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-rw-r--r--drivers/misc/mic/host/Makefile14
-rw-r--r--drivers/misc/mic/host/mic_boot.c300
-rw-r--r--drivers/misc/mic/host/mic_debugfs.c491
-rw-r--r--drivers/misc/mic/host/mic_device.h203
-rw-r--r--drivers/misc/mic/host/mic_fops.c222
-rw-r--r--drivers/misc/mic/host/mic_fops.h32
-rw-r--r--drivers/misc/mic/host/mic_intr.c630
-rw-r--r--drivers/misc/mic/host/mic_intr.h137
-rw-r--r--drivers/misc/mic/host/mic_main.c536
-rw-r--r--drivers/misc/mic/host/mic_smpt.c442
-rw-r--r--drivers/misc/mic/host/mic_smpt.h98
-rw-r--r--drivers/misc/mic/host/mic_sysfs.c459
-rw-r--r--drivers/misc/mic/host/mic_virtio.c700
-rw-r--r--drivers/misc/mic/host/mic_virtio.h138
-rw-r--r--drivers/misc/mic/host/mic_x100.c570
-rw-r--r--drivers/misc/mic/host/mic_x100.h98
16 files changed, 5070 insertions, 0 deletions
diff --git a/drivers/misc/mic/host/Makefile b/drivers/misc/mic/host/Makefile
new file mode 100644
index 000000000000..c2197f999394
--- /dev/null
+++ b/drivers/misc/mic/host/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile - Intel MIC Linux driver.
+# Copyright(c) 2013, Intel Corporation.
+#
+obj-$(CONFIG_INTEL_MIC_HOST) += mic_host.o
+mic_host-objs := mic_main.o
+mic_host-objs += mic_x100.o
+mic_host-objs += mic_sysfs.o
+mic_host-objs += mic_smpt.o
+mic_host-objs += mic_intr.o
+mic_host-objs += mic_boot.o
+mic_host-objs += mic_debugfs.o
+mic_host-objs += mic_fops.o
+mic_host-objs += mic_virtio.o
diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c
new file mode 100644
index 000000000000..b079c65eed6d
--- /dev/null
+++ b/drivers/misc/mic/host/mic_boot.c
@@ -0,0 +1,300 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/pci.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_smpt.h"
+#include "mic_virtio.h"
+
+/**
+ * mic_reset - Reset the MIC device.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_reset(struct mic_device *mdev)
+{
+ int i;
+
+#define MIC_RESET_TO (45)
+
+ INIT_COMPLETION(mdev->reset_wait);
+ mdev->ops->reset_fw_ready(mdev);
+ mdev->ops->reset(mdev);
+
+ for (i = 0; i < MIC_RESET_TO; i++) {
+ if (mdev->ops->is_fw_ready(mdev))
+ goto done;
+ /*
+ * Resets typically take 10s of seconds to complete.
+ * Since an MMIO read is required to check if the
+ * firmware is ready or not, a 1 second delay works nicely.
+ */
+ msleep(1000);
+ }
+ mic_set_state(mdev, MIC_RESET_FAILED);
+done:
+ complete_all(&mdev->reset_wait);
+}
+
+/* Initialize the MIC bootparams */
+void mic_bootparam_init(struct mic_device *mdev)
+{
+ struct mic_bootparam *bootparam = mdev->dp;
+
+ bootparam->magic = MIC_MAGIC;
+ bootparam->c2h_shutdown_db = mdev->shutdown_db;
+ bootparam->h2c_shutdown_db = -1;
+ bootparam->h2c_config_db = -1;
+ bootparam->shutdown_status = 0;
+ bootparam->shutdown_card = 0;
+}
+
+/**
+ * mic_start - Start the MIC.
+ * @mdev: pointer to mic_device instance
+ * @buf: buffer containing boot string including firmware/ramdisk path.
+ *
+ * This function prepares an MIC for boot and initiates boot.
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+int mic_start(struct mic_device *mdev, const char *buf)
+{
+ int rc;
+ mutex_lock(&mdev->mic_mutex);
+retry:
+ if (MIC_OFFLINE != mdev->state) {
+ rc = -EINVAL;
+ goto unlock_ret;
+ }
+ if (!mdev->ops->is_fw_ready(mdev)) {
+ mic_reset(mdev);
+ /*
+ * The state will either be MIC_OFFLINE if the reset succeeded
+ * or MIC_RESET_FAILED if the firmware reset failed.
+ */
+ goto retry;
+ }
+ rc = mdev->ops->load_mic_fw(mdev, buf);
+ if (rc)
+ goto unlock_ret;
+ mic_smpt_restore(mdev);
+ mic_intr_restore(mdev);
+ mdev->intr_ops->enable_interrupts(mdev);
+ mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
+ mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
+ mdev->ops->send_firmware_intr(mdev);
+ mic_set_state(mdev, MIC_ONLINE);
+unlock_ret:
+ mutex_unlock(&mdev->mic_mutex);
+ return rc;
+}
+
+/**
+ * mic_stop - Prepare the MIC for reset and trigger reset.
+ * @mdev: pointer to mic_device instance
+ * @force: force a MIC to reset even if it is already offline.
+ *
+ * RETURNS: None.
+ */
+void mic_stop(struct mic_device *mdev, bool force)
+{
+ mutex_lock(&mdev->mic_mutex);
+ if (MIC_OFFLINE != mdev->state || force) {
+ mic_virtio_reset_devices(mdev);
+ mic_bootparam_init(mdev);
+ mic_reset(mdev);
+ if (MIC_RESET_FAILED == mdev->state)
+ goto unlock;
+ mic_set_shutdown_status(mdev, MIC_NOP);
+ if (MIC_SUSPENDED != mdev->state)
+ mic_set_state(mdev, MIC_OFFLINE);
+ }
+unlock:
+ mutex_unlock(&mdev->mic_mutex);
+}
+
+/**
+ * mic_shutdown - Initiate MIC shutdown.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: None.
+ */
+void mic_shutdown(struct mic_device *mdev)
+{
+ struct mic_bootparam *bootparam = mdev->dp;
+ s8 db = bootparam->h2c_shutdown_db;
+
+ mutex_lock(&mdev->mic_mutex);
+ if (MIC_ONLINE == mdev->state && db != -1) {
+ bootparam->shutdown_card = 1;
+ mdev->ops->send_intr(mdev, db);
+ mic_set_state(mdev, MIC_SHUTTING_DOWN);
+ }
+ mutex_unlock(&mdev->mic_mutex);
+}
+
+/**
+ * mic_shutdown_work - Handle shutdown interrupt from MIC.
+ * @work: The work structure.
+ *
+ * This work is scheduled whenever the host has received a shutdown
+ * interrupt from the MIC.
+ */
+void mic_shutdown_work(struct work_struct *work)
+{
+ struct mic_device *mdev = container_of(work, struct mic_device,
+ shutdown_work);
+ struct mic_bootparam *bootparam = mdev->dp;
+
+ mutex_lock(&mdev->mic_mutex);
+ mic_set_shutdown_status(mdev, bootparam->shutdown_status);
+ bootparam->shutdown_status = 0;
+
+ /*
+ * if state is MIC_SUSPENDED, OSPM suspend is in progress. We do not
+ * change the state here so as to prevent users from booting the card
+ * during and after the suspend operation.
+ */
+ if (MIC_SHUTTING_DOWN != mdev->state &&
+ MIC_SUSPENDED != mdev->state)
+ mic_set_state(mdev, MIC_SHUTTING_DOWN);
+ mutex_unlock(&mdev->mic_mutex);
+}
+
+/**
+ * mic_reset_trigger_work - Trigger MIC reset.
+ * @work: The work structure.
+ *
+ * This work is scheduled whenever the host wants to reset the MIC.
+ */
+void mic_reset_trigger_work(struct work_struct *work)
+{
+ struct mic_device *mdev = container_of(work, struct mic_device,
+ reset_trigger_work);
+
+ mic_stop(mdev, false);
+}
+
+/**
+ * mic_complete_resume - Complete MIC Resume after an OSPM suspend/hibernate
+ * event.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: None.
+ */
+void mic_complete_resume(struct mic_device *mdev)
+{
+ if (mdev->state != MIC_SUSPENDED) {
+ dev_warn(mdev->sdev->parent, "state %d should be %d\n",
+ mdev->state, MIC_SUSPENDED);
+ return;
+ }
+
+ /* Make sure firmware is ready */
+ if (!mdev->ops->is_fw_ready(mdev))
+ mic_stop(mdev, true);
+
+ mutex_lock(&mdev->mic_mutex);
+ mic_set_state(mdev, MIC_OFFLINE);
+ mutex_unlock(&mdev->mic_mutex);
+}
+
+/**
+ * mic_prepare_suspend - Handle suspend notification for the MIC device.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: None.
+ */
+void mic_prepare_suspend(struct mic_device *mdev)
+{
+ int rc;
+
+#define MIC_SUSPEND_TIMEOUT (60 * HZ)
+
+ mutex_lock(&mdev->mic_mutex);
+ switch (mdev->state) {
+ case MIC_OFFLINE:
+ /*
+ * Card is already offline. Set state to MIC_SUSPENDED
+ * to prevent users from booting the card.
+ */
+ mic_set_state(mdev, MIC_SUSPENDED);
+ mutex_unlock(&mdev->mic_mutex);
+ break;
+ case MIC_ONLINE:
+ /*
+ * Card is online. Set state to MIC_SUSPENDING and notify
+ * MIC user space daemon which will issue card
+ * shutdown and reset.
+ */
+ mic_set_state(mdev, MIC_SUSPENDING);
+ mutex_unlock(&mdev->mic_mutex);
+ rc = wait_for_completion_timeout(&mdev->reset_wait,
+ MIC_SUSPEND_TIMEOUT);
+ /* Force reset the card if the shutdown completion timed out */
+ if (!rc) {
+ mutex_lock(&mdev->mic_mutex);
+ mic_set_state(mdev, MIC_SUSPENDED);
+ mutex_unlock(&mdev->mic_mutex);
+ mic_stop(mdev, true);
+ }
+ break;
+ case MIC_SHUTTING_DOWN:
+ /*
+ * Card is shutting down. Set state to MIC_SUSPENDED
+ * to prevent further boot of the card.
+ */
+ mic_set_state(mdev, MIC_SUSPENDED);
+ mutex_unlock(&mdev->mic_mutex);
+ rc = wait_for_completion_timeout(&mdev->reset_wait,
+ MIC_SUSPEND_TIMEOUT);
+ /* Force reset the card if the shutdown completion timed out */
+ if (!rc)
+ mic_stop(mdev, true);
+ break;
+ default:
+ mutex_unlock(&mdev->mic_mutex);
+ break;
+ }
+}
+
+/**
+ * mic_suspend - Initiate MIC suspend. Suspend merely issues card shutdown.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: None.
+ */
+void mic_suspend(struct mic_device *mdev)
+{
+ struct mic_bootparam *bootparam = mdev->dp;
+ s8 db = bootparam->h2c_shutdown_db;
+
+ mutex_lock(&mdev->mic_mutex);
+ if (MIC_SUSPENDING == mdev->state && db != -1) {
+ bootparam->shutdown_card = 1;
+ mdev->ops->send_intr(mdev, db);
+ mic_set_state(mdev, MIC_SUSPENDED);
+ }
+ mutex_unlock(&mdev->mic_mutex);
+}
diff --git a/drivers/misc/mic/host/mic_debugfs.c b/drivers/misc/mic/host/mic_debugfs.c
new file mode 100644
index 000000000000..028ba5d6fd1c
--- /dev/null
+++ b/drivers/misc/mic/host/mic_debugfs.c
@@ -0,0 +1,491 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/debugfs.h>
+#include <linux/pci.h>
+#include <linux/seq_file.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_smpt.h"
+#include "mic_virtio.h"
+
+/* Debugfs parent dir */
+static struct dentry *mic_dbg;
+
+/**
+ * mic_log_buf_show - Display MIC kernel log buffer.
+ *
+ * log_buf addr/len is read from System.map by user space
+ * and populated in sysfs entries.
+ */
+static int mic_log_buf_show(struct seq_file *s, void *unused)
+{
+ void __iomem *log_buf_va;
+ int __iomem *log_buf_len_va;
+ struct mic_device *mdev = s->private;
+ void *kva;
+ int size;
+ unsigned long aper_offset;
+
+ if (!mdev || !mdev->log_buf_addr || !mdev->log_buf_len)
+ goto done;
+ /*
+ * Card kernel will never be relocated and any kernel text/data mapping
+ * can be translated to phys address by subtracting __START_KERNEL_map.
+ */
+ aper_offset = (unsigned long)mdev->log_buf_len - __START_KERNEL_map;
+ log_buf_len_va = mdev->aper.va + aper_offset;
+ aper_offset = (unsigned long)mdev->log_buf_addr - __START_KERNEL_map;
+ log_buf_va = mdev->aper.va + aper_offset;
+ size = ioread32(log_buf_len_va);
+
+ kva = kmalloc(size, GFP_KERNEL);
+ if (!kva)
+ goto done;
+ mutex_lock(&mdev->mic_mutex);
+ memcpy_fromio(kva, log_buf_va, size);
+ switch (mdev->state) {
+ case MIC_ONLINE:
+ /* Fall through */
+ case MIC_SHUTTING_DOWN:
+ seq_write(s, kva, size);
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&mdev->mic_mutex);
+ kfree(kva);
+done:
+ return 0;
+}
+
+static int mic_log_buf_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_log_buf_show, inode->i_private);
+}
+
+static int mic_log_buf_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations log_buf_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_log_buf_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_log_buf_release
+};
+
+static int mic_smpt_show(struct seq_file *s, void *pos)
+{
+ int i;
+ struct mic_device *mdev = s->private;
+ unsigned long flags;
+
+ seq_printf(s, "MIC %-2d |%-10s| %-14s %-10s\n",
+ mdev->id, "SMPT entry", "SW DMA addr", "RefCount");
+ seq_puts(s, "====================================================\n");
+
+ if (mdev->smpt) {
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+ spin_lock_irqsave(&smpt_info->smpt_lock, flags);
+ for (i = 0; i < smpt_info->info.num_reg; i++) {
+ seq_printf(s, "%9s|%-10d| %-#14llx %-10lld\n",
+ " ", i, smpt_info->entry[i].dma_addr,
+ smpt_info->entry[i].ref_count);
+ }
+ spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
+ }
+ seq_puts(s, "====================================================\n");
+ return 0;
+}
+
+static int mic_smpt_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_smpt_show, inode->i_private);
+}
+
+static int mic_smpt_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations smpt_file_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_smpt_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_smpt_debug_release
+};
+
+static int mic_soft_reset_show(struct seq_file *s, void *pos)
+{
+ struct mic_device *mdev = s->private;
+
+ mic_stop(mdev, true);
+ return 0;
+}
+
+static int mic_soft_reset_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_soft_reset_show, inode->i_private);
+}
+
+static int mic_soft_reset_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations soft_reset_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_soft_reset_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_soft_reset_debug_release
+};
+
+static int mic_post_code_show(struct seq_file *s, void *pos)
+{
+ struct mic_device *mdev = s->private;
+ u32 reg = mdev->ops->get_postcode(mdev);
+
+ seq_printf(s, "%c%c", reg & 0xff, (reg >> 8) & 0xff);
+ return 0;
+}
+
+static int mic_post_code_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_post_code_show, inode->i_private);
+}
+
+static int mic_post_code_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations post_code_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_post_code_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_post_code_debug_release
+};
+
+static int mic_dp_show(struct seq_file *s, void *pos)
+{
+ struct mic_device *mdev = s->private;
+ struct mic_device_desc *d;
+ struct mic_device_ctrl *dc;
+ struct mic_vqconfig *vqconfig;
+ __u32 *features;
+ __u8 *config;
+ struct mic_bootparam *bootparam = mdev->dp;
+ int i, j;
+
+ seq_printf(s, "Bootparam: magic 0x%x\n",
+ bootparam->magic);
+ seq_printf(s, "Bootparam: h2c_shutdown_db %d\n",
+ bootparam->h2c_shutdown_db);
+ seq_printf(s, "Bootparam: h2c_config_db %d\n",
+ bootparam->h2c_config_db);
+ seq_printf(s, "Bootparam: c2h_shutdown_db %d\n",
+ bootparam->c2h_shutdown_db);
+ seq_printf(s, "Bootparam: shutdown_status %d\n",
+ bootparam->shutdown_status);
+ seq_printf(s, "Bootparam: shutdown_card %d\n",
+ bootparam->shutdown_card);
+
+ for (i = sizeof(*bootparam); i < MIC_DP_SIZE;
+ i += mic_total_desc_size(d)) {
+ d = mdev->dp + i;
+ dc = (void *)d + mic_aligned_desc_size(d);
+
+ /* end of list */
+ if (d->type == 0)
+ break;
+
+ if (d->type == -1)
+ continue;
+
+ seq_printf(s, "Type %d ", d->type);
+ seq_printf(s, "Num VQ %d ", d->num_vq);
+ seq_printf(s, "Feature Len %d\n", d->feature_len);
+ seq_printf(s, "Config Len %d ", d->config_len);
+ seq_printf(s, "Shutdown Status %d\n", d->status);
+
+ for (j = 0; j < d->num_vq; j++) {
+ vqconfig = mic_vq_config(d) + j;
+ seq_printf(s, "vqconfig[%d]: ", j);
+ seq_printf(s, "address 0x%llx ", vqconfig->address);
+ seq_printf(s, "num %d ", vqconfig->num);
+ seq_printf(s, "used address 0x%llx\n",
+ vqconfig->used_address);
+ }
+
+ features = (__u32 *)mic_vq_features(d);
+ seq_printf(s, "Features: Host 0x%x ", features[0]);
+ seq_printf(s, "Guest 0x%x\n", features[1]);
+
+ config = mic_vq_configspace(d);
+ for (j = 0; j < d->config_len; j++)
+ seq_printf(s, "config[%d]=%d\n", j, config[j]);
+
+ seq_puts(s, "Device control:\n");
+ seq_printf(s, "Config Change %d ", dc->config_change);
+ seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
+ seq_printf(s, "Guest Ack %d ", dc->guest_ack);
+ seq_printf(s, "Host ack %d\n", dc->host_ack);
+ seq_printf(s, "Used address updated %d ",
+ dc->used_address_updated);
+ seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
+ seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
+ seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
+ }
+
+ return 0;
+}
+
+static int mic_dp_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_dp_show, inode->i_private);
+}
+
+static int mic_dp_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations dp_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_dp_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_dp_debug_release
+};
+
+static int mic_vdev_info_show(struct seq_file *s, void *unused)
+{
+ struct mic_device *mdev = s->private;
+ struct list_head *pos, *tmp;
+ struct mic_vdev *mvdev;
+ int i, j;
+
+ mutex_lock(&mdev->mic_mutex);
+ list_for_each_safe(pos, tmp, &mdev->vdev_list) {
+ mvdev = list_entry(pos, struct mic_vdev, list);
+ seq_printf(s, "VDEV type %d state %s in %ld out %ld\n",
+ mvdev->virtio_id,
+ mic_vdevup(mvdev) ? "UP" : "DOWN",
+ mvdev->in_bytes,
+ mvdev->out_bytes);
+ for (i = 0; i < MIC_MAX_VRINGS; i++) {
+ struct vring_desc *desc;
+ struct vring_avail *avail;
+ struct vring_used *used;
+ struct mic_vringh *mvr = &mvdev->mvr[i];
+ struct vringh *vrh = &mvr->vrh;
+ int num = vrh->vring.num;
+ if (!num)
+ continue;
+ desc = vrh->vring.desc;
+ seq_printf(s, "vring i %d avail_idx %d",
+ i, mvr->vring.info->avail_idx & (num - 1));
+ seq_printf(s, " vring i %d avail_idx %d\n",
+ i, mvr->vring.info->avail_idx);
+ seq_printf(s, "vrh i %d weak_barriers %d",
+ i, vrh->weak_barriers);
+ seq_printf(s, " last_avail_idx %d last_used_idx %d",
+ vrh->last_avail_idx, vrh->last_used_idx);
+ seq_printf(s, " completed %d\n", vrh->completed);
+ for (j = 0; j < num; j++) {
+ seq_printf(s, "desc[%d] addr 0x%llx len %d",
+ j, desc->addr, desc->len);
+ seq_printf(s, " flags 0x%x next %d\n",
+ desc->flags, desc->next);
+ desc++;
+ }
+ avail = vrh->vring.avail;
+ seq_printf(s, "avail flags 0x%x idx %d\n",
+ avail->flags, avail->idx & (num - 1));
+ seq_printf(s, "avail flags 0x%x idx %d\n",
+ avail->flags, avail->idx);
+ for (j = 0; j < num; j++)
+ seq_printf(s, "avail ring[%d] %d\n",
+ j, avail->ring[j]);
+ used = vrh->vring.used;
+ seq_printf(s, "used flags 0x%x idx %d\n",
+ used->flags, used->idx & (num - 1));
+ seq_printf(s, "used flags 0x%x idx %d\n",
+ used->flags, used->idx);
+ for (j = 0; j < num; j++)
+ seq_printf(s, "used ring[%d] id %d len %d\n",
+ j, used->ring[j].id,
+ used->ring[j].len);
+ }
+ }
+ mutex_unlock(&mdev->mic_mutex);
+
+ return 0;
+}
+
+static int mic_vdev_info_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_vdev_info_show, inode->i_private);
+}
+
+static int mic_vdev_info_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations vdev_info_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_vdev_info_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_vdev_info_debug_release
+};
+
+static int mic_msi_irq_info_show(struct seq_file *s, void *pos)
+{
+ struct mic_device *mdev = s->private;
+ int reg;
+ int i, j;
+ u16 entry;
+ u16 vector;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+
+ if (pci_dev_msi_enabled(pdev)) {
+ for (i = 0; i < mdev->irq_info.num_vectors; i++) {
+ if (pdev->msix_enabled) {
+ entry = mdev->irq_info.msix_entries[i].entry;
+ vector = mdev->irq_info.msix_entries[i].vector;
+ } else {
+ entry = 0;
+ vector = pdev->irq;
+ }
+
+ reg = mdev->intr_ops->read_msi_to_src_map(mdev, entry);
+
+ seq_printf(s, "%s %-10d %s %-10d MXAR[%d]: %08X\n",
+ "IRQ:", vector, "Entry:", entry, i, reg);
+
+ seq_printf(s, "%-10s", "offset:");
+ for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
+ seq_printf(s, "%4d ", j);
+ seq_puts(s, "\n");
+
+
+ seq_printf(s, "%-10s", "count:");
+ for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
+ seq_printf(s, "%4d ",
+ (mdev->irq_info.mic_msi_map[i] &
+ BIT(j)) ? 1 : 0);
+ seq_puts(s, "\n\n");
+ }
+ } else {
+ seq_puts(s, "MSI/MSIx interrupts not enabled\n");
+ }
+
+ return 0;
+}
+
+static int mic_msi_irq_info_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_msi_irq_info_show, inode->i_private);
+}
+
+static int
+mic_msi_irq_info_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations msi_irq_info_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_msi_irq_info_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_msi_irq_info_debug_release
+};
+
+/**
+ * mic_create_debug_dir - Initialize MIC debugfs entries.
