2 * Copyright 2003 José Fonseca.
3 * Copyright 2003 Leif Delgass.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include <drm/drm_legacy.h>
28 /**********************************************************************/
29 /** \name PCI memory */
33 drm_pci_busdma_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
35 drm_dma_handle_t *dmah = arg;
40 KASSERT(nsegs == 1, ("drm_pci_busdma_callback: bad dma segment count"));
41 dmah->busaddr = segs[0].ds_addr;
45 * \brief Allocate a PCI consistent memory block, for DMA.
47 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
49 drm_dma_handle_t *dmah;
52 /* pci_alloc_consistent only guarantees alignment to the smallest
53 * PAGE_SIZE order which is greater than or equal to the requested size.
54 * Return NULL here for now to make sure nobody tries for larger alignment
59 /* Need power-of-two alignment, so fail the allocation if it isn't. */
60 if ((align & (align - 1)) != 0) {
61 DRM_ERROR("drm_pci_alloc with non-power-of-two alignment %d\n",
66 dmah = kmalloc(sizeof(drm_dma_handle_t), M_DRM, M_WAITOK | M_NULLOK);
72 ret = bus_dma_tag_create(NULL, align, 0, /* tag, align, boundary */
73 ~0, BUS_SPACE_MAXADDR, /* lowaddr, highaddr */
74 NULL, NULL, /* filtfunc, filtfuncargs */
75 size, 1, size, /* maxsize, nsegs, maxsegsize */
79 drm_free(dmah, M_DRM);
83 ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr,
84 BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_NOCACHE, &dmah->map);
86 bus_dma_tag_destroy(dmah->tag);
87 drm_free(dmah, M_DRM);
91 ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr, size,
92 drm_pci_busdma_callback, dmah, BUS_DMA_NOWAIT);
94 bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
95 bus_dma_tag_destroy(dmah->tag);
96 drm_free(dmah, M_DRM);
100 memset(dmah->vaddr, 0, size);
106 * Free a PCI consistent memory block without freeing its descriptor.
108 * This function is for internal use in the Linux-specific DRM core code.
110 void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
115 bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
116 bus_dma_tag_destroy(dmah->tag);
120 * drm_pci_free - Free a PCI consistent memory block
122 * @dmah: handle to memory block
124 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
126 __drm_legacy_pci_free(dev, dmah);
130 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
134 u32 lnkcap = 0, lnkcap2 = 0;
137 if (!drm_device_is_pcie(dev))
140 root = device_get_parent(dev->dev);
143 pci_find_extcap(root, PCIY_EXPRESS, &pos);
147 /* we've been informed via and serverworks don't make the cut */
148 if (pci_get_vendor(root) == PCI_VENDOR_ID_VIA ||
149 pci_get_vendor(root) == PCI_VENDOR_ID_SERVERWORKS)
152 lnkcap = pci_read_config(root, pos + PCIER_LINKCAP, 4);
153 lnkcap2 = pci_read_config(root, pos + PCIER_LINK_CAP2, 4);
155 lnkcap &= PCIEM_LNKCAP_SPEED_MASK;
158 #define PCI_EXP_LNKCAP2_SLS_2_5GB 0x02 /* Supported Link Speed 2.5GT/s */
159 #define PCI_EXP_LNKCAP2_SLS_5_0GB 0x04 /* Supported Link Speed 5.0GT/s */
160 #define PCI_EXP_LNKCAP2_SLS_8_0GB 0x08 /* Supported Link Speed 8.0GT/s */
162 if (lnkcap2) { /* PCIE GEN 3.0 */
163 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
164 *mask |= DRM_PCIE_SPEED_25;
165 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
166 *mask |= DRM_PCIE_SPEED_50;
167 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
168 *mask |= DRM_PCIE_SPEED_80;
171 *mask |= DRM_PCIE_SPEED_25;
173 *mask |= DRM_PCIE_SPEED_50;
176 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", pci_get_vendor(root), pci_get_device(root), lnkcap, lnkcap2);
181 * Get interrupt from bus id.
183 * \param inode device inode.
184 * \param file_priv DRM file private.
185 * \param cmd command.
186 * \param arg user argument, pointing to a drm_irq_busid structure.
187 * \return zero on success or a negative number on failure.
189 * Finds the PCI device with the specified bus id and gets its IRQ number.
190 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
191 * to that of the device that this DRM instance attached to.
193 int drm_irq_by_busid(struct drm_device *dev, void *data,
194 struct drm_file *file_priv)
196 struct drm_irq_busid *irq = data;
198 if ((irq->busnum >> 8) != dev->pci_domain ||
199 (irq->busnum & 0xff) != dev->pci_bus ||
200 irq->devnum != dev->pci_slot ||
201 irq->funcnum != dev->pci_func)
206 DRM_DEBUG("%d:%d:%d => IRQ %d\n",
207 irq->busnum, irq->devnum, irq->funcnum, irq->irq);