/*
* Copyright 2015 Red Hat Inc .
*
* 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 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 COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) 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 .
*
* Authors : Ben Skeggs < bskeggs @ redhat . com >
*/
#include "priv.h"
#include <core/pci.h>
static int
g84_pcie_version_supported(struct nvkm_pci *pci)
{
/* g84 and g86 report wrong information about what they support */
return 1 ;
}
int
g84_pcie_version(struct nvkm_pci *pci)
{
struct nvkm_device *device = pci->subdev.device;
return (nvkm_rd32(device, 0 x00154c) & 0 x1) + 1 ;
}
void
g84_pcie_set_version(struct nvkm_pci *pci, u8 ver)
{
struct nvkm_device *device = pci->subdev.device;
nvkm_mask(device, 0 x00154c, 0 x1, (ver >= 2 ? 0 x1 : 0 x0));
}
static void
g84_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
{
struct nvkm_device *device = pci->subdev.device;
nvkm_mask(device, 0 x00154c, 0 x80, full_speed ? 0 x80 : 0 x0);
}
enum nvkm_pcie_speed
g84_pcie_cur_speed(struct nvkm_pci *pci)
{
u32 reg_v = nvkm_pci_rd32(pci, 0 x88) & 0 x30000;
switch (reg_v) {
case 0 x30000:
return NVKM_PCIE_SPEED_8_0;
case 0 x20000:
return NVKM_PCIE_SPEED_5_0;
case 0 x10000:
default :
return NVKM_PCIE_SPEED_2_5;
}
}
enum nvkm_pcie_speed
g84_pcie_max_speed(struct nvkm_pci *pci)
{
u32 reg_v = nvkm_pci_rd32(pci, 0 x460) & 0 x3300;
if (reg_v == 0 x2200)
return NVKM_PCIE_SPEED_5_0;
return NVKM_PCIE_SPEED_2_5;
}
void
g84_pcie_set_link_speed(struct nvkm_pci *pci, enum nvkm_pcie_speed speed)
{
u32 mask_value;
if (speed == NVKM_PCIE_SPEED_5_0)
mask_value = 0 x20;
else
mask_value = 0 x10;
nvkm_pci_mask(pci, 0 x460, 0 x30, mask_value);
nvkm_pci_mask(pci, 0 x460, 0 x1, 0 x1);
}
int
g84_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
{
g84_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
g84_pcie_set_link_speed(pci, speed);
return 0 ;
}
void
g84_pci_init(struct nvkm_pci *pci)
{
/* The following only concerns PCIe cards. */
if (!pci_is_pcie(pci->pdev))
return ;
/* Tag field is 8-bit long, regardless of EXT_TAG.
* However , if EXT_TAG is disabled , only the lower 5 bits of the tag
* field should be used , limiting the number of request to 32 .
*
* Apparently , 0 x041c stores some limit on the number of requests
* possible , so if EXT_TAG is disabled , limit that requests number to
* 32
*
* Fixes fdo # 86537
*/
if (nvkm_pci_rd32(pci, 0 x007c) & 0 x00000020)
nvkm_pci_mask(pci, 0 x0080, 0 x00000100, 0 x00000100);
else
nvkm_pci_mask(pci, 0 x041c, 0 x00000060, 0 x00000000);
}
int
g84_pcie_init(struct nvkm_pci *pci)
{
bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
g84_pcie_set_cap_speed(pci, full_speed);
return 0 ;
}
static const struct nvkm_pci_func
g84_pci_func = {
.cfg = { .addr = 0 x088000, .size = 0 x1000 },
.init = g84_pci_init,
.msi_rearm = nv46_pci_msi_rearm,
.pcie.init = g84_pcie_init,
.pcie.set_link = g84_pcie_set_link,
.pcie.max_speed = g84_pcie_max_speed,
.pcie.cur_speed = g84_pcie_cur_speed,
.pcie.set_version = g84_pcie_set_version,
.pcie.version = g84_pcie_version,
.pcie.version_supported = g84_pcie_version_supported,
};
int
g84_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_pci **ppci)
{
return nvkm_pci_new_(&g84_pci_func, device, type, inst, ppci);
}
Messung V0.5 in Prozent C=98 H=100 G=98
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-07)
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