+ */
+void mic_create_debug_dir(struct mic_device *mdev)
+{
+ if (!mic_dbg)
+ return;
+
+ mdev->dbg_dir = debugfs_create_dir(dev_name(mdev->sdev), mic_dbg);
+ if (!mdev->dbg_dir)
+ return;
+
+ debugfs_create_file("log_buf", 0444, mdev->dbg_dir, mdev, &log_buf_ops);
+
+ debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev, &smpt_file_ops);
+
+ debugfs_create_file("soft_reset", 0444, mdev->dbg_dir, mdev,
+ &soft_reset_ops);
+
+ debugfs_create_file("post_code", 0444, mdev->dbg_dir, mdev,
+ &post_code_ops);
+
+ debugfs_create_file("dp", 0444, mdev->dbg_dir, mdev, &dp_ops);
+
+ debugfs_create_file("vdev_info", 0444, mdev->dbg_dir, mdev,
+ &vdev_info_ops);
+
+ debugfs_create_file("msi_irq_info", 0444, mdev->dbg_dir, mdev,
+ &msi_irq_info_ops);
+}
+
+/**
+ * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
+ */
+void mic_delete_debug_dir(struct mic_device *mdev)
+{
+ if (!mdev->dbg_dir)
+ return;
+
+ debugfs_remove_recursive(mdev->dbg_dir);
+}
+
+/**
+ * mic_init_debugfs - Initialize global debugfs entry.
+ */
+void __init mic_init_debugfs(void)
+{
+ mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ if (!mic_dbg)
+ pr_err("can't create debugfs dir\n");
+}
+
+/**
+ * mic_exit_debugfs - Uninitialize global debugfs entry
+ */
+void mic_exit_debugfs(void)
+{
+ debugfs_remove(mic_dbg);
+}
diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h
new file mode 100644
index 000000000000..3574cc375bb9
--- /dev/null
+++ b/drivers/misc/mic/host/mic_device.h
@@ -0,0 +1,203 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef _MIC_DEVICE_H_
+#define _MIC_DEVICE_H_
+
+#include <linux/cdev.h>
+#include <linux/idr.h>
+#include <linux/notifier.h>
+
+#include "mic_intr.h"
+
+/* The maximum number of MIC devices supported in a single host system. */
+#define MIC_MAX_NUM_DEVS 256
+
+/**
+ * enum mic_hw_family - The hardware family to which a device belongs.
+ */
+enum mic_hw_family {
+ MIC_FAMILY_X100 = 0,
+ MIC_FAMILY_UNKNOWN
+};
+
+/**
+ * enum mic_stepping - MIC stepping ids.
+ */
+enum mic_stepping {
+ MIC_A0_STEP = 0x0,
+ MIC_B0_STEP = 0x10,
+ MIC_B1_STEP = 0x11,
+ MIC_C0_STEP = 0x20,
+};
+
+/**
+ * struct mic_device - MIC device information for each card.
+ *
+ * @mmio: MMIO bar information.
+ * @aper: Aperture bar information.
+ * @family: The MIC family to which this device belongs.
+ * @ops: MIC HW specific operations.
+ * @id: The unique device id for this MIC device.
+ * @stepping: Stepping ID.
+ * @attr_group: Pointer to list of sysfs attribute groups.
+ * @sdev: Device for sysfs entries.
+ * @mic_mutex: Mutex for synchronizing access to mic_device.
+ * @intr_ops: HW specific interrupt operations.
+ * @smpt_ops: Hardware specific SMPT operations.
+ * @smpt: MIC SMPT information.
+ * @intr_info: H/W specific interrupt information.
+ * @irq_info: The OS specific irq information
+ * @dbg_dir: debugfs directory of this MIC device.
+ * @cmdline: Kernel command line.
+ * @firmware: Firmware file name.
+ * @ramdisk: Ramdisk file name.
+ * @bootmode: Boot mode i.e. "linux" or "elf" for flash updates.
+ * @bootaddr: MIC boot address.
+ * @reset_trigger_work: Work for triggering reset requests.
+ * @shutdown_work: Work for handling shutdown interrupts.
+ * @state: MIC state.
+ * @shutdown_status: MIC status reported by card for shutdown/crashes.
+ * @state_sysfs: Sysfs dirent for notifying ring 3 about MIC state changes.
+ * @reset_wait: Waitqueue for sleeping while reset completes.
+ * @log_buf_addr: Log buffer address for MIC.
+ * @log_buf_len: Log buffer length address for MIC.
+ * @dp: virtio device page
+ * @dp_dma_addr: virtio device page DMA address.
+ * @shutdown_db: shutdown doorbell.
+ * @shutdown_cookie: shutdown cookie.
+ * @cdev: Character device for MIC.
+ * @vdev_list: list of virtio devices.
+ * @pm_notifier: Handles PM notifications from the OS.
+ */
+struct mic_device {
+ struct mic_mw mmio;
+ struct mic_mw aper;
+ enum mic_hw_family family;
+ struct mic_hw_ops *ops;
+ int id;
+ enum mic_stepping stepping;
+ const struct attribute_group **attr_group;
+ struct device *sdev;
+ struct mutex mic_mutex;
+ struct mic_hw_intr_ops *intr_ops;
+ struct mic_smpt_ops *smpt_ops;
+ struct mic_smpt_info *smpt;
+ struct mic_intr_info *intr_info;
+ struct mic_irq_info irq_info;
+ struct dentry *dbg_dir;
+ char *cmdline;
+ char *firmware;
+ char *ramdisk;
+ char *bootmode;
+ u32 bootaddr;
+ struct work_struct reset_trigger_work;
+ struct work_struct shutdown_work;
+ u8 state;
+ u8 shutdown_status;
+ struct sysfs_dirent *state_sysfs;
+ struct completion reset_wait;
+ void *log_buf_addr;
+ int *log_buf_len;
+ void *dp;
+ dma_addr_t dp_dma_addr;
+ int shutdown_db;
+ struct mic_irq *shutdown_cookie;
+ struct cdev cdev;
+ struct list_head vdev_list;
+ struct notifier_block pm_notifier;
+};
+
+/**
+ * struct mic_hw_ops - MIC HW specific operations.
+ * @aper_bar: Aperture bar resource number.
+ * @mmio_bar: MMIO bar resource number.
+ * @read_spad: Read from scratch pad register.
+ * @write_spad: Write to scratch pad register.
+ * @send_intr: Send an interrupt for a particular doorbell on the card.
+ * @ack_interrupt: Hardware specific operations to ack the h/w on
+ * receipt of an interrupt.
+ * @reset: Reset the remote processor.
+ * @reset_fw_ready: Reset firmware ready field.
+ * @is_fw_ready: Check if firmware is ready for OS download.
+ * @send_firmware_intr: Send an interrupt to the card firmware.
+ * @load_mic_fw: Load firmware segments required to boot the card
+ * into card memory. This includes the kernel, command line, ramdisk etc.
+ * @get_postcode: Get post code status from firmware.
+ */
+struct mic_hw_ops {
+ u8 aper_bar;
+ u8 mmio_bar;
+ u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
+ void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
+ void (*send_intr)(struct mic_device *mdev, int doorbell);
+ u32 (*ack_interrupt)(struct mic_device *mdev);
+ void (*reset)(struct mic_device *mdev);
+ void (*reset_fw_ready)(struct mic_device *mdev);
+ bool (*is_fw_ready)(struct mic_device *mdev);
+ void (*send_firmware_intr)(struct mic_device *mdev);
+ int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
+ u32 (*get_postcode)(struct mic_device *mdev);
+};
+
+/**
+ * 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);
+}
+
+void mic_sysfs_init(struct mic_device *mdev);
+int mic_start(struct mic_device *mdev, const char *buf);
+void mic_stop(struct mic_device *mdev, bool force);
+void mic_shutdown(struct mic_device *mdev);
+void mic_reset_delayed_work(struct work_struct *work);
+void mic_reset_trigger_work(struct work_struct *work);
+void mic_shutdown_work(struct work_struct *work);
+void mic_bootparam_init(struct mic_device *mdev);
+void mic_set_state(struct mic_device *mdev, u8 state);
+void mic_set_shutdown_status(struct mic_device *mdev, u8 status);
+void mic_create_debug_dir(struct mic_device *dev);
+void mic_delete_debug_dir(struct mic_device *dev);
+void __init mic_init_debugfs(void);
+void mic_exit_debugfs(void);
+void mic_prepare_suspend(struct mic_device *mdev);
+void mic_complete_resume(struct mic_device *mdev);
+void mic_suspend(struct mic_device *mdev);
+#endif
diff --git a/drivers/misc/mic/host/mic_fops.c b/drivers/misc/mic/host/mic_fops.c
new file mode 100644
index 000000000000..85776d7327f3
--- /dev/null
+++ b/drivers/misc/mic/host/mic_fops.c
@@ -0,0 +1,222 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/poll.h>
+#include <linux/pci.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_fops.h"
+#include "mic_virtio.h"
+
+int mic_open(struct inode *inode, struct file *f)
+{
+ struct mic_vdev *mvdev;
+ struct mic_device *mdev = container_of(inode->i_cdev,
+ struct mic_device, cdev);
+
+ mvdev = kzalloc(sizeof(*mvdev), GFP_KERNEL);
+ if (!mvdev)
+ return -ENOMEM;
+
+ init_waitqueue_head(&mvdev->waitq);
+ INIT_LIST_HEAD(&mvdev->list);
+ mvdev->mdev = mdev;
+ mvdev->virtio_id = -1;
+
+ f->private_data = mvdev;
+ return 0;
+}
+
+int mic_release(struct inode *inode, struct file *f)
+{
+ struct mic_vdev *mvdev = (struct mic_vdev *)f->private_data;
+
+ if (-1 != mvdev->virtio_id)
+ mic_virtio_del_device(mvdev);
+ f->private_data = NULL;
+ kfree(mvdev);
+ return 0;
+}
+
+long mic_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ struct mic_vdev *mvdev = (struct mic_vdev *)f->private_data;
+ void __user *argp = (void __user *)arg;
+ int ret;
+
+ switch (cmd) {
+ case MIC_VIRTIO_ADD_DEVICE:
+ {
+ ret = mic_virtio_add_device(mvdev, argp);
+ if (ret < 0) {
+ dev_err(mic_dev(mvdev),
+ "%s %d errno ret %d\n",
+ __func__, __LINE__, ret);
+ return ret;
+ }
+ break;
+ }
+ case MIC_VIRTIO_COPY_DESC:
+ {
+ struct mic_copy_desc copy;
+
+ ret = mic_vdev_inited(mvdev);
+ if (ret)
+ return ret;
+
+ if (copy_from_user(&copy, argp, sizeof(copy)))
+ return -EFAULT;
+
+ dev_dbg(mic_dev(mvdev),
+ "%s %d === iovcnt 0x%x vr_idx 0x%x update_used %d\n",
+ __func__, __LINE__, copy.iovcnt, copy.vr_idx,
+ copy.update_used);
+
+ ret = mic_virtio_copy_desc(mvdev, &copy);
+ if (ret < 0) {
+ dev_err(mic_dev(mvdev),
+ "%s %d errno ret %d\n",
+ __func__, __LINE__, ret);
+ return ret;
+ }
+ if (copy_to_user(
+ &((struct mic_copy_desc __user *)argp)->out_len,
+ &copy.out_len, sizeof(copy.out_len))) {
+ dev_err(mic_dev(mvdev), "%s %d errno ret %d\n",
+ __func__, __LINE__, -EFAULT);
+ return -EFAULT;
+ }
+ break;
+ }
+ case MIC_VIRTIO_CONFIG_CHANGE:
+ {
+ ret = mic_vdev_inited(mvdev);
+ if (ret)
+ return ret;
+
+ ret = mic_virtio_config_change(mvdev, argp);
+ if (ret < 0) {
+ dev_err(mic_dev(mvdev),
+ "%s %d errno ret %d\n",
+ __func__, __LINE__, ret);
+ return ret;
+ }
+ break;
+ }
+ default:
+ return -ENOIOCTLCMD;
+ };
+ return 0;
+}
+
+/*
+ * We return POLLIN | POLLOUT from poll when new buffers are enqueued, and
+ * not when previously enqueued buffers may be available. This means that
+ * in the card->host (TX) path, when userspace is unblocked by poll it
+ * must drain all available descriptors or it can stall.
+ */
+unsigned int mic_poll(struct file *f, poll_table *wait)
+{
+ struct mic_vdev *mvdev = (struct mic_vdev *)f->private_data;
+ int mask = 0;
+
+ poll_wait(f, &mvdev->waitq, wait);
+
+ if (mic_vdev_inited(mvdev)) {
+ mask = POLLERR;
+ } else if (mvdev->poll_wake) {
+ mvdev->poll_wake = 0;
+ mask = POLLIN | POLLOUT;
+ }
+
+ return mask;
+}
+
+static inline int
+mic_query_offset(struct mic_vdev *mvdev, unsigned long offset,
+ unsigned long *size, unsigned long *pa)
+{
+ struct mic_device *mdev = mvdev->mdev;
+ unsigned long start = MIC_DP_SIZE;
+ int i;
+
+ /*
+ * MMAP interface is as follows:
+ * offset region
+ * 0x0 virtio device_page
+ * 0x1000 first vring
+ * 0x1000 + size of 1st vring second vring
+ * ....
+ */
+ if (!offset) {
+ *pa = virt_to_phys(mdev->dp);
+ *size = MIC_DP_SIZE;
+ return 0;
+ }
+
+ for (i = 0; i < mvdev->dd->num_vq; i++) {
+ struct mic_vringh *mvr = &mvdev->mvr[i];
+ if (offset == start) {
+ *pa = virt_to_phys(mvr->vring.va);
+ *size = mvr->vring.len;
+ return 0;
+ }
+ start += mvr->vring.len;
+ }
+ return -1;
+}
+
+/*
+ * Maps the device page and virtio rings to user space for readonly access.
+ */
+int
+mic_mmap(struct file *f, struct vm_area_struct *vma)
+{
+ struct mic_vdev *mvdev = (struct mic_vdev *)f->private_data;
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ unsigned long pa, size = vma->vm_end - vma->vm_start, size_rem = size;
+ int i, err;
+
+ err = mic_vdev_inited(mvdev);
+ if (err)
+ return err;
+
+ if (vma->vm_flags & VM_WRITE)
+ return -EACCES;
+
+ while (size_rem) {
+ i = mic_query_offset(mvdev, offset, &size, &pa);
+ if (i < 0)
+ return -EINVAL;
+ err = remap_pfn_range(vma, vma->vm_start + offset,
+ pa >> PAGE_SHIFT, size, vma->vm_page_prot);
+ if (err)
+ return err;
+ dev_dbg(mic_dev(mvdev),
+ "%s %d type %d size 0x%lx off 0x%lx pa 0x%lx vma 0x%lx\n",
+ __func__, __LINE__, mvdev->virtio_id, size, offset,
+ pa, vma->vm_start + offset);
+ size_rem -= size;
+ offset += size;
+ }
+ return 0;
+}
diff --git a/drivers/misc/mic/host/mic_fops.h b/drivers/misc/mic/host/mic_fops.h
new file mode 100644
index 000000000000..dc3893dff667
--- /dev/null
+++ b/drivers/misc/mic/host/mic_fops.h
@@ -0,0 +1,32 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef _MIC_FOPS_H_
+#define _MIC_FOPS_H_
+
+int mic_open(struct inode *inode, struct file *filp);
+int mic_release(struct inode *inode, struct file *filp);
+ssize_t mic_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *pos);
+long mic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+int mic_mmap(struct file *f, struct vm_area_struct *vma);
+unsigned int mic_poll(struct file *f, poll_table *wait);
+
+#endif
diff --git a/drivers/misc/mic/host/mic_intr.c b/drivers/misc/mic/host/mic_intr.c
new file mode 100644
index 000000000000..f9c29bc918bc
--- /dev/null
+++ b/drivers/misc/mic/host/mic_intr.c
@@ -0,0 +1,630 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+
+/*
+ * mic_invoke_callback - Invoke callback functions registered for
+ * the corresponding source id.
+ *
+ * @mdev: pointer to the mic_device instance
+ * @idx: The interrupt source id.
+ *
+ * Returns none.
