diff options
Diffstat (limited to 'drivers/net/ipa/ipa_main.c')
| -rw-r--r-- | drivers/net/ipa/ipa_main.c | 184 |
1 files changed, 56 insertions, 128 deletions
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c index 9810c61a0320..581b75488c6f 100644 --- a/drivers/net/ipa/ipa_main.c +++ b/drivers/net/ipa/ipa_main.c @@ -80,29 +80,6 @@ #define IPA_XO_CLOCK_DIVIDER 192 /* 1 is subtracted where used */ /** - * ipa_suspend_handler() - Handle the suspend IPA interrupt - * @ipa: IPA pointer - * @irq_id: IPA interrupt type (unused) - * - * If an RX endpoint is in suspend state, and the IPA has a packet - * destined for that endpoint, the IPA generates a SUSPEND interrupt - * to inform the AP that it should resume the endpoint. If we get - * one of these interrupts we just resume everything. - */ -static void ipa_suspend_handler(struct ipa *ipa, enum ipa_irq_id irq_id) -{ - /* Just report the event, and let system resume handle the rest. - * More than one endpoint could signal this; if so, ignore - * all but the first. - */ - if (!test_and_set_bit(IPA_FLAG_RESUMED, ipa->flags)) - pm_wakeup_dev_event(&ipa->pdev->dev, 0, true); - - /* Acknowledge/clear the suspend interrupt on all endpoints */ - ipa_interrupt_suspend_clear_all(ipa->interrupt); -} - -/** * ipa_setup() - Set up IPA hardware * @ipa: IPA pointer * @@ -124,19 +101,11 @@ int ipa_setup(struct ipa *ipa) if (ret) return ret; - ipa->interrupt = ipa_interrupt_setup(ipa); - if (IS_ERR(ipa->interrupt)) { - ret = PTR_ERR(ipa->interrupt); - goto err_gsi_teardown; - } - ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND, - ipa_suspend_handler); - - ipa_uc_setup(ipa); + ipa_power_setup(ipa); ret = device_init_wakeup(dev, true); if (ret) - goto err_uc_teardown; + goto err_gsi_teardown; ipa_endpoint_setup(ipa); @@ -167,7 +136,7 @@ int ipa_setup(struct ipa *ipa) ipa_endpoint_default_route_set(ipa, exception_endpoint->endpoint_id); /* We're all set. Now prepare for communication with the modem */ - ret = ipa_modem_setup(ipa); + ret = ipa_qmi_setup(ipa); if (ret) goto err_default_route_clear; @@ -184,11 +153,8 @@ err_command_disable: ipa_endpoint_disable_one(command_endpoint); err_endpoint_teardown: ipa_endpoint_teardown(ipa); + ipa_power_teardown(ipa); (void)device_init_wakeup(dev, false); -err_uc_teardown: - ipa_uc_teardown(ipa); - ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND); - ipa_interrupt_teardown(ipa->interrupt); err_gsi_teardown: gsi_teardown(&ipa->gsi); @@ -204,17 +170,18 @@ static void ipa_teardown(struct ipa *ipa) struct ipa_endpoint *exception_endpoint; struct ipa_endpoint *command_endpoint; - ipa_modem_teardown(ipa); + /* We're going to tear everything down, as if setup never completed */ + ipa->setup_complete = false; + + ipa_qmi_teardown(ipa); ipa_endpoint_default_route_clear(ipa); exception_endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX]; ipa_endpoint_disable_one(exception_endpoint); command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX]; ipa_endpoint_disable_one(command_endpoint); ipa_endpoint_teardown(ipa); + ipa_power_teardown(ipa); (void)device_init_wakeup(&ipa->pdev->dev, false); - ipa_uc_teardown(ipa); - ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND); - ipa_interrupt_teardown(ipa->interrupt); gsi_teardown(&ipa->gsi); } @@ -253,9 +220,6 @@ ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data) const struct ipa_qsb_data *data1; u32 val; - /* assert(data->qsb_count > 0); */ - /* assert(data->qsb_count < 3); */ - /* QMB 0 represents DDR; QMB 1 (if present) represents PCIe */ data0 = &data->qsb_data[IPA_QSB_MASTER_DDR]; if (data->qsb_count > 1) @@ -289,12 +253,11 @@ ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data) /* Compute the value to use in the COUNTER_CFG register AGGR_GRANULARITY * field to represent the given number of microseconds. The value is one * less than the number of timer ticks in the requested period. 0 is not - * a valid granularity value. + * a valid granularity value (so for example @usec must be at least 16 for + * a TIMER_FREQUENCY of 32000). */ -static u32 ipa_aggr_granularity_val(u32 usec) +static __always_inline u32 ipa_aggr_granularity_val(u32 usec) { - /* assert(usec != 0); */ - return DIV_ROUND_CLOSEST(usec * TIMER_FREQUENCY, USEC_PER_SEC) - 1; } @@ -463,42 +426,48 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data) { int ret; - /* Get a clock reference to allow initialization. This reference - * is held after initialization completes, and won't get dropped - * unless/until a system suspend request arrives. - */ - ipa_clock_get(ipa); - ipa_hardware_config(ipa, data); - ret = ipa_endpoint_config(ipa); + ret = ipa_mem_config(ipa); if (ret) goto err_hardware_deconfig; - ret = ipa_mem_config(ipa); + ipa->interrupt = ipa_interrupt_config(ipa); + if (IS_ERR(ipa->interrupt)) { + ret = PTR_ERR(ipa->interrupt); + ipa->interrupt = NULL; + goto err_mem_deconfig; + } + + ipa_uc_config(ipa); + + ret = ipa_endpoint_config(ipa); if (ret) - goto err_endpoint_deconfig; + goto