REG_VAL_MAKE_RX_FLOW_A(1, 1, 0, 0, 0, 0, 0, pktdma->rx_rcv_q);
+	writel(v, &pktdma->rx_flows[pktdma->rx_flow].control);
+	writel(0, &pktdma->rx_flows[pktdma->rx_flow].tags);
+	writel(0, &pktdma->rx_flows[pktdma->rx_flow].tag_sel);
 
-	v = CPDMA_REG_VAL_MAKE_RX_FLOW_D(0, netcp->rx_free_q, 0,
-					 netcp->rx_free_q);
+	v = CPDMA_REG_VAL_MAKE_RX_FLOW_D(0, pktdma->rx_free_q, 0,
+					 pktdma->rx_free_q);
 
-	writel(v, &netcp->rx_flows[netcp->rx_flow].fdq_sel[0]);
-	writel(v, &netcp->rx_flows[netcp->rx_flow].fdq_sel[1]);
-	writel(0, &netcp->rx_flows[netcp->rx_flow].thresh[0]);
-	writel(0, &netcp->rx_flows[netcp->rx_flow].thresh[1]);
-	writel(0, &netcp->rx_flows[netcp->rx_flow].thresh[2]);
+	writel(v, &pktdma->rx_flows[pktdma->rx_flow].fdq_sel[0]);
+	writel(v, &pktdma->rx_flows[pktdma->rx_flow].fdq_sel[1]);
+	writel(0, &pktdma->rx_flows[pktdma->rx_flow].thresh[0]);
+	writel(0, &pktdma->rx_flows[pktdma->rx_flow].thresh[1]);
+	writel(0, &pktdma->rx_flows[pktdma->rx_flow].thresh[2]);
 
-	for (j = 0; j < netcp->rx_ch_num; j++)
-		writel(CPDMA_CHAN_A_ENABLE, &netcp->rx_ch[j].cfg_a);
+	for (j = 0; j < pktdma->rx_ch_num; j++)
+		writel(CPDMA_CHAN_A_ENABLE, &pktdma->rx_ch[j].cfg_a);
 
 	/* configure tx channels */
 	/* Disable loopback in the tx direction */
-	writel(0, &netcp->global->emulation_control);
+	writel(0, &pktdma->global->emulation_control);
 
 	/* Set QM base address, only for K2x devices */
-	writel(CONFIG_KSNAV_QM_BASE_ADDRESS, &netcp->global->qm_base_addr[0]);
+	writel(CONFIG_KSNAV_QM_BASE_ADDRESS, &pktdma->global->qm_base_addr[0]);
 
 	/* Enable all channels. The current state isn't important */
-	for (j = 0; j < netcp->tx_ch_num; j++)  {
-		writel(0, &netcp->tx_ch[j].cfg_b);
-		writel(CPDMA_CHAN_A_ENABLE, &netcp->tx_ch[j].cfg_a);
+	for (j = 0; j < pktdma->tx_ch_num; j++)  {
+		writel(0, &pktdma->tx_ch[j].cfg_b);
+		writel(CPDMA_CHAN_A_ENABLE, &pktdma->tx_ch[j].cfg_a);
 	}
 
 	return QM_OK;
 }
 
-int netcp_init(struct rx_buff_desc *rx_buffers)
-{
-	return _netcp_init(&netcp_pktdma, rx_buffers);
-}
-
-int netcp_close(void)
+int ksnav_close(struct pktdma_cfg *pktdma)
 {
-	if (!netcp)
+	if (!pktdma)
 		return QM_ERR;
 
-	netcp_tx_disable();
-	netcp_rx_disable();
+	ksnav_tx_disable(pktdma);
+	ksnav_rx_disable(pktdma);
 
-	queue_close(netcp->rx_free_q);
-	queue_close(netcp->rx_rcv_q);
-	queue_close(netcp->tx_snd_q);
+	queue_close(pktdma->rx_free_q);
+	queue_close(pktdma->rx_rcv_q);
+	queue_close(pktdma->tx_snd_q);
 
 	return QM_OK;
 }
 
-int netcp_send(u32 *pkt, int num_bytes, u32 swinfo2)
+int ksnav_send(struct pktdma_cfg *pktdma, u32 *pkt, int num_bytes, u32 swinfo2)
 {
 	struct qm_host_desc *hd;
 
@@ -324,16 +302,16 @@ int netcp_send(u32 *pkt, int num_bytes, u32 swinfo2)
 	hd->swinfo[2]	= swinfo2;
 	hd->packet_info = qm_cfg->qpool_num;
 
-	qm_buff_push(hd, netcp->tx_snd_q, pkt, num_bytes);
+	qm_buff_push(hd, pktdma->tx_snd_q, pkt, num_bytes);
 
 	return QM_OK;
 }
 
-void *netcp_recv(u32 **pkt, int *num_bytes)
+void *ksnav_recv(struct pktdma_cfg *pktdma, u32 **pkt, int *num_bytes)
 {
 	struct qm_host_desc *hd;
 
-	hd = qm_pop(netcp->rx_rcv_q);
+	hd = qm_pop(pktdma->rx_rcv_q);
 	if (!hd)
 		return NULL;
 
@@ -343,12 +321,12 @@ void *netcp_recv(u32 **pkt, int *num_bytes)
 	return hd;
 }
 
-void netcp_release_rxhd(void *hd)
+void ksnav_release_rxhd(struct pktdma_cfg *pktdma, void *hd)
 {
 	struct qm_host_desc *_hd = (struct qm_host_desc *)hd;
 
 	_hd->buff_len = _hd->orig_buff_len;
 	_hd->buff_ptr = _hd->orig_buff_ptr;
 
-	qm_push(_hd, netcp->rx_free_q);
+	qm_push(_hd, pktdma->rx_free_q);
 }
diff --git a/drivers/dma/keystone_nav_cfg.c b/drivers/dma/keystone_nav_cfg.c
new file mode 100644
index 0000000..bdd30a0
--- /dev/null
+++ b/drivers/dma/keystone_nav_cfg.c
@@ -0,0 +1,27 @@
+/*
+ * Multicore Navigator driver for TI Keystone 2 devices.
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <asm/ti-common/keystone_nav.h>
+
+#ifdef CONFIG_KSNAV_PKTDMA_NETCP
+/* NETCP Pktdma */
+struct pktdma_cfg netcp_pktdma = {
+	.global		= (void *)CONFIG_KSNAV_NETCP_PDMA_CTRL_BASE,
+	.tx_ch		= (void *)CONFIG_KSNAV_NETCP_PDMA_TX_BASE,
+	.tx_ch_num	= CONFIG_KSNAV_NETCP_PDMA_TX_CH_NUM,
+	.rx_ch		= (void *)CONFIG_KSNAV_NETCP_PDMA_RX_BASE,
+	.rx_ch_num	= CONFIG_KSNAV_NETCP_PDMA_RX_CH_NUM,
+	.tx_sched	= (u32 *)CONFIG_KSNAV_NETCP_PDMA_SCHED_BASE,
+	.rx_flows	= (void *)CONFIG_KSNAV_NETCP_PDMA_RX_FLOW_BASE,
+	.rx_flow_num	= CONFIG_KSNAV_NETCP_PDMA_RX_FLOW_NUM,
+	.rx_free_q	= CONFIG_KSNAV_NETCP_PDMA_RX_FREE_QUEUE,
+	.rx_rcv_q	= CONFIG_KSNAV_NETCP_PDMA_RX_RCV_QUEUE,
+	.tx_snd_q	= CONFIG_KSNAV_NETCP_PDMA_TX_SND_QUEUE,
+};
+#endif