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>
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);
+}