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2f194646fe
This contains the last patches in Loic's remoteproc resource table handling changes, a number of updates to documentation, support for invoking the crash handler (for testing purposes), a fix for the handling of virtio devices during recovery, performance state votes in Qualcomm modem driver, support for specifying board specific firmware path for Qualcomm modem driver and improved support for graceful shutdown of Qualcomm remoteprocs. -----BEGIN PGP SIGNATURE----- iQJPBAABCAA5FiEEBd4DzF816k8JZtUlCx85Pw2ZrcUFAlyJS1kbHGJqb3JuLmFu ZGVyc3NvbkBsaW5hcm8ub3JnAAoJEAsfOT8Nma3FgtYP/RGxDkPOAXZmJSlurz+Z syWop/9s1nLqkSVtXDZ6pthuPtHrQEyAIOfdCbot6X0ZCuAzTnhtdJUzMFlXMBrd MDwdwxZEobr1bngz8VENrt1Lny0oy6Zm8ajyr/+xdb3Xw74mcmJ7UDjyIh1w8YPm QA6acCYCzRBIwskhlBSqVT2Mf8imAXr1bBV2nh5ngS9+5r1UkGO4/dnXs8mZQRWU ZaIfWT9kN2cIxHQH5c5bHCaYP/dmoz5FGyBVYq4OZSuFq+ziG3dQ+VA3YJFv7yUI /3P9r4VEJYpR8Tg08lG6SvEtvZ0e0zdtNX0FzYYF8KnpSjB3Vf8k5u/RNnZRn33v k5QQivC+YGpG7Rwy1pgyNtZQ881KsmN6JVQxT1rm6ddriSl4TnQXO32lswD2YmM4 Gt/+Sgu18KEa1ASbOUQk/cRS8Zr3kg2+xDrgBh+Sp0265t+6V9/cGb+PJKkJn9RD HRE3fXDdQRwEmp/rhx03kSdlhbfg5A9mTLxb/T5kBR/nC1qLYZV592mvBZS08imk 7T2zquqP+anwKDOLE++PgJbx6nlzFnPqDTjzohHWns5MfYSGEHagQ21IrDJuzkhG nr2r1Gpwkl1dDarvAgYUMCcWGCWvSrUpLfbKYR9QaKWo1JTTDbocBIFF8j7a+eVf EiKlGv7SX1LUpXk4K+WabbCr =4xC9 -----END PGP SIGNATURE----- Merge tag 'rproc-v5.1' of git://github.com/andersson/remoteproc Pull remoteproc updates from Bjorn Andersson: "This contains the last patches in Loic's remoteproc resource table handling changes, a number of updates to documentation, support for invoking the crash handler (for testing purposes), a fix for the handling of virtio devices during recovery, performance state votes in Qualcomm modem driver, support for specifying board specific firmware path for Qualcomm modem driver and improved support for graceful shutdown of Qualcomm remoteprocs" * tag 'rproc-v5.1' of git://github.com/andersson/remoteproc: (33 commits) remoteproc: fix for "dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag" remoteproc: fix rproc_check_carveout_da() returned error and comments remoteproc: fix trace buffer va initialization remoteproc: fix rproc_alloc_carveout() for rproc with iommu domain remoteproc: add warning on resource table cast remoteproc: fix rproc_alloc_carveout() bad variable cast remoteproc: fix rproc_da_to_va in case of unallocated carveout remoteproc: correct rproc_mem_entry_init() comments remoteproc: fix recovery procedure rpmsg: virtio: change header file sort style rpmsg: virtio: allocate buffer from parent remoteproc: st: add reserved memory support remoteproc: create vdev subdevice with specific dma memory pool remoteproc: q6v5_adsp: Remove voting for lpass_aon clock dt-binding: remoteproc: Remove lpass_aon clock from adsp pil clock list remoteproc: q6v5-mss: Active powerdomain for SDM845 remoteproc: q6v5-mss: Vote for rpmh power domains remoteproc: qcom: Add support for parsing fw dt bindings remoteproc: qcom_q6v5: don't auto boot remote processor remoteproc: qcom: Wait for shutdown-ack/ind on sysmon shutdown ...
432 lines
11 KiB
C
432 lines
11 KiB
C
/*
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* Remote processor messaging transport (OMAP platform-specific bits)
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2011 Google, Inc.
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*
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* Ohad Ben-Cohen <ohad@wizery.com>
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* Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/export.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/remoteproc.h>
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#include <linux/virtio.h>
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#include <linux/virtio_config.h>
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#include <linux/virtio_ids.h>
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#include <linux/virtio_ring.h>
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#include <linux/err.h>
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#include <linux/kref.h>
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#include <linux/slab.h>
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#include "remoteproc_internal.h"
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/* kick the remote processor, and let it know which virtqueue to poke at */
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static bool rproc_virtio_notify(struct virtqueue *vq)
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{
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struct rproc_vring *rvring = vq->priv;
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struct rproc *rproc = rvring->rvdev->rproc;
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int notifyid = rvring->notifyid;
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dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid);
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rproc->ops->kick(rproc, notifyid);
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return true;
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}
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/**
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* rproc_vq_interrupt() - tell remoteproc that a virtqueue is interrupted
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* @rproc: handle to the remote processor
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* @notifyid: index of the signalled virtqueue (unique per this @rproc)
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*
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* This function should be called by the platform-specific rproc driver,
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* when the remote processor signals that a specific virtqueue has pending
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* messages available.
