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- // 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 <cpu_func.h>
- #include <asm/io.h>
- #include <asm/bitops.h>
- #include <malloc.h>
- #include <linux/dma-mapping.h>
- #include <dm.h>
- #include <dm/device_compat.h>
- #include <dm/devres.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/bitmap.h>
- #include <linux/err.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
- #define K3_UDMA_MAX_RFLOWS 1024
- 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;
- };
- enum udma_rm_range {
- RM_RANGE_TCHAN = 0,
- RM_RANGE_RCHAN,
- RM_RANGE_RFLOW,
- RM_RANGE_LAST,
- };
- struct udma_tisci_rm {
- const struct ti_sci_handle *tisci;
- const struct ti_sci_rm_udmap_ops *tisci_udmap_ops;
- u32 tisci_dev_id;
- /* tisci information for PSI-L thread pairing/unpairing */
- const struct ti_sci_rm_psil_ops *tisci_psil_ops;
- u32 tisci_navss_dev_id;
- struct ti_sci_resource *rm_ranges[RM_RANGE_LAST];
- };
- struct udma_dev {
- struct udevice *dev;
- void __iomem *mmrs[MMR_LAST];
- struct udma_tisci_rm tisci_rm;
- 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;
- unsigned long *rflow_map_reserved;
- struct udma_tchan *tchans;
- struct udma_rchan *rchans;
- struct udma_rflow *rflows;
- struct udma_chan *channels;
- u32 psil_base;
- u32 ch_count;
- };
- struct udma_chan {
- struct udma_dev *ud;
- char name[20];
- struct udma_tchan *tchan;
- struct udma_rchan *rchan;
- struct udma_rflow *rflow;
- struct ti_udma_drv_chan_cfg_data cfg_data;
- 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)
- {
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- dst_thread |= UDMA_PSIL_DST_THREAD_ID_OFFSET;
- return tisci_rm->tisci_psil_ops->pair(tisci_rm->tisci,
- tisci_rm->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)
- {
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- dst_thread |= UDMA_PSIL_DST_THREAD_ID_OFFSET;
- return tisci_rm->tisci_psil_ops->unpair(tisci_rm->tisci,
- tisci_rm->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_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_tchanrt_read(uc->tchan,
- UDMA_TCHAN_RT_CTL_REG),
- udma_tchanrt_read(uc->tchan,
- 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++;
- }
- }
- static struct udma_rflow *__udma_reserve_rflow(struct udma_dev *ud, int id)
- {
- DECLARE_BITMAP(tmp, K3_UDMA_MAX_RFLOWS);
- if (id >= 0) {
- if (test_bit(id, ud->rflow_map)) {
- dev_err(ud->dev, "rflow%d is in use\n", id);
- return ERR_PTR(-ENOENT);
- }
- } else {
- bitmap_or(tmp, ud->rflow_map, ud->rflow_map_reserved,
- ud->rflow_cnt);
- id = find_next_zero_bit(tmp, ud->rflow_cnt, ud->rchan_cnt);
- if (id >= ud->rflow_cnt)
- return ERR_PTR(-ENOENT);
- }
- __set_bit(id, ud->rflow_map);
- return &ud->rflows[id];
- }
- #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);
- 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);
- 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);
- 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);
- 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_RING;
- 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_RING;
- 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;
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- 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 = tisci_rm->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 = tisci_rm->tisci_udmap_ops->tx_ch_cfg(tisci_rm->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 };
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- 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 = tisci_rm->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 = tisci_rm->tisci_udmap_ops->rx_ch_cfg(tisci_rm->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 = tisci_rm->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 = tisci_rm->tisci_udmap_ops->rx_flow_cfg(tisci_rm->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;
- }
- }
- if (udma_is_chan_running(uc)) {
- dev_warn(ud->dev, "chan%d: is running!\n", uc->id);
- udma_stop(uc);
- if (udma_is_chan_running(uc)) {
- dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
- 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;
- }
- static int udma_setup_resources(struct udma_dev *ud)
- {
- struct udevice *dev = ud->dev;
- int ch_count, i;
- u32 cap2, cap3;
- struct ti_sci_resource_desc *rm_desc;
- struct ti_sci_resource *rm_res;
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- static const char * const range_names[] = { "ti,sci-rm-range-tchan",
- "ti,sci-rm-range-rchan",
- "ti,sci-rm-range-rflow" };
- 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;
- ch_count = ud->tchan_cnt + ud->rchan_cnt;
- ud->tchan_map = devm_kmalloc_array(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_kmalloc_array(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_kmalloc_array(dev, BITS_TO_LONGS(ud->rflow_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->rflow_map_reserved = 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->tchan_map || !ud->rchan_map || !ud->rflow_map ||
- !ud->rflow_map_reserved || !ud->tchans || !ud->rchans ||
- !ud->rflows)
- return -ENOMEM;
- /*
- * RX flows with the same Ids as RX channels are reserved to be used
- * as default flows if remote HW can't generate flow_ids. Those
- * RX flows can be requested only explicitly by id.
