--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+#define pr_fmt(fmt) "udma: " fmt
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/bitops.h>
+#include <malloc.h>
+#include <asm/dma-mapping.h>
+#include <dm.h>
+#include <dm/read.h>
+#include <dm/of_access.h>
+#include <dma.h>
+#include <dma-uclass.h>
+#include <linux/delay.h>
+#include <dt-bindings/dma/k3-udma.h>
+#include <linux/soc/ti/k3-navss-ringacc.h>
+#include <linux/soc/ti/cppi5.h>
+#include <linux/soc/ti/ti-udma.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+
+#include "k3-udma-hwdef.h"
+
+#if BITS_PER_LONG == 64
+#define RINGACC_RING_USE_PROXY (0)
+#else
+#define RINGACC_RING_USE_PROXY (1)
+#endif
+
+struct udma_chan;
+
+enum udma_mmr {
+ MMR_GCFG = 0,
+ MMR_RCHANRT,
+ MMR_TCHANRT,
+ MMR_LAST,
+};
+
+static const char * const mmr_names[] = {
+ "gcfg", "rchanrt", "tchanrt"
+};
+
+struct udma_tchan {
+ void __iomem *reg_rt;
+
+ int id;
+ struct k3_nav_ring *t_ring; /* Transmit ring */
+ struct k3_nav_ring *tc_ring; /* Transmit Completion ring */
+};
+
+struct udma_rchan {
+ void __iomem *reg_rt;
+
+ int id;
+ struct k3_nav_ring *fd_ring; /* Free Descriptor ring */
+ struct k3_nav_ring *r_ring; /* Receive ring*/
+};
+
+struct udma_rflow {
+ int id;
+};
+
+struct udma_dev {
+ struct device *dev;
+ void __iomem *mmrs[MMR_LAST];
+
+ struct k3_nav_ringacc *ringacc;
+
+ u32 features;
+
+ int tchan_cnt;
+ int echan_cnt;
+ int rchan_cnt;
+ int rflow_cnt;
+ unsigned long *tchan_map;
+ unsigned long *rchan_map;
+ unsigned long *rflow_map;
+
+ struct udma_tchan *tchans;
+ struct udma_rchan *rchans;
+ struct udma_rflow *rflows;
+
+ struct udma_chan *channels;
+ u32 psil_base;
+
+ u32 ch_count;
+ const struct ti_sci_handle *tisci;
+ const struct ti_sci_rm_udmap_ops *tisci_udmap_ops;
+ const struct ti_sci_rm_psil_ops *tisci_psil_ops;
+ u32 tisci_dev_id;
+ u32 tisci_navss_dev_id;
+ bool is_coherent;
+};
+
+struct udma_chan {
+ struct udma_dev *ud;
+ char name[20];
+
+ struct udma_tchan *tchan;
+ struct udma_rchan *rchan;
+ struct udma_rflow *rflow;
+
+ u32 bcnt; /* number of bytes completed since the start of the channel */
+
+ bool pkt_mode; /* TR or packet */
+ bool needs_epib; /* EPIB is needed for the communication or not */
+ u32 psd_size; /* size of Protocol Specific Data */
+ u32 metadata_size; /* (needs_epib ? 16:0) + psd_size */
+ int slave_thread_id;
+ u32 src_thread;
+ u32 dst_thread;
+ u32 static_tr_type;
+
+ u32 id;
+ enum dma_direction dir;
+
+ struct cppi5_host_desc_t *desc_tx;
+ u32 hdesc_size;
+ bool in_use;
+ void *desc_rx;
+ u32 num_rx_bufs;
+ u32 desc_rx_cur;
+
+};
+
+#define UDMA_CH_1000(ch) (ch * 0x1000)
+#define UDMA_CH_100(ch) (ch * 0x100)
+#define UDMA_CH_40(ch) (ch * 0x40)
+
+#ifdef PKTBUFSRX
+#define UDMA_RX_DESC_NUM PKTBUFSRX
+#else
+#define UDMA_RX_DESC_NUM 4
+#endif
+
+/* Generic register access functions */
+static inline u32 udma_read(void __iomem *base, int reg)
+{
+ u32 v;
+
+ v = __raw_readl(base + reg);
+ pr_debug("READL(32): v(%08X)<--reg(%p)\n", v, base + reg);
+ return v;
+}
+
+static inline void udma_write(void __iomem *base, int reg, u32 val)
+{
+ pr_debug("WRITEL(32): v(%08X)-->reg(%p)\n", val, base + reg);
+ __raw_writel(val, base + reg);
+}
+
+static inline void udma_update_bits(void __iomem *base, int reg,
+ u32 mask, u32 val)
+{
+ u32 tmp, orig;
+
+ orig = udma_read(base, reg);
+ tmp = orig & ~mask;
+ tmp |= (val & mask);
+
+ if (tmp != orig)
+ udma_write(base, reg, tmp);
+}
+
+/* TCHANRT */
+static inline u32 udma_tchanrt_read(struct udma_tchan *tchan, int reg)
+{
+ if (!tchan)
+ return 0;
+ return udma_read(tchan->reg_rt, reg);
+}
+
+static inline void udma_tchanrt_write(struct udma_tchan *tchan,
+ int reg, u32 val)
+{
+ if (!tchan)
+ return;
+ udma_write(tchan->reg_rt, reg, val);
+}
+
+/* RCHANRT */
+static inline u32 udma_rchanrt_read(struct udma_rchan *rchan, int reg)
+{
+ if (!rchan)
+ return 0;
+ return udma_read(rchan->reg_rt, reg);
+}
+
+static inline void udma_rchanrt_write(struct udma_rchan *rchan,
+ int reg, u32 val)
+{
+ if (!rchan)
+ return;
+ udma_write(rchan->reg_rt, reg, val);
+}
+
+static inline int udma_navss_psil_pair(struct udma_dev *ud, u32 src_thread,
+ u32 dst_thread)
+{
+ dst_thread |= UDMA_PSIL_DST_THREAD_ID_OFFSET;
+ return ud->tisci_psil_ops->pair(ud->tisci,
+ ud->tisci_navss_dev_id,
+ src_thread, dst_thread);
+}
+
+static inline int udma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
+ u32 dst_thread)
+{
+ dst_thread |= UDMA_PSIL_DST_THREAD_ID_OFFSET;
+ return ud->tisci_psil_ops->unpair(ud->tisci,
+ ud->tisci_navss_dev_id,
+ src_thread, dst_thread);
+}
+
+static inline char *udma_get_dir_text(enum dma_direction dir)
+{
+ switch (dir) {
+ case DMA_DEV_TO_MEM:
+ return "DEV_TO_MEM";
+ case DMA_MEM_TO_DEV:
+ return "MEM_TO_DEV";
+ case DMA_MEM_TO_MEM:
+ return "MEM_TO_MEM";
+ case DMA_DEV_TO_DEV:
+ return "DEV_TO_DEV";
+ default:
+ break;
+ }
+
+ return "invalid";
+}
+
+static inline bool udma_is_chan_running(struct udma_chan *uc)
+{
+ u32 trt_ctl = 0;
+ u32 rrt_ctl = 0;
+
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ rrt_ctl = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_CTL_REG);
+ pr_debug("%s: rrt_ctl: 0x%08x (peer: 0x%08x)\n",
+ __func__, rrt_ctl,