+ */
+static inline void mic_invoke_callback(struct mic_device *mdev, int idx)
+{
+ struct mic_intr_cb *intr_cb;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+
+ spin_lock(&mdev->irq_info.mic_intr_lock);
+ list_for_each_entry(intr_cb, &mdev->irq_info.cb_list[idx], list)
+ if (intr_cb->func)
+ intr_cb->func(pdev->irq, intr_cb->data);
+ spin_unlock(&mdev->irq_info.mic_intr_lock);
+}
+
+/**
+ * mic_interrupt - Generic interrupt handler for
+ * MSI and INTx based interrupts.
+ */
+static irqreturn_t mic_interrupt(int irq, void *dev)
+{
+ struct mic_device *mdev = dev;
+ struct mic_intr_info *info = mdev->intr_info;
+ u32 mask;
+ int i;
+
+ mask = mdev->ops->ack_interrupt(mdev);
+ if (!mask)
+ return IRQ_NONE;
+
+ for (i = info->intr_start_idx[MIC_INTR_DB];
+ i < info->intr_len[MIC_INTR_DB]; i++)
+ if (mask & BIT(i))
+ mic_invoke_callback(mdev, i);
+
+ return IRQ_HANDLED;
+}
+
+/* Return the interrupt offset from the index. Index is 0 based. */
+static u16 mic_map_src_to_offset(struct mic_device *mdev,
+ int intr_src, enum mic_intr_type type)
+{
+ if (type >= MIC_NUM_INTR_TYPES)
+ return MIC_NUM_OFFSETS;
+ if (intr_src >= mdev->intr_info->intr_len[type])
+ return MIC_NUM_OFFSETS;
+
+ return mdev->intr_info->intr_start_idx[type] + intr_src;
+}
+
+/* Return next available msix_entry. */
+static struct msix_entry *mic_get_available_vector(struct mic_device *mdev)
+{
+ int i;
+ struct mic_irq_info *info = &mdev->irq_info;
+
+ for (i = 0; i < info->num_vectors; i++)
+ if (!info->mic_msi_map[i])
+ return &info->msix_entries[i];
+ return NULL;
+}
+
+/**
+ * mic_register_intr_callback - Register a callback handler for the
+ * given source id.
+ *
+ * @mdev: pointer to the mic_device instance
+ * @idx: The source id to be registered.
+ * @func: The function to be called when the source id receives
+ * the interrupt.
+ * @data: Private data of the requester.
+ * Return the callback structure that was registered or an
+ * appropriate error on failure.
+ */
+static struct mic_intr_cb *mic_register_intr_callback(struct mic_device *mdev,
+ u8 idx, irqreturn_t (*func) (int irq, void *dev),
+ void *data)
+{
+ struct mic_intr_cb *intr_cb;
+ unsigned long flags;
+ int rc;
+ intr_cb = kmalloc(sizeof(*intr_cb), GFP_KERNEL);
+
+ if (!intr_cb)
+ return ERR_PTR(-ENOMEM);
+
+ intr_cb->func = func;
+ intr_cb->data = data;
+ intr_cb->cb_id = ida_simple_get(&mdev->irq_info.cb_ida,
+ 0, 0, GFP_KERNEL);
+ if (intr_cb->cb_id < 0) {
+ rc = intr_cb->cb_id;
+ goto ida_fail;
+ }
+
+ spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
+ list_add_tail(&intr_cb->list, &mdev->irq_info.cb_list[idx]);
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+
+ return intr_cb;
+ida_fail:
+ kfree(intr_cb);
+ return ERR_PTR(rc);
+}
+
+/**
+ * mic_unregister_intr_callback - Unregister the callback handler
+ * identified by its callback id.
+ *
+ * @mdev: pointer to the mic_device instance
+ * @idx: The callback structure id to be unregistered.
+ * Return the source id that was unregistered or MIC_NUM_OFFSETS if no
+ * such callback handler was found.
+ */
+static u8 mic_unregister_intr_callback(struct mic_device *mdev, u32 idx)
+{
+ struct list_head *pos, *tmp;
+ struct mic_intr_cb *intr_cb;
+ unsigned long flags;
+ int i;
+
+ for (i = 0; i < MIC_NUM_OFFSETS; i++) {
+ spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
+ list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
+ intr_cb = list_entry(pos, struct mic_intr_cb, list);
+ if (intr_cb->cb_id == idx) {
+ list_del(pos);
+ ida_simple_remove(&mdev->irq_info.cb_ida,
+ intr_cb->cb_id);
+ kfree(intr_cb);
+ spin_unlock_irqrestore(
+ &mdev->irq_info.mic_intr_lock, flags);
+ return i;
+ }
+ }
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+ }
+ return MIC_NUM_OFFSETS;
+}
+
+/**
+ * mic_setup_msix - Initializes MSIx interrupts.
+ *
+ * @mdev: pointer to mic_device instance
+ *
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int mic_setup_msix(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int rc, i;
+ int entry_size = sizeof(*mdev->irq_info.msix_entries);
+
+ mdev->irq_info.msix_entries = kmalloc_array(MIC_MIN_MSIX,
+ entry_size, GFP_KERNEL);
+ if (!mdev->irq_info.msix_entries) {
+ rc = -ENOMEM;
+ goto err_nomem1;
+ }
+
+ for (i = 0; i < MIC_MIN_MSIX; i++)
+ mdev->irq_info.msix_entries[i].entry = i;
+
+ rc = pci_enable_msix(pdev, mdev->irq_info.msix_entries,
+ MIC_MIN_MSIX);
+ if (rc) {
+ dev_dbg(&pdev->dev, "Error enabling MSIx. rc = %d\n", rc);
+ goto err_enable_msix;
+ }
+
+ mdev->irq_info.num_vectors = MIC_MIN_MSIX;
+ mdev->irq_info.mic_msi_map = kzalloc((sizeof(u32) *
+ mdev->irq_info.num_vectors), GFP_KERNEL);
+
+ if (!mdev->irq_info.mic_msi_map) {
+ rc = -ENOMEM;
+ goto err_nomem2;
+ }
+
+ dev_dbg(mdev->sdev->parent,
+ "%d MSIx irqs setup\n", mdev->irq_info.num_vectors);
+ return 0;
+err_nomem2:
+ pci_disable_msix(pdev);
+err_enable_msix:
+ kfree(mdev->irq_info.msix_entries);
+err_nomem1:
+ mdev->irq_info.num_vectors = 0;
+ return rc;
+}
+
+/**
+ * mic_setup_callbacks - Initialize data structures needed
+ * to handle callbacks.
+ *
+ * @mdev: pointer to mic_device instance
+ */
+static int mic_setup_callbacks(struct mic_device *mdev)
+{
+ int i;
+
+ mdev->irq_info.cb_list = kmalloc_array(MIC_NUM_OFFSETS,
+ sizeof(*mdev->irq_info.cb_list),
+ GFP_KERNEL);
+ if (!mdev->irq_info.cb_list)
+ return -ENOMEM;
+
+ for (i = 0; i < MIC_NUM_OFFSETS; i++)
+ INIT_LIST_HEAD(&mdev->irq_info.cb_list[i]);
+ ida_init(&mdev->irq_info.cb_ida);
+ spin_lock_init(&mdev->irq_info.mic_intr_lock);
+ return 0;
+}
+
+/**
+ * mic_release_callbacks - Uninitialize data structures needed
+ * to handle callbacks.
+ *
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_release_callbacks(struct mic_device *mdev)
+{
+ unsigned long flags;
+ struct list_head *pos, *tmp;
+ struct mic_intr_cb *intr_cb;
+ int i;
+
+ for (i = 0; i < MIC_NUM_OFFSETS; i++) {
+ spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
+
+ if (list_empty(&mdev->irq_info.cb_list[i])) {
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock,
+ flags);
+ break;
+ }
+
+ list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
+ intr_cb = list_entry(pos, struct mic_intr_cb, list);
+ list_del(pos);
+ ida_simple_remove(&mdev->irq_info.cb_ida,
+ intr_cb->cb_id);
+ kfree(intr_cb);
+ }
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+ }
+ ida_destroy(&mdev->irq_info.cb_ida);
+ kfree(mdev->irq_info.cb_list);
+}
+
+/**
+ * mic_setup_msi - Initializes MSI interrupts.
+ *
+ * @mdev: pointer to mic_device instance
+ * @pdev: PCI device structure
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int mic_setup_msi(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int rc;
+
+ rc = pci_enable_msi(pdev);
+ if (rc) {
+ dev_dbg(&pdev->dev, "Error enabling MSI. rc = %d\n", rc);
+ return rc;
+ }
+
+ mdev->irq_info.num_vectors = 1;
+ mdev->irq_info.mic_msi_map = kzalloc((sizeof(u32) *
+ mdev->irq_info.num_vectors), GFP_KERNEL);
+
+ if (!mdev->irq_info.mic_msi_map) {
+ rc = -ENOMEM;
+ goto err_nomem1;
+ }
+
+ rc = mic_setup_callbacks(mdev);
+ if (rc) {
+ dev_err(&pdev->dev, "Error setting up callbacks\n");
+ goto err_nomem2;
+ }
+
+ rc = request_irq(pdev->irq, mic_interrupt, 0 , "mic-msi", mdev);
+ if (rc) {
+ dev_err(&pdev->dev, "Error allocating MSI interrupt\n");
+ goto err_irq_req_fail;
+ }
+
+ dev_dbg(&pdev->dev, "%d MSI irqs setup\n", mdev->irq_info.num_vectors);
+ return 0;
+err_irq_req_fail:
+ mic_release_callbacks(mdev);
+err_nomem2:
+ kfree(mdev->irq_info.mic_msi_map);
+err_nomem1:
+ pci_disable_msi(pdev);
+ mdev->irq_info.num_vectors = 0;
+ return rc;
+}
+
+/**
+ * mic_setup_intx - Initializes legacy interrupts.
+ *
+ * @mdev: pointer to mic_device instance
+ * @pdev: PCI device structure
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int mic_setup_intx(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int rc;
+
+ pci_msi_off(pdev);
+
+ /* Enable intx */
+ pci_intx(pdev, 1);
+ rc = mic_setup_callbacks(mdev);
+ if (rc) {
+ dev_err(&pdev->dev, "Error setting up callbacks\n");
+ goto err_nomem;
+ }
+
+ rc = request_irq(pdev->irq, mic_interrupt,
+ IRQF_SHARED, "mic-intx", mdev);
+ if (rc)
+ goto err;
+
+ dev_dbg(&pdev->dev, "intx irq setup\n");
+ return 0;
+err:
+ mic_release_callbacks(mdev);
+err_nomem:
+ return rc;
+}
+
+/**
+ * mic_next_db - Retrieve the next doorbell interrupt source id.
+ * The id is picked sequentially from the available pool of
+ * doorlbell ids.
+ *
+ * @mdev: pointer to the mic_device instance.
+ *
+ * Returns the next doorbell interrupt source.
+ */
+int mic_next_db(struct mic_device *mdev)
+{
+ int next_db;
+
+ next_db = mdev->irq_info.next_avail_src %
+ mdev->intr_info->intr_len[MIC_INTR_DB];
+ mdev->irq_info.next_avail_src++;
+ return next_db;
+}
+
+#define COOKIE_ID_SHIFT 16
+#define GET_ENTRY(cookie) ((cookie) & 0xFFFF)
+#define GET_OFFSET(cookie) ((cookie) >> COOKIE_ID_SHIFT)
+#define MK_COOKIE(x, y) ((x) | (y) << COOKIE_ID_SHIFT)
+
+/**
+ * mic_request_irq - request an irq. mic_mutex needs
+ * to be held before calling this function.
+ *
+ * @mdev: pointer to mic_device instance
+ * @func: The callback function that handles the interrupt.
+ * The function needs to call ack_interrupts
+ * (mdev->ops->ack_interrupt(mdev)) when handling the interrupts.
+ * @name: The ASCII name of the callee requesting the irq.
+ * @data: private data that is returned back when calling the
+ * function handler.
+ * @intr_src: The source id of the requester. Its the doorbell id
+ * for Doorbell interrupts and DMA channel id for DMA interrupts.
+ * @type: The type of interrupt. Values defined in mic_intr_type
+ *
+ * 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_irq(struct mic_device *mdev,
+ irqreturn_t (*func)(int irq, void *dev),
+ const char *name, void *data, int intr_src,
+ enum mic_intr_type type)
+{
+ u16 offset;
+ int rc = 0;
+ struct msix_entry *msix = NULL;
+ unsigned long cookie = 0;
+ u16 entry;
+ struct mic_intr_cb *intr_cb;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+
+ offset = mic_map_src_to_offset(mdev, intr_src, type);
+ if (offset >= MIC_NUM_OFFSETS) {
+ dev_err(mdev->sdev->parent,
+ "Error mapping index %d to a valid source id.\n",
+ intr_src);
+ rc = -EINVAL;
+ goto err;
+ }
+
+ if (mdev->irq_info.num_vectors > 1) {
+ msix = mic_get_available_vector(mdev);
+ if (!msix) {
+ dev_err(mdev->sdev->parent,
+ "No MSIx vectors available for use.\n");
+ rc = -ENOSPC;
+ goto err;
+ }
+
+ rc = request_irq(msix->vector, func, 0, name, data);
+ if (rc) {
+ dev_dbg(mdev->sdev->parent,
+ "request irq failed rc = %d\n", rc);
+ goto err;
+ }
+ entry = msix->entry;
+ mdev->irq_info.mic_msi_map[entry] |= BIT(offset);
+ mdev->intr_ops->program_msi_to_src_map(mdev,
+ entry, offset, true);
+ cookie = MK_COOKIE(entry, offset);
+ dev_dbg(mdev->sdev->parent, "irq: %d assigned for src: %d\n",
+ msix->vector, intr_src);
+ } else {
+ intr_cb = mic_register_intr_callback(mdev,
+ offset, func, data);
+ if (IS_ERR(intr_cb)) {
+ dev_err(mdev->sdev->parent,
+ "No available callback entries for use\n");
+ rc = PTR_ERR(intr_cb);
+ goto err;
+ }
+
+ entry = 0;
+ if (pci_dev_msi_enabled(pdev)) {
+ mdev->irq_info.mic_msi_map[entry] |= (1 << offset);
+ mdev->intr_ops->program_msi_to_src_map(mdev,
+ entry, offset, true);
+ }
+ cookie = MK_COOKIE(entry, intr_cb->cb_id);
+ dev_dbg(mdev->sdev->parent, "callback %d registered for src: %d\n",
+ intr_cb->cb_id, intr_src);
+ }
+ return (struct mic_irq *)cookie;
+err:
+ return ERR_PTR(rc);
+}
+
+/**
+ * mic_free_irq - free irq. mic_mutex
+ * needs to be held before calling this function.
+ *
+ * @mdev: pointer to mic_device instance
+ * @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_irq(struct mic_device *mdev,
+ struct mic_irq *cookie, void *data)
+{
+ u32 offset;
+ u32 entry;
+ u8 src_id;
+ unsigned int irq;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+
+ entry = GET_ENTRY((unsigned long)cookie);
+ offset = GET_OFFSET((unsigned long)cookie);
+ if (mdev->irq_info.num_vectors > 1) {
+ if (entry >= mdev->irq_info.num_vectors) {
+ dev_warn(mdev->sdev->parent,
+ "entry %d should be < num_irq %d\n",
+ entry, mdev->irq_info.num_vectors);
+ return;
+ }
+ irq = mdev->irq_info.msix_entries[entry].vector;
+ free_irq(irq, data);
+ mdev->irq_info.mic_msi_map[entry] &= ~(BIT(offset));
+ mdev->intr_ops->program_msi_to_src_map(mdev,
+ entry, offset, false);
+
+ dev_dbg(mdev->sdev->parent, "irq: %d freed\n", irq);
+ } else {
+ irq = pdev->irq;
+ src_id = mic_unregister_intr_callback(mdev, offset);
+ if (src_id >= MIC_NUM_OFFSETS) {
+ dev_warn(mdev->sdev->parent, "Error unregistering callback\n");
+ return;
+ }
+ if (pci_dev_msi_enabled(pdev)) {
+ mdev->irq_info.mic_msi_map[entry] &= ~(BIT(src_id));
+ mdev->intr_ops->program_msi_to_src_map(mdev,
+ entry, src_id, false);
+ }
+ dev_dbg(mdev->sdev->parent, "callback %d unregistered for src: %d\n",
+ offset, src_id);
+ }
+}
+
+/**
+ * mic_setup_interrupts - Initializes interrupts.
+ *
+ * @mdev: pointer to mic_device instance
+ * @pdev: PCI device structure
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int rc;
+
+ rc = mic_setup_msix(mdev, pdev);
+ if (!rc)
+ goto done;
+
+ rc = mic_setup_msi(mdev, pdev);
+ if (!rc)
+ goto done;
+
+ rc = mic_setup_intx(mdev, pdev);
+ if (rc) {
+ dev_err(mdev->sdev->parent, "no usable interrupts\n");
+ return rc;
+ }
+done:
+ mdev->intr_ops->enable_interrupts(mdev);
+ return 0;
+}
+
+/**
+ * mic_free_interrupts - Frees interrupts setup by mic_setup_interrupts
+ *
+ * @mdev: pointer to mic_device instance
+ * @pdev: PCI device structure
+ *
+ * returns none.
+ */
+void mic_free_interrupts(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int i;
+
+ mdev->intr_ops->disable_interrupts(mdev);
+ if (mdev->irq_info.num_vectors > 1) {
+ for (i = 0; i < mdev->irq_info.num_vectors; i++) {
+ if (mdev->irq_info.mic_msi_map[i])
+ dev_warn(&pdev->dev, "irq %d may still be in use.\n",
+ mdev->irq_info.msix_entries[i].vector);
+ }
+ kfree(mdev->irq_info.mic_msi_map);
+ kfree(mdev->irq_info.msix_entries);
+ pci_disable_msix(pdev);
+ } else {
+ if (pci_dev_msi_enabled(pdev)) {
+ free_irq(pdev->irq, mdev);
+ kfree(mdev->irq_info.mic_msi_map);
+ pci_disable_msi(pdev);
+ } else {
+ free_irq(pdev->irq, mdev);
+ }
+ mic_release_callbacks(mdev);
+ }
+}
+
+/**
+ * mic_intr_restore - Restore MIC interrupt registers.
+ *
+ * @mdev: pointer to mic_device instance.
+ *
+ * Restore the interrupt registers to values previously
+ * stored in the SW data structures. mic_mutex needs to
+ * be held before calling this function.
+ *
+ * returns None.
+ */
+void mic_intr_restore(struct mic_device *mdev)
+{
+ int entry, offset;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+
+ if (!pci_dev_msi_enabled(pdev))
+ return;
+
+ for (entry = 0; entry < mdev->irq_info.num_vectors; entry++) {
+ for (offset = 0; offset < MIC_NUM_OFFSETS; offset++) {
+ if (mdev->irq_info.mic_msi_map[entry] & BIT(offset))
+ mdev->intr_ops->program_msi_to_src_map(mdev,
+ entry, offset, true);
+ }
+ }
+}
diff --git a/drivers/misc/mic/host/mic_intr.h b/drivers/misc/mic/host/mic_intr.h
new file mode 100644
index 000000000000..6091aa97e116
--- /dev/null
+++ b/drivers/misc/mic/host/mic_intr.h
@@ -0,0 +1,137 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef _MIC_INTR_H_
+#define _MIC_INTR_H_
+
+/*
+ * The minimum number of msix vectors required for normal operation.
+ * 3 for virtio network, console and block devices.
+ * 1 for card shutdown notifications.
