diff options
| -rw-r--r-- | drivers/misc/mic/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/misc/mic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/misc/mic/card/Makefile | 10 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_debugfs.c | 130 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_device.c | 299 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_device.h | 133 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_x100.c | 256 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_x100.h | 48 |
8 files changed, 895 insertions, 0 deletions
diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig index aaefd0cf82a7..279a2e649059 100644 --- a/drivers/misc/mic/Kconfig +++ b/drivers/misc/mic/Kconfig @@ -17,3 +17,21 @@ config INTEL_MIC_HOST More information about the Intel MIC family as well as the Linux OS and tools for MIC to use with this driver are available from <http://software.intel.com/en-us/mic-developer>. + +comment "Intel MIC Card Driver" + +config INTEL_MIC_CARD + tristate "Intel MIC Card Driver" + depends on 64BIT + default N + help + This enables card driver support for the Intel Many Integrated + Core (MIC) device family. The card driver communicates shutdown/ + crash events to the host and allows registration/configuration of + virtio devices. Intel MIC X100 devices are currently supported. + + If you are building a card kernel for an Intel MIC device then + say M (recommended) or Y, else say N. If unsure say N. + + For more information see + <http://software.intel.com/en-us/mic-developer>. diff --git a/drivers/misc/mic/Makefile b/drivers/misc/mic/Makefile index 8e724212d94c..05b34d683a58 100644 --- a/drivers/misc/mic/Makefile +++ b/drivers/misc/mic/Makefile @@ -3,3 +3,4 @@ # Copyright(c) 2013, Intel Corporation. # obj-$(CONFIG_INTEL_MIC_HOST) += host/ +obj-$(CONFIG_INTEL_MIC_CARD) += card/ diff --git a/drivers/misc/mic/card/Makefile b/drivers/misc/mic/card/Makefile new file mode 100644 index 000000000000..6e9675e12a09 --- /dev/null +++ b/drivers/misc/mic/card/Makefile @@ -0,0 +1,10 @@ +# +# Makefile - Intel MIC Linux driver. +# Copyright(c) 2013, Intel Corporation. +# +ccflags-y += -DINTEL_MIC_CARD + +obj-$(CONFIG_INTEL_MIC_CARD) += mic_card.o +mic_card-y += mic_x100.o +mic_card-y += mic_device.o +mic_card-y += mic_debugfs.o diff --git a/drivers/misc/mic/card/mic_debugfs.c b/drivers/misc/mic/card/mic_debugfs.c new file mode 100644 index 000000000000..95cf186ff73a --- /dev/null +++ b/drivers/misc/mic/card/mic_debugfs.c @@ -0,0 +1,130 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Disclaimer: The codes contained in these modules may be specific to + * the Intel Software Development Platform codenamed: Knights Ferry, and + * the Intel product codenamed: Knights Corner, and are not backward + * compatible with other Intel products. Additionally, Intel will NOT + * support the codes or instruction set in future products. + * + * Intel MIC Card driver. + * + */ +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/seq_file.h> +#include <linux/interrupt.h> +#include <linux/device.h> + +#include "../common/mic_device.h" +#include "mic_device.h" + +/* Debugfs parent dir */ +static struct dentry *mic_dbg; + +/** + * mic_intr_test - Send interrupts to host. + */ +static int mic_intr_test(struct seq_file *s, void *unused) +{ + struct mic_driver *mdrv = s->private; + struct mic_device *mdev = &mdrv->mdev; + + mic_send_intr(mdev, 0); + msleep(1000); + mic_send_intr(mdev, 1); + msleep(1000); + mic_send_intr(mdev, 2); + msleep(1000); + mic_send_intr(mdev, 3); + msleep(1000); + + return 0; +} + +static int mic_intr_test_open(struct inode *inode, struct file *file) +{ + return single_open(file, mic_intr_test, inode->i_private); +} + +static int mic_intr_test_release(struct inode *inode, struct file *file) +{ + return single_release(inode, file); +} + +static const struct file_operations intr_test_ops = { + .owner = THIS_MODULE, + .open = mic_intr_test_open, + .read = seq_read, + .llseek = seq_lseek, + .release = mic_intr_test_release +}; + +/** + * mic_create_card_debug_dir - Initialize MIC debugfs entries. + */ +void __init mic_create_card_debug_dir(struct mic_driver *mdrv) +{ + struct dentry *d; + + if (!mic_dbg) + return; + + mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg); + if (!mdrv->dbg_dir) { + dev_err(mdrv->dev, "Cant create dbg_dir %s\n", mdrv->name); + return; + } + + d = debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, + mdrv, &intr_test_ops); + + if (!d) { + dev_err(mdrv->dev, + "Cant create dbg intr_test %s\n", mdrv->name); + return; + } +} + +/** + * mic_delete_card_debug_dir - Uninitialize MIC debugfs entries. + */ +void mic_delete_card_debug_dir(struct mic_driver *mdrv) +{ + if (!mdrv->dbg_dir) + return; + + debugfs_remove_recursive(mdrv->dbg_dir); +} + +/** + * mic_init_card_debugfs - Initialize global debugfs entry. + */ +void __init mic_init_card_debugfs(void) +{ + mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); + if (!mic_dbg) + pr_err("can't create debugfs dir\n"); +} + +/** + * mic_exit_card_debugfs - Uninitialize global debugfs entry + */ +void mic_exit_card_debugfs(void) +{ + debugfs_remove(mic_dbg); +} diff --git a/drivers/misc/mic/card/mic_device.c b/drivers/misc/mic/card/mic_device.c new file mode 100644 index 000000000000..3c5c302dba41 --- /dev/null +++ b/drivers/misc/mic/card/mic_device.c @@ -0,0 +1,299 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Disclaimer: The codes contained in these modules may be specific to + * the Intel Software Development Platform codenamed: Knights Ferry, and + * the Intel product codenamed: Knights Corner, and are not backward + * compatible with other Intel products. Additionally, Intel will NOT + * support the codes or instruction set in future products. + * + * Intel MIC Card driver. + * + */ +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/reboot.h> + +#include <linux/mic_common.h> +#include "../common/mic_device.h" +#include "mic_device.h" + +static struct mic_driver *g_drv; +static struct mic_irq *shutdown_cookie; + +static void mic_notify_host(u8 state) +{ + struct mic_driver *mdrv = g_drv; + struct mic_bootparam __iomem *bootparam = mdrv->dp; + + iowrite8(state, &bootparam->shutdown_status); + dev_dbg(mdrv->dev, "%s %d system_state %d\n", + __func__, __LINE__, state); + mic_send_intr(&mdrv->mdev, ioread8(&bootparam->c2h_shutdown_db)); +} + +static int mic_panic_event(struct notifier_block *this, unsigned long event, + void *ptr) +{ + struct mic_driver *mdrv = g_drv; + struct mic_bootparam __iomem *bootparam = mdrv->dp; + + iowrite8(-1, &bootparam->h2c_config_db); + iowrite8(-1, &bootparam->h2c_shutdown_db); + mic_notify_host(MIC_CRASHED); + return NOTIFY_DONE; +} + +static struct notifier_block mic_panic = { + .notifier_call = mic_panic_event, +}; + +static irqreturn_t mic_shutdown_isr(int irq, void *data) +{ + struct mic_driver *mdrv = g_drv; + struct mic_bootparam __iomem *bootparam = mdrv->dp; + + mic_ack_interrupt(&g_drv->mdev); + if (ioread8(&bootparam->shutdown_card)) + orderly_poweroff(true); + return IRQ_HANDLED; +} + +static int mic_shutdown_init(void) +{ + int rc = 0; + struct mic_driver *mdrv = g_drv; + struct mic_bootparam __iomem *bootparam = mdrv->dp; + int shutdown_db; + + shutdown_db = mic_next_card_db(); + shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, + "Shutdown", mdrv, shutdown_db); + if (IS_ERR(shutdown_cookie)) + rc = PTR_ERR(shutdown_cookie); + else + iowrite8(shutdown_db, &bootparam->h2c_shutdown_db); + return rc; +} + +static void mic_shutdown_uninit(void) +{ + struct mic_driver *mdrv = g_drv; + struct mic_bootparam __iomem *bootparam = mdrv->dp; + + iowrite8(-1, &bootparam->h2c_shutdown_db); + mic_free_card_irq(shutdown_cookie, mdrv); +} + +static int __init mic_dp_init(void) +{ + struct mic_driver *mdrv = g_drv; + struct