[deliverable/linux.git] / sound / pci / asihpi / hpioctl.c

/*******************************************************************************
    AudioScience HPI driver
    Common Linux HPI ioctl and module probe/remove functions

    Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License 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.

*******************************************************************************/
#define SOURCEFILE_NAME "hpioctl.c"

#include "hpi_internal.h"
#include "hpi_version.h"
#include "hpimsginit.h"
#include "hpidebug.h"
#include "hpimsgx.h"
#include "hpioctl.h"
#include "hpicmn.h"

#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/uaccess.h>
#include <linux/pci.h>
#include <linux/stringify.h>
#include <linux/module.h>
#include <linux/vmalloc.h>

#ifdef MODULE_FIRMWARE
MODULE_FIRMWARE("asihpi/dsp5000.bin");
MODULE_FIRMWARE("asihpi/dsp6200.bin");
MODULE_FIRMWARE("asihpi/dsp6205.bin");
MODULE_FIRMWARE("asihpi/dsp6400.bin");
MODULE_FIRMWARE("asihpi/dsp6600.bin");
MODULE_FIRMWARE("asihpi/dsp8700.bin");
MODULE_FIRMWARE("asihpi/dsp8900.bin");
#endif

static int prealloc_stream_buf;
module_param(prealloc_stream_buf, int, S_IRUGO);
MODULE_PARM_DESC(prealloc_stream_buf,
	"Preallocate size for per-adapter stream buffer");

/* Allow the debug level to be changed after module load.
 E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
*/
module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");

/* List of adapters found */
static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];

/* Wrapper function to HPI_Message to enable dumping of the
   message and response types.
*/
static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
	struct file *file)
{
	if ((phm->adapter_index >= HPI_MAX_ADAPTERS)
		&& (phm->object != HPI_OBJ_SUBSYSTEM))
		phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
	else
		hpi_send_recv_ex(phm, phr, file);
}

/* This is called from hpifunc.c functions, called by ALSA
 * (or other kernel process) In this case there is no file descriptor
 * available for the message cache code
 */
void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
{
	hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
}

EXPORT_SYMBOL(hpi_send_recv);
/* for radio-asihpi */

int asihpi_hpi_release(struct file *file)
{
	struct hpi_message hm;
	struct hpi_response hr;

/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
	/* close the subsystem just in case the application forgot to. */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CLOSE);
	hpi_send_recv_ex(&hm, &hr, file);
	return 0;
}

long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct hpi_ioctl_linux __user *phpi_ioctl_data;
	void __user *puhm;
	void __user *puhr;
	union hpi_message_buffer_v1 *hm;
	union hpi_response_buffer_v1 *hr;
	u16 res_max_size;
	u32 uncopied_bytes;
	int err = 0;

	if (cmd != HPI_IOCTL_LINUX)
		return -EINVAL;

	hm = kmalloc(sizeof(*hm), GFP_KERNEL);
	hr = kmalloc(sizeof(*hr), GFP_KERNEL);
	if (!hm || !hr) {
		err = -ENOMEM;
		goto out;
	}

	phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;

	/* Read the message and response pointers from user space.  */
	if (get_user(puhm, &phpi_ioctl_data->phm)
		|| get_user(puhr, &phpi_ioctl_data->phr)) {
		err = -EFAULT;
		goto out;
	}

	/* Now read the message size and data from user space.  */
	if (get_user(hm->h.size, (u16 __user *)puhm)) {
		err = -EFAULT;
		goto out;
	}
	if (hm->h.size > sizeof(*hm))
		hm->h.size = sizeof(*hm);

	/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */

	uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

	if (get_user(res_max_size, (u16 __user *)puhr)) {
		err = -EFAULT;
		goto out;
	}
	/* printk(KERN_INFO "user response size %d\n", res_max_size); */
	if (res_max_size < sizeof(struct hpi_response_header)) {
		HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
		err = -EFAULT;
		goto out;
	}

	res_max_size = min_t(size_t, res_max_size, sizeof(*hr));

	switch (hm->h.function) {
	case HPI_SUBSYS_CREATE_ADAPTER:
	case HPI_ADAPTER_DELETE:
		/* Application must not use these functions! */
		hr->h.size = sizeof(hr->h);
		hr->h.error = HPI_ERROR_INVALID_OPERATION;
		hr->h.function = hm->h.function;
		uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
		if (uncopied_bytes)
			err = -EFAULT;
		else
			err = 0;
		goto out;
	}