+ */
+#define MIC_MIN_MSIX 4
+#define MIC_NUM_OFFSETS 32
+
+/**
+ * mic_intr_source - The type of source that will generate
+ * the interrupt.The number of types needs to be in sync with
+ * MIC_NUM_INTR_TYPES
+ *
+ * MIC_INTR_DB: The source is a doorbell
+ * MIC_INTR_DMA: The source is a DMA channel
+ * MIC_INTR_ERR: The source is an error interrupt e.g. SBOX ERR
+ * MIC_NUM_INTR_TYPES: Total number of interrupt sources.
+ */
+enum mic_intr_type {
+ MIC_INTR_DB = 0,
+ MIC_INTR_DMA,
+ MIC_INTR_ERR,
+ MIC_NUM_INTR_TYPES
+};
+
+/**
+ * struct mic_intr_info - Contains h/w specific interrupt sources
+ * information.
+ *
+ * @intr_start_idx: Contains the starting indexes of the
+ * interrupt types.
+ * @intr_len: Contains the length of the interrupt types.
+ */
+struct mic_intr_info {
+ u16 intr_start_idx[MIC_NUM_INTR_TYPES];
+ u16 intr_len[MIC_NUM_INTR_TYPES];
+};
+
+/**
+ * struct mic_irq_info - OS specific irq information
+ *
+ * @next_avail_src: next available doorbell that can be assigned.
+ * @msix_entries: msix entries allocated while setting up MSI-x
+ * @mic_msi_map: The MSI/MSI-x mapping information.
+ * @num_vectors: The number of MSI/MSI-x vectors that have been allocated.
+ * @cb_ida: callback ID allocator to track the callbacks registered.
+ * @mic_intr_lock: spinlock to protect the interrupt callback list.
+ * @cb_list: Array of callback lists one for each source.
+ */
+struct mic_irq_info {
+ int next_avail_src;
+ struct msix_entry *msix_entries;
+ u32 *mic_msi_map;
+ u16 num_vectors;
+ struct ida cb_ida;
+ spinlock_t mic_intr_lock;
+ struct list_head *cb_list;
+};
+
+/**
+ * struct mic_intr_cb - Interrupt callback structure.
+ *
+ * @func: The callback function
+ * @data: Private data of the requester.
+ * @cb_id: The callback id. Identifies this callback.
+ * @list: list head pointing to the next callback structure.
+ */
+struct mic_intr_cb {
+ irqreturn_t (*func) (int irq, void *data);
+ void *data;
+ int cb_id;
+ struct list_head list;
+};
+
+/**
+ * struct mic_irq - opaque pointer used as cookie
+ */
+struct mic_irq;
+
+/* Forward declaration */
+struct mic_device;
+
+/**
+ * struct mic_hw_intr_ops: MIC HW specific interrupt operations
+ * @intr_init: Initialize H/W specific interrupt information.
+ * @enable_interrupts: Enable interrupts from the hardware.
+ * @disable_interrupts: Disable interrupts from the hardware.
+ * @program_msi_to_src_map: Update MSI mapping registers with
+ * irq information.
+ * @read_msi_to_src_map: Read MSI mapping registers containing
+ * irq information.
+ */
+struct mic_hw_intr_ops {
+ void (*intr_init)(struct mic_device *mdev);
+ void (*enable_interrupts)(struct mic_device *mdev);
+ void (*disable_interrupts)(struct mic_device *mdev);
+ void (*program_msi_to_src_map) (struct mic_device *mdev,
+ int idx, int intr_src, bool set);
+ u32 (*read_msi_to_src_map) (struct mic_device *mdev,
+ int idx);
+};
+
+int mic_next_db(struct mic_device *mdev);
+struct mic_irq *mic_request_irq(struct mic_device *mdev,
+ irqreturn_t (*func)(int irq, void *data),
+ const char *name, void *data, int intr_src,
+ enum mic_intr_type type);
+
+void mic_free_irq(struct mic_device *mdev,
+ struct mic_irq *cookie, void *data);
+int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev);
+void mic_free_interrupts(struct mic_device *mdev, struct pci_dev *pdev);
+void mic_intr_restore(struct mic_device *mdev);
+#endif
diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c
new file mode 100644
index 000000000000..ad838c7651c4
--- /dev/null
+++ b/drivers/misc/mic/host/mic_main.c
@@ -0,0 +1,536 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ * Global TODO's across the driver to be added after initial base
+ * patches are accepted upstream:
+ * 1) Enable DMA support.
+ * 2) Enable per vring interrupt support.
+ */
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/suspend.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_x100.h"
+#include "mic_smpt.h"
+#include "mic_fops.h"
+#include "mic_virtio.h"
+
+static const char mic_driver_name[] = "mic";
+
+static DEFINE_PCI_DEVICE_TABLE(mic_pci_tbl) = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},
+
+ /* required last entry */
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, mic_pci_tbl);
+
+/* ID allocator for MIC devices */
+static struct ida g_mic_ida;
+/* Class of MIC devices for sysfs accessibility. */
+static struct class *g_mic_class;
+/* Base device node number for MIC devices */
+static dev_t g_mic_devno;
+
+static const struct file_operations mic_fops = {
+ .open = mic_open,
+ .release = mic_release,
+ .unlocked_ioctl = mic_ioctl,
+ .poll = mic_poll,
+ .mmap = mic_mmap,
+ .owner = THIS_MODULE,
+};
+
+/* Initialize the device page */
+static int mic_dp_init(struct mic_device *mdev)
+{
+ mdev->dp = kzalloc(MIC_DP_SIZE, GFP_KERNEL);
+ if (!mdev->dp) {
+ dev_err(mdev->sdev->parent, "%s %d err %d\n",
+ __func__, __LINE__, -ENOMEM);
+ return -ENOMEM;
+ }
+
+ mdev->dp_dma_addr = mic_map_single(mdev,
+ mdev->dp, MIC_DP_SIZE);
+ if (mic_map_error(mdev->dp_dma_addr)) {
+ kfree(mdev->dp);
+ dev_err(mdev->sdev->parent, "%s %d err %d\n",
+ __func__, __LINE__, -ENOMEM);
+ return -ENOMEM;
+ }
+ mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
+ mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
+ return 0;
+}
+
+/* Uninitialize the device page */
+static void mic_dp_uninit(struct mic_device *mdev)
+{
+ mic_unmap_single(mdev, mdev->dp_dma_addr, MIC_DP_SIZE);
+ kfree(mdev->dp);
+}
+
+/**
+ * mic_shutdown_db - Shutdown doorbell interrupt handler.
+ */
+static irqreturn_t mic_shutdown_db(int irq, void *data)
+{
+ struct mic_device *mdev = data;
+ struct mic_bootparam *bootparam = mdev->dp;
+
+ mdev->ops->ack_interrupt(mdev);
+
+ switch (bootparam->shutdown_status) {
+ case MIC_HALTED:
+ case MIC_POWER_OFF:
+ case MIC_RESTART:
+ /* Fall through */
+ case MIC_CRASHED:
+ schedule_work(&mdev->shutdown_work);
+ break;
+ default:
+ break;
+ };
+ return IRQ_HANDLED;
+}
+
+/**
+ * mic_ops_init: Initialize HW specific operation tables.
+ *
+ * @mdev: pointer to mic_device instance
+ *
+ * returns none.
+ */
+static void mic_ops_init(struct mic_device *mdev)
+{
+ switch (mdev->family) {
+ case MIC_FAMILY_X100:
+ mdev->ops = &mic_x100_ops;
+ mdev->intr_ops = &mic_x100_intr_ops;
+ mdev->smpt_ops = &mic_x100_smpt_ops;
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * mic_get_family - Determine hardware family to which this MIC belongs.
+ *
+ * @pdev: The pci device structure
+ *
+ * returns family.
+ */
+static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
+{
+ enum mic_hw_family family;
+
+ switch (pdev->device) {
+ case MIC_X100_PCI_DEVICE_2250:
+ case MIC_X100_PCI_DEVICE_2251:
+ case MIC_X100_PCI_DEVICE_2252:
+ case MIC_X100_PCI_DEVICE_2253:
+ case MIC_X100_PCI_DEVICE_2254:
+ case MIC_X100_PCI_DEVICE_2255:
+ case MIC_X100_PCI_DEVICE_2256:
+ case MIC_X100_PCI_DEVICE_2257:
+ case MIC_X100_PCI_DEVICE_2258:
+ case MIC_X100_PCI_DEVICE_2259:
+ case MIC_X100_PCI_DEVICE_225a:
+ case MIC_X100_PCI_DEVICE_225b:
+ case MIC_X100_PCI_DEVICE_225c:
+ case MIC_X100_PCI_DEVICE_225d:
+ case MIC_X100_PCI_DEVICE_225e:
+ family = MIC_FAMILY_X100;
+ break;
+ default:
+ family = MIC_FAMILY_UNKNOWN;
+ break;
+ }
+ return family;
+}
+
+/**
+* mic_pm_notifier: Notifier callback function that handles
+* PM notifications.
+*
+* @notifier_block: The notifier structure.
+* @pm_event: The event for which the driver was notified.
+* @unused: Meaningless. Always NULL.
+*
+* returns NOTIFY_DONE
+*/
+static int mic_pm_notifier(struct notifier_block *notifier,
+ unsigned long pm_event, void *unused)
+{
+ struct mic_device *mdev = container_of(notifier,
+ struct mic_device, pm_notifier);
+
+ switch (pm_event) {
+ case PM_HIBERNATION_PREPARE:
+ /* Fall through */
+ case PM_SUSPEND_PREPARE:
+ mic_prepare_suspend(mdev);
+ break;
+ case PM_POST_HIBERNATION:
+ /* Fall through */
+ case PM_POST_SUSPEND:
+ /* Fall through */
+ case PM_POST_RESTORE:
+ mic_complete_resume(mdev);
+ break;
+ case PM_RESTORE_PREPARE:
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+/**
+ * mic_device_init - Allocates and initializes the MIC device structure
+ *
+ * @mdev: pointer to mic_device instance
+ * @pdev: The pci device structure
+ *
+ * returns none.
+ */
+static int
+mic_device_init(struct mic_device *mdev, struct pci_dev *pdev)
+{
+ int rc;
+
+ mdev->family = mic_get_family(pdev);
+ mdev->stepping = pdev->revision;
+ mic_ops_init(mdev);
+ mic_sysfs_init(mdev);
+ mutex_init(&mdev->mic_mutex);
+ mdev->irq_info.next_avail_src = 0;
+ INIT_WORK(&mdev->reset_trigger_work, mic_reset_trigger_work);
+ INIT_WORK(&mdev->shutdown_work, mic_shutdown_work);
+ init_completion(&mdev->reset_wait);
+ INIT_LIST_HEAD(&mdev->vdev_list);
+ mdev->pm_notifier.notifier_call = mic_pm_notifier;
+ rc = register_pm_notifier(&mdev->pm_notifier);
+ if (rc) {
+ dev_err(&pdev->dev, "register_pm_notifier failed rc %d\n",
+ rc);
+ goto register_pm_notifier_fail;
+ }
+ return 0;
+register_pm_notifier_fail:
+ flush_work(&mdev->shutdown_work);
+ flush_work(&mdev->reset_trigger_work);
+ return rc;
+}
+
+/**
+ * mic_device_uninit - Frees resources allocated during mic_device_init(..)
+ *
+ * @mdev: pointer to mic_device instance
+ *
+ * returns none
+ */
+static void mic_device_uninit(struct mic_device *mdev)
+{
+ /* The cmdline sysfs entry might have allocated cmdline */
+ kfree(mdev->cmdline);
+ kfree(mdev->firmware);
+ kfree(mdev->ramdisk);
+ kfree(mdev->bootmode);
+ flush_work(&mdev->reset_trigger_work);
+ flush_work(&mdev->shutdown_work);
+ unregister_pm_notifier(&mdev->pm_notifier);
+}
+
+/**
+ * mic_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device structure
+ * @ent: entry in mic_pci_tbl
+ *
+ * returns 0 on success, < 0 on failure.
+ */
+static int mic_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int rc;
+ struct mic_device *mdev;
+
+ mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+ if (!mdev) {
+ rc = -ENOMEM;
+ dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc);
+ goto mdev_alloc_fail;
+ }
+ mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
+ if (mdev->id < 0) {
+ rc = mdev->id;
+ dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
+ goto ida_fail;
+ }
+
+ rc = mic_device_init(mdev, pdev);
+ if (rc) {
+ dev_err(&pdev->dev, "mic_device_init failed rc %d\n", rc);
+ goto device_init_fail;
+ }
+
+ rc = pci_enable_device(pdev);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to enable pci device.\n");
+ goto uninit_device;
+ }
+
+ pci_set_master(pdev);
+
+ rc = pci_request_regions(pdev, mic_driver_name);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to get pci regions.\n");
+ goto disable_device;
+ }
+
+ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (rc) {
+ dev_err(&pdev->dev, "Cannot set DMA mask\n");
+ goto release_regions;
+ }
+
+ mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
+ mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
+ mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
+ if (!mdev->mmio.va) {
+ dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
+ rc = -EIO;
+ goto release_regions;
+ }
+
+ mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
+ mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
+ mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
+ if (!mdev->aper.va) {
+ dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
+ rc = -EIO;
+ goto unmap_mmio;
+ }
+
+ mdev->intr_ops->intr_init(mdev);
+ rc = mic_setup_interrupts(mdev, pdev);
+ if (rc) {
+ dev_err(&pdev->dev, "mic_setup_interrupts failed %d\n", rc);
+ goto unmap_aper;
+ }
+ rc = mic_smpt_init(mdev);
+ if (rc) {
+ dev_err(&pdev->dev, "smpt_init failed %d\n", rc);
+ goto free_interrupts;
+ }
+
+ pci_set_drvdata(pdev, mdev);
+
+ mdev->sdev = device_create_with_groups(g_mic_class, &pdev->dev,
+ MKDEV(MAJOR(g_mic_devno), mdev->id), NULL,
+ mdev->attr_group, "mic%d", mdev->id);
+ if (IS_ERR(mdev->sdev)) {
+ rc = PTR_ERR(mdev->sdev);
+ dev_err(&pdev->dev,
+ "device_create_with_groups failed rc %d\n", rc);
+ goto smpt_uninit;
+ }
+ mdev->state_sysfs = sysfs_get_dirent(mdev->sdev->kobj.sd, "state");
+ if (!mdev->state_sysfs) {
+ rc = -ENODEV;
+ dev_err(&pdev->dev, "sysfs_get_dirent failed rc %d\n", rc);
+ goto destroy_device;
+ }
+
+ rc = mic_dp_init(mdev);
+ if (rc) {
+ dev_err(&pdev->dev, "mic_dp_init failed rc %d\n", rc);
+ goto sysfs_put;
+ }
+ mutex_lock(&mdev->mic_mutex);
+
+ mdev->shutdown_db = mic_next_db(mdev);
+ mdev->shutdown_cookie = mic_request_irq(mdev, mic_shutdown_db,
+ "shutdown-interrupt", mdev, mdev->shutdown_db, MIC_INTR_DB);
+ if (IS_ERR(mdev->shutdown_cookie)) {
+ rc = PTR_ERR(mdev->shutdown_cookie);
+ mutex_unlock(&mdev->mic_mutex);
+ goto dp_uninit;
+ }
+ mutex_unlock(&mdev->mic_mutex);
+ mic_bootparam_init(mdev);
+
+ mic_create_debug_dir(mdev);
+ cdev_init(&mdev->cdev, &mic_fops);
+ mdev->cdev.owner = THIS_MODULE;
+ rc = cdev_add(&mdev->cdev, MKDEV(MAJOR(g_mic_devno), mdev->id), 1);
+ if (rc) {
+ dev_err(&pdev->dev, "cdev_add err id %d rc %d\n", mdev->id, rc);
+ goto cleanup_debug_dir;
+ }
+ return 0;
+cleanup_debug_dir:
+ mic_delete_debug_dir(mdev);
+ mutex_lock(&mdev->mic_mutex);
+ mic_free_irq(mdev, mdev->shutdown_cookie, mdev);
+ mutex_unlock(&mdev->mic_mutex);
+dp_uninit:
+ mic_dp_uninit(mdev);
+sysfs_put:
+ sysfs_put(mdev->state_sysfs);
+destroy_device:
+ device_destroy(g_mic_class, MKDEV(MAJOR(g_mic_devno), mdev->id));
+smpt_uninit:
+ mic_smpt_uninit(mdev);
+free_interrupts:
+ mic_free_interrupts(mdev, pdev);
+unmap_aper:
+ iounmap(mdev->aper.va);
+unmap_mmio:
+ iounmap(mdev->mmio.va);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+uninit_device:
+ mic_device_uninit(mdev);
+device_init_fail:
+ ida_simple_remove(&g_mic_ida, mdev->id);
+ida_fail:
+ kfree(mdev);
+mdev_alloc_fail:
+ dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
+ return rc;
+}
+
+/**
+ * mic_remove - Device Removal Routine
+ * mic_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ *
+ * @pdev: PCI device structure
+ */
+static void mic_remove(struct pci_dev *pdev)
+{
+ struct mic_device *mdev;
+
+ mdev = pci_get_drvdata(pdev);
+ if (!mdev)
+ return;
+
+ mic_stop(mdev, false);
+ cdev_del(&mdev->cdev);
+ mic_delete_debug_dir(mdev);
+ mutex_lock(&mdev->mic_mutex);
+ mic_free_irq(mdev, mdev->shutdown_cookie, mdev);
+ mutex_unlock(&mdev->mic_mutex);
+ flush_work(&mdev->shutdown_work);
+ mic_dp_uninit(mdev);
+ sysfs_put(mdev->state_sysfs);
+ device_destroy(g_mic_class, MKDEV(MAJOR(g_mic_devno), mdev->id));
+ mic_smpt_uninit(mdev);
+ mic_free_interrupts(mdev, pdev);
+ iounmap(mdev->mmio.va);
+ iounmap(mdev->aper.va);
+ mic_device_uninit(mdev);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ ida_simple_remove(&g_mic_ida, mdev->id);
+ kfree(mdev);
+}
+static struct pci_driver mic_driver = {
+ .name = mic_driver_name,
+ .id_table = mic_pci_tbl,
+ .probe = mic_probe,
+ .remove = mic_remove
+};
+
+static int __init mic_init(void)
+{
+ int ret;
+
+ ret = alloc_chrdev_region(&g_mic_devno, 0,
+ MIC_MAX_NUM_DEVS, mic_driver_name);
+ if (ret) {
+ pr_err("alloc_chrdev_region failed ret %d\n", ret);
+ goto error;
+ }
+
+ g_mic_class = class_create(THIS_MODULE, mic_driver_name);
+ if (IS_ERR(g_mic_class)) {
+ ret = PTR_ERR(g_mic_class);
+ pr_err("class_create failed ret %d\n", ret);
+ goto cleanup_chrdev;
+ }
+
+ mic_init_debugfs();
+ ida_init(&g_mic_ida);
+ ret = pci_register_driver(&mic_driver);
+ if (ret) {
+ pr_err("pci_register_driver failed ret %d\n", ret);
+ goto cleanup_debugfs;
+ }
+ return ret;
+cleanup_debugfs:
+ mic_exit_debugfs();
+ class_destroy(g_mic_class);
+cleanup_chrdev:
+ unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
+error:
+ return ret;
+}
+
+static void __exit mic_exit(void)
+{
+ pci_unregister_driver(&mic_driver);
+ ida_destroy(&g_mic_ida);
+ mic_exit_debugfs();
+ class_destroy(g_mic_class);
+ unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
+}
+
+module_init(mic_init);
+module_exit(mic_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/host/mic_smpt.c b/drivers/misc/mic/host/mic_smpt.c
new file mode 100644
index 000000000000..fae474c4899e
--- /dev/null
+++ b/drivers/misc/mic/host/mic_smpt.c
@@ -0,0 +1,442 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/pci.h>
+
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_smpt.h"
+
+static inline u64 mic_system_page_mask(struct mic_device *mdev)
+{
+ return (1ULL << mdev->smpt->info.page_shift) - 1ULL;
+}
+
+static inline u8 mic_sys_addr_to_smpt(struct mic_device *mdev, dma_addr_t pa)
+{
+ return (pa - mdev->smpt->info.base) >> mdev->smpt->info.page_shift;
+}
+
+static inline u64 mic_smpt_to_pa(struct mic_device *mdev, u8 index)
+{
+ return mdev->smpt->info.base + (index * mdev->smpt->info.page_size);
+}
+
+static inline u64 mic_smpt_offset(struct mic_device *mdev, dma_addr_t pa)
+{
+ return pa & mic_system_page_mask(mdev);
+}
+
+static inline u64 mic_smpt_align_low(struct mic_device *mdev, dma_addr_t pa)
+{
+ return ALIGN(pa - mic_system_page_mask(mdev),
+ mdev->smpt->info.page_size);
+}
+
+static inline u64 mic_smpt_align_high(struct mic_device *mdev, dma_addr_t pa)
+{
+ return ALIGN(pa, mdev->smpt->info.page_size);
+}
+
+/* Total Cumulative system memory accessible by MIC across all SMPT entries */
+static inline u64 mic_max_system_memory(struct mic_device *mdev)
+{
+ return mdev->smpt->info.num_reg * mdev->smpt->info.page_size;
+}
+
+/* Maximum system memory address accessible by MIC */
+static inline u64 mic_max_system_addr(struct mic_device *mdev)
+{
+ return mdev->smpt->info.base + mic_max_system_memory(mdev) - 1ULL;
+}
+
+/* Check if the DMA address is a MIC system memory address */
+static inline bool
+mic_is_system_addr(struct mic_device *mdev, dma_addr_t pa)
+{
+ return pa >= mdev->smpt->info.base && pa <= mic_max_system_addr(mdev);
+}
+
+/* Populate an SMPT entry and update the reference counts. */
+static void mic_add_smpt_entry(int spt, s64 *ref, u64 addr,
+ int entries, struct mic_device *mdev)
+{
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+ int i;
+
+ for (i = spt; i < spt + entries; i++,
+ addr += smpt_info->info.page_size) {
+ if (!smpt_info->entry[i].ref_count &&
+ (smpt_info->entry[i].dma_addr != addr)) {
+ mdev->smpt_ops->set(mdev, addr, i);
+ smpt_info->entry[i].dma_addr = addr;
+ }
+ smpt_info->entry[i].ref_count += ref[i - spt];
+ }
+}
+
+/*
+ * Find an available MIC address in MIC SMPT address space
+ * for a given DMA address and size.
