[PATCH 4/6] dma: ti: k3-udma: Introduce udma_chan_config struct
Vignesh Raghavendra
vigneshr at ti.com
Mon Jul 6 09:56:25 CEST 2020
Encapsulate channel configuration in a separate struct so as to ease
resetting of these fields with memset() and also to increase readability
of the code.
Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
---
drivers/dma/ti/k3-udma.c | 197 +++++++++++++++++++++------------------
1 file changed, 108 insertions(+), 89 deletions(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 5fc8692e19..375e904fa9 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -137,6 +137,26 @@ struct udma_dev {
u32 ch_count;
};
+struct udma_chan_config {
+ u32 psd_size; /* size of Protocol Specific Data */
+ u32 metadata_size; /* (needs_epib ? 16:0) + psd_size */
+ u32 hdesc_size; /* Size of a packet descriptor in packet mode */
+ int remote_thread_id;
+ u32 atype;
+ u32 src_thread;
+ u32 dst_thread;
+ enum psil_endpoint_type ep_type;
+ enum udma_tp_level channel_tpl; /* Channel Throughput Level */
+
+ enum dma_direction dir;
+
+ unsigned int pkt_mode:1; /* TR or packet */
+ unsigned int needs_epib:1; /* EPIB is needed for the communication or not */
+ unsigned int enable_acc32:1;
+ unsigned int enable_burst:1;
+ unsigned int notdpkt:1; /* Suppress sending TDC packet */
+};
+
struct udma_chan {
struct udma_dev *ud;
char name[20];
@@ -149,20 +169,11 @@ struct udma_chan {
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;
+ struct udma_chan_config config;
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;
@@ -288,7 +299,7 @@ static inline bool udma_is_chan_running(struct udma_chan *uc)
u32 trt_ctl = 0;
u32 rrt_ctl = 0;
- switch (uc->dir) {
+ switch (uc->config.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",
@@ -322,7 +333,7 @@ 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) {
+ switch (uc->config.dir) {
case DMA_DEV_TO_MEM:
ring = uc->rchan->r_ring;
break;
@@ -347,7 +358,7 @@ static void udma_reset_rings(struct udma_chan *uc)
struct k3_nav_ring *ring1 = NULL;
struct k3_nav_ring *ring2 = NULL;
- switch (uc->dir) {
+ switch (uc->config.dir) {
case DMA_DEV_TO_MEM:
ring1 = uc->rchan->fd_ring;
ring2 = uc->rchan->r_ring;
@@ -409,7 +420,7 @@ static inline int udma_stop_hard(struct udma_chan *uc)
{
pr_debug("%s: ENTER (chan%d)\n", __func__, uc->id);
- switch (uc->dir) {
+ switch (uc->config.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);
@@ -435,9 +446,8 @@ static int udma_start(struct udma_chan *uc)
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);
+ pr_debug("%s: chan:%d dir:%s\n",
+ __func__, uc->id, udma_get_dir_text(uc->config.dir));
/* Make sure that we clear the teardown bit, if it is set */
udma_stop_hard(uc);
@@ -445,7 +455,7 @@ static int udma_start(struct udma_chan *uc)
/* Reset all counters */
udma_reset_counters(uc);
- switch (uc->dir) {
+ switch (uc->config.dir) {
case DMA_DEV_TO_MEM:
udma_rchanrt_write(uc->rchan, UDMA_RCHAN_RT_CTL_REG,
UDMA_CHAN_RT_CTL_EN);
@@ -547,10 +557,10 @@ static inline void udma_stop_dev2mem(struct udma_chan *uc, bool sync)
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));
+ __func__, uc->id, udma_get_dir_text(uc->config.dir));
udma_reset_counters(uc);
- switch (uc->dir) {
+ switch (uc->config.dir) {
case DMA_DEV_TO_MEM:
udma_stop_dev2mem(uc, true);
break;
@@ -851,7 +861,7 @@ static int udma_alloc_rx_resources(struct udma_chan *uc)
return ret;
/* For MEM_TO_MEM we don't need rflow or rings */
- if (uc->dir == DMA_MEM_TO_MEM)
+ if (uc->config.dir == DMA_MEM_TO_MEM)
return 0;
ret = udma_get_rflow(uc, uc->rchan->id);
@@ -913,7 +923,7 @@ static int udma_alloc_tchan_sci_req(struct udma_chan *uc)
u32 mode;
int ret;
- if (uc->pkt_mode)
+ if (uc->config.pkt_mode)
mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
else
mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR;
@@ -924,11 +934,11 @@ static int udma_alloc_tchan_sci_req(struct udma_chan *uc)
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)
+ if (uc->config.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,
+ req.tx_fetch_size = cppi5_hdesc_calc_size(uc->config.needs_epib,
+ uc->config.psd_size,
0) >> 2;
req.txcq_qnum = tc_ring;
@@ -951,7 +961,7 @@ static int udma_alloc_rchan_sci_req(struct udma_chan *uc)
u32 mode;
int ret;
- if (uc->pkt_mode)
+ if (uc->config.pkt_mode)
mode = TI_SCI_RM_UDMAP_CHAN_TYPE_PKT_PBRR;
else
mode = TI_SCI_RM_UDMAP_CHAN_TYPE_3RDP_BCOPY_PBRR;
@@ -964,16 +974,16 @@ static int udma_alloc_rchan_sci_req(struct udma_chan *uc)
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) {
+ if (uc->config.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,
+ req.rx_fetch_size = cppi5_hdesc_calc_size(uc->config.needs_epib,
+ uc->config.psd_size,
0) >> 2;
req.rxcq_qnum = rx_ring;
}
- if (uc->rflow->id != uc->rchan->id && uc->dir != DMA_MEM_TO_MEM) {
+ if (uc->rflow->id != uc->rchan->id && uc->config.dir != DMA_MEM_TO_MEM) {
req.flowid_start = uc->rflow->id;
req.flowid_cnt = 1;
}
@@ -984,7 +994,7 @@ static int udma_alloc_rchan_sci_req(struct udma_chan *uc)
uc->rchan->id, ret);
return ret;
}
- if (uc->dir == DMA_MEM_TO_MEM)
+ if (uc->config.dir == DMA_MEM_TO_MEM)
return ret;
flow_req.valid_params =
@@ -1006,12 +1016,12 @@ static int udma_alloc_rchan_sci_req(struct udma_chan *uc)
flow_req.nav_id = tisci_rm->tisci_dev_id;
flow_req.flow_index = uc->rflow->id;
- if (uc->needs_epib)
+ if (uc->config.needs_epib)
flow_req.rx_einfo_present = 1;
else
flow_req.rx_einfo_present = 0;
- if (uc->psd_size)
+ if (uc->config.psd_size)
flow_req.rx_psinfo_present = 1;
else
flow_req.rx_psinfo_present = 0;
@@ -1044,11 +1054,12 @@ static int udma_alloc_chan_resources(struct udma_chan *uc)
int ret;
pr_debug("%s: chan:%d as %s\n",
- __func__, uc->id, udma_get_dir_text(uc->dir));
+ __func__, uc->id, udma_get_dir_text(uc->config.dir));
- switch (uc->dir) {
+ switch (uc->config.dir) {
case DMA_MEM_TO_MEM:
/* Non synchronized - mem to mem type of transfer */
+ uc->config.pkt_mode = false;
ret = udma_get_chan_pair(uc);
if (ret)
return ret;
@@ -1061,8 +1072,8 @@ static int udma_alloc_chan_resources(struct udma_chan *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;
+ uc->config.src_thread = ud->psil_base + uc->tchan->id;
+ uc->config.dst_thread = (ud->psil_base + uc->rchan->id) | 0x8000;
break;
case DMA_MEM_TO_DEV:
/* Slave transfer synchronized - mem to dev (TX) trasnfer */
@@ -1070,10 +1081,9 @@ static int udma_alloc_chan_resources(struct udma_chan *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;
+ uc->config.src_thread = ud->psil_base + uc->tchan->id;
+ uc->config.dst_thread = uc->config.remote_thread_id;
+ uc->config.dst_thread |= 0x8000;
break;
case DMA_DEV_TO_MEM:
@@ -1082,19 +1092,19 @@ static int udma_alloc_chan_resources(struct udma_chan *uc)
if (ret)
goto err_free_res;
- uc->src_thread = uc->slave_thread_id;
- uc->dst_thread = (ud->psil_base + uc->rchan->id) | 0x8000;
+ uc->config.src_thread = uc->config.remote_thread_id;
+ uc->config.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);
+ __func__, uc->id, uc->config.dir);
return -EINVAL;
}
/* We have channel indexes and rings */
- if (uc->dir == DMA_MEM_TO_MEM) {
+ if (uc->config.dir == DMA_MEM_TO_MEM) {
ret = udma_alloc_tchan_sci_req(uc);
if (ret)
goto err_free_res;
@@ -1104,7 +1114,7 @@ static int udma_alloc_chan_resources(struct udma_chan *uc)
goto err_free_res;
} else {
/* Slave transfer */
- if (uc->dir == DMA_MEM_TO_DEV) {
+ if (uc->config.dir == DMA_MEM_TO_DEV) {
ret = udma_alloc_tchan_sci_req(uc);
if (ret)
goto err_free_res;
@@ -1125,7 +1135,7 @@ static int udma_alloc_chan_resources(struct udma_chan *uc)
}
/* PSI-L pairing */
- ret = udma_navss_psil_pair(ud, uc->src_thread, uc->dst_thread);
+ ret = udma_navss_psil_pair(ud, uc->config.src_thread, uc->config.dst_thread);
if (ret) {
dev_err(ud->dev, "k3_nav_psil_request_link fail\n");
goto err_free_res;
@@ -1136,7 +1146,7 @@ static int udma_alloc_chan_resources(struct udma_chan *uc)
err_free_res:
udma_free_tx_resources(uc);
udma_free_rx_resources(uc);
- uc->slave_thread_id = -1;
+ uc->config.remote_thread_id = -1;
return ret;
}
@@ -1145,15 +1155,15 @@ 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);
+ udma_navss_psil_unpair(uc->ud, uc->config.src_thread, uc->config.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;
+ uc->config.remote_thread_id = -1;
+ uc->config.dir = DMA_MEM_TO_MEM;
}
static int udma_get_mmrs(struct udevice *dev)
@@ -1377,10 +1387,10 @@ static int udma_probe(struct udevice *dev)
uc->ud = ud;
uc->id = i;
- uc->slave_thread_id = -1;
+ uc->config.remote_thread_id = -1;
uc->tchan = NULL;
uc->rchan = NULL;
- uc->dir = DMA_MEM_TO_MEM;
+ uc->config.dir = DMA_MEM_TO_MEM;
sprintf(uc->name, "UDMA chan%d\n", i);
if (!i)
uc->in_use = true;
@@ -1527,6 +1537,7 @@ static int udma_transfer(struct udevice *dev, int direction,
static int udma_request(struct dma *dma)
{
struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan_config *ucc;
struct udma_chan *uc;
unsigned long dummy;
int ret;
@@ -1537,30 +1548,27 @@ static int udma_request(struct dma *dma)
}
uc = &ud->channels[dma->id];
+ ucc = &uc->config;
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);
+ if (uc->config.dir == DMA_MEM_TO_DEV) {
+ uc->desc_tx = dma_alloc_coherent(ucc->hdesc_size, &dummy);
+ memset(uc->desc_tx, 0, ucc->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);
+ ucc->hdesc_size * UDMA_RX_DESC_NUM, &dummy);
+ memset(uc->desc_rx, 0, ucc->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) {
+ if (uc->config.dir == DMA_DEV_TO_MEM) {
uc->cfg_data.flow_id_base = uc->rflow->id;
uc->cfg_data.flow_id_cnt = 1;
}
@@ -1645,7 +1653,7 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
}
uc = &ud->channels[dma->id];
- if (uc->dir != DMA_MEM_TO_DEV)
+ if (uc->config.dir != DMA_MEM_TO_DEV)
return -EINVAL;
tc_ring_id = k3_nav_ringacc_get_ring_id(uc->tchan->tc_ring);
@@ -1655,8 +1663,8 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
cppi5_hdesc_reset_hbdesc(desc_tx);
cppi5_hdesc_init(desc_tx,
- uc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_PRESENT : 0,
- uc->psd_size);
+ uc->config.needs_epib ? CPPI5_INFO0_HDESC_EPIB_PRESENT : 0,
+ uc->config.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);
@@ -1669,7 +1677,7 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
ALIGN((unsigned long)dma_src + len,
ARCH_DMA_MINALIGN));
flush_dcache_range((unsigned long)desc_tx,
- ALIGN((unsigned long)desc_tx + uc->hdesc_size,
+ ALIGN((unsigned long)desc_tx + uc->config.hdesc_size,
ARCH_DMA_MINALIGN));
ret = udma_push_to_ring(uc->tchan->t_ring, uc->desc_tx);
@@ -1687,6 +1695,7 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
static int udma_receive(struct dma *dma, void **dst, void *metadata)
{
struct udma_dev *ud = dev_get_priv(dma->dev);
+ struct udma_chan_config *ucc;
struct cppi5_host_desc_t *desc_rx;
dma_addr_t buf_dma;
struct udma_chan *uc;
@@ -1699,8 +1708,9 @@ static int udma_receive(struct dma *dma, void **dst, void *metadata)
return -EINVAL;
}
uc = &ud->channels[dma->id];
+ ucc = &uc->config;
- if (uc->dir != DMA_DEV_TO_MEM)
+ if (uc->config.dir != DMA_DEV_TO_MEM)
return -EINVAL;
if (!uc->num_rx_bufs)
return -EINVAL;
@@ -1715,7 +1725,7 @@ static int udma_receive(struct dma *dma, void **dst, void *metadata)
/* invalidate cache data */
invalidate_dcache_range((ulong)desc_rx,
- (ulong)(desc_rx + uc->hdesc_size));
+ (ulong)(desc_rx + ucc->hdesc_size));
cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
@@ -1734,6 +1744,7 @@ static int udma_receive(struct dma *dma, void **dst, void *metadata)
static int udma_of_xlate(struct dma *dma, struct ofnode_phandle_args *args)
{
+ struct udma_chan_config *ucc;
struct udma_dev *ud = dev_get_priv(dma->dev);
struct udma_chan *uc = &ud->channels[0];
struct psil_endpoint_config *ep_config;
@@ -1748,32 +1759,40 @@ static int udma_of_xlate(struct dma *dma, struct ofnode_phandle_args *args)
if (val == ud->ch_count)
return -EBUSY;
- uc->slave_thread_id = args->args[0];
- if (uc->slave_thread_id & K3_PSIL_DST_THREAD_ID_OFFSET)
- uc->dir = DMA_MEM_TO_DEV;
+ ucc = &uc->config;
+ ucc->remote_thread_id = args->args[0];
+ if (ucc->remote_thread_id & K3_PSIL_DST_THREAD_ID_OFFSET)
+ ucc->dir = DMA_MEM_TO_DEV;
else
- uc->dir = DMA_DEV_TO_MEM;
+ ucc->dir = DMA_DEV_TO_MEM;
- ep_config = psil_get_ep_config(uc->slave_thread_id);
+ ep_config = psil_get_ep_config(ucc->remote_thread_id);
if (IS_ERR(ep_config)) {
dev_err(ud->dev, "No configuration for psi-l thread 0x%04x\n",
- uc->slave_thread_id);
- uc->dir = DMA_MEM_TO_MEM;
- uc->slave_thread_id = -1;
+ uc->config.remote_thread_id);
+ ucc->dir = DMA_MEM_TO_MEM;
+ ucc->remote_thread_id = -1;
return false;
}
- uc->pkt_mode = ep_config->pkt_mode;
+ ucc->pkt_mode = ep_config->pkt_mode;
+ ucc->channel_tpl = ep_config->channel_tpl;
+ ucc->notdpkt = ep_config->notdpkt;
+ ucc->ep_type = ep_config->ep_type;
+
+ ucc->needs_epib = ep_config->needs_epib;
+ ucc->psd_size = ep_config->psd_size;
+ ucc->metadata_size = (ucc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_SIZE : 0) + ucc->psd_size;
- uc->needs_epib = ep_config->needs_epib;
- uc->psd_size = ep_config->psd_size;
- uc->metadata_size = (uc->needs_epib ? CPPI5_INFO0_HDESC_EPIB_SIZE : 0) + uc->psd_size;
+ ucc->hdesc_size = cppi5_hdesc_calc_size(ucc->needs_epib,
+ ucc->psd_size, 0);
+ ucc->hdesc_size = ALIGN(ucc->hdesc_size, ARCH_DMA_MINALIGN);
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);
+ dma->id, ucc->needs_epib,
+ ucc->psd_size, ucc->metadata_size,
+ ucc->remote_thread_id);
return 0;
}
@@ -1792,26 +1811,26 @@ int udma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
}
uc = &ud->channels[dma->id];
- if (uc->dir != DMA_DEV_TO_MEM)
+ if (uc->config.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);
+ desc_rx = uc->desc_rx + (desc_num * uc->config.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);
+ uc->config.needs_epib ? CPPI5_INFO0_HDESC_EPIB_PRESENT : 0,
+ uc->config.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,
+ ALIGN((unsigned long)desc_rx + uc->config.hdesc_size,
ARCH_DMA_MINALIGN));
udma_push_to_ring(uc->rchan->fd_ring, desc_rx);
--
2.27.0
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