[net-next v7 3/4] net: wwan: t7xx: Infrastructure for early port configuration

Jinjian Song
2024-02-01T15:14:59Z

From: Jinjian Song <jinjian.song@fibocom.com>

To support cases such as FW update or Core dump, the t7xx
device is capable of signaling the host that a special port
needs to be created before the handshake phase.

Adds the infrastructure required to create the early ports
which also requires a different configuration of CLDMA queues.

Base on the v5 patch version of follow series:
'net: wwan: t7xx: fw flashing & coredump support'
(https://patchwork.kernel.org/project/netdevbpf/patch/3777bb382f4b0395cb594a602c5c79dbab86c9e0.1674307425.git.m.chetan.kumar@linux.intel.com/)

Signed-off-by: Jinjian Song <jinjian.song@fibocom.com>
---
v7:
* optimize fsm_routine_stopping()
v5:
* using t7xx_mode_update to update sysfs t7xx_mode
v4:
* change PORT_CH_ID_UNIMPORTANT to PORT_CH_UNIMPORTANT
* delete t7xx_wait_pm_config() in t7xx_pci_pm_init()
* define T7XX_MAX_POSSIBLE_PORTS_NUM to get max port num
* define macro wait_for_expected_dev_stage to be more readable
* change prev_status to status in struct t7xx_fsm_ctl
---
drivers/net/wwan/t7xx/t7xx_hif_cldma.c | 47 +++++---
drivers/net/wwan/t7xx/t7xx_hif_cldma.h | 18 ++-
drivers/net/wwan/t7xx/t7xx_modem_ops.c | 4 +-
drivers/net/wwan/t7xx/t7xx_pci.c | 2 +-
drivers/net/wwan/t7xx/t7xx_port.h | 4 +
drivers/net/wwan/t7xx/t7xx_port_proxy.c | 105 ++++++++++++++---
drivers/net/wwan/t7xx/t7xx_port_proxy.h | 10 ++
drivers/net/wwan/t7xx/t7xx_port_wwan.c | 5 +-
drivers/net/wwan/t7xx/t7xx_reg.h | 24 +++-
drivers/net/wwan/t7xx/t7xx_state_monitor.c | 131 +++++++++++++++++----
drivers/net/wwan/t7xx/t7xx_state_monitor.h | 1 +
11 files changed, 290 insertions(+), 61 deletions(-)

diff --git a/drivers/net/wwan/t7xx/t7xx_hif_cldma.c b/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
index cc70360364b7..abc41a7089fa 100644
--- a/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
@@ -57,8 +57,6 @@
#define CHECK_Q_STOP_TIMEOUT_US 1000000
#define CHECK_Q_STOP_STEP_US 10000

-#define CLDMA_JUMBO_BUFF_SZ (63 * 1024 + sizeof(struct ccci_header))
-
static void md_cd_queue_struct_reset(struct cldma_queue *queue, struct cldma_ctrl *md_ctrl,
enum mtk_txrx tx_rx, unsigned int index)
{
@@ -161,7 +159,7 @@ static int t7xx_cldma_gpd_rx_from_q(struct cldma_queue *queue, int budget, bool
skb_reset_tail_pointer(skb);
skb_put(skb, le16_to_cpu(gpd->data_buff_len));

- ret = md_ctrl->recv_skb(queue, skb);
+ ret = queue->recv_skb(queue, skb);
/* Break processing, will try again later */
if (ret < 0)
return ret;
@@ -897,13 +895,13 @@ static void t7xx_cldma_hw_start_send(struct cldma_ctrl *md_ctrl, int qno,

/**
* t7xx_cldma_set_recv_skb() - Set the callback to handle RX packets.
- * @md_ctrl: CLDMA context structure.
+ * @queue: CLDMA queue.
* @recv_skb: Receiving skb callback.
*/
-void t7xx_cldma_set_recv_skb(struct cldma_ctrl *md_ctrl,
+void t7xx_cldma_set_recv_skb(struct cldma_queue *queue,
int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb))
{
- md_ctrl->recv_skb = recv_skb;
+ queue->recv_skb = recv_skb;
}

/**
@@ -993,6 +991,28 @@ int t7xx_cldma_send_skb(struct cldma_ctrl *md_ctrl, int qno, struct sk_buff *skb
return ret;
}