+ */
+static dma_addr_t mic_smpt_op(struct mic_device *mdev, u64 dma_addr,
+ int entries, s64 *ref, size_t size)
+{
+ int spt;
+ int ae = 0;
+ int i;
+ unsigned long flags;
+ dma_addr_t mic_addr = 0;
+ dma_addr_t addr = dma_addr;
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+
+ spin_lock_irqsave(&smpt_info->smpt_lock, flags);
+
+ /* find existing entries */
+ for (i = 0; i < smpt_info->info.num_reg; i++) {
+ if (smpt_info->entry[i].dma_addr == addr) {
+ ae++;
+ addr += smpt_info->info.page_size;
+ } else if (ae) /* cannot find contiguous entries */
+ goto not_found;
+
+ if (ae == entries)
+ goto found;
+ }
+
+ /* find free entry */
+ for (ae = 0, i = 0; i < smpt_info->info.num_reg; i++) {
+ ae = (smpt_info->entry[i].ref_count == 0) ? ae + 1 : 0;
+ if (ae == entries)
+ goto found;
+ }
+
+not_found:
+ spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
+ return mic_addr;
+
+found:
+ spt = i - entries + 1;
+ mic_addr = mic_smpt_to_pa(mdev, spt);
+ mic_add_smpt_entry(spt, ref, dma_addr, entries, mdev);
+ smpt_info->map_count++;
+ smpt_info->ref_count += (s64)size;
+ spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
+ return mic_addr;
+}
+
+/*
+ * Returns number of smpt entries needed for dma_addr to dma_addr + size
+ * also returns the reference count array for each of those entries
+ * and the starting smpt address
+ */
+static int mic_get_smpt_ref_count(struct mic_device *mdev, dma_addr_t dma_addr,
+ size_t size, s64 *ref, u64 *smpt_start)
+{
+ u64 start = dma_addr;
+ u64 end = dma_addr + size;
+ int i = 0;
+
+ while (start < end) {
+ ref[i++] = min(mic_smpt_align_high(mdev, start + 1),
+ end) - start;
+ start = mic_smpt_align_high(mdev, start + 1);
+ }
+
+ if (smpt_start)
+ *smpt_start = mic_smpt_align_low(mdev, dma_addr);
+
+ return i;
+}
+
+/*
+ * mic_to_dma_addr - Converts a MIC address to a DMA address.
+ *
+ * @mdev: pointer to mic_device instance.
+ * @mic_addr: MIC address.
+ *
+ * returns a DMA address.
+ */
+static dma_addr_t
+mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr)
+{
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+ int spt;
+ dma_addr_t dma_addr;
+
+ if (!mic_is_system_addr(mdev, mic_addr)) {
+ dev_err(mdev->sdev->parent,
+ "mic_addr is invalid. mic_addr = 0x%llx\n", mic_addr);
+ return -EINVAL;
+ }
+ spt = mic_sys_addr_to_smpt(mdev, mic_addr);
+ dma_addr = smpt_info->entry[spt].dma_addr +
+ mic_smpt_offset(mdev, mic_addr);
+ return dma_addr;
+}
+
+/**
+ * mic_map - Maps a DMA address to a MIC physical address.
+ *
+ * @mdev: pointer to mic_device instance.
+ * @dma_addr: DMA address.
+ * @size: Size of the region to be mapped.
+ *
+ * This API converts the DMA address provided to a DMA address understood
+ * by MIC. Caller should check for errors by calling mic_map_error(..).
+ *
+ * returns DMA address as required by MIC.
+ */
+dma_addr_t mic_map(struct mic_device *mdev, dma_addr_t dma_addr, size_t size)
+{
+ dma_addr_t mic_addr = 0;
+ int num_entries;
+ s64 *ref;
+ u64 smpt_start;
+
+ if (!size || size > mic_max_system_memory(mdev))
+ return mic_addr;
+
+ ref = kmalloc(mdev->smpt->info.num_reg * sizeof(s64), GFP_KERNEL);
+ if (!ref)
+ return mic_addr;
+
+ num_entries = mic_get_smpt_ref_count(mdev, dma_addr, size,
+ ref, &smpt_start);
+
+ /* Set the smpt table appropriately and get 16G aligned mic address */
+ mic_addr = mic_smpt_op(mdev, smpt_start, num_entries, ref, size);
+
+ kfree(ref);
+
+ /*
+ * If mic_addr is zero then its an error case
+ * since mic_addr can never be zero.
+ * else generate mic_addr by adding the 16G offset in dma_addr
+ */
+ if (!mic_addr && MIC_FAMILY_X100 == mdev->family) {
+ dev_err(mdev->sdev->parent,
+ "mic_map failed dma_addr 0x%llx size 0x%lx\n",
+ dma_addr, size);
+ return mic_addr;
+ } else {
+ return mic_addr + mic_smpt_offset(mdev, dma_addr);
+ }
+}
+
+/**
+ * mic_unmap - Unmaps a MIC physical address.
+ *
+ * @mdev: pointer to mic_device instance.
+ * @mic_addr: MIC physical address.
+ * @size: Size of the region to be unmapped.
+ *
+ * This API unmaps the mappings created by mic_map(..).
+ *
+ * returns None.
+ */
+void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size)
+{
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+ s64 *ref;
+ int num_smpt;
+ int spt;
+ int i;
+ unsigned long flags;
+
+ if (!size)
+ return;
+
+ if (!mic_is_system_addr(mdev, mic_addr)) {
+ dev_err(mdev->sdev->parent,
+ "invalid address: 0x%llx\n", mic_addr);
+ return;
+ }
+
+ spt = mic_sys_addr_to_smpt(mdev, mic_addr);
+ ref = kmalloc(mdev->smpt->info.num_reg * sizeof(s64), GFP_KERNEL);
+ if (!ref)
+ return;
+
+ /* Get number of smpt entries to be mapped, ref count array */
+ num_smpt = mic_get_smpt_ref_count(mdev, mic_addr, size, ref, NULL);
+
+ spin_lock_irqsave(&smpt_info->smpt_lock, flags);
+ smpt_info->unmap_count++;
+ smpt_info->ref_count -= (s64)size;
+
+ for (i = spt; i < spt + num_smpt; i++) {
+ smpt_info->entry[i].ref_count -= ref[i - spt];
+ if (smpt_info->entry[i].ref_count < 0)
+ dev_warn(mdev->sdev->parent,
+ "ref count for entry %d is negative\n", i);
+ }
+ spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
+ kfree(ref);
+}
+
+/**
+ * mic_map_single - Maps a virtual address to a MIC physical address.
+ *
+ * @mdev: pointer to mic_device instance.
+ * @va: Kernel direct mapped virtual address.
+ * @size: Size of the region to be mapped.
+ *
+ * This API calls pci_map_single(..) for the direct mapped virtual address
+ * and then converts the DMA address provided to a DMA address understood
+ * by MIC. Caller should check for errors by calling mic_map_error(..).
+ *
+ * returns DMA address as required by MIC.
+ */
+dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size)
+{
+ dma_addr_t mic_addr = 0;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+ dma_addr_t dma_addr =
+ pci_map_single(pdev, va, size, PCI_DMA_BIDIRECTIONAL);
+
+ if (!pci_dma_mapping_error(pdev, dma_addr)) {
+ mic_addr = mic_map(mdev, dma_addr, size);
+ if (!mic_addr) {
+ dev_err(mdev->sdev->parent,
+ "mic_map failed dma_addr 0x%llx size 0x%lx\n",
+ dma_addr, size);
+ pci_unmap_single(pdev, dma_addr,
+ size, PCI_DMA_BIDIRECTIONAL);
+ }
+ }
+ return mic_addr;
+}
+
+/**
+ * mic_unmap_single - Unmaps a MIC physical address.
+ *
+ * @mdev: pointer to mic_device instance.
+ * @mic_addr: MIC physical address.
+ * @size: Size of the region to be unmapped.
+ *
+ * This API unmaps the mappings created by mic_map_single(..).
+ *
+ * returns None.
+ */
+void
+mic_unmap_single(struct mic_device *mdev, dma_addr_t mic_addr, size_t size)
+{
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
+ dma_addr_t dma_addr = mic_to_dma_addr(mdev, mic_addr);
+ mic_unmap(mdev, mic_addr, size);
+ pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
+}
+
+/**
+ * mic_smpt_init - Initialize MIC System Memory Page Tables.
+ *
+ * @mdev: pointer to mic_device instance.
+ *
+ * returns 0 for success and -errno for error.
+ */
+int mic_smpt_init(struct mic_device *mdev)
+{
+ int i, err = 0;
+ dma_addr_t dma_addr;
+ struct mic_smpt_info *smpt_info;
+
+ mdev->smpt = kmalloc(sizeof(*mdev->smpt), GFP_KERNEL);
+ if (!mdev->smpt)
+ return -ENOMEM;
+
+ smpt_info = mdev->smpt;
+ mdev->smpt_ops->init(mdev);
+ smpt_info->entry = kmalloc_array(smpt_info->info.num_reg,
+ sizeof(*smpt_info->entry), GFP_KERNEL);
+ if (!smpt_info->entry) {
+ err = -ENOMEM;
+ goto free_smpt;
+ }
+ spin_lock_init(&smpt_info->smpt_lock);
+ for (i = 0; i < smpt_info->info.num_reg; i++) {
+ dma_addr = i * smpt_info->info.page_size;
+ smpt_info->entry[i].dma_addr = dma_addr;
+ smpt_info->entry[i].ref_count = 0;
+ mdev->smpt_ops->set(mdev, dma_addr, i);
+ }
+ smpt_info->ref_count = 0;
+ smpt_info->map_count = 0;
+ smpt_info->unmap_count = 0;
+ return 0;
+free_smpt:
+ kfree(smpt_info);
+ return err;
+}
+
+/**
+ * mic_smpt_uninit - UnInitialize MIC System Memory Page Tables.
+ *
+ * @mdev: pointer to mic_device instance.
+ *
+ * returns None.
+ */
+void mic_smpt_uninit(struct mic_device *mdev)
+{
+ struct mic_smpt_info *smpt_info = mdev->smpt;
+ int i;
+
+ dev_dbg(mdev->sdev->parent,
+ "nodeid %d SMPT ref count %lld map %lld unmap %lld\n",
+ mdev->id, smpt_info->ref_count,
+ smpt_info->map_count, smpt_info->unmap_count);
+
+ for (i = 0; i < smpt_info->info.num_reg; i++) {
+ dev_dbg(mdev->sdev->parent,
+ "SMPT entry[%d] dma_addr = 0x%llx ref_count = %lld\n",
+ i, smpt_info->entry[i].dma_addr,
+ smpt_info->entry[i].ref_count);
+ if (smpt_info->entry[i].ref_count)
+ dev_warn(mdev->sdev->parent,
+ "ref count for entry %d is not zero\n", i);
+ }
+ kfree(smpt_info->entry);
+ kfree(smpt_info);
+}
+
+/**
+ * mic_smpt_restore - Restore MIC System Memory Page Tables.
+ *
+ * @mdev: pointer to mic_device instance.
+ *
+ * Restore the SMPT registers to values previously stored in the
+ * SW data structures. Some MIC steppings lose register state
+ * across resets and this API should be called for performing
+ * a restore operation if required.
+ *
+ * returns None.
+ */
+void mic_smpt_restore(struct mic_device *mdev)
+{
+ int i;
+ dma_addr_t dma_addr;
+
+ for (i = 0; i < mdev->smpt->info.num_reg; i++) {
+ dma_addr = mdev->smpt->entry[i].dma_addr;
+ mdev->smpt_ops->set(mdev, dma_addr, i);
+ }
+}
diff --git a/drivers/misc/mic/host/mic_smpt.h b/drivers/misc/mic/host/mic_smpt.h
new file mode 100644
index 000000000000..51970abfe7df
--- /dev/null
+++ b/drivers/misc/mic/host/mic_smpt.h
@@ -0,0 +1,98 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef MIC_SMPT_H
+#define MIC_SMPT_H
+/**
+ * struct mic_smpt_ops - MIC HW specific SMPT operations.
+ * @init: Initialize hardware specific SMPT information in mic_smpt_hw_info.
+ * @set: Set the value for a particular SMPT entry.
+ */
+struct mic_smpt_ops {
+ void (*init)(struct mic_device *mdev);
+ void (*set)(struct mic_device *mdev, dma_addr_t dma_addr, u8 index);
+};
+
+/**
+ * struct mic_smpt - MIC SMPT entry information.
+ * @dma_addr: Base DMA address for this SMPT entry.
+ * @ref_count: Number of active mappings for this SMPT entry in bytes.
+ */
+struct mic_smpt {
+ dma_addr_t dma_addr;
+ s64 ref_count;
+};
+
+/**
+ * struct mic_smpt_hw_info - MIC SMPT hardware specific information.
+ * @num_reg: Number of SMPT registers.
+ * @page_shift: System memory page shift.
+ * @page_size: System memory page size.
+ * @base: System address base.
+ */
+struct mic_smpt_hw_info {
+ u8 num_reg;
+ u8 page_shift;
+ u64 page_size;
+ u64 base;
+};
+
+/**
+ * struct mic_smpt_info - MIC SMPT information.
+ * @entry: Array of SMPT entries.
+ * @smpt_lock: Spin lock protecting access to SMPT data structures.
+ * @info: Hardware specific SMPT information.
+ * @ref_count: Number of active SMPT mappings (for debug).
+ * @map_count: Number of SMPT mappings created (for debug).
+ * @unmap_count: Number of SMPT mappings destroyed (for debug).
+ */
+struct mic_smpt_info {
+ struct mic_smpt *entry;
+ spinlock_t smpt_lock;
+ struct mic_smpt_hw_info info;
+ s64 ref_count;
+ s64 map_count;
+ s64 unmap_count;
+};
+
+dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size);
+void mic_unmap_single(struct mic_device *mdev,
+ dma_addr_t mic_addr, size_t size);
+dma_addr_t mic_map(struct mic_device *mdev,
+ dma_addr_t dma_addr, size_t size);
+void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size);
+
+/**
+ * mic_map_error - Check a MIC address for errors.
+ *
+ * @mdev: pointer to mic_device instance.
+ *
+ * returns Whether there was an error during mic_map..(..) APIs.
