diff options
Diffstat (limited to 'drivers/staging/kpc2000/kpc2000/cell_probe.c')
| -rw-r--r-- | drivers/staging/kpc2000/kpc2000/cell_probe.c | 750 |
1 files changed, 394 insertions, 356 deletions
diff --git a/drivers/staging/kpc2000/kpc2000/cell_probe.c b/drivers/staging/kpc2000/kpc2000/cell_probe.c index e0dba91e7fa8..c124a836db27 100644 --- a/drivers/staging/kpc2000/kpc2000/cell_probe.c +++ b/drivers/staging/kpc2000/kpc2000/cell_probe.c @@ -4,7 +4,6 @@ #include <linux/types.h> #include <linux/export.h> #include <linux/slab.h> -#include <asm/io.h> #include <linux/io.h> #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/mfd/core.h> @@ -25,7 +24,7 @@ * D C2S DMA Present * DDD C2S DMA Channel Number [up to 8 channels] * II IRQ Count [0 to 3 IRQs per core] - 1111111000 + * 1111111000 * IIIIIII IRQ Base Number [up to 128 IRQs per card] * ___ Spare * @@ -40,166 +39,192 @@ #define KP_CORE_ID_SPI 5 struct core_table_entry { - u16 type; - u32 offset; - u32 length; - bool s2c_dma_present; - u8 s2c_dma_channel_num; - bool c2s_dma_present; - u8 c2s_dma_channel_num; - u8 irq_count; - u8 irq_base_num; + u16 type; + u32 offset; + u32 length; + bool s2c_dma_present; + u8 s2c_dma_channel_num; + bool c2s_dma_present; + u8 c2s_dma_channel_num; + u8 irq_count; + u8 irq_base_num; }; static void parse_core_table_entry_v0(struct core_table_entry *cte, const u64 read_val) { - cte->type = ((read_val & 0xFFF0000000000000) >> 52); - cte->offset = ((read_val & 0x00000000FFFF0000) >> 16) * 4096; - cte->length = ((read_val & 0x0000FFFF00000000) >> 32) * 8; - cte->s2c_dma_present = ((read_val & 0x0008000000000000) >> 51); - cte->s2c_dma_channel_num = ((read_val & 0x0007000000000000) >> 48); - cte->c2s_dma_present = ((read_val & 0x0000000000008000) >> 15); - cte->c2s_dma_channel_num = ((read_val & 0x0000000000007000) >> 12); - cte->irq_count = ((read_val & 0x0000000000000C00) >> 10); - cte->irq_base_num = ((read_val & 0x00000000000003F8) >> 3); + cte->type = ((read_val & 0xFFF0000000000000) >> 52); + cte->offset = ((read_val & 0x00000000FFFF0000) >> 16) * 4096; + cte->length = ((read_val & 0x0000FFFF00000000) >> 32) * 8; + cte->s2c_dma_present = ((read_val & 0x0008000000000000) >> 51); + cte->s2c_dma_channel_num = ((read_val & 0x0007000000000000) >> 48); + cte->c2s_dma_present = ((read_val & 0x0000000000008000) >> 15); + cte->c2s_dma_channel_num = ((read_val & 0x0000000000007000) >> 12); + cte->irq_count = ((read_val & 0x0000000000000C00) >> 10); + cte->irq_base_num = ((read_val & 0x00000000000003F8) >> 3); } static void dbg_cte(struct kp2000_device *pcard, struct core_table_entry *cte) { - dev_dbg(&pcard->pdev->dev, "CTE: type:%3d offset:%3d (%3d) length:%3d (%3d) s2c:%d c2s:%d irq_count:%d base_irq:%d\n", - cte->type, - cte->offset, - cte->offset / 4096, - cte->length, - cte->length / 8, - (cte->s2c_dma_present ? cte->s2c_dma_channel_num : -1), - (cte->c2s_dma_present ? cte->c2s_dma_channel_num : -1), - cte->irq_count, - cte->irq_base_num - ); + dev_dbg(&pcard->pdev->dev, "CTE: type:%3d offset:%3d (%3d) length:%3d (%3d) s2c:%d c2s:%d irq_count:%d base_irq:%d\n", + cte->type, + cte->offset, + cte->offset / 4096, + cte->length, + cte->length / 8, + (cte->s2c_dma_present ? cte->s2c_dma_channel_num : -1), + (cte->c2s_dma_present ? cte->c2s_dma_channel_num : -1), + cte->irq_count, + cte->irq_base_num + ); } static void parse_core_table_entry(struct core_table_entry *cte, const u64 read_val, const u8 entry_rev) { switch (entry_rev) { - case 0: parse_core_table_entry_v0(cte, read_val); break; - default: cte->type = 0; break; + case 0: + parse_core_table_entry_v0(cte, read_val); + break; + default: + cte->type = 0; + break; } } - -int probe_core_basic(unsigned int core_num, struct kp2000_device *pcard, char *name, const struct core_table_entry cte) +static int probe_core_basic(unsigned int core_num, struct kp2000_device *pcard, + char *name, const struct core_table_entry cte) { - struct mfd_cell cell = {0}; - struct resource resources[2]; - - struct kpc_core_device_platdata core_pdata = { - .card_id = pcard->card_id, - .build_version = pcard->build_version, - .hardware_revision = pcard->hardware_revision, - .ssid = pcard->ssid, - .ddna = pcard->ddna, - }; - - dev_dbg(&pcard->pdev->dev, "Found Basic core: type = %02d dma = %02x / %02x offset = 0x%x length = 0x%x (%d regs)\n", cte.type, KPC_OLD_S2C_DMA_CH_NUM(cte), KPC_OLD_C2S_DMA_CH_NUM(cte), cte.offset, cte.length, cte.length / 8); - - - cell.platform_data = &core_pdata; - cell.pdata_size = sizeof(struct kpc_core_device_platdata); - cell.name = name; - cell.id = core_num; - cell.num_resources = 2; - - memset(&resources, 0, sizeof(resources)); - - resources[0].start = cte.offset; - resources[0].end = cte.offset + (cte.length - 1); - resources[0].flags = IORESOURCE_MEM; - - resources[1].start = pcard->pdev->irq; - resources[1].end = pcard->pdev->irq; - resources[1].flags = IORESOURCE_IRQ; - - cell.resources = resources; - - return mfd_add_devices( - PCARD_TO_DEV(pcard), // parent - pcard->card_num * 100, // id - &cell, // struct mfd_cell * - 1, // ndevs - &pcard->regs_base_resource, - 0, // irq_base - NULL // struct irq_domain * - ); + struct mfd_cell cell = { .id = core_num, .name = name }; + struct resource resources[2]; + + struct kpc_core_device_platdata core_pdata = { + .card_id = pcard->card_id, + .build_version = pcard->build_version, + .hardware_revision = pcard->hardware_revision, + .ssid = pcard->ssid, + .ddna = pcard->ddna, + }; + + dev_dbg(&pcard->pdev->dev, "Found Basic core: type = %02d dma = %02x / %02x offset = 0x%x length = 0x%x (%d regs)\n", cte.type, KPC_OLD_S2C_DMA_CH_NUM(cte), KPC_OLD_C2S_DMA_CH_NUM(cte), cte.offset, cte.length, cte.length / 8); + + cell.platform_data = &core_pdata; + cell.pdata_size = sizeof(struct kpc_core_device_platdata); + cell.num_resources = 2; + + memset(&resources, 0, sizeof(resources)); + + resources[0].start = cte.offset; + resources[0].end = cte.offset + (cte.length - 1); + resources[0].flags = IORESOURCE_MEM; + + resources[1].start = pcard->pdev->irq; + resources[1].end = pcard->pdev->irq; + resources[1].flags = IORESOURCE_IRQ; + + cell.resources = resources; + + return mfd_add_devices(PCARD_TO_DEV(pcard), // parent + pcard->card_num * 100, // id + &cell, // struct mfd_cell * + 1, // ndevs + &pcard->regs_base_resource, + 0, // irq_base + NULL); // struct irq_domain * } - struct kpc_uio_device { - struct list_head list; - struct kp2000_device *pcard; - struct device *dev; - struct uio_info