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OpenCloudOS-Kernel/drivers/dma/ti/k3-udma-glue.c

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// SPDX-License-Identifier: GPL-2.0
/*
* K3 NAVSS DMA glue interface
*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
*
*/
#include <linux/atomic.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/soc/ti/k3-ringacc.h>
#include <linux/dma/ti-cppi5.h>
#include <linux/dma/k3-udma-glue.h>
#include "k3-udma.h"
#include "k3-psil-priv.h"
struct k3_udma_glue_common {
struct device *dev;
struct udma_dev *udmax;
const struct udma_tisci_rm *tisci_rm;
struct k3_ringacc *ringacc;
u32 src_thread;
u32 dst_thread;
u32 hdesc_size;
bool epib;
u32 psdata_size;
u32 swdata_size;
u32 atype;
};
struct k3_udma_glue_tx_channel {
struct k3_udma_glue_common common;
struct udma_tchan *udma_tchanx;
int udma_tchan_id;
struct k3_ring *ringtx;
struct k3_ring *ringtxcq;
bool psil_paired;
int virq;
atomic_t free_pkts;
bool tx_pause_on_err;
bool tx_filt_einfo;
bool tx_filt_pswords;
bool tx_supr_tdpkt;
};
struct k3_udma_glue_rx_flow {
struct udma_rflow *udma_rflow;
int udma_rflow_id;
struct k3_ring *ringrx;
struct k3_ring *ringrxfdq;
int virq;
};
struct k3_udma_glue_rx_channel {
struct k3_udma_glue_common common;
struct udma_rchan *udma_rchanx;
int udma_rchan_id;
bool remote;
bool psil_paired;
u32 swdata_size;
int flow_id_base;
struct k3_udma_glue_rx_flow *flows;
u32 flow_num;
u32 flows_ready;
};
#define K3_UDMAX_TDOWN_TIMEOUT_US 1000
static int of_k3_udma_glue_parse(struct device_node *udmax_np,
struct k3_udma_glue_common *common)
{
common->ringacc = of_k3_ringacc_get_by_phandle(udmax_np,
"ti,ringacc");
if (IS_ERR(common->ringacc))
return PTR_ERR(common->ringacc);
common->udmax = of_xudma_dev_get(udmax_np, NULL);
if (IS_ERR(common->udmax))
return PTR_ERR(common->udmax);
common->tisci_rm = xudma_dev_get_tisci_rm(common->udmax);
return 0;
}
static int of_k3_udma_glue_parse_chn(struct device_node *chn_np,
const char *name, struct k3_udma_glue_common *common,
bool tx_chn)
{
struct psil_endpoint_config *ep_config;
struct of_phandle_args dma_spec;
u32 thread_id;
int ret = 0;
int index;
if (unlikely(!name))
return -EINVAL;
index = of_property_match_string(chn_np, "dma-names", name);
if (index < 0)
return index;
if (of_parse_phandle_with_args(chn_np, "dmas", "#dma-cells", index,
&dma_spec))
return -ENOENT;
thread_id = dma_spec.args[0];
if (dma_spec.args_count == 2) {
if (dma_spec.args[1] > 2) {
dev_err(common->dev, "Invalid channel atype: %u\n",
dma_spec.args[1]);
ret = -EINVAL;
goto out_put_spec;
}
common->atype = dma_spec.args[1];
}
if (tx_chn && !(thread_id & K3_PSIL_DST_THREAD_ID_OFFSET)) {
ret = -EINVAL;
goto out_put_spec;
}
if (!tx_chn && (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET)) {
ret = -EINVAL;
goto out_put_spec;
}
/* get psil endpoint config */
ep_config = psil_get_ep_config(thread_id);
if (IS_ERR(ep_config)) {
dev_err(common->dev,
"No configuration for psi-l thread 0x%04x\n",
thread_id);
ret = PTR_ERR(ep_config);
goto out_put_spec;
}
common->epib = ep_config->needs_epib;
common->psdata_size = ep_config->psd_size;
if (tx_chn)
common->dst_thread = thread_id;
else
common->src_thread = thread_id;
ret = of_k3_udma_glue_parse(dma_spec.np, common);
out_put_spec:
of_node_put(dma_spec.np);
return ret;
};
static void k3_udma_glue_dump_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
{
struct device *dev = tx_chn->common.dev;
dev_dbg(dev, "dump_tx_chn:\n"
"udma_tchan_id: %d\n"
"src_thread: %08x\n"
"dst_thread: %08x\n",
tx_chn->udma_tchan_id,
tx_chn->common.src_thread,
tx_chn->common.dst_thread);
}
static void k3_udma_glue_dump_tx_rt_chn(struct k3_udma_glue_tx_channel *chn,
char *mark)
{
struct device *dev = chn->common.dev;
dev_dbg(dev, "=== dump ===> %s\n", mark);
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_CTL_REG,
xudma_tchanrt_read(chn->udma_tchanx, UDMA_CHAN_RT_CTL_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_PEER_RT_EN_REG,
xudma_tchanrt_read(chn->udma_tchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_PCNT_REG,
xudma_tchanrt_read(chn->udma_tchanx, UDMA_CHAN_RT_PCNT_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_BCNT_REG,
xudma_tchanrt_read(chn->udma_tchanx, UDMA_CHAN_RT_BCNT_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_SBCNT_REG,
