| /* arch/arm/mach-msm/qdsp5/adsp_driver.c |
| * |
| * Copyright (C) 2008 Google, Inc. |
| * Author: Iliyan Malchev <ibm@android.com> |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * 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. |
| * |
| */ |
| |
| #include <linux/cdev.h> |
| #include <linux/fs.h> |
| #include <linux/list.h> |
| #include <linux/platform_device.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| |
| #include "adsp.h" |
| |
| #include <linux/msm_adsp.h> |
| #include <linux/android_pmem.h> |
| |
| struct adsp_pmem_region { |
| struct hlist_node list; |
| void *vaddr; |
| unsigned long paddr; |
| unsigned long kvaddr; |
| unsigned long len; |
| struct file *file; |
| }; |
| |
| struct adsp_device { |
| struct msm_adsp_module *module; |
| |
| spinlock_t event_queue_lock; |
| wait_queue_head_t event_wait; |
| struct list_head event_queue; |
| int abort; |
| |
| const char *name; |
| struct device *device; |
| struct cdev cdev; |
| }; |
| |
| static struct adsp_device *inode_to_device(struct inode *inode); |
| |
| #define __CONTAINS(r, v, l) ({ \ |
| typeof(r) __r = r; \ |
| typeof(v) __v = v; \ |
| typeof(v) __e = __v + l; \ |
| int res = __v >= __r->vaddr && \ |
| __e <= __r->vaddr + __r->len; \ |
| res; \ |
| }) |
| |
| #define CONTAINS(r1, r2) ({ \ |
| typeof(r2) __r2 = r2; \ |
| __CONTAINS(r1, __r2->vaddr, __r2->len); \ |
| }) |
| |
| #define IN_RANGE(r, v) ({ \ |
| typeof(r) __r = r; \ |
| typeof(v) __vv = v; \ |
| int res = ((__vv >= __r->vaddr) && \ |
| (__vv < (__r->vaddr + __r->len))); \ |
| res; \ |
| }) |
| |
| #define OVERLAPS(r1, r2) ({ \ |
| typeof(r1) __r1 = r1; \ |
| typeof(r2) __r2 = r2; \ |
| typeof(__r2->vaddr) __v = __r2->vaddr; \ |
| typeof(__v) __e = __v + __r2->len - 1; \ |
| int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \ |
| res; \ |
| }) |
| |
| static int adsp_pmem_check(struct msm_adsp_module *module, |
| void *vaddr, unsigned long len) |
| { |
| struct adsp_pmem_region *region_elt; |
| struct hlist_node *node; |
| struct adsp_pmem_region t = { .vaddr = vaddr, .len = len }; |
| |
| hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) || |
| OVERLAPS(region_elt, &t)) { |
| printk(KERN_ERR "adsp: module %s:" |
| " region (vaddr %p len %ld)" |
| " clashes with registered region" |
| " (vaddr %p paddr %p len %ld)\n", |
| module->name, |
| vaddr, len, |
| region_elt->vaddr, |
| (void *)region_elt->paddr, |
| region_elt->len); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int adsp_pmem_add(struct msm_adsp_module *module, |
| struct adsp_pmem_info *info) |
| { |
| unsigned long paddr, kvaddr, len; |
| struct file *file; |
| struct adsp_pmem_region *region; |
| int rc = -EINVAL; |
| |
| mutex_lock(&module->pmem_regions_lock); |
| region = kmalloc(sizeof(*region), GFP_KERNEL); |
| if (!region) { |
| rc = -ENOMEM; |
| goto end; |
| } |
| INIT_HLIST_NODE(®ion->list); |
| if (get_pmem_file(info->fd, &paddr, &kvaddr, &len, &file)) { |
| kfree(region); |
| goto end; |
| } |
| |
| rc = adsp_pmem_check(module, info->vaddr, len); |
| if (rc < 0) { |
| put_pmem_file(file); |
| kfree(region); |
| goto end; |
| } |
| |
| region->vaddr = info->vaddr; |
| region->paddr = paddr; |
| region->kvaddr = kvaddr; |
| region->len = len; |
| region->file = file; |