- */
- bitmap_set(ud->rflow_map_reserved, 0, ud->rchan_cnt);
- /* Get resource ranges from tisci */
- for (i = 0; i < RM_RANGE_LAST; i++)
- tisci_rm->rm_ranges[i] =
- devm_ti_sci_get_of_resource(tisci_rm->tisci, dev,
- tisci_rm->tisci_dev_id,
- (char *)range_names[i]);
- /* tchan ranges */
- rm_res = tisci_rm->rm_ranges[RM_RANGE_TCHAN];
- if (IS_ERR(rm_res)) {
- bitmap_zero(ud->tchan_map, ud->tchan_cnt);
- } else {
- bitmap_fill(ud->tchan_map, ud->tchan_cnt);
- for (i = 0; i < rm_res->sets; i++) {
- rm_desc = &rm_res->desc[i];
- bitmap_clear(ud->tchan_map, rm_desc->start,
- rm_desc->num);
- }
- }
- /* rchan and matching default flow ranges */
- rm_res = tisci_rm->rm_ranges[RM_RANGE_RCHAN];
- if (IS_ERR(rm_res)) {
- bitmap_zero(ud->rchan_map, ud->rchan_cnt);
- bitmap_zero(ud->rflow_map, ud->rchan_cnt);
- } else {
- bitmap_fill(ud->rchan_map, ud->rchan_cnt);
- bitmap_fill(ud->rflow_map, ud->rchan_cnt);
- for (i = 0; i < rm_res->sets; i++) {
- rm_desc = &rm_res->desc[i];
- bitmap_clear(ud->rchan_map, rm_desc->start,
- rm_desc->num);
- bitmap_clear(ud->rflow_map, rm_desc->start,
- rm_desc->num);
- }
- }
- /* GP rflow ranges */
- rm_res = tisci_rm->rm_ranges[RM_RANGE_RFLOW];
- if (IS_ERR(rm_res)) {
- bitmap_clear(ud->rflow_map, ud->rchan_cnt,
- ud->rflow_cnt - ud->rchan_cnt);
- } else {
- bitmap_set(ud->rflow_map, ud->rchan_cnt,
- ud->rflow_cnt - ud->rchan_cnt);
- for (i = 0; i < rm_res->sets; i++) {
- rm_desc = &rm_res->desc[i];
- bitmap_clear(ud->rflow_map, rm_desc->start,
- rm_desc->num);
- }
- }
- ch_count -= bitmap_weight(ud->tchan_map, ud->tchan_cnt);
- ch_count -= bitmap_weight(ud->rchan_map, ud->rchan_cnt);
- if (!ch_count)
- return -ENODEV;
- ud->channels = devm_kcalloc(dev, ch_count, sizeof(*ud->channels),
- GFP_KERNEL);
- if (!ud->channels)
- return -ENOMEM;
- dev_info(dev,
- "Channels: %d (tchan: %u, echan: %u, rchan: %u, rflow: %u)\n",
- ch_count, ud->tchan_cnt, ud->echan_cnt, ud->rchan_cnt,
- ud->rflow_cnt);
- return ch_count;
- }
- 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;
- struct udevice *tmp;
- struct udevice *tisci_dev = NULL;
- struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
- ofnode navss_ofnode = ofnode_get_parent(dev_ofnode(dev));
- 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_phandle(UCLASS_FIRMWARE, dev,
- "ti,sci", &tisci_dev);
- if (ret) {
- debug("Failed to get TISCI phandle (%d)\n", ret);
- tisci_rm->tisci = NULL;
- return -EINVAL;
- }
- tisci_rm->tisci = (struct ti_sci_handle *)
- (ti_sci_get_handle_from_sysfw(tisci_dev));
- tisci_rm->tisci_dev_id = -1;
- ret = dev_read_u32(dev, "ti,sci-dev-id", &tisci_rm->tisci_dev_id);
- if (ret) {
- dev_err(dev, "ti,sci-dev-id read failure %d\n", ret);
- return ret;
- }
- tisci_rm->tisci_navss_dev_id = -1;
- ret = ofnode_read_u32(navss_ofnode, "ti,sci-dev-id",
- &tisci_rm->tisci_navss_dev_id);
- if (ret) {
- dev_err(dev, "navss sci-dev-id read failure %d\n", ret);
- return ret;
- }
- tisci_rm->tisci_udmap_ops = &tisci_rm->tisci->ops.rm_udmap_ops;
- tisci_rm->tisci_psil_ops = &tisci_rm->tisci->ops.rm_psil_ops;
- ud->dev = dev;
- ud->ch_count = udma_setup_resources(ud);
- if (ud->ch_count <= 0)
- return ud->ch_count;
- 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,
- tisci_rm->tisci_dev_id);
- dev_info(dev, "Number of rflows: %u\n", ud->rflow_cnt);
- 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_push_to_ring(struct k3_nav_ring *ring, void *elem)
- {
- u64 addr = 0;
- memcpy(&addr, &elem, sizeof(elem));
- return k3_nav_ringacc_ring_push(ring, &addr);
- }
- 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);
- flush_dcache_range((unsigned long)tr_desc,
- ALIGN((unsigned long)tr_desc + desc_size,
- ARCH_DMA_MINALIGN));
- udma_push_to_ring(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;
- if (uc->dir == DMA_DEV_TO_MEM) {
- uc->cfg_data.flow_id_base = uc->rflow->id;
- uc->cfg_data.flow_id_cnt = 1;
- }
- return 0;
- }
- static int udma_rfree(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);
- flush_dcache_range((unsigned long)dma_src,
- ALIGN((unsigned long)dma_src + len,
- ARCH_DMA_MINALIGN));
- flush_dcache_range((unsigned long)desc_tx,
- ALIGN((unsigned long)desc_tx + uc->hdesc_size,
- ARCH_DMA_MINALIGN));
- ret = udma_push_to_ring(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 */
- 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 */
- 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);
- flush_dcache_range((unsigned long)desc_rx,
- ALIGN((unsigned long)desc_rx + uc->hdesc_size,
- ARCH_DMA_MINALIGN));
- udma_push_to_ring(uc->rchan->fd_ring, desc_rx);
- uc->num_rx_bufs++;
- uc->desc_rx_cur++;
- return 0;
- }
- static int udma_get_cfg(struct dma *dma, u32 id, void **data)
- {
- 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;
- }
- switch (id) {
- case TI_UDMA_CHAN_PRIV_INFO:
- uc = &ud->channels[dma->id];
- *data = &uc->cfg_data;
- return 0;
- }
- return -EINVAL;
- }
- static const struct dma_ops udma_ops = {
- .transfer = udma_transfer,
- .of_xlate = udma_of_xlate,
- .request = udma_request,
- .rfree = udma_rfree,
- .enable = udma_enable,
- .disable = udma_disable,
- .send = udma_send,
- .receive = udma_receive,
- .prepare_rcv_buf = udma_prepare_rcv_buf,
- .get_cfg = udma_get_cfg,
- };
- static const struct udevice_id udma_ids[] = {
- { .compatible = "ti,k3-navss-udmap" },
- { .compatible = "ti,j721e-navss-mcu-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),
- };
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