mic_device *mdev = &mdrv->mdev; + struct mic_bootparam __iomem *bootparam; + u64 lo, hi, dp_dma_addr; + u32 magic; + + lo = mic_read_spad(&mdrv->mdev, MIC_DPLO_SPAD); + hi = mic_read_spad(&mdrv->mdev, MIC_DPHI_SPAD); + + dp_dma_addr = lo | (hi << 32); + mdrv->dp = mic_card_map(mdev, dp_dma_addr, MIC_DP_SIZE); + if (!mdrv->dp) { + dev_err(mdrv->dev, "Cannot remap Aperture BAR\n"); + return -ENOMEM; + } + bootparam = mdrv->dp; + magic = ioread32(&bootparam->magic); + if (MIC_MAGIC != magic) { + dev_err(mdrv->dev, "bootparam magic mismatch 0x%x\n", magic); + return -EIO; + } + return 0; +} + +/* Uninitialize the device page */ +static void mic_dp_uninit(void) +{ + mic_card_unmap(&g_drv->mdev, g_drv->dp); +} + +/** + * mic_request_card_irq - request an irq. + * + * @func: The callback function that handles the interrupt. + * @name: The ASCII name of the callee requesting the irq. + * @data: private data that is returned back when calling the + * function handler. + * @index: The doorbell index of the requester. + * + * returns: The cookie that is transparent to the caller. Passed + * back when calling mic_free_irq. An appropriate error code + * is returned on failure. Caller needs to use IS_ERR(return_val) + * to check for failure and PTR_ERR(return_val) to obtained the + * error code. + * + */ +struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data), + const char *name, void *data, int index) +{ + int rc = 0; + unsigned long cookie; + struct mic_driver *mdrv = g_drv; + + rc = request_irq(mic_db_to_irq(mdrv, index), func, + 0, name, data); + if (rc) { + dev_err(mdrv->dev, "request_irq failed rc = %d\n", rc); + goto err; + } + mdrv->irq_info.irq_usage_count[index]++; + cookie = index; + return (struct mic_irq *)cookie; +err: + return ERR_PTR(rc); + +} + +/** + * mic_free_card_irq - free irq. + * + * @cookie: cookie obtained during a successful call to mic_request_irq + * @data: private data specified by the calling function during the + * mic_request_irq + * + * returns: none. + */ +void mic_free_card_irq(struct mic_irq *cookie, void *data) +{ + int index; + struct mic_driver *mdrv = g_drv; + + index = (unsigned long)cookie & 0xFFFFU; + free_irq(mic_db_to_irq(mdrv, index), data); + mdrv->irq_info.irq_usage_count[index]--; +} + +/** + * mic_next_card_db - Get the doorbell with minimum usage count. + * + * Returns the irq index. + */ +int mic_next_card_db(void) +{ + int i; + int index = 0; + struct mic_driver *mdrv = g_drv; + + for (i = 0; i < mdrv->intr_info.num_intr; i++) { + if (mdrv->irq_info.irq_usage_count[i] < + mdrv->irq_info.irq_usage_count[index]) + index = i; + } + + return index; +} + +/** + * mic_init_irq - Initialize irq information. + * + * Returns 0 in success. Appropriate error code on failure. + */ +static int mic_init_irq(void) +{ + struct mic_driver *mdrv = g_drv; + + mdrv->irq_info.irq_usage_count = kzalloc((sizeof(u32) * + mdrv->intr_info.num_intr), + GFP_KERNEL); + if (!mdrv->irq_info.irq_usage_count) + return -ENOMEM; + return 0; +} + +/** + * mic_uninit_irq - Uninitialize irq information. + * + * None. + */ +static void mic_uninit_irq(void) +{ + struct mic_driver *mdrv = g_drv; + + kfree(mdrv->irq_info.irq_usage_count); +} + +/* + * mic_driver_init - MIC driver initialization tasks. + * + * Returns 0 in success. Appropriate error code on failure. + */ +int __init mic_driver_init(struct mic_driver *mdrv) +{ + int rc; + + g_drv = mdrv; + /* + * Unloading the card module is not supported. The MIC card module + * handles fundamental operations like host/card initiated shutdowns + * and informing the host about card crashes and cannot be unloaded. + */ + if (!try_module_get(mdrv->dev->driver->owner)) { + rc = -ENODEV; + goto done; + } + rc = mic_dp_init(); + if (rc) + goto put; + rc = mic_init_irq(); + if (rc) + goto dp_uninit; + rc = mic_shutdown_init(); + if (rc) + goto