From 358f9a77a668660729e705fde9c3cf69f013aa98 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 25 Mar 2008 12:22:47 +0900 Subject: libata: implement and use ata_noop_irq_clear() ->irq_clear() is used to clear IRQ bit of a SFF controller and isn't useful for drivers which don't use libata SFF HSM implementation. However, it's a required callback and many drivers implement their own noop version as placeholder. This patch implements ata_noop_irq_clear and use it to replace those custom placeholders. Also, SFF drivers which don't support BMDMA don't need to use ata_bmdma_irq_clear(). It becomes noop if BMDMA address isn't initialized. Convert them to use ata_noop_irq_clear(). Signed-off-by: Tejun Heo --- drivers/ata/pata_at32.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'drivers/ata/pata_at32.c') diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c index db057b183d60..27c959f35c2c 100644 --- a/drivers/ata/pata_at32.c +++ b/drivers/ata/pata_at32.c @@ -166,11 +166,6 @@ static void pata_at32_set_piomode(struct ata_port *ap, struct ata_device *adev) } } -static void pata_at32_irq_clear(struct ata_port *ap) -{ - /* No DMA controller yet */ -} - static struct scsi_host_template at32_sht = { .module = THIS_MODULE, .name = DRV_NAME, @@ -208,7 +203,7 @@ static struct ata_port_operations at32_port_ops = { .data_xfer = ata_data_xfer, - .irq_clear = pata_at32_irq_clear, + .irq_clear = ata_noop_irq_clear, .irq_on = ata_irq_on, .port_start = ata_sff_port_start, -- cgit v1.2.3 From 68d1d07b510bb57a504588adc2bd2758adea0965 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 25 Mar 2008 12:22:49 +0900 Subject: libata: implement and use SHT initializers libata lets low level drivers build scsi_host_template and register it to the SCSI layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This patch implements SHT initializers which can be used to initialize all the boilerplate entries in a sht. Three variants of them are implemented - BASE, BMDMA and NCQ - for different types of drivers. Note that entries can be overriden by putting individual initializers after the helper macro. All sht tables are identical before and after this patch. Signed-off-by: Tejun Heo --- drivers/ata/pata_at32.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) (limited to 'drivers/ata/pata_at32.c') diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c index 27c959f35c2c..d7b7b7fde362 100644 --- a/drivers/ata/pata_at32.c +++ b/drivers/ata/pata_at32.c @@ -167,21 +167,7 @@ static void pata_at32_set_piomode(struct ata_port *ap, struct ata_device *adev) } static struct scsi_host_template at32_sht = { - .module = THIS_MODULE, - .name = DRV_NAME, - .ioctl = ata_scsi_ioctl, - .queuecommand = ata_scsi_queuecmd, - .can_queue = ATA_DEF_QUEUE, - .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = LIBATA_MAX_PRD, - .cmd_per_lun = ATA_SHT_CMD_PER_LUN, - .emulated = ATA_SHT_EMULATED, - .use_clustering = ATA_SHT_USE_CLUSTERING, - .proc_name = DRV_NAME, - .dma_boundary = ATA_DMA_BOUNDARY, - .slave_configure = ata_scsi_slave_config, - .slave_destroy = ata_scsi_slave_destroy, - .bios_param = ata_std_bios_param, + ATA_PIO_SHT(DRV_NAME), }; static struct ata_port_operations at32_port_ops = { -- cgit v1.2.3 From 029cfd6b74fc5c517865fad78cf4a3ea8d9b664a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 25 Mar 2008 12:22:49 +0900 Subject: libata: implement and use ops inheritance libata lets low level drivers build ata_port_operations table and register it with libata core layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This becomes worse for drivers which support related similar controllers which differ slightly. They share most of the operations except for a few. However, the driver still needs to list all operations for each variant. This results in large number of duplicate entries, which is not only inefficient but also error-prone as it becomes very difficult to tell what the actual differences are. This duplicate boilerplates all over the low level drivers also make updating the core layer exteremely difficult and error-prone. When compounded with multi-branched development model, it ends up accumulating inconsistencies over time. Some of those inconsistencies cause immediate problems and fixed. Others just remain there dormant making maintenance increasingly difficult. To rectify the problem, this patch implements ata_port_operations inheritance. To allow LLDs to easily re-use their own ops tables overriding only specific methods, this patch implements poor man's class inheritance. An ops table has ->inherits field which can be set to any ops table as long as it doesn't create a loop. When the host is started, the inheritance chain is followed and any operation which isn't specified is taken from the nearest ancestor which has it specified. This operation is called finalization and done only once per an ops table and the LLD