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*
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* Returns IRQ_NONE if no message was found in the @notifyid virtqueue,
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* and otherwise returns IRQ_HANDLED.
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*/
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irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int notifyid)
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{
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struct rproc_vring *rvring;
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dev_dbg(&rproc->dev, "vq index %d is interrupted\n", notifyid);
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rvring = idr_find(&rproc->notifyids, notifyid);
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if (!rvring || !rvring->vq)
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return IRQ_NONE;
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return vring_interrupt(0, rvring->vq);
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}
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EXPORT_SYMBOL(rproc_vq_interrupt);
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static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
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unsigned int id,
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void (*callback)(struct virtqueue *vq),
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const char *name, bool ctx)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct rproc *rproc = vdev_to_rproc(vdev);
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struct device *dev = &rproc->dev;
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struct rproc_mem_entry *mem;
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struct rproc_vring *rvring;
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struct fw_rsc_vdev *rsc;
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struct virtqueue *vq;
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void *addr;
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int len, size;
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/* we're temporarily limited to two virtqueues per rvdev */
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if (id >= ARRAY_SIZE(rvdev->vring))
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return ERR_PTR(-EINVAL);
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if (!name)
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return NULL;
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/* Search allocated memory region by name */
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mem = rproc_find_carveout_by_name(rproc, "vdev%dvring%d", rvdev->index,
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id);
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if (!mem || !mem->va)
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return ERR_PTR(-ENOMEM);
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rvring = &rvdev->vring[id];
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addr = mem->va;
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len = rvring->len;
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/* zero vring */
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size = vring_size(len, rvring->align);
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memset(addr, 0, size);
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dev_dbg(dev, "vring%d: va %pK qsz %d notifyid %d\n",
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id, addr, len, rvring->notifyid);
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/*
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* Create the new vq, and tell virtio we're not interested in
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* the 'weak' smp barriers, since we're talking with a real device.
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*/
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vq = vring_new_virtqueue(id, len, rvring->align, vdev, false, ctx,
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addr, rproc_virtio_notify, callback, name);
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if (!vq) {
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dev_err(dev, "vring_new_virtqueue %s failed\n", name);
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rproc_free_vring(rvring);
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return ERR_PTR(-ENOMEM);
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}
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rvring->vq = vq;
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vq->priv = rvring;
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/* Update vring in resource table */
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rsc = (void *)rproc->table_ptr + rvdev->rsc_offset;
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rsc->vring[id].da = mem->da;
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return vq;
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}
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static void __rproc_virtio_del_vqs(struct virtio_device *vdev)
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{
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struct virtqueue *vq, *n;
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struct rproc_vring *rvring;
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list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
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rvring = vq->priv;
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rvring->vq = NULL;
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vring_del_virtqueue(vq);
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}
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}
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static void rproc_virtio_del_vqs(struct virtio_device *vdev)
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{
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__rproc_virtio_del_vqs(vdev);
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}
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static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
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struct virtqueue *vqs[],
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vq_callback_t *callbacks[],
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const char * const names[],
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const bool * ctx,
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struct irq_affinity *desc)
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{
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int i, ret, queue_idx = 0;
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for (i = 0; i < nvqs; ++i) {
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if (!names[i]) {
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vqs[i] = NULL;
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continue;
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}
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vqs[i] = rp_find_vq(vdev, queue_idx++, callbacks[i], names[i],
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ctx ? ctx[i] : false);
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if (IS_ERR(vqs[i])) {
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ret = PTR_ERR(vqs[i]);
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goto error;
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}
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}
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return 0;
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error:
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__rproc_virtio_del_vqs(vdev);
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return ret;
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}
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static u8 rproc_virtio_get_status(struct virtio_device *vdev)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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return rsc->status;
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}
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static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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rsc->status = status;
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dev_dbg(&vdev->dev, "status: %d\n", status);
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}
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static void rproc_virtio_reset(struct virtio_device *vdev)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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rsc->status = 0;
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dev_dbg(&vdev->dev, "reset !\n");
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}
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/* provide the vdev features as retrieved from the firmware */
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static u64 rproc_virtio_get_features(struct virtio_device *vdev)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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return rsc->dfeatures;
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}
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static void rproc_transport_features(struct virtio_device *vdev)
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{
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/*
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* Packed ring isn't enabled on remoteproc for now,
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* because remoteproc uses vring_new_virtqueue() which
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* creates virtio rings on preallocated memory.
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*/
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__virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED);
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}
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static int rproc_virtio_finalize_features(struct virtio_device *vdev)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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/* Give virtio_ring a chance to accept features */
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vring_transport_features(vdev);
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/* Give virtio_rproc a chance to accept features. */
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rproc_transport_features(vdev);
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/* Make sure we don't have any features > 32 bits! */
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BUG_ON((u32)vdev->features != vdev->features);
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/*
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* Remember the finalized features of our vdev, and provide it
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* to the remote processor once it is powered on.