uioinfo; - struct core_table_entry cte; - u16 core_num; + struct list_head list; + struct kp2000_device *pcard; + struct device *dev; + struct uio_info uioinfo; + struct core_table_entry cte; + u16 core_num; }; -static ssize_t show_attr(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t offset_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", kudev->cte.offset); +} +static DEVICE_ATTR_RO(offset); + +static ssize_t size_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", kudev->cte.length); +} +static DEVICE_ATTR_RO(size); + +static ssize_t type_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", kudev->cte.type); +} +static DEVICE_ATTR_RO(type); + +static ssize_t s2c_dma_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + if (!kudev->cte.s2c_dma_present) + return sprintf(buf, "%s", "not present\n"); + + return sprintf(buf, "%u\n", kudev->cte.s2c_dma_channel_num); +} +static DEVICE_ATTR_RO(s2c_dma); + +static ssize_t c2s_dma_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + if (!kudev->cte.c2s_dma_present) + return sprintf(buf, "%s", "not present\n"); + + return sprintf(buf, "%u\n", kudev->cte.c2s_dma_channel_num); +} +static DEVICE_ATTR_RO(c2s_dma); + +static ssize_t irq_count_show(struct device *dev, struct device_attribute *attr, + char *buf) { - struct kpc_uio_device *kudev = dev_get_drvdata(dev); - - #define ATTR_NAME_CMP(v) (strcmp(v, attr->attr.name) == 0) - if ATTR_NAME_CMP("offset"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.offset); - } else if ATTR_NAME_CMP("size"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.length); - } else if ATTR_NAME_CMP("type"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.type); - } - else if ATTR_NAME_CMP("s2c_dma"){ - if (kudev->cte.s2c_dma_present){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.s2c_dma_channel_num); - } else { - return scnprintf(buf, PAGE_SIZE, "not present\n"); - } - } else if ATTR_NAME_CMP("c2s_dma"){ - if (kudev->cte.c2s_dma_present){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.c2s_dma_channel_num); - } else { - return scnprintf(buf, PAGE_SIZE, "not present\n"); - } - } - else if ATTR_NAME_CMP("irq_count"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.irq_count); - } else if ATTR_NAME_CMP("irq_base_num"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->cte.irq_base_num); - } else if ATTR_NAME_CMP("core_num"){ - return scnprintf(buf, PAGE_SIZE, "%u\n", kudev->core_num); - } else { - return 0; - } - #undef ATTR_NAME_CMP + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", kudev->cte.irq_count); +} +static DEVICE_ATTR_RO(irq_count); + +static ssize_t irq_base_num_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", kudev->cte.irq_base_num); } +static DEVICE_ATTR_RO(irq_base_num); + +static ssize_t core_num_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct kpc_uio_device *kudev = dev_get_drvdata(dev); + return sprintf(buf, "%u\n", kudev->core_num); +} +static DEVICE_ATTR_RO(core_num); -DEVICE_ATTR(offset, 0444, show_attr, NULL); -DEVICE_ATTR(size, 0444, show_attr, NULL); -DEVICE_ATTR(type, 0444, show_attr, NULL); -DEVICE_ATTR(s2c_dma_ch, 0444, show_attr, NULL); -DEVICE_ATTR(c2s_dma_ch, 0444, show_attr, NULL); -DEVICE_ATTR(s2c_dma, 