[PATCH v3 20/20] dmaengine: ti: k3-udma-glue: Add support for K3 PKTDMA

Peter Ujfalusi
2020-12-08T09:06:08Z

From: Vignesh Raghavendra <vigneshr@ti.com>

This commit adds support for PKTDMA in k3-udma glue driver. Use new
psil_endpoint_config struct to get static data for a given channel or a
flow during setup. Make sure that the RX flows being mapped to a RX
channel is within the range of flows that is been allocated to that RX
channel.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
drivers/dma/ti/k3-udma-glue.c | 291 +++++++++++++++++++++++++++----
drivers/dma/ti/k3-udma-private.c | 24 +++
drivers/dma/ti/k3-udma.h | 4 +
include/linux/dma/k3-udma-glue.h | 8 +
4 files changed, 289 insertions(+), 38 deletions(-)

diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c
index e6ebcd98c02a..4fdd9f06b723 100644
--- a/drivers/dma/ti/k3-udma-glue.c
+++ b/drivers/dma/ti/k3-udma-glue.c
@@ -22,6 +22,7 @@

struct k3_udma_glue_common {
struct device *dev;
+ struct device chan_dev;
struct udma_dev *udmax;
const struct udma_tisci_rm *tisci_rm;
struct k3_ringacc *ringacc;
@@ -32,7 +33,8 @@ struct k3_udma_glue_common {
bool epib;
u32 psdata_size;
u32 swdata_size;
- u32 atype;
+ u32 atype_asel;
+ struct psil_endpoint_config *ep_config;
};

struct k3_udma_glue_tx_channel {
@@ -53,6 +55,8 @@ struct k3_udma_glue_tx_channel {
bool tx_filt_einfo;
bool tx_filt_pswords;
bool tx_supr_tdpkt;
+
+ int udma_tflow_id;
};

struct k3_udma_glue_rx_flow {
@@ -81,6 +85,16 @@ struct k3_udma_glue_rx_channel {
u32 flows_ready;
};

+static void k3_udma_chan_dev_release(struct device *dev)
+{
+ /* The struct containing the device is devm managed */
+}
+
+static struct class k3_udma_glue_devclass = {
+ .name = "k3_udma_glue_chan",
+ .dev_release = k3_udma_chan_dev_release,
+};
+
#define K3_UDMAX_TDOWN_TIMEOUT_US 1000

static int of_k3_udma_glue_parse(struct device_node *udmax_np,
@@ -100,7 +114,6 @@ 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;
@@ -117,15 +130,26 @@ static int of_k3_udma_glue_parse_chn(struct device_node *chn_np,
&dma_spec))
return -ENOENT;

+ ret = of_k3_udma_glue_parse(dma_spec.np, common);
+ if (ret)
+ goto out_put_spec;
+
thread_id = dma_spec.args[0];
if (dma_spec.args_count == 2) {
- if (dma_spec.args[1] > 2) {
+ if (dma_spec.args[1] > 2 && !xudma_is_pktdma(common->udmax)) {
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 (dma_spec.args[1] > 15 && xudma_is_pktdma(common->udmax)) {
+ dev_err(common->dev, "Invalid channel asel: %u\n",
+ dma_spec.args[1]);
+ ret = -EINVAL;
+ goto out_put_spec;
+ }
+
+ common->atype_asel = dma_spec.args[1];
}

if (tx_chn && !(thread_id & K3_PSIL_DST_THREAD_ID_OFFSET)) {
@@ -139,25 +163,23 @@ static int of_k3_udma_glue_parse_chn(struct device_node *chn_np,
}

/* get psil endpoint config */
- ep_config = psil_get_ep_config(thread_id);
- if (IS_ERR(ep_config)) {
+ common->ep_config = psil_get_ep_config(thread_id);
+ if (IS_ERR(common->ep_config)) {
dev_err(common->dev,
"No configuration for psi-l thread 0x%04x\n",
thread_id);
- ret = PTR_ERR(ep_config);
+ ret = PTR_ERR(common->ep_config);
goto out_put_spec;
}

