keystone2: add keystone multicore navigator driver

Multicore navigator consists of Network Coprocessor (NetCP) and
Queue Manager sub system. More details on the hardware can
be obtained from the following links:-

Network Coprocessor: http://www.ti.com/lit/pdf/sprugz6
Multicore Navigator: http://www.ti.com/lit/pdf/sprugr9

Multicore navigator driver implements APIs to configure
the Queue Manager and NetCP Pkt DMA.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Acked-by: Tom Rini <trini@ti.com>

2 files changed, 377 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/keystone/Makefile b/arch/arm/cpu/armv7/keystone/Makefile
index 05b3852..b1bd022 100644
--- a/arch/arm/cpu/armv7/keystone/Makefile
+++ b/arch/arm/cpu/armv7/keystone/Makefile
@@ -11,6 +11,7 @@ obj-y	+= psc.o
 obj-y	+= clock.o
 obj-y	+= cmd_clock.o
 obj-y	+= cmd_mon.o
+obj-y	+= keystone_nav.o
 obj-y	+= msmc.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
 obj-y	+= ddr3.o
diff --git a/arch/arm/cpu/armv7/keystone/keystone_nav.c b/arch/arm/cpu/armv7/keystone/keystone_nav.c
new file mode 100644
index 0000000..39d6f99
--- /dev/null
+++ b/arch/arm/cpu/armv7/keystone/keystone_nav.c
@@ -0,0 +1,376 @@
+/*
+ * 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 <common.h>
+#include <asm/io.h>
+#include <asm/arch/keystone_nav.h>
+
+static int soc_type =
+#ifdef CONFIG_SOC_K2HK
+	k2hk;
+#endif
+
+struct qm_config k2hk_qm_memmap = {
+	.stat_cfg	= 0x02a40000,
+	.queue		= (struct qm_reg_queue *)0x02a80000,
+	.mngr_vbusm	= 0x23a80000,
+	.i_lram		= 0x00100000,
+	.proxy		= (struct qm_reg_queue *)0x02ac0000,
+	.status_ram	= 0x02a06000,
+	.mngr_cfg	= (struct qm_cfg_reg *)0x02a02000,
+	.intd_cfg	= 0x02a0c000,
+	.desc_mem	= (struct descr_mem_setup_reg *)0x02a03000,
+	.region_num	= 64,
+	.pdsp_cmd	= 0x02a20000,
+	.pdsp_ctl	= 0x02a0f000,
+	.pdsp_iram	= 0x02a10000,
+	.qpool_num	= 4000,
+};
+
+/*
+ * We are going to use only one type of descriptors - host packet
+ * descriptors. We staticaly allocate memory for them here
+ */
+struct qm_host_desc desc_pool[HDESC_NUM] __aligned(sizeof(struct qm_host_desc));
+
+static struct qm_config *qm_cfg;
+
+inline int num_of_desc_to_reg(int num_descr)
+{
+	int j, num;
+
+	for (j = 0, num = 32; j < 15; j++, num *= 2) {
+		if (num_descr <= num)
+			return j;
+	}
+
+	return 15;
+}
+
+static int _qm_init(struct qm_config *cfg)
+{
+	u32	j;
+
+	if (cfg == NULL)
+		return QM_ERR;
+
+	qm_cfg = cfg;
+
+	qm_cfg->mngr_cfg->link_ram_base0	= qm_cfg->i_lram;
+	qm_cfg->mngr_cfg->link_ram_size0	= HDESC_NUM * 8;
+	qm_cfg->mngr_cfg->link_ram_base1	= 0;
+	qm_cfg->mngr_cfg->link_ram_size1	= 0;
+	qm_cfg->mngr_cfg->link_ram_base2	= 0;
+
+	qm_cfg->desc_mem[0].base_addr = (u32)desc_pool;
+	qm_cfg->desc_mem[0].start_idx = 0;
+	qm_cfg->desc_mem[0].desc_reg_size =
+		(((sizeof(struct qm_host_desc) >> 4) - 1) << 16) |