+static void t7xx_cldma_adjust_config(struct cldma_ctrl *md_ctrl, enum cldma_cfg cfg_id)
+{
+ int qno;
+
+ for (qno = 0; qno < CLDMA_RXQ_NUM; qno++) {
+ md_ctrl->rx_ring[qno].pkt_size = CLDMA_SHARED_Q_BUFF_SZ;
+ t7xx_cldma_set_recv_skb(&md_ctrl->rxq[qno], t7xx_port_proxy_recv_skb);
+ }
+
+ md_ctrl->rx_ring[CLDMA_RXQ_NUM - 1].pkt_size = CLDMA_JUMBO_BUFF_SZ;
+
+ for (qno = 0; qno < CLDMA_TXQ_NUM; qno++)
+ md_ctrl->tx_ring[qno].pkt_size = CLDMA_SHARED_Q_BUFF_SZ;
+
+ if (cfg_id == CLDMA_DEDICATED_Q_CFG) {
+ md_ctrl->tx_ring[CLDMA_Q_IDX_DUMP].pkt_size = CLDMA_DEDICATED_Q_BUFF_SZ;
+ md_ctrl->rx_ring[CLDMA_Q_IDX_DUMP].pkt_size = CLDMA_DEDICATED_Q_BUFF_SZ;
+ t7xx_cldma_set_recv_skb(&md_ctrl->rxq[CLDMA_Q_IDX_DUMP],
+ t7xx_port_proxy_recv_skb_from_dedicated_queue);
+ }
+}
+
static int t7xx_cldma_late_init(struct cldma_ctrl *md_ctrl)
{
char dma_pool_name[32];
@@ -1018,16 +1038,9 @@ static int t7xx_cldma_late_init(struct cldma_ctrl *md_ctrl)
dev_err(md_ctrl->dev, "control TX ring init fail\n");
goto err_free_tx_ring;
}
-
- md_ctrl->tx_ring[i].pkt_size = CLDMA_MTU;
}

for (j = 0; j < CLDMA_RXQ_NUM; j++) {
- md_ctrl->rx_ring[j].pkt_size = CLDMA_MTU;
-
- if (j == CLDMA_RXQ_NUM - 1)
- md_ctrl->rx_ring[j].pkt_size = CLDMA_JUMBO_BUFF_SZ;
-
ret = t7xx_cldma_rx_ring_init(md_ctrl, &md_ctrl->rx_ring[j]);
if (ret) {
dev_err(md_ctrl->dev, "Control RX ring init fail\n");
@@ -1094,6 +1107,7 @@ int t7xx_cldma_alloc(enum cldma_id hif_id, struct t7xx_pci_dev *t7xx_dev)
{
struct device *dev = &t7xx_dev->pdev->dev;
struct cldma_ctrl *md_ctrl;
+ int qno;

md_ctrl = devm_kzalloc(dev, sizeof(*md_ctrl), GFP_KERNEL);
if (!md_ctrl)
@@ -1102,7 +1116,9 @@ int t7xx_cldma_alloc(enum cldma_id hif_id, struct t7xx_pci_dev *t7xx_dev)
md_ctrl->t7xx_dev = t7xx_dev;
md_ctrl->dev = dev;
md_ctrl->hif_id = hif_id;
- md_ctrl->recv_skb = t7xx_cldma_default_recv_skb;
+ for (qno = 0; qno < CLDMA_RXQ_NUM; qno++)
+ md_ctrl->rxq[qno].recv_skb = t7xx_cldma_default_recv_skb;
+
t7xx_hw_info_init(md_ctrl);
t7xx_dev->md->md_ctrl[hif_id] = md_ctrl;
return 0;
@@ -1332,9 +1348,10 @@ int t7xx_cldma_init(struct cldma_ctrl *md_ctrl)
return -ENOMEM;
}

-void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl)
+void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl, enum cldma_cfg cfg_id)
{
t7xx_cldma_late_release(md_ctrl);
+ t7xx_cldma_adjust_config(md_ctrl, cfg_id);
t7xx_cldma_late_init(md_ctrl);
}

diff --git a/drivers/net/wwan/t7xx/t7xx_hif_cldma.h b/drivers/net/wwan/t7xx/t7xx_hif_cldma.h
index 4410bac6993a..f2d9941be9c8 100644
--- a/drivers/net/wwan/t7xx/t7xx_hif_cldma.h
+++ b/drivers/net/wwan/t7xx/t7xx_hif_cldma.h
@@ -31,6 +31,10 @@
#include "t7xx_cldma.h"
#include "t7xx_pci.h"

+#define CLDMA_JUMBO_BUFF_SZ (63 * 1024 + sizeof(struct ccci_header))
+#define CLDMA_SHARED_Q_BUFF_SZ 3584
+#define CLDMA_DEDICATED_Q_BUFF_SZ 2048
+
/**
* enum cldma_id - Identifiers for CLDMA HW units.
* @CLDMA_ID_MD: Modem control channel.
@@ -55,6 +59,11 @@ struct cldma_gpd {
__le16 not_used2;
};

+enum cldma_cfg {
+ CLDMA_SHARED_Q_CFG,
+ CLDMA_DEDICATED_Q_CFG,
+};
+
struct cldma_request {
struct cldma_gpd *gpd; /* Virtual address for CPU */
dma_addr_t gpd_addr; /* Physical address for DMA */
@@ -82,6 +91,7 @@ struct cldma_queue {
wait_queue_head_t req_wq; /* Only for TX */
struct workqueue_struct *worker;
struct work_struct cldma_work;
+ int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb);
};

struct cldma_ctrl {
@@ -101,24 +111,22 @@ struct cldma_ctrl {
struct md_pm_entity *pm_entity;
struct t7xx_cldma_hw hw_info;
bool is_late_init;
- int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb);
};

+#define CLDMA_Q_IDX_DUMP 1
#define GPD_FLAGS_HWO BIT(0)
#define GPD_FLAGS_IOC BIT(7)
#define GPD_DMAPOOL_ALIGN 16

-#define CLDMA_MTU 3584 /* 3.5kB */
-
int t7xx_cldma_alloc(enum cldma_id hif_id, struct t7xx_pci_dev *t7xx_dev);
void t7xx_cldma_hif_hw_init(struct cldma_ctrl *md_ctrl);
int t7xx_cldma_init(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_exit(struct cldma_ctrl *md_ctrl);
-void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl);
+void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl, enum cldma_cfg cfg_id);
void t7xx_cldma_start(struct cldma_ctrl *md_ctrl);
int t7xx_cldma_stop(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_reset(struct cldma_ctrl *md_ctrl);
-void t7xx_cldma_set_recv_skb(struct cldma_ctrl *md_ctrl,
+void t7xx_cldma_set_recv_skb(struct cldma_queue *queue,
int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb));
int t7xx_cldma_send_skb(struct cldma_ctrl *md_ctrl, int qno, struct sk_buff *skb);
void t7xx_cldma_stop_all_qs(struct cldma_ctrl *md_ctrl, enum mtk_txrx tx_rx);
diff --git a/drivers/net/wwan/t7xx/t7xx_modem_ops.c b/drivers/net/wwan/t7xx/t7xx_modem_ops.c
index ca262d2961ed..fd79a2a1cc6f 100644
--- a/drivers/net/wwan/t7xx/t7xx_modem_ops.c
+++ b/drivers/net/wwan/t7xx/t7xx_modem_ops.c
@@ -535,7 +535,7 @@ static void t7xx_md_hk_wq(struct work_struct *work)

/* Clear the HS2 EXIT event appended in core_reset() */
t7xx_fsm_clr_event(ctl, FSM_EVENT_MD_HS2_EXIT);
- t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_MD]);
+ t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_MD], CLDMA_SHARED_Q_CFG);
t7xx_cldma_start(md->md_ctrl[CLDMA_ID_MD]);
t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_FOR_HS2);
md->core_md.handshake_ongoing = true;
@@ -550,7 +550,7 @@ static void t7xx_ap_hk_wq(struct work_struct *work)
/* Clear the HS2 EXIT event appended in t7xx_core_reset(). */
t7xx_fsm_clr_event(ctl, FSM_EVENT_AP_HS2_EXIT);
t7xx_cldma_stop(md->md_ctrl[CLDMA_ID_AP]);
- t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_AP]);
+ t7xx_cldma_switch_cfg(md->md_ctrl[CLDMA_ID_AP], CLDMA_SHARED_Q_CFG);
t7xx_cldma_start(md->md_ctrl[CLDMA_ID_AP]);
md->core_ap.handshake_ongoing = true;
t7xx_core_hk_handler(md, &md->core_ap, ctl, FSM_EVENT_AP_HS2, FSM_EVENT_AP_HS2_EXIT);
diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index 1a10afd948c7..06e97778fd2f 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -183,7 +183,7 @@ static int t7xx_pci_pm_init(struct t7xx_pci_dev *t7xx_dev)
pm_runtime_set_autosuspend_delay(&pdev->dev, PM_AUTOSUSPEND_MS);
pm_runtime_use_autosuspend(&pdev->dev);

- return t7xx_wait_pm_config(t7xx_dev);
+ return 0;
}

void t7xx_pci_pm_init_late(struct t7xx_pci_dev *t7xx_dev)
diff --git a/drivers/net/wwan/t7xx/t7xx_port.h b/drivers/net/wwan/t7xx/t7xx_port.h
index 4ae8a00a8532..f74d3bab810d 100644
--- a/drivers/net/wwan/t7xx/t7xx_port.h
+++ b/drivers/net/wwan/t7xx/t7xx_port.h
@@ -75,6 +75,8 @@ enum port_ch {
PORT_CH_DSS6_TX = 0x20df,
PORT_CH_DSS7_RX = 0x20e0,
PORT_CH_DSS7_TX = 0x20e1,
+
+ PORT_CH_UNIMPORTANT = 0xffff,
};

struct t7xx_port;
@@ -135,11 +137,13 @@ struct t7xx_port {
};
};

+int t7xx_get_port_mtu(struct t7xx_port *port);
struct sk_buff *t7xx_port_alloc_skb(int payload);
struct sk_buff *t7xx_ctrl_alloc_skb(int payload);
int t7xx_port_enqueue_skb(struct t7xx_port *port, struct sk_buff *skb);
int t7xx_port_send_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int pkt_header,
unsigned int ex_msg);
+int t7xx_port_send_raw_skb(struct t7xx_port *port, struct sk_buff *skb);
int t7xx_port_send_ctl_skb(struct t7xx_port *port, struct sk_buff *skb, unsigned int msg,
unsigned int ex_msg);

diff --git a/drivers/net/wwan/t7xx/t7xx_port_proxy.c b/drivers/net/wwan/t7xx/t7xx_port_proxy.c
index 274846d39fbf..e53a152faee4 100644
--- a/drivers/net/wwan/t7xx/t7xx_port_proxy.c
+++ b/drivers/net/wwan/t7xx/t7xx_port_proxy.c
@@ -48,6 +48,9 @@
i < (proxy)->port_count; \
i++, (p) = &(proxy)->ports[i])

+#define T7XX_MAX_POSSIBLE_PORTS_NUM \
+ (max(ARRAY_SIZE(t7xx_port_conf), ARRAY_SIZE(t7xx_early_port_conf)))
+
static const struct t7xx_port_conf t7xx_port_conf[] = {
{
.tx_ch = PORT_CH_UART2_TX,
@@ -100,6 +103,18 @@ static const struct t7xx_port_conf t7xx_port_conf[] = {
},
};

+static const struct t7xx_port_conf t7xx_early_port_conf[] = {
+ {
+ .tx_ch = PORT_CH_UNIMPORTANT,
+ .rx_ch = PORT_CH_UNIMPORTANT,
+ .txq_index = CLDMA_Q_IDX_DUMP,
+ .rxq_index = CLDMA_Q_IDX_DUMP,
+ .txq_exp_index = CLDMA_Q_IDX_DUMP,
+ .rxq_exp_index = CLDMA_Q_IDX_DUMP,
+ .path_id = CLDMA_ID_AP,
+ },
+};
+
static struct t7xx_port *t7xx_proxy_get_port_by_ch(struct port_proxy *port_prox, enum port_ch ch)
{
const struct t7xx_port_conf *port_conf;
@@ -214,7 +229,17 @@ int t7xx_port_enqueue_skb(struct t7xx_port *port, struct sk_buff *skb)
return 0;
}

-static int t7xx_port_send_raw_skb(struct t7xx_port *port, struct sk_buff *skb)
+int t7xx_get_port_mtu(struct t7xx_port *port)
+{
+ enum cldma_id path_id = port->port_conf->path_id;
+ int tx_qno = t7xx_port_get_queue_no(port);
+ struct cldma_ctrl *md_ctrl;
+
+ md_ctrl = port->t7xx_dev->md->md_ctrl[path_id];
+ return md_ctrl->tx_ring[tx_qno].pkt_size;
+}
+
+int t7xx_port_send_raw_skb(struct t7xx_port *port, struct sk_buff *skb)
{
enum cldma_id path_id = port->port_conf->path_id;
struct cldma_ctrl *md_ctrl;
@@ -329,6 +354,39 @@ static void t7xx_proxy_setup_ch_mapping(struct port_proxy *port_prox)
}
}

+/**
+ * t7xx_port_proxy_recv_skb_from_dedicated_queue() - Dispatch early port received skb.
+ * @queue: CLDMA queue.
+ * @skb: Socket buffer.
+ *
+ * Return:
+ ** 0 - Packet consumed.
+ ** -ERROR - Failed to process skb.
+ */
+int t7xx_port_proxy_recv_skb_from_dedicated_queue(struct cldma_queue *queue, struct sk_buff *skb)
+{
+ struct t7xx_pci_dev *t7xx_dev = queue->md_ctrl->t7xx_dev;
+ struct port_proxy *port_prox = t7xx_dev->md->port_prox;
+ const struct t7xx_port_conf *port_conf;
+ struct t7xx_port *port;
+ int ret;
+
+ port = &port_prox->ports[0];
+ if (WARN_ON_ONCE(port->port_conf->rxq_index != queue->index)) {
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ port_conf = port->port_conf;
+ ret = port_conf->ops->recv_skb(port, skb);
+ if (ret < 0 && ret != -ENOBUFS) {
+ dev_err(port->dev, "drop on RX ch %d, %d\n", port_conf->rx_ch, ret);
+ dev_kfree_skb_any(skb);
+ }
+
+ return ret;
+}
+
static struct t7xx_port *t7xx_port_proxy_find_port(struct t7xx_pci_dev *t7xx_dev,
struct cldma_queue *queue, u16 channel)
{
@@ -359,7 +417,7 @@ static struct t7xx_port *t7xx_port_proxy_find_port(struct t7xx_pci_dev *t7xx_dev
** 0 - Packet consumed.
** -ERROR - Failed to process skb.
*/
-static int t7xx_port_proxy_recv_skb(struct cldma_queue *queue, struct sk_buff *skb)
+int t7xx_port_proxy_recv_skb(struct cldma_queue *queue, struct sk_buff *skb)
{
struct ccci_header *ccci_h = (struct ccci_header *)skb->data;
struct t7xx_pci_dev *t7xx_dev = queue->md_ctrl->t7xx_dev;
@@ -444,33 +502,54 @@ static void t7xx_proxy_init_all_ports(struct t7xx_modem *md)
spin_lock_init(&port->port_update_lock);
port->chan_enable = false;

- if (port_conf->ops->init)
+ if (port_conf->ops && port_conf->ops->init)
port_conf->ops->init(port);
}

t7xx_proxy_setup_ch_mapping(port_prox);
}

+void t7xx_port_proxy_set_cfg(struct t7xx_modem *md, enum port_cfg_id cfg_id)
+{
+ struct port_proxy *port_prox = md->port_prox;
+ const struct t7xx_port_conf *port_conf;
+ u32 port_count;
+ int i;
+
+ t7xx_port_proxy_uninit(port_prox);
+
+ if (cfg_id == PORT_CFG_ID_EARLY) {
+ port_conf = t7xx_early_port_conf;
+ port_count = ARRAY_SIZE(t7xx_early_port_conf);
+ } else {
+ port_conf = t7xx_port_conf;
+ port_count = ARRAY_SIZE(t7xx_port_conf);
+ }
+
+ for (i = 0; i < port_count; i++)
+ port_prox->ports[i].port_conf = &port_conf[i];
+
+ port_prox->cfg_id = cfg_id;
+ port_prox->port_count = port_count;
+
+ t7xx_proxy_init_all_ports(md);
+}
+
static int t7xx_proxy_alloc(struct t7xx_modem *md)
{
- unsigned int port_count = ARRAY_SIZE(t7xx_port_conf);
struct device *dev = &md->t7xx_dev->pdev->dev;
struct port_proxy *port_prox;
- int i;

- port_prox = devm_kzalloc(dev, sizeof(*port_prox) + sizeof(struct t7xx_port) * port_count,
+ port_prox = devm_kzalloc(dev, sizeof(*port_prox) +
+ sizeof(struct t7xx_port) * T7XX_MAX_POSSIBLE_PORTS_NUM,
GFP_KERNEL);
if (!port_prox)
return -ENOMEM;

md->port_prox = port_prox;
port_prox->dev = dev;
+ t7xx_port_proxy_set_cfg(md, PORT_CFG_ID_EARLY);

- for (i = 0; i < port_count; i++)
- port_prox->ports[i].port_conf = &t7xx_port_conf[i];
-
- port_prox->port_count = port_count;
- t7xx_proxy_init_all_ports(md);
return 0;
}

@@ -492,8 +571,6 @@ int t7xx_port_proxy_init(struct t7xx_modem *md)
if (ret)
return ret;

- t7xx_cldma_set_recv_skb(md->md_ctrl[CLDMA_ID_AP], t7xx_port_proxy_recv_skb);
- t7xx_cldma_set_recv_skb(md->md_ctrl[CLDMA_ID_MD], t7xx_port_proxy_recv_skb);
return 0;
}

@@ -505,7 +582,7 @@ void t7xx_port_proxy_uninit(struct port_proxy *port_prox)
for_each_proxy_port(i, port, port_prox) {
const struct t7xx_port_conf *port_conf = port->port_conf;

- if (port_conf->ops->uninit)
+ if (port_conf->ops && port_conf->ops->uninit)
port_conf->ops->uninit(port);
}
}
diff --git a/drivers/net/wwan/t7xx/t7xx_port_proxy.h b/drivers/net/wwan/t7xx/t7xx_port_proxy.h
index 81d059fbc0fb..7f5706811445 100644
--- a/drivers/net/wwan/t7xx/t7xx_port_proxy.h
+++ b/drivers/net/wwan/t7xx/t7xx_port_proxy.h
@@ -31,11 +31,18 @@
#define RX_QUEUE_MAXLEN 32
#define CTRL_QUEUE_MAXLEN 16

+enum port_cfg_id {
+ PORT_CFG_ID_INVALID,
+ PORT_CFG_ID_NORMAL,
+ PORT_CFG_ID_EARLY,
+};
+
struct port_proxy {
int port_count;
struct list_head rx_ch_ports[PORT_CH_ID_MASK + 1];
struct list_head queue_ports[CLDMA_NUM][MTK_QUEUES];
struct device *dev;
+ enum port_cfg_id cfg_id;
struct t7xx_port ports[];
};

@@ -98,5 +105,8 @@ void t7xx_port_proxy_md_status_notify(struct port_proxy *port_prox, unsigned int
int t7xx_port_enum_msg_handler(struct t7xx_modem *md, void *msg);
int t7xx_port_proxy_chl_enable_disable(struct port_proxy *port_prox, unsigned int ch_id,
bool en_flag);
+void t7xx_port_proxy_set_cfg(struct t7xx_modem *md, enum port_cfg_id cfg_id);
+int t7xx_port_proxy_recv_skb(struct cldma_queue *queue, struct sk_buff *skb);
+int t7xx_port_proxy_recv_skb_from_dedicated_queue(struct cldma_queue *queue, struct sk_buff *skb);

#endif /* __T7XX_PORT_PROXY_H__ */
diff --git a/drivers/net/wwan/t7xx/t7xx_port_wwan.c b/drivers/net/wwan/t7xx/t7xx_port_wwan.c
index 17389c8f6600..ddc20ddfa734 100644
--- a/drivers/net/wwan/t7xx/t7xx_port_wwan.c
+++ b/drivers/net/wwan/t7xx/t7xx_port_wwan.c
@@ -152,14 +152,15 @@ static int t7xx_port_wwan_disable_chl(struct t7xx_port *port)
static void t7xx_port_wwan_md_state_notify(struct t7xx_port *port, unsigned int state)
{
const struct t7xx_port_conf *port_conf = port->port_conf;
- unsigned int header_len = sizeof(struct ccci_header);
+ unsigned int header_len = sizeof(struct ccci_header), mtu;
struct wwan_port_caps caps;

if (state != MD_STATE_READY)
return;

if (!port->wwan.wwan_port) {
- caps.frag_len = CLDMA_MTU - header_len;
+ mtu = t7xx_get_port_mtu(port);
+ caps.frag_len = mtu - header_len;
caps.headroom_len = header_len;
port->wwan.wwan_port = wwan_create_port(port->dev, port_conf->port_type,
&wwan_ops, &caps, port);
diff --git a/drivers/net/wwan/t7xx/t7xx_reg.h b/drivers/net/wwan/t7xx/t7xx_reg.h
index c41d7d094c08..9c7dc72ac6f6 100644
--- a/drivers/net/wwan/t7xx/t7xx_reg.h
+++ b/drivers/net/wwan/t7xx/t7xx_reg.h
@@ -101,11 +101,33 @@ enum t7xx_pm_resume_state {
PM_RESUME_REG_STATE_L2_EXP,
};

+enum host_event_e {
+ HOST_EVENT_INIT = 0,
+ FASTBOOT_DL_NOTIFY = 0x3,
+};
+
#define T7XX_PCIE_MISC_DEV_STATUS 0x0d1c
#define MISC_STAGE_MASK GENMASK(2, 0)
#define MISC_RESET_TYPE_PLDR BIT(26)
#define MISC_RESET_TYPE_FLDR BIT(27)
-#define LINUX_STAGE 4
+#define MISC_RESET_TYPE_PLDR BIT(26)
+#define MISC_LK_EVENT_MASK GENMASK(11, 8)
+#define HOST_EVENT_MASK GENMASK(31, 28)
+
+enum lk_event_id {
+ LK_EVENT_NORMAL = 0,
+ LK_EVENT_CREATE_PD_PORT = 1,
+ LK_EVENT_CREATE_POST_DL_PORT = 2,
+ LK_EVENT_RESET = 7,
+};
+
+enum t7xx_device_stage {
+ T7XX_DEV_STAGE_INIT = 0,
+ T7XX_DEV_STAGE_BROM_PRE = 1,
+ T7XX_DEV_STAGE_BROM_POST = 2,
+ T7XX_DEV_STAGE_LK = 3,
+ T7XX_DEV_STAGE_LINUX = 4,
+};

#define T7XX_PCIE_RESOURCE_STATUS 0x0d28
#define T7XX_PCIE_RESOURCE_STS_MSK GENMASK(4, 0)
diff --git a/drivers/net/wwan/t7xx/t7xx_state_monitor.c b/drivers/net/wwan/t7xx/t7xx_state_monitor.c
index c5d46f45fa62..b98ad4a1709b 100644
--- a/drivers/net/wwan/t7xx/t7xx_state_monitor.c
+++ b/drivers/net/wwan/t7xx/t7xx_state_monitor.c
@@ -47,6 +47,13 @@
#define FSM_MD_EX_PASS_TIMEOUT_MS 45000
#define FSM_CMD_TIMEOUT_MS 2000

+#define wait_for_expected_dev_stage(status) \
+ read_poll_timeout(ioread32, status, \
+ ((status & MISC_STAGE_MASK) == T7XX_DEV_STAGE_LINUX) || \
+ ((status & MISC_STAGE_MASK) == T7XX_DEV_STAGE_LK), 100000, \
+ 20000000, false, IREG_BASE(md->t7xx_dev) + \
+ T7XX_PCIE_MISC_DEV_STATUS)
+
void t7xx_fsm_notifier_register(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier)
{
struct t7xx_fsm_ctl *ctl = md->fsm_ctl;
@@ -206,6 +213,51 @@ static void fsm_routine_exception(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_comm
fsm_finish_command(ctl, cmd, 0);
}

+static void t7xx_host_event_notify(struct t7xx_modem *md, unsigned int event_id)
+{
+ u32 value;
+
+ value = ioread32(IREG_BASE(md->t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS);
+ value &= ~HOST_EVENT_MASK;
+ value |= FIELD_PREP(HOST_EVENT_MASK, event_id);
+ iowrite32(value, IREG_BASE(md->t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS);
+}
+
+static void t7xx_lk_stage_event_handling(struct t7xx_fsm_ctl *ctl, unsigned int status)
+{
+ struct t7xx_modem *md = ctl->md;
+ struct cldma_ctrl *md_ctrl;
+ enum lk_event_id lk_event;
+ struct device *dev;
+
+ dev = &md->t7xx_dev->pdev->dev;
+ lk_event = FIELD_GET(MISC_LK_EVENT_MASK, status);
+ switch (lk_event) {
+ case LK_EVENT_NORMAL:
+ case LK_EVENT_RESET:
+ break;
+
+ case LK_EVENT_CREATE_PD_PORT:
+ case LK_EVENT_CREATE_POST_DL_PORT:
+ md_ctrl = md->md_ctrl[CLDMA_ID_AP];
+ t7xx_cldma_hif_hw_init(md_ctrl);
+ t7xx_cldma_stop(md_ctrl);
+ t7xx_cldma_switch_cfg(md_ctrl, CLDMA_DEDICATED_Q_CFG);
+
+ t7xx_cldma_start(md_ctrl);
+
+ if (lk_event == LK_EVENT_CREATE_POST_DL_PORT)
+ t7xx_mode_update(md->t7xx_dev, T7XX_FASTBOOT_DL_MODE);
+ else
+ t7xx_mode_update(md->t7xx_dev, T7XX_FASTBOOT_DUMP_MODE);
+ break;
+
+ default:
+ dev_err(dev, "Invalid LK event %d\n", lk_event);
+ break;
+ }
+}
+
static int fsm_stopped_handler(struct t7xx_fsm_ctl *ctl)
{
ctl->curr_state = FSM_STATE_STOPPED;
@@ -226,27 +278,32 @@ static void fsm_routine_stopped(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_comman

static void fsm_routine_stopping(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd)
{
- struct t7xx_pci_dev *t7xx_dev;
- struct cldma_ctrl *md_ctrl;
+ struct cldma_ctrl *md_ctrl = ctl->md->md_ctrl[CLDMA_ID_MD];
+ struct t7xx_pci_dev *t7xx_dev = ctl->md->t7xx_dev;
+ u32 mode = READ_ONCE(t7xx_dev->mode);
int err;

- if (ctl->curr_state == FSM_STATE_STOPPED || ctl->curr_state == FSM_STATE_STOPPING) {
+ if (ctl->curr_state == FSM_STATE_STOPPED ||
+ ctl->curr_state == FSM_STATE_STOPPING ||
+ mode == T7XX_RESET) {
fsm_finish_command(ctl, cmd, -EINVAL);
return;
}

- md_ctrl = ctl->md->md_ctrl[CLDMA_ID_MD];
- t7xx_dev = ctl->md->t7xx_dev;
-
ctl->curr_state = FSM_STATE_STOPPING;
t7xx_fsm_broadcast_state(ctl, MD_STATE_WAITING_TO_STOP);
t7xx_cldma_stop(md_ctrl);

- if (!ctl->md->rgu_irq_asserted) {
- t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DRM_DISABLE_AP);
- /* Wait for the DRM disable to take effect */
- msleep(FSM_DRM_DISABLE_DELAY_MS);
+ if (mode == T7XX_FASTBOOT_DL_SWITCHING)
+ t7xx_host_event_notify(ctl->md, FASTBOOT_DL_NOTIFY);
+
+ t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DRM_DISABLE_AP);
+ /* Wait for the DRM disable to take effect */
+ msleep(FSM_DRM_DISABLE_DELAY_MS);

+ if (mode == T7XX_FASTBOOT_DL_SWITCHING) {
+ t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DEVICE_RESET);
+ } else {
err = t7xx_acpi_fldr_func(t7xx_dev);
if (err)
t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_DEVICE_RESET);
@@ -318,7 +375,8 @@ static int fsm_routine_starting(struct t7xx_fsm_ctl *ctl)
static void fsm_routine_start(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command *cmd)
{
struct t7xx_modem *md = ctl->md;
- u32 dev_status;
+ struct device *dev;
+ u32 status;
int ret;

if (!md)
@@ -330,23 +388,53 @@ static void fsm_routine_start(struct t7xx_fsm_ctl *ctl, struct t7xx_fsm_command
return;
}

+ dev = &md->t7xx_dev->pdev->dev;
ctl->curr_state = FSM_STATE_PRE_START;
t7xx_md_event_notify(md, FSM_PRE_START);

- ret = read_poll_timeout(ioread32, dev_status,
- (dev_status & MISC_STAGE_MASK) == LINUX_STAGE, 20000, 2000000,
- false, IREG_BASE(md->t7xx_dev) + T7XX_PCIE_MISC_DEV_STATUS);
+ ret = wait_for_expected_dev_stage(status);
+
if (ret) {
- struct device *dev = &md->t7xx_dev->pdev->dev;
+ dev_err(dev, "read poll timeout %d\n", ret);
+ goto finish_command;
+ }

- fsm_finish_command(ctl, cmd, -ETIMEDOUT);
- dev_err(dev, "Invalid device status 0x%lx\n", dev_status & MISC_STAGE_MASK);
- return;
+ if (status != ctl->status || cmd->flag != 0) {
+ u32 stage = FIELD_GET(MISC_STAGE_MASK, status);
+
+ switch (stage) {
+ case T7XX_DEV_STAGE_INIT:
+ case T7XX_DEV_STAGE_BROM_PRE:
+ case T7XX_DEV_STAGE_BROM_POST:
+ dev_dbg(dev, "BROM_STAGE Entered\n");
+ ret = t7xx_fsm_append_cmd(ctl, FSM_CMD_START, 0);
+ break;
+
+ case T7XX_DEV_STAGE_LK:
+ dev_dbg(dev, "LK_STAGE Entered\n");
+ t7xx_lk_stage_event_handling(ctl, status);
+ break;
+
+ case T7XX_DEV_STAGE_LINUX:
+ dev_dbg(dev, "LINUX_STAGE Entered\n");
+ t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_PORT_ENUM |
+ D2H_INT_ASYNC_MD_HK | D2H_INT_ASYNC_AP_HK);
+ if (cmd->flag == 0)
+ break;
+ t7xx_cldma_hif_hw_init(md->md_ctrl[CLDMA_ID_AP]);
+ t7xx_cldma_hif_hw_init(md->md_ctrl[CLDMA_ID_MD]);
+ t7xx_port_proxy_set_cfg(md, PORT_CFG_ID_NORMAL);
+ ret = fsm_routine_starting(ctl);
+ break;
+
+ default:
+ break;
+ }
+ ctl->status = status;
}

- t7xx_cldma_hif_hw_init(md->md_ctrl[CLDMA_ID_AP]);
- t7xx_cldma_hif_hw_init(md->md_ctrl[CLDMA_ID_MD]);
- fsm_finish_command(ctl, cmd, fsm_routine_starting(ctl));
+finish_command:
+ fsm_finish_command(ctl, cmd, ret);
}

static int fsm_main_thread(void *data)
@@ -518,6 +606,7 @@ void t7xx_fsm_reset(struct t7xx_modem *md)
fsm_flush_event_cmd_qs(ctl);
ctl->curr_state = FSM_STATE_STOPPED;
ctl->exp_flg = false;
+ ctl->status = T7XX_DEV_STAGE_INIT;
}

int t7xx_fsm_init(struct t7xx_modem *md)
diff --git a/drivers/net/wwan/t7xx/t7xx_state_monitor.h b/drivers/net/wwan/t7xx/t7xx_state_monitor.h
index b0b3662ae6d7..7b0a9baf488c 100644
--- a/drivers/net/wwan/t7xx/t7xx_state_monitor.h
+++ b/drivers/net/wwan/t7xx/t7xx_state_monitor.h
@@ -96,6 +96,7 @@ struct t7xx_fsm_ctl {
bool exp_flg;
spinlock_t notifier_lock; /* Protects notifier list */
struct list_head notifier_list;
+ u32 status; /* Device boot stage */
};

struct t7xx_fsm_event {
--
2.34.1