| |
| hlist_add_head(®ion->list, &module->pmem_regions); |
| end: |
| mutex_unlock(&module->pmem_regions_lock); |
| return rc; |
| } |
| |
| static int adsp_pmem_lookup_vaddr(struct msm_adsp_module *module, void **addr, |
| unsigned long len, struct adsp_pmem_region **region) |
| { |
| struct hlist_node *node; |
| void *vaddr = *addr; |
| struct adsp_pmem_region *region_elt; |
| |
| int match_count = 0; |
| |
| *region = NULL; |
| |
| /* returns physical address or zero */ |
| hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| if (vaddr >= region_elt->vaddr && |
| vaddr < region_elt->vaddr + region_elt->len && |
| vaddr + len <= region_elt->vaddr + region_elt->len) { |
| /* offset since we could pass vaddr inside a registerd |
| * pmem buffer |
| */ |
| |
| match_count++; |
| if (!*region) |
| *region = region_elt; |
| } |
| } |
| |
| if (match_count > 1) { |
| printk(KERN_ERR "adsp: module %s: " |
| "multiple hits for vaddr %p, len %ld\n", |
| module->name, vaddr, len); |
| hlist_for_each_entry(region_elt, node, |
| &module->pmem_regions, list) { |
| if (vaddr >= region_elt->vaddr && |
| vaddr < region_elt->vaddr + region_elt->len && |
| vaddr + len <= region_elt->vaddr + region_elt->len) |
| printk(KERN_ERR "\t%p, %ld --> %p\n", |
| region_elt->vaddr, |
| region_elt->len, |
| (void *)region_elt->paddr); |
| } |
| } |
| |
| return *region ? 0 : -1; |
| } |
| |
| int adsp_pmem_fixup_kvaddr(struct msm_adsp_module *module, void **addr, |
| unsigned long *kvaddr, unsigned long len) |
| { |
| struct adsp_pmem_region *region; |
| void *vaddr = *addr; |
| unsigned long *paddr = (unsigned long *)addr; |
| int ret; |
| |
| ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); |
| if (ret) { |
| printk(KERN_ERR "adsp: not patching %s (paddr & kvaddr)," |
| " lookup (%p, %ld) failed\n", |
| module->name, vaddr, len); |
| return ret; |
| } |
| *paddr = region->paddr + (vaddr - region->vaddr); |
| *kvaddr = region->kvaddr + (vaddr - region->vaddr); |
| return 0; |
| } |
| |
| int adsp_pmem_fixup(struct msm_adsp_module *module, void **addr, |
| unsigned long len) |
| { |
| struct adsp_pmem_region *region; |
| void *vaddr = *addr; |
| unsigned long *paddr = (unsigned long *)addr; |
| int ret; |
| |
| ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); |
| if (ret) { |
| printk(KERN_ERR "adsp: not patching %s, lookup (%p, %ld) failed\n", |
| module->name, vaddr, len); |
| return ret; |
| } |
| |
| *paddr = region->paddr + (vaddr - region->vaddr); |
| return 0; |
| } |
| |
| static int adsp_verify_cmd(struct msm_adsp_module *module, |
| unsigned int queue_id, void *cmd_data, |
| size_t cmd_size) |
| { |
| /* call the per module verifier */ |
| if (module->verify_cmd) |
| return module->verify_cmd(module, queue_id, cmd_data, |
| cmd_size); |
| else |
| printk(KERN_INFO "adsp: no packet verifying function " |
| "for task %s\n", module->name); |
| return 0; |
| } |
| |
| static long adsp_write_cmd(struct adsp_device *adev, void __user *arg) |
| { |
| struct adsp_command_t cmd; |
| unsigned char buf[256]; |
| void *cmd_data; |
| long rc; |
| |
| if (copy_from_user(&cmd, (void __user *)arg, sizeof(cmd))) |
| return -EFAULT; |
| |
| if (cmd.len > 256) { |
| cmd_data = kmalloc(cmd.len, GFP_USER); |
| if (!cmd_data) |