	hr->h.size = res_max_size;
	if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
		hpi_send_recv_f(&hm->m0, &hr->r0, file);
	} else {
		u16 __user *ptr = NULL;
		u32 size = 0;
		/* -1=no data 0=read from user mem, 1=write to user mem */
		int wrflag = -1;
		struct hpi_adapter *pa = NULL;

		if (hm->h.adapter_index < ARRAY_SIZE(adapters))
			pa = &adapters[hm->h.adapter_index];

		if (!pa || !pa->adapter || !pa->adapter->type) {
			hpi_init_response(&hr->r0, hm->h.object,
				hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);

			uncopied_bytes =
				copy_to_user(puhr, hr, sizeof(hr->h));
			if (uncopied_bytes)
				err = -EFAULT;
			else
				err = 0;
			goto out;
		}

		if (mutex_lock_interruptible(&pa->mutex)) {
			err = -EINTR;
			goto out;
		}

		/* Dig out any pointers embedded in the message.  */
		switch (hm->h.function) {
		case HPI_OSTREAM_WRITE:
		case HPI_ISTREAM_READ:{
				/* Yes, sparse, this is correct. */
				ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
				size = hm->m0.u.d.u.data.data_size;

				/* Allocate buffer according to application request.
				   ?Is it better to alloc/free for the duration
				   of the transaction?
				 */
				if (pa->buffer_size < size) {
					HPI_DEBUG_LOG(DEBUG,
						"Realloc adapter %d stream "
						"buffer from %zd to %d\n",
						hm->h.adapter_index,
						pa->buffer_size, size);
					if (pa->p_buffer) {
						pa->buffer_size = 0;
						vfree(pa->p_buffer);
					}
					pa->p_buffer = vmalloc(size);
					if (pa->p_buffer)
						pa->buffer_size = size;
					else {
						HPI_DEBUG_LOG(ERROR,
							"HPI could not allocate "
							"stream buffer size %d\n",
							size);

						mutex_unlock(&pa->mutex);
						err = -EINVAL;
						goto out;
					}
				}

				hm->m0.u.d.u.data.pb_data = pa->p_buffer;
				if (hm->h.function == HPI_ISTREAM_READ)
					/* from card, WRITE to user mem */
					wrflag = 1;
				else
					wrflag = 0;
				break;
			}

		default:
			size = 0;
			break;
		}

		if (size && (wrflag == 0)) {
			uncopied_bytes =
				copy_from_user(pa->p_buffer, ptr, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d "
					"bytes from user\n", uncopied_bytes,
					size);
		}

		hpi_send_recv_f(&hm->m0, &hr->r0, file);

		if (size && (wrflag == 1)) {
			uncopied_bytes =
				copy_to_user(ptr, pa->p_buffer, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d " "bytes to user\n",
					uncopied_bytes, size);
		}

		mutex_unlock(&pa->mutex);
	}

	/* on return response size must be set */
	/*printk(KERN_INFO "response size %d\n", hr->h.wSize); */

	if (!hr->h.size) {
		HPI_DEBUG_LOG(ERROR, "response zero size\n");
		err = -EFAULT;
		goto out;
	}

	if (hr->h.size > res_max_size) {
		HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
			res_max_size);
		hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
		hr->h.specific_error = hr->h.size;
		hr->h.size = sizeof(hr->h);
	}

	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

out:
	kfree(hm);
	kfree(hr);
	return err;
}

static int asihpi_irq_count;

static irqreturn_t asihpi_isr(int irq, void *dev_id)
{
	struct hpi_adapter *a = dev_id;
	int handled;

	if (!a->adapter->irq_query_and_clear) {
		pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type,
			a->adapter->index);
		return IRQ_NONE;
	}

	handled = a->adapter->irq_query_and_clear(a->adapter, 0);

	if (!handled)
		return IRQ_NONE;

	asihpi_irq_count++;
	/* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n",
	   asihpi_irq_count, a->adapter->type, a->adapter->index); */

	if (a->interrupt_callback)
		a->interrupt_callback(a);

	return IRQ_HANDLED;
}

int asihpi_adapter_probe(struct pci_dev *pci_dev,
			 const struct pci_device_id *pci_id)
{
	int idx, nm, low_latency_mode = 0, irq_supported = 0;
	int adapter_index;
	unsigned int memlen;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter adapter;
	struct hpi_pci pci;

	memset(&adapter, 0, sizeof(adapter));

	dev_printk(KERN_DEBUG, &pci_dev->dev,
		"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
		pci_dev->device, pci_dev->subsystem_vendor,
		pci_dev->subsystem_device, pci_dev->devfn);

	if (pci_enable_device(pci_dev) < 0) {
		dev_err(&pci_dev->dev,
			"pci_enable_device failed, disabling device\n");
		return -EIO;
	}