+ */
+static inline bool mic_map_error(dma_addr_t mic_addr)
+{
+ return !mic_addr;
+}
+
+int mic_smpt_init(struct mic_device *mdev);
+void mic_smpt_uninit(struct mic_device *mdev);
+void mic_smpt_restore(struct mic_device *mdev);
+
+#endif
diff --git a/drivers/misc/mic/host/mic_sysfs.c b/drivers/misc/mic/host/mic_sysfs.c
new file mode 100644
index 000000000000..6dd864e4a617
--- /dev/null
+++ b/drivers/misc/mic/host/mic_sysfs.c
@@ -0,0 +1,459 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/pci.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+
+/*
+ * A state-to-string lookup table, for exposing a human readable state
+ * via sysfs. Always keep in sync with enum mic_states
+ */
+static const char * const mic_state_string[] = {
+ [MIC_OFFLINE] = "offline",
+ [MIC_ONLINE] = "online",
+ [MIC_SHUTTING_DOWN] = "shutting_down",
+ [MIC_RESET_FAILED] = "reset_failed",
+ [MIC_SUSPENDING] = "suspending",
+ [MIC_SUSPENDED] = "suspended",
+};
+
+/*
+ * A shutdown-status-to-string lookup table, for exposing a human
+ * readable state via sysfs. Always keep in sync with enum mic_shutdown_status
+ */
+static const char * const mic_shutdown_status_string[] = {
+ [MIC_NOP] = "nop",
+ [MIC_CRASHED] = "crashed",
+ [MIC_HALTED] = "halted",
+ [MIC_POWER_OFF] = "poweroff",
+ [MIC_RESTART] = "restart",
+};
+
+void mic_set_shutdown_status(struct mic_device *mdev, u8 shutdown_status)
+{
+ dev_dbg(mdev->sdev->parent, "Shutdown Status %s -> %s\n",
+ mic_shutdown_status_string[mdev->shutdown_status],
+ mic_shutdown_status_string[shutdown_status]);
+ mdev->shutdown_status = shutdown_status;
+}
+
+void mic_set_state(struct mic_device *mdev, u8 state)
+{
+ dev_dbg(mdev->sdev->parent, "State %s -> %s\n",
+ mic_state_string[mdev->state],
+ mic_state_string[state]);
+ mdev->state = state;
+ sysfs_notify_dirent(mdev->state_sysfs);
+}
+
+static ssize_t
+family_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ static const char x100[] = "x100";
+ static const char unknown[] = "Unknown";
+ const char *card = NULL;
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ switch (mdev->family) {
+ case MIC_FAMILY_X100:
+ card = x100;
+ break;
+ default:
+ card = unknown;
+ break;
+ }
+ return scnprintf(buf, PAGE_SIZE, "%s\n", card);
+}
+static DEVICE_ATTR_RO(family);
+
+static ssize_t
+stepping_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ char *string = "??";
+
+ if (!mdev)
+ return -EINVAL;
+
+ switch (mdev->stepping) {
+ case MIC_A0_STEP:
+ string = "A0";
+ break;
+ case MIC_B0_STEP:
+ string = "B0";
+ break;
+ case MIC_B1_STEP:
+ string = "B1";
+ break;
+ case MIC_C0_STEP:
+ string = "C0";
+ break;
+ default:
+ break;
+ }
+ return scnprintf(buf, PAGE_SIZE, "%s\n", string);
+}
+static DEVICE_ATTR_RO(stepping);
+
+static ssize_t
+state_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev || mdev->state >= MIC_LAST)
+ return -EINVAL;
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n",
+ mic_state_string[mdev->state]);
+}
+
+static ssize_t
+state_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc = 0;
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ if (!mdev)
+ return -EINVAL;
+ if (sysfs_streq(buf, "boot")) {
+ rc = mic_start(mdev, buf);
+ if (rc) {
+ dev_err(mdev->sdev->parent,
+ "mic_boot failed rc %d\n", rc);
+ count = rc;
+ }
+ goto done;
+ }
+
+ if (sysfs_streq(buf, "reset")) {
+ schedule_work(&mdev->reset_trigger_work);
+ goto done;
+ }
+
+ if (sysfs_streq(buf, "shutdown")) {
+ mic_shutdown(mdev);
+ goto done;
+ }
+
+ if (sysfs_streq(buf, "suspend")) {
+ mic_suspend(mdev);
+ goto done;
+ }
+
+ count = -EINVAL;
+done:
+ return count;
+}
+static DEVICE_ATTR_RW(state);
+
+static ssize_t shutdown_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev || mdev->shutdown_status >= MIC_STATUS_LAST)
+ return -EINVAL;
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n",
+ mic_shutdown_status_string[mdev->shutdown_status]);
+}
+static DEVICE_ATTR_RO(shutdown_status);
+
+static ssize_t
+cmdline_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ char *cmdline;
+
+ if (!mdev)
+ return -EINVAL;
+
+ cmdline = mdev->cmdline;
+
+ if (cmdline)
+ return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
+ return 0;
+}
+
+static ssize_t
+cmdline_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ mutex_lock(&mdev->mic_mutex);
+ kfree(mdev->cmdline);
+
+ mdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
+ if (!mdev->cmdline) {
+ count = -ENOMEM;
+ goto unlock;
+ }
+
+ strncpy(mdev->cmdline, buf, count);
+
+ if (mdev->cmdline[count - 1] == '\n')
+ mdev->cmdline[count - 1] = '\0';
+ else
+ mdev->cmdline[count] = '\0';
+unlock:
+ mutex_unlock(&mdev->mic_mutex);
+ return count;
+}
+static DEVICE_ATTR_RW(cmdline);
+
+static ssize_t
+firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ char *firmware;
+
+ if (!mdev)
+ return -EINVAL;
+
+ firmware = mdev->firmware;
+
+ if (firmware)
+ return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
+ return 0;
+}
+
+static ssize_t
+firmware_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ mutex_lock(&mdev->mic_mutex);
+ kfree(mdev->firmware);
+
+ mdev->firmware = kmalloc(count + 1, GFP_KERNEL);
+ if (!mdev->firmware) {
+ count = -ENOMEM;
+ goto unlock;
+ }
+ strncpy(mdev->firmware, buf, count);
+
+ if (mdev->firmware[count - 1] == '\n')
+ mdev->firmware[count - 1] = '\0';
+ else
+ mdev->firmware[count] = '\0';
+unlock:
+ mutex_unlock(&mdev->mic_mutex);
+ return count;
+}
+static DEVICE_ATTR_RW(firmware);
+
+static ssize_t
+ramdisk_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ char *ramdisk;
+
+ if (!mdev)
+ return -EINVAL;
+
+ ramdisk = mdev->ramdisk;
+
+ if (ramdisk)
+ return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
+ return 0;
+}
+
+static ssize_t
+ramdisk_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ mutex_lock(&mdev->mic_mutex);
+ kfree(mdev->ramdisk);
+
+ mdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
+ if (!mdev->ramdisk) {
+ count = -ENOMEM;
+ goto unlock;
+ }
+
+ strncpy(mdev->ramdisk, buf, count);
+
+ if (mdev->ramdisk[count - 1] == '\n')
+ mdev->ramdisk[count - 1] = '\0';
+ else
+ mdev->ramdisk[count] = '\0';
+unlock:
+ mutex_unlock(&mdev->mic_mutex);
+ return count;
+}
+static DEVICE_ATTR_RW(ramdisk);
+
+static ssize_t
+bootmode_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ char *bootmode;
+
+ if (!mdev)
+ return -EINVAL;
+
+ bootmode = mdev->bootmode;
+
+ if (bootmode)
+ return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
+ return 0;
+}
+
+static ssize_t
+bootmode_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "elf"))
+ return -EINVAL;
+
+ mutex_lock(&mdev->mic_mutex);
+ kfree(mdev->bootmode);
+
+ mdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
+ if (!mdev->bootmode) {
+ count = -ENOMEM;
+ goto unlock;
+ }
+
+ strncpy(mdev->bootmode, buf, count);
+
+ if (mdev->bootmode[count - 1] == '\n')
+ mdev->bootmode[count - 1] = '\0';
+ else
+ mdev->bootmode[count] = '\0';
+unlock:
+ mutex_unlock(&mdev->mic_mutex);
+ return count;
+}
+static DEVICE_ATTR_RW(bootmode);
+
+static ssize_t
+log_buf_addr_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_addr);
+}
+
+static ssize_t
+log_buf_addr_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ int ret;
+ unsigned long addr;
+
+ if (!mdev)
+ return -EINVAL;
+
+ ret = kstrtoul(buf, 16, &addr);
+ if (ret)
+ goto exit;
+
+ mdev->log_buf_addr = (void *)addr;
+ ret = count;
+exit:
+ return ret;
+}
+static DEVICE_ATTR_RW(log_buf_addr);
+
+static ssize_t
+log_buf_len_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ if (!mdev)
+ return -EINVAL;
+
+ return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_len);
+}
+
+static ssize_t
+log_buf_len_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ int ret;
+ unsigned long addr;
+
+ if (!mdev)
+ return -EINVAL;
+
+ ret = kstrtoul(buf, 16, &addr);
+ if (ret)
+ goto exit;
+
+ mdev->log_buf_len = (int *)addr;
+ ret = count;
+exit:
+ return ret;
+}
+static DEVICE_ATTR_RW(log_buf_len);
+
+static struct attribute *mic_default_attrs[] = {
+ &dev_attr_family.attr,
+ &dev_attr_stepping.attr,
+ &dev_attr_state.attr,
+ &dev_attr_shutdown_status.attr,
+ &dev_attr_cmdline.attr,
+ &dev_attr_firmware.attr,
+ &dev_attr_ramdisk.attr,
+ &dev_attr_bootmode.attr,
+ &dev_attr_log_buf_addr.attr,
+ &dev_attr_log_buf_len.attr,
+
+ NULL
+};
+
+ATTRIBUTE_GROUPS(mic_default);
+
+void mic_sysfs_init(struct mic_device *mdev)
+{
+ mdev->attr_group = mic_default_groups;
+}
diff --git a/drivers/misc/mic/host/mic_virtio.c b/drivers/misc/mic/host/mic_virtio.c
new file mode 100644
index 000000000000..5b8494bd1e00
--- /dev/null
+++ b/drivers/misc/mic/host/mic_virtio.c
@@ -0,0 +1,700 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+
+#include <linux/mic_common.h>
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_smpt.h"
+#include "mic_virtio.h"
+
+/*
+ * Initiates the copies across the PCIe bus from card memory to
+ * a user space buffer.
+ */
+static int mic_virtio_copy_to_user(struct mic_vdev *mvdev,
+ void __user *ubuf, size_t len, u64 addr)
+{
+ int err;
+ void __iomem *dbuf = mvdev->mdev->aper.va + addr;
+ /*
+ * We are copying from IO below an should ideally use something
+ * like copy_to_user_fromio(..) if it existed.
+ */
+ if (copy_to_user(ubuf, dbuf, len)) {
+ err = -EFAULT;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, err);
+ goto err;
+ }
+ mvdev->in_bytes += len;
+ err = 0;
+err:
+ return err;
+}
+
+/*
+ * Initiates copies across the PCIe bus from a user space
+ * buffer to card memory.
+ */
+static int mic_virtio_copy_from_user(struct mic_vdev *mvdev,
+ void __user *ubuf, size_t len, u64 addr)
+{
+ int err;
+ void __iomem *dbuf = mvdev->mdev->aper.va + addr;
+ /*
+ * We are copying to IO below and should ideally use something
+ * like copy_from_user_toio(..) if it existed.
+ */
+ if (copy_from_user(dbuf, ubuf, len)) {
+ err = -EFAULT;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, err);
+ goto err;
+ }
+ mvdev->out_bytes += len;
+ err = 0;
+err:
+ return err;
+}
+
+#define MIC_VRINGH_READ true
+
+/* The function to call to notify the card about added buffers */
+static void mic_notify(struct vringh *vrh)
+{
+ struct mic_vringh *mvrh = container_of(vrh, struct mic_vringh, vrh);
+ struct mic_vdev *mvdev = mvrh->mvdev;
+ s8 db = mvdev->dc->h2c_vdev_db;
+
+ if (db != -1)
+ mvdev->mdev->ops->send_intr(mvdev->mdev, db);
+}
+
+/* Determine the total number of bytes consumed in a VRINGH KIOV */
+static inline u32 mic_vringh_iov_consumed(struct vringh_kiov *iov)
+{
+ int i;
+ u32 total = iov->consumed;
+
+ for (i = 0; i < iov->i; i++)
+ total += iov->iov[i].iov_len;
+ return total;
+}
+
+/*
+ * Traverse the VRINGH KIOV and issue the APIs to trigger the copies.
+ * This API is heavily based on the vringh_iov_xfer(..) implementation
+ * in vringh.c. The reason we cannot reuse vringh_iov_pull_kern(..)
+ * and vringh_iov_push_kern(..) directly is because there is no
+ * way to override the VRINGH xfer(..) routines as of v3.10.
+ */
+static int mic_vringh_copy(struct mic_vdev *mvdev, struct vringh_kiov *iov,
+ void __user *ubuf, size_t len, bool read, size_t *out_len)
+{
+ int ret = 0;
+ size_t partlen, tot_len = 0;
+
+ while (len && iov->i < iov->used) {
+ partlen = min(iov->iov[iov->i].iov_len, len);
+ if (read)
+ ret = mic_virtio_copy_to_user(mvdev,
+ ubuf, partlen,
+ (u64)iov->iov[iov->i].iov_base);
+ else
+ ret = mic_virtio_copy_from_user(mvdev,
+ ubuf, partlen,
+ (u64)iov->iov[iov->i].iov_base);
+ if (ret) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ break;
+ }
+ len -= partlen;
+ ubuf += partlen;
+ tot_len += partlen;
+ iov->consumed += partlen;
+ iov->iov[iov->i].iov_len -= partlen;
+ iov->iov[iov->i].iov_base += partlen;
+ if (!iov->iov[iov->i].iov_len) {
+ /* Fix up old iov element then increment. */
+ iov->iov[iov->i].iov_len = iov->consumed;
+ iov->iov[iov->i].iov_base -= iov->consumed;
+
+ iov->consumed = 0;
+ iov->i++;
+ }
+ }
+ *out_len = tot_len;
+ return ret;
+}
+
+/*
+ * Use the standard VRINGH infrastructure in the kernel to fetch new
+ * descriptors, initiate the copies and update the used ring.
+ */
+static int _mic_virtio_copy(struct mic_vdev *mvdev,
+ struct mic_copy_desc *copy)
+{
+ int ret = 0, iovcnt = copy->iovcnt;
+ struct iovec iov;
+ struct iovec __user *u_iov = copy->iov;
+ void __user *ubuf = NULL;
+ struct mic_vringh *mvr = &mvdev->mvr[copy->vr_idx];
+ struct vringh_kiov *riov = &mvr->riov;
+ struct vringh_kiov *wiov = &mvr->wiov;
+ struct vringh *vrh = &mvr->vrh;
+ u16 *head = &mvr->head;
+ struct mic_vring *vr = &mvr->vring;
+ size_t len = 0, out_len;
+
+ copy->out_len = 0;
+ /* Fetch a new IOVEC if all previous elements have been processed */
+ if (riov->i == riov->used && wiov->i == wiov->used) {
+ ret = vringh_getdesc_kern(vrh, riov, wiov,
+ head, GFP_KERNEL);
+ /* Check if there are available descriptors */
+ if (ret <= 0)
+ return ret;
+ }
+ while (iovcnt) {
+ if (!len) {
+ /* Copy over a new iovec from user space. */
+ ret = copy_from_user(&iov, u_iov, sizeof(*u_iov));
+ if (ret) {
+ ret = -EINVAL;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ break;
+ }
+ len = iov.iov_len;
+ ubuf = iov.iov_base;
+ }
+ /* Issue all the read descriptors first */
+ ret = mic_vringh_copy(mvdev, riov, ubuf, len,
+ MIC_VRINGH_READ, &out_len);
+ if (ret) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ break;
+ }
+ len -= out_len;
+ ubuf += out_len;
+ copy->out_len += out_len;
+ /* Issue the write descriptors next */
+ ret = mic_vringh_copy(mvdev, wiov, ubuf, len,
+ !MIC_VRINGH_READ, &out_len);
+ if (ret) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ break;
+ }
+ len -= out_len;
+ ubuf += out_len;
+ copy->out_len += out_len;
+ if (!len) {
+ /* One user space iovec is now completed */
+ iovcnt--;
+ u_iov++;
+ }
+ /* Exit loop if all elements in KIOVs have been processed. */
+ if (riov->i == riov->used && wiov->i == wiov->used)
+ break;
+ }
+ /*
+ * Update the used ring if a descriptor was available and some data was
+ * copied in/out and the user asked for a used ring update.
+ */
+ if (*head != USHRT_MAX && copy->out_len && copy->update_used) {
+ u32 total = 0;
+
+ /* Determine the total data consumed */
+ total += mic_vringh_iov_consumed(riov);
+ total += mic_vringh_iov_consumed(wiov);
+ vringh_complete_kern(vrh, *head, total);
+ *head = USHRT_MAX;
+ if (vringh_need_notify_kern(vrh) > 0)
+ vringh_notify(vrh);
+ vringh_kiov_cleanup(riov);
+ vringh_kiov_cleanup(wiov);
+ /* Update avail idx for user space */
+ vr->info->avail_idx = vrh->last_avail_idx;
+ }
+ return ret;
+}
+
+static inline int mic_verify_copy_args(struct mic_vdev *mvdev,
+ struct mic_copy_desc *copy)
+{
+ if (copy->vr_idx >= mvdev->dd->num_vq) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -EINVAL);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* Copy a specified number of virtio descriptors in a chain */
+int mic_virtio_copy_desc(struct mic_vdev *mvdev,
+ struct mic_copy_desc *copy)
+{
+ int err;
+ struct mic_vringh *mvr = &mvdev->mvr[copy->vr_idx];
+
+ err = mic_verify_copy_args(mvdev, copy);
+ if (err)
+ return err;
+
+ mutex_lock(&mvr->vr_mutex);
+ if (!mic_vdevup(mvdev)) {
+ err = -ENODEV;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, err);
+ goto err;
+ }
+ err = _mic_virtio_copy(mvdev, copy);
+ if (err) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, err);
+ }
+err:
+ mutex_unlock(&mvr->vr_mutex);
+ return err;
+}
+
+static void mic_virtio_init_post(struct mic_vdev *mvdev)
+{
+ struct mic_vqconfig *vqconfig = mic_vq_config(mvdev->dd);
+ int i;
+
+ for (i = 0; i < mvdev->dd->num_vq; i++) {
+ if (!le64_to_cpu(vqconfig[i].used_address)) {
+ dev_warn(mic_dev(mvdev), "used_address zero??\n");
+ continue;
+ }
+ mvdev->mvr[i].vrh.vring.used =
+ mvdev->mdev->aper.va +
+ le64_to_cpu(vqconfig[i].used_address);
+ }
+
+ mvdev->dc->used_address_updated = 0;
+
+ dev_dbg(mic_dev(mvdev), "%s: device type %d LINKUP\n",
+ __func__, mvdev->virtio_id);
+}
+
+static inline void mic_virtio_device_reset(struct mic_vdev *mvdev)
+{
+ int i;
+
+ dev_dbg(mic_dev(mvdev), "%s: status %d device type %d RESET\n",
+ __func__, mvdev->dd->status, mvdev->virtio_id);
+
+ for (i = 0; i < mvdev->dd->num_vq; i++)
+ /*
+ * Avoid lockdep false positive. The + 1 is for the mic
+ * mutex which is held in the reset devices code path.
+ */
+ mutex_lock_nested(&mvdev->mvr[i].vr_mutex, i + 1);
+
+ /* 0 status means "reset" */
+ mvdev->dd->status = 0;
+ mvdev->dc->vdev_reset = 0;
+ mvdev->dc->host_ack = 1;
+
+ for (i = 0; i < mvdev->dd->num_vq; i++) {
+ struct vringh *vrh = &mvdev->mvr[i].vrh;
+ mvdev->mvr[i].vring.info->avail_idx = 0;
+ vrh->completed = 0;
+ vrh->last_avail_idx = 0;
+ vrh->last_used_idx = 0;
+ }
+
+ for (i = 0; i < mvdev->dd->num_vq; i++)
+ mutex_unlock(&mvdev->mvr[i].vr_mutex);
+}
+
+void mic_virtio_reset_devices(struct mic_device *mdev)
+{
+ struct list_head *pos, *tmp;
+ struct mic_vdev *mvdev;
+
+ dev_dbg(mdev->sdev->parent, "%s\n", __func__);
+
+ list_for_each_safe(pos, tmp, &mdev->vdev_list) {
+ mvdev = list_entry(pos, struct mic_vdev, list);
+ mic_virtio_device_reset(mvdev);
+ mvdev->poll_wake = 1;
+ wake_up(&mvdev->waitq);
+ }
+}
+
+void mic_bh_handler(struct work_struct *work)
+{
+ struct mic_vdev *mvdev = container_of(work, struct mic_vdev,
+ virtio_bh_work);
+
+ if (mvdev->dc->used_address_updated)
+ mic_virtio_init_post(mvdev);
+
+ if (mvdev->dc->vdev_reset)
+ mic_virtio_device_reset(mvdev);
+
+ mvdev->poll_wake = 1;
+ wake_up(&mvdev->waitq);
+}
+
+static irqreturn_t mic_virtio_intr_handler(int irq, void *data)
+{
+ struct mic_vdev *mvdev = data;
+ struct mic_device *mdev = mvdev->mdev;
+
+ mdev->ops->ack_interrupt(mdev);
+ schedule_work(&mvdev->virtio_bh_work);
+ return IRQ_HANDLED;
+}
+
+int mic_virtio_config_change(struct mic_vdev *mvdev,
+ void __user *argp)
+{
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
+ int ret = 0, retry = 100, i;
+ struct mic_bootparam *bootparam = mvdev->mdev->dp;
+ s8 db = bootparam->h2c_config_db;
+
+ mutex_lock(&mvdev->mdev->mic_mutex);
+ for (i = 0; i < mvdev->dd->num_vq; i++)
+ mutex_lock_nested(&mvdev->mvr[i].vr_mutex, i + 1);
+
+ if (db == -1 || mvdev->dd->type == -1) {
+ ret = -EIO;
+ goto exit;
+ }
+
+ if (copy_from_user(mic_vq_configspace(mvdev->dd),
+ argp, mvdev->dd->config_len)) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -EFAULT);
+ ret = -EFAULT;
+ goto exit;
+ }
+ mvdev->dc->config_change = MIC_VIRTIO_PARAM_CONFIG_CHANGED;
+ mvdev->mdev->ops->send_intr(mvdev->mdev, db);
+
+ for (i = retry; i--;) {
+ ret = wait_event_timeout(wake,
+ mvdev->dc->guest_ack, msecs_to_jiffies(100));
+ if (ret)
+ break;
+ }
+
+ dev_dbg(mic_dev(mvdev),
+ "%s %d retry: %d\n", __func__, __LINE__, retry);
+ mvdev->dc->config_change = 0;
+ mvdev->dc->guest_ack = 0;
+exit:
+ for (i = 0; i < mvdev->dd->num_vq; i++)
+ mutex_unlock(&mvdev->mvr[i].vr_mutex);
+ mutex_unlock(&mvdev->mdev->mic_mutex);
+ return ret;
+}
+
+static int mic_copy_dp_entry(struct mic_vdev *mvdev,
+ void __user *argp,
+ __u8 *type,
+ struct mic_device_desc **devpage)
+{
+ struct mic_device *mdev = mvdev->mdev;
+ struct mic_device_desc dd, *dd_config, *devp;
+ struct mic_vqconfig *vqconfig;
+ int ret = 0, i;
+ bool slot_found = false;
+
+ if (copy_from_user(&dd, argp, sizeof(dd))) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -EFAULT);
+ return -EFAULT;
+ }
+
+ if (mic_aligned_desc_size(&dd) > MIC_MAX_DESC_BLK_SIZE ||
+ dd.num_vq > MIC_MAX_VRINGS) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -EINVAL);
+ return -EINVAL;
+ }
+
+ dd_config = kmalloc(mic_desc_size(&dd), GFP_KERNEL);
+ if (dd_config == NULL) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -ENOMEM);
+ return -ENOMEM;
+ }
+ if (copy_from_user(dd_config, argp, mic_desc_size(&dd))) {
+ ret = -EFAULT;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto exit;
+ }
+
+ vqconfig = mic_vq_config(dd_config);
+ for (i = 0; i < dd.num_vq; i++) {
+ if (le16_to_cpu(vqconfig[i].num) > MIC_MAX_VRING_ENTRIES) {
+ ret = -EINVAL;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto exit;
+ }
+ }
+
+ /* Find the first free device page entry */
+ for (i = mic_aligned_size(struct mic_bootparam);
+ i < MIC_DP_SIZE - mic_total_desc_size(dd_config);
+ i += mic_total_desc_size(devp)) {
+ devp = mdev->dp + i;
+ if (devp->type == 0 || devp->type == -1) {
+ slot_found = true;
+ break;
+ }
+ }
+ if (!slot_found) {
+ ret = -EINVAL;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto exit;
+ }
+ /*
+ * Save off the type before doing the memcpy. Type will be set in the
+ * end after completing all initialization for the new device.