| return -ENOMEM; |
| } else { |
| cmd_data = buf; |
| } |
| |
| if (copy_from_user(cmd_data, (void __user *)(cmd.data), cmd.len)) { |
| rc = -EFAULT; |
| goto end; |
| } |
| |
| mutex_lock(&adev->module->pmem_regions_lock); |
| if (adsp_verify_cmd(adev->module, cmd.queue, cmd_data, cmd.len)) { |
| printk(KERN_ERR "module %s: verify failed.\n", |
| adev->module->name); |
| rc = -EINVAL; |
| goto end; |
| } |
| rc = msm_adsp_write(adev->module, cmd.queue, cmd_data, cmd.len); |
| end: |
| mutex_unlock(&adev->module->pmem_regions_lock); |
| |
| if (cmd.len > 256) |
| kfree(cmd_data); |
| |
| return rc; |
| } |
| |
| static int adsp_events_pending(struct adsp_device *adev) |
| { |
| unsigned long flags; |
| int yes; |
| spin_lock_irqsave(&adev->event_queue_lock, flags); |
| yes = !list_empty(&adev->event_queue); |
| spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| return yes || adev->abort; |
| } |
| |
| static int adsp_pmem_lookup_paddr(struct msm_adsp_module *module, void **addr, |
| struct adsp_pmem_region **region) |
| { |
| struct hlist_node *node; |
| unsigned long paddr = (unsigned long)(*addr); |
| struct adsp_pmem_region *region_elt; |
| |
| hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| if (paddr >= region_elt->paddr && |
| paddr < region_elt->paddr + region_elt->len) { |
| *region = region_elt; |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| int adsp_pmem_paddr_fixup(struct msm_adsp_module *module, void **addr) |
| { |
| struct adsp_pmem_region *region; |
| unsigned long paddr = (unsigned long)(*addr); |
| unsigned long *vaddr = (unsigned long *)addr; |
| int ret; |
| |
| ret = adsp_pmem_lookup_paddr(module, addr, ®ion); |
| if (ret) { |
| printk(KERN_ERR "adsp: not patching %s, paddr %p lookup failed\n", |
| module->name, vaddr); |
| return ret; |
| } |
| |
| *vaddr = (unsigned long)region->vaddr + (paddr - region->paddr); |
| return 0; |
| } |
| |
| static int adsp_patch_event(struct msm_adsp_module *module, |
| struct adsp_event *event) |
| { |
| /* call the per-module msg verifier */ |
| if (module->patch_event) |
| return module->patch_event(module, event); |
| return 0; |
| } |
| |
| static long adsp_get_event(struct adsp_device *adev, void __user *arg) |
| { |
| unsigned long flags; |
| struct adsp_event *data = NULL; |
| struct adsp_event_t evt; |
| int timeout; |
| long rc = 0; |
| |
| if (copy_from_user(&evt, arg, sizeof(struct adsp_event_t))) |
| return -EFAULT; |
| |
| timeout = (int)evt.timeout_ms; |
| |
| if (timeout > 0) { |
| rc = wait_event_interruptible_timeout( |
| adev->event_wait, adsp_events_pending(adev), |
| msecs_to_jiffies(timeout)); |
| if (rc == 0) |
| return -ETIMEDOUT; |
| } else { |
| rc = wait_event_interruptible( |
| adev->event_wait, adsp_events_pending(adev)); |
| } |
| if (rc < 0) |
| return rc; |
| |
| if (adev->abort) |
| return -ENODEV; |
| |
| spin_lock_irqsave(&adev->event_queue_lock, flags); |
| if (!list_empty(&adev->event_queue)) { |
| data = list_first_entry(&adev->event_queue, |
| struct adsp_event, list); |
| list_del(&data->list); |
| } |
| spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| |
| if (!data) |
| return -EAGAIN; |
| |
| /* DSP messages are type 0; they may contain physical addresses */ |
| if (data->type == 0) |
