493 lines
12 KiB
C
493 lines
12 KiB
C
/*******************************************************************************
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AudioScience HPI driver
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Copyright (C) 1997-2010 AudioScience Inc. <support@audioscience.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation;
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Common Linux HPI ioctl and module probe/remove functions
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*******************************************************************************/
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#define SOURCEFILE_NAME "hpioctl.c"
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#include "hpi_internal.h"
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#include "hpimsginit.h"
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#include "hpidebug.h"
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#include "hpimsgx.h"
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#include "hpioctl.h"
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#include "hpicmn.h"
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/moduleparam.h>
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#include <asm/uaccess.h>
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#include <linux/pci.h>
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#include <linux/stringify.h>
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#ifdef MODULE_FIRMWARE
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MODULE_FIRMWARE("asihpi/dsp5000.bin");
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MODULE_FIRMWARE("asihpi/dsp6200.bin");
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MODULE_FIRMWARE("asihpi/dsp6205.bin");
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MODULE_FIRMWARE("asihpi/dsp6400.bin");
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MODULE_FIRMWARE("asihpi/dsp6600.bin");
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MODULE_FIRMWARE("asihpi/dsp8700.bin");
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MODULE_FIRMWARE("asihpi/dsp8900.bin");
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#endif
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static int prealloc_stream_buf;
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module_param(prealloc_stream_buf, int, S_IRUGO);
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MODULE_PARM_DESC(prealloc_stream_buf,
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"Preallocate size for per-adapter stream buffer");
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/* Allow the debug level to be changed after module load.
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E.g. echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
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*/
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module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
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/* List of adapters found */
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static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
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/* Wrapper function to HPI_Message to enable dumping of the
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message and response types.
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*/
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static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
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struct file *file)
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{
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int adapter = phm->adapter_index;
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if ((adapter >= HPI_MAX_ADAPTERS || adapter < 0)
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&& (phm->object != HPI_OBJ_SUBSYSTEM))
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phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
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else
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hpi_send_recv_ex(phm, phr, file);
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}
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/* This is called from hpifunc.c functions, called by ALSA
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* (or other kernel process) In this case there is no file descriptor
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* available for the message cache code
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*/
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void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
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{
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hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
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}
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EXPORT_SYMBOL(hpi_send_recv);
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/* for radio-asihpi */
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int asihpi_hpi_release(struct file *file)
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{
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struct hpi_message hm;
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struct hpi_response hr;
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/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
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/* close the subsystem just in case the application forgot to. */
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hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
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HPI_SUBSYS_CLOSE);
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hpi_send_recv_ex(&hm, &hr, file);
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return 0;
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}
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long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct hpi_ioctl_linux __user *phpi_ioctl_data;
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void __user *puhm;
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void __user *puhr;
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union hpi_message_buffer_v1 *hm;
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union hpi_response_buffer_v1 *hr;
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u16 res_max_size;
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u32 uncopied_bytes;
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struct hpi_adapter *pa = NULL;
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int err = 0;
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if (cmd != HPI_IOCTL_LINUX)
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return -EINVAL;
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hm = kmalloc(sizeof(*hm), GFP_KERNEL);
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hr = kmalloc(sizeof(*hr), GFP_KERNEL);
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if (!hm || !hr) {
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err = -ENOMEM;
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goto out;
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}
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phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
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/* Read the message and response pointers from user space. */
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if (get_user(puhm, &phpi_ioctl_data->phm)
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|| get_user(puhr, &phpi_ioctl_data->phr)) {
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err = -EFAULT;
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goto out;
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}
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/* Now read the message size and data from user space. */
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if (get_user(hm->h.size, (u16 __user *)puhm)) {
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err = -EFAULT;
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goto out;
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}
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if (hm->h.size > sizeof(*hm))
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hm->h.size = sizeof(*hm);
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/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
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uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
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if (uncopied_bytes) {
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HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
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err = -EFAULT;
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goto out;
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}
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if (get_user(res_max_size, (u16 __user *)puhr)) {
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err = -EFAULT;
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goto out;
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}
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/* printk(KERN_INFO "user response size %d\n", res_max_size); */
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if (res_max_size < sizeof(struct hpi_response_header)) {
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HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
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err = -EFAULT;
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goto out;
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}
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if (hm->h.adapter_index >= HPI_MAX_ADAPTERS) {
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err = -EINVAL;
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goto out;
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}
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switch (hm->h.function) {
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case HPI_SUBSYS_CREATE_ADAPTER:
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case HPI_ADAPTER_DELETE:
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/* Application must not use these functions! */
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hr->h.size = sizeof(hr->h);