irq_uninit; + mic_create_card_debug_dir(mdrv); + atomic_notifier_chain_register(&panic_notifier_list, &mic_panic); +done: + return rc; +irq_uninit: + mic_uninit_irq(); +dp_uninit: + mic_dp_uninit(); +put: + module_put(mdrv->dev->driver->owner); + return rc; +} + +/* + * mic_driver_uninit - MIC driver uninitialization tasks. + * + * Returns None + */ +void mic_driver_uninit(struct mic_driver *mdrv) +{ + mic_delete_card_debug_dir(mdrv); + /* + * Inform the host about the shutdown status i.e. poweroff/restart etc. + * The module cannot be unloaded so the only code path to call + * mic_devices_uninit(..) is the shutdown callback. + */ + mic_notify_host(system_state); + mic_shutdown_uninit(); + mic_uninit_irq(); + mic_dp_uninit(); + module_put(mdrv->dev->driver->owner); +} diff --git a/drivers/misc/mic/card/mic_device.h b/drivers/misc/mic/card/mic_device.h new file mode 100644 index 000000000000..347b9b3b7916 --- /dev/null +++ b/drivers/misc/mic/card/mic_device.h @@ -0,0 +1,133 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Disclaimer: The codes contained in these modules may be specific to + * the Intel Software Development Platform codenamed: Knights Ferry, and + * the Intel product codenamed: Knights Corner, and are not backward + * compatible with other Intel products. Additionally, Intel will NOT + * support the codes or instruction set in future products. + * + * Intel MIC Card driver. + * + */ +#ifndef _MIC_CARD_DEVICE_H_ +#define _MIC_CARD_DEVICE_H_ + +#include <linux/workqueue.h> +#include <linux/io.h> + +/** + * struct mic_intr_info - Contains h/w specific interrupt sources info + * + * @num_intr: The number of irqs available + */ +struct mic_intr_info { + u32 num_intr; +}; + +/** + * struct mic_irq_info - OS specific irq information + * + * @irq_usage_count: usage count array tracking the number of sources + * assigned for each irq. + */ +struct mic_irq_info { + int *irq_usage_count; +}; + +/** + * struct mic_device - MIC device information. + * + * @mmio: MMIO bar information. + */ +struct mic_device { + struct mic_mw mmio; +}; + +/** + * struct mic_driver - MIC card driver information. + * + * @name: Name for MIC driver. + * @dbg_dir: debugfs directory of this MIC device. + * @dev: The device backing this MIC. + * @dp: The pointer to the virtio device page. + * @mdev: MIC device information for the host. + * @hotplug_work: Hot plug work for adding/removing virtio devices. + * @irq_info: The OS specific irq information + * @intr_info: H/W specific interrupt information. + */ +struct mic_driver { + char name[20]; + struct dentry *dbg_dir; + struct device *dev; + void __iomem *dp; + struct mic_device mdev; + struct work_struct hotplug_work; + struct mic_irq_info irq_info; + struct mic_intr_info intr_info; +}; + +/** + * struct mic_irq - opaque pointer used as cookie + */ +struct mic_irq; + +/** + * mic_mmio_read - read from an MMIO register. + * @mw: MMIO register base virtual address. + * @offset: register offset. + * + * RETURNS: register value. + */ +static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset) +{ + return ioread32(mw->va + offset); +} + +/** + * mic_mmio_write - write to an MMIO register. + * @mw: MMIO register base virtual address. + * @val: the data value to put into the register + * @offset: register offset. + * + * RETURNS: none. + */ +static inline void +mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset) +{ + iowrite32(val, mw->va + offset); +} + +int mic_driver_init(struct mic_driver *mdrv); +void mic_driver_uninit(struct mic_driver *mdrv); +int mic_next_card_db(void); +struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data), + const char *name, void *data, int intr_src); +void mic_free_card_irq(struct mic_irq *cookie, void *data); +u32 mic_read_spad(struct mic_device *mdev, unsigned int idx); +void mic_send_intr(struct mic_device *mdev, int doorbell); +int mic_db_to_irq(struct mic_driver *mdrv, int db); +u32 mic_ack_interrupt(struct