- common->epib = ep_config->needs_epib;
- common->psdata_size = ep_config->psd_size;
+ common->epib = common->ep_config->needs_epib;
+ common->psdata_size = common->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;
@@ -223,7 +245,7 @@ static int k3_udma_glue_cfg_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)
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;
+ req.tx_atype = tx_chn->common.atype_asel;

return tisci_rm->tisci_udmap_ops->tx_ch_cfg(tisci_rm->tisci, &req);
}
@@ -255,8 +277,14 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev,
tx_chn->common.psdata_size,
tx_chn->common.swdata_size);

+ if (xudma_is_pktdma(tx_chn->common.udmax))
+ tx_chn->udma_tchan_id = tx_chn->common.ep_config->mapped_channel_id;
+ else
+ tx_chn->udma_tchan_id = -1;
+
/* request and cfg UDMAP TX channel */
- tx_chn->udma_tchanx = xudma_tchan_get(tx_chn->common.udmax, -1);
+ tx_chn->udma_tchanx = xudma_tchan_get(tx_chn->common.udmax,
+ tx_chn->udma_tchan_id);
if (IS_ERR(tx_chn->udma_tchanx)) {
ret = PTR_ERR(tx_chn->udma_tchanx);
dev_err(dev, "UDMAX tchanx get err %d\n", ret);
@@ -264,11 +292,34 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev,
}
tx_chn->udma_tchan_id = xudma_tchan_get_id(tx_chn->udma_tchanx);

+ tx_chn->common.chan_dev.class = &k3_udma_glue_devclass;
+ tx_chn->common.chan_dev.parent = xudma_get_device(tx_chn->common.udmax);
+ dev_set_name(&tx_chn->common.chan_dev, "tchan%d-0x%04x",
+ tx_chn->udma_tchan_id, tx_chn->common.dst_thread);
+ ret = device_register(&tx_chn->common.chan_dev);
+ if (ret) {
+ dev_err(dev, "Channel Device registration failed %d\n", ret);
+ tx_chn->common.chan_dev.parent = NULL;
+ goto err;
+ }
+
+ if (xudma_is_pktdma(tx_chn->common.udmax)) {
+ /* prepare the channel device as coherent */
+ tx_chn->common.chan_dev.dma_coherent = true;
+ dma_coerce_mask_and_coherent(&tx_chn->common.chan_dev,
+ DMA_BIT_MASK(48));
+ }
+
atomic_set(&tx_chn->free_pkts, cfg->txcq_cfg.size);

+ if (xudma_is_pktdma(tx_chn->common.udmax))
+ tx_chn->udma_tflow_id = tx_chn->common.ep_config->default_flow_id;
+ else
+ tx_chn->udma_tflow_id = tx_chn->udma_tchan_id;
+
/* request and cfg rings */
ret = k3_ringacc_request_rings_pair(tx_chn->common.ringacc,
- tx_chn->udma_tchan_id, -1,
+ tx_chn->udma_tflow_id, -1,
&tx_chn->ringtx,
&tx_chn->ringtxcq);
if (ret) {
@@ -280,6 +331,12 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev,
cfg->tx_cfg.dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn);
cfg->txcq_cfg.dma_dev = cfg->tx_cfg.dma_dev;

+ /* Set the ASEL value for DMA rings of PKTDMA */
+ if (xudma_is_pktdma(tx_chn->common.udmax)) {
+ cfg->tx_cfg.asel = tx_chn->common.atype_asel;
+ cfg->txcq_cfg.asel = tx_chn->common.atype_asel;
+ }
+
ret = k3_ringacc_ring_cfg(tx_chn->ringtx, &cfg->tx_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringtx %d\n", ret);
@@ -331,6 +388,11 @@ void k3_udma_glue_release_tx_chn(struct k3_udma_glue_tx_channel *tx_chn)

if (tx_chn->ringtx)
k3_ringacc_ring_free(tx_chn->ringtx);
+
+ if (tx_chn->common.chan_dev.parent) {
+ device_unregister(&tx_chn->common.chan_dev);
+ tx_chn->common.chan_dev.parent = NULL;
+ }
}
EXPORT_SYMBOL_GPL(k3_udma_glue_release_tx_chn);

@@ -443,13 +505,10 @@ 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))
{
+ struct device *dev = tx_chn->common.dev;
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:
@@ -458,17 +517,20 @@ void k3_udma_glue_reset_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
* 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);
+ dev_dbg(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);
+ if (ret != -ENODATA)
+ dev_err(dev, "TX reset pop %d\n", ret);
break;
}
cleanup(data, desc_dma);
}

+ /* reset TXCQ as it is not input for udma - expected to be empty */
+ k3_ringacc_ring_reset(tx_chn->ringtxcq);
k3_ringacc_ring_reset_dma(tx_chn->ringtx, occ_tx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_reset_tx_chn);
@@ -487,7 +549,12 @@ 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);
+ if (xudma_is_pktdma(tx_chn->common.udmax)) {
+ tx_chn->virq = xudma_pktdma_tflow_get_irq(tx_chn->common.udmax,
+ tx_chn->udma_tflow_id);
+ } else {
+ tx_chn->virq = k3_ringacc_get_ring_irq_num(tx_chn->ringtxcq);
+ }

return tx_chn->virq;
}
@@ -496,10 +563,36 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_irq);
struct device *
k3_udma_glue_tx_get_dma_device(struct k3_udma_glue_tx_channel *tx_chn)
{
+ if (xudma_is_pktdma(tx_chn->common.udmax) &&
+ (tx_chn->common.atype_asel == 14 || tx_chn->common.atype_asel == 15))
+ return &tx_chn->common.chan_dev;
+
return xudma_get_device(tx_chn->common.udmax);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_dma_device);

+void k3_udma_glue_tx_dma_to_cppi5_addr(struct k3_udma_glue_tx_channel *tx_chn,
+ dma_addr_t *addr)
+{
+ if (!xudma_is_pktdma(tx_chn->common.udmax) ||
+ !tx_chn->common.atype_asel)
+ return;
+
+ *addr |= (u64)tx_chn->common.atype_asel << K3_ADDRESS_ASEL_SHIFT;
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_tx_dma_to_cppi5_addr);
+
+void k3_udma_glue_tx_cppi5_to_dma_addr(struct k3_udma_glue_tx_channel *tx_chn,
+ dma_addr_t *addr)
+{
+ if (!xudma_is_pktdma(tx_chn->common.udmax) ||
+ !tx_chn->common.atype_asel)
+ return;
+
+ *addr &= (u64)GENMASK(K3_ADDRESS_ASEL_SHIFT - 1, 0);
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_tx_cppi5_to_dma_addr);
+
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;
@@ -511,8 +604,6 @@ static int k3_udma_glue_cfg_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
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;
@@ -524,13 +615,16 @@ static int k3_udma_glue_cfg_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
* 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) {
+ if (!xudma_is_pktdma(rx_chn->common.udmax) && rx_chn->flow_num &&
+ rx_chn->flow_id_base != rx_chn->udma_rchan_id) {
/* Default flow + extra ones */
+ 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;
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;
+ req.rx_atype = rx_chn->common.atype_asel;

ret = tisci_rm->tisci_udmap_ops->rx_ch_cfg(tisci_rm->tisci, &req);
if (ret)
@@ -584,10 +678,18 @@ static int k3_udma_glue_cfg_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
goto err_rflow_put;
}

+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ rx_ringfdq_id = flow->udma_rflow_id +
+ xudma_get_rflow_ring_offset(rx_chn->common.udmax);
+ rx_ring_id = 0;
+ } else {
+ rx_ring_id = flow_cfg->ring_rxq_id;
+ rx_ringfdq_id = flow_cfg->ring_rxfdq0_id;
+ }
+
/* request and cfg rings */
ret = k3_ringacc_request_rings_pair(rx_chn->common.ringacc,
- flow_cfg->ring_rxfdq0_id,
- flow_cfg->ring_rxq_id,
+ rx_ringfdq_id, rx_ring_id,
&flow->ringrxfdq,
&flow->ringrx);
if (ret) {
@@ -599,6 +701,12 @@ static int k3_udma_glue_cfg_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
flow_cfg->rx_cfg.dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn);
flow_cfg->rxfdq_cfg.dma_dev = flow_cfg->rx_cfg.dma_dev;

+ /* Set the ASEL value for DMA rings of PKTDMA */
+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ flow_cfg->rx_cfg.asel = rx_chn->common.atype_asel;
+ flow_cfg->rxfdq_cfg.asel = rx_chn->common.atype_asel;
+ }
+
ret = k3_ringacc_ring_cfg(flow->ringrx, &flow_cfg->rx_cfg);
if (ret) {
dev_err(dev, "Failed to cfg ringrx %d\n", ret);
@@ -757,6 +865,7 @@ 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;
+ struct psil_endpoint_config *ep_cfg;
int ret, i;

if (cfg->flow_id_num <= 0)
@@ -784,8 +893,16 @@ k3_udma_glue_request_rx_chn_priv(struct device *dev, const char *name,
rx_chn->common.psdata_size,
rx_chn->common.swdata_size);

+ ep_cfg = rx_chn->common.ep_config;
+
+ if (xudma_is_pktdma(rx_chn->common.udmax))
+ rx_chn->udma_rchan_id = ep_cfg->mapped_channel_id;
+ else
+ rx_chn->udma_rchan_id = -1;
+
/* request and cfg UDMAP RX channel */
- rx_chn->udma_rchanx = xudma_rchan_get(rx_chn->common.udmax, -1);
+ rx_chn->udma_rchanx = xudma_rchan_get(rx_chn->common.udmax,
+ rx_chn->udma_rchan_id);
if (IS_ERR(rx_chn->udma_rchanx)) {
ret = PTR_ERR(rx_chn->udma_rchanx);
dev_err(dev, "UDMAX rchanx get err %d\n", ret);
@@ -793,12 +910,48 @@ k3_udma_glue_request_rx_chn_priv(struct device *dev, const char *name,
}
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;
+ rx_chn->common.chan_dev.class = &k3_udma_glue_devclass;
+ rx_chn->common.chan_dev.parent = xudma_get_device(rx_chn->common.udmax);
+ dev_set_name(&rx_chn->common.chan_dev, "rchan%d-0x%04x",
+ rx_chn->udma_rchan_id, rx_chn->common.src_thread);
+ ret = device_register(&rx_chn->common.chan_dev);
+ if (ret) {
+ dev_err(dev, "Channel Device registration failed %d\n", ret);
+ rx_chn->common.chan_dev.parent = NULL;
+ goto err;
+ }

- /* 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;
+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ /* prepare the channel device as coherent */
+ rx_chn->common.chan_dev.dma_coherent = true;
+ dma_coerce_mask_and_coherent(&rx_chn->common.chan_dev,
+ DMA_BIT_MASK(48));
+ }
+
+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ int flow_start = cfg->flow_id_base;
+ int flow_end;
+
+ if (flow_start == -1)
+ flow_start = ep_cfg->flow_start;
+
+ flow_end = flow_start + cfg->flow_id_num - 1;
+ if (flow_start < ep_cfg->flow_start ||
+ flow_end > (ep_cfg->flow_start + ep_cfg->flow_num - 1)) {
+ dev_err(dev, "Invalid flow range requested\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ rx_chn->flow_id_base = flow_start;
+ } else {
+ 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->flow_num = cfg->flow_id_num;

rx_chn->flows = devm_kcalloc(dev, rx_chn->flow_num,
sizeof(*rx_chn->flows), GFP_KERNEL);
@@ -888,6 +1041,24 @@ k3_udma_glue_request_remote_rx_chn(struct device *dev, const char *name,
goto err;
}

+ rx_chn->common.chan_dev.class = &k3_udma_glue_devclass;
+ rx_chn->common.chan_dev.parent = xudma_get_device(rx_chn->common.udmax);
+ dev_set_name(&rx_chn->common.chan_dev, "rchan_remote-0x%04x",
+ rx_chn->common.src_thread);
+ ret = device_register(&rx_chn->common.chan_dev);
+ if (ret) {
+ dev_err(dev, "Channel Device registration failed %d\n", ret);
+ rx_chn->common.chan_dev.parent = NULL;
+ goto err;
+ }
+
+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ /* prepare the channel device as coherent */
+ rx_chn->common.chan_dev.dma_coherent = true;
+ dma_coerce_mask_and_coherent(&rx_chn->common.chan_dev,
+ DMA_BIT_MASK(48));
+ }
+
ret = k3_udma_glue_allocate_rx_flows(rx_chn, cfg);
if (ret)
goto err;
@@ -940,6 +1111,11 @@ void k3_udma_glue_release_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
if (!IS_ERR_OR_NULL(rx_chn->udma_rchanx))
xudma_rchan_put(rx_chn->common.udmax,
rx_chn->udma_rchanx);
+
+ if (rx_chn->common.chan_dev.parent) {
+ device_unregister(&rx_chn->common.chan_dev);
+ rx_chn->common.chan_dev.parent = NULL;
+ }
}
EXPORT_SYMBOL_GPL(k3_udma_glue_release_rx_chn);

@@ -1151,12 +1327,10 @@ void k3_udma_glue_reset_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
/* 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;
+ goto do_reset;

/*
* RX FDQ reset need to be special way as it is input for udma and its
@@ -1171,13 +1345,17 @@ void k3_udma_glue_reset_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
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);
+ if (ret != -ENODATA)
+ dev_err(dev, "RX reset pop %d\n", ret);
break;
}
cleanup(data, desc_dma);
}

k3_ringacc_ring_reset_dma(flow->ringrxfdq, occ_rx);
+
+do_reset:
+ k3_ringacc_ring_reset(flow->ringrx);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_reset_rx_chn);

@@ -1207,7 +1385,12 @@ int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn,

flow = &rx_chn->flows[flow_num];

- flow->virq = k3_ringacc_get_ring_irq_num(flow->ringrx);
+ if (xudma_is_pktdma(rx_chn->common.udmax)) {
+ flow->virq = xudma_pktdma_rflow_get_irq(rx_chn->common.udmax,
+ flow->udma_rflow_id);
+ } else {
+ flow->virq = k3_ringacc_get_ring_irq_num(flow->ringrx);
+ }