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hr->h.error = HPI_ERROR_INVALID_OPERATION;
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hr->h.function = hm->h.function;
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uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
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if (uncopied_bytes)
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err = -EFAULT;
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else
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err = 0;
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goto out;
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}
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hr->h.size = res_max_size;
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if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
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hpi_send_recv_f(&hm->m0, &hr->r0, file);
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} else {
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u16 __user *ptr = NULL;
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u32 size = 0;
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/* -1=no data 0=read from user mem, 1=write to user mem */
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int wrflag = -1;
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u32 adapter = hm->h.adapter_index;
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pa = &adapters[adapter];
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if ((adapter > HPI_MAX_ADAPTERS) || (!pa->type)) {
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hpi_init_response(&hr->r0, HPI_OBJ_ADAPTER,
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HPI_ADAPTER_OPEN,
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HPI_ERROR_BAD_ADAPTER_NUMBER);
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uncopied_bytes =
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copy_to_user(puhr, hr, sizeof(hr->h));
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if (uncopied_bytes)
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err = -EFAULT;
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else
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err = 0;
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goto out;
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}
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if (mutex_lock_interruptible(&adapters[adapter].mutex)) {
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err = -EINTR;
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goto out;
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}
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/* Dig out any pointers embedded in the message. */
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switch (hm->h.function) {
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case HPI_OSTREAM_WRITE:
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case HPI_ISTREAM_READ:{
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/* Yes, sparse, this is correct. */
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ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
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size = hm->m0.u.d.u.data.data_size;
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/* Allocate buffer according to application request.
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?Is it better to alloc/free for the duration
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of the transaction?
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*/
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if (pa->buffer_size < size) {
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HPI_DEBUG_LOG(DEBUG,
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"Realloc adapter %d stream "
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"buffer from %zd to %d\n",
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hm->h.adapter_index,
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pa->buffer_size, size);
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if (pa->p_buffer) {
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pa->buffer_size = 0;
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vfree(pa->p_buffer);
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}
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pa->p_buffer = vmalloc(size);
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if (pa->p_buffer)
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pa->buffer_size = size;
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else {
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HPI_DEBUG_LOG(ERROR,
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"HPI could not allocate "
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"stream buffer size %d\n",
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size);
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mutex_unlock(&adapters
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[adapter].mutex);
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err = -EINVAL;
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goto out;
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}
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}
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hm->m0.u.d.u.data.pb_data = pa->p_buffer;
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if (hm->h.function == HPI_ISTREAM_READ)
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/* from card, WRITE to user mem */
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wrflag = 1;
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else
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wrflag = 0;
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break;
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}
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default:
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size = 0;
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break;
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}
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if (size && (wrflag == 0)) {
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uncopied_bytes =
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copy_from_user(pa->p_buffer, ptr, size);
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if (uncopied_bytes)
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HPI_DEBUG_LOG(WARNING,
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"Missed %d of %d "
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"bytes from user\n", uncopied_bytes,
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size);
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}
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hpi_send_recv_f(&hm->m0, &hr->r0, file);
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if (size && (wrflag == 1)) {
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uncopied_bytes =
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copy_to_user(ptr, pa->p_buffer, size);
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if (uncopied_bytes)
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HPI_DEBUG_LOG(WARNING,
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"Missed %d of %d " "bytes to user\n",
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uncopied_bytes, size);
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}
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mutex_unlock(&adapters[adapter].mutex);
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}
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/* on return response size must be set */
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/*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
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if (!hr->h.size) {
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HPI_DEBUG_LOG(ERROR, "response zero size\n");
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err = -EFAULT;
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goto out;
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}
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if (hr->h.size > res_max_size) {
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HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
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res_max_size);
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hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
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hr->h.specific_error = hr->h.size;
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hr->h.size = sizeof(hr->h);
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}
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uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
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if (uncopied_bytes) {
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HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
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err = -EFAULT;
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goto out;
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}
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out:
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kfree(hm);
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kfree(hr);
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return err;
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}
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int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
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const struct pci_device_id *pci_id)
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{
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int idx, nm;
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unsigned int memlen;
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struct hpi_message hm;
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struct hpi_response hr;
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struct hpi_adapter adapter;
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struct hpi_pci pci;
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memset(&adapter, 0, sizeof(adapter));
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dev_printk(KERN_DEBUG, &pci_dev->dev,
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"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
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pci_dev->device, pci_dev->subsystem_vendor,