| adsp_patch_event(adev->module, data); |
| |
| /* map adsp_event --> adsp_event_t */ |
| if (evt.len < data->size) { |
| rc = -ETOOSMALL; |
| goto end; |
| } |
| if (data->msg_id != EVENT_MSG_ID) { |
| if (copy_to_user((void *)(evt.data), data->data.msg16, |
| data->size)) { |
| rc = -EFAULT; |
| goto end; |
| } |
| } else { |
| if (copy_to_user((void *)(evt.data), data->data.msg32, |
| data->size)) { |
| rc = -EFAULT; |
| goto end; |
| } |
| } |
| |
| evt.type = data->type; /* 0 --> from aDSP, 1 --> from ARM9 */ |
| evt.msg_id = data->msg_id; |
| evt.flags = data->is16; |
| evt.len = data->size; |
| if (copy_to_user(arg, &evt, sizeof(evt))) |
| rc = -EFAULT; |
| end: |
| kfree(data); |
| return rc; |
| } |
| |
| static long adsp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| struct adsp_device *adev = filp->private_data; |
| |
| switch (cmd) { |
| case ADSP_IOCTL_ENABLE: |
| return msm_adsp_enable(adev->module); |
| |
| case ADSP_IOCTL_DISABLE: |
| return msm_adsp_disable(adev->module); |
| |
| case ADSP_IOCTL_DISABLE_EVENT_RSP: |
| return 0; |
| |
| case ADSP_IOCTL_DISABLE_ACK: |
| pr_err("adsp: ADSP_IOCTL_DISABLE_ACK is not implemented.\n"); |
| break; |
| |
| case ADSP_IOCTL_WRITE_COMMAND: |
| return adsp_write_cmd(adev, (void __user *) arg); |
| |
| case ADSP_IOCTL_GET_EVENT: |
| return adsp_get_event(adev, (void __user *) arg); |
| |
| case ADSP_IOCTL_SET_CLKRATE: { |
| #if CONFIG_MSM_AMSS_VERSION==6350 |
| unsigned long clk_rate; |
| if (copy_from_user(&clk_rate, (void *) arg, sizeof(clk_rate))) |
| return -EFAULT; |
| return adsp_set_clkrate(adev->module, clk_rate); |
| #endif |
| } |
| |
| case ADSP_IOCTL_REGISTER_PMEM: { |
| struct adsp_pmem_info info; |
| if (copy_from_user(&info, (void *) arg, sizeof(info))) |
| return -EFAULT; |
| return adsp_pmem_add(adev->module, &info); |
| } |
| |
| case ADSP_IOCTL_ABORT_EVENT_READ: |
| adev->abort = 1; |
| wake_up(&adev->event_wait); |
| break; |
| |
| default: |
| break; |
| } |
| return -EINVAL; |
| } |
| |
| static int adsp_release(struct inode *inode, struct file *filp) |
| { |
| struct adsp_device *adev = filp->private_data; |
| struct msm_adsp_module *module = adev->module; |
| struct hlist_node *node, *tmp; |
| struct adsp_pmem_region *region; |
| |
| pr_info("adsp_release() '%s'\n", adev->name); |
| |
| /* clear module before putting it to avoid race with open() */ |
| adev->module = NULL; |
| |
| mutex_lock(&module->pmem_regions_lock); |
| hlist_for_each_safe(node, tmp, &module->pmem_regions) { |
| region = hlist_entry(node, struct adsp_pmem_region, list); |
| hlist_del(node); |
| put_pmem_file(region->file); |
| kfree(region); |
| } |
| mutex_unlock(&module->pmem_regions_lock); |
| BUG_ON(!hlist_empty(&module->pmem_regions)); |
| |
| msm_adsp_put(module); |
| return 0; |
| } |
| |
| static void adsp_event(void *driver_data, unsigned id, size_t len, |
| void (*getevent)(void *ptr, size_t len)) |
| { |
| struct adsp_device *adev = driver_data; |
| struct adsp_event *event; |
| unsigned long flags; |
| |
| if (len > ADSP_EVENT_MAX_SIZE) { |
| pr_err("adsp_event: event too large (%d bytes)\n", len); |
| return; |
| } |
| |
| event = kmalloc(sizeof(*event), GFP_ATOMIC); |
| if (!event) { |
| pr_err("adsp_event: cannot allocate buffer\n"); |
| return; |
| } |
| |
| if (id != EVENT_MSG_ID) { |
| event->type = 0; |
| event->is16 = 0; |
| event->msg_id = id; |
| event->size = len; |
| |
| getevent(event->data.msg16, len); |
| } else { |
| event->type = 1; |
| event->is16 = 1; |
| event->msg_id = id; |
| event->size = len; |
| getevent(event->data.msg32, len); |
| } |
| |
| spin_lock_irqsave(&adev->event_queue_lock, flags); |
| list_add_tail(&event->list, &adev->event_queue); |
| spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| wake_up(&adev->event_wait); |
| } |
| |
| static struct msm_adsp_ops adsp_ops = { |
| .event = adsp_event, |
| }; |
| |
| static int adsp_open(struct inode *inode, struct file *filp) |
| { |
| struct adsp_device *adev; |
| int rc; |
| |
| rc = nonseekable_open(inode, filp); |
| if (rc < 0) |
| return rc; |
| |
| adev = inode_to_device(inode); |
| if (!adev) |
| return -ENODEV; |
| |
| pr_info("adsp_open() name = '%s'\n", adev->name); |
| |
| rc = msm_adsp_get(adev->name, &adev->module, &adsp_ops, adev); |
| if (rc) |
| return rc; |
| |
| pr_info("adsp_open() module '%s' adev %p\n", adev->name, adev); |
| filp->private_data = adev; |
| adev->abort = 0; |
| INIT_HLIST_HEAD(&adev->module->pmem_regions); |
| mutex_init(&adev->module->pmem_regions_lock); |
| |
| return 0; |
| } |
| |
| static unsigned adsp_device_count; |
| static struct adsp_device *adsp_devices; |
| |
| static struct adsp_device *inode_to_device(struct inode *inode) |
| { |
| unsigned n = MINOR(inode->i_rdev); |
| if (n < adsp_device_count) { |
| if (adsp_devices[n].device) |
| return adsp_devices + n; |
| } |
| return NULL; |
| } |
| |
| static dev_t adsp_devno; |
| static struct class *adsp_class; |
| |
| static struct file_operations adsp_fops = { |
| .owner = THIS_MODULE, |
| .open = adsp_open, |
| .unlocked_ioctl = adsp_ioctl, |
| .release = adsp_release, |
| .llseek = no_llseek, |
| }; |
| |
| static void adsp_create(struct adsp_device *adev, const char *name, |
| struct device *parent, dev_t devt) |
| { |
| struct device *dev; |
| int rc; |
| |
| dev = device_create(adsp_class, parent, devt, "%s", name); |
| if (IS_ERR(dev)) |
| return; |
| |
| init_waitqueue_head(&adev->event_wait); |
| INIT_LIST_HEAD(&adev->event_queue); |
| spin_lock_init(&adev->event_queue_lock); |
| |
| cdev_init(&adev->cdev, &adsp_fops); |
| adev->cdev.owner = THIS_MODULE; |
| |
| rc = cdev_add(&adev->cdev, devt, 1); |
| if (rc < 0) { |
| device_destroy(adsp_class, devt); |
| } else { |
| adev->device = dev; |
| adev->name = name; |
| } |
| } |
| |
| void msm_adsp_publish_cdevs(struct msm_adsp_module *modules, unsigned n) |
| { |
| int rc; |
| |
| adsp_devices = kzalloc(sizeof(struct adsp_device) * n, GFP_KERNEL); |
| if (!adsp_devices) |
| return; |
| |
| adsp_class = class_create(THIS_MODULE, "adsp"); |
| if (IS_ERR(adsp_class)) |
| goto fail_create_class; |
| |
| rc = alloc_chrdev_region(&adsp_devno, 0, n, "adsp"); |
| if (rc < 0) |
| goto fail_alloc_region; |
| |
| adsp_device_count = n; |
| for (n = 0; n < adsp_device_count; n++) { |
| adsp_create(adsp_devices + n, |
| modules[n].name, &modules[n].pdev.dev, |
| MKDEV(MAJOR(adsp_devno), n)); |
| } |
| |
| return; |
| |
| fail_alloc_region: |
| class_unregister(adsp_class); |
| fail_create_class: |
| kfree(adsp_devices); |
| } |