1400e64dfSOhad Ben-Cohen /* 2400e64dfSOhad Ben-Cohen * Remote Processor Framework 3400e64dfSOhad Ben-Cohen * 4400e64dfSOhad Ben-Cohen * Copyright (C) 2011 Texas Instruments, Inc. 5400e64dfSOhad Ben-Cohen * Copyright (C) 2011 Google, Inc. 6400e64dfSOhad Ben-Cohen * 7400e64dfSOhad Ben-Cohen * Ohad Ben-Cohen <ohad@wizery.com> 8400e64dfSOhad Ben-Cohen * Brian Swetland <swetland@google.com> 9400e64dfSOhad Ben-Cohen * Mark Grosen <mgrosen@ti.com> 10400e64dfSOhad Ben-Cohen * Fernando Guzman Lugo <fernando.lugo@ti.com> 11400e64dfSOhad Ben-Cohen * Suman Anna <s-anna@ti.com> 12400e64dfSOhad Ben-Cohen * Robert Tivy <rtivy@ti.com> 13400e64dfSOhad Ben-Cohen * Armando Uribe De Leon <x0095078@ti.com> 14400e64dfSOhad Ben-Cohen * 15400e64dfSOhad Ben-Cohen * This program is free software; you can redistribute it and/or 16400e64dfSOhad Ben-Cohen * modify it under the terms of the GNU General Public License 17400e64dfSOhad Ben-Cohen * version 2 as published by the Free Software Foundation. 18400e64dfSOhad Ben-Cohen * 19400e64dfSOhad Ben-Cohen * This program is distributed in the hope that it will be useful, 20400e64dfSOhad Ben-Cohen * but WITHOUT ANY WARRANTY; without even the implied warranty of 21400e64dfSOhad Ben-Cohen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22400e64dfSOhad Ben-Cohen * GNU General Public License for more details. 23400e64dfSOhad Ben-Cohen */ 24400e64dfSOhad Ben-Cohen 25400e64dfSOhad Ben-Cohen #define pr_fmt(fmt) "%s: " fmt, __func__ 26400e64dfSOhad Ben-Cohen 27400e64dfSOhad Ben-Cohen #include <linux/kernel.h> 28400e64dfSOhad Ben-Cohen #include <linux/module.h> 29400e64dfSOhad Ben-Cohen #include <linux/device.h> 30400e64dfSOhad Ben-Cohen #include <linux/slab.h> 31400e64dfSOhad Ben-Cohen #include <linux/mutex.h> 32400e64dfSOhad Ben-Cohen #include <linux/dma-mapping.h> 33400e64dfSOhad Ben-Cohen #include <linux/firmware.h> 34400e64dfSOhad Ben-Cohen #include <linux/string.h> 35400e64dfSOhad Ben-Cohen #include <linux/debugfs.h> 362666ca91SSarangdhar Joshi #include <linux/devcoredump.h> 37400e64dfSOhad Ben-Cohen #include <linux/remoteproc.h> 38400e64dfSOhad Ben-Cohen #include <linux/iommu.h> 39b5ab5e24SOhad Ben-Cohen #include <linux/idr.h> 40400e64dfSOhad Ben-Cohen #include <linux/elf.h> 41a2b950acSOhad Ben-Cohen #include <linux/crc32.h> 42400e64dfSOhad Ben-Cohen #include <linux/virtio_ids.h> 43400e64dfSOhad Ben-Cohen #include <linux/virtio_ring.h> 44cf59d3e9SOhad Ben-Cohen #include <asm/byteorder.h> 45400e64dfSOhad Ben-Cohen 46400e64dfSOhad Ben-Cohen #include "remoteproc_internal.h" 47400e64dfSOhad Ben-Cohen 48fec47d86SDave Gerlach static DEFINE_MUTEX(rproc_list_mutex); 49fec47d86SDave Gerlach static LIST_HEAD(rproc_list); 50fec47d86SDave Gerlach 51400e64dfSOhad Ben-Cohen typedef int (*rproc_handle_resources_t)(struct rproc *rproc, 52fd2c15ecSOhad Ben-Cohen struct resource_table *table, int len); 53a2b950acSOhad Ben-Cohen typedef int (*rproc_handle_resource_t)(struct rproc *rproc, 54a2b950acSOhad Ben-Cohen void *, int offset, int avail); 55400e64dfSOhad Ben-Cohen 56b5ab5e24SOhad Ben-Cohen /* Unique indices for remoteproc devices */ 57b5ab5e24SOhad Ben-Cohen static DEFINE_IDA(rproc_dev_index); 58b5ab5e24SOhad Ben-Cohen 598afd519cSFernando Guzman Lugo static const char * const rproc_crash_names[] = { 608afd519cSFernando Guzman Lugo [RPROC_MMUFAULT] = "mmufault", 61b3d39032SBjorn Andersson [RPROC_WATCHDOG] = "watchdog", 62b3d39032SBjorn Andersson [RPROC_FATAL_ERROR] = "fatal error", 638afd519cSFernando Guzman Lugo }; 648afd519cSFernando Guzman Lugo 658afd519cSFernando Guzman Lugo /* translate rproc_crash_type to string */ 668afd519cSFernando Guzman Lugo static const char *rproc_crash_to_string(enum rproc_crash_type type) 678afd519cSFernando Guzman Lugo { 688afd519cSFernando Guzman Lugo if (type < ARRAY_SIZE(rproc_crash_names)) 698afd519cSFernando Guzman Lugo return rproc_crash_names[type]; 70b23f7a09SMasanari Iida return "unknown"; 718afd519cSFernando Guzman Lugo } 728afd519cSFernando Guzman Lugo 73400e64dfSOhad Ben-Cohen /* 74400e64dfSOhad Ben-Cohen * This is the IOMMU fault handler we register with the IOMMU API 75400e64dfSOhad Ben-Cohen * (when relevant; not all remote processors access memory through 76400e64dfSOhad Ben-Cohen * an IOMMU). 