0444, show_attr, NULL); -DEVICE_ATTR(c2s_dma, 0444, show_attr, NULL); -DEVICE_ATTR(irq_count, 0444, show_attr, NULL); -DEVICE_ATTR(irq_base_num, 0444, show_attr, NULL); -DEVICE_ATTR(core_num, 0444, show_attr, NULL); -struct attribute * kpc_uio_class_attrs[] = { +struct attribute *kpc_uio_class_attrs[] = { &dev_attr_offset.attr, &dev_attr_size.attr, &dev_attr_type.attr, - &dev_attr_s2c_dma_ch.attr, - &dev_attr_c2s_dma_ch.attr, &dev_attr_s2c_dma.attr, &dev_attr_c2s_dma.attr, &dev_attr_irq_count.attr, @@ -208,264 +233,277 @@ struct attribute * kpc_uio_class_attrs[] = { NULL, }; - static int kp2000_check_uio_irq(struct kp2000_device *pcard, u32 irq_num) { - u64 interrupt_active = readq(pcard->sysinfo_regs_base + REG_INTERRUPT_ACTIVE); - u64 interrupt_mask_inv = ~readq(pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); - u64 irq_check_mask = (1 << irq_num); - if (interrupt_active & irq_check_mask){ // if it's active (interrupt pending) - if (interrupt_mask_inv & irq_check_mask){ // and if it's not masked off - return 1; - } - } - return 0; + u64 interrupt_active = readq(pcard->sysinfo_regs_base + REG_INTERRUPT_ACTIVE); + u64 interrupt_mask_inv = ~readq(pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); + u64 irq_check_mask = BIT_ULL(irq_num); + + if (interrupt_active & irq_check_mask) { // if it's active (interrupt pending) + if (interrupt_mask_inv & irq_check_mask) { // and if it's not masked off + return 1; + } + } + return 0; } static irqreturn_t kuio_handler(int irq, struct uio_info *uioinfo) { - struct kpc_uio_device *kudev = uioinfo->priv; - if (irq != kudev->pcard->pdev->irq) - return IRQ_NONE; - - if (kp2000_check_uio_irq(kudev->pcard, kudev->cte.irq_base_num)){ - writeq((1 << kudev->cte.irq_base_num), kudev->pcard->sysinfo_regs_base + REG_INTERRUPT_ACTIVE); // Clear the active flag - return IRQ_HANDLED; - } - return IRQ_NONE; + struct kpc_uio_device *kudev = uioinfo->priv; + + if (irq != kudev->pcard->pdev->irq) + return IRQ_NONE; + + if (kp2000_check_uio_irq(kudev->pcard, kudev->cte.irq_base_num)) { + /* Clear the active flag */ + writeq(BIT_ULL(kudev->cte.irq_base_num), + kudev->pcard->sysinfo_regs_base + REG_INTERRUPT_ACTIVE); + return IRQ_HANDLED; + } + return IRQ_NONE; } static int kuio_irqcontrol(struct uio_info *uioinfo, s32 irq_on) { - struct kpc_uio_device *kudev = uioinfo->priv; - struct kp2000_device *pcard = kudev->pcard; - u64 mask; - - lock_card(pcard); - mask = readq(pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); - if (irq_on){ - mask &= ~(1 << (kudev->cte.irq_base_num)); - } else { - mask |= (1 << (kudev->cte.irq_base_num)); - } - writeq(mask, pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); - unlock_card(pcard); - - return 0; + struct kpc_uio_device *kudev = uioinfo->priv; + struct kp2000_device *pcard = kudev->pcard; + u64 mask; + + mutex_lock(&pcard->sem); + mask = readq(pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); + if (irq_on) + mask &= ~(BIT_ULL(kudev->cte.irq_base_num)); + else + mask |= BIT_ULL(kudev->cte.irq_base_num); + writeq(mask, pcard->sysinfo_regs_base + REG_INTERRUPT_MASK); + mutex_unlock(&pcard->sem); + + return 0; } -int probe_core_uio(unsigned int core_num, struct kp2000_device *pcard, char *name, const struct