diff options
Diffstat (limited to 'drivers/macintosh/macio_asic.c')
| -rw-r--r-- | drivers/macintosh/macio_asic.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c index 588a5b0bc4b5..26a303a1d1ab 100644 --- a/drivers/macintosh/macio_asic.c +++ b/drivers/macintosh/macio_asic.c @@ -379,6 +379,11 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip, dev->ofdev.dev.parent = parent; dev->ofdev.dev.bus = &macio_bus_type; dev->ofdev.dev.release = macio_release_dev; + dev->ofdev.dev.dma_parms = &dev->dma_parms; + + /* Standard DMA paremeters */ + dma_set_max_seg_size(&dev->ofdev.dev, 65536); + dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff); #ifdef CONFIG_PCI /* Set the DMA ops to the ones from the PCI device, this could be @@ -538,6 +543,42 @@ void macio_unregister_driver(struct macio_driver *drv) driver_unregister(&drv->driver); } +/* Managed MacIO resources */ +struct macio_devres { + u32 res_mask; +}; + +static void maciom_release(struct device *gendev, void *res) +{ + struct macio_dev *dev = to_macio_device(gendev); + struct macio_devres *dr = res; + int i, max; + + max = min(dev->n_resources, 32); + for (i = 0; i < max; i++) { + if (dr->res_mask & (1 << i)) + macio_release_resource(dev, i); + } +} + +int macio_enable_devres(struct macio_dev *dev) +{ + struct macio_devres *dr; + + dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); + if (!dr) { + dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return -ENOMEM; + } + return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL; +} + +static struct macio_devres * find_macio_dr(struct macio_dev *dev) +{ + return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); +} + /** * macio_request_resource - Request an MMIO resource * @dev: pointer to the device holding the resource @@ -555,6 +596,8 @@ void macio_unregister_driver(struct macio_driver *drv) int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name) { + struct macio_devres *dr = find_macio_dr(dev); + if (macio_resource_len(dev, resource_no) == 0) return 0; @@ -562,6 +605,9 @@ int macio_request_resource(struct macio_dev *dev, int resource_no, macio_resource_len(dev, resource_no), name)) goto err_out; + + if (dr && resource_no < 32) + dr->res_mask |= 1 << resource_no; return 0; @@ -582,10 +628,14 @@ err_out: */ void macio_release_resource(struct macio_dev *dev, int resource_no) { + struct macio_devres *dr = find_macio_dr(dev); + if (macio_resource_len(dev, resource_no) == 0) return; release_mem_region(macio_resource_start(dev, resource_no), macio_resource_len(dev, resource_no)); + if (dr && resource_no < 32) + dr->res_mask &= ~(1 << resource_no); } /** @@ -744,3 +794,5 @@ EXPORT_SYMBOL(macio_request_resource); EXPORT_SYMBOL(macio_release_resource); EXPORT_SYMBOL(macio_request_resources); EXPORT_SYMBOL(macio_release_resources); +EXPORT_SYMBOL(macio_enable_devres); + |