xudma_tchanrt_read(chn->udma_tchanx, UDMA_CHAN_RT_SBCNT_REG));
}
static int k3_udma_glue_cfg_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
{
const struct udma_tisci_rm *tisci_rm = tx_chn->common.tisci_rm;
struct ti_sci_msg_rm_udmap_tx_ch_cfg req;
memset(&req, 0, sizeof(req));
req.valid_params = TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_EINFO_VALID |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_PSWORDS_VALID |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID |
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_ATYPE_VALID;
req.nav_id = tisci_rm->tisci_dev_id;
req.index = tx_chn->udma_tchan_id;
if (tx_chn->tx_pause_on_err)
req.tx_pause_on_err = 1;
if (tx_chn->tx_filt_einfo)
req.tx_filt_einfo = 1;
if (tx_chn->tx_filt_pswords)
req.tx_filt_pswords = 1;
req.tx_chan_type = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
if (tx_chn->tx_supr_tdpkt)
req.tx_supr_tdpkt = 1;
req.tx_fetch_size = tx_chn->common.hdesc_size >> 2;
req.txcq_qnum = k3_ringacc_get_ring_id(tx_chn->ringtxcq);
req.tx_atype = tx_chn->common.atype;
return tisci_rm->tisci_udmap_ops->tx_ch_cfg(tisci_rm->tisci, &req);
}
struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev,
const char *name, struct k3_udma_glue_tx_channel_cfg *cfg)
{
struct k3_udma_glue_tx_channel *tx_chn;
int ret;
tx_chn = devm_kzalloc(dev, sizeof(*tx_chn), GFP_KERNEL);
if (!tx_chn)
return ERR_PTR(-ENOMEM);
tx_chn->common.dev = dev;
tx_chn->common.swdata_size = cfg->swdata_size;
tx_chn->tx_pause_on_err = cfg->tx_pause_on_err;
tx_chn->tx_filt_einfo = cfg->tx_filt_einfo;
tx_chn->tx_filt_pswords = cfg->tx_filt_pswords;
tx_chn->tx_supr_tdpkt = cfg->tx_supr_tdpkt;
/* parse of udmap channel */
ret = of_k3_udma_glue_parse_chn(dev->of_node, name,
&tx_chn->common, true);
if (ret)
goto err;
tx_chn->common.hdesc_size = cppi5_hdesc_calc_size(tx_chn->common.epib,
tx_chn->common.psdata_size,
tx_chn->common.swdata_size);
/* request and cfg UDMAP TX channel */
tx_chn->udma_tchanx = xudma_tchan_get(tx_chn->common.udmax, -1);
if (IS_ERR(tx_chn->udma_tchanx)) {
ret = PTR_ERR(tx_chn->udma_tchanx);
dev_err(dev, "UDMAX tchanx get err %d\n", ret);
goto err;
}
tx_chn->udma_tchan_id = xudma_tchan_get_id(tx_chn->udma_tchanx);
atomic_set(&tx_chn->free_pkts, cfg->txcq_cfg.size);
/* request and cfg rings */
ret = k3_ringacc_request_rings_pair(tx_chn->common.ringacc,
tx_chn->udma_tchan_id, -1,
&tx_chn->ringtx,
&tx_chn->ringtxcq);
if (ret) {
dev_err(dev, "Failed to get TX/TXCQ rings %d\n", ret);
goto err;
}
ret = k3_ringacc_ring_cfg(tx_chn->ringtx, &cfg->tx_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringtx %d\n", ret);
goto err;
}
ret = k3_ringacc_ring_cfg(tx_chn->ringtxcq, &cfg->txcq_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringtx %d\n", ret);
goto err;
}
/* request and cfg psi-l */
tx_chn->common.src_thread =
xudma_dev_get_psil_base(tx_chn->common.udmax) +
tx_chn->udma_tchan_id;
ret = k3_udma_glue_cfg_tx_chn(tx_chn);
if (ret) {
dev_err(dev, "Failed to cfg tchan %d\n", ret);
goto err;
}
ret = xudma_navss_psil_pair(tx_chn->common.udmax,
tx_chn->common.src_thread,
tx_chn->common.dst_thread);
if (ret) {
dev_err(dev, "PSI-L request err %d\n", ret);
goto err;
}
tx_chn->psil_paired = true;
/* reset TX RT registers */
k3_udma_glue_disable_tx_chn(tx_chn);
k3_udma_glue_dump_tx_chn(tx_chn);
return tx_chn;
err:
k3_udma_glue_release_tx_chn(tx_chn);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_request_tx_chn);
void k3_udma_glue_release_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
{
if (tx_chn->psil_paired) {
xudma_navss_psil_unpair(tx_chn->common.udmax,
tx_chn->common.src_thread,
tx_chn->common.dst_thread);
tx_chn->psil_paired = false;
}
if (!IS_ERR_OR_NULL(tx_chn->udma_tchanx))
xudma_tchan_put(tx_chn->common.udmax,
tx_chn->udma_tchanx);
if (tx_chn->ringtxcq)
k3_ringacc_ring_free(tx_chn->ringtxcq);
if (tx_chn->ringtx)
k3_ringacc_ring_free(tx_chn->ringtx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_release_tx_chn);
int k3_udma_glue_push_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
struct cppi5_host_desc_t *desc_tx,
dma_addr_t desc_dma)
{
u32 ringtxcq_id;
if (!atomic_add_unless(&tx_chn->free_pkts, -1, 0))
return -ENOMEM;
ringtxcq_id = k3_ringacc_get_ring_id(tx_chn->ringtxcq);