core_table_entry cte) +static int probe_core_uio(unsigned int core_num, struct kp2000_device *pcard, + char *name, const struct core_table_entry cte) { - struct kpc_uio_device *kudev; - int rv; - - dev_dbg(&pcard->pdev->dev, "Found UIO core: type = %02d dma = %02x / %02x offset = 0x%x length = 0x%x (%d regs)\n", cte.type, KPC_OLD_S2C_DMA_CH_NUM(cte), KPC_OLD_C2S_DMA_CH_NUM(cte), cte.offset, cte.length, cte.length / 8); - - kudev = kzalloc(sizeof(struct kpc_uio_device), GFP_KERNEL); - if (!kudev){ - dev_err(&pcard->pdev->dev, "probe_core_uio: failed to kzalloc kpc_uio_device\n"); - return -ENOMEM; - } - - INIT_LIST_HEAD(&kudev->list); - kudev->pcard = pcard; - kudev->cte = cte; - kudev->core_num = core_num; - - kudev->uioinfo.priv = kudev; - kudev->uioinfo.name = name; - kudev->uioinfo.version = "0.0"; - if (cte.irq_count > 0){ - kudev->uioinfo.irq_flags = IRQF_SHARED; - kudev->uioinfo.irq = pcard->pdev->irq; - kudev->uioinfo.handler = kuio_handler; - kudev->uioinfo.irqcontrol = kuio_irqcontrol; - } else { - kudev->uioinfo.irq = 0; - } - - kudev->uioinfo.mem[0].name = "uiomap"; - kudev->uioinfo.mem[0].addr = pci_resource_start(pcard->pdev, REG_BAR) + cte.offset; - kudev->uioinfo.mem[0].size = (cte.length + PAGE_SIZE-1) & ~(PAGE_SIZE-1); // Round up to nearest PAGE_SIZE boundary - kudev->uioinfo.mem[0].memtype = UIO_MEM_PHYS; - - kudev->dev = device_create(kpc_uio_class, &pcard->pdev->dev, MKDEV(0,0), kudev, "%s.%d.%d.%d", kudev->uioinfo.name, pcard->card_num, cte.type, kudev->core_num); - if (IS_ERR(kudev->dev)) { - dev_err(&pcard->pdev->dev, "probe_core_uio device_create failed!\n"); - return -ENODEV; - } - dev_set_drvdata(kudev->dev, kudev); - - rv = uio_register_device(kudev->dev, &kudev->uioinfo); - if (rv){ - dev_err(&pcard->pdev->dev, "probe_core_uio failed uio_register_device: %d\n", rv); - return rv; - } - - list_add_tail(&kudev->list, &pcard->uio_devices_list); - - return 0; -} + struct kpc_uio_device *kudev; + int rv; + + dev_dbg(&pcard->pdev->dev, "Found UIO core: type = %02d dma = %02x / %02x offset = 0x%x length = 0x%x (%d regs)\n", cte.type, KPC_OLD_S2C_DMA_CH_NUM(cte), KPC_OLD_C2S_DMA_CH_NUM(cte), cte.offset, cte.length, cte.length / 8); + + kudev = kzalloc(sizeof(*kudev), GFP_KERNEL); + if (!kudev) + return -ENOMEM; + + INIT_LIST_HEAD(&kudev->list); + kudev->pcard = pcard; + kudev->cte = cte; + kudev->core_num = core_num; + + kudev->uioinfo.priv = kudev; + kudev->uioinfo.name = name; + kudev->uioinfo.version = "0.0"; + if (cte.irq_count > 0) { + kudev->uioinfo.irq_flags = IRQF_SHARED; + kudev->uioinfo.irq = pcard->pdev->irq; + kudev->uioinfo.handler = kuio_handler; + kudev->uioinfo.irqcontrol = kuio_irqcontrol; + } else { + kudev->uioinfo.irq = 0; + } + + kudev->uioinfo.mem[0].name = "uiomap"; + kudev->uioinfo.mem[0].addr = pci_resource_start(pcard->pdev, REG_BAR) + cte.offset; + kudev->uioinfo.mem[0].size = (cte.length + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); // Round up to nearest PAGE_SIZE boundary + kudev->uioinfo.mem[0].memtype = UIO_MEM_PHYS; + + kudev->dev = device_create(kpc_uio_class, &pcard->pdev->dev, MKDEV(0, 0), kudev, "%s.%d.%d.%d", kudev->uioinfo.name, pcard->card_num, cte.type, kudev->core_num); + if (IS_ERR(kudev->dev)) { + dev_err(&pcard->pdev->dev, "%s: device_create failed!