Re: [PATCH net-next 1/5] net: wwan: t7xx: Add AP CLDMA
From: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Date: 2022-08-30 01:54:07
On Tue, Aug 16, 2022 at 7:11 AM [off-list ref] wrote:
From: Haijun Liu <haijun.liu@mediatek.com> The t7xx device contains two Cross Layer DMA (CLDMA) interfaces to communicate with AP and Modem processors respectively. So far only MD-CLDMA was being used, this patch enables AP-CLDMA. Rename small Application Processor (sAP) to AP. Signed-off-by: Haijun Liu <haijun.liu@mediatek.com> Co-developed-by: Madhusmita Sahu <redacted> Signed-off-by: Madhusmita Sahu <redacted> Signed-off-by: Moises Veleta <redacted> Signed-off-by: Devegowda Chandrashekar <chandrashekar.devegowda@intel.com> Signed-off-by: M Chetan Kumar <redacted> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> And just one nitpick/question below.
quoted hunk ↗ jump to hunk
diff --git a/drivers/net/wwan/t7xx/t7xx_modem_ops.c b/drivers/net/wwan/t7xx/t7xx_modem_ops.c index 3458af31e864..c5a3c95004bd 100644 --- a/drivers/net/wwan/t7xx/t7xx_modem_ops.c +++ b/drivers/net/wwan/t7xx/t7xx_modem_ops.c@@ -44,6 +44,7 @@ #include "t7xx_state_monitor.h" #define RT_ID_MD_PORT_ENUM 0 +#define RT_ID_AP_PORT_ENUM 1 /* Modem feature query identification code - "ICCC" */ #define MD_FEATURE_QUERY_ID 0x49434343@@ -296,6 +297,7 @@ static void t7xx_md_exception(struct t7xx_modem *md, enum hif_ex_stage stage) } t7xx_cldma_exception(md->md_ctrl[CLDMA_ID_MD], stage); + t7xx_cldma_exception(md->md_ctrl[CLDMA_ID_AP], stage); if (stage == HIF_EX_INIT) t7xx_mhccif_h2d_swint_trigger(t7xx_dev, H2D_CH_EXCEPTION_ACK);@@ -424,7 +426,7 @@ static int t7xx_parse_host_rt_data(struct t7xx_fsm_ctl *ctl, struct t7xx_sys_inf if (ft_spt_st != MTK_FEATURE_MUST_BE_SUPPORTED) return -EINVAL; - if (i == RT_ID_MD_PORT_ENUM) + if (i == RT_ID_MD_PORT_ENUM || i == RT_ID_AP_PORT_ENUM) t7xx_port_enum_msg_handler(ctl->md, rt_feature->data); }@@ -454,12 +456,12 @@ static int t7xx_core_reset(struct t7xx_modem *md) return 0; } -static void t7xx_core_hk_handler(struct t7xx_modem *md, struct t7xx_fsm_ctl *ctl, +static void t7xx_core_hk_handler(struct t7xx_modem *md, struct t7xx_sys_info *core_info, + struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id, enum t7xx_fsm_event_state err_detect) { struct t7xx_fsm_event *event = NULL, *event_next; - struct t7xx_sys_info *core_info = &md->core_md; struct device *dev = &md->t7xx_dev->pdev->dev; unsigned long flags; int ret;@@ -529,19 +531,33 @@ static void t7xx_md_hk_wq(struct work_struct *work) 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; - t7xx_core_hk_handler(md, ctl, FSM_EVENT_MD_HS2, FSM_EVENT_MD_HS2_EXIT); + t7xx_core_hk_handler(md, &md->core_md, ctl, FSM_EVENT_MD_HS2, FSM_EVENT_MD_HS2_EXIT); +} + +static void t7xx_ap_hk_wq(struct work_struct *work) +{ + struct t7xx_modem *md = container_of(work, struct t7xx_modem, ap_handshake_work); + struct t7xx_fsm_ctl *ctl = md->fsm_ctl; + + /* 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_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); } void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id) { struct t7xx_fsm_ctl *ctl = md->fsm_ctl; - void __iomem *mhccif_base; unsigned int int_sta; unsigned long flags; switch (evt_id) { case FSM_PRE_START: - t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_PORT_ENUM); + t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_PORT_ENUM | D2H_INT_ASYNC_MD_HK | + D2H_INT_ASYNC_AP_HK); break; case FSM_START:@@ -554,16 +570,26 @@ void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id) ctl->exp_flg = true; md->exp_id &= ~D2H_INT_EXCEPTION_INIT; md->exp_id &= ~D2H_INT_ASYNC_MD_HK; + md->exp_id &= ~D2H_INT_ASYNC_AP_HK; } else if (ctl->exp_flg) { md->exp_id &= ~D2H_INT_ASYNC_MD_HK; - } else if (md->exp_id & D2H_INT_ASYNC_MD_HK) { - queue_work(md->handshake_wq, &md->handshake_work); - md->exp_id &= ~D2H_INT_ASYNC_MD_HK; - mhccif_base = md->t7xx_dev->base_addr.mhccif_rc_base; - iowrite32(D2H_INT_ASYNC_MD_HK, mhccif_base + REG_EP2RC_SW_INT_ACK); - t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); + md->exp_id &= ~D2H_INT_ASYNC_AP_HK; } else { - t7xx_mhccif_mask_clr(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); + void __iomem *mhccif_base = md->t7xx_dev->base_addr.mhccif_rc_base; + + if (md->exp_id & D2H_INT_ASYNC_MD_HK) { + queue_work(md->handshake_wq, &md->handshake_work); + md->exp_id &= ~D2H_INT_ASYNC_MD_HK; + iowrite32(D2H_INT_ASYNC_MD_HK, mhccif_base + REG_EP2RC_SW_INT_ACK); + t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); + } + + if (md->exp_id & D2H_INT_ASYNC_AP_HK) { + queue_work(md->ap_handshake_wq, &md->ap_handshake_work); + md->exp_id &= ~D2H_INT_ASYNC_AP_HK; + iowrite32(D2H_INT_ASYNC_AP_HK, mhccif_base + REG_EP2RC_SW_INT_ACK); + t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_AP_HK); + } } spin_unlock_irqrestore(&md->exp_lock, flags);@@ -576,6 +602,7 @@ void t7xx_md_event_notify(struct t7xx_modem *md, enum md_event_id evt_id) case FSM_READY: t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_MD_HK); + t7xx_mhccif_mask_set(md->t7xx_dev, D2H_INT_ASYNC_AP_HK); break; default:@@ -627,6 +654,19 @@ static struct t7xx_modem *t7xx_md_alloc(struct t7xx_pci_dev *t7xx_dev) md->core_md.feature_set[RT_ID_MD_PORT_ENUM] &= ~FEATURE_MSK; md->core_md.feature_set[RT_ID_MD_PORT_ENUM] |= FIELD_PREP(FEATURE_MSK, MTK_FEATURE_MUST_BE_SUPPORTED); + + md->ap_handshake_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI, + 0, "ap_hk_wq"); + if (!md->ap_handshake_wq) { + destroy_workqueue(md->handshake_wq); + return NULL; + } + + INIT_WORK(&md->ap_handshake_work, t7xx_ap_hk_wq); + md->core_ap.feature_set[RT_ID_AP_PORT_ENUM] &= ~FEATURE_MSK; + md->core_ap.feature_set[RT_ID_AP_PORT_ENUM] |= + FIELD_PREP(FEATURE_MSK, MTK_FEATURE_MUST_BE_SUPPORTED); + return md; }@@ -638,6 +678,7 @@ int t7xx_md_reset(struct t7xx_pci_dev *t7xx_dev) md->exp_id = 0; t7xx_fsm_reset(md); t7xx_cldma_reset(md->md_ctrl[CLDMA_ID_MD]); + t7xx_cldma_reset(md->md_ctrl[CLDMA_ID_AP]); t7xx_port_proxy_reset(md->port_prox); md->md_init_finish = true; return t7xx_core_reset(md);@@ -667,6 +708,10 @@ int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev) if (ret) goto err_destroy_hswq; + ret = t7xx_cldma_alloc(CLDMA_ID_AP, t7xx_dev); + if (ret) + goto err_destroy_hswq; + ret = t7xx_fsm_init(md); if (ret) goto err_destroy_hswq;@@ -679,12 +724,16 @@ int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev) if (ret) goto err_uninit_ccmni; - ret = t7xx_port_proxy_init(md); + ret = t7xx_cldma_init(md->md_ctrl[CLDMA_ID_AP]); if (ret) goto err_uninit_md_cldma; + ret = t7xx_port_proxy_init(md); + if (ret) + goto err_uninit_ap_cldma; + ret = t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_START, 0); - if (ret) /* fsm_uninit flushes cmd queue */ + if (ret) /* t7xx_fsm_uninit() flushes cmd queue */ goto err_uninit_proxy; t7xx_md_sys_sw_init(t7xx_dev);@@ -694,6 +743,9 @@ int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev) err_uninit_proxy: t7xx_port_proxy_uninit(md->port_prox); +err_uninit_ap_cldma: + t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_AP]); + err_uninit_md_cldma: t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_MD]);@@ -705,6 +757,7 @@ int t7xx_md_init(struct t7xx_pci_dev *t7xx_dev) err_destroy_hswq: destroy_workqueue(md->handshake_wq); + destroy_workqueue(md->ap_handshake_wq); dev_err(&t7xx_dev->pdev->dev, "Modem init failed\n"); return ret; }@@ -720,8 +773,10 @@ void t7xx_md_exit(struct t7xx_pci_dev *t7xx_dev) t7xx_fsm_append_cmd(md->fsm_ctl, FSM_CMD_PRE_STOP, FSM_CMD_FLAG_WAIT_FOR_COMPLETION); t7xx_port_proxy_uninit(md->port_prox); + t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_AP]); t7xx_cldma_exit(md->md_ctrl[CLDMA_ID_MD]); t7xx_ccmni_exit(t7xx_dev); t7xx_fsm_uninit(md); destroy_workqueue(md->handshake_wq); + destroy_workqueue(md->ap_handshake_wq); }diff --git a/drivers/net/wwan/t7xx/t7xx_modem_ops.h b/drivers/net/wwan/t7xx/t7xx_modem_ops.h index 7469ed636ae8..c93e870ce696 100644 --- a/drivers/net/wwan/t7xx/t7xx_modem_ops.h +++ b/drivers/net/wwan/t7xx/t7xx_modem_ops.h@@ -66,10 +66,13 @@ struct t7xx_modem { struct cldma_ctrl *md_ctrl[CLDMA_NUM]; struct t7xx_pci_dev *t7xx_dev; struct t7xx_sys_info core_md; + struct t7xx_sys_info core_ap; bool md_init_finish; bool rgu_irq_asserted; struct workqueue_struct *handshake_wq; struct work_struct handshake_work; + struct workqueue_struct *ap_handshake_wq;
Does the driver really need this dedicated workqueue for the AP handshake? Or can the existing handshake workqueue be reused for the AP handshake work scheduling too?
+ struct work_struct ap_handshake_work;
struct t7xx_fsm_ctl *fsm_ctl;
struct port_proxy *port_prox;
unsigned int exp_id;-- Sergey