cppi5_desc_set_retpolicy(&desc_tx->hdr, 0, ringtxcq_id);
return k3_ringacc_ring_push(tx_chn->ringtx, &desc_dma);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_push_tx_chn);
int k3_udma_glue_pop_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
dma_addr_t *desc_dma)
{
int ret;
ret = k3_ringacc_ring_pop(tx_chn->ringtxcq, desc_dma);
if (!ret)
atomic_inc(&tx_chn->free_pkts);
return ret;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_pop_tx_chn);
int k3_udma_glue_enable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
{
xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_PEER_RT_EN_REG,
UDMA_PEER_RT_EN_ENABLE);
xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_CTL_REG,
UDMA_CHAN_RT_CTL_EN);
k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn en");
return 0;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_enable_tx_chn);
void k3_udma_glue_disable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
{
k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn dis1");
xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_CTL_REG, 0);
xudma_tchanrt_write(tx_chn->udma_tchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG, 0);
k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn dis2");
}
EXPORT_SYMBOL_GPL(k3_udma_glue_disable_tx_chn);
void k3_udma_glue_tdown_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
bool sync)
{
int i = 0;
u32 val;
k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn tdown1");
xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_CTL_REG,
UDMA_CHAN_RT_CTL_EN | UDMA_CHAN_RT_CTL_TDOWN);
val = xudma_tchanrt_read(tx_chn->udma_tchanx, UDMA_CHAN_RT_CTL_REG);
while (sync && (val & UDMA_CHAN_RT_CTL_EN)) {
val = xudma_tchanrt_read(tx_chn->udma_tchanx,
UDMA_CHAN_RT_CTL_REG);
udelay(1);
if (i > K3_UDMAX_TDOWN_TIMEOUT_US) {
dev_err(tx_chn->common.dev, "TX tdown timeout\n");
break;
}
i++;
}
val = xudma_tchanrt_read(tx_chn->udma_tchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG);
if (sync && (val & UDMA_PEER_RT_EN_ENABLE))
dev_err(tx_chn->common.dev, "TX tdown peer not stopped\n");
k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn tdown2");
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tdown_tx_chn);
void k3_udma_glue_reset_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
void *data,
void (*cleanup)(void *data, dma_addr_t desc_dma))
{
dma_addr_t desc_dma;
int occ_tx, i, ret;
/* reset TXCQ as it is not input for udma - expected to be empty */
if (tx_chn->ringtxcq)
k3_ringacc_ring_reset(tx_chn->ringtxcq);
/*
* TXQ reset need to be special way as it is input for udma and its
* state cached by udma, so:
* 1) save TXQ occ
* 2) clean up TXQ and call callback .cleanup() for each desc
* 3) reset TXQ in a special way
*/
occ_tx = k3_ringacc_ring_get_occ(tx_chn->ringtx);
dev_dbg(tx_chn->common.dev, "TX reset occ_tx %u\n", occ_tx);
for (i = 0; i < occ_tx; i++) {
ret = k3_ringacc_ring_pop(tx_chn->ringtx, &desc_dma);
if (ret) {
dev_err(tx_chn->common.dev, "TX reset pop %d\n", ret);
break;
}
cleanup(data, desc_dma);
}
k3_ringacc_ring_reset_dma(tx_chn->ringtx, occ_tx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_reset_tx_chn);
u32 k3_udma_glue_tx_get_hdesc_size(struct k3_udma_glue_tx_channel *tx_chn)
{
return tx_chn->common.hdesc_size;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_hdesc_size);
u32 k3_udma_glue_tx_get_txcq_id(struct k3_udma_glue_tx_channel *tx_chn)
{
return k3_ringacc_get_ring_id(tx_chn->ringtxcq);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_txcq_id);
int k3_udma_glue_tx_get_irq(struct k3_udma_glue_tx_channel *tx_chn)
{
tx_chn->virq = k3_ringacc_get_ring_irq_num(tx_chn->ringtxcq);
return tx_chn->virq;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_irq);
static int k3_udma_glue_cfg_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
{
const struct udma_tisci_rm *tisci_rm = rx_chn->common.tisci_rm;
struct ti_sci_msg_rm_udmap_rx_ch_cfg req;
int ret;
memset(&req, 0, sizeof(req));
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 |
TI_SCI_MSG_VALUE_RM_UDMAP_CH_ATYPE_VALID;
req.nav_id = tisci_rm->tisci_dev_id;
req.index = rx_chn->udma_rchan_id;
req.rx_fetch_size = rx_chn->common.hdesc_size >> 2;
/*
* TODO: we can't support rxcq_qnum/RCHAN[a]_RCQ cfg with current sysfw
* and udmax impl, so just configure it to invalid value.