\n", + __func__); + kfree(kudev); + return -ENODEV; + } + dev_set_drvdata(kudev->dev, kudev); + + rv = uio_register_device(kudev->dev, &kudev->uioinfo); + if (rv) { + dev_err(&pcard->pdev->dev, "%s: failed uio_register_device: %d\n", + __func__, rv); + put_device(kudev->dev); + kfree(kudev); + return rv; + } + list_add_tail(&kudev->list, &pcard->uio_devices_list); + + return 0; +} static int create_dma_engine_core(struct kp2000_device *pcard, size_t engine_regs_offset, int engine_num, int irq_num) { - struct mfd_cell cell = {0}; - struct resource resources[2]; - - dev_dbg(&pcard->pdev->dev, "create_dma_core(pcard = [%p], engine_regs_offset = %zx, engine_num = %d)\n", pcard, engine_regs_offset, engine_num); - - cell.platform_data = NULL; - cell.pdata_size = 0; - cell.id = engine_num; - cell.name = KP_DRIVER_NAME_DMA_CONTROLLER; - cell.num_resources = 2; - - memset(&resources, 0, sizeof(resources)); - - resources[0].start = engine_regs_offset; - resources[0].end = engine_regs_offset + (KPC_DMA_ENGINE_SIZE - 1); - resources[0].flags = IORESOURCE_MEM; - - resources[1].start = irq_num; - resources[1].end = irq_num; - resources[1].flags = IORESOURCE_IRQ; - - cell.resources = resources; - - return mfd_add_devices( - PCARD_TO_DEV(pcard), // parent - pcard->card_num * 100, // id - &cell, // struct mfd_cell * - 1, // ndevs - &pcard->dma_base_resource, - 0, // irq_base - NULL // struct irq_domain * - ); + struct mfd_cell cell = { .id = engine_num }; + struct resource resources[2]; + + cell.platform_data = NULL; + cell.pdata_size = 0; + cell.name = KP_DRIVER_NAME_DMA_CONTROLLER; + cell.num_resources = 2; + + memset(&resources, 0, sizeof(resources)); + + resources[0].start = engine_regs_offset; + resources[0].end = engine_regs_offset + (KPC_DMA_ENGINE_SIZE - 1); + resources[0].flags = IORESOURCE_MEM; + + resources[1].start = irq_num; + resources[1].end = irq_num; + resources[1].flags = IORESOURCE_IRQ; + + cell.resources = resources; + + return mfd_add_devices(PCARD_TO_DEV(pcard), // parent + pcard->card_num * 100, // id + &cell, // struct mfd_cell * + 1, // ndevs + &pcard->dma_base_resource, + 0, // irq_base + NULL); // struct irq_domain * } static int kp2000_setup_dma_controller(struct kp2000_device *pcard) { - int err; - unsigned int i; - u64 capabilities_reg; - - // S2C Engines - for (i = 0 ; i < 32 ; i++){ - capabilities_reg = readq( pcard->dma_bar_base + KPC_DMA_S2C_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i) ); - if (capabilities_reg & ENGINE_CAP_PRESENT_MASK){ - err = create_dma_engine_core(pcard, (KPC_DMA_S2C_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)), i, pcard->pdev->irq); - if (err) goto err_out; - } - } - // C2S Engines - for (i = 0 ; i < 32 ; i++){ - capabilities_reg = readq( pcard->dma_bar_base + KPC_DMA_C2S_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i) ); - if (capabilities_reg & ENGINE_CAP_PRESENT_MASK){ - err = create_dma_engine_core(pcard, (KPC_DMA_C2S_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)), 32+i, pcard->pdev->irq); - if (err) goto err_out; - } - } - - return 0; - + int err; + unsigned int i; + u64 capabilities_reg; + + // S2C Engines + for (i = 0 ; i < 32 ; i++) { + capabilities_reg = readq(pcard->dma_bar_base + KPC_DMA_S2C_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)); + if (capabilities_reg & ENGINE_CAP_PRESENT_MASK) { + err = create_dma_engine_core(pcard, (KPC_DMA_S2C_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)), i, pcard->pdev->irq); + if (err) + goto err_out; + } + } + // C2S Engines + for (i = 0 ; i < 32 ; i++) { + capabilities_reg = readq(pcard->dma_bar_base + KPC_DMA_C2S_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)); + if (capabilities_reg & ENGINE_CAP_PRESENT_MASK) { + err = create_dma_engine_core(pcard, (KPC_DMA_C2S_BASE_OFFSET + (KPC_DMA_ENGINE_SIZE * i)), 32 + i, pcard->pdev->irq); + if (err) + goto err_out; + } + } + + return 0; + err_out: - dev_err(&pcard->pdev->dev, "kp2000_setup_dma_controller: failed to add a DMA Engine: %d\n", err); - return err; + dev_err(&pcard->pdev->dev, "%s: failed to add a DMA Engine: %d\n", + __func__, err); + return err; } int kp2000_probe_cores(struct kp2000_device *pcard) { - int err = 0; - int i; - int current_type_id; - u64 read_val; - unsigned int highest_core_id = 0; - struct core_table_entry cte; - - dev_dbg(&pcard->pdev->dev, "kp2000_probe_cores(pcard = %p / %d)\n", pcard, pcard->card_num); - - err = kp2000_setup_dma_controller(pcard); - if (err) return err; - - INIT_LIST_HEAD(&pcard->uio_devices_list); - - // First, iterate the core table looking for the highest CORE_ID - for (i = 0 ; i < pcard->core_table_length ; i++){ - read_val = readq(pcard->sysinfo_regs_base + ((pcard->core_table_offset + i) * 8)); - parse_core_table_entry(&cte, read_val, pcard->core_table_rev); - dbg_cte(pcard, &cte); - if (cte.type > highest_core_id){ - highest_core_id = cte.type; - } - if (cte.type == KP_CORE_ID_INVALID){ - dev_info(&pcard->pdev->dev, "Found Invalid core: %016llx\n", read_val); - } - } - // Then, iterate over the possible core types. - for (current_type_id = 1 ; current_type_id <= highest_core_id ; current_type_id++){ - unsigned int core_num = 0; - // Foreach core type, iterate the whole table and instantiate subdevices for each core. - // Yes, this is O(n*m) but the actual runtime is small enough that it's an acceptable tradeoff. - for (i = 0 ; i < pcard->core_table_length ; i++){ - read_val = readq(pcard->sysinfo_regs_base + ((pcard->core_table_offset + i) * 8)); - parse_core_table_entry(&cte, read_val, pcard->core_table_rev); - - if (cte.type == current_type_id){ - switch (cte.type){ - case KP_CORE_ID_I2C: - err = probe_core_basic(core_num, pcard, KP_DRIVER_NAME_I2C, cte); - break; - - case KP_CORE_ID_SPI: - err = probe_core_basic(core_num, pcard, KP_DRIVER_NAME_SPI, cte); - break; - - default: - err = probe_core_uio(core_num, pcard, "kpc_uio", cte); - break; - } - if (err){ - dev_err(&pcard->pdev->dev, "kp2000_probe_cores: failed to add core %d: %d\n", i, err); - return err; - } - core_num++; - } - } - } - - // Finally, instantiate a UIO device for the core_table. - cte.type = 0; // CORE_ID_BOARD_INFO - cte.offset = 0; // board info is always at the beginning - cte.length = 512*8; - cte.s2c_dma_present = false; - cte.s2c_dma_channel_num = 0; - cte.c2s_dma_present = false; - cte.c2s_dma_channel_num = 0; - cte.irq_count = 0; - cte.irq_base_num = 0; - err = probe_core_uio(0, pcard, "kpc_uio", cte); - if (err){ - dev_err(&pcard->pdev->dev, "kp2000_probe_cores: failed to add board_info core: %d\n", err); - return err; - } - - return 0; + int err = 0; + int i; + int current_type_id; + u64 read_val; + unsigned int highest_core_id = 0; + struct core_table_entry cte; + + err = kp2000_setup_dma_controller(pcard); + if (err) + return err; + + INIT_LIST_HEAD(&pcard->uio_devices_list); + + // First, iterate the core table looking for the highest CORE_ID + for (i = 0 ; i < pcard->core_table_length ; i++) { + read_val = readq(pcard->sysinfo_regs_base + ((pcard->core_table_offset + i) * 8)); + parse_core_table_entry(&cte, read_val, pcard->core_table_rev); + dbg_cte(pcard, &cte); + if (cte.type > highest_core_id) + highest_core_id = cte.type; + if (cte.type == KP_CORE_ID_INVALID) + dev_info(&pcard->pdev->dev, "Found Invalid core: %016llx\n", read_val); + } + // Then, iterate over the possible core types. + for (current_type_id = 1 ; current_type_id <= highest_core_id ; current_type_id++) { + unsigned int core_num = 0; + // Foreach core type, iterate the whole table and instantiate subdevices for each core. + // Yes, this is O(n*m) but the actual runtime is small enough that it's an acceptable tradeoff. + for (i = 0 ; i < pcard->core_table_length ; i++) { + read_val = readq(pcard->sysinfo_regs_base + ((pcard->core_table_offset + i) * 8)); + parse_core_table_entry(&cte, read_val, pcard->core_table_rev); + + if (cte.type != current_type_id) + continue; + + switch (cte.type) { + case KP_CORE_ID_I2C: + err = probe_core_basic(core_num, pcard, + KP_DRIVER_NAME_I2C, cte); + break; + + case KP_CORE_ID_SPI: + err = probe_core_basic(core_num, pcard, + KP_DRIVER_NAME_SPI, cte); + break; + + default: + err = probe_core_uio(core_num, pcard, "kpc_uio", cte); + break; + } + if (err) { + dev_err(&pcard->pdev->dev, + "%s: failed to add core %d: %d\n", + __func__, i, err); + goto error; + } + core_num++; + } + } + + // Finally, instantiate a UIO device for the core_table. + cte.type = 0; // CORE_ID_BOARD_INFO + cte.offset = 0; // board info is always at the beginning + cte.length = 512 * 8; + cte.s2c_dma_present = false; + cte.s2c_dma_channel_num = 0; + cte.c2s_dma_present = false; + cte.c2s_dma_channel_num = 0; + cte.irq_count = 0; + cte.irq_base_num = 0; + err = probe_core_uio(0, pcard, "kpc_uio", cte); + if (err) { + dev_err(&pcard->pdev->dev, "%s: failed to add board_info core: %d\n", + __func__, err); + goto error; + } + + return 0; + +error: + kp2000_remove_cores(pcard); + mfd_remove_devices(PCARD_TO_DEV(pcard)); + return err; } void kp2000_remove_cores(struct kp2000_device *pcard) { - struct list_head *ptr; - struct list_head *next; - list_for_each_safe(ptr, next, &pcard->uio_devices_list){ - struct kpc_uio_device *kudev = list_entry(ptr, struct kpc_uio_device, list); - uio_unregister_device(&kudev->uioinfo); - device_unregister(kudev->dev); - list_del(&kudev->list); - kfree(kudev); - } + struct list_head *ptr; + struct list_head *next; + + list_for_each_safe(ptr, next, &pcard->uio_devices_list) { + struct kpc_uio_device *kudev = list_entry(ptr, struct kpc_uio_device, list); + + uio_unregister_device(&kudev->uioinfo); + device_unregister(kudev->dev); + list_del(&kudev->list); + kfree(kudev); + } } |