mic_device *mdev); +void mic_hw_intr_init(struct mic_driver *mdrv); +void __iomem * +mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size); +void mic_card_unmap(struct mic_device *mdev, void __iomem *addr); +void __init mic_create_card_debug_dir(struct mic_driver *mdrv); +void mic_delete_card_debug_dir(struct mic_driver *mdrv); +void __init mic_init_card_debugfs(void); +void mic_exit_card_debugfs(void); +#endif diff --git a/drivers/misc/mic/card/mic_x100.c b/drivers/misc/mic/card/mic_x100.c new file mode 100644 index 000000000000..7cb3469cf684 --- /dev/null +++ b/drivers/misc/mic/card/mic_x100.c @@ -0,0 +1,256 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Disclaimer: The codes contained in these modules may be specific to + * the Intel Software Development Platform codenamed: Knights Ferry, and + * the Intel product codenamed: Knights Corner, and are not backward + * compatible with other Intel products. Additionally, Intel will NOT + * support the codes or instruction set in future products. + * + * Intel MIC Card driver. + * + */ +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/platform_device.h> + +#include "../common/mic_device.h" +#include "mic_device.h" +#include "mic_x100.h" + +static const char mic_driver_name[] = "mic"; + +static struct mic_driver g_drv; + +/** + * mic_read_spad - read from the scratchpad register + * @mdev: pointer to mic_device instance + * @idx: index to scratchpad register, 0 based + * + * This function allows reading of the 32bit scratchpad register. + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +u32 mic_read_spad(struct mic_device *mdev, unsigned int idx) +{ + return mic_mmio_read(&mdev->mmio, + MIC_X100_SBOX_BASE_ADDRESS + + MIC_X100_SBOX_SPAD0 + idx * 4); +} + +/** + * __mic_send_intr - Send interrupt to Host. + * @mdev: pointer to mic_device instance + * @doorbell: Doorbell number. + */ +void mic_send_intr(struct mic_device *mdev, int doorbell) +{ + struct mic_mw *mw = &mdev->mmio; + + if (doorbell > MIC_X100_MAX_DOORBELL_IDX) + return; + /* Ensure that the interrupt is ordered w.r.t previous stores. */ + wmb(); + mic_mmio_write(mw, MIC_X100_SBOX_SDBIC0_DBREQ_BIT, + MIC_X100_SBOX_BASE_ADDRESS + + (MIC_X100_SBOX_SDBIC0 + (4 * doorbell))); +} + +/** + * mic_ack_interrupt - Device specific interrupt handling. + * @mdev: pointer to mic_device instance + * + * Returns: bitmask of doorbell events triggered. + */ +u32 mic_ack_interrupt(struct mic_device *mdev) +{ + return 0; +} + +static inline int mic_get_sbox_irq(int db) +{ + return MIC_X100_IRQ_BASE + db; +} + +static inline int mic_get_rdmasr_irq(int index) +{ + return MIC_X100_RDMASR_IRQ_BASE + index; +} + +/** + * mic_hw_intr_init - Initialize h/w specific interrupt + * information. + * @mdrv: pointer to mic_driver + */ +void mic_hw_intr_init(struct mic_driver *mdrv) +{ + mdrv->intr_info.num_intr = MIC_X100_NUM_SBOX_IRQ + + MIC_X100_NUM_RDMASR_IRQ; +} + +/** + * mic_db_to_irq - Retrieve irq number corresponding to a doorbell. + * @mdrv: pointer to mic_driver + * @db: The doorbell obtained for which the irq is needed. Doorbell + * may correspond to an sbox doorbell or an rdmasr index. + * + * Returns the irq corresponding to the doorbell. + */ +int mic_db_to_irq(struct mic_driver *mdrv, int db) +{ + int rdmasr_index; + if (db < MIC_X100_NUM_SBOX_IRQ) { + return mic_get_sbox_irq(db); + } else { + rdmasr_index = db - MIC_X100_NUM_SBOX_IRQ + + MIC_X100_RDMASR_IRQ_BASE; + return mic_get_rdmasr_irq(rdmasr_index); + } +} + +/* + * mic_card_map - Allocate virtual address for a remote memory region. + * @mdev: pointer to mic_device instance. + * @addr: Remote DMA address. + * @size: Size of the region. + * + * Returns: Virtual address backing the remote memory region. + */ +void __iomem * +mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size) +{ + return ioremap(addr, size); +} + +/* + * mic_card_unmap - Unmap the virtual address for a remote