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/*
* Copyright 2013 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
*/
#include "priv.h"
#include "fuc/gt215.fuc3.h"
#include <subdev/timer.h>
int
gt215_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
u32 process, u32 message, u32 data0, u32 data1)
{
struct nvkm_subdev *subdev = &pmu->subdev;
struct nvkm_device *device = subdev->device;
u32 addr;
mutex_lock(&subdev->mutex);
/* wait for a free slot in the fifo */
addr = nvkm_rd32(device, 0x10a4a0);
if (nvkm_msec(device, 2000,
u32 tmp = nvkm_rd32(device, 0x10a4b0);
if (tmp != (addr ^ 8))
break;
) < 0) {
mutex_unlock(&subdev->mutex);
return -EBUSY;
}
/* we currently only support a single process at a time waiting
* on a synchronous reply, take the PMU mutex and tell the
* receive handler what we're waiting for
*/
if (reply) {
pmu->recv.message = message;
pmu->recv.process = process;
}
/* acquire data segment access */
do {
nvkm_wr32(device, 0x10a580, 0x00000001);
} while (nvkm_rd32(device, 0x10a580) != 0x00000001);
/* write the packet */
nvkm_wr32(device, 0x10a1c0, 0x01000000 | (((addr & 0x07) << 4) +
pmu->send.base));
nvkm_wr32(device, 0x10a1c4, process);
nvkm_wr32(device, 0x10a1c4, message);
nvkm_wr32(device, 0x10a1c4, data0);
nvkm_wr32(device, 0x10a1c4, data1);
nvkm_wr32(device, 0x10a4a0, (addr + 1) & 0x0f);
/* release data segment access */
nvkm_wr32(device, 0x10a580, 0x00000000);
/* wait for reply, if requested */
if (reply) {
wait_event(pmu->recv.wait, (pmu->recv.process == 0));
reply[0] = pmu->recv.data[0];
reply[1] = pmu->recv.data[1];
}
mutex_unlock(&subdev->mutex);
return 0;
}
void
gt215_pmu_recv(struct nvkm_pmu *pmu)
{
struct nvkm_subdev *subdev = &pmu->subdev;
struct nvkm_device *device = subdev->device;
u32 process, message, data0, data1;
/* nothing to do if GET == PUT */
u32 addr = nvkm_rd32(device, 0x10a4cc);
if (addr == nvkm_rd32(device, 0x10a4c8))
return;
/* acquire data segment access */
do {
nvkm_wr32(device, 0x10a580, 0x00000002);
} while (nvkm_rd32(device, 0x10a580) != 0x00000002);
/* read the packet */
nvkm_wr32(device, 0x10a1c0, 0x02000000 | (((addr & 0x07) << 4) +
pmu->recv.base));
process = nvkm_rd32(device, 0x10a1c4);
message = nvkm_rd32(device, 0x10a1c4);
data0 = nvkm_rd32(device, 0x10a1c4);
data1 = nvkm_rd32(device, 0x10a1c4);
nvkm_wr32(device, 0x10a4cc, (addr + 1) & 0x0f);
/* release data segment access */
nvkm_wr32(device, 0x10a580, 0x00000000);
/* wake process if it's waiting on a synchronous reply */
if (pmu->recv.process) {
if (process == pmu->recv.process &&
message == pmu->recv.message) {
pmu->recv.data[0] = data0;
pmu->recv.data[1] = data1;
pmu->recv.process = 0;
wake_up(&pmu->recv.wait);
return;
}
}
/* right now there's no other expected responses from the engine,
* so assume that any unexpected message is an error.