+ udma_rchanrt_read(uc->rchan,
+ UDMA_RCHAN_RT_PEER_RT_EN_REG));
+ break;
+ case DMA_MEM_TO_DEV:
+ trt_ctl = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG);
+ pr_debug("%s: trt_ctl: 0x%08x (peer: 0x%08x)\n",
+ __func__, trt_ctl,
+ udma_tchanrt_read(uc->tchan,
+ UDMA_TCHAN_RT_PEER_RT_EN_REG));
+ break;
+ case DMA_MEM_TO_MEM:
+ trt_ctl = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG);
+ rrt_ctl = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_CTL_REG);
+ break;
+ default:
+ break;
+ }
+
+ if (trt_ctl & UDMA_CHAN_RT_CTL_EN || rrt_ctl & UDMA_CHAN_RT_CTL_EN)
+ return true;
+
+ return false;
+}
+
+static int udma_is_coherent(struct udma_chan *uc)
+{
+ return uc->ud->is_coherent;
+}
+
+static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
+{
+ struct k3_nav_ring *ring = NULL;
+ int ret = -ENOENT;
+
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ ring = uc->rchan->r_ring;
+ break;
+ case DMA_MEM_TO_DEV:
+ ring = uc->tchan->tc_ring;
+ break;
+ case DMA_MEM_TO_MEM:
+ ring = uc->tchan->tc_ring;
+ break;
+ default:
+ break;
+ }
+
+ if (ring && k3_nav_ringacc_ring_get_occ(ring))
+ ret = k3_nav_ringacc_ring_pop(ring, addr);
+
+ return ret;
+}
+
+static void udma_reset_rings(struct udma_chan *uc)
+{
+ struct k3_nav_ring *ring1 = NULL;
+ struct k3_nav_ring *ring2 = NULL;
+
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ ring1 = uc->rchan->fd_ring;
+ ring2 = uc->rchan->r_ring;
+ break;
+ case DMA_MEM_TO_DEV:
+ ring1 = uc->tchan->t_ring;
+ ring2 = uc->tchan->tc_ring;
+ break;
+ case DMA_MEM_TO_MEM:
+ ring1 = uc->tchan->t_ring;
+ ring2 = uc->tchan->tc_ring;
+ break;
+ default:
+ break;
+ }
+
+ if (ring1)
+ k3_nav_ringacc_ring_reset_dma(ring1, 0);
+ if (ring2)
+ k3_nav_ringacc_ring_reset(ring2);
+}
+
+static void udma_reset_counters(struct udma_chan *uc)
+{
+ u32 val;
+
+ if (uc->tchan) {
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_BCNT_REG);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_BCNT_REG, val);
+
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_SBCNT_REG);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_SBCNT_REG, val);
+
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PCNT_REG);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PCNT_REG, val);
+
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PEER_BCNT_REG);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_BCNT_REG, val);
+ }
+
+ if (uc->rchan) {
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_BCNT_REG);
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_BCNT_REG, val);
+
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_SBCNT_REG);
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_SBCNT_REG, val);
+
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_PCNT_REG);
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PCNT_REG, val);
+
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_PEER_BCNT_REG);
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_BCNT_REG, val);
+ }
+
+ uc->bcnt = 0;
+}
+
+static inline int udma_stop_hard(struct udma_chan *uc)
+{
+ pr_debug("%s: ENTER (chan%d)\n", __func__, uc->id);
+
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG, 0);
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, 0);
+ break;
+ case DMA_MEM_TO_DEV:
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, 0);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG, 0);
+ break;
+ case DMA_MEM_TO_MEM:
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, 0);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int udma_start(struct udma_chan *uc)
+{
+ /* Channel is already running, no need to proceed further */
+ if (udma_is_chan_running(uc))
+ goto out;
+
+ pr_debug("%s: chan:%d dir:%s (static_tr_type: %d)\n",
+ __func__, uc->id, udma_get_dir_text(uc->dir),
+ uc->static_tr_type);
+
+ /* Make sure that we clear the teardown bit, if it is set */
+ udma_stop_hard(uc);
+
+ /* Reset all counters */
+ udma_reset_counters(uc);
+
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG,
+ UDMA_CHAN_RT_CTL_EN);
+
+ /* Enable remote */
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG,
+ UDMA_PEER_RT_EN_ENABLE);
+
+ pr_debug("%s(rx): RT_CTL:0x%08x PEER RT_ENABLE:0x%08x\n",
+ __func__,
+ udma_rchanrt_read(uc->rchan,
+ UDMA_RCHAN_RT_CTL_REG),
+ udma_rchanrt_read(uc->rchan,
+ UDMA_RCHAN_RT_PEER_RT_EN_REG));
+ break;
+ case DMA_MEM_TO_DEV:
+ /* Enable remote */
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG,
+ UDMA_PEER_RT_EN_ENABLE);
+
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG,
+ UDMA_CHAN_RT_CTL_EN);
+
+ pr_debug("%s(tx): RT_CTL:0x%08x PEER RT_ENABLE:0x%08x\n",
+ __func__,
+ udma_rchanrt_read(uc->rchan,
+ UDMA_TCHAN_RT_CTL_REG),
+ udma_rchanrt_read(uc->rchan,
+ UDMA_TCHAN_RT_PEER_RT_EN_REG));
+ break;
+ case DMA_MEM_TO_MEM:
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG,
+ UDMA_CHAN_RT_CTL_EN);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG,
+ UDMA_CHAN_RT_CTL_EN);
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ pr_debug("%s: DONE chan:%d\n", __func__, uc->id);
+out:
+ return 0;
+}
+
+static inline void udma_stop_mem2dev(struct udma_chan *uc, bool sync)
+{
+ int i = 0;
+ u32 val;
+
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG,