memory region. + * @mdev: pointer to mic_device instance. + * @addr: Virtual address for remote memory region. + * + * Returns: None. + */ +void mic_card_unmap(struct mic_device *mdev, void __iomem *addr) +{ + iounmap(addr); +} + +static int __init mic_probe(struct platform_device *pdev) +{ + struct mic_driver *mdrv = &g_drv; + struct mic_device *mdev = &mdrv->mdev; + int rc = 0; + + mdrv->dev = &pdev->dev; + snprintf(mdrv->name, sizeof(mic_driver_name), mic_driver_name); + + mdev->mmio.pa = MIC_X100_MMIO_BASE; + mdev->mmio.len = MIC_X100_MMIO_LEN; + mdev->mmio.va = ioremap(MIC_X100_MMIO_BASE, MIC_X100_MMIO_LEN); + if (!mdev->mmio.va) { + dev_err(&pdev->dev, "Cannot remap MMIO BAR\n"); + rc = -EIO; + goto done; + } + mic_hw_intr_init(mdrv); + rc = mic_driver_init(mdrv); + if (rc) { + dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc); + goto iounmap; + } +done: + return rc; +iounmap: + iounmap(mdev->mmio.va); + return rc; +} + +static int mic_remove(struct platform_device *pdev) +{ + struct mic_driver *mdrv = &g_drv; + struct mic_device *mdev = &mdrv->mdev; + + mic_driver_uninit(mdrv); + iounmap(mdev->mmio.va); + return 0; +} + +static void mic_platform_shutdown(struct platform_device *pdev) +{ + mic_remove(pdev); +} + +static struct platform_device mic_platform_dev = { + .name = mic_driver_name, + .id = 0, + .num_resources = 0, +}; + +static struct platform_driver __refdata mic_platform_driver = { + .probe = mic_probe, + .remove = mic_remove, + .shutdown = mic_platform_shutdown, + .driver = { + .name = mic_driver_name, + .owner = THIS_MODULE, + }, +}; + +static int __init mic_init(void) +{ + int ret; + struct cpuinfo_x86 *c = &cpu_data(0); + + if (!(c->x86 == 11 && c->x86_model == 1)) { + ret = -ENODEV; + pr_err("%s not running on X100 ret %d\n", __func__, ret); + goto done; + } + + mic_init_card_debugfs(); + ret = platform_device_register(&mic_platform_dev); + if (ret) { + pr_err("platform_device_register ret %d\n", ret); + goto cleanup_debugfs; + } + ret = platform_driver_register(&mic_platform_driver); + if (ret) { + pr_err("platform_driver_register ret %d\n", ret); + goto device_unregister; + } + return ret; + +device_unregister: + platform_device_unregister(&mic_platform_dev); +cleanup_debugfs: + mic_exit_card_debugfs(); +done: + return ret; +} + +static void __exit mic_exit(void) +{ + platform_driver_unregister(&mic_platform_driver); + platform_device_unregister(&mic_platform_dev); + mic_exit_card_debugfs(); +} + +module_init(mic_init); +module_exit(mic_exit); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel(R) MIC X100 Card driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/mic/card/mic_x100.h b/drivers/misc/mic/card/mic_x100.h new file mode 100644 index 000000000000..d66ea55639c3 --- /dev/null +++ b/drivers/misc/mic/card/mic_x100.h @@ -0,0 +1,48 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2013 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Disclaimer: The codes contained in these modules may be specific to + * the Intel Software Development Platform codenamed: Knights Ferry, and + * the Intel product codenamed: Knights Corner, and are not backward + * compatible with other Intel products. Additionally, Intel will NOT + * support the codes or instruction set in future products. + * + * Intel MIC Card driver. + * + */ +#ifndef _MIC_X100_CARD_H_ +#define _MIC_X100_CARD_H_ + +#define MIC_X100_MMIO_BASE 0x08007C0000ULL +#define MIC_X100_MMIO_LEN 0x00020000ULL +#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000ULL + +#define MIC_X100_SBOX_SPAD0 0x0000AB20 +#define MIC_X100_SBOX_SDBIC0 0x0000CC90 +#define MIC_X100_SBOX_SDBIC0_DBREQ_BIT 0x80000000 +#define MIC_X100_SBOX_RDMASR0 0x0000B180 + +#define MIC_X100_MAX_DOORBELL_IDX 8 + +#define MIC_X100_NUM_SBOX_IRQ 8 +#define MIC_X100_NUM_RDMASR_IRQ 8 +#define MIC_X100_SBOX_IRQ_BASE 0 +#define MIC_X100_RDMASR_IRQ_BASE 17 + +#define MIC_X100_IRQ_BASE 26 + +#endif |