doesn't have to do anything special about it other than making the ops table non-const such that libata can update it. libata provides four base ops tables lower drivers can inherit from - base, sata, pmp, sff and bmdma. To avoid overriding these ops accidentaly, these ops are declared const and LLDs should always inherit these instead of using them directly. After finalization, all the ops table are identical before and after the patch except for setting .irq_handler to ata_interrupt in drivers which didn't use to. The .irq_handler doesn't have any actual effect and the field will soon be removed by later patch. * sata_sx4 is still using old style EH and currently doesn't take advantage of ops inheritance. Signed-off-by: Tejun Heo --- drivers/ata/pata_at32.c | 23 ++--------------------- 1 file changed, 2 insertions(+), 21 deletions(-) (limited to 'drivers/ata/pata_at32.c') diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c index d7b7b7fde362..528315587532 100644 --- a/drivers/ata/pata_at32.c +++ b/drivers/ata/pata_at32.c @@ -171,28 +171,9 @@ static struct scsi_host_template at32_sht = { }; static struct ata_port_operations at32_port_ops = { - .set_piomode = pata_at32_set_piomode, - .tf_load = ata_tf_load, - .tf_read = ata_tf_read, - .exec_command = ata_exec_command, - .check_status = ata_check_status, - .dev_select = ata_std_dev_select, - - .freeze = ata_bmdma_freeze, - .thaw = ata_bmdma_thaw, - .error_handler = ata_bmdma_error_handler, - .post_internal_cmd = ata_bmdma_post_internal_cmd, + .inherits = &ata_sff_port_ops, .cable_detect = ata_cable_40wire, - - .qc_prep = ata_qc_prep, - .qc_issue = ata_qc_issue_prot, - - .data_xfer = ata_data_xfer, - - .irq_clear = ata_noop_irq_clear, - .irq_on = ata_irq_on, - - .port_start = ata_sff_port_start, + .set_piomode = pata_at32_set_piomode, }; static int __init pata_at32_init_one(struct device *dev, -- cgit v1.2.3 From 9363c3825ea9ad76561eb48a395349dd29211ed6 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 7 Apr 2008 22:47:16 +0900 Subject: libata: rename SFF functions SFF functions have confusing names. Some have sff prefix, some have bmdma, some std, some pci and some none. Unify the naming by... * SFF functions which are common to both BMDMA and non-BMDMA are prefixed with ata_sff_. * SFF functions which are specific to BMDMA are prefixed with ata_bmdma_. * SFF functions which are specific to PCI but apply to both BMDMA and non-BMDMA are prefixed with ata_pci_sff_. * SFF functions which are specific to PCI and BMDMA are prefixed with ata_pci_bmdma_. * Drop generic prefixes from LLD specific routines. For example, bfin_std_dev_select -> bfin_dev_select. The following renames are noteworthy. ata_qc_issue_prot() -> ata_sff_qc_issue() ata_pci_default_filter() -> ata_bmdma_mode_filter() ata_dev_try_classify() -> ata_sff_dev_classify() This rename is in preparation of separating SFF support out of libata core layer. This patch strictly renames functions and doesn't introduce any behavior difference. Signed-off-by: Tejun Heo --- drivers/ata/pata_at32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/ata/pata_at32.c') diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c index 528315587532..3e8651d78952 100644 --- a/drivers/ata/pata_at32.c +++ b/drivers/ata/pata_at32.c @@ -223,7 +223,7 @@ static int __init pata_at32_init_one(struct device *dev, host->private_data = info; /* Register ATA device and return */ - return ata_host_activate(host, info->irq, ata_interrupt, + return ata_host_activate(host, info->irq, ata_sff_interrupt, IRQF_SHARED | IRQF_TRIGGER_RISING, &at32_sht); } -- cgit v1.2.3 From 458622fcdc5b316de8d74efd7e610803f0308c14 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 18 Apr 2008 13:41:57 -0700 Subject: ATA/IDE: fix platform driver hotplug/coldplug Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable ATA and IDE platform drivers, to re-enable auto loading. NOTE: both ata/pata_platform.c and ide/legacy/ide_platform.c claim to provide "the" platform_pata driver, and there's no build-time mutual exclusion mechanism. This means that configs which enable both drivers will make some trouble when hotplugging... [dbrownell@users.sourceforge.net: more drivers, registration fixes] Signed-off-by: Kay Sievers Signed-off-by: David Brownell Cc: Tejun Heo Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik --- drivers/ata/pata_at32.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/ata/pata_at32.c') diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c index 3e8651d78952..5e104385d6a3 100644 --- a/drivers/ata/pata_at32.c +++ b/drivers/ata/pata_at32.c @@ -381,6 +381,9 @@ static int __exit pata_at32_remove(struct platform_device *pdev) return 0; } +/* work with hotplug and coldplug */ +MODULE_ALIAS("platform:at32_ide"); + static struct platform_driver pata_at32_driver = { .remove = __exit_p(pata_at32_remove), .driver = { -- cgit v1.2.3