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*/
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rsc->gfeatures = vdev->features;
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return 0;
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}
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static void rproc_virtio_get(struct virtio_device *vdev, unsigned int offset,
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void *buf, unsigned int len)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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void *cfg;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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cfg = &rsc->vring[rsc->num_of_vrings];
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if (offset + len > rsc->config_len || offset + len < len) {
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dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n");
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return;
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}
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memcpy(buf, cfg + offset, len);
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}
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static void rproc_virtio_set(struct virtio_device *vdev, unsigned int offset,
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const void *buf, unsigned int len)
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{
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct fw_rsc_vdev *rsc;
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void *cfg;
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rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
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cfg = &rsc->vring[rsc->num_of_vrings];
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if (offset + len > rsc->config_len || offset + len < len) {
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dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n");
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return;
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}
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memcpy(cfg + offset, buf, len);
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}
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static const struct virtio_config_ops rproc_virtio_config_ops = {
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.get_features = rproc_virtio_get_features,
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.finalize_features = rproc_virtio_finalize_features,
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.find_vqs = rproc_virtio_find_vqs,
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.del_vqs = rproc_virtio_del_vqs,
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.reset = rproc_virtio_reset,
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.set_status = rproc_virtio_set_status,
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.get_status = rproc_virtio_get_status,
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.get = rproc_virtio_get,
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.set = rproc_virtio_set,
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};
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/*
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* This function is called whenever vdev is released, and is responsible
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* to decrement the remote processor's refcount which was taken when vdev was
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* added.
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*
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* Never call this function directly; it will be called by the driver
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* core when needed.
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*/
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static void rproc_virtio_dev_release(struct device *dev)
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{
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struct virtio_device *vdev = dev_to_virtio(dev);
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struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
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struct rproc *rproc = vdev_to_rproc(vdev);
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kfree(vdev);
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kref_put(&rvdev->refcount, rproc_vdev_release);
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put_device(&rproc->dev);
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}
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/**
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* rproc_add_virtio_dev() - register an rproc-induced virtio device
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* @rvdev: the remote vdev
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*
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* This function registers a virtio device. This vdev's partent is
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* the rproc device.
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*
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* Returns 0 on success or an appropriate error value otherwise.
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*/
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int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
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{
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struct rproc *rproc = rvdev->rproc;
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struct device *dev = &rvdev->dev;
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struct virtio_device *vdev;
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struct rproc_mem_entry *mem;
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int ret;
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/* Try to find dedicated vdev buffer carveout */
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mem = rproc_find_carveout_by_name(rproc, "vdev%dbuffer", rvdev->index);
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if (mem) {
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phys_addr_t pa;
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if (mem->of_resm_idx != -1) {
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struct device_node *np = rproc->dev.parent->of_node;
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/* Associate reserved memory to vdev device */
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ret = of_reserved_mem_device_init_by_idx(dev, np,
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mem->of_resm_idx);
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if (ret) {
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dev_err(dev, "Can't associate reserved memory\n");
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goto out;
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}
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} else {
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if (mem->va) {
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dev_warn(dev, "vdev %d buffer already mapped\n",
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rvdev->index);
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pa = rproc_va_to_pa(mem->va);
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} else {
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/* Use dma address as carveout no memmapped yet */
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pa = (phys_addr_t)mem->dma;
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}
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/* Associate vdev buffer memory pool to vdev subdev */
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ret = dma_declare_coherent_memory(dev, pa,
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mem->da,
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mem->len);
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if (ret < 0) {
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dev_err(dev, "Failed to associate buffer\n");
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goto out;
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}
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}
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}
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/* Allocate virtio device */
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vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
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if (!vdev) {
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ret = -ENOMEM;
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goto out;
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}
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vdev->id.device = id,
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vdev->config = &rproc_virtio_config_ops,
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vdev->dev.parent = dev;
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vdev->dev.release = rproc_virtio_dev_release;
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/*
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* We're indirectly making a non-temporary copy of the rproc pointer
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* here, because drivers probed with this vdev will indirectly
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* access the wrapping rproc.
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*
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* Therefore we must increment the rproc refcount here, and decrement
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* it _only_ when the vdev is released.
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*/
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get_device(&rproc->dev);
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/* Reference the vdev and vring allocations */
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kref_get(&rvdev->refcount);
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ret = register_virtio_device(vdev);
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if (ret) {
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put_device(&vdev->dev);
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dev_err(dev, "failed to register vdev: %d\n", ret);
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goto out;
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}
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dev_info(dev, "registered %s (type %d)\n", dev_name(&vdev->dev), id);
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out:
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return ret;
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}
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/**
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* rproc_remove_virtio_dev() - remove an rproc-induced virtio device
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* @dev: the virtio device
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* @data: must be null
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*
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* This function unregisters an existing virtio device.
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*/
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int rproc_remove_virtio_dev(struct device *dev, void *data)
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{
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struct virtio_device *vdev = dev_to_virtio(dev);
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unregister_virtio_device(vdev);
|
|
return 0;
|
|
}
|