--- /dev/null
+/*
+ * 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 <subdev/timer.h>
+
+void
+nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
+{
+ const struct nvkm_pmu_impl *impl = (void *)nv_oclass(pmu);
+ if (impl->pgob)
+ impl->pgob(pmu, enable);
+}
+
+static int
+nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
+ u32 process, u32 message, u32 data0, u32 data1)
+{
+ struct nvkm_subdev *subdev = nv_subdev(pmu);
+ u32 addr;
+
+ /* wait for a free slot in the fifo */
+ addr = nv_rd32(pmu, 0x10a4a0);
+ if (!nv_wait_ne(pmu, 0x10a4b0, 0xffffffff, addr ^ 8))
+ 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) {
+ mutex_lock(&subdev->mutex);
+ pmu->recv.message = message;
+ pmu->recv.process = process;
+ }
+
+ /* acquire data segment access */
+ do {
+ nv_wr32(pmu, 0x10a580, 0x00000001);
+ } while (nv_rd32(pmu, 0x10a580) != 0x00000001);
+
+ /* write the packet */
+ nv_wr32(pmu, 0x10a1c0, 0x01000000 | (((addr & 0x07) << 4) +
+ pmu->send.base));
+ nv_wr32(pmu, 0x10a1c4, process);
+ nv_wr32(pmu, 0x10a1c4, message);
+ nv_wr32(pmu, 0x10a1c4, data0);
+ nv_wr32(pmu, 0x10a1c4, data1);
+ nv_wr32(pmu, 0x10a4a0, (addr + 1) & 0x0f);
+
+ /* release data segment access */
+ nv_wr32(pmu, 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;
+}
+
+static void
+nvkm_pmu_recv(struct work_struct *work)
+{
+ struct nvkm_pmu *pmu = container_of(work, struct nvkm_pmu, recv.work);
+ u32 process, message, data0, data1;
+
+ /* nothing to do if GET == PUT */
+ u32 addr = nv_rd32(pmu, 0x10a4cc);
+ if (addr == nv_rd32(pmu, 0x10a4c8))
+ return;
+
+ /* acquire data segment access */
+ do {
+ nv_wr32(pmu, 0x10a580, 0x00000002);
+ } while (nv_rd32(pmu, 0x10a580) != 0x00000002);
+
+ /* read the packet */
+ nv_wr32(pmu, 0x10a1c0, 0x02000000 | (((addr & 0x07) << 4) +
+ pmu->recv.base));
+ process = nv_rd32(pmu, 0x10a1c4);
+ message = nv_rd32(pmu, 0x10a1c4);
+ data0 = nv_rd32(pmu, 0x10a1c4);
+ data1 = nv_rd32(pmu, 0x10a1c4);
+ nv_wr32(pmu, 0x10a4cc, (addr + 1) & 0x0f);
+
+ /* release data segment access */
+ nv_wr32(pmu, 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.
+ */
+ nv_warn(pmu, "%c%c%c%c 0x%08x 0x%08x 0x%08x 0x%08x\n",
+ (char)((process & 0x000000ff) >> 0),
+ (char)((process & 0x0000ff00) >> 8),
+ (char)((process & 0x00ff0000) >> 16),
+ (char)((process & 0xff000000) >> 24),
+ process, message, data0, data1);
+}
+
+static void
+nvkm_pmu_intr(struct nvkm_subdev *subdev)
+{
+ struct nvkm_pmu *pmu = (void *)subdev;
+ u32 disp = nv_rd32(pmu, 0x10a01c);
+ u32 intr = nv_rd32(pmu, 0x10a008) & disp & ~(disp >> 16);
+
+ if (intr & 0x00000020) {
+ u32 stat = nv_rd32(pmu, 0x10a16c);
+ if (stat & 0x80000000) {
+ nv_error(pmu, "UAS fault at 0x%06x addr 0x%08x\n",
+ stat & 0x00ffffff, nv_rd32(pmu, 0x10a168));
+ nv_wr32(pmu, 0x10a16c, 0x00000000);
+ intr &= ~0x00000020;
+ }
+ }
+
+ if (intr & 0x00000040) {
+ schedule_work(&pmu->recv.work);
+ nv_wr32(pmu, 0x10a004, 0x00000040);
+ intr &= ~0x00000040;