+ UDMA_CHAN_RT_CTL_EN |
+ UDMA_CHAN_RT_CTL_TDOWN);
+
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG);
+
+ while (sync && (val & UDMA_CHAN_RT_CTL_EN)) {
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_CTL_REG);
+ udelay(1);
+ if (i > 1000) {
+ printf(" %s TIMEOUT !\n", __func__);
+ break;
+ }
+ i++;
+ }
+
+ val = udma_tchanrt_read(uc->tchan, UDMA_TCHAN_RT_PEER_RT_EN_REG);
+ if (val & UDMA_PEER_RT_EN_ENABLE)
+ printf("%s: peer not stopped TIMEOUT !\n", __func__);
+}
+
+static inline void udma_stop_dev2mem(struct udma_chan *uc, bool sync)
+{
+ int i = 0;
+ u32 val;
+
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG,
+ UDMA_PEER_RT_EN_ENABLE |
+ UDMA_PEER_RT_EN_TEARDOWN);
+
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_CTL_REG);
+
+ while (sync && (val & UDMA_CHAN_RT_CTL_EN)) {
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_CTL_REG);
+ udelay(1);
+ if (i > 1000) {
+ printf("%s TIMEOUT !\n", __func__);
+ break;
+ }
+ i++;
+ }
+
+ val = udma_rchanrt_read(uc->rchan, UDMA_RCHAN_RT_PEER_RT_EN_REG);
+ if (val & UDMA_PEER_RT_EN_ENABLE)
+ printf("%s: peer not stopped TIMEOUT !\n", __func__);
+}
+
+static inline int udma_stop(struct udma_chan *uc)
+{
+ pr_debug("%s: chan:%d dir:%s\n",
+ __func__, uc->id, udma_get_dir_text(uc->dir));
+
+ udma_reset_counters(uc);
+ switch (uc->dir) {
+ case DMA_DEV_TO_MEM:
+ udma_stop_dev2mem(uc, true);
+ break;
+ case DMA_MEM_TO_DEV:
+ udma_stop_mem2dev(uc, true);
+ break;
+ case DMA_MEM_TO_MEM:
+ udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG, 0);
+ udma_tchanrt_write(uc->tchan, UDMA_TCHAN_RT_CTL_REG, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void udma_poll_completion(struct udma_chan *uc, dma_addr_t *paddr)
+{
+ int i = 1;
+
+ while (udma_pop_from_ring(uc, paddr)) {
+ udelay(1);
+ if (!(i % 1000000))
+ printf(".");
+ i++;
+ }
+}
+
+#define UDMA_RESERVE_RESOURCE(res) \
+static struct udma_##res *__udma_reserve_##res(struct udma_dev *ud, \
+ int id) \
+{ \
+ if (id >= 0) { \
+ if (test_bit(id, ud->res##_map)) { \
+ dev_err(ud->dev, "res##%d is in use\n", id); \
+ return ERR_PTR(-ENOENT); \
+ } \
+ } else { \
+ id = find_first_zero_bit(ud->res##_map, ud->res##_cnt); \
+ if (id == ud->res##_cnt) { \
+ return ERR_PTR(-ENOENT); \
+ } \
+ } \
+ \
+ __set_bit(id, ud->res##_map); \
+ return &ud->res##s[id]; \
+}
+
+UDMA_RESERVE_RESOURCE(tchan);
+UDMA_RESERVE_RESOURCE(rchan);
+UDMA_RESERVE_RESOURCE(rflow);
+
+static int udma_get_tchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->tchan) {
+ dev_dbg(ud->dev, "chan%d: already have tchan%d allocated\n",
+ uc->id, uc->tchan->id);
+ return 0;
+ }
+
+ uc->tchan = __udma_reserve_tchan(ud, -1);
+ if (IS_ERR(uc->tchan))
+ return PTR_ERR(uc->tchan);
+
+ pr_debug("chan%d: got tchan%d\n", uc->id, uc->tchan->id);
+
+ if (udma_is_chan_running(uc)) {
+ dev_warn(ud->dev, "chan%d: tchan%d is running!\n", uc->id,
+ uc->tchan->id);
+ udma_stop(uc);
+ if (udma_is_chan_running(uc))
+ dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
+ }
+
+ return 0;
+}
+
+static int udma_get_rchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rchan) {
+ dev_dbg(ud->dev, "chan%d: already have rchan%d allocated\n",
+ uc->id, uc->rchan->id);
+ return 0;
+ }
+
+ uc->rchan = __udma_reserve_rchan(ud, -1);
+ if (IS_ERR(uc->rchan))
+ return PTR_ERR(uc->rchan);
+
+ pr_debug("chan%d: got rchan%d\n", uc->id, uc->rchan->id);
+
+ if (udma_is_chan_running(uc)) {
+ dev_warn(ud->dev, "chan%d: rchan%d is running!\n", uc->id,
+ uc->rchan->id);
+ udma_stop(uc);
+ if (udma_is_chan_running(uc))
+ dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
+ }
+
+ return 0;
+}
+
+static int udma_get_chan_pair(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int chan_id, end;
+
+ if ((uc->tchan && uc->rchan) && uc->tchan->id == uc->rchan->id) {
+ dev_info(ud->dev, "chan%d: already have %d pair allocated\n",
+ uc->id, uc->tchan->id);
+ return 0;
+ }
+
+ if (uc->tchan) {
+ dev_err(ud->dev, "chan%d: already have tchan%d allocated\n",
+ uc->id, uc->tchan->id);
+ return -EBUSY;
+ } else if (uc->rchan) {
+ dev_err(ud->dev, "chan%d: already have rchan%d allocated\n",
+ uc->id, uc->rchan->id);
+ return -EBUSY;
+ }
+
+ /* Can be optimized, but let's have it like this for now */
+ end = min(ud->tchan_cnt, ud->rchan_cnt);
+ for (chan_id = 0; chan_id < end; chan_id++) {
+ if (!test_bit(chan_id, ud->tchan_map) &&
+ !test_bit(chan_id, ud->rchan_map))
+ break;
+ }
+
+ if (chan_id == end)
+ return -ENOENT;
+
+ __set_bit(chan_id, ud->tchan_map);
+ __set_bit(chan_id, ud->rchan_map);
+ uc->tchan = &ud->tchans[chan_id];
+ uc->rchan = &ud->rchans[chan_id];
+
+ pr_debug("chan%d: got t/rchan%d pair\n", uc->id, chan_id);
+
+ if (udma_is_chan_running(uc)) {
+ dev_warn(ud->dev, "chan%d: t/rchan%d pair is running!\n",
+ uc->id, chan_id);
+ udma_stop(uc);
+ if (udma_is_chan_running(uc))
+ dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
+ }
+
+ return 0;
+}
+
+static int udma_get_rflow(struct udma_chan *uc, int flow_id)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rflow) {
+ dev_dbg(ud->dev, "chan%d: already have rflow%d allocated\n",
+ uc->id, uc->rflow->id);
+ return 0;
+ }
+
+ if (!uc->rchan)