* req.rxcq_qnum = k3_ringacc_get_ring_id(rx_chn->flows[0].ringrx);
*/
req.rxcq_qnum = 0xFFFF;
if (rx_chn->flow_num && rx_chn->flow_id_base != rx_chn->udma_rchan_id) {
/* Default flow + extra ones */
req.flowid_start = rx_chn->flow_id_base;
req.flowid_cnt = rx_chn->flow_num;
}
req.rx_chan_type = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
req.rx_atype = rx_chn->common.atype;
ret = tisci_rm->tisci_udmap_ops->rx_ch_cfg(tisci_rm->tisci, &req);
if (ret)
dev_err(rx_chn->common.dev, "rchan%d cfg failed %d\n",
rx_chn->udma_rchan_id, ret);
return ret;
}
static void k3_udma_glue_release_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_num)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_num];
if (IS_ERR_OR_NULL(flow->udma_rflow))
return;
if (flow->ringrxfdq)
k3_ringacc_ring_free(flow->ringrxfdq);
if (flow->ringrx)
k3_ringacc_ring_free(flow->ringrx);
xudma_rflow_put(rx_chn->common.udmax, flow->udma_rflow);
flow->udma_rflow = NULL;
rx_chn->flows_ready--;
}
static int k3_udma_glue_cfg_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx,
struct k3_udma_glue_rx_flow_cfg *flow_cfg)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_idx];
const struct udma_tisci_rm *tisci_rm = rx_chn->common.tisci_rm;
struct device *dev = rx_chn->common.dev;
struct ti_sci_msg_rm_udmap_flow_cfg req;
int rx_ring_id;
int rx_ringfdq_id;
int ret = 0;
flow->udma_rflow = xudma_rflow_get(rx_chn->common.udmax,
flow->udma_rflow_id);
if (IS_ERR(flow->udma_rflow)) {
ret = PTR_ERR(flow->udma_rflow);
dev_err(dev, "UDMAX rflow get err %d\n", ret);
return ret;
}
if (flow->udma_rflow_id != xudma_rflow_get_id(flow->udma_rflow)) {
ret = -ENODEV;
goto err_rflow_put;
}
/* request and cfg rings */
ret = k3_ringacc_request_rings_pair(rx_chn->common.ringacc,
flow_cfg->ring_rxfdq0_id,
flow_cfg->ring_rxq_id,
&flow->ringrxfdq,
&flow->ringrx);
if (ret) {
dev_err(dev, "Failed to get RX/RXFDQ rings %d\n", ret);
goto err_rflow_put;
}
ret = k3_ringacc_ring_cfg(flow->ringrx, &flow_cfg->rx_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringrx %d\n", ret);
goto err_ringrxfdq_free;
}
ret = k3_ringacc_ring_cfg(flow->ringrxfdq, &flow_cfg->rxfdq_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringrxfdq %d\n", ret);
goto err_ringrxfdq_free;
}
if (rx_chn->remote) {
rx_ring_id = TI_SCI_RESOURCE_NULL;
rx_ringfdq_id = TI_SCI_RESOURCE_NULL;
} else {
rx_ring_id = k3_ringacc_get_ring_id(flow->ringrx);
rx_ringfdq_id = k3_ringacc_get_ring_id(flow->ringrxfdq);
}
memset(&req, 0, sizeof(req));
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;
req.nav_id = tisci_rm->tisci_dev_id;
req.flow_index = flow->udma_rflow_id;
if (rx_chn->common.epib)
req.rx_einfo_present = 1;
if (rx_chn->common.psdata_size)
req.rx_psinfo_present = 1;
if (flow_cfg->rx_error_handling)
req.rx_error_handling = 1;
req.rx_desc_type = 0;
req.rx_dest_qnum = rx_ring_id;
req.rx_src_tag_hi_sel = 0;
req.rx_src_tag_lo_sel = flow_cfg->src_tag_lo_sel;
req.rx_dest_tag_hi_sel = 0;
req.rx_dest_tag_lo_sel = 0;
req.rx_fdq0_sz0_qnum = rx_ringfdq_id;
req.rx_fdq1_qnum = rx_ringfdq_id;
req.rx_fdq2_qnum = rx_ringfdq_id;
req.rx_fdq3_qnum = rx_ringfdq_id;
ret = tisci_rm->tisci_udmap_ops->rx_flow_cfg(tisci_rm->tisci, &req);
if (ret) {
dev_err(dev, "flow%d config failed: %d\n", flow->udma_rflow_id,
ret);
goto err_ringrxfdq_free;
}
rx_chn->flows_ready++;
dev_dbg(dev, "flow%d config done. ready:%d\n",
flow->udma_rflow_id, rx_chn->flows_ready);
return 0;
err_ringrxfdq_free:
k3_ringacc_ring_free(flow->ringrxfdq);
