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u-boot/drivers/dma/ti/k3-udma.c
Lokesh Vutla 57b2712b2b dma: ti: k3-udma: Mark flow id as valid parameter for RX channel config 
When flow id is not marked as valid, sysfw reads the register value to
get the range of flow ids that are supported. Then compares the flow range
with the U-Boot's host id. This will definitely fail as board
configuration doesn't assign the full range to U-Boot's host id. In order
to work around this, mark the flow id as valid and pass range as 0.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2020-03-03 13:08:14 +05:30

1872 lines
45 KiB
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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 |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_START_VALID |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_CNT_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;
}
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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