	pci_set_master(pci_dev);	/* also sets latency timer if < 16 */

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CREATE_ADAPTER);
	hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
		HPI_ERROR_PROCESSING_MESSAGE);

	hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;

	nm = HPI_MAX_ADAPTER_MEM_SPACES;

	for (idx = 0; idx < nm; idx++) {
		HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
			&pci_dev->resource[idx]);

		if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
			memlen = pci_resource_len(pci_dev, idx);
			pci.ap_mem_base[idx] =
				ioremap(pci_resource_start(pci_dev, idx),
				memlen);
			if (!pci.ap_mem_base[idx]) {
				HPI_DEBUG_LOG(ERROR,
					"ioremap failed, aborting\n");
				/* unmap previously mapped pci mem space */
				goto err;
			}
		}
	}

	pci.pci_dev = pci_dev;
	hm.u.s.resource.bus_type = HPI_BUS_PCI;
	hm.u.s.resource.r.pci = &pci;

	/* call CreateAdapterObject on the relevant hpi module */
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	if (hr.error)
		goto err;

	adapter_index = hr.u.s.adapter_index;
	adapter.adapter = hpi_find_adapter(adapter_index);

	if (prealloc_stream_buf) {
		adapter.p_buffer = vmalloc(prealloc_stream_buf);
		if (!adapter.p_buffer) {
			HPI_DEBUG_LOG(ERROR,
				"HPI could not allocate "
				"kernel buffer size %d\n",
				prealloc_stream_buf);
			goto err;
		}
	}

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_OPEN);
	hm.adapter_index = adapter.adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	if (hr.error) {
		HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n");
		goto err;
	}

	/* Check if current mode == Low Latency mode */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_GET_MODE);
	hm.adapter_index = adapter.adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	if (!hr.error
		&& hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY)
		low_latency_mode = 1;
	else
		dev_info(&pci_dev->dev,
			"Adapter at index %d is not in low latency mode\n",
			adapter.adapter->index);

	/* Check if IRQs are supported */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_GET_PROPERTY);
	hm.adapter_index = adapter.adapter->index;
	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	if (hr.error || !hr.u.ax.property_get.parameter1) {
		dev_info(&pci_dev->dev,
			"IRQs not supported by adapter at index %d\n",
			adapter.adapter->index);
	} else {
		irq_supported = 1;
	}

	/* WARNING can't init mutex in 'adapter'
	 * and then copy it to adapters[] ?!?!
	 */
	adapters[adapter_index] = adapter;
	mutex_init(&adapters[adapter_index].mutex);
	pci_set_drvdata(pci_dev, &adapters[adapter_index]);

	if (low_latency_mode && irq_supported) {
		if (!adapter.adapter->irq_query_and_clear) {
			dev_err(&pci_dev->dev,
				"no IRQ handler for adapter %d, aborting\n",
				adapter.adapter->index);
			goto err;
		}

		/* Disable IRQ generation on DSP side by setting the rate to 0 */
		hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
			HPI_ADAPTER_SET_PROPERTY);
		hm.adapter_index = adapter.adapter->index;
		hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
		hm.u.ax.property_set.parameter1 = 0;
		hm.u.ax.property_set.parameter2 = 0;
		hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
		if (hr.error) {
			HPI_DEBUG_LOG(ERROR,
				"HPI_ADAPTER_GET_MODE failed, aborting\n");
			goto err;
		}

		/* Note: request_irq calls asihpi_isr here */
		if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED,
				"asihpi", &adapters[adapter_index])) {
			dev_err(&pci_dev->dev, "request_irq(%d) failed\n",
				pci_dev->irq);
			goto err;
		}

		adapters[adapter_index].interrupt_mode = 1;

		dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq);
		adapters[adapter_index].irq = pci_dev->irq;
	} else {
		dev_info(&pci_dev->dev, "using polled mode\n");
	}

	dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n",
		 adapter.adapter->type, adapter_index);

	return 0;

err:
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
		if (pci.ap_mem_base[idx]) {
			iounmap(pci.ap_mem_base[idx]);
			pci.ap_mem_base[idx] = NULL;
		}
	}

	if (adapter.p_buffer) {
		adapter.buffer_size = 0;
		vfree(adapter.p_buffer);
	}

	HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
	return -ENODEV;
}

void asihpi_adapter_remove(struct pci_dev *pci_dev)
{
	int idx;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter *pa;
	struct hpi_pci pci;

	pa = pci_get_drvdata(pci_dev);
	pci = pa->adapter->pci;