77400e64dfSOhad Ben-Cohen * 78400e64dfSOhad Ben-Cohen * IOMMU core will invoke this handler whenever the remote processor 79400e64dfSOhad Ben-Cohen * will try to access an unmapped device address. 80400e64dfSOhad Ben-Cohen */ 81400e64dfSOhad Ben-Cohen static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev, 8277ca2332SOhad Ben-Cohen unsigned long iova, int flags, void *token) 83400e64dfSOhad Ben-Cohen { 848afd519cSFernando Guzman Lugo struct rproc *rproc = token; 858afd519cSFernando Guzman Lugo 86400e64dfSOhad Ben-Cohen dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags); 87400e64dfSOhad Ben-Cohen 888afd519cSFernando Guzman Lugo rproc_report_crash(rproc, RPROC_MMUFAULT); 898afd519cSFernando Guzman Lugo 90400e64dfSOhad Ben-Cohen /* 91400e64dfSOhad Ben-Cohen * Let the iommu core know we're not really handling this fault; 928afd519cSFernando Guzman Lugo * we just used it as a recovery trigger. 93400e64dfSOhad Ben-Cohen */ 94400e64dfSOhad Ben-Cohen return -ENOSYS; 95400e64dfSOhad Ben-Cohen } 96400e64dfSOhad Ben-Cohen 97400e64dfSOhad Ben-Cohen static int rproc_enable_iommu(struct rproc *rproc) 98400e64dfSOhad Ben-Cohen { 99400e64dfSOhad Ben-Cohen struct iommu_domain *domain; 100b5ab5e24SOhad Ben-Cohen struct device *dev = rproc->dev.parent; 101400e64dfSOhad Ben-Cohen int ret; 102400e64dfSOhad Ben-Cohen 103315491e5SSuman Anna if (!rproc->has_iommu) { 104315491e5SSuman Anna dev_dbg(dev, "iommu not present\n"); 1050798e1daSMark Grosen return 0; 106400e64dfSOhad Ben-Cohen } 107400e64dfSOhad Ben-Cohen 108400e64dfSOhad Ben-Cohen domain = iommu_domain_alloc(dev->bus); 109400e64dfSOhad Ben-Cohen if (!domain) { 110400e64dfSOhad Ben-Cohen dev_err(dev, "can't alloc iommu domain\n"); 111400e64dfSOhad Ben-Cohen return -ENOMEM; 112400e64dfSOhad Ben-Cohen } 113400e64dfSOhad Ben-Cohen 11477ca2332SOhad Ben-Cohen iommu_set_fault_handler(domain, rproc_iommu_fault, rproc); 115400e64dfSOhad Ben-Cohen 116400e64dfSOhad Ben-Cohen ret = iommu_attach_device(domain, dev); 117400e64dfSOhad Ben-Cohen if (ret) { 118400e64dfSOhad Ben-Cohen dev_err(dev, "can't attach iommu device: %d\n", ret); 119400e64dfSOhad Ben-Cohen goto free_domain; 120400e64dfSOhad Ben-Cohen } 121400e64dfSOhad Ben-Cohen 122400e64dfSOhad Ben-Cohen rproc->domain = domain; 123400e64dfSOhad Ben-Cohen 124400e64dfSOhad Ben-Cohen return 0; 125400e64dfSOhad Ben-Cohen 126400e64dfSOhad Ben-Cohen free_domain: 127400e64dfSOhad Ben-Cohen iommu_domain_free(domain); 128400e64dfSOhad Ben-Cohen return ret; 129400e64dfSOhad Ben-Cohen } 130400e64dfSOhad Ben-Cohen 131400e64dfSOhad Ben-Cohen static void rproc_disable_iommu(struct rproc *rproc) 132400e64dfSOhad Ben-Cohen { 133400e64dfSOhad Ben-Cohen struct iommu_domain *domain = rproc->domain; 134b5ab5e24SOhad Ben-Cohen struct device *dev = rproc->dev.parent; 135400e64dfSOhad Ben-Cohen 136400e64dfSOhad Ben-Cohen if (!domain) 137400e64dfSOhad Ben-Cohen return; 138400e64dfSOhad Ben-Cohen 139400e64dfSOhad Ben-Cohen iommu_detach_device(domain, dev); 140400e64dfSOhad Ben-Cohen iommu_domain_free(domain); 141400e64dfSOhad Ben-Cohen } 142400e64dfSOhad Ben-Cohen 143a01f7cd6SSuman Anna /** 144a01f7cd6SSuman Anna * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address 145a01f7cd6SSuman Anna * @rproc: handle of a remote processor 146a01f7cd6SSuman Anna * @da: remoteproc device address to translate 147a01f7cd6SSuman Anna * @len: length of the memory region @da is pointing to 148a01f7cd6SSuman Anna * 149400e64dfSOhad Ben-Cohen * Some remote processors will ask us to allocate them physically contiguous 150400e64dfSOhad Ben-Cohen * memory regions (which we call "carveouts"), and map them to specific 151a01f7cd6SSuman Anna * device addresses (which are hardcoded in the firmware). They may also have 152a01f7cd6SSuman Anna * dedicated memory regions internal to the processors, and use them either 153a01f7cd6SSuman Anna * exclusively or alongside carveouts. 154400e64dfSOhad Ben-Cohen * 155400e64dfSOhad Ben-Cohen * They may then ask us to copy objects into specific device addresses (e.g. 156400e64dfSOhad Ben-Cohen * code/data sections) or expose us certain symbols in other device address 157400e64dfSOhad Ben-Cohen * (e.g. their trace buffer). 158400e64dfSOhad Ben-Cohen * 159a01f7cd6SSuman Anna * This function is a helper function with which we can go over the allocated 160a01f7cd6SSuman Anna * carveouts and translate specific device addresses to kernel virtual addresses 161a01f7cd6SSuman Anna * so we can access the referenced memory. This function also allows to perform 162a01f7cd6SSuman Anna * translations on the internal remoteproc memory regions through a platform 163a01f7cd6SSuman Anna * implementation specific da_to_va ops, if present. 164a01f7cd6SSuman Anna * 165a01f7cd6SSuman Anna * The function returns a valid kernel address on success or NULL on failure. 166400e64dfSOhad Ben-Cohen * 167400e64dfSOhad Ben-Cohen * Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too, 168400e64dfSOhad Ben-Cohen * but only on kernel direct mapped RAM memory. Instead, we're just using 169a01f7cd6SSuman Anna * here the output of the DMA API for the carveouts, which should be more 170a01f7cd6SSuman Anna * correct. 171400e64dfSOhad Ben-Cohen */ 17272854fb0SSjur Brændeland void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) 173400e64dfSOhad Ben-Cohen { 174400e64dfSOhad Ben-Cohen struct rproc_mem_entry *carveout; 175400e64dfSOhad Ben-Cohen void *ptr = NULL; 176400e64dfSOhad Ben-Cohen 177a01f7cd6SSuman Anna if (rproc->ops->da_to_va) { 178a01f7cd6SSuman Anna ptr = rproc->ops->da_to_va(rproc, da, len); 179a01f7cd6SSuman Anna if (ptr) 180a01f7cd6SSuman Anna goto out; 181a01f7cd6SSuman Anna } 182a01f7cd6SSuman Anna 183400e64dfSOhad Ben-Cohen list_for_each_entry(carveout, &rproc->carveouts, node) { 184400e64dfSOhad Ben-Cohen int offset = da - carveout->da; 185400e64dfSOhad Ben-Cohen 186400e64dfSOhad Ben-Cohen /* try next carveout if da is too small */ 187400e64dfSOhad Ben-Cohen if (offset < 0) 188400e64dfSOhad Ben-Cohen continue; 189400e64dfSOhad Ben-Cohen 190400e64dfSOhad Ben-Cohen /* try next carveout if da is too large */ 191400e64dfSOhad Ben-Cohen if (offset + len > carveout->len) 192400e64dfSOhad Ben-Cohen continue; 193400e64dfSOhad Ben-Cohen 194400e64dfSOhad Ben-Cohen ptr = carveout->va + offset; 195400e64dfSOhad Ben-Cohen 196400e64dfSOhad Ben-Cohen break; 197400e64dfSOhad Ben-Cohen } 198400e64dfSOhad Ben-Cohen 199a01f7cd6SSuman Anna out: 200400e64dfSOhad Ben-Cohen return ptr; 201400e64dfSOhad Ben-Cohen } 2024afc89d6SSjur Brændeland EXPORT_SYMBOL(rproc_da_to_va); 203400e64dfSOhad Ben-Cohen 2046db20ea8SOhad Ben-Cohen int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) 205400e64dfSOhad Ben-Cohen { 2067a186941SOhad Ben-Cohen struct rproc *rproc = rvdev->rproc; 207b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 2086db20ea8SOhad Ben-Cohen struct rproc_vring *rvring = &rvdev->vring[i]; 209c0d63157SSjur Brændeland struct fw_rsc_vdev *rsc; 2107a186941SOhad Ben-Cohen dma_addr_t dma; 2117a186941SOhad Ben-Cohen void *va; 2127a186941SOhad Ben-Cohen int ret, size, notifyid; 213400e64dfSOhad Ben-Cohen 2146db20ea8SOhad Ben-Cohen /* actual size of vring (in bytes) */ 2156db20ea8SOhad Ben-Cohen size = PAGE_ALIGN(vring_size(rvring->len, rvring->align)); 2166db20ea8SOhad Ben-Cohen 2176db20ea8SOhad Ben-Cohen /* 2186db20ea8SOhad Ben-Cohen * Allocate non-cacheable memory for the vring. In the future 2196db20ea8SOhad Ben-Cohen * this call will also configure the IOMMU for us 2206db20ea8SOhad Ben-Cohen */ 221b5ab5e24SOhad Ben-Cohen va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL); 2226db20ea8SOhad Ben-Cohen if (!va) { 223b5ab5e24SOhad Ben-Cohen dev_err(dev->parent, "dma_alloc_coherent failed\n"); 2246db20ea8SOhad Ben-Cohen return -EINVAL; 2256db20ea8SOhad Ben-Cohen } 2266db20ea8SOhad Ben-Cohen 2276db20ea8SOhad Ben-Cohen /* 2286db20ea8SOhad Ben-Cohen * Assign an rproc-wide unique index for this vring 2296db20ea8SOhad Ben-Cohen * TODO: assign a notifyid for rvdev updates as well 2306db20ea8SOhad Ben-Cohen * TODO: support predefined notifyids (via resource table) 2316db20ea8SOhad Ben-Cohen */ 23215fc6110STejun Heo ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL); 233b39599b7SSuman Anna if (ret < 0) { 23415fc6110STejun Heo dev_err(dev, "idr_alloc failed: %d\n", ret); 235b5ab5e24SOhad Ben-Cohen dma_free_coherent(dev->parent, size, va, dma); 2366db20ea8SOhad Ben-Cohen return ret; 2376db20ea8SOhad Ben-Cohen } 23815fc6110STejun Heo notifyid = ret; 2396db20ea8SOhad Ben-Cohen 24048f18f89SBjorn Andersson /* Potentially bump max_notifyid */ 24148f18f89SBjorn Andersson if (notifyid > rproc->max_notifyid) 24248f18f89SBjorn Andersson rproc->max_notifyid = notifyid; 24348f18f89SBjorn Andersson 2449d7814a9SAnna, Suman dev_dbg(dev, "vring%d: va %p dma %pad size 0x%x idr %d\n", 245b605ed8bSAnna, Suman i, va, &dma, size, notifyid); 2466db20ea8SOhad Ben-Cohen 2476db20ea8SOhad Ben-Cohen rvring->va = va; 2486db20ea8SOhad Ben-Cohen rvring->dma = dma; 2496db20ea8SOhad Ben-Cohen rvring->notifyid = notifyid; 2506db20ea8SOhad Ben-Cohen 251c0d63157SSjur Brændeland /* 252c0d63157SSjur Brændeland * Let the rproc know the notifyid and da of this vring. 253c0d63157SSjur Brændeland * Not all platforms use dma_alloc_coherent to automatically 254c0d63157SSjur Brændeland * set up the iommu. In this case the device address (da) will 255c0d63157SSjur Brændeland * hold the physical address and not the device address. 256c0d63157SSjur Brændeland */ 257c0d63157SSjur Brændeland rsc = (void *)rproc->table_ptr + rvdev->rsc_offset; 258c0d63157SSjur Brændeland rsc->vring[i].da = dma; 259c0d63157SSjur Brændeland rsc->vring[i].notifyid = notifyid; 2606db20ea8SOhad Ben-Cohen return 0; 2616db20ea8SOhad Ben-Cohen } 2626db20ea8SOhad Ben-Cohen 263400e64dfSOhad Ben-Cohen static int 2646db20ea8SOhad Ben-Cohen rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i) 265400e64dfSOhad Ben-Cohen { 266400e64dfSOhad Ben-Cohen struct rproc *rproc = rvdev->rproc; 267b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 268400e64dfSOhad Ben-Cohen struct fw_rsc_vdev_vring *vring = &rsc->vring[i]; 2696db20ea8SOhad Ben-Cohen struct rproc_vring *rvring = &rvdev->vring[i]; 270400e64dfSOhad Ben-Cohen 2719d7814a9SAnna, Suman dev_dbg(dev, "vdev rsc: vring%d: da 0x%x, qsz %d, align %d\n", 2727a186941SOhad Ben-Cohen i, vring->da, vring->num, vring->align); 2737a186941SOhad Ben-Cohen 27463140e0eSOhad Ben-Cohen /* verify queue size and vring alignment are sane */ 27563140e0eSOhad Ben-Cohen if (!vring->num || !vring->align) { 27663140e0eSOhad Ben-Cohen dev_err(dev, "invalid qsz (%d) or alignment (%d)\n", 27763140e0eSOhad Ben-Cohen vring->num, vring->align); 278400e64dfSOhad Ben-Cohen return -EINVAL; 279400e64dfSOhad Ben-Cohen } 280400e64dfSOhad Ben-Cohen 2816db20ea8SOhad Ben-Cohen rvring->len = vring->num; 2826db20ea8SOhad Ben-Cohen rvring->align = vring->align; 2836db20ea8SOhad Ben-Cohen rvring->rvdev = rvdev; 284400e64dfSOhad Ben-Cohen 285400e64dfSOhad Ben-Cohen return 0; 286400e64dfSOhad Ben-Cohen } 287400e64dfSOhad Ben-Cohen 2886db20ea8SOhad Ben-Cohen void rproc_free_vring(struct rproc_vring *rvring) 2897a186941SOhad Ben-Cohen { 29063140e0eSOhad Ben-Cohen int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align)); 2916db20ea8SOhad Ben-Cohen struct rproc *rproc = rvring->rvdev->rproc; 292c0d63157SSjur Brændeland int idx = rvring->rvdev->vring - rvring; 293c0d63157SSjur Brændeland struct fw_rsc_vdev *rsc; 2947a186941SOhad Ben-Cohen 295b5ab5e24SOhad Ben-Cohen dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma); 2967a186941SOhad Ben-Cohen idr_remove(&rproc->notifyids, rvring->notifyid); 297099a3f33SSjur Brændeland 298c0d63157SSjur Brændeland /* reset resource entry info */ 299c0d63157SSjur Brændeland rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset; 300c0d63157SSjur Brændeland rsc->vring[idx].da = 0; 301c0d63157SSjur Brændeland rsc->vring[idx].notifyid = -1; 3027a186941SOhad Ben-Cohen } 3037a186941SOhad Ben-Cohen 3046f8b0373SAlex Elder static int rproc_vdev_do_start(struct rproc_subdev *subdev) 305f5bcb353SBjorn Andersson { 306f5bcb353SBjorn Andersson struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); 307f5bcb353SBjorn Andersson 308f5bcb353SBjorn Andersson return rproc_add_virtio_dev(rvdev, rvdev->id); 309f5bcb353SBjorn Andersson } 310f5bcb353SBjorn Andersson 3116f8b0373SAlex Elder static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed) 312f5bcb353SBjorn Andersson { 313f5bcb353SBjorn Andersson struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev); 314f5bcb353SBjorn Andersson 315f5bcb353SBjorn Andersson rproc_remove_virtio_dev(rvdev); 316f5bcb353SBjorn Andersson } 317f5bcb353SBjorn Andersson 318400e64dfSOhad Ben-Cohen /** 319fd2c15ecSOhad Ben-Cohen * rproc_handle_vdev() - handle a vdev fw resource 320400e64dfSOhad Ben-Cohen * @rproc: the remote processor 321400e64dfSOhad Ben-Cohen * @rsc: the vring resource descriptor 322fd2c15ecSOhad Ben-Cohen * @avail: size of available data (for sanity checking the image) 323400e64dfSOhad Ben-Cohen * 3247a186941SOhad Ben-Cohen * This resource entry requests the host to statically register a virtio 3257a186941SOhad Ben-Cohen * device (vdev), and setup everything needed to support it. It contains 3267a186941SOhad Ben-Cohen * everything needed to make it possible: the virtio device id, virtio 3277a186941SOhad Ben-Cohen * device features, vrings information, virtio config space, etc... 328400e64dfSOhad Ben-Cohen * 3297a186941SOhad Ben-Cohen * Before registering the vdev, the vrings are allocated from non-cacheable 3307a186941SOhad Ben-Cohen * physically contiguous memory. Currently we only support two vrings per 3317a186941SOhad Ben-Cohen * remote processor (temporary limitation). We might also want to consider 3327a186941SOhad Ben-Cohen * doing the vring allocation only later when ->find_vqs() is invoked, and 3337a186941SOhad Ben-Cohen * then release them upon ->del_vqs(). 334400e64dfSOhad Ben-Cohen * 3357a186941SOhad Ben-Cohen * Note: @da is currently not really handled correctly: we dynamically 3367a186941SOhad Ben-Cohen * allocate it using the DMA API, ignoring requested hard coded addresses, 3377a186941SOhad Ben-Cohen * and we don't take care of any required IOMMU programming. This is all 3387a186941SOhad Ben-Cohen * going to be taken care of when the generic iommu-based DMA API will be 3397a186941SOhad Ben-Cohen * merged. Meanwhile, statically-addressed iommu-based firmware images should 3407a186941SOhad Ben-Cohen * use RSC_DEVMEM resource entries to map their required @da to the physical 3417a186941SOhad Ben-Cohen * address of their base CMA region (ouch, hacky!). 342400e64dfSOhad Ben-Cohen * 343400e64dfSOhad Ben-Cohen * Returns 0 on success, or an appropriate error code otherwise 344400e64dfSOhad Ben-Cohen */ 345fd2c15ecSOhad Ben-Cohen static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc, 346a2b950acSOhad Ben-Cohen int offset, int avail) 347400e64dfSOhad Ben-Cohen { 348b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 3497a186941SOhad Ben-Cohen struct rproc_vdev *rvdev; 3507a186941SOhad Ben-Cohen int i, ret; 351fd2c15ecSOhad Ben-Cohen 352fd2c15ecSOhad Ben-Cohen /* make sure resource isn't truncated */ 353fd2c15ecSOhad Ben-Cohen if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring) 354fd2c15ecSOhad Ben-Cohen + rsc->config_len > avail) { 355b5ab5e24SOhad Ben-Cohen dev_err(dev, "vdev rsc is truncated\n"); 356fd2c15ecSOhad Ben-Cohen return -EINVAL; 357fd2c15ecSOhad Ben-Cohen } 358fd2c15ecSOhad Ben-Cohen 359fd2c15ecSOhad Ben-Cohen /* make sure reserved bytes are zeroes */ 360fd2c15ecSOhad Ben-Cohen if (rsc->reserved[0] || rsc->reserved[1]) { 361fd2c15ecSOhad Ben-Cohen dev_err(dev, "vdev rsc has non zero reserved bytes\n"); 362fd2c15ecSOhad Ben-Cohen return -EINVAL; 363fd2c15ecSOhad Ben-Cohen } 364fd2c15ecSOhad Ben-Cohen 3659d7814a9SAnna, Suman dev_dbg(dev, "vdev rsc: id %d, dfeatures 0x%x, cfg len %d, %d vrings\n", 366fd2c15ecSOhad Ben-Cohen rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings); 367400e64dfSOhad Ben-Cohen 3687a186941SOhad Ben-Cohen /* we currently support only two vrings per rvdev */ 3697a186941SOhad Ben-Cohen if (rsc->num_of_vrings > ARRAY_SIZE(rvdev->vring)) { 370fd2c15ecSOhad Ben-Cohen dev_err(dev, "too many vrings: %d\n", rsc->num_of_vrings); 371400e64dfSOhad Ben-Cohen return -EINVAL; 372400e64dfSOhad Ben-Cohen } 373400e64dfSOhad Ben-Cohen 374899585adSAnna, Suman rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL); 3757a186941SOhad Ben-Cohen if (!rvdev) 3767a186941SOhad Ben-Cohen return -ENOMEM; 3777a186941SOhad Ben-Cohen 378aab8d802SBjorn Andersson kref_init(&rvdev->refcount); 379aab8d802SBjorn Andersson 380f5bcb353SBjorn Andersson rvdev->id = rsc->id; 3817a186941SOhad Ben-Cohen rvdev->rproc = rproc; 3827a186941SOhad Ben-Cohen 3836db20ea8SOhad Ben-Cohen /* parse the vrings */ 384fd2c15ecSOhad Ben-Cohen for (i = 0; i < rsc->num_of_vrings; i++) { 3856db20ea8SOhad Ben-Cohen ret = rproc_parse_vring(rvdev, rsc, i); 3867a186941SOhad Ben-Cohen if (ret) 3876db20ea8SOhad Ben-Cohen goto free_rvdev; 388fd2c15ecSOhad Ben-Cohen } 389fd2c15ecSOhad Ben-Cohen 390a2b950acSOhad Ben-Cohen /* remember the resource offset*/ 391a2b950acSOhad Ben-Cohen rvdev->rsc_offset = offset; 392400e64dfSOhad Ben-Cohen 393a863af5dSBjorn Andersson /* allocate the vring resources */ 394a863af5dSBjorn Andersson for (i = 0; i < rsc->num_of_vrings; i++) { 395a863af5dSBjorn Andersson ret = rproc_alloc_vring(rvdev, i); 396a863af5dSBjorn Andersson if (ret) 397a863af5dSBjorn Andersson goto unwind_vring_allocations; 398a863af5dSBjorn Andersson } 399a863af5dSBjorn Andersson 4007a186941SOhad Ben-Cohen list_add_tail(&rvdev->node, &rproc->rvdevs); 401400e64dfSOhad Ben-Cohen 4026f8b0373SAlex Elder rvdev->subdev.start = rproc_vdev_do_start; 4036f8b0373SAlex Elder rvdev->subdev.stop = rproc_vdev_do_stop; 4044902676fSBjorn Andersson 4054902676fSBjorn Andersson rproc_add_subdev(rproc, &rvdev->subdev); 406400e64dfSOhad Ben-Cohen 407400e64dfSOhad Ben-Cohen return 0; 4087a186941SOhad Ben-Cohen 409a863af5dSBjorn Andersson unwind_vring_allocations: 410a863af5dSBjorn Andersson for (i--; i >= 0; i--) 411a863af5dSBjorn Andersson rproc_free_vring(&rvdev->vring[i]); 4126db20ea8SOhad Ben-Cohen free_rvdev: 4137a186941SOhad Ben-Cohen kfree(rvdev); 4147a186941SOhad Ben-Cohen return ret; 415400e64dfSOhad Ben-Cohen } 416400e64dfSOhad Ben-Cohen 417aab8d802SBjorn Andersson void rproc_vdev_release(struct kref *ref) 418aab8d802SBjorn Andersson { 419aab8d802SBjorn Andersson struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount); 420a863af5dSBjorn Andersson struct rproc_vring *rvring; 421f5bcb353SBjorn Andersson struct rproc *rproc = rvdev->rproc; 422a863af5dSBjorn Andersson int id; 423a863af5dSBjorn Andersson 424a863af5dSBjorn Andersson for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) { 425a863af5dSBjorn Andersson rvring = &rvdev->vring[id]; 426a863af5dSBjorn Andersson if (!rvring->va) 427a863af5dSBjorn Andersson continue; 428a863af5dSBjorn Andersson 429a863af5dSBjorn Andersson rproc_free_vring(rvring); 430a863af5dSBjorn Andersson } 431aab8d802SBjorn Andersson 432f5bcb353SBjorn Andersson rproc_remove_subdev(rproc, &rvdev->subdev); 433aab8d802SBjorn Andersson list_del(&rvdev->node); 434aab8d802SBjorn Andersson kfree(rvdev); 435aab8d802SBjorn Andersson } 436aab8d802SBjorn Andersson 437400e64dfSOhad Ben-Cohen /** 438400e64dfSOhad Ben-Cohen * rproc_handle_trace() - handle a shared trace buffer resource 439400e64dfSOhad Ben-Cohen * @rproc: the remote processor 440400e64dfSOhad Ben-Cohen * @rsc: the trace resource descriptor 441fd2c15ecSOhad Ben-Cohen * @avail: size of available data (for sanity checking the image) 442400e64dfSOhad Ben-Cohen * 443400e64dfSOhad Ben-Cohen * In case the remote processor dumps trace logs into memory, 444400e64dfSOhad Ben-Cohen * export it via debugfs. 445400e64dfSOhad Ben-Cohen * 446400e64dfSOhad Ben-Cohen * Currently, the 'da' member of @rsc should contain the device address 447400e64dfSOhad Ben-Cohen * where the remote processor is dumping the traces. Later we could also 448400e64dfSOhad Ben-Cohen * support dynamically allocating this address using the generic 449400e64dfSOhad Ben-Cohen * DMA API (but currently there isn't a use case for that). 450400e64dfSOhad Ben-Cohen * 451400e64dfSOhad Ben-Cohen * Returns 0 on success, or an appropriate error code otherwise 452400e64dfSOhad Ben-Cohen */ 453fd2c15ecSOhad Ben-Cohen static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, 454a2b950acSOhad Ben-Cohen int offset, int avail) 455400e64dfSOhad Ben-Cohen { 456400e64dfSOhad Ben-Cohen struct rproc_mem_entry *trace; 457b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 458400e64dfSOhad Ben-Cohen void *ptr; 459400e64dfSOhad Ben-Cohen char name[15]; 460400e64dfSOhad Ben-Cohen 461fd2c15ecSOhad Ben-Cohen if (sizeof(*rsc) > avail) { 462b5ab5e24SOhad Ben-Cohen dev_err(dev, "trace rsc is truncated\n"); 463fd2c15ecSOhad Ben-Cohen return -EINVAL; 464fd2c15ecSOhad Ben-Cohen } 465fd2c15ecSOhad Ben-Cohen 466fd2c15ecSOhad Ben-Cohen /* make sure reserved bytes are zeroes */ 467fd2c15ecSOhad Ben-Cohen if (rsc->reserved) { 468fd2c15ecSOhad Ben-Cohen dev_err(dev, "trace rsc has non zero reserved bytes\n"); 469fd2c15ecSOhad Ben-Cohen return -EINVAL; 470fd2c15ecSOhad Ben-Cohen } 471fd2c15ecSOhad Ben-Cohen 472400e64dfSOhad Ben-Cohen /* what's the kernel address of this resource ? */ 473400e64dfSOhad Ben-Cohen ptr = rproc_da_to_va(rproc, rsc->da, rsc->len); 474400e64dfSOhad Ben-Cohen if (!ptr) { 475400e64dfSOhad Ben-Cohen dev_err(dev, "erroneous trace resource entry\n"); 476400e64dfSOhad Ben-Cohen return -EINVAL; 477400e64dfSOhad Ben-Cohen } 478400e64dfSOhad Ben-Cohen 479400e64dfSOhad Ben-Cohen trace = kzalloc(sizeof(*trace), GFP_KERNEL); 480172e6ab1SSuman Anna if (!trace) 481400e64dfSOhad Ben-Cohen return -ENOMEM; 482400e64dfSOhad Ben-Cohen 483400e64dfSOhad Ben-Cohen /* set the trace buffer dma properties */ 484400e64dfSOhad Ben-Cohen trace->len = rsc->len; 485400e64dfSOhad Ben-Cohen trace->va = ptr; 486400e64dfSOhad Ben-Cohen 487400e64dfSOhad Ben-Cohen /* make sure snprintf always null terminates, even if truncating */ 488400e64dfSOhad Ben-Cohen snprintf(name, sizeof(name), "trace%d", rproc->num_traces); 489400e64dfSOhad Ben-Cohen 490400e64dfSOhad Ben-Cohen /* create the debugfs entry */ 491400e64dfSOhad Ben-Cohen trace->priv = rproc_create_trace_file(name, rproc, trace); 492400e64dfSOhad Ben-Cohen if (!trace->priv) { 493400e64dfSOhad Ben-Cohen trace->va = NULL; 494400e64dfSOhad Ben-Cohen kfree(trace); 495400e64dfSOhad Ben-Cohen return -EINVAL; 496400e64dfSOhad Ben-Cohen } 497400e64dfSOhad Ben-Cohen 498400e64dfSOhad Ben-Cohen list_add_tail(&trace->node, &rproc->traces); 499400e64dfSOhad Ben-Cohen 500400e64dfSOhad Ben-Cohen rproc->num_traces++; 501400e64dfSOhad Ben-Cohen 50235386166SLee Jones dev_dbg(dev, "%s added: va %p, da 0x%x, len 0x%x\n", 50335386166SLee Jones name, ptr, rsc->da, rsc->len); 504400e64dfSOhad Ben-Cohen 505400e64dfSOhad Ben-Cohen return 0; 506400e64dfSOhad Ben-Cohen } 507400e64dfSOhad Ben-Cohen 508400e64dfSOhad Ben-Cohen /** 509400e64dfSOhad Ben-Cohen * rproc_handle_devmem() - handle devmem resource entry 510400e64dfSOhad Ben-Cohen * @rproc: remote processor handle 511400e64dfSOhad Ben-Cohen * @rsc: the devmem resource entry 512fd2c15ecSOhad Ben-Cohen * @avail: size of available data (for sanity checking the image) 513400e64dfSOhad Ben-Cohen * 514400e64dfSOhad Ben-Cohen * Remote processors commonly need to access certain on-chip peripherals. 515400e64dfSOhad Ben-Cohen * 516400e64dfSOhad Ben-Cohen * Some of these remote processors access memory via an iommu device, 517400e64dfSOhad Ben-Cohen * and might require us to configure their iommu before they can access 518400e64dfSOhad Ben-Cohen * the on-chip peripherals they need. 519400e64dfSOhad Ben-Cohen * 520400e64dfSOhad Ben-Cohen * This resource entry is a request to map such a peripheral device. 521400e64dfSOhad Ben-Cohen * 522400e64dfSOhad Ben-Cohen * These devmem entries will contain the physical address of the device in 523400e64dfSOhad Ben-Cohen * the 'pa' member. If a specific device address is expected, then 'da' will 524400e64dfSOhad Ben-Cohen * contain it (currently this is the only use case supported). 'len' will 525400e64dfSOhad Ben-Cohen * contain the size of the physical region we need to map. 526400e64dfSOhad Ben-Cohen * 527400e64dfSOhad Ben-Cohen * Currently we just "trust" those devmem entries to contain valid physical 528400e64dfSOhad Ben-Cohen * addresses, but this is going to change: we want the implementations to 529400e64dfSOhad Ben-Cohen * tell us ranges of physical addresses the firmware is allowed to request, 530400e64dfSOhad Ben-Cohen * and not allow firmwares to request access to physical addresses that 531400e64dfSOhad Ben-Cohen * are outside those ranges. 532400e64dfSOhad Ben-Cohen */ 533fd2c15ecSOhad Ben-Cohen static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc, 534a2b950acSOhad Ben-Cohen int offset, int avail) 535400e64dfSOhad Ben-Cohen { 536400e64dfSOhad Ben-Cohen struct rproc_mem_entry *mapping; 537b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 538400e64dfSOhad Ben-Cohen int ret; 539400e64dfSOhad Ben-Cohen 540400e64dfSOhad Ben-Cohen /* no point in handling this resource without a valid iommu domain */ 541400e64dfSOhad Ben-Cohen if (!rproc->domain) 542400e64dfSOhad Ben-Cohen return -EINVAL; 543400e64dfSOhad Ben-Cohen 544fd2c15ecSOhad Ben-Cohen if (sizeof(*rsc) > avail) { 545b5ab5e24SOhad Ben-Cohen dev_err(dev, "devmem rsc is truncated\n"); 546fd2c15ecSOhad Ben-Cohen return -EINVAL; 547fd2c15ecSOhad Ben-Cohen } 548fd2c15ecSOhad Ben-Cohen 549fd2c15ecSOhad Ben-Cohen /* make sure reserved bytes are zeroes */ 550fd2c15ecSOhad Ben-Cohen if (rsc->reserved) { 551b5ab5e24SOhad Ben-Cohen dev_err(dev, "devmem rsc has non zero reserved bytes\n"); 552fd2c15ecSOhad Ben-Cohen return -EINVAL; 553fd2c15ecSOhad Ben-Cohen } 554fd2c15ecSOhad Ben-Cohen 555400e64dfSOhad Ben-Cohen mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 556172e6ab1SSuman Anna if (!mapping) 557400e64dfSOhad Ben-Cohen return -ENOMEM; 558400e64dfSOhad Ben-Cohen 559400e64dfSOhad Ben-Cohen ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags); 560400e64dfSOhad Ben-Cohen if (ret) { 561b5ab5e24SOhad Ben-Cohen dev_err(dev, "failed to map devmem: %d\n", ret); 562400e64dfSOhad Ben-Cohen goto out; 563400e64dfSOhad Ben-Cohen } 564400e64dfSOhad Ben-Cohen 565400e64dfSOhad Ben-Cohen /* 566400e64dfSOhad Ben-Cohen * We'll need this info later when we'll want to unmap everything 567400e64dfSOhad Ben-Cohen * (e.g. on shutdown). 568400e64dfSOhad Ben-Cohen * 569400e64dfSOhad Ben-Cohen * We can't trust the remote processor not to change the resource 570400e64dfSOhad Ben-Cohen * table, so we must maintain this info independently. 571400e64dfSOhad Ben-Cohen */ 572400e64dfSOhad Ben-Cohen mapping->da = rsc->da; 573400e64dfSOhad Ben-Cohen mapping->len = rsc->len; 574400e64dfSOhad Ben-Cohen list_add_tail(&mapping->node, &rproc->mappings); 575400e64dfSOhad Ben-Cohen 576b5ab5e24SOhad Ben-Cohen dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n", 577400e64dfSOhad Ben-Cohen rsc->pa, rsc->da, rsc->len); 578400e64dfSOhad Ben-Cohen 579400e64dfSOhad Ben-Cohen return 0; 580400e64dfSOhad Ben-Cohen 581400e64dfSOhad Ben-Cohen out: 582400e64dfSOhad Ben-Cohen kfree(mapping); 583400e64dfSOhad Ben-Cohen return ret; 584400e64dfSOhad Ben-Cohen } 585400e64dfSOhad Ben-Cohen 586400e64dfSOhad Ben-Cohen /** 587400e64dfSOhad Ben-Cohen * rproc_handle_carveout() - handle phys contig memory allocation requests 588400e64dfSOhad Ben-Cohen * @rproc: rproc handle 589400e64dfSOhad Ben-Cohen * @rsc: the resource entry 590fd2c15ecSOhad Ben-Cohen * @avail: size of available data (for image validation) 591400e64dfSOhad Ben-Cohen * 592400e64dfSOhad Ben-Cohen * This function will handle firmware requests for allocation of physically 593400e64dfSOhad Ben-Cohen * contiguous memory regions. 594400e64dfSOhad Ben-Cohen * 595400e64dfSOhad Ben-Cohen * These request entries should come first in the firmware's resource table, 596400e64dfSOhad Ben-Cohen * as other firmware entries might request placing other data objects inside 597400e64dfSOhad Ben-Cohen * these memory regions (e.g. data/code segments, trace resource entries, ...). 598400e64dfSOhad Ben-Cohen * 599400e64dfSOhad Ben-Cohen * Allocating memory this way helps utilizing the reserved physical memory 600400e64dfSOhad Ben-Cohen * (e.g. CMA) more efficiently, and also minimizes the number of TLB entries 601400e64dfSOhad Ben-Cohen * needed to map it (in case @rproc is using an IOMMU). Reducing the TLB 602400e64dfSOhad Ben-Cohen * pressure is important; it may have a substantial impact on performance. 603400e64dfSOhad Ben-Cohen */ 604fd2c15ecSOhad Ben-Cohen static int rproc_handle_carveout(struct rproc *rproc, 605a2b950acSOhad Ben-Cohen struct fw_rsc_carveout *rsc, 606a2b950acSOhad Ben-Cohen int offset, int avail) 607400e