+ */
+ *type = dd_config->type;
+ dd_config->type = 0;
+ memcpy(devp, dd_config, mic_desc_size(dd_config));
+
+ *devpage = devp;
+exit:
+ kfree(dd_config);
+ return ret;
+}
+
+static void mic_init_device_ctrl(struct mic_vdev *mvdev,
+ struct mic_device_desc *devpage)
+{
+ struct mic_device_ctrl *dc;
+
+ dc = (void *)devpage + mic_aligned_desc_size(devpage);
+
+ dc->config_change = 0;
+ dc->guest_ack = 0;
+ dc->vdev_reset = 0;
+ dc->host_ack = 0;
+ dc->used_address_updated = 0;
+ dc->c2h_vdev_db = -1;
+ dc->h2c_vdev_db = -1;
+ mvdev->dc = dc;
+}
+
+int mic_virtio_add_device(struct mic_vdev *mvdev,
+ void __user *argp)
+{
+ struct mic_device *mdev = mvdev->mdev;
+ struct mic_device_desc *dd = NULL;
+ struct mic_vqconfig *vqconfig;
+ int vr_size, i, j, ret;
+ u8 type = 0;
+ s8 db;
+ char irqname[10];
+ struct mic_bootparam *bootparam = mdev->dp;
+ u16 num;
+
+ mutex_lock(&mdev->mic_mutex);
+
+ ret = mic_copy_dp_entry(mvdev, argp, &type, &dd);
+ if (ret) {
+ mutex_unlock(&mdev->mic_mutex);
+ return ret;
+ }
+
+ mic_init_device_ctrl(mvdev, dd);
+
+ mvdev->dd = dd;
+ mvdev->virtio_id = type;
+ vqconfig = mic_vq_config(dd);
+ INIT_WORK(&mvdev->virtio_bh_work, mic_bh_handler);
+
+ for (i = 0; i < dd->num_vq; i++) {
+ struct mic_vringh *mvr = &mvdev->mvr[i];
+ struct mic_vring *vr = &mvdev->mvr[i].vring;
+ num = le16_to_cpu(vqconfig[i].num);
+ mutex_init(&mvr->vr_mutex);
+ vr_size = PAGE_ALIGN(vring_size(num, MIC_VIRTIO_RING_ALIGN) +
+ sizeof(struct _mic_vring_info));
+ vr->va = (void *)
+ __get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(vr_size));
+ if (!vr->va) {
+ ret = -ENOMEM;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto err;
+ }
+ vr->len = vr_size;
+ vr->info = vr->va + vring_size(num, MIC_VIRTIO_RING_ALIGN);
+ vr->info->magic = MIC_MAGIC + mvdev->virtio_id + i;
+ vqconfig[i].address = mic_map_single(mdev,
+ vr->va, vr_size);
+ if (mic_map_error(vqconfig[i].address)) {
+ free_pages((unsigned long)vr->va, get_order(vr_size));
+ ret = -ENOMEM;
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto err;
+ }
+ vqconfig[i].address = cpu_to_le64(vqconfig[i].address);
+
+ vring_init(&vr->vr, num, vr->va, MIC_VIRTIO_RING_ALIGN);
+ ret = vringh_init_kern(&mvr->vrh,
+ *(u32 *)mic_vq_features(mvdev->dd), num, false,
+ vr->vr.desc, vr->vr.avail, vr->vr.used);
+ if (ret) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, ret);
+ goto err;
+ }
+ vringh_kiov_init(&mvr->riov, NULL, 0);
+ vringh_kiov_init(&mvr->wiov, NULL, 0);
+ mvr->head = USHRT_MAX;
+ mvr->mvdev = mvdev;
+ mvr->vrh.notify = mic_notify;
+ dev_dbg(mdev->sdev->parent,
+ "%s %d index %d va %p info %p vr_size 0x%x\n",
+ __func__, __LINE__, i, vr->va, vr->info, vr_size);
+ }
+
+ snprintf(irqname, sizeof(irqname), "mic%dvirtio%d", mdev->id,
+ mvdev->virtio_id);
+ mvdev->virtio_db = mic_next_db(mdev);
+ mvdev->virtio_cookie = mic_request_irq(mdev, mic_virtio_intr_handler,
+ irqname, mvdev, mvdev->virtio_db, MIC_INTR_DB);
+ if (IS_ERR(mvdev->virtio_cookie)) {
+ ret = PTR_ERR(mvdev->virtio_cookie);
+ dev_dbg(mdev->sdev->parent, "request irq failed\n");
+ goto err;
+ }
+
+ mvdev->dc->c2h_vdev_db = mvdev->virtio_db;
+
+ list_add_tail(&mvdev->list, &mdev->vdev_list);
+ /*
+ * Order the type update with previous stores. This write barrier
+ * is paired with the corresponding read barrier before the uncached
+ * system memory read of the type, on the card while scanning the
+ * device page.
+ */
+ smp_wmb();
+ dd->type = type;
+
+ dev_dbg(mdev->sdev->parent, "Added virtio device id %d\n", dd->type);
+
+ db = bootparam->h2c_config_db;
+ if (db != -1)
+ mdev->ops->send_intr(mdev, db);
+ mutex_unlock(&mdev->mic_mutex);
+ return 0;
+err:
+ vqconfig = mic_vq_config(dd);
+ for (j = 0; j < i; j++) {
+ struct mic_vringh *mvr = &mvdev->mvr[j];
+ mic_unmap_single(mdev, le64_to_cpu(vqconfig[j].address),
+ mvr->vring.len);
+ free_pages((unsigned long)mvr->vring.va,
+ get_order(mvr->vring.len));
+ }
+ mutex_unlock(&mdev->mic_mutex);
+ return ret;
+}
+
+void mic_virtio_del_device(struct mic_vdev *mvdev)
+{
+ struct list_head *pos, *tmp;
+ struct mic_vdev *tmp_mvdev;
+ struct mic_device *mdev = mvdev->mdev;
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
+ int i, ret, retry = 100;
+ struct mic_vqconfig *vqconfig;
+ struct mic_bootparam *bootparam = mdev->dp;
+ s8 db;
+
+ mutex_lock(&mdev->mic_mutex);
+ db = bootparam->h2c_config_db;
+ if (db == -1)
+ goto skip_hot_remove;
+ dev_dbg(mdev->sdev->parent,
+ "Requesting hot remove id %d\n", mvdev->virtio_id);
+ mvdev->dc->config_change = MIC_VIRTIO_PARAM_DEV_REMOVE;
+ mdev->ops->send_intr(mdev, db);
+ for (i = retry; i--;) {
+ ret = wait_event_timeout(wake,
+ mvdev->dc->guest_ack, msecs_to_jiffies(100));
+ if (ret)
+ break;
+ }
+ dev_dbg(mdev->sdev->parent,
+ "Device id %d config_change %d guest_ack %d\n",
+ mvdev->virtio_id, mvdev->dc->config_change,
+ mvdev->dc->guest_ack);
+ mvdev->dc->config_change = 0;
+ mvdev->dc->guest_ack = 0;
+skip_hot_remove:
+ mic_free_irq(mdev, mvdev->virtio_cookie, mvdev);
+ flush_work(&mvdev->virtio_bh_work);
+ vqconfig = mic_vq_config(mvdev->dd);
+ for (i = 0; i < mvdev->dd->num_vq; i++) {
+ struct mic_vringh *mvr = &mvdev->mvr[i];
+ vringh_kiov_cleanup(&mvr->riov);
+ vringh_kiov_cleanup(&mvr->wiov);
+ mic_unmap_single(mdev, le64_to_cpu(vqconfig[i].address),
+ mvr->vring.len);
+ free_pages((unsigned long)mvr->vring.va,
+ get_order(mvr->vring.len));
+ }
+
+ list_for_each_safe(pos, tmp, &mdev->vdev_list) {
+ tmp_mvdev = list_entry(pos, struct mic_vdev, list);
+ if (tmp_mvdev == mvdev) {
+ list_del(pos);
+ dev_dbg(mdev->sdev->parent,
+ "Removing virtio device id %d\n",
+ mvdev->virtio_id);
+ break;
+ }
+ }
+ /*
+ * Order the type update with previous stores. This write barrier
+ * is paired with the corresponding read barrier before the uncached
+ * system memory read of the type, on the card while scanning the
+ * device page.
+ */
+ smp_wmb();
+ mvdev->dd->type = -1;
+ mutex_unlock(&mdev->mic_mutex);
+}
diff --git a/drivers/misc/mic/host/mic_virtio.h b/drivers/misc/mic/host/mic_virtio.h
new file mode 100644
index 000000000000..184f3c84805b
--- /dev/null
+++ b/drivers/misc/mic/host/mic_virtio.h
@@ -0,0 +1,138 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef MIC_VIRTIO_H
+#define MIC_VIRTIO_H
+
+#include <linux/virtio_config.h>
+#include <linux/mic_ioctl.h>
+
+/*
+ * Note on endianness.
+ * 1. Host can be both BE or LE
+ * 2. Guest/card is LE. Host uses le_to_cpu to access desc/avail
+ * rings and ioreadXX/iowriteXX to access used ring.
+ * 3. Device page exposed by host to guest contains LE values. Guest
+ * accesses these using ioreadXX/iowriteXX etc. This way in general we
+ * obey the virtio spec according to which guest works with native
+ * endianness and host is aware of guest endianness and does all
+ * required endianness conversion.
+ * 4. Data provided from user space to guest (in ADD_DEVICE and
+ * CONFIG_CHANGE ioctl's) is not interpreted by the driver and should be
+ * in guest endianness.
+ */
+
+/**
+ * struct mic_vringh - Virtio ring host information.
+ *
+ * @vring: The MIC vring used for setting up user space mappings.
+ * @vrh: The host VRINGH used for accessing the card vrings.
+ * @riov: The VRINGH read kernel IOV.
+ * @wiov: The VRINGH write kernel IOV.
+ * @head: The VRINGH head index address passed to vringh_getdesc_kern(..).
+ * @vr_mutex: Mutex for synchronizing access to the VRING.
+ * @mvdev: Back pointer to MIC virtio device for vringh_notify(..).
+ */
+struct mic_vringh {
+ struct mic_vring vring;
+ struct vringh vrh;
+ struct vringh_kiov riov;
+ struct vringh_kiov wiov;
+ u16 head;
+ struct mutex vr_mutex;
+ struct mic_vdev *mvdev;
+};
+
+/**
+ * struct mic_vdev - Host information for a card Virtio device.
+ *
+ * @virtio_id - Virtio device id.
+ * @waitq - Waitqueue to allow ring3 apps to poll.
+ * @mdev - Back pointer to host MIC device.
+ * @poll_wake - Used for waking up threads blocked in poll.
+ * @out_bytes - Debug stats for number of bytes copied from host to card.
+ * @in_bytes - Debug stats for number of bytes copied from card to host.
+ * @mvr - Store per VRING data structures.
+ * @virtio_bh_work - Work struct used to schedule virtio bottom half handling.
+ * @dd - Virtio device descriptor.
+ * @dc - Virtio device control fields.
+ * @list - List of Virtio devices.
+ * @virtio_db - The doorbell used by the card to interrupt the host.
+ * @virtio_cookie - The cookie returned while requesting interrupts.
+ */
+struct mic_vdev {
+ int virtio_id;
+ wait_queue_head_t waitq;
+ struct mic_device *mdev;
+ int poll_wake;
+ unsigned long out_bytes;
+ unsigned long in_bytes;
+ struct mic_vringh mvr[MIC_MAX_VRINGS];
+ struct work_struct virtio_bh_work;
+ struct mic_device_desc *dd;
+ struct mic_device_ctrl *dc;
+ struct list_head list;
+ int virtio_db;
+ struct mic_irq *virtio_cookie;
+};
+
+void mic_virtio_uninit(struct mic_device *mdev);
+int mic_virtio_add_device(struct mic_vdev *mvdev,
+ void __user *argp);
+void mic_virtio_del_device(struct mic_vdev *mvdev);
+int mic_virtio_config_change(struct mic_vdev *mvdev,
+ void __user *argp);
+int mic_virtio_copy_desc(struct mic_vdev *mvdev,
+ struct mic_copy_desc *request);
+void mic_virtio_reset_devices(struct mic_device *mdev);
+void mic_bh_handler(struct work_struct *work);
+
+/* Helper API to obtain the MIC PCIe device */
+static inline struct device *mic_dev(struct mic_vdev *mvdev)
+{
+ return mvdev->mdev->sdev->parent;
+}
+
+/* Helper API to check if a virtio device is initialized */
+static inline int mic_vdev_inited(struct mic_vdev *mvdev)
+{
+ /* Device has not been created yet */
+ if (!mvdev->dd || !mvdev->dd->type) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -EINVAL);
+ return -EINVAL;
+ }
+
+ /* Device has been removed/deleted */
+ if (mvdev->dd->type == -1) {
+ dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ __func__, __LINE__, -ENODEV);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/* Helper API to check if a virtio device is running */
+static inline bool mic_vdevup(struct mic_vdev *mvdev)
+{
+ return !!mvdev->dd->status;
+}
+#endif
diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c
new file mode 100644
index 000000000000..81e9541b784c
--- /dev/null
+++ b/drivers/misc/mic/host/mic_x100.c
@@ -0,0 +1,570 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#include <linux/fs.h>
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+
+#include "../common/mic_dev.h"
+#include "mic_device.h"
+#include "mic_x100.h"
+#include "mic_smpt.h"
+
+/**
+ * mic_x100_write_spad - write to the scratchpad register
+ * @mdev: pointer to mic_device instance
+ * @idx: index to the scratchpad register, 0 based
+ * @val: the data value to put into the register
+ *
+ * This function allows writing of a 32bit value to the indexed scratchpad
+ * register.
+ *
+ * RETURNS: none.
+ */
+static void
+mic_x100_write_spad(struct mic_device *mdev, unsigned int idx, u32 val)
+{
+ dev_dbg(mdev->sdev->parent, "Writing 0x%x to scratch pad index %d\n",
+ val, idx);
+ mic_mmio_write(&mdev->mmio, val,
+ MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_SPAD0 + idx * 4);
+}
+
+/**
+ * mic_x100_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.
+ */
+static u32
+mic_x100_read_spad(struct mic_device *mdev, unsigned int idx)
+{
+ u32 val = mic_mmio_read(&mdev->mmio,
+ MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_SPAD0 + idx * 4);
+
+ dev_dbg(mdev->sdev->parent,
+ "Reading 0x%x from scratch pad index %d\n", val, idx);
+ return val;
+}
+
+/**
+ * mic_x100_enable_interrupts - Enable interrupts.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_enable_interrupts(struct mic_device *mdev)
+{
+ u32 reg;
+ struct mic_mw *mw = &mdev->mmio;
+ u32 sice0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICE0;
+ u32 siac0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SIAC0;
+
+ reg = mic_mmio_read(mw, sice0);
+ reg |= MIC_X100_SBOX_DBR_BITS(0xf) | MIC_X100_SBOX_DMA_BITS(0xff);
+ mic_mmio_write(mw, reg, sice0);
+
+ /*
+ * Enable auto-clear when enabling interrupts. Applicable only for
+ * MSI-x. Legacy and MSI mode cannot have auto-clear enabled.
+ */
+ if (mdev->irq_info.num_vectors > 1) {
+ reg = mic_mmio_read(mw, siac0);
+ reg |= MIC_X100_SBOX_DBR_BITS(0xf) |
+ MIC_X100_SBOX_DMA_BITS(0xff);
+ mic_mmio_write(mw, reg, siac0);
+ }
+}
+
+/**
+ * mic_x100_disable_interrupts - Disable interrupts.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_disable_interrupts(struct mic_device *mdev)
+{
+ u32 reg;
+ struct mic_mw *mw = &mdev->mmio;
+ u32 sice0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICE0;
+ u32 siac0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SIAC0;
+ u32 sicc0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICC0;
+
+ reg = mic_mmio_read(mw, sice0);
+ mic_mmio_write(mw, reg, sicc0);
+
+ if (mdev->irq_info.num_vectors > 1) {
+ reg = mic_mmio_read(mw, siac0);
+ reg &= ~(MIC_X100_SBOX_DBR_BITS(0xf) |
+ MIC_X100_SBOX_DMA_BITS(0xff));
+ mic_mmio_write(mw, reg, siac0);
+ }
+}
+
+/**
+ * mic_x100_send_sbox_intr - Send an MIC_X100_SBOX interrupt to MIC.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_send_sbox_intr(struct mic_device *mdev,
+ int doorbell)
+{
+ struct mic_mw *mw = &mdev->mmio;
+ u64 apic_icr_offset = MIC_X100_SBOX_APICICR0 + doorbell * 8;
+ u32 apicicr_low = mic_mmio_read(mw, MIC_X100_SBOX_BASE_ADDRESS +
+ apic_icr_offset);
+
+ /* for MIC we need to make sure we "hit" the send_icr bit (13) */
+ apicicr_low = (apicicr_low | (1 << 13));
+
+ /* Ensure that the interrupt is ordered w.r.t. previous stores. */
+ wmb();
+ mic_mmio_write(mw, apicicr_low,
+ MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
+}
+
+/**
+ * mic_x100_send_rdmasr_intr - Send an RDMASR interrupt to MIC.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_send_rdmasr_intr(struct mic_device *mdev,
+ int doorbell)
+{
+ int rdmasr_offset = MIC_X100_SBOX_RDMASR0 + (doorbell << 2);
+ /* Ensure that the interrupt is ordered w.r.t. previous stores. */
+ wmb();
+ mic_mmio_write(&mdev->mmio, 0,
+ MIC_X100_SBOX_BASE_ADDRESS + rdmasr_offset);
+}
+
+/**
+ * __mic_x100_send_intr - Send interrupt to MIC.
