linux/drivers/gpu/drm/udl/udl_main.c
Linus Torvalds 612a9aab56 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...
2012-10-03 23:29:23 -07:00

336 lines
7.6 KiB
C

/*
* Copyright (C) 2012 Red Hat
*
* based in parts on udlfb.c:
* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License v2. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <drm/drmP.h>
#include "udl_drv.h"
/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
#define BULK_SIZE 512
#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
#define WRITES_IN_FLIGHT (4)
#define MAX_VENDOR_DESCRIPTOR_SIZE 256
#define GET_URB_TIMEOUT HZ
#define FREE_URB_TIMEOUT (HZ*2)
static int udl_parse_vendor_descriptor(struct drm_device *dev,
struct usb_device *usbdev)
{
struct udl_device *udl = dev->dev_private;
char *desc;
char *buf;
char *desc_end;
u8 total_len = 0;
buf = kzalloc(MAX_VENDOR_DESCRIPTOR_SIZE, GFP_KERNEL);
if (!buf)
return false;
desc = buf;
total_len = usb_get_descriptor(usbdev, 0x5f, /* vendor specific */
0, desc, MAX_VENDOR_DESCRIPTOR_SIZE);
if (total_len > 5) {
DRM_INFO("vendor descriptor length:%x data:%*ph\n",
total_len, 11, desc);
if ((desc[0] != total_len) || /* descriptor length */
(desc[1] != 0x5f) || /* vendor descriptor type */
(desc[2] != 0x01) || /* version (2 bytes) */
(desc[3] != 0x00) ||
(desc[4] != total_len - 2)) /* length after type */
goto unrecognized;
desc_end = desc + total_len;
desc += 5; /* the fixed header we've already parsed */
while (desc < desc_end) {
u8 length;
u16 key;
key = le16_to_cpu(*((u16 *) desc));
desc += sizeof(u16);
length = *desc;
desc++;
switch (key) {
case 0x0200: { /* max_area */
u32 max_area;
max_area = le32_to_cpu(*((u32 *)desc));
DRM_DEBUG("DL chip limited to %d pixel modes\n",
max_area);
udl->sku_pixel_limit = max_area;
break;
}
default:
break;
}
desc += length;
}
}
goto success;
unrecognized:
/* allow udlfb to load for now even if firmware unrecognized */
DRM_ERROR("Unrecognized vendor firmware descriptor\n");
success:
kfree(buf);
return true;
}
static void udl_release_urb_work(struct work_struct *work)
{
struct urb_node *unode = container_of(work, struct urb_node,
release_urb_work.work);
up(&unode->dev->urbs.limit_sem);
}
void udl_urb_completion(struct urb *urb)
{
struct urb_node *unode = urb->context;
struct udl_device *udl = unode->dev;
unsigned long flags;
/* sync/async unlink faults aren't errors */
if (urb->status) {
if (!(urb->status == -ENOENT ||
urb->status == -ECONNRESET ||
urb->status == -ESHUTDOWN)) {
DRM_ERROR("%s - nonzero write bulk status received: %d\n",
__func__, urb->status);
atomic_set(&udl->lost_pixels, 1);
}
}
urb->transfer_buffer_length = udl->urbs.size; /* reset to actual */
spin_lock_irqsave(&udl->urbs.lock, flags);
list_add_tail(&unode->entry, &udl->urbs.list);
udl->urbs.available++;
spin_unlock_irqrestore(&udl->urbs.lock, flags);
#if 0
/*
* When using fb_defio, we deadlock if up() is called
* while another is waiting. So queue to another process.