+		num_of_desc_to_reg(HDESC_NUM);
+
+	memset(desc_pool, 0, sizeof(desc_pool));
+	for (j = 0; j < HDESC_NUM; j++)
+		qm_push(&desc_pool[j], qm_cfg->qpool_num);
+
+	return QM_OK;
+}
+
+int qm_init(void)
+{
+	switch (soc_type) {
+	case k2hk:
+		return _qm_init(&k2hk_qm_memmap);
+	}
+
+	return QM_ERR;
+}
+
+void qm_close(void)
+{
+	u32	j;
+
+	if (qm_cfg == NULL)
+		return;
+
+	queue_close(qm_cfg->qpool_num);
+
+	qm_cfg->mngr_cfg->link_ram_base0	= 0;
+	qm_cfg->mngr_cfg->link_ram_size0	= 0;
+	qm_cfg->mngr_cfg->link_ram_base1	= 0;
+	qm_cfg->mngr_cfg->link_ram_size1	= 0;
+	qm_cfg->mngr_cfg->link_ram_base2	= 0;
+
+	for (j = 0; j < qm_cfg->region_num; j++) {
+		qm_cfg->desc_mem[j].base_addr = 0;
+		qm_cfg->desc_mem[j].start_idx = 0;
+		qm_cfg->desc_mem[j].desc_reg_size = 0;
+	}
+
+	qm_cfg = NULL;
+}
+
+void qm_push(struct qm_host_desc *hd, u32 qnum)
+{
+	u32 regd;
+
+	if (!qm_cfg)
+		return;
+
+	cpu_to_bus((u32 *)hd, sizeof(struct qm_host_desc)/4);
+	regd = (u32)hd | ((sizeof(struct qm_host_desc) >> 4) - 1);
+	writel(regd, &qm_cfg->queue[qnum].ptr_size_thresh);
+}
+
+void qm_buff_push(struct qm_host_desc *hd, u32 qnum,
+		    void *buff_ptr, u32 buff_len)
+{
+	hd->orig_buff_len = buff_len;
+	hd->buff_len = buff_len;
+	hd->orig_buff_ptr = (u32)buff_ptr;
+	hd->buff_ptr = (u32)buff_ptr;
+	qm_push(hd, qnum);
+}
+
+struct qm_host_desc *qm_pop(u32 qnum)
+{
+	u32 uhd;
+
+	if (!qm_cfg)
+		return NULL;
+
+	uhd = readl(&qm_cfg->queue[qnum].ptr_size_thresh) & ~0xf;
+	if (uhd)
+		cpu_to_bus((u32 *)uhd, sizeof(struct qm_host_desc)/4);
+
+	return (struct qm_host_desc *)uhd;
+}
+
+struct qm_host_desc *qm_pop_from_free_pool(void)
+{
+	if (!qm_cfg)
+		return NULL;
+
+	return qm_pop(qm_cfg->qpool_num);
+}
+
+void queue_close(u32 qnum)
+{
+	struct qm_host_desc *hd;
+
+	while ((hd = qm_pop(qnum)))
+		;
+}
+
+/*
+ * DMA API
+ */
+
+struct pktdma_cfg k2hk_netcp_pktdma = {
+	.global		= (struct global_ctl_regs *)0x02004000,
+	.tx_ch		= (struct tx_chan_regs *)0x02004400,
+	.tx_ch_num	= 9,
+	.rx_ch		= (struct rx_chan_regs *)0x02004800,
+	.rx_ch_num	= 26,
+	.tx_sched	= (u32 *)0x02004c00,
+	.rx_flows	= (struct rx_flow_regs *)0x02005000,
+	.rx_flow_num	= 32,
+	.rx_free_q	= 4001,
+	.rx_rcv_q	= 4002,
+	.tx_snd_q	= 648,
+};
+
+struct pktdma_cfg *netcp;
+
+static int netcp_rx_disable(void)
+{
+	u32 j, v, k;
+
+	for (j = 0; j < netcp->rx_ch_num; j++) {
+		v = readl(&netcp->rx_ch[j].cfg_a);
+		if (!(v & CPDMA_CHAN_A_ENABLE))
+			continue;
+
+		writel(v | CPDMA_CHAN_A_TDOWN, &netcp->rx_ch[j].cfg_a);
+		for (k = 0; k < TDOWN_TIMEOUT_COUNT; k++) {
+			udelay(100);
+			v = readl(&netcp->rx_ch[j].cfg_a);
+			if (!(v & CPDMA_CHAN_A_ENABLE))
+				continue;
+		}
+		/* TODO: teardown error on if TDOWN_TIMEOUT_COUNT is reached */
+	}
+
+	/* 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]);