	/* Disable IRQ generation on DSP side */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_SET_PROPERTY);
	hm.adapter_index = pa->adapter->index;
	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
	hm.u.ax.property_set.parameter1 = 0;
	hm.u.ax.property_set.parameter2 = 0;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_DELETE);
	hm.adapter_index = pa->adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	/* unmap PCI memory space, mapped during device init. */
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; ++idx)
		iounmap(pci.ap_mem_base[idx]);

	if (pa->irq)
		free_irq(pa->irq, pa);

	vfree(pa->p_buffer);

	if (1)
		dev_info(&pci_dev->dev,
			 "remove %04x:%04x,%04x:%04x,%04x, HPI index %d\n",
			 pci_dev->vendor, pci_dev->device,
			 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
			 pci_dev->devfn, pa->adapter->index);

	memset(pa, 0, sizeof(*pa));
}

void __init asihpi_init(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	memset(adapters, 0, sizeof(adapters));

	printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_LOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}

void asihpi_exit(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_UNLOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}
Commit	Line	Data
719f82d3	1	/*******************************************************************************
719f82d3	2	AudioScience HPI driver
f9a376c3 EB	3	Common Linux HPI ioctl and module probe/remove functions
	4
	5	Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
719f82d3 EB	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of version 2 of the GNU General Public License as
	9	published by the Free Software Foundation;
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
719f82d3 EB	16	*******************************************************************************/
	17	#define SOURCEFILE_NAME "hpioctl.c"
	18
	19	#include "hpi_internal.h"
f6baaec2	20	#include "hpi_version.h"
719f82d3 EB	21	#include "hpimsginit.h"
	22	#include "hpidebug.h"
	23	#include "hpimsgx.h"
	24	#include "hpioctl.h"
6d0b898e	25	#include "hpicmn.h"
719f82d3 EB	26
719f82d3 EB	27	#include <linux/fs.h>
f9a376c3	28	#include <linux/interrupt.h>
719f82d3 EB	29	#include <linux/slab.h>
719f82d3 EB	30	#include <linux/moduleparam.h>
976412fb	31	#include <linux/uaccess.h>
3285ea10	32	#include <linux/pci.h>
719f82d3	33	#include <linux/stringify.h>
da155d5b	34	#include <linux/module.h>
d6472302	35	#include <linux/vmalloc.h>
719f82d3 EB	36
	37	#ifdef MODULE_FIRMWARE
	38	MODULE_FIRMWARE("asihpi/dsp5000.bin");
	39	MODULE_FIRMWARE("asihpi/dsp6200.bin");
	40	MODULE_FIRMWARE("asihpi/dsp6205.bin");
	41	MODULE_FIRMWARE("asihpi/dsp6400.bin");
	42	MODULE_FIRMWARE("asihpi/dsp6600.bin");
	43	MODULE_FIRMWARE("asihpi/dsp8700.bin");
	44	MODULE_FIRMWARE("asihpi/dsp8900.bin");
	45	#endif
	46
	47	static int prealloc_stream_buf;
	48	module_param(prealloc_stream_buf, int, S_IRUGO);
	49	MODULE_PARM_DESC(prealloc_stream_buf,
3285ea10	50	"Preallocate size for per-adapter stream buffer");
719f82d3 EB	51
	52	/* Allow the debug level to be changed after module load.
	53	E.g. echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
	54	*/
	55	module_param(hpi_debug_level, int, S_IRUGO \| S_IWUSR);
	56	MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
	57
	58	/* List of adapters found */
	59	static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
	60
	61	/* Wrapper function to HPI_Message to enable dumping of the
	62	message and response types.
	63	*/
	64	static void hpi_send_recv_f(struct hpi_message phm, struct hpi_response phr,
	65	struct file *file)
	66	{
7036b92d	67	if ((phm->adapter_index >= HPI_MAX_ADAPTERS)
719f82d3 EB	68	&& (phm->object != HPI_OBJ_SUBSYSTEM))
	69	phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
	70	else
	71	hpi_send_recv_ex(phm, phr, file);
	72	}
	73
	74	/* This is called from hpifunc.c functions, called by ALSA
	75	* (or other kernel process) In this case there is no file descriptor
	76	* available for the message cache code
	77	*/
	78	void hpi_send_recv(struct hpi_message phm, struct hpi_response phr)
	79	{
	80	hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
	81	}
	82
	83	EXPORT_SYMBOL(hpi_send_recv);
	84	/* for radio-asihpi */
	85
	86	int asihpi_hpi_release(struct file *file)
	87	{
	88	struct hpi_message hm;
	89	struct hpi_response hr;
	90
	91	/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
	92	/* close the subsystem just in case the application forgot to. */
	93	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	94	HPI_SUBSYS_CLOSE);
	95	hpi_send_recv_ex(&hm, &hr, file);
	96	return 0;
	97	}
	98
	99	long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	100	{
	101	struct hpi_ioctl_linux __user *phpi_ioctl_data;
	102	void __user *puhm;
	103	void __user *puhr;
	104	union hpi_message_buffer_v1 *hm;
	105	union hpi_response_buffer_v1 *hr;
	106	u16 res_max_size;
	107	u32 uncopied_bytes;
719f82d3 EB	108	int err = 0;
	109
	110	if (cmd != HPI_IOCTL_LINUX)
	111	return -EINVAL;
	112
	113	hm = kmalloc(sizeof(*hm), GFP_KERNEL);
	114	hr = kmalloc(sizeof(*hr), GFP_KERNEL);
	115	if (!hm \|\| !hr) {
	116	err = -ENOMEM;
	117	goto out;
	118	}
	119
	120	phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
	121
	122	/* Read the message and response pointers from user space. */
3285ea10 EB	123	if (get_user(puhm, &phpi_ioctl_data->phm)
3285ea10 EB	124	\|\| get_user(puhr, &phpi_ioctl_data->phr)) {
ec9d04b2 KV	125	err = -EFAULT;
	126	goto out;
	127	}
719f82d3 EB	128
719f82d3 EB	129	/* Now read the message size and data from user space. */
ec9d04b2 KV	130	if (get_user(hm->h.size, (u16 __user *)puhm)) {
	131	err = -EFAULT;
	132	goto out;
	133	}
719f82d3 EB	134	if (hm->h.size > sizeof(*hm))
	135	hm->h.size = sizeof(*hm);
	136
3285ea10	137	/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
719f82d3 EB	138
	139	uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
	140	if (uncopied_bytes) {
	141	HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
	142	err = -EFAULT;
	143	goto out;
	144	}
	145
ec9d04b2 KV	146	if (get_user(res_max_size, (u16 __user *)puhr)) {
	147	err = -EFAULT;
	148	goto out;
	149	}
719f82d3 EB	150	/* printk(KERN_INFO "user response size %d\n", res_max_size); */
	151	if (res_max_size < sizeof(struct hpi_response_header)) {
	152	HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
	153	err = -EFAULT;
	154	goto out;
	155	}
	156
0d02e129 EB	157	res_max_size = min_t(size_t, res_max_size, sizeof(*hr));
0d02e129 EB	158
6d0b898e EB	159	switch (hm->h.function) {
	160	case HPI_SUBSYS_CREATE_ADAPTER:
	161	case HPI_ADAPTER_DELETE:
	162	/* Application must not use these functions! */
	163	hr->h.size = sizeof(hr->h);
	164	hr->h.error = HPI_ERROR_INVALID_OPERATION;
	165	hr->h.function = hm->h.function;
	166	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	167	if (uncopied_bytes)
	168	err = -EFAULT;
	169	else
	170	err = 0;
	171	goto out;
	172	}
	173
3285ea10	174	hr->h.size = res_max_size;
719f82d3	175	if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
6d0b898e	176	hpi_send_recv_f(&hm->m0, &hr->r0, file);
719f82d3 EB	177	} else {
	178	u16 __user *ptr = NULL;
	179	u32 size = 0;
719f82d3 EB	180	/* -1=no data 0=read from user mem, 1=write to user mem */
719f82d3 EB	181	int wrflag = -1;
7036b92d	182	struct hpi_adapter *pa = NULL;
08f984c7	183
7036b92d	184	if (hm->h.adapter_index < ARRAY_SIZE(adapters))
08f984c7	185	pa = &adapters[hm->h.adapter_index];
719f82d3	186
7036b92d	187	if (!pa \|\| !pa->adapter \|\| !pa->adapter->type) {
08f984c7 EB	188	hpi_init_response(&hr->r0, hm->h.object,
08f984c7 EB	189	hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
719f82d3 EB	190
	191	uncopied_bytes =
	192	copy_to_user(puhr, hr, sizeof(hr->h));
	193	if (uncopied_bytes)
	194	err = -EFAULT;
	195	else
	196	err = 0;
	197	goto out;
	198	}
	199
767cd365	200	if (mutex_lock_interruptible(&pa->mutex)) {
719f82d3 EB	201	err = -EINTR;
	202	goto out;
	203	}
	204
	205	/* Dig out any pointers embedded in the message. */
	206	switch (hm->h.function) {
	207	case HPI_OSTREAM_WRITE:
	208	case HPI_ISTREAM_READ:{
	209	/* Yes, sparse, this is correct. */
	210	ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
	211	size = hm->m0.u.d.u.data.data_size;
	212
	213	/* Allocate buffer according to application request.
	214	?Is it better to alloc/free for the duration
	215	of the transaction?
	216	*/
	217	if (pa->buffer_size < size) {
	218	HPI_DEBUG_LOG(DEBUG,
3285ea10	219	"Realloc adapter %d stream "
719f82d3 EB	220	"buffer from %zd to %d\n",
	221	hm->h.adapter_index,
	222	pa->buffer_size, size);
	223	if (pa->p_buffer) {
	224	pa->buffer_size = 0;
	225	vfree(pa->p_buffer);
	226	}
	227	pa->p_buffer = vmalloc(size);
	228	if (pa->p_buffer)
	229	pa->buffer_size = size;
	230	else {
	231	HPI_DEBUG_LOG(ERROR,
	232	"HPI could not allocate "
	233	"stream buffer size %d\n",
	234	size);
	235
767cd365	236	mutex_unlock(&pa->mutex);
719f82d3 EB	237	err = -EINVAL;
	238	goto out;
	239	}
	240	}
	241
	242	hm->m0.u.d.u.data.pb_data = pa->p_buffer;
	243	if (hm->h.function == HPI_ISTREAM_READ)
	244	/* from card, WRITE to user mem */
	245	wrflag = 1;
	246	else
	247	wrflag = 0;
	248	break;
	249	}
	250
	251	default:
	252	size = 0;
	253	break;
	254	}
	255
	256	if (size && (wrflag == 0)) {
	257	uncopied_bytes =
	258	copy_from_user(pa->p_buffer, ptr, size);
	259	if (uncopied_bytes)
	260	HPI_DEBUG_LOG(WARNING,
3285ea10	261	"Missed %d of %d "
719f82d3 EB	262	"bytes from user\n", uncopied_bytes,
	263	size);
	264	}
	265
	266	hpi_send_recv_f(&hm->m0, &hr->r0, file);
	267
	268	if (size && (wrflag == 1)) {
	269	uncopied_bytes =
	270	copy_to_user(ptr, pa->p_buffer, size);
	271	if (uncopied_bytes)
	272	HPI_DEBUG_LOG(WARNING,
3285ea10	273	"Missed %d of %d " "bytes to user\n",
719f82d3 EB	274	uncopied_bytes, size);
	275	}
	276
767cd365	277	mutex_unlock(&pa->mutex);
719f82d3 EB	278	}
	279
	280	/* on return response size must be set */
	281	/printk(KERN_INFO "response size %d\n", hr->h.wSize); /
	282
	283	if (!hr->h.size) {
	284	HPI_DEBUG_LOG(ERROR, "response zero size\n");
	285	err = -EFAULT;
	286	goto out;
	287	}
	288
	289	if (hr->h.size > res_max_size) {
	290	HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
	291	res_max_size);
3285ea10 EB	292	hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
	293	hr->h.specific_error = hr->h.size;
	294	hr->h.size = sizeof(hr->h);
719f82d3 EB	295	}
	296
	297	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	298	if (uncopied_bytes) {
	299	HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
	300	err = -EFAULT;
	301	goto out;
	302	}
	303
	304	out:
	305	kfree(hm);
	306	kfree(hr);
	307	return err;
	308	}
	309
f9a376c3 EB	310	static int asihpi_irq_count;
	311
	312	static irqreturn_t asihpi_isr(int irq, void *dev_id)
	313	{
	314	struct hpi_adapter *a = dev_id;
	315	int handled;
	316
	317	if (!a->adapter->irq_query_and_clear) {
	318	pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type,
	319	a->adapter->index);
	320	return IRQ_NONE;
	321	}
	322
	323	handled = a->adapter->irq_query_and_clear(a->adapter, 0);
	324
	325	if (!handled)
	326	return IRQ_NONE;
	327
	328	asihpi_irq_count++;
	329	/* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n",
	330	asihpi_irq_count, a->adapter->type, a->adapter->index); */
	331
	332	if (a->interrupt_callback)
	333	a->interrupt_callback(a);
	334
	335	return IRQ_HANDLED;
	336	}
	337
e23e7a14 BP	338	int asihpi_adapter_probe(struct pci_dev *pci_dev,
e23e7a14 BP	339	const struct pci_device_id *pci_id)
719f82d3	340	{
f9a376c3	341	int idx, nm, low_latency_mode = 0, irq_supported = 0;
7036b92d	342	int adapter_index;
719f82d3 EB	343	unsigned int memlen;
	344	struct hpi_message hm;
	345	struct hpi_response hr;
	346	struct hpi_adapter adapter;
	347	struct hpi_pci pci;
	348
	349	memset(&adapter, 0, sizeof(adapter));
	350
3285ea10 EB	351	dev_printk(KERN_DEBUG, &pci_dev->dev,
	352	"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
	353	pci_dev->device, pci_dev->subsystem_vendor,
719f82d3 EB	354	pci_dev->subsystem_device, pci_dev->devfn);
719f82d3 EB	355
3285ea10	356	if (pci_enable_device(pci_dev) < 0) {
4ee3bffc	357	dev_err(&pci_dev->dev,
3285ea10 EB	358	"pci_enable_device failed, disabling device\n");
	359	return -EIO;
	360	}
	361
	362	pci_set_master(pci_dev); /* also sets latency timer if < 16 */
	363
719f82d3 EB	364	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	365	HPI_SUBSYS_CREATE_ADAPTER);
	366	hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
	367	HPI_ERROR_PROCESSING_MESSAGE);
	368
3285ea10	369	hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
719f82d3	370
719f82d3 EB	371	nm = HPI_MAX_ADAPTER_MEM_SPACES;
	372
	373	for (idx = 0; idx < nm; idx++) {
42258dab EB	374	HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
42258dab EB	375	&pci_dev->resource[idx]);
719f82d3 EB	376
	377	if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
	378	memlen = pci_resource_len(pci_dev, idx);
7036b92d	379	pci.ap_mem_base[idx] =
719f82d3 EB	380	ioremap(pci_resource_start(pci_dev, idx),
719f82d3 EB	381	memlen);
7036b92d	382	if (!pci.ap_mem_base[idx]) {
719f82d3 EB	383	HPI_DEBUG_LOG(ERROR,
	384	"ioremap failed, aborting\n");
	385	/* unmap previously mapped pci mem space */
	386	goto err;
	387	}
	388	}
719f82d3 EB	389	}
719f82d3 EB	390
3285ea10	391	pci.pci_dev = pci_dev;
719f82d3 EB	392	hm.u.s.resource.bus_type = HPI_BUS_PCI;
	393	hm.u.s.resource.r.pci = &pci;
	394
	395	/* call CreateAdapterObject on the relevant hpi module */
	396	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	397	if (hr.error)
	398	goto err;
	399
7036b92d EB	400	adapter_index = hr.u.s.adapter_index;
	401	adapter.adapter = hpi_find_adapter(adapter_index);
	402
719f82d3 EB	403	if (prealloc_stream_buf) {
	404	adapter.p_buffer = vmalloc(prealloc_stream_buf);
	405	if (!adapter.p_buffer) {
	406	HPI_DEBUG_LOG(ERROR,
	407	"HPI could not allocate "
	408	"kernel buffer size %d\n",
	409	prealloc_stream_buf);
	410	goto err;
	411	}
	412	}
	413
6d0b898e EB	414	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
6d0b898e EB	415	HPI_ADAPTER_OPEN);
7036b92d	416	hm.adapter_index = adapter.adapter->index;
6d0b898e	417	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
719f82d3	418
f9a376c3 EB	419	if (hr.error) {
	420	HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n");
	421	goto err;
	422	}
	423
	424	/* Check if current mode == Low Latency mode */
	425	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	426	HPI_ADAPTER_GET_MODE);
	427	hm.adapter_index = adapter.adapter->index;
	428	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	429
dc612838 EB	430	if (!hr.error
dc612838 EB	431	&& hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY)
f9a376c3	432	low_latency_mode = 1;
dc612838 EB	433	else
	434	dev_info(&pci_dev->dev,
	435	"Adapter at index %d is not in low latency mode\n",
	436	adapter.adapter->index);
f9a376c3 EB	437
	438	/* Check if IRQs are supported */
	439	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	440	HPI_ADAPTER_GET_PROPERTY);
	441	hm.adapter_index = adapter.adapter->index;
	442	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ;
	443	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	444	if (hr.error \|\| !hr.u.ax.property_get.parameter1) {
	445	dev_info(&pci_dev->dev,
	446	"IRQs not supported by adapter at index %d\n",
	447	adapter.adapter->index);
	448	} else {
	449	irq_supported = 1;
	450	}
719f82d3	451
719f82d3 EB	452	/* WARNING can't init mutex in 'adapter'
	453	* and then copy it to adapters[] ?!?!
	454	*/
7036b92d EB	455	adapters[adapter_index] = adapter;
	456	mutex_init(&adapters[adapter_index].mutex);
	457	pci_set_drvdata(pci_dev, &adapters[adapter_index]);
719f82d3	458
f9a376c3 EB	459	if (low_latency_mode && irq_supported) {
	460	if (!adapter.adapter->irq_query_and_clear) {
	461	dev_err(&pci_dev->dev,
	462	"no IRQ handler for adapter %d, aborting\n",
	463	adapter.adapter->index);
	464	goto err;
	465	}
	466
	467	/* Disable IRQ generation on DSP side by setting the rate to 0 */
	468	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	469	HPI_ADAPTER_SET_PROPERTY);
	470	hm.adapter_index = adapter.adapter->index;
	471	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
	472	hm.u.ax.property_set.parameter1 = 0;
	473	hm.u.ax.property_set.parameter2 = 0;
	474	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	475	if (hr.error) {
	476	HPI_DEBUG_LOG(ERROR,
	477	"HPI_ADAPTER_GET_MODE failed, aborting\n");
	478	goto err;
	479	}
	480
	481	/* Note: request_irq calls asihpi_isr here */
	482	if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED,
	483	"asihpi", &adapters[adapter_index])) {
	484	dev_err(&pci_dev->dev, "request_irq(%d) failed\n",
	485	pci_dev->irq);
	486	goto err;
	487	}
	488
	489	adapters[adapter_index].interrupt_mode = 1;
	490
	491	dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq);
	492	adapters[adapter_index].irq = pci_dev->irq;
	493	} else {
	494	dev_info(&pci_dev->dev, "using polled mode\n");
	495	}
	496
4ee3bffc JP	497	dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n",
4ee3bffc JP	498	adapter.adapter->type, adapter_index);
719f82d3 EB	499
	500	return 0;
	501
	502	err:
	503	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
7036b92d EB	504	if (pci.ap_mem_base[idx]) {
	505	iounmap(pci.ap_mem_base[idx]);
	506	pci.ap_mem_base[idx] = NULL;
719f82d3 EB	507	}
	508	}
	509
	510	if (adapter.p_buffer) {
	511	adapter.buffer_size = 0;
	512	vfree(adapter.p_buffer);
	513	}
	514
	515	HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
	516	return -ENODEV;
	517	}
	518
e23e7a14	519	void asihpi_adapter_remove(struct pci_dev *pci_dev)
719f82d3 EB	520	{
	521	int idx;
	522	struct hpi_message hm;
	523	struct hpi_response hr;
	524	struct hpi_adapter *pa;
7036b92d EB	525	struct hpi_pci pci;
7036b92d EB	526
5dbea6b1	527	pa = pci_get_drvdata(pci_dev);
7036b92d	528	pci = pa->adapter->pci;
719f82d3	529
f9a376c3 EB	530	/* Disable IRQ generation on DSP side */
	531	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	532	HPI_ADAPTER_SET_PROPERTY);
	533	hm.adapter_index = pa->adapter->index;
	534	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
	535	hm.u.ax.property_set.parameter1 = 0;
	536	hm.u.ax.property_set.parameter2 = 0;
	537	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	538
6d0b898e EB	539	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
6d0b898e EB	540	HPI_ADAPTER_DELETE);
7036b92d	541	hm.adapter_index = pa->adapter->index;
719f82d3 EB	542	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	543
	544	/* unmap PCI memory space, mapped during device init. */
ff6defa6 ME	545	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; ++idx)
ff6defa6 ME	546	iounmap(pci.ap_mem_base[idx]);
719f82d3	547
f9a376c3 EB	548	if (pa->irq)
	549	free_irq(pa->irq, pa);
	550
87164cc5	551	vfree(pa->p_buffer);
719f82d3	552
3285ea10	553	if (1)
4ee3bffc JP	554	dev_info(&pci_dev->dev,
	555	"remove %04x:%04x,%04x:%04x,%04x, HPI index %d\n",
	556	pci_dev->vendor, pci_dev->device,
	557	pci_dev->subsystem_vendor, pci_dev->subsystem_device,
	558	pci_dev->devfn, pa->adapter->index);
c188dec3 EB	559
c188dec3 EB	560	memset(pa, 0, sizeof(*pa));
719f82d3 EB	561	}
	562
	563	void __init asihpi_init(void)
	564	{
	565	struct hpi_message hm;
	566	struct hpi_response hr;
	567
	568	memset(adapters, 0, sizeof(adapters));
	569
1dd6aaaa	570	printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
719f82d3 EB	571
	572	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	573	HPI_SUBSYS_DRIVER_LOAD);
	574	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	575	}
	576
	577	void asihpi_exit(void)
	578	{
	579	struct hpi_message hm;
	580	struct hpi_response hr;
	581
	582	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	583	HPI_SUBSYS_DRIVER_UNLOAD);
	584	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	585	}