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Diffstat (limited to 'drivers/gpu/drm/drm_pci.c')
-rw-r--r--drivers/gpu/drm/drm_pci.c505
1 files changed, 505 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
new file mode 100644
index 0000000..14194b6
--- /dev/null
+++ b/drivers/gpu/drm/drm_pci.c
@@ -0,0 +1,505 @@
+/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */
+/**
+ * \file drm_pci.c
+ * \brief Functions and ioctls to manage PCI memory
+ *
+ * \warning These interfaces aren't stable yet.
+ *
+ * \todo Implement the remaining ioctl's for the PCI pools.
+ * \todo The wrappers here are so thin that they would be better off inlined..
+ *
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ * \author Leif Delgass <ldelgass@retinalburn.net>
+ */
+
+/*
+ * Copyright 2003 José Fonseca.
+ * Copyright 2003 Leif Delgass.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <drm/drmP.h>
+
+/**********************************************************************/
+/** \name PCI memory */
+/*@{*/
+
+/**
+ * \brief Allocate a PCI consistent memory block, for DMA.
+ */
+drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
+{
+ drm_dma_handle_t *dmah;
+#if 1
+ unsigned long addr;
+ size_t sz;
+#endif
+
+ /* pci_alloc_consistent only guarantees alignment to the smallest
+ * PAGE_SIZE order which is greater than or equal to the requested size.
+ * Return NULL here for now to make sure nobody tries for larger alignment
+ */
+ if (align > size)
+ return NULL;
+
+ dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
+ if (!dmah)
+ return NULL;
+
+ dmah->size = size;
+ dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
+
+ if (dmah->vaddr == NULL) {
+ kfree(dmah);
+ return NULL;
+ }
+
+ memset(dmah->vaddr, 0, size);
+
+ /* XXX - Is virt_to_page() legal for consistent mem? */
+ /* Reserve */
+ for (addr = (unsigned long)dmah->vaddr, sz = size;
+ sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+ SetPageReserved(virt_to_page(addr));
+ }
+
+ return dmah;
+}
+
+EXPORT_SYMBOL(drm_pci_alloc);
+
+/**
+ * \brief Free a PCI consistent memory block without freeing its descriptor.
+ *
+ * This function is for internal use in the Linux-specific DRM core code.
+ */
+void __drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
+{
+#if 1
+ unsigned long addr;
+ size_t sz;
+#endif
+
+ if (dmah->vaddr) {
+ /* XXX - Is virt_to_page() legal for consistent mem? */
+ /* Unreserve */
+ for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
+ sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ }
+ dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
+ dmah->busaddr);
+ }
+}
+
+/**
+ * \brief Free a PCI consistent memory block
+ */
+void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
+{
+ __drm_pci_free(dev, dmah);
+ kfree(dmah);
+}
+
+EXPORT_SYMBOL(drm_pci_free);
+
+#ifdef CONFIG_PCI
+
+static int drm_get_pci_domain(struct drm_device *dev)
+{
+#ifndef __alpha__
+ /* For historical reasons, drm_get_pci_domain() is busticated
+ * on most archs and has to remain so for userspace interface
+ * < 1.4, except on alpha which was right from the beginning
+ */
+ if (dev->if_version < 0x10004)
+ return 0;
+#endif /* __alpha__ */
+
+ return pci_domain_nr(dev->pdev->bus);
+}
+
+static int drm_pci_get_irq(struct drm_device *dev)
+{
+ return dev->pdev->irq;
+}
+
+static const char *drm_pci_get_name(struct drm_device *dev)
+{
+ struct pci_driver *pdriver = dev->driver->kdriver.pci;
+ return pdriver->name;
+}
+
+static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
+{
+ int len, ret;
+ struct pci_driver *pdriver = dev->driver->kdriver.pci;
+ master->unique_len = 40;
+ master->unique_size = master->unique_len;
+ master->unique = kmalloc(master->unique_size, GFP_KERNEL);
+ if (master->unique == NULL)
+ return -ENOMEM;
+
+
+ len = snprintf(master->unique, master->unique_len,
+ "pci:%04x:%02x:%02x.%d",
+ drm_get_pci_domain(dev),
+ dev->pdev->bus->number,
+ PCI_SLOT(dev->pdev->devfn),
+ PCI_FUNC(dev->pdev->devfn));
+
+ if (len >= master->unique_len) {
+ DRM_ERROR("buffer overflow");
+ ret = -EINVAL;
+ goto err;
+ } else
+ master->unique_len = len;
+
+ dev->devname =
+ kmalloc(strlen(pdriver->name) +
+ master->unique_len + 2, GFP_KERNEL);
+
+ if (dev->devname == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ sprintf(dev->devname, "%s@%s", pdriver->name,
+ master->unique);
+
+ return 0;
+err:
+ return ret;
+}
+
+static int drm_pci_set_unique(struct drm_device *dev,
+ struct drm_master *master,
+ struct drm_unique *u)
+{
+ int domain, bus, slot, func, ret;
+ const char *bus_name;
+
+ master->unique_len = u->unique_len;
+ master->unique_size = u->unique_len + 1;
+ master->unique = kmalloc(master->unique_size, GFP_KERNEL);
+ if (!master->unique) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ if (copy_from_user(master->unique, u->unique, master->unique_len)) {
+ ret = -EFAULT;
+ goto err;
+ }
+
+ master->unique[master->unique_len] = '\0';
+
+ bus_name = dev->driver->bus->get_name(dev);
+ dev->devname = kmalloc(strlen(bus_name) +
+ strlen(master->unique) + 2, GFP_KERNEL);
+ if (!dev->devname) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ sprintf(dev->devname, "%s@%s", bus_name,
+ master->unique);
+
+ /* Return error if the busid submitted doesn't match the device's actual
+ * busid.
+ */
+ ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
+ if (ret != 3) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ domain = bus >> 8;
+ bus &= 0xff;
+
+ if ((domain != drm_get_pci_domain(dev)) ||
+ (bus != dev->pdev->bus->number) ||
+ (slot != PCI_SLOT(dev->pdev->devfn)) ||
+ (func != PCI_FUNC(dev->pdev->devfn))) {
+ ret = -EINVAL;
+ goto err;
+ }
+ return 0;
+err:
+ return ret;
+}
+
+
+static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
+{
+ if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
+ (p->busnum & 0xff) != dev->pdev->bus->number ||
+ p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
+ return -EINVAL;
+
+ p->irq = dev->pdev->irq;
+
+ DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
+ p->irq);
+ return 0;
+}
+
+static int drm_pci_agp_init(struct drm_device *dev)
+{
+ if (drm_core_has_AGP(dev)) {
+ if (drm_pci_device_is_agp(dev))
+ dev->agp = drm_agp_init(dev);
+ if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
+ && (dev->agp == NULL)) {
+ DRM_ERROR("Cannot initialize the agpgart module.\n");
+ return -EINVAL;
+ }
+ if (drm_core_has_MTRR(dev)) {
+ if (dev->agp)
+ dev->agp->agp_mtrr =
+ mtrr_add(dev->agp->agp_info.aper_base,
+ dev->agp->agp_info.aper_size *
+ 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
+ }
+ }
+ return 0;
+}
+
+static struct drm_bus drm_pci_bus = {
+ .bus_type = DRIVER_BUS_PCI,
+ .get_irq = drm_pci_get_irq,
+ .get_name = drm_pci_get_name,
+ .set_busid = drm_pci_set_busid,
+ .set_unique = drm_pci_set_unique,
+ .irq_by_busid = drm_pci_irq_by_busid,
+ .agp_init = drm_pci_agp_init,
+};
+
+/**
+ * Register.
+ *
+ * \param pdev - PCI device structure
+ * \param ent entry from the PCI ID table with device type flags
+ * \return zero on success or a negative number on failure.
+ *
+ * Attempt to gets inter module "drm" information. If we are first
+ * then register the character device and inter module information.
+ * Try and register, if we fail to register, backout previous work.
+ */
+int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
+ struct drm_driver *driver)
+{
+ struct drm_device *dev;
+ int ret;
+
+ DRM_DEBUG("\n");
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ goto err_g1;
+
+ dev->pdev = pdev;
+ dev->dev = &pdev->dev;
+
+ dev->pci_device = pdev->device;
+ dev->pci_vendor = pdev->vendor;
+
+#ifdef __alpha__
+ dev->hose = pdev->sysdata;
+#endif
+
+ mutex_lock(&drm_global_mutex);
+
+ if ((ret = drm_fill_in_dev(dev, ent, driver))) {
+ printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
+ goto err_g2;
+ }
+
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ pci_set_drvdata(pdev, dev);
+ ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
+ if (ret)
+ goto err_g2;
+ }
+
+ if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
+ goto err_g3;
+
+ if (dev->driver->load) {
+ ret = dev->driver->load(dev, ent->driver_data);
+ if (ret)
+ goto err_g4;
+ }
+
+ /* setup the grouping for the legacy output */
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ ret = drm_mode_group_init_legacy_group(dev,
+ &dev->primary->mode_group);
+ if (ret)
+ goto err_g4;
+ }
+
+ list_add_tail(&dev->driver_item, &driver->device_list);
+
+ DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
+ driver->name, driver->major, driver->minor, driver->patchlevel,
+ driver->date, pci_name(pdev), dev->primary->index);
+
+ mutex_unlock(&drm_global_mutex);
+ return 0;
+
+err_g4:
+ drm_put_minor(&dev->primary);
+err_g3:
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ drm_put_minor(&dev->control);
+err_g2:
+ pci_disable_device(pdev);
+err_g1:
+ kfree(dev);
+ mutex_unlock(&drm_global_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(drm_get_pci_dev);
+
+/**
+ * PCI device initialization. Called direct from modules at load time.
+ *
+ * \return zero on success or a negative number on failure.
+ *
+ * Initializes a drm_device structures,registering the
+ * stubs and initializing the AGP device.
+ *
+ * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
+ * after the initialization for driver customization.
+ */
+int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
+{
+ struct pci_dev *pdev = NULL;
+ const struct pci_device_id *pid;
+ int i;
+
+ DRM_DEBUG("\n");
+
+ INIT_LIST_HEAD(&driver->device_list);
+ driver->kdriver.pci = pdriver;
+ driver->bus = &drm_pci_bus;
+
+ if (driver->driver_features & DRIVER_MODESET)
+ return pci_register_driver(pdriver);
+
+ /* If not using KMS, fall back to stealth mode manual scanning. */
+ for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
+ pid = &pdriver->id_table[i];
+
+ /* Loop around setting up a DRM device for each PCI device
+ * matching our ID and device class. If we had the internal
+ * function that pci_get_subsys and pci_get_class used, we'd
+ * be able to just pass pid in instead of doing a two-stage
+ * thing.
+ */
+ pdev = NULL;
+ while ((pdev =
+ pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
+ pid->subdevice, pdev)) != NULL) {
+ if ((pdev->class & pid->class_mask) != pid->class)
+ continue;
+
+ /* stealth mode requires a manual probe */
+ pci_dev_get(pdev);
+ drm_get_pci_dev(pdev, pid, driver);
+ }
+ }
+ return 0;
+}
+
+int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
+{
+ struct pci_dev *root;
+ u32 lnkcap, lnkcap2;
+
+ *mask = 0;
+ if (!dev->pdev)
+ return -EINVAL;
+
+ root = dev->pdev->bus->self;
+
+ /* we've been informed via and serverworks don't make the cut */
+ if (root->vendor == PCI_VENDOR_ID_VIA ||
+ root->vendor == PCI_VENDOR_ID_SERVERWORKS)
+ return -EINVAL;
+
+ pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
+ pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
+
+ if (lnkcap2) { /* PCIe r3.0-compliant */
+ if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
+ *mask |= DRM_PCIE_SPEED_25;
+ if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
+ *mask |= DRM_PCIE_SPEED_50;
+ if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
+ *mask |= DRM_PCIE_SPEED_80;
+ } else { /* pre-r3.0 */
+ if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
+ *mask |= DRM_PCIE_SPEED_25;
+ if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
+ *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
+ }
+
+ DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
+ return 0;
+}
+EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
+
+#else
+
+int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
+{
+ return -1;
+}
+
+#endif
+
+EXPORT_SYMBOL(drm_pci_init);
+
+/*@}*/
+void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
+{
+ struct drm_device *dev, *tmp;
+ DRM_DEBUG("\n");
+
+ if (driver->driver_features & DRIVER_MODESET) {
+ pci_unregister_driver(pdriver);
+ } else {
+ list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
+ drm_put_dev(dev);
+ }
+ DRM_INFO("Module unloaded\n");
+}
+EXPORT_SYMBOL(drm_pci_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 20:57:06 +0000