+ * @mdev: pointer to mic_device instance
+ * @doorbell: doorbell number.
+ */
+static void mic_x100_send_intr(struct mic_device *mdev, int doorbell)
+{
+ int rdmasr_db;
+ if (doorbell < MIC_X100_NUM_SBOX_IRQ) {
+ mic_x100_send_sbox_intr(mdev, doorbell);
+ } else {
+ rdmasr_db = doorbell - MIC_X100_NUM_SBOX_IRQ +
+ MIC_X100_RDMASR_IRQ_BASE;
+ mic_x100_send_rdmasr_intr(mdev, rdmasr_db);
+ }
+}
+
+/**
+ * mic_ack_interrupt - Device specific interrupt handling.
+ * @mdev: pointer to mic_device instance
+ *
+ * Returns: bitmask of doorbell events triggered.
+ */
+static u32 mic_x100_ack_interrupt(struct mic_device *mdev)
+{
+ u32 reg = 0;
+ struct mic_mw *mw = &mdev->mmio;
+ u32 sicr0 = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_SICR0;
+
+ /* Clear pending bit array. */
+ if (MIC_A0_STEP == mdev->stepping)
+ mic_mmio_write(mw, 1, MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_MSIXPBACR);
+
+ if (mdev->irq_info.num_vectors <= 1) {
+ reg = mic_mmio_read(mw, sicr0);
+
+ if (unlikely(!reg))
+ goto done;
+
+ mic_mmio_write(mw, reg, sicr0);
+ }
+
+ if (mdev->stepping >= MIC_B0_STEP)
+ mdev->intr_ops->enable_interrupts(mdev);
+done:
+ return reg;
+}
+
+/**
+ * mic_x100_hw_intr_init - Initialize h/w specific interrupt
+ * information.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_hw_intr_init(struct mic_device *mdev)
+{
+ mdev->intr_info = (struct mic_intr_info *)mic_x100_intr_init;
+}
+
+/**
+ * mic_x100_read_msi_to_src_map - read from the MSI mapping registers
+ * @mdev: pointer to mic_device instance
+ * @idx: index to the mapping register, 0 based
+ *
+ * This function allows reading of the 32bit MSI mapping register.
+ *
+ * RETURNS: The value in the register.
+ */
+static u32
+mic_x100_read_msi_to_src_map(struct mic_device *mdev, int idx)
+{
+ return mic_mmio_read(&mdev->mmio,
+ MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_MXAR0 + idx * 4);
+}
+
+/**
+ * mic_x100_program_msi_to_src_map - program the MSI mapping registers
+ * @mdev: pointer to mic_device instance
+ * @idx: index to the mapping register, 0 based
+ * @offset: The bit offset in the register that needs to be updated.
+ * @set: boolean specifying if the bit in the specified offset needs
+ * to be set or cleared.
+ *
+ * RETURNS: None.
+ */
+static void
+mic_x100_program_msi_to_src_map(struct mic_device *mdev,
+ int idx, int offset, bool set)
+{
+ unsigned long reg;
+ struct mic_mw *mw = &mdev->mmio;
+ u32 mxar = MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_MXAR0 + idx * 4;
+
+ reg = mic_mmio_read(mw, mxar);
+ if (set)
+ __set_bit(offset, &reg);
+ else
+ __clear_bit(offset, &reg);
+ mic_mmio_write(mw, reg, mxar);
+}
+
+/*
+ * mic_x100_reset_fw_ready - Reset Firmware ready status field.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_reset_fw_ready(struct mic_device *mdev)
+{
+ mdev->ops->write_spad(mdev, MIC_X100_DOWNLOAD_INFO, 0);
+}
+
+/*
+ * mic_x100_is_fw_ready - Check if firmware is ready.
+ * @mdev: pointer to mic_device instance
+ */
+static bool mic_x100_is_fw_ready(struct mic_device *mdev)
+{
+ u32 scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
+ return MIC_X100_SPAD2_DOWNLOAD_STATUS(scratch2) ? true : false;
+}
+
+/**
+ * mic_x100_get_apic_id - Get bootstrap APIC ID.
+ * @mdev: pointer to mic_device instance
+ */
+static u32 mic_x100_get_apic_id(struct mic_device *mdev)
+{
+ u32 scratch2 = 0;
+
+ scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
+ return MIC_X100_SPAD2_APIC_ID(scratch2);
+}
+
+/**
+ * mic_x100_send_firmware_intr - Send an interrupt to the firmware on MIC.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_send_firmware_intr(struct mic_device *mdev)
+{
+ u32 apicicr_low;
+ u64 apic_icr_offset = MIC_X100_SBOX_APICICR7;
+ int vector = MIC_X100_BSP_INTERRUPT_VECTOR;
+ struct mic_mw *mw = &mdev->mmio;
+
+ /*
+ * For MIC we need to make sure we "hit"
+ * the send_icr bit (13).
+ */
+ apicicr_low = (vector | (1 << 13));
+
+ mic_mmio_write(mw, mic_x100_get_apic_id(mdev),
+ MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset + 4);
+
+ /* Ensure that the interrupt is ordered w.r.t. previous stores. */
+ wmb();
+ mic_mmio_write(mw, apicicr_low,
+ MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
+}
+
+/**
+ * mic_x100_hw_reset - Reset the MIC device.
+ * @mdev: pointer to mic_device instance
+ */
+static void mic_x100_hw_reset(struct mic_device *mdev)
+{
+ u32 reset_reg;
+ u32 rgcr = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_RGCR;
+ struct mic_mw *mw = &mdev->mmio;
+
+ /* Ensure that the reset is ordered w.r.t. previous loads and stores */
+ mb();
+ /* Trigger reset */
+ reset_reg = mic_mmio_read(mw, rgcr);
+ reset_reg |= 0x1;
+ mic_mmio_write(mw, reset_reg, rgcr);
+ /*
+ * It seems we really want to delay at least 1 second
+ * after touching reset to prevent a lot of problems.
+ */
+ msleep(1000);
+}
+
+/**
+ * mic_x100_load_command_line - Load command line to MIC.
+ * @mdev: pointer to mic_device instance
+ * @fw: the firmware image
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int
+mic_x100_load_command_line(struct mic_device *mdev, const struct firmware *fw)
+{
+ u32 len = 0;
+ u32 boot_mem;
+ char *buf;
+ void __iomem *cmd_line_va = mdev->aper.va + mdev->bootaddr + fw->size;
+#define CMDLINE_SIZE 2048
+
+ boot_mem = mdev->aper.len >> 20;
+ buf = kzalloc(CMDLINE_SIZE, GFP_KERNEL);
+ if (!buf) {
+ dev_err(mdev->sdev->parent,
+ "%s %d allocation failed\n", __func__, __LINE__);
+ return -ENOMEM;
+ }
+ len += snprintf(buf, CMDLINE_SIZE - len,
+ " mem=%dM", boot_mem);
+ if (mdev->cmdline)
+ snprintf(buf + len, CMDLINE_SIZE - len, " %s", mdev->cmdline);
+ memcpy_toio(cmd_line_va, buf, strlen(buf) + 1);
+ kfree(buf);
+ return 0;
+}
+
+/**
+ * mic_x100_load_ramdisk - Load ramdisk to MIC.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int
+mic_x100_load_ramdisk(struct mic_device *mdev)
+{
+ const struct firmware *fw;
+ int rc;
+ struct boot_params __iomem *bp = mdev->aper.va + mdev->bootaddr;
+
+ rc = request_firmware(&fw,
+ mdev->ramdisk, mdev->sdev->parent);
+ if (rc < 0) {
+ dev_err(mdev->sdev->parent,
+ "ramdisk request_firmware failed: %d %s\n",
+ rc, mdev->ramdisk);
+ goto error;
+ }
+ /*
+ * Typically the bootaddr for card OS is 64M
+ * so copy over the ramdisk @ 128M.
+ */
+ memcpy_toio(mdev->aper.va + (mdev->bootaddr << 1), fw->data, fw->size);
+ iowrite32(cpu_to_le32(mdev->bootaddr << 1), &bp->hdr.ramdisk_image);
+ iowrite32(cpu_to_le32(fw->size), &bp->hdr.ramdisk_size);
+ release_firmware(fw);
+error:
+ return rc;
+}
+
+/**
+ * mic_x100_get_boot_addr - Get MIC boot address.
+ * @mdev: pointer to mic_device instance
+ *
+ * This function is called during firmware load to determine
+ * the address at which the OS should be downloaded in card
+ * memory i.e. GDDR.
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int
+mic_x100_get_boot_addr(struct mic_device *mdev)
+{
+ u32 scratch2, boot_addr;
+ int rc = 0;
+
+ scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO);
+ boot_addr = MIC_X100_SPAD2_DOWNLOAD_ADDR(scratch2);
+ dev_dbg(mdev->sdev->parent, "%s %d boot_addr 0x%x\n",
+ __func__, __LINE__, boot_addr);
+ if (boot_addr > (1 << 31)) {
+ dev_err(mdev->sdev->parent,
+ "incorrect bootaddr 0x%x\n",
+ boot_addr);
+ rc = -EINVAL;
+ goto error;
+ }
+ mdev->bootaddr = boot_addr;
+error:
+ return rc;
+}
+
+/**
+ * mic_x100_load_firmware - Load firmware to MIC.
+ * @mdev: pointer to mic_device instance
+ * @buf: buffer containing boot string including firmware/ramdisk path.
+ *
+ * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
+ */
+static int
+mic_x100_load_firmware(struct mic_device *mdev, const char *buf)
+{
+ int rc;
+ const struct firmware *fw;
+
+ rc = mic_x100_get_boot_addr(mdev);
+ if (rc)
+ goto error;
+ /* load OS */
+ rc = request_firmware(&fw, mdev->firmware, mdev->sdev->parent);
+ if (rc < 0) {
+ dev_err(mdev->sdev->parent,
+ "ramdisk request_firmware failed: %d %s\n",
+ rc, mdev->firmware);
+ goto error;
+ }
+ if (mdev->bootaddr > mdev->aper.len - fw->size) {
+ rc = -EINVAL;
+ dev_err(mdev->sdev->parent, "%s %d rc %d bootaddr 0x%x\n",
+ __func__, __LINE__, rc, mdev->bootaddr);
+ release_firmware(fw);
+ goto error;
+ }
+ memcpy_toio(mdev->aper.va + mdev->bootaddr, fw->data, fw->size);
+ mdev->ops->write_spad(mdev, MIC_X100_FW_SIZE, fw->size);
+ if (!strcmp(mdev->bootmode, "elf"))
+ goto done;
+ /* load command line */
+ rc = mic_x100_load_command_line(mdev, fw);
+ if (rc) {
+ dev_err(mdev->sdev->parent, "%s %d rc %d\n",
+ __func__, __LINE__, rc);
+ goto error;
+ }
+ release_firmware(fw);
+ /* load ramdisk */
+ if (mdev->ramdisk)
+ rc = mic_x100_load_ramdisk(mdev);
+error:
+ dev_dbg(mdev->sdev->parent, "%s %d rc %d\n", __func__, __LINE__, rc);
+done:
+ return rc;
+}
+
+/**
+ * mic_x100_get_postcode - Get postcode status from firmware.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: postcode.
+ */
+static u32 mic_x100_get_postcode(struct mic_device *mdev)
+{
+ return mic_mmio_read(&mdev->mmio, MIC_X100_POSTCODE);
+}
+
+/**
+ * mic_x100_smpt_set - Update an SMPT entry with a DMA address.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: none.
+ */
+static void
+mic_x100_smpt_set(struct mic_device *mdev, dma_addr_t dma_addr, u8 index)
+{
+#define SNOOP_ON (0 << 0)
+#define SNOOP_OFF (1 << 0)
+/*
+ * Sbox Smpt Reg Bits:
+ * Bits 31:2 Host address
+ * Bits 1 RSVD
+ * Bits 0 No snoop
+ */
+#define BUILD_SMPT(NO_SNOOP, HOST_ADDR) \
+ (u32)(((HOST_ADDR) << 2) | ((NO_SNOOP) & 0x01))
+
+ uint32_t smpt_reg_val = BUILD_SMPT(SNOOP_ON,
+ dma_addr >> mdev->smpt->info.page_shift);
+ mic_mmio_write(&mdev->mmio, smpt_reg_val,
+ MIC_X100_SBOX_BASE_ADDRESS +
+ MIC_X100_SBOX_SMPT00 + (4 * index));
+}
+
+/**
+ * mic_x100_smpt_hw_init - Initialize SMPT X100 specific fields.
+ * @mdev: pointer to mic_device instance
+ *
+ * RETURNS: none.
+ */
+static void mic_x100_smpt_hw_init(struct mic_device *mdev)
+{
+ struct mic_smpt_hw_info *info = &mdev->smpt->info;
+
+ info->num_reg = 32;
+ info->page_shift = 34;
+ info->page_size = (1ULL << info->page_shift);
+ info->base = 0x8000000000ULL;
+}
+
+struct mic_smpt_ops mic_x100_smpt_ops = {
+ .init = mic_x100_smpt_hw_init,
+ .set = mic_x100_smpt_set,
+};
+
+struct mic_hw_ops mic_x100_ops = {
+ .aper_bar = MIC_X100_APER_BAR,
+ .mmio_bar = MIC_X100_MMIO_BAR,
+ .read_spad = mic_x100_read_spad,
+ .write_spad = mic_x100_write_spad,
+ .send_intr = mic_x100_send_intr,
+ .ack_interrupt = mic_x100_ack_interrupt,
+ .reset = mic_x100_hw_reset,
+ .reset_fw_ready = mic_x100_reset_fw_ready,
+ .is_fw_ready = mic_x100_is_fw_ready,
+ .send_firmware_intr = mic_x100_send_firmware_intr,
+ .load_mic_fw = mic_x100_load_firmware,
+ .get_postcode = mic_x100_get_postcode,
+};
+
+struct mic_hw_intr_ops mic_x100_intr_ops = {
+ .intr_init = mic_x100_hw_intr_init,
+ .enable_interrupts = mic_x100_enable_interrupts,
+ .disable_interrupts = mic_x100_disable_interrupts,
+ .program_msi_to_src_map = mic_x100_program_msi_to_src_map,
+ .read_msi_to_src_map = mic_x100_read_msi_to_src_map,
+};
diff --git a/drivers/misc/mic/host/mic_x100.h b/drivers/misc/mic/host/mic_x100.h
new file mode 100644
index 000000000000..8b7daa182e54
--- /dev/null
+++ b/drivers/misc/mic/host/mic_x100.h
@@ -0,0 +1,98 @@
+/*
+ * 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".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef _MIC_X100_HW_H_
+#define _MIC_X100_HW_H_
+
+#define MIC_X100_PCI_DEVICE_2250 0x2250
+#define MIC_X100_PCI_DEVICE_2251 0x2251
+#define MIC_X100_PCI_DEVICE_2252 0x2252
+#define MIC_X100_PCI_DEVICE_2253 0x2253
+#define MIC_X100_PCI_DEVICE_2254 0x2254
+#define MIC_X100_PCI_DEVICE_2255 0x2255
+#define MIC_X100_PCI_DEVICE_2256 0x2256
+#define MIC_X100_PCI_DEVICE_2257 0x2257
+#define MIC_X100_PCI_DEVICE_2258 0x2258
+#define MIC_X100_PCI_DEVICE_2259 0x2259
+#define MIC_X100_PCI_DEVICE_225a 0x225a
+#define MIC_X100_PCI_DEVICE_225b 0x225b
+#define MIC_X100_PCI_DEVICE_225c 0x225c
+#define MIC_X100_PCI_DEVICE_225d 0x225d
+#define MIC_X100_PCI_DEVICE_225e 0x225e
+
+#define MIC_X100_APER_BAR 0
+#define MIC_X100_MMIO_BAR 4
+
+#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000
+#define MIC_X100_SBOX_SPAD0 0x0000AB20
+#define MIC_X100_SBOX_SICR0_DBR(x) ((x) & 0xf)
+#define MIC_X100_SBOX_SICR0_DMA(x) (((x) >> 8) & 0xff)
+#define MIC_X100_SBOX_SICE0_DBR(x) ((x) & 0xf)
+#define MIC_X100_SBOX_DBR_BITS(x) ((x) & 0xf)
+#define MIC_X100_SBOX_SICE0_DMA(x) (((x) >> 8) & 0xff)
+#define MIC_X100_SBOX_DMA_BITS(x) (((x) & 0xff) << 8)
+
+#define MIC_X100_SBOX_APICICR0 0x0000A9D0
+#define MIC_X100_SBOX_SICR0 0x00009004
+#define MIC_X100_SBOX_SICE0 0x0000900C
+#define MIC_X100_SBOX_SICC0 0x00009010
+#define MIC_X100_SBOX_SIAC0 0x00009014
+#define MIC_X100_SBOX_MSIXPBACR 0x00009084
+#define MIC_X100_SBOX_MXAR0 0x00009044
+#define MIC_X100_SBOX_SMPT00 0x00003100
+#define MIC_X100_SBOX_RDMASR0 0x0000B180
+
+#define MIC_X100_DOORBELL_IDX_START 0
+#define MIC_X100_NUM_DOORBELL 4
+#define MIC_X100_DMA_IDX_START 8
+#define MIC_X100_NUM_DMA 8
+#define MIC_X100_ERR_IDX_START 30
+#define MIC_X100_NUM_ERR 1
+
+#define MIC_X100_NUM_SBOX_IRQ 8
+#define MIC_X100_NUM_RDMASR_IRQ 8
+#define MIC_X100_RDMASR_IRQ_BASE 17
+#define MIC_X100_SPAD2_DOWNLOAD_STATUS(x) ((x) & 0x1)
+#define MIC_X100_SPAD2_APIC_ID(x) (((x) >> 1) & 0x1ff)
+#define MIC_X100_SPAD2_DOWNLOAD_ADDR(x) ((x) & 0xfffff000)
+#define MIC_X100_SBOX_APICICR7 0x0000AA08
+#define MIC_X100_SBOX_RGCR 0x00004010
+#define MIC_X100_SBOX_SDBIC0 0x0000CC90
+#define MIC_X100_DOWNLOAD_INFO 2
+#define MIC_X100_FW_SIZE 5
+#define MIC_X100_POSTCODE 0x242c
+
+static const u16 mic_x100_intr_init[] = {
+ MIC_X100_DOORBELL_IDX_START,
+ MIC_X100_DMA_IDX_START,
+ MIC_X100_ERR_IDX_START,
+ MIC_X100_NUM_DOORBELL,
+ MIC_X100_NUM_DMA,
+ MIC_X100_NUM_ERR,
+};
+
+/* Host->Card(bootstrap) Interrupt Vector */
+#define MIC_X100_BSP_INTERRUPT_VECTOR 229
+
+extern struct mic_hw_ops mic_x100_ops;
+extern struct mic_smpt_ops mic_x100_smpt_ops;
+extern struct mic_hw_intr_ops mic_x100_intr_ops;
+
+#endif