k3_ringacc_ring_free(flow->ringrx);
err_rflow_put:
xudma_rflow_put(rx_chn->common.udmax, flow->udma_rflow);
flow->udma_rflow = NULL;
return ret;
}
static void k3_udma_glue_dump_rx_chn(struct k3_udma_glue_rx_channel *chn)
{
struct device *dev = chn->common.dev;
dev_dbg(dev, "dump_rx_chn:\n"
"udma_rchan_id: %d\n"
"src_thread: %08x\n"
"dst_thread: %08x\n"
"epib: %d\n"
"hdesc_size: %u\n"
"psdata_size: %u\n"
"swdata_size: %u\n"
"flow_id_base: %d\n"
"flow_num: %d\n",
chn->udma_rchan_id,
chn->common.src_thread,
chn->common.dst_thread,
chn->common.epib,
chn->common.hdesc_size,
chn->common.psdata_size,
chn->common.swdata_size,
chn->flow_id_base,
chn->flow_num);
}
static void k3_udma_glue_dump_rx_rt_chn(struct k3_udma_glue_rx_channel *chn,
char *mark)
{
struct device *dev = chn->common.dev;
dev_dbg(dev, "=== dump ===> %s\n", mark);
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_CTL_REG,
xudma_rchanrt_read(chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_PEER_RT_EN_REG,
xudma_rchanrt_read(chn->udma_rchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_PCNT_REG,
xudma_rchanrt_read(chn->udma_rchanx, UDMA_CHAN_RT_PCNT_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_BCNT_REG,
xudma_rchanrt_read(chn->udma_rchanx, UDMA_CHAN_RT_BCNT_REG));
dev_dbg(dev, "0x%08X: %08X\n", UDMA_CHAN_RT_SBCNT_REG,
xudma_rchanrt_read(chn->udma_rchanx, UDMA_CHAN_RT_SBCNT_REG));
}
static int
k3_udma_glue_allocate_rx_flows(struct k3_udma_glue_rx_channel *rx_chn,
struct k3_udma_glue_rx_channel_cfg *cfg)
{
int ret;
/* default rflow */
if (cfg->flow_id_use_rxchan_id)
return 0;
/* not a GP rflows */
if (rx_chn->flow_id_base != -1 &&
!xudma_rflow_is_gp(rx_chn->common.udmax, rx_chn->flow_id_base))
return 0;
/* Allocate range of GP rflows */
ret = xudma_alloc_gp_rflow_range(rx_chn->common.udmax,
rx_chn->flow_id_base,
rx_chn->flow_num);
if (ret < 0) {
dev_err(rx_chn->common.dev, "UDMAX reserve_rflow %d cnt:%d err: %d\n",
rx_chn->flow_id_base, rx_chn->flow_num, ret);
return ret;
}
rx_chn->flow_id_base = ret;
return 0;
}
static struct k3_udma_glue_rx_channel *
k3_udma_glue_request_rx_chn_priv(struct device *dev, const char *name,
struct k3_udma_glue_rx_channel_cfg *cfg)
{
struct k3_udma_glue_rx_channel *rx_chn;
int ret, i;
if (cfg->flow_id_num <= 0)
return ERR_PTR(-EINVAL);
if (cfg->flow_id_num != 1 &&
(cfg->def_flow_cfg || cfg->flow_id_use_rxchan_id))
return ERR_PTR(-EINVAL);
rx_chn = devm_kzalloc(dev, sizeof(*rx_chn), GFP_KERNEL);
if (!rx_chn)
return ERR_PTR(-ENOMEM);
rx_chn->common.dev = dev;
rx_chn->common.swdata_size = cfg->swdata_size;
rx_chn->remote = false;
/* parse of udmap channel */
ret = of_k3_udma_glue_parse_chn(dev->of_node, name,
&rx_chn->common, false);
if (ret)
goto err;
rx_chn->common.hdesc_size = cppi5_hdesc_calc_size(rx_chn->common.epib,
rx_chn->common.psdata_size,
rx_chn->common.swdata_size);
/* request and cfg UDMAP RX channel */
rx_chn->udma_rchanx = xudma_rchan_get(rx_chn->common.udmax, -1);
if (IS_ERR(rx_chn->udma_rchanx)) {
ret = PTR_ERR(rx_chn->udma_rchanx);
dev_err(dev, "UDMAX rchanx get err %d\n", ret);
goto err;
}
rx_chn->udma_rchan_id = xudma_rchan_get_id(rx_chn->udma_rchanx);
rx_chn->flow_num = cfg->flow_id_num;
rx_chn->flow_id_base = cfg->flow_id_base;
/* Use RX channel id as flow id: target dev can't generate flow_id */
if (cfg->flow_id_use_rxchan_id)
rx_chn->flow_id_base = rx_chn->udma_rchan_id;
rx_chn->flows = devm_kcalloc(dev, rx_chn->flow_num,
sizeof(*rx_chn->flows), GFP_KERNEL);