+ }
+
+ if (intr & 0x00000080) {
+ nv_info(pmu, "wr32 0x%06x 0x%08x\n", nv_rd32(pmu, 0x10a7a0),
+ nv_rd32(pmu, 0x10a7a4));
+ nv_wr32(pmu, 0x10a004, 0x00000080);
+ intr &= ~0x00000080;
+ }
+
+ if (intr) {
+ nv_error(pmu, "intr 0x%08x\n", intr);
+ nv_wr32(pmu, 0x10a004, intr);
+ }
+}
+
+int
+_nvkm_pmu_fini(struct nvkm_object *object, bool suspend)
+{
+ struct nvkm_pmu *pmu = (void *)object;
+
+ nv_wr32(pmu, 0x10a014, 0x00000060);
+ flush_work(&pmu->recv.work);
+
+ return nvkm_subdev_fini(&pmu->base, suspend);
+}
+
+int
+_nvkm_pmu_init(struct nvkm_object *object)
+{
+ const struct nvkm_pmu_impl *impl = (void *)object->oclass;
+ struct nvkm_pmu *pmu = (void *)object;
+ int ret, i;
+
+ ret = nvkm_subdev_init(&pmu->base);
+ if (ret)
+ return ret;
+
+ nv_subdev(pmu)->intr = nvkm_pmu_intr;
+ pmu->message = nvkm_pmu_send;
+ pmu->pgob = nvkm_pmu_pgob;
+
+ /* prevent previous ucode from running, wait for idle, reset */
+ nv_wr32(pmu, 0x10a014, 0x0000ffff); /* INTR_EN_CLR = ALL */
+ nv_wait(pmu, 0x10a04c, 0xffffffff, 0x00000000);
+ nv_mask(pmu, 0x000200, 0x00002000, 0x00000000);
+ nv_mask(pmu, 0x000200, 0x00002000, 0x00002000);
+ nv_rd32(pmu, 0x000200);
+ nv_wait(pmu, 0x10a10c, 0x00000006, 0x00000000);
+
+ /* upload data segment */
+ nv_wr32(pmu, 0x10a1c0, 0x01000000);
+ for (i = 0; i < impl->data.size / 4; i++)
+ nv_wr32(pmu, 0x10a1c4, impl->data.data[i]);
+
+ /* upload code segment */
+ nv_wr32(pmu, 0x10a180, 0x01000000);
+ for (i = 0; i < impl->code.size / 4; i++) {
+ if ((i & 0x3f) == 0)
+ nv_wr32(pmu, 0x10a188, i >> 6);
+ nv_wr32(pmu, 0x10a184, impl->code.data[i]);
+ }
+
+ /* start it running */
+ nv_wr32(pmu, 0x10a10c, 0x00000000);
+ nv_wr32(pmu, 0x10a104, 0x00000000);
+ nv_wr32(pmu, 0x10a100, 0x00000002);
+
+ /* wait for valid host->pmu ring configuration */
+ if (!nv_wait_ne(pmu, 0x10a4d0, 0xffffffff, 0x00000000))
+ return -EBUSY;
+ pmu->send.base = nv_rd32(pmu, 0x10a4d0) & 0x0000ffff;
+ pmu->send.size = nv_rd32(pmu, 0x10a4d0) >> 16;
+
+ /* wait for valid pmu->host ring configuration */
+ if (!nv_wait_ne(pmu, 0x10a4dc, 0xffffffff, 0x00000000))
+ return -EBUSY;
+ pmu->recv.base = nv_rd32(pmu, 0x10a4dc) & 0x0000ffff;
+ pmu->recv.size = nv_rd32(pmu, 0x10a4dc) >> 16;
+
+ nv_wr32(pmu, 0x10a010, 0x000000e0);
+ return 0;
+}
+
+int
+nvkm_pmu_create_(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, int length, void **pobject)
+{
+ struct nvkm_pmu *pmu;
+ int ret;
+
+ ret = nvkm_subdev_create_(parent, engine, oclass, 0, "PMU",
+ "pmu", length, pobject);
+ pmu = *pobject;
+ if (ret)
+ return ret;
+
+ INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
+ init_waitqueue_head(&pmu->recv.wait);
+ return 0;
+}
+
+int
+_nvkm_pmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, void *data, u32 size,
+ struct nvkm_object **pobject)
+{
+ struct nvkm_pmu *pmu;
+ int ret = nvkm_pmu_create(parent, engine, oclass, &pmu);
+ *pobject = nv_object(pmu);
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff