From c95f25b03667c50e7184a63bdf4c32dff0de2f6f Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Tue, 14 Oct 2014 14:23:38 +0800 Subject: ACPI / EC: Add CPU ID to debugging messages. This patch adds CPU ID to the context entries' debugging output. no functional changes. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index cb6066c809ea..9cb4d0c468eb 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -181,7 +181,8 @@ static bool advance_transaction(struct acpi_ec *ec) u8 status; bool wakeup = false; - pr_debug("===== %s =====\n", in_interrupt() ? "IRQ" : "TASK"); + pr_debug("===== %s (%d) =====\n", + in_interrupt() ? "IRQ" : "TASK", smp_processor_id()); status = acpi_ec_read_status(ec); t = ec->curr; if (!t) -- cgit v1.2.3 From 459572a7503bccb5435936488088c8db4f51d3ab Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Tue, 14 Oct 2014 14:23:43 +0800 Subject: ACPI / EC: Enhance the logs to apply to QR_EC transactions. Currently some logs are applied to new transactions, but QR_EC transactions are not included. This patch merges the code path to make the logs also applying to the QR_EC transactions. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 9cb4d0c468eb..b15a431301a0 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -303,12 +303,15 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, spin_lock_irqsave(&ec->lock, tmp); /* following two actions should be kept atomic */ ec->curr = t; + pr_debug("transaction start (cmd=0x%02x, addr=0x%02x)\n", + t->command, t->wdata ? t->wdata[0] : 0); start_transaction(ec); spin_unlock_irqrestore(&ec->lock, tmp); ret = ec_poll(ec); spin_lock_irqsave(&ec->lock, tmp); if (ec->curr->command == ACPI_EC_COMMAND_QUERY) clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); + pr_debug("transaction end\n"); ec->curr = NULL; spin_unlock_irqrestore(&ec->lock, tmp); return ret; @@ -334,8 +337,6 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) goto unlock; } } - pr_debug("transaction start (cmd=0x%02x, addr=0x%02x)\n", - t->command, t->wdata ? t->wdata[0] : 0); /* disable GPE during transaction if storm is detected */ if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { /* It has to be disabled, so that it doesn't trigger. */ @@ -356,7 +357,6 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) t->irq_count); set_bit(EC_FLAGS_GPE_STORM, &ec->flags); } - pr_debug("transaction end\n"); if (ec->global_lock) acpi_release_global_lock(glk); unlock: -- cgit v1.2.3 From e34c0e2bb4046d574224de3752642177a45a067a Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Tue, 14 Oct 2014 14:23:49 +0800 Subject: ACPI / EC: Add detailed command/query debugging information. Developers really don't need to translate EC commands in mind. This patch adds detailed debugging information for the EC commands. The address can be found in the follow-up sequential EC_DATA(W) accesses, thus this patch also removes some of the redundant address information. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec.c | 34 +++++++++++++++++++++++++++++----- 1 file changed, 29 insertions(+), 5 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index b15a431301a0..fcf667c3961e 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -164,6 +164,27 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) outb(data, ec->data_addr); } +#ifdef DEBUG +static const char *acpi_ec_cmd_string(u8 cmd) +{ + switch (cmd) { + case 0x80: + return "RD_EC"; + case 0x81: + return "WR_EC"; + case 0x82: + return "BE_EC"; + case 0x83: + return "BD_EC"; + case 0x84: + return "QR_EC"; + } + return "UNKNOWN"; +} +#else +#define acpi_ec_cmd_string(cmd) "UNDEF" +#endif + static int ec_transaction_completed(struct acpi_ec *ec) { unsigned long flags; @@ -199,7 +220,8 @@ static bool advance_transaction(struct acpi_ec *ec) if (t->rlen == t->ri) { t->flags |= ACPI_EC_COMMAND_COMPLETE; if (t->command == ACPI_EC_COMMAND_QUERY) - pr_debug("hardware QR_EC completion\n"); + pr_debug("***** Command(%s) hardware completion *****\n", + acpi_ec_cmd_string(t->command)); wakeup = true; } } else @@ -222,7 +244,8 @@ static bool advance_transaction(struct acpi_ec *ec) t->flags |= ACPI_EC_COMMAND_POLL; t->rdata[t->ri++] = 0x00; t->flags |= ACPI_EC_COMMAND_COMPLETE; - pr_debug("software QR_EC completion\n"); + pr_debug("***** Command(%s) software completion *****\n", + acpi_ec_cmd_string(t->command)); wakeup = true; } else if ((status & ACPI_EC_FLAG_IBF) == 0) { acpi_ec_write_cmd(ec, t->command); @@ -303,15 +326,16 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, spin_lock_irqsave(&ec->lock, tmp); /* following two actions should be kept atomic */ ec->curr = t; - pr_debug("transaction start (cmd=0x%02x, addr=0x%02x)\n", - t->command, t->wdata ? t->wdata[0] : 0); + pr_debug("***** Command(%s) started *****\n", + acpi_ec_cmd_string(t->command)); start_transaction(ec); spin_unlock_irqrestore(&ec->lock, tmp); ret = ec_poll(ec); spin_lock_irqsave(&ec->lock, tmp); if (ec->curr->command == ACPI_EC_COMMAND_QUERY) clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); - pr_debug("transaction end\n"); + pr_debug("***** Command(%s) stopped *****\n", + acpi_ec_cmd_string(t->command)); ec->curr = NULL; spin_unlock_irqrestore(&ec->lock, tmp); return ret; -- cgit v1.2.3 From d3090b6a6cfa6c7a762d6c13340170ca072b2b81 Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Tue, 14 Oct 2014 14:23:55 +0800 Subject: ACPI / EC: Refine event/query debugging messages. This patch refines event/query debugging messages to use a unified format as commands. Developers can clearly find different processes by checking different log seperators. No functional changes. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index fcf667c3961e..d0247d38d96f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -332,8 +332,10 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, spin_unlock_irqrestore(&ec->lock, tmp); ret = ec_poll(ec); spin_lock_irqsave(&ec->lock, tmp); - if (ec->curr->command == ACPI_EC_COMMAND_QUERY) + if (ec->curr->command == ACPI_EC_COMMAND_QUERY) { clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); + pr_debug("***** Event stopped *****\n"); + } pr_debug("***** Command(%s) stopped *****\n", acpi_ec_cmd_string(t->command)); ec->curr = NULL; @@ -617,12 +619,12 @@ static void acpi_ec_run(void *cxt) struct acpi_ec_query_handler *handler = cxt; if (!handler) return; - pr_debug("start query execution\n"); + pr_debug("##### Query(0x%02x) started #####\n", handler->query_bit); if (handler->func) handler->func(handler->data); else if (handler->handle) acpi_evaluate_object(handler->handle, NULL, NULL, NULL); - pr_debug("stop query execution\n"); + pr_debug("##### Query(0x%02x) stopped #####\n", handler->query_bit); kfree(handler); } @@ -645,8 +647,8 @@ static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data) if (!copy) return -ENOMEM; memcpy(copy, handler, sizeof(*copy)); - pr_debug("push query execution (0x%2x) on queue\n", - value); + pr_debug("##### Query(0x%02x) scheduled #####\n", + handler->query_bit); return acpi_os_execute((copy->func) ? OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER, acpi_ec_run, copy); @@ -669,7 +671,7 @@ static int ec_check_sci(struct acpi_ec *ec, u8 state) { if (state & ACPI_EC_FLAG_SCI) { if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) { - pr_debug("push gpe query to the queue\n"); + pr_debug("***** Event started *****\n"); return acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ec_gpe_query, ec); } -- cgit v1.2.3 From 7a73e60e398a61612651d503aef9c81260d33918 Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Tue, 14 Oct 2014 14:24:01 +0800 Subject: ACPI / EC: Cleanup coding style. This patch cleans up the following coding style issues that are detected by scripts/checkpatch.pl: ERROR: code indent should use tabs where possible ERROR: "foo * bar" should be "foo *bar" WARNING: Missing a blank line after declarations WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable WARNING: void function return statements are not generally useful WARNING: else is not generally useful after a break or return WARNING: break is not useful after a goto or return WARNING: braces {} are not necessary for single statement blocks WARNING: line over 80 characters WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt No functional changes. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec.c | 56 +++++++++++++++++++++++++++++-------------------------- 1 file changed, 30 insertions(+), 26 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index d0247d38d96f..3d304ff7f095 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -128,12 +128,13 @@ static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */ /* -------------------------------------------------------------------------- - Transaction Management - -------------------------------------------------------------------------- */ + * Transaction Management + * -------------------------------------------------------------------------- */ static inline u8 acpi_ec_read_status(struct acpi_ec *ec) { u8 x = inb(ec->command_addr); + pr_debug("EC_SC(R) = 0x%2.2x " "SCI_EVT=%d BURST=%d CMD=%d IBF=%d OBF=%d\n", x, @@ -148,6 +149,7 @@ static inline u8 acpi_ec_read_status(struct acpi_ec *ec) static inline u8 acpi_ec_read_data(struct acpi_ec *ec) { u8 x = inb(ec->data_addr); + pr_debug("EC_DATA(R) = 0x%2.2x\n", x); return x; } @@ -189,6 +191,7 @@ static int ec_transaction_completed(struct acpi_ec *ec) { unsigned long flags; int ret = 0; + spin_lock_irqsave(&ec->lock, flags); if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_COMPLETE)) ret = 1; @@ -288,6 +291,7 @@ static int ec_poll(struct acpi_ec *ec) { unsigned long flags; int repeat = 5; /* number of command restarts */ + while (repeat--) { unsigned long delay = jiffies + msecs_to_jiffies(ec_delay); @@ -320,6 +324,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, { unsigned long tmp; int ret = 0; + if (EC_FLAGS_MSI) udelay(ACPI_EC_MSI_UDELAY); /* start transaction */ @@ -347,6 +352,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) { int status; u32 glk; + if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata)) return -EINVAL; if (t->rdata) @@ -410,7 +416,7 @@ static int acpi_ec_burst_disable(struct acpi_ec *ec) acpi_ec_transaction(ec, &t) : 0; } -static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) +static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data) { int result; u8 d; @@ -446,10 +452,9 @@ int ec_read(u8 addr, u8 *val) if (!err) { *val = temp_data; return 0; - } else - return err; + } + return err; } - EXPORT_SYMBOL(ec_read); int ec_write(u8 addr, u8 val) @@ -463,22 +468,21 @@ int ec_write(u8 addr, u8 val) return err; } - EXPORT_SYMBOL(ec_write); int ec_transaction(u8 command, - const u8 * wdata, unsigned wdata_len, - u8 * rdata, unsigned rdata_len) + const u8 *wdata, unsigned wdata_len, + u8 *rdata, unsigned rdata_len) { struct transaction t = {.command = command, .wdata = wdata, .rdata = rdata, .wlen = wdata_len, .rlen = rdata_len}; + if (!first_ec) return -ENODEV; return acpi_ec_transaction(first_ec, &t); } - EXPORT_SYMBOL(ec_transaction); /* Get the handle to the EC device */ @@ -488,7 +492,6 @@ acpi_handle ec_get_handle(void) return NULL; return first_ec->handle; } - EXPORT_SYMBOL(ec_get_handle); /* @@ -552,13 +555,14 @@ void acpi_ec_unblock_transactions_early(void) clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags); } -static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data) +static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 *data) { int result; u8 d; struct transaction t = {.command = ACPI_EC_COMMAND_QUERY, .wdata = NULL, .rdata = &d, .wlen = 0, .rlen = 1}; + if (!ec || !data) return -EINVAL; /* @@ -584,6 +588,7 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, { struct acpi_ec_query_handler *handler = kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL); + if (!handler) return -ENOMEM; @@ -596,12 +601,12 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, mutex_unlock(&ec->mutex); return 0; } - EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) { struct acpi_ec_query_handler *handler, *tmp; + mutex_lock(&ec->mutex); list_for_each_entry_safe(handler, tmp, &ec->list, node) { if (query_bit == handler->query_bit) { @@ -611,12 +616,12 @@ void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) } mutex_unlock(&ec->mutex); } - EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); static void acpi_ec_run(void *cxt) { struct acpi_ec_query_handler *handler = cxt; + if (!handler) return; pr_debug("##### Query(0x%02x) started #####\n", handler->query_bit); @@ -660,6 +665,7 @@ static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data) static void acpi_ec_gpe_query(void *ec_cxt) { struct acpi_ec *ec = ec_cxt; + if (!ec) return; mutex_lock(&ec->mutex); @@ -694,8 +700,8 @@ static u32 acpi_ec_gpe_handler(acpi_handle gpe_device, } /* -------------------------------------------------------------------------- - Address Space Management - -------------------------------------------------------------------------- */ + * Address Space Management + * -------------------------------------------------------------------------- */ static acpi_status acpi_ec_space_handler(u32 function, acpi_physical_address address, @@ -726,27 +732,26 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address, switch (result) { case -EINVAL: return AE_BAD_PARAMETER; - break; case -ENODEV: return AE_NOT_FOUND; - break; case -ETIME: return AE_TIME; - break; default: return AE_OK; } } /* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ + * Driver Interface + * -------------------------------------------------------------------------- */ + static acpi_status ec_parse_io_ports(struct acpi_resource *resource, void *context); static struct acpi_ec *make_acpi_ec(void) { struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); + if (!ec) return NULL; ec->flags = 1 << EC_FLAGS_QUERY_PENDING; @@ -769,9 +774,8 @@ acpi_ec_register_query_methods(acpi_handle handle, u32 level, status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); - if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { + if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); - } return AE_OK; } @@ -780,7 +784,6 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) { acpi_status status; unsigned long long tmp = 0; - struct acpi_ec *ec = context; /* clear addr values, ec_parse_io_ports depend on it */ @@ -808,6 +811,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) static int ec_install_handlers(struct acpi_ec *ec) { acpi_status status; + if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) return 0; status = acpi_install_gpe_handler(NULL, ec->gpe, @@ -1105,7 +1109,8 @@ int __init acpi_ec_ecdt_probe(void) boot_ec->data_addr = ecdt_ptr->data.address; boot_ec->gpe = ecdt_ptr->gpe; boot_ec->handle = ACPI_ROOT_OBJECT; - acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); + acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, + &boot_ec->handle); /* Don't trust ECDT, which comes from ASUSTek */ if (!EC_FLAGS_VALIDATE_ECDT) goto install; @@ -1189,6 +1194,5 @@ static void __exit acpi_ec_exit(void) { acpi_bus_unregister_driver(&acpi_ec_driver); - return; } #endif /* 0 */ -- cgit v1.2.3