*/
if (fb_defio)
schedule_delayed_work(&unode->release_urb_work, 0);
else
#endif
up(&udl->urbs.limit_sem);
}
static void udl_free_urb_list(struct drm_device *dev)
{
struct udl_device *udl = dev->dev_private;
int count = udl->urbs.count;
struct list_head *node;
struct urb_node *unode;
struct urb *urb;
int ret;
unsigned long flags;
DRM_DEBUG("Waiting for completes and freeing all render urbs\n");
/* keep waiting and freeing, until we've got 'em all */
while (count--) {
/* Getting interrupted means a leak, but ok at shutdown*/
ret = down_interruptible(&udl->urbs.limit_sem);
if (ret)
break;
spin_lock_irqsave(&udl->urbs.lock, flags);
node = udl->urbs.list.next; /* have reserved one with sem */
list_del_init(node);
spin_unlock_irqrestore(&udl->urbs.lock, flags);
unode = list_entry(node, struct urb_node, entry);
urb = unode->urb;
/* Free each separately allocated piece */
usb_free_coherent(urb->dev, udl->urbs.size,
urb->transfer_buffer, urb->transfer_dma);
usb_free_urb(urb);
kfree(node);
}
udl->urbs.count = 0;
}
static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)
{
struct udl_device *udl = dev->dev_private;
int i = 0;
struct urb *urb;
struct urb_node *unode;
char *buf;
spin_lock_init(&udl->urbs.lock);
udl->urbs.size = size;
INIT_LIST_HEAD(&udl->urbs.list);
while (i < count) {
unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL);
if (!unode)
break;
unode->dev = udl;
INIT_DELAYED_WORK(&unode->release_urb_work,
udl_release_urb_work);
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
kfree(unode);
break;
}
unode->urb = urb;
buf = usb_alloc_coherent(udl->ddev->usbdev, MAX_TRANSFER, GFP_KERNEL,
&urb->transfer_dma);
if (!buf) {
kfree(unode);
usb_free_urb(urb);
break;
}
/* urb->transfer_buffer_length set to actual before submit */
usb_fill_bulk_urb(urb, udl->ddev->usbdev, usb_sndbulkpipe(udl->ddev->usbdev, 1),
buf, size, udl_urb_completion, unode);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
list_add_tail(&unode->entry, &udl->urbs.list);
i++;
}
sema_init(&udl->urbs.limit_sem, i);
udl->urbs.count = i;
udl->urbs.available = i;
DRM_DEBUG("allocated %d %d byte urbs\n", i, (int) size);
return i;
}
struct urb *udl_get_urb(struct drm_device *dev)
{
struct udl_device *udl = dev->dev_private;
int ret = 0;
struct list_head *entry;
struct urb_node *unode;
struct urb *urb = NULL;
unsigned long flags;
/* Wait for an in-flight buffer to complete and get re-queued */
ret = down_timeout(&udl->urbs.limit_sem, GET_URB_TIMEOUT);
if (ret) {
atomic_set(&udl->lost_pixels, 1);
DRM_INFO("wait for urb interrupted: %x available: %d\n",
ret, udl->urbs.available);
goto error;
}
spin_lock_irqsave(&udl->urbs.lock, flags);
BUG_ON(list_empty(&udl->urbs.list)); /* reserved one with limit_sem */
entry = udl->urbs.list.next;
list_del_init(entry);
udl->urbs.available--;
spin_unlock_irqrestore(&udl->urbs.lock, flags);
unode = list_entry(entry, struct urb_node, entry);
urb = unode->urb;
error:
return urb;
}
int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len)
{
struct udl_device *udl = dev->dev_private;
int ret;
BUG_ON(len > udl->urbs.size);
urb->transfer_buffer_length = len; /* set to actual payload len */
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret) {
udl_urb_completion(urb); /* because no one else will */
atomic_set(&udl->lost_pixels, 1);
DRM_ERROR("usb_submit_urb error %x\n", ret);
}
return ret;
}
int udl_driver_load(struct drm_device *dev, unsigned long flags)
{
struct udl_device *udl;
int ret;
DRM_DEBUG("\n");
udl = kzalloc(sizeof(struct udl_device), GFP_KERNEL);
if (!udl)
return -ENOMEM;
udl->ddev = dev;
dev->dev_private = udl;
if (!udl_parse_vendor_descriptor(dev, dev->usbdev)) {
DRM_ERROR("firmware not recognized. Assume incompatible device\n");
goto err;
}
if (!udl_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) {
ret = -ENOMEM;
DRM_ERROR("udl_alloc_urb_list failed\n");
goto err;
}
DRM_DEBUG("\n");
ret = udl_modeset_init(dev);
ret = udl_fbdev_init(dev);
return 0;
err:
kfree(udl);
DRM_ERROR("%d\n", ret);
return ret;
}
int udl_drop_usb(struct drm_device *dev)
{
udl_free_urb_list(dev);
return 0;
}
int udl_driver_unload(struct drm_device *dev)
{
struct udl_device *udl = dev->dev_private;
if (udl->urbs.count)
udl_free_urb_list(dev);
udl_fbdev_cleanup(dev);
udl_modeset_cleanup(dev);
kfree(udl);
return 0;
}