+ dev_warn(ud->dev, "chan%d: does not have rchan??\n", uc->id);
+
+ uc->rflow = __udma_reserve_rflow(ud, flow_id);
+ if (IS_ERR(uc->rflow))
+ return PTR_ERR(uc->rflow);
+
+ pr_debug("chan%d: got rflow%d\n", uc->id, uc->rflow->id);
+ return 0;
+}
+
+static void udma_put_rchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rchan) {
+ dev_dbg(ud->dev, "chan%d: put rchan%d\n", uc->id,
+ uc->rchan->id);
+ __clear_bit(uc->rchan->id, ud->rchan_map);
+ uc->rchan = NULL;
+ }
+}
+
+static void udma_put_tchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->tchan) {
+ dev_dbg(ud->dev, "chan%d: put tchan%d\n", uc->id,
+ uc->tchan->id);
+ __clear_bit(uc->tchan->id, ud->tchan_map);
+ uc->tchan = NULL;
+ }
+}
+
+static void udma_put_rflow(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rflow) {
+ dev_dbg(ud->dev, "chan%d: put rflow%d\n", uc->id,
+ uc->rflow->id);
+ __clear_bit(uc->rflow->id, ud->rflow_map);
+ uc->rflow = NULL;
+ }
+}
+
+static void udma_free_tx_resources(struct udma_chan *uc)
+{
+ if (!uc->tchan)
+ return;
+
+ k3_nav_ringacc_ring_free(uc->tchan->t_ring);
+ k3_nav_ringacc_ring_free(uc->tchan->tc_ring);
+ uc->tchan->t_ring = NULL;
+ uc->tchan->tc_ring = NULL;
+
+ udma_put_tchan(uc);
+}
+
+static int udma_alloc_tx_resources(struct udma_chan *uc)
+{
+ struct k3_nav_ring_cfg ring_cfg;
+ struct udma_dev *ud = uc->ud;
+ int ret;
+
+ ret = udma_get_tchan(uc);
+ if (ret)
+ return ret;
+
+ uc->tchan->t_ring = k3_nav_ringacc_request_ring(
+ ud->ringacc, uc->tchan->id,
+ RINGACC_RING_USE_PROXY);
+ if (!uc->tchan->t_ring) {
+ ret = -EBUSY;
+ goto err_tx_ring;
+ }
+
+ uc->tchan->tc_ring = k3_nav_ringacc_request_ring(
+ ud->ringacc, -1, RINGACC_RING_USE_PROXY);
+ if (!uc->tchan->tc_ring) {
+ ret = -EBUSY;
+ goto err_txc_ring;
+ }
+
+ memset(&ring_cfg, 0, sizeof(ring_cfg));
+ ring_cfg.size = 16;
+ ring_cfg.elm_size = K3_NAV_RINGACC_RING_ELSIZE_8;
+ ring_cfg.mode = K3_NAV_RINGACC_RING_MODE_MESSAGE;
+
+ ret = k3_nav_ringacc_ring_cfg(uc->tchan->t_ring, &ring_cfg);
+ ret |= k3_nav_ringacc_ring_cfg(uc->tchan->tc_ring, &ring_cfg);
+
+ if (ret)
+ goto err_ringcfg;
+
+ return 0;
+
+err_ringcfg:
+ k3_nav_ringacc_ring_free(uc->tchan->tc_ring);
+ uc->tchan->tc_ring = NULL;
+err_txc_ring:
+ k3_nav_ringacc_ring_free(uc->tchan->t_ring);
+ uc->tchan->t_ring = NULL;
+err_tx_ring:
+ udma_put_tchan(uc);
+
+ return ret;
+}
+
+static void udma_free_rx_resources(struct udma_chan *uc)
+{
+ if (!uc->rchan)
+ return;
+
+ k3_nav_ringacc_ring_free(uc->rchan->fd_ring);
+ k3_nav_ringacc_ring_free(uc->rchan->r_ring);
+ uc->rchan->fd_ring = NULL;
+ uc->rchan->r_ring = NULL;
+
+ udma_put_rflow(uc);
+ udma_put_rchan(uc);
+}
+
+static int udma_alloc_rx_resources(struct udma_chan *uc)
+{
+ struct k3_nav_ring_cfg ring_cfg;
+ struct udma_dev *ud = uc->ud;
+ int fd_ring_id;
+ int ret;
+
+ ret = udma_get_rchan(uc);
+ if (ret)
+ return ret;
+
+ /* For MEM_TO_MEM we don't need rflow or rings */
+ if (uc->dir == DMA_MEM_TO_MEM)
+ return 0;
+
+ ret = udma_get_rflow(uc, uc->rchan->id);
+ if (ret) {
+ ret = -EBUSY;
+ goto err_rflow;
+ }
+
+ fd_ring_id = ud->tchan_cnt + ud->echan_cnt + uc->rchan->id;
+
+ uc->rchan->fd_ring = k3_nav_ringacc_request_ring(
+ ud->ringacc, fd_ring_id,
+ RINGACC_RING_USE_PROXY);
+ if (!uc->rchan->fd_ring) {
+ ret = -EBUSY;
+ goto err_rx_ring;
+ }
+
+ uc->rchan->r_ring = k3_nav_ringacc_request_ring(
+ ud->ringacc, -1, RINGACC_RING_USE_PROXY);
+ if (!uc->rchan->r_ring) {
+ ret = -EBUSY;
+ goto err_rxc_ring;
+ }
+
+ memset(&ring_cfg, 0, sizeof(ring_cfg));
+ ring_cfg.size = 16;
+ ring_cfg.elm_size = K3_NAV_RINGACC_RING_ELSIZE_8;
+ ring_cfg.mode = K3_NAV_RINGACC_RING_MODE_MESSAGE;
+
+ ret = k3_nav_ringacc_ring_cfg(uc->rchan->fd_ring, &ring_cfg);
+ ret |= k3_nav_ringacc_ring_cfg(uc->rchan->r_ring, &ring_cfg);
+
+ if (ret)
+ goto err_ringcfg;
+
+ return 0;
+
+err_ringcfg:
+ k3_nav_ringacc_ring_free(uc->rchan->r_ring);
+ uc->rchan->r_ring = NULL;
+err_rxc_ring:
+ k3_nav_ringacc_ring_free(uc->rchan->fd_ring);
+ uc->rchan->fd_ring = NULL;
+err_rx_ring:
+ udma_put_rflow(uc);
+err_rflow:
+ udma_put_rchan(uc);
+
+ return ret;
+}
+
+static int udma_alloc_tchan_sci_req(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int tc_ring = k3_nav_ringacc_get_ring_id(uc->tchan->tc_ring);
+ struct ti_sci_msg_rm_udmap_tx_ch_cfg req;
+ u32 mode;
+ int ret;
+
+ if (uc->pkt_mode)
+ mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
+ else
+ mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR;
+
+ req.valid_params = TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID;
+ req.nav_id = ud->tisci_dev_id;
+ req.index = uc->tchan->id;
+ req.tx_chan_type = mode;
+ if (uc->dir == DMA_MEM_TO_MEM)
+ req.tx_fetch_size = sizeof(struct cppi5_desc_hdr_t) >> 2;
+ else
+ req.tx_fetch_size = cppi5_hdesc_calc_size(uc->needs_epib,
+ uc->psd_size,
+ 0) >> 2;
+ req.txcq_qnum = tc_ring;
+
+ ret = ud->tisci_udmap_ops->tx_ch_cfg(ud->tisci, &req);
+ if (ret)
+ dev_err(ud->dev, "tisci tx alloc failed %d\n", ret);
+
+ return ret;
+}
+
+static int udma_alloc_rchan_sci_req(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int fd_ring = k3_nav_ringacc_get_ring_id(uc->rchan->fd_ring);
+ int rx_ring = k3_nav_ringacc_get_ring_id(uc->rchan->r_ring);