if (!rx_chn->flows) {
ret = -ENOMEM;
goto err;
}
ret = k3_udma_glue_allocate_rx_flows(rx_chn, cfg);
if (ret)
goto err;
for (i = 0; i < rx_chn->flow_num; i++)
rx_chn->flows[i].udma_rflow_id = rx_chn->flow_id_base + i;
/* request and cfg psi-l */
rx_chn->common.dst_thread =
xudma_dev_get_psil_base(rx_chn->common.udmax) +
rx_chn->udma_rchan_id;
ret = k3_udma_glue_cfg_rx_chn(rx_chn);
if (ret) {
dev_err(dev, "Failed to cfg rchan %d\n", ret);
goto err;
}
/* init default RX flow only if flow_num = 1 */
if (cfg->def_flow_cfg) {
ret = k3_udma_glue_cfg_rx_flow(rx_chn, 0, cfg->def_flow_cfg);
if (ret)
goto err;
}
ret = xudma_navss_psil_pair(rx_chn->common.udmax,
rx_chn->common.src_thread,
rx_chn->common.dst_thread);
if (ret) {
dev_err(dev, "PSI-L request err %d\n", ret);
goto err;
}
rx_chn->psil_paired = true;
/* reset RX RT registers */
k3_udma_glue_disable_rx_chn(rx_chn);
k3_udma_glue_dump_rx_chn(rx_chn);
return rx_chn;
err:
k3_udma_glue_release_rx_chn(rx_chn);
return ERR_PTR(ret);
}
static struct k3_udma_glue_rx_channel *
k3_udma_glue_request_remote_rx_chn(struct device *dev, const char *name,
struct k3_udma_glue_rx_channel_cfg *cfg)
{
struct k3_udma_glue_rx_channel *rx_chn;
int ret, i;
if (cfg->flow_id_num <= 0 ||
cfg->flow_id_use_rxchan_id ||
cfg->def_flow_cfg ||
cfg->flow_id_base < 0)
return ERR_PTR(-EINVAL);
/*
* Remote RX channel is under control of Remote CPU core, so
* Linux can only request and manipulate by dedicated RX flows
*/
rx_chn = devm_kzalloc(dev, sizeof(*rx_chn), GFP_KERNEL);
if (!rx_chn)
return ERR_PTR(-ENOMEM);
rx_chn->common.dev = dev;
rx_chn->common.swdata_size = cfg->swdata_size;
rx_chn->remote = true;
rx_chn->udma_rchan_id = -1;
rx_chn->flow_num = cfg->flow_id_num;
rx_chn->flow_id_base = cfg->flow_id_base;
rx_chn->psil_paired = false;
/* parse of udmap channel */
ret = of_k3_udma_glue_parse_chn(dev->of_node, name,
&rx_chn->common, false);
if (ret)
goto err;
rx_chn->common.hdesc_size = cppi5_hdesc_calc_size(rx_chn->common.epib,
rx_chn->common.psdata_size,
rx_chn->common.swdata_size);
rx_chn->flows = devm_kcalloc(dev, rx_chn->flow_num,
sizeof(*rx_chn->flows), GFP_KERNEL);
if (!rx_chn->flows) {
ret = -ENOMEM;
goto err;
}
ret = k3_udma_glue_allocate_rx_flows(rx_chn, cfg);
if (ret)
goto err;
for (i = 0; i < rx_chn->flow_num; i++)
rx_chn->flows[i].udma_rflow_id = rx_chn->flow_id_base + i;
k3_udma_glue_dump_rx_chn(rx_chn);
return rx_chn;
err:
k3_udma_glue_release_rx_chn(rx_chn);
return ERR_PTR(ret);
}
struct k3_udma_glue_rx_channel *
k3_udma_glue_request_rx_chn(struct device *dev, const char *name,
struct k3_udma_glue_rx_channel_cfg *cfg)
{
if (cfg->remote)
return k3_udma_glue_request_remote_rx_chn(dev, name, cfg);
else
return k3_udma_glue_request_rx_chn_priv(dev, name, cfg);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_request_rx_chn);
void k3_udma_glue_release_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
{
int i;
if (IS_ERR_OR_NULL(rx_chn->common.udmax))
return;
if (rx_chn->psil_paired) {
xudma_navss_psil_unpair(rx_chn->common.udmax,
rx_chn->common.src_thread,
rx_chn->common.dst_thread);
rx_chn->psil_paired = false;
}
for (i = 0; i < rx_chn->flow_num; i++)
k3_udma_glue_release_rx_flow(rx_chn, i);
if (xudma_rflow_is_gp(rx_chn->common.udmax, rx_chn->flow_id_base))
xudma_free_gp_rflow_range(rx_chn->common.udmax,
rx_chn->flow_id_base,
rx_chn->flow_num);
if (!IS_ERR_OR_NULL(rx_chn->udma_rchanx))
xudma_rchan_put(rx_chn->common.udmax,
rx_chn->udma_rchanx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_release_rx_chn);
int k3_udma_glue_rx_flow_init(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx,
struct k3_udma_glue_rx_flow_cfg *flow_cfg)
{
if (flow_idx >= rx_chn->flow_num)
return -EINVAL;
return k3_udma_glue_cfg_rx_flow(rx_chn, flow_idx, flow_cfg);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_init);
u32 k3_udma_glue_rx_flow_get_fdq_id(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx)
{
struct k3_udma_glue_rx_flow *flow;
if (flow_idx >= rx_chn->flow_num)
return -EINVAL;
flow = &rx_chn->flows[flow_idx];
return k3_ringacc_get_ring_id(flow->ringrxfdq);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_get_fdq_id);
u32 k3_udma_glue_rx_get_flow_id_base(struct k3_udma_glue_rx_channel *rx_chn)
{
return rx_chn->flow_id_base;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_flow_id_base);
int k3_udma_glue_rx_flow_enable(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_idx];
const struct udma_tisci_rm *tisci_rm = rx_chn->common.tisci_rm;
struct device *dev = rx_chn->common.dev;
struct ti_sci_msg_rm_udmap_flow_cfg req;
int rx_ring_id;
int rx_ringfdq_id;
int ret = 0;
if (!rx_chn->remote)
return -EINVAL;
rx_ring_id = k3_ringacc_get_ring_id(flow->ringrx);
rx_ringfdq_id = k3_ringacc_get_ring_id(flow->ringrxfdq);
memset(&req, 0, sizeof(req));
req.valid_params =
TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_QNUM_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;
req.nav_id = tisci_rm->tisci_dev_id;
req.flow_index = flow->udma_rflow_id;
req.rx_dest_qnum = rx_ring_id;
req.rx_fdq0_sz0_qnum = rx_ringfdq_id;
req.rx_fdq1_qnum = rx_ringfdq_id;
req.rx_fdq2_qnum = rx_ringfdq_id;
req.rx_fdq3_qnum = rx_ringfdq_id;
ret = tisci_rm->tisci_udmap_ops->rx_flow_cfg(tisci_rm->tisci, &req);
if (ret) {
dev_err(dev, "flow%d enable failed: %d\n", flow->udma_rflow_id,
ret);
}
return ret;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_enable);
int k3_udma_glue_rx_flow_disable(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_idx];
const struct udma_tisci_rm *tisci_rm = rx_chn->common.tisci_rm;
struct device *dev = rx_chn->common.dev;
struct ti_sci_msg_rm_udmap_flow_cfg req;
int ret = 0;
if (!rx_chn->remote)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.valid_params =
TI_SCI_MSG_VALUE_RM_UDMAP_FLOW_DEST_QNUM_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;
req.nav_id = tisci_rm->tisci_dev_id;
req.flow_index = flow->udma_rflow_id;
req.rx_dest_qnum = TI_SCI_RESOURCE_NULL;
req.rx_fdq0_sz0_qnum = TI_SCI_RESOURCE_NULL;
req.rx_fdq1_qnum = TI_SCI_RESOURCE_NULL;
req.rx_fdq2_qnum = TI_SCI_RESOURCE_NULL;
req.rx_fdq3_qnum = TI_SCI_RESOURCE_NULL;
ret = tisci_rm->tisci_udmap_ops->rx_flow_cfg(tisci_rm->tisci, &req);
if (ret) {
dev_err(dev, "flow%d disable failed: %d\n", flow->udma_rflow_id,
ret);
}
return ret;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_disable);
int k3_udma_glue_enable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
{
if (rx_chn->remote)
return -EINVAL;
if (rx_chn->flows_ready < rx_chn->flow_num)
return -EINVAL;
xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG,
UDMA_CHAN_RT_CTL_EN);
xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_PEER_RT_EN_REG,
UDMA_PEER_RT_EN_ENABLE);
k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt en");
return 0;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_enable_rx_chn);
void k3_udma_glue_disable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
{
k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt dis1");
xudma_rchanrt_write(rx_chn->udma_rchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG, 0);
xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG, 0);
k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt dis2");
}
EXPORT_SYMBOL_GPL(k3_udma_glue_disable_rx_chn);
void k3_udma_glue_tdown_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
bool sync)
{
int i = 0;
u32 val;
if (rx_chn->remote)
return;
k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt tdown1");
xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_PEER_RT_EN_REG,
UDMA_PEER_RT_EN_ENABLE | UDMA_PEER_RT_EN_TEARDOWN);
val = xudma_rchanrt_read(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG);
while (sync && (val & UDMA_CHAN_RT_CTL_EN)) {
val = xudma_rchanrt_read(rx_chn->udma_rchanx,
UDMA_CHAN_RT_CTL_REG);
udelay(1);
if (i > K3_UDMAX_TDOWN_TIMEOUT_US) {
dev_err(rx_chn->common.dev, "RX tdown timeout\n");
break;
}
i++;
}
val = xudma_rchanrt_read(rx_chn->udma_rchanx,
UDMA_CHAN_RT_PEER_RT_EN_REG);
if (sync && (val & UDMA_PEER_RT_EN_ENABLE))
dev_err(rx_chn->common.dev, "TX tdown peer not stopped\n");
k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt tdown2");
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tdown_rx_chn);
void k3_udma_glue_reset_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_num, void *data,
void (*cleanup)(void *data, dma_addr_t desc_dma), bool skip_fdq)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_num];
struct device *dev = rx_chn->common.dev;
dma_addr_t desc_dma;
int occ_rx, i, ret;
/* reset RXCQ as it is not input for udma - expected to be empty */
occ_rx = k3_ringacc_ring_get_occ(flow->ringrx);
dev_dbg(dev, "RX reset flow %u occ_rx %u\n", flow_num, occ_rx);
if (flow->ringrx)
k3_ringacc_ring_reset(flow->ringrx);
/* Skip RX FDQ in case one FDQ is used for the set of flows */
if (skip_fdq)
return;
/*
* RX FDQ reset need to be special way as it is input for udma and its
* state cached by udma, so:
* 1) save RX FDQ occ
* 2) clean up RX FDQ and call callback .cleanup() for each desc
* 3) reset RX FDQ in a special way
*/
occ_rx = k3_ringacc_ring_get_occ(flow->ringrxfdq);
dev_dbg(dev, "RX reset flow %u occ_rx_fdq %u\n", flow_num, occ_rx);
for (i = 0; i < occ_rx; i++) {
ret = k3_ringacc_ring_pop(flow->ringrxfdq, &desc_dma);
if (ret) {
dev_err(dev, "RX reset pop %d\n", ret);
break;
}
cleanup(data, desc_dma);
}
k3_ringacc_ring_reset_dma(flow->ringrxfdq, occ_rx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_reset_rx_chn);
int k3_udma_glue_push_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_num, struct cppi5_host_desc_t *desc_rx,
dma_addr_t desc_dma)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_num];
return k3_ringacc_ring_push(flow->ringrxfdq, &desc_dma);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_push_rx_chn);
int k3_udma_glue_pop_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_num, dma_addr_t *desc_dma)
{
struct k3_udma_glue_rx_flow *flow = &rx_chn->flows[flow_num];
return k3_ringacc_ring_pop(flow->ringrx, desc_dma);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_pop_rx_chn);
int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_num)
{
struct k3_udma_glue_rx_flow *flow;
flow = &rx_chn->flows[flow_num];
flow->virq = k3_ringacc_get_ring_irq_num(flow->ringrx);
return flow->virq;
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_irq);
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