err_uc_deconfig; ipa_table_config(ipa); /* No deconfig required */ /* Assign resource limitation to each group; no deconfig required */ ret = ipa_resource_config(ipa, data->resource_data); if (ret) - goto err_mem_deconfig; + goto err_endpoint_deconfig; ret = ipa_modem_config(ipa); if (ret) - goto err_mem_deconfig; + goto err_endpoint_deconfig; return 0; -err_mem_deconfig: - ipa_mem_deconfig(ipa); err_endpoint_deconfig: ipa_endpoint_deconfig(ipa); +err_uc_deconfig: + ipa_uc_deconfig(ipa); + ipa_interrupt_deconfig(ipa->interrupt); + ipa->interrupt = NULL; +err_mem_deconfig: + ipa_mem_deconfig(ipa); err_hardware_deconfig: ipa_hardware_deconfig(ipa); - ipa_clock_put(ipa); return ret; } @@ -510,10 +479,12 @@ err_hardware_deconfig: static void ipa_deconfig(struct ipa *ipa) { ipa_modem_deconfig(ipa); - ipa_mem_deconfig(ipa); ipa_endpoint_deconfig(ipa); + ipa_uc_deconfig(ipa); + ipa_interrupt_deconfig(ipa->interrupt); + ipa->interrupt = NULL; + ipa_mem_deconfig(ipa); ipa_hardware_deconfig(ipa); - ipa_clock_put(ipa); } static int ipa_firmware_load(struct device *dev) @@ -612,7 +583,6 @@ MODULE_DEVICE_TABLE(of, ipa_match); * */ static void ipa_validate_build(void) { -#ifdef IPA_VALIDATE /* At one time we assumed a 64-bit build, allowing some do_div() * calls to be replaced by simple division or modulo operations. * We currently only perform divide and modulo operations on u32, @@ -646,7 +616,6 @@ static void ipa_validate_build(void) BUILD_BUG_ON(!ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY)); BUILD_BUG_ON(ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY) > field_max(AGGR_GRANULARITY_FMASK)); -#endif /* IPA_VALIDATE */ } static bool ipa_version_valid(enum ipa_version version) @@ -771,18 +740,23 @@ static int ipa_probe(struct platform_device *pdev) if (ret) goto err_table_exit; + /* The clock needs to be active for config and setup */ + ret = ipa_clock_get(ipa); + if (WARN_ON(ret < 0)) + goto err_clock_put; + ret = ipa_config(ipa, data); if (ret) - goto err_modem_exit; + goto err_clock_put; dev_info(dev, "IPA driver initialized"); /* If the modem is doing early initialization, it will trigger a - * call to ipa_setup() call when it has finished. In that case - * we're done here. + * call to ipa_setup() when it has finished. In that case we're + * done here. */ if (modem_init) - return 0; + goto done; /* Otherwise we need to load the firmware and have Trust Zone validate * and install it. If that succeeds we can proceed with setup. @@ -794,12 +768,15 @@ static int ipa_probe(struct platform_device *pdev) ret = ipa_setup(ipa); if (ret) goto err_deconfig; +done: + (void)ipa_clock_put(ipa); return 0; err_deconfig: ipa_deconfig(ipa); -err_modem_exit: +err_clock_put: + (void)ipa_clock_put(ipa); ipa_modem_exit(ipa); err_table_exit: ipa_table_exit(ipa); @@ -825,6 +802,10 @@ static int ipa_remove(struct platform_device *pdev) struct ipa_clock *clock = ipa->clock; int ret; + ret = ipa_clock_get(ipa); + if (WARN_ON(ret < 0)) + goto out_clock_put; + if (ipa->setup_complete) { ret = ipa_modem_stop(ipa); /* If starting or stopping is in progress, try once more */ @@ -839,6 +820,9 @@ static int ipa_remove(struct platform_device *pdev) } ipa_deconfig(ipa); +out_clock_put: + (void)ipa_clock_put(ipa); + ipa_modem_exit(ipa); ipa_table_exit(ipa); ipa_endpoint_exit(ipa); @@ -860,62 +844,6 @@ static void ipa_shutdown(struct platform_device *pdev) dev_err(&pdev->dev, "shutdown: remove returned %d\n", ret); } -/** - * ipa_suspend() - Power management system suspend callback - * @dev: IPA device structure - * - * Return: Always returns zero - * - * Called by the PM framework when a system suspend operation is invoked. - * Suspends endpoints and releases the clock reference held to keep - * the IPA clock running until this point. - */ -static int ipa_suspend(struct device *dev) -{ - struct ipa *ipa = dev_get_drvdata(dev); - - /* When a suspended RX endpoint has a packet ready to receive, we - * get an IPA SUSPEND interrupt. We trigger a system resume in - * that case, but only on the first such interrupt since suspend. - */ - __clear_bit(IPA_FLAG_RESUMED, ipa->flags); - - ipa_endpoint_suspend(ipa); - - ipa_clock_put(ipa); - - return 0; -} - -/** - * ipa_resume() - Power management system resume callback - * @dev: IPA device structure - * - * Return: Always returns 0 - * - * Called by the PM framework when a system resume operation is invoked. - * Takes an IPA clock reference to keep the clock running until suspend, - * and resumes endpoints. - */ -static int ipa_resume(struct device *dev) -{ - struct ipa *ipa = dev_get_drvdata(dev); - - /* This clock reference will keep the IPA out of suspend - * until we get a power management suspend request. - */ - ipa_clock_get(ipa); - - ipa_endpoint_resume(ipa); - - return 0; -} - -static const struct dev_pm_ops ipa_pm_ops = { - .suspend = ipa_suspend, - .resume = ipa_resume, -}; - static const struct attribute_group *ipa_attribute_groups[] = { &ipa_attribute_group, &ipa_feature_attribute_group, |