return flow->virq;
}
@@ -1216,6 +1399,38 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_irq);
struct device *
k3_udma_glue_rx_get_dma_device(struct k3_udma_glue_rx_channel *rx_chn)
{
+ if (xudma_is_pktdma(rx_chn->common.udmax) &&
+ (rx_chn->common.atype_asel == 14 || rx_chn->common.atype_asel == 15))
+ return &rx_chn->common.chan_dev;
+
return xudma_get_device(rx_chn->common.udmax);
}
EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_dma_device);
+
+void k3_udma_glue_rx_dma_to_cppi5_addr(struct k3_udma_glue_rx_channel *rx_chn,
+ dma_addr_t *addr)
+{
+ if (!xudma_is_pktdma(rx_chn->common.udmax) ||
+ !rx_chn->common.atype_asel)
+ return;
+
+ *addr |= (u64)rx_chn->common.atype_asel << K3_ADDRESS_ASEL_SHIFT;
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_rx_dma_to_cppi5_addr);
+
+void k3_udma_glue_rx_cppi5_to_dma_addr(struct k3_udma_glue_rx_channel *rx_chn,
+ dma_addr_t *addr)
+{
+ if (!xudma_is_pktdma(rx_chn->common.udmax) ||
+ !rx_chn->common.atype_asel)
+ return;
+
+ *addr &= (u64)GENMASK(K3_ADDRESS_ASEL_SHIFT - 1, 0);
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_rx_cppi5_to_dma_addr);
+
+static int __init k3_udma_glue_class_init(void)
+{
+ return class_register(&k3_udma_glue_devclass);
+}
+arch_initcall(k3_udma_glue_class_init);
diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c
index b8567dace644..aada84f40723 100644
--- a/drivers/dma/ti/k3-udma-private.c
+++ b/drivers/dma/ti/k3-udma-private.c
@@ -157,3 +157,27 @@ void xudma_##res##rt_write(struct udma_##res *p, int reg, u32 val) \
EXPORT_SYMBOL(xudma_##res##rt_write)
XUDMA_RT_IO_FUNCTIONS(tchan);
XUDMA_RT_IO_FUNCTIONS(rchan);
+
+int xudma_is_pktdma(struct udma_dev *ud)
+{
+ return ud->match_data->type == DMA_TYPE_PKTDMA;
+}
+EXPORT_SYMBOL(xudma_is_pktdma);
+
+int xudma_pktdma_tflow_get_irq(struct udma_dev *ud, int udma_tflow_id)
+{
+ const struct udma_oes_offsets *oes = &ud->soc_data->oes;
+
+ return ti_sci_inta_msi_get_virq(ud->dev, udma_tflow_id +
+ oes->pktdma_tchan_flow);
+}
+EXPORT_SYMBOL(xudma_pktdma_tflow_get_irq);
+
+int xudma_pktdma_rflow_get_irq(struct udma_dev *ud, int udma_rflow_id)
+{
+ const struct udma_oes_offsets *oes = &ud->soc_data->oes;
+
+ return ti_sci_inta_msi_get_virq(ud->dev, udma_rflow_id +
+ oes->pktdma_rchan_flow);
+}
+EXPORT_SYMBOL(xudma_pktdma_rflow_get_irq);
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index ccb19f286daf..d349c6d482ae 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -157,4 +157,8 @@ void xudma_rchanrt_write(struct udma_rchan *rchan, int reg, u32 val);
bool xudma_rflow_is_gp(struct udma_dev *ud, int id);
int xudma_get_rflow_ring_offset(struct udma_dev *ud);

+int xudma_is_pktdma(struct udma_dev *ud);
+
+int xudma_pktdma_tflow_get_irq(struct udma_dev *ud, int udma_tflow_id);
+int xudma_pktdma_rflow_get_irq(struct udma_dev *ud, int udma_rflow_id);
#endif /* K3_UDMA_H_ */
diff --git a/include/linux/dma/k3-udma-glue.h b/include/linux/dma/k3-udma-glue.h
index d7c12f31377c..e443be4d3b4b 100644
--- a/include/linux/dma/k3-udma-glue.h
+++ b/include/linux/dma/k3-udma-glue.h
@@ -43,6 +43,10 @@ u32 k3_udma_glue_tx_get_txcq_id(struct k3_udma_glue_tx_channel *tx_chn);
int k3_udma_glue_tx_get_irq(struct k3_udma_glue_tx_channel *tx_chn);
struct device *
k3_udma_glue_tx_get_dma_device(struct k3_udma_glue_tx_channel *tx_chn);
+void k3_udma_glue_tx_dma_to_cppi5_addr(struct k3_udma_glue_tx_channel *tx_chn,
+ dma_addr_t *addr);
+void k3_udma_glue_tx_cppi5_to_dma_addr(struct k3_udma_glue_tx_channel *tx_chn,
+ dma_addr_t *addr);

enum {
K3_UDMA_GLUE_SRC_TAG_LO_KEEP = 0,
@@ -134,5 +138,9 @@ int k3_udma_glue_rx_flow_disable(struct k3_udma_glue_rx_channel *rx_chn,
u32 flow_idx);
struct device *
k3_udma_glue_rx_get_dma_device(struct k3_udma_glue_rx_channel *rx_chn);
+void k3_udma_glue_rx_dma_to_cppi5_addr(struct k3_udma_glue_rx_channel *rx_chn,
+ dma_addr_t *addr);
+void k3_udma_glue_rx_cppi5_to_dma_addr(struct k3_udma_glue_rx_channel *rx_chn,
+ dma_addr_t *addr);

#endif /* K3_UDMA_GLUE_H_ */