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pci_dev->subsystem_device, pci_dev->devfn);
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if (pci_enable_device(pci_dev) < 0) {
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dev_printk(KERN_ERR, &pci_dev->dev,
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"pci_enable_device failed, disabling device\n");
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return -EIO;
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}
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pci_set_master(pci_dev); /* also sets latency timer if < 16 */
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hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
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HPI_SUBSYS_CREATE_ADAPTER);
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hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
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HPI_ERROR_PROCESSING_MESSAGE);
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hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
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adapter.pci = pci_dev;
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nm = HPI_MAX_ADAPTER_MEM_SPACES;
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for (idx = 0; idx < nm; idx++) {
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HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
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&pci_dev->resource[idx]);
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if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
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memlen = pci_resource_len(pci_dev, idx);
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adapter.ap_remapped_mem_base[idx] =
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ioremap(pci_resource_start(pci_dev, idx),
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memlen);
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if (!adapter.ap_remapped_mem_base[idx]) {
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HPI_DEBUG_LOG(ERROR,
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"ioremap failed, aborting\n");
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/* unmap previously mapped pci mem space */
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goto err;
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}
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}
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pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
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}
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pci.pci_dev = pci_dev;
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hm.u.s.resource.bus_type = HPI_BUS_PCI;
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hm.u.s.resource.r.pci = &pci;
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/* call CreateAdapterObject on the relevant hpi module */
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hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
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if (hr.error)
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goto err;
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if (prealloc_stream_buf) {
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adapter.p_buffer = vmalloc(prealloc_stream_buf);
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if (!adapter.p_buffer) {
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HPI_DEBUG_LOG(ERROR,
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"HPI could not allocate "
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"kernel buffer size %d\n",
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prealloc_stream_buf);
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goto err;
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}
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}
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adapter.index = hr.u.s.adapter_index;
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adapter.type = hr.u.s.adapter_type;
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hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
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HPI_ADAPTER_OPEN);
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hm.adapter_index = adapter.index;
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hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
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if (hr.error)
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goto err;
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adapter.snd_card_asihpi = NULL;
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/* WARNING can't init mutex in 'adapter'
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* and then copy it to adapters[] ?!?!
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*/
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adapters[adapter.index] = adapter;
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mutex_init(&adapters[adapter.index].mutex);
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pci_set_drvdata(pci_dev, &adapters[adapter.index]);
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dev_printk(KERN_INFO, &pci_dev->dev,
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"probe succeeded for ASI%04X HPI index %d\n", adapter.type,
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adapter.index);
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return 0;
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err:
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for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
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if (adapter.ap_remapped_mem_base[idx]) {
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iounmap(adapter.ap_remapped_mem_base[idx]);
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adapter.ap_remapped_mem_base[idx] = NULL;
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}
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}
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if (adapter.p_buffer) {
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adapter.buffer_size = 0;
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vfree(adapter.p_buffer);
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}
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HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
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return -ENODEV;
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}
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void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
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{
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int idx;
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struct hpi_message hm;
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struct hpi_response hr;
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struct hpi_adapter *pa;
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pa = pci_get_drvdata(pci_dev);
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hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
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HPI_ADAPTER_DELETE);
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hm.adapter_index = pa->index;
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hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
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/* unmap PCI memory space, mapped during device init. */
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for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
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if (pa->ap_remapped_mem_base[idx]) {
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iounmap(pa->ap_remapped_mem_base[idx]);
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pa->ap_remapped_mem_base[idx] = NULL;
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}
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}
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if (pa->p_buffer)
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vfree(pa->p_buffer);
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pci_set_drvdata(pci_dev, NULL);
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if (1)
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dev_printk(KERN_INFO, &pci_dev->dev,
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"remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
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pci_dev->vendor, pci_dev->device,
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pci_dev->subsystem_vendor, pci_dev->subsystem_device,
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pci_dev->devfn, pa->index);
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memset(pa, 0, sizeof(*pa));
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}
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void __init asihpi_init(void)
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{
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struct hpi_message hm;
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struct hpi_response hr;
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memset(adapters, 0, sizeof(adapters));
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printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
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hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
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HPI_SUBSYS_DRIVER_LOAD);
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hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
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}
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void asihpi_exit(void)
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{
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struct hpi_message hm;
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struct hpi_response hr;
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hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
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HPI_SUBSYS_DRIVER_UNLOAD);
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hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
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}
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