+	}
+
+	return QM_OK;
+}
+
+static int netcp_tx_disable(void)
+{
+	u32 j, v, k;
+
+	for (j = 0; j < netcp->tx_ch_num; j++) {
+		v = readl(&netcp->tx_ch[j].cfg_a);
+		if (!(v & CPDMA_CHAN_A_ENABLE))
+			continue;
+
+		writel(v | CPDMA_CHAN_A_TDOWN, &netcp->tx_ch[j].cfg_a);
+		for (k = 0; k < TDOWN_TIMEOUT_COUNT; k++) {
+			udelay(100);
+			v = readl(&netcp->tx_ch[j].cfg_a);
+			if (!(v & CPDMA_CHAN_A_ENABLE))
+				continue;
+		}
+		/* TODO: teardown error on if TDOWN_TIMEOUT_COUNT is reached */
+	}
+
+	return QM_OK;
+}
+
+static int _netcp_init(struct pktdma_cfg *netcp_cfg,
+		       struct rx_buff_desc *rx_buffers)
+{
+	u32 j, v;
+	struct qm_host_desc *hd;
+	u8 *rx_ptr;
+
+	if (netcp_cfg == 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;
+
+	/* init rx queue */
+	rx_ptr = rx_buffers->buff_ptr;
+
+	for (j = 0; j < rx_buffers->num_buffs; j++) {
+		hd = qm_pop(qm_cfg->qpool_num);
+		if (hd == NULL)
+			return QM_ERR;
+
+		qm_buff_push(hd, netcp->rx_free_q,
+			     rx_ptr, rx_buffers->buff_len);
+
+		rx_ptr += rx_buffers->buff_len;
+	}
+
+	netcp_rx_disable();
+
+	/* 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_D(0, netcp->rx_free_q, 0,
+					 netcp->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]);
+
+	for (j = 0; j < netcp->rx_ch_num; j++)
+		writel(CPDMA_CHAN_A_ENABLE, &netcp->rx_ch[j].cfg_a);
+
+	/* configure tx channels */
+	/* Disable loopback in the tx direction */
+	writel(0, &netcp->global->emulation_control);
+
+/* TODO: make it dependend on a soc type variable */
+#ifdef CONFIG_SOC_K2HK
+	/* Set QM base address, only for K2x devices */
+	writel(0x23a80000, &netcp->global->qm_base_addr[0]);
+#endif
+
+	/* 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);
+	}
+
+	return QM_OK;
+}
+
+int netcp_init(struct rx_buff_desc *rx_buffers)
+{
+	switch (soc_type) {
+	case k2hk:
+		_netcp_init(&k2hk_netcp_pktdma, rx_buffers);
+		return QM_OK;
+	}
+	return QM_ERR;
+}
+
+int netcp_close(void)
+{
+	if (!netcp)
+		return QM_ERR;
+
+	netcp_tx_disable();
+	netcp_rx_disable();
+
+	queue_close(netcp->rx_free_q);
+	queue_close(netcp->rx_rcv_q);
+	queue_close(netcp->tx_snd_q);
+
+	return QM_OK;
+}
+
+int netcp_send(u32 *pkt, int num_bytes, u32 swinfo2)
+{
+	struct qm_host_desc *hd;
+
+	hd = qm_pop(qm_cfg->qpool_num);
+	if (hd == NULL)
+		return QM_ERR;
+
+	hd->desc_info	= num_bytes;
+	hd->swinfo[2]	= swinfo2;
+	hd->packet_info = qm_cfg->qpool_num;
+
+	qm_buff_push(hd, netcp->tx_snd_q, pkt, num_bytes);
+
+	return QM_OK;
+}
+
+void *netcp_recv(u32 **pkt, int *num_bytes)
+{
+	struct qm_host_desc *hd;
+
+	hd = qm_pop(netcp->rx_rcv_q);
+	if (!hd)
+		return NULL;
+
+	*pkt = (u32 *)hd->buff_ptr;
+	*num_bytes = hd->desc_info & 0x3fffff;
+
+	return hd;
+}
+
+void netcp_release_rxhd(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);
+}