*/
nvkm_warn(subdev, "%c%c%c%c %08x %08x %08x %08x\n",
(char)((process & 0x000000ff) >> 0),
(char)((process & 0x0000ff00) >> 8),
(char)((process & 0x00ff0000) >> 16),
(char)((process & 0xff000000) >> 24),
process, message, data0, data1);
}
void
gt215_pmu_intr(struct nvkm_pmu *pmu)
{
struct nvkm_subdev *subdev = &pmu->subdev;
struct nvkm_device *device = subdev->device;
u32 disp = nvkm_rd32(device, 0x10a01c);
u32 intr = nvkm_rd32(device, 0x10a008) & disp & ~(disp >> 16);
if (intr & 0x00000020) {
u32 stat = nvkm_rd32(device, 0x10a16c);
if (stat & 0x80000000) {
nvkm_error(subdev, "UAS fault at %06x addr %08x\n",
stat & 0x00ffffff,
nvkm_rd32(device, 0x10a168));
nvkm_wr32(device, 0x10a16c, 0x00000000);
intr &= ~0x00000020;
}
}
if (intr & 0x00000040) {
schedule_work(&pmu->recv.work);
nvkm_wr32(device, 0x10a004, 0x00000040);
intr &= ~0x00000040;
}
if (intr & 0x00000080) {
nvkm_info(subdev, "wr32 %06x %08x\n",
nvkm_rd32(device, 0x10a7a0),
nvkm_rd32(device, 0x10a7a4));
nvkm_wr32(device, 0x10a004, 0x00000080);
intr &= ~0x00000080;
}
if (intr) {
nvkm_error(subdev, "intr %08x\n", intr);
nvkm_wr32(device, 0x10a004, intr);
}
}
void
gt215_pmu_fini(struct nvkm_pmu *pmu)
{
nvkm_wr32(pmu->subdev.device, 0x10a014, 0x00000060);
}
void
gt215_pmu_reset(struct nvkm_pmu *pmu)
{
struct nvkm_device *device = pmu->subdev.device;
nvkm_mask(device, 0x000200, 0x00002000, 0x00000000);
nvkm_mask(device, 0x000200, 0x00002000, 0x00002000);
nvkm_rd32(device, 0x000200);
}
int
gt215_pmu_init(struct nvkm_pmu *pmu)
{
struct nvkm_device *device = pmu->subdev.device;
int i;
/* upload data segment */
nvkm_wr32(device, 0x10a1c0, 0x01000000);
for (i = 0; i < pmu->func->data.size / 4; i++)
nvkm_wr32(device, 0x10a1c4, pmu->func->data.data[i]);
/* upload code segment */
nvkm_wr32(device, 0x10a180, 0x01000000);
for (i = 0; i < pmu->func->code.size / 4; i++) {
if ((i & 0x3f) == 0)
nvkm_wr32(device, 0x10a188, i >> 6);
nvkm_wr32(device, 0x10a184, pmu->func->code.data[i]);
}
/* start it running */
nvkm_wr32(device, 0x10a10c, 0x00000000);
nvkm_wr32(device, 0x10a104, 0x00000000);
nvkm_wr32(device, 0x10a100, 0x00000002);
/* wait for valid host->pmu ring configuration */
if (nvkm_msec(device, 2000,
if (nvkm_rd32(device, 0x10a4d0))
break;
) < 0)
return -EBUSY;
pmu->send.base = nvkm_rd32(device, 0x10a4d0) & 0x0000ffff;
pmu->send.size = nvkm_rd32(device, 0x10a4d0) >> 16;
/* wait for valid pmu->host ring configuration */
if (nvkm_msec(device, 2000,
if (nvkm_rd32(device, 0x10a4dc))
break;
) < 0)
return -EBUSY;
pmu->recv.base = nvkm_rd32(device, 0x10a4dc) & 0x0000ffff;
pmu->recv.size = nvkm_rd32(device, 0x10a4dc) >> 16;
nvkm_wr32(device, 0x10a010, 0x000000e0);
return 0;
}
static const struct nvkm_pmu_func
gt215_pmu = {
.code.data = gt215_pmu_code,
.code.size = sizeof(gt215_pmu_code),
.data.data = gt215_pmu_data,
.data.size = sizeof(gt215_pmu_data),
.reset = gt215_pmu_reset,
.init = gt215_pmu_init,
.fini = gt215_pmu_fini,
.intr = gt215_pmu_intr,
.send = gt215_pmu_send,
.recv = gt215_pmu_recv,
};
int
gt215_pmu_new(struct nvkm_device *device, int index, struct nvkm_pmu **ppmu)
{
return nvkm_pmu_new_(>215_pmu, device, index, ppmu);
}
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