+ int tc_ring = k3_nav_ringacc_get_ring_id(uc->tchan->tc_ring);
+ struct ti_sci_msg_rm_udmap_rx_ch_cfg req = { 0 };
+ struct ti_sci_msg_rm_udmap_flow_cfg flow_req = { 0 };
+ u32 mode;
+ int ret;
+
+ if (uc->pkt_mode)
+ mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
+ else
+ mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR;
+
+ req.valid_params = TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID;
+ req.nav_id = ud->tisci_dev_id;
+ req.index = uc->rchan->id;
+ req.rx_chan_type = mode;
+ if (uc->dir == DMA_MEM_TO_MEM) {
+ req.rx_fetch_size = sizeof(struct cppi5_desc_hdr_t) >> 2;
+ req.rxcq_qnum = tc_ring;
+ } else {
+ req.rx_fetch_size = cppi5_hdesc_calc_size(uc->needs_epib,
+ uc->psd_size,
+ 0) >> 2;
+ req.rxcq_qnum = rx_ring;
+ }
+ if (uc->rflow->id != uc->rchan->id && uc->dir != DMA_MEM_TO_MEM) {
+ req.flowid_start = uc->rflow->id;
+ req.flowid_cnt = 1;
+ req.valid_params |=
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_START_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_CNT_VALID;
+ }
+
+ ret = ud->tisci_udmap_ops->rx_ch_cfg(ud->tisci, &req);
+ if (ret) {
+ dev_err(ud->dev, "tisci rx %u cfg failed %d\n",
+ uc->rchan->id, ret);
+ return ret;
+ }
+ if (uc->dir == DMA_MEM_TO_MEM)
+ return ret;
+
+ flow_req.valid_params =
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_EINFO_PRESENT_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_PSINFO_PRESENT_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_ERROR_HANDLING_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DESC_TYPE_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_SRC_TAG_HI_SEL_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_SRC_TAG_LO_SEL_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_TAG_HI_SEL_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_TAG_LO_SEL_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ0_SZ0_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ1_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ2_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_FDQ3_QNUM_VALID |
+ TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_PS_LOCATION_VALID;
+
+ flow_req.nav_id = ud->tisci_dev_id;
+ flow_req.flow_index = uc->rflow->id;
+
+ if (uc->needs_epib)
+ flow_req.rx_einfo_present = 1;
+ else
+ flow_req.rx_einfo_present = 0;
+
+ if (uc->psd_size)
+ flow_req.rx_psinfo_present = 1;
+ else
+ flow_req.rx_psinfo_present = 0;
+
+ flow_req.rx_error_handling = 0;
+ flow_req.rx_desc_type = 0;
+ flow_req.rx_dest_qnum = rx_ring;
+ flow_req.rx_src_tag_hi_sel = 2;
+ flow_req.rx_src_tag_lo_sel = 4;
+ flow_req.rx_dest_tag_hi_sel = 5;
+ flow_req.rx_dest_tag_lo_sel = 4;
+ flow_req.rx_fdq0_sz0_qnum = fd_ring;
+ flow_req.rx_fdq1_qnum = fd_ring;
+ flow_req.rx_fdq2_qnum = fd_ring;
+ flow_req.rx_fdq3_qnum = fd_ring;
+ flow_req.rx_ps_location = 0;
+
+ ret = ud->tisci_udmap_ops->rx_flow_cfg(ud->tisci, &flow_req);
+ if (ret)
+ dev_err(ud->dev, "tisci rx %u flow %u cfg failed %d\n",
+ uc->rchan->id, uc->rflow->id, ret);
+
+ return ret;
+}
+
+static int udma_alloc_chan_resources(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int ret;
+
+ pr_debug("%s: chan:%d as %s\n",
+ __func__, uc->id, udma_get_dir_text(uc->dir));
+
+ switch (uc->dir) {
+ case DMA_MEM_TO_MEM:
+ /* Non synchronized - mem to mem type of transfer */
+ ret = udma_get_chan_pair(uc);
+ if (ret)
+ return ret;
+
+ ret = udma_alloc_tx_resources(uc);
+ if (ret)
+ goto err_free_res;
+
+ ret = udma_alloc_rx_resources(uc);
+ if (ret)
+ goto err_free_res;
+
+ uc->src_thread = ud->psil_base + uc->tchan->id;
+ uc->dst_thread = (ud->psil_base + uc->rchan->id) | 0x8000;
+ break;
+ case DMA_MEM_TO_DEV:
+ /* Slave transfer synchronized - mem to dev (TX) trasnfer */
+ ret = udma_alloc_tx_resources(uc);
+ if (ret)
+ goto err_free_res;
+
+ uc->src_thread = ud->psil_base + uc->tchan->id;
+ uc->dst_thread = uc->slave_thread_id;
+ if (!(uc->dst_thread & 0x8000))
+ uc->dst_thread |= 0x8000;
+
+ break;
+ case DMA_DEV_TO_MEM:
+ /* Slave transfer synchronized - dev to mem (RX) trasnfer */
+ ret = udma_alloc_rx_resources(uc);
+ if (ret)
+ goto err_free_res;
+
+ uc->src_thread = uc->slave_thread_id;
+ uc->dst_thread = (ud->psil_base + uc->rchan->id) | 0x8000;
+
+ break;
+ default:
+ /* Can not happen */
+ pr_debug("%s: chan:%d invalid direction (%u)\n",
+ __func__, uc->id, uc->dir);
+ return -EINVAL;
+ }
+
+ /* We have channel indexes and rings */
+ if (uc->dir == DMA_MEM_TO_MEM) {
+ ret = udma_alloc_tchan_sci_req(uc);
+ if (ret)
+ goto err_free_res;
+
+ ret = udma_alloc_rchan_sci_req(uc);
+ if (ret)
+ goto err_free_res;
+ } else {
+ /* Slave transfer */
+ if (uc->dir == DMA_MEM_TO_DEV) {
+ ret = udma_alloc_tchan_sci_req(uc);
+ if (ret)
+ goto err_free_res;
+ } else {
+ ret = udma_alloc_rchan_sci_req(uc);
+ if (ret)
+ goto err_free_res;
+ }
+ }
+
+ /* PSI-L pairing */
+ ret = udma_navss_psil_pair(ud, uc->src_thread, uc->dst_thread);
+ if (ret) {
+ dev_err(ud->dev, "k3_nav_psil_request_link fail\n");
+ goto err_free_res;
+ }
+
+ return 0;
+
+err_free_res:
+ udma_free_tx_resources(uc);
+ udma_free_rx_resources(uc);
+ uc->slave_thread_id = -1;
+ return ret;
+}
+
+static void udma_free_chan_resources(struct udma_chan *uc)
+{
+ /* Some configuration to UDMA-P channel: disable, reset, whatever */
+
+ /* Release PSI-L pairing */
+ udma_navss_psil_unpair(uc->ud, uc->src_thread, uc->dst_thread);
+
+ /* Reset the rings for a new start */
+ udma_reset_rings(uc);
+ udma_free_tx_resources(uc);
+ udma_free_rx_resources(uc);
+
+ uc->slave_thread_id = -1;
+ uc->dir = DMA_MEM_TO_MEM;
+}
+
+static int udma_get_mmrs(struct udevice *dev)
+{
+ struct udma_dev *ud = dev_get_priv(dev);
+ int i;
+
+ for (i = 0; i < MMR_LAST; i++) {
+ ud->mmrs[i] = (uint32_t *)devfdt_get_addr_name(dev,
+ mmr_names[i]);
+ if (!ud->mmrs[i])
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#define UDMA_MAX_CHANNELS 192
+
+static int udma_probe(struct udevice *dev)
+{
+ struct dma_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct udma_dev *ud = dev_get_priv(dev);
+ int i, ret;
+ u32 cap2, cap3;
+ struct udevice *tmp;
+ struct udevice *tisci_dev = NULL;
+
+ ret = udma_get_mmrs(dev);
+ if (ret)
+ return ret;
+
+ ret = uclass_get_device_by_phandle(UCLASS_MISC, dev,
+ "ti,ringacc", &tmp);
+ ud->ringacc = dev_get_priv(tmp);
+ if (IS_ERR(ud->ringacc))
+ return PTR_ERR(ud->ringacc);
+
+ ud->psil_base = dev_read_u32_default(dev, "ti,psil-base", 0);
+ if (!ud->psil_base) {
+ dev_info(dev,
+ "Missing ti,psil-base property, using %d.\n", ret);
+ return -EINVAL;
+ }
+
+ ret = uclass_get_device_by_name(UCLASS_FIRMWARE, "dmsc", &tisci_dev);
+ if (ret) {
+ debug("TISCI RA RM get failed (%d)\n", ret);
+ ud->tisci = NULL;
+ return 0;
+ }
+ ud->tisci = (struct ti_sci_handle *)
+ (ti_sci_get_handle_from_sysfw(tisci_dev));
+
+ ret = dev_read_u32_default(dev, "ti,sci", 0);
+ if (!ret) {
+ dev_err(dev, "TISCI RA RM disabled\n");
+ ud->tisci = NULL;
+ }
+
+ if (ud->tisci) {
+ ofnode navss_ofnode = ofnode_get_parent(dev_ofnode(dev));
+
+ ud->tisci_dev_id = -1;
+ ret = dev_read_u32(dev, "ti,sci-dev-id", &ud->tisci_dev_id);
+ if (ret) {
+ dev_err(dev, "ti,sci-dev-id read failure %d\n", ret);
+ return ret;
+ }
+
+ ud->tisci_navss_dev_id = -1;
+ ret = ofnode_read_u32(navss_ofnode, "ti,sci-dev-id",
+ &ud->tisci_navss_dev_id);
+ if (ret) {
+ dev_err(dev, "navss sci-dev-id read failure %d\n", ret);
+ return ret;
+ }
+
+ ud->tisci_udmap_ops = &ud->tisci->ops.rm_udmap_ops;
+ ud->tisci_psil_ops = &ud->tisci->ops.rm_psil_ops;
+ }
+
+ ud->is_coherent = dev_read_bool(dev, "dma-coherent");
+
+ cap2 = udma_read(ud->mmrs[MMR_GCFG], 0x28);
+ cap3 = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
+
+ ud->rflow_cnt = cap3 & 0x3fff;
+ ud->tchan_cnt = cap2 & 0x1ff;
+ ud->echan_cnt = (cap2 >> 9) & 0x1ff;
+ ud->rchan_cnt = (cap2 >> 18) & 0x1ff;
+ ud->ch_count = ud->tchan_cnt + ud->rchan_cnt;
+
+ dev_info(dev,
+ "Number of channels: %u (tchan: %u, echan: %u, rchan: %u dev-id %u)\n",
+ ud->ch_count, ud->tchan_cnt, ud->echan_cnt, ud->rchan_cnt,
+ ud->tisci_dev_id);
+ dev_info(dev, "Number of rflows: %u\n", ud->rflow_cnt);
+
+ ud->channels = devm_kcalloc(dev, ud->ch_count, sizeof(*ud->channels),
+ GFP_KERNEL);
+ ud->tchan_map = devm_kcalloc(dev, BITS_TO_LONGS(ud->tchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->tchans = devm_kcalloc(dev, ud->tchan_cnt,
+ sizeof(*ud->tchans), GFP_KERNEL);
+ ud->rchan_map = devm_kcalloc(dev, BITS_TO_LONGS(ud->rchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->rchans = devm_kcalloc(dev, ud->rchan_cnt,
+ sizeof(*ud->rchans), GFP_KERNEL);
+ ud->rflow_map = devm_kcalloc(dev, BITS_TO_LONGS(ud->rflow_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->rflows = devm_kcalloc(dev, ud->rflow_cnt,
+ sizeof(*ud->rflows), GFP_KERNEL);
+
+ if (!ud->channels || !ud->tchan_map || !ud->rchan_map ||
+ !ud->rflow_map || !ud->tchans || !ud->rchans || !ud->rflows)
+ return -ENOMEM;
+
+ for (i = 0; i < ud->tchan_cnt; i++) {
+ struct udma_tchan *tchan = &ud->tchans[i];
+
+ tchan->id = i;
+ tchan->reg_rt = ud->mmrs[MMR_TCHANRT] + UDMA_CH_1000(i);
+ }
+
+ for (i = 0; i < ud->rchan_cnt; i++) {
+ struct udma_rchan *rchan = &ud->rchans[i];
+
+ rchan->id = i;
+ rchan->reg_rt = ud->mmrs[MMR_RCHANRT] + UDMA_CH_1000(i);
+ }
+
+ for (i = 0; i < ud->rflow_cnt; i++) {
+ struct udma_rflow *rflow = &ud->rflows[i];
+
+ rflow->id = i;
+ }
+
+ for (i = 0; i < ud->ch_count; i++) {
+ struct udma_chan *uc = &ud->channels[i];
+
+ uc->ud = ud;
+ uc->id = i;
+ uc->slave_thread_id = -1;
+ uc->tchan = NULL;
+ uc->rchan = NULL;
+ uc->dir = DMA_MEM_TO_MEM;
+ sprintf(uc->name, "UDMA chan%d\n", i);
+ if (!i)
+ uc->in_use = true;
+ }
+
+ pr_debug("UDMA(rev: 0x%08x) CAP0-3: 0x%08x, 0x%08x, 0x%08x, 0x%08x\n",
+ udma_read(ud->mmrs[MMR_GCFG], 0),
+ udma_read(ud->mmrs[MMR_GCFG], 0x20),
+ udma_read(ud->mmrs[MMR_GCFG], 0x24),
+ udma_read(ud->mmrs[MMR_GCFG], 0x28),
+ udma_read(ud->mmrs[MMR_GCFG], 0x2c));
+
+ uc_priv->supported = DMA_SUPPORTS_MEM_TO_MEM | DMA_SUPPORTS_MEM_TO_DEV;
+
+ return ret;
+}
+
+static int *udma_prep_dma_memcpy(struct udma_chan *uc, dma_addr_t dest,
+ dma_addr_t src, size_t len)
+{
+ u32 tc_ring_id = k3_nav_ringacc_get_ring_id(uc->tchan->tc_ring);
+ struct cppi5_tr_type15_t *tr_req;
+ int num_tr;
+ size_t tr_size = sizeof(struct cppi5_tr_type15_t);
+ u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
+ unsigned long dummy;
+ void *tr_desc;
+ size_t desc_size;
+
+ if (len < SZ_64K) {
+ num_tr = 1;
+ tr0_cnt0 = len;
+ tr0_cnt1 = 1;
+ } else {
+ unsigned long align_to = __ffs(src | dest);
+
+ if (align_to > 3)
+ align_to = 3;
+ /*
+ * Keep simple: tr0: SZ_64K-alignment blocks,
+ * tr1: the remaining
+ */
+ num_tr = 2;
+ tr0_cnt0 = (SZ_64K - BIT(align_to));
+ if (len / tr0_cnt0 >= SZ_64K) {
+ dev_err(uc->ud->dev, "size %zu is not supported\n",
+ len);
+ return NULL;
+ }
+
+ tr0_cnt1 = len / tr0_cnt0;
+ tr1_cnt0 = len % tr0_cnt0;
+ }
+
+ desc_size = cppi5_trdesc_calc_size(num_tr, tr_size);
+ tr_desc = dma_alloc_coherent(desc_size, &dummy);
+ if (!tr_desc)
+ return NULL;
+ memset(tr_desc, 0, desc_size);
+
+ cppi5_trdesc_init(tr_desc, num_tr, tr_size, 0, 0);
+ cppi5_desc_set_pktids(tr_desc, uc->id, 0x3fff);
+ cppi5_desc_set_retpolicy(tr_desc, 0, tc_ring_id);
+
+ tr_req = tr_desc + tr_size;
+
+ cppi5_tr_init(&tr_req[0].flags, CPPI5_TR_TYPE15, false, true,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 1);
+ cppi5_tr_csf_set(&tr_req[0].flags, CPPI5_TR_CSF_SUPR_EVT);
+
+ tr_req[0].addr = src;
+ tr_req[0].icnt0 = tr0_cnt0;
+ tr_req[0].icnt1 = tr0_cnt1;
+ tr_req[0].icnt2 = 1;
+ tr_req[0].icnt3 = 1;
+ tr_req[0].dim1 = tr0_cnt0;
+
+ tr_req[0].daddr = dest;
+ tr_req[0].dicnt0 = tr0_cnt0;
+ tr_req[0].dicnt1 = tr0_cnt1;
+ tr_req[0].dicnt2 = 1;
+ tr_req[0].dicnt3 = 1;
+ tr_req[0].ddim1 = tr0_cnt0;
+
+ if (num_tr == 2) {
+ cppi5_tr_init(&tr_req[1].flags, CPPI5_TR_TYPE15, false, true,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[1].flags, CPPI5_TR_CSF_SUPR_EVT);
+
+ tr_req[1].addr = src + tr0_cnt1 * tr0_cnt0;
+ tr_req[1].icnt0 = tr1_cnt0;
+ tr_req[1].icnt1 = 1;
+ tr_req[1].icnt2 = 1;
+ tr_req[1].icnt3 = 1;
+
+ tr_req[1].daddr = dest + tr0_cnt1 * tr0_cnt0;
+ tr_req[1].dicnt0 = tr1_cnt0;
+ tr_req[1].dicnt1 = 1;
+ tr_req[1].dicnt2 = 1;
+ tr_req[1].dicnt3 = 1;
+ }
+
+ cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, CPPI5_TR_CSF_EOP);
+
+ if (!udma_is_coherent(uc)) {
+ flush_dcache_range((u64)tr_desc,
+ ALIGN((u64)tr_desc + desc_size,
+ ARCH_DMA_MINALIGN));
+ }
+
+ k3_nav_ringacc_ring_push(uc->tchan->t_ring, &tr_desc);
+
+ return 0;
+}
+
+static int udma_transfer(struct udevice *dev, int direction,
+ void *dst, void *src, size_t len)
+{
+ struct udma_dev *ud = dev_get_priv(dev);
+ /* Channel0 is reserved for memcpy */
+ struct udma_chan *uc = &ud->channels[0];
+ dma_addr_t paddr = 0;
+ int ret;
+
+ ret = udma_alloc_chan_resources(uc);
+ if (ret)
+ return ret;
+
+ udma_prep_dma_memcpy(uc, (dma_addr_t)dst, (dma_addr_t)src, len);
+ udma_start(uc);
+ udma_poll_completion(uc, &paddr);
+ udma_stop(uc);
+
+ udma_free_chan_resources(uc);
+ return 0;
+}
+
+static int udma_request(struct dma *dma)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan *uc;
+ unsigned long dummy;
+ int ret;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+
+ uc = &ud->channels[dma->id];
+ ret = udma_alloc_chan_resources(uc);
+ if (ret) {
+ dev_err(dma->dev, "alloc dma res failed %d\n", ret);
+ return -EINVAL;
+ }
+
+ uc->hdesc_size = cppi5_hdesc_calc_size(uc->needs_epib,
+ uc->psd_size, 0);
+ uc->hdesc_size = ALIGN(uc->hdesc_size, ARCH_DMA_MINALIGN);
+
+ if (uc->dir == DMA_MEM_TO_DEV) {
+ uc->desc_tx = dma_alloc_coherent(uc->hdesc_size, &dummy);
+ memset(uc->desc_tx, 0, uc->hdesc_size);
+ } else {
+ uc->desc_rx = dma_alloc_coherent(
+ uc->hdesc_size * UDMA_RX_DESC_NUM, &dummy);
+ memset(uc->desc_rx, 0, uc->hdesc_size * UDMA_RX_DESC_NUM);
+ }
+
+ uc->in_use = true;
+ uc->desc_rx_cur = 0;
+ uc->num_rx_bufs = 0;
+
+ return 0;
+}
+
+static int udma_free(struct dma *dma)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan *uc;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ if (udma_is_chan_running(uc))
+ udma_stop(uc);
+ udma_free_chan_resources(uc);
+
+ uc->in_use = false;
+
+ return 0;
+}
+
+static int udma_enable(struct dma *dma)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan *uc;
+ int ret;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ ret = udma_start(uc);
+
+ return ret;
+}
+
+static int udma_disable(struct dma *dma)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan *uc;
+ int ret = 0;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ if (udma_is_chan_running(uc))
+ ret = udma_stop(uc);
+ else
+ dev_err(dma->dev, "%s not running\n", __func__);
+
+ return ret;
+}
+
+static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct cppi5_host_desc_t *desc_tx;
+ dma_addr_t dma_src = (dma_addr_t)src;
+ struct ti_udma_drv_packet_data packet_data = { 0 };
+ dma_addr_t paddr;
+ struct udma_chan *uc;
+ u32 tc_ring_id;
+ int ret;
+
+ if (!metadata)
+ packet_data = *((struct ti_udma_drv_packet_data *)metadata);
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ if (uc->dir != DMA_MEM_TO_DEV)
+ return -EINVAL;
+
+ tc_ring_id = k3_nav_ringacc_get_ring_id(uc->tchan->tc_ring);
+
+ desc_tx = uc->desc_tx;
+
+ cppi5_hdesc_reset_hbdesc(desc_tx);
+
+ cppi5_hdesc_init(desc_tx,
+ uc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_PRESENT : 0,
+ uc->psd_size);
+ cppi5_hdesc_set_pktlen(desc_tx, len);
+ cppi5_hdesc_attach_buf(desc_tx, dma_src, len, dma_src, len);
+ cppi5_desc_set_pktids(&desc_tx->hdr, uc->id, 0x3fff);
+ cppi5_desc_set_retpolicy(&desc_tx->hdr, 0, tc_ring_id);
+ /* pass below information from caller */
+ cppi5_hdesc_set_pkttype(desc_tx, packet_data.pkt_type);
+ cppi5_desc_set_tags_ids(&desc_tx->hdr, 0, packet_data.dest_tag);
+
+ if (!udma_is_coherent(uc)) {
+ flush_dcache_range((u64)dma_src,
+ ALIGN((u64)dma_src + len,
+ ARCH_DMA_MINALIGN));
+ flush_dcache_range((u64)desc_tx,
+ ALIGN((u64)desc_tx + uc->hdesc_size,
+ ARCH_DMA_MINALIGN));
+ }
+
+ ret = k3_nav_ringacc_ring_push(uc->tchan->t_ring, &uc->desc_tx);
+ if (ret) {
+ dev_err(dma->dev, "TX dma push fail ch_id %lu %d\n",
+ dma->id, ret);
+ return ret;
+ }
+
+ udma_poll_completion(uc, &paddr);
+
+ return 0;
+}
+
+static int udma_receive(struct dma *dma, void **dst, void *metadata)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct cppi5_host_desc_t *desc_rx;
+ dma_addr_t buf_dma;
+ struct udma_chan *uc;
+ u32 buf_dma_len, pkt_len;
+ u32 port_id = 0;
+ int ret;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ if (uc->dir != DMA_DEV_TO_MEM)
+ return -EINVAL;
+ if (!uc->num_rx_bufs)
+ return -EINVAL;
+
+ ret = k3_nav_ringacc_ring_pop(uc->rchan->r_ring, &desc_rx);
+ if (ret && ret != -ENODATA) {
+ dev_err(dma->dev, "rx dma fail ch_id:%lu %d\n", dma->id, ret);
+ return ret;
+ } else if (ret == -ENODATA) {
+ return 0;
+ }
+
+ /* invalidate cache data */
+ if (!udma_is_coherent(uc)) {
+ invalidate_dcache_range((ulong)desc_rx,
+ (ulong)(desc_rx + uc->hdesc_size));
+ }
+
+ cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
+ pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
+
+ /* invalidate cache data */
+ if (!udma_is_coherent(uc)) {
+ invalidate_dcache_range((ulong)buf_dma,
+ (ulong)(buf_dma + buf_dma_len));
+ }
+
+ cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
+
+ *dst = (void *)buf_dma;
+ uc->num_rx_bufs--;
+
+ return pkt_len;
+}
+
+static int udma_of_xlate(struct dma *dma, struct ofnode_phandle_args *args)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan *uc = &ud->channels[0];
+ ofnode chconf_node, slave_node;
+ char prop[50];
+ u32 val;
+
+ for (val = 0; val < ud->ch_count; val++) {
+ uc = &ud->channels[val];
+ if (!uc->in_use)
+ break;
+ }
+
+ if (val == ud->ch_count)
+ return -EBUSY;
+
+ uc->dir = DMA_DEV_TO_MEM;
+ if (args->args[2] == UDMA_DIR_TX)
+ uc->dir = DMA_MEM_TO_DEV;
+
+ slave_node = ofnode_get_by_phandle(args->args[0]);
+ if (!ofnode_valid(slave_node)) {
+ dev_err(ud->dev, "slave node is missing\n");
+ return -EINVAL;
+ }
+
+ snprintf(prop, sizeof(prop), "ti,psil-config%u", args->args[1]);
+ chconf_node = ofnode_find_subnode(slave_node, prop);
+ if (!ofnode_valid(chconf_node)) {
+ dev_err(ud->dev, "Channel configuration node is missing\n");
+ return -EINVAL;
+ }
+
+ if (!ofnode_read_u32(chconf_node, "linux,udma-mode", &val)) {
+ if (val == UDMA_PKT_MODE)
+ uc->pkt_mode = true;
+ }
+
+ if (!ofnode_read_u32(chconf_node, "statictr-type", &val))
+ uc->static_tr_type = val;
+
+ uc->needs_epib = ofnode_read_bool(chconf_node, "ti,needs-epib");
+ if (!ofnode_read_u32(chconf_node, "ti,psd-size", &val))
+ uc->psd_size = val;
+ uc->metadata_size = (uc->needs_epib ? 16 : 0) + uc->psd_size;
+
+ if (ofnode_read_u32(slave_node, "ti,psil-base", &val)) {
+ dev_err(ud->dev, "ti,psil-base is missing\n");
+ return -EINVAL;
+ }
+
+ uc->slave_thread_id = val + args->args[1];
+
+ dma->id = uc->id;
+ pr_debug("Allocated dma chn:%lu epib:%d psdata:%u meta:%u thread_id:%x\n",
+ dma->id, uc->needs_epib,
+ uc->psd_size, uc->metadata_size,
+ uc->slave_thread_id);
+
+ return 0;
+}
+
+int udma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
+{
+ struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct cppi5_host_desc_t *desc_rx;
+ dma_addr_t dma_dst;
+ struct udma_chan *uc;
+ u32 desc_num;
+
+ if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) {
+ dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id);
+ return -EINVAL;
+ }
+ uc = &ud->channels[dma->id];
+
+ if (uc->dir != DMA_DEV_TO_MEM)
+ return -EINVAL;
+
+ if (uc->num_rx_bufs >= UDMA_RX_DESC_NUM)
+ return -EINVAL;
+
+ desc_num = uc->desc_rx_cur % UDMA_RX_DESC_NUM;
+ desc_rx = uc->desc_rx + (desc_num * uc->hdesc_size);
+ dma_dst = (dma_addr_t)dst;
+
+ cppi5_hdesc_reset_hbdesc(desc_rx);
+
+ cppi5_hdesc_init(desc_rx,
+ uc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_PRESENT : 0,
+ uc->psd_size);
+ cppi5_hdesc_set_pktlen(desc_rx, size);
+ cppi5_hdesc_attach_buf(desc_rx, dma_dst, size, dma_dst, size);
+
+ if (!udma_is_coherent(uc)) {
+ flush_dcache_range((u64)desc_rx,
+ ALIGN((u64)desc_rx + uc->hdesc_size,
+ ARCH_DMA_MINALIGN));
+ }
+
+ k3_nav_ringacc_ring_push(uc->rchan->fd_ring, &desc_rx);
+
+ uc->num_rx_bufs++;
+ uc->desc_rx_cur++;
+
+ return 0;
+}
+
+static const struct dma_ops udma_ops = {
+ .transfer = udma_transfer,
+ .of_xlate = udma_of_xlate,
+ .request = udma_request,
+ .free = udma_free,
+ .enable = udma_enable,
+ .disable = udma_disable,
+ .send = udma_send,
+ .receive = udma_receive,
+ .prepare_rcv_buf = udma_prepare_rcv_buf,
+};
+
+static const struct udevice_id udma_ids[] = {
+ { .compatible = "ti,k3-navss-udmap" },
+ { }
+};
+
+U_BOOT_DRIVER(ti_edma3) = {
+ .name = "ti-udma",
+ .id = UCLASS_DMA,
+ .of_match = udma_ids,
+ .ops = &udma_ops,
+ .probe = udma_probe,
+ .priv_auto_alloc_size = sizeof(struct udma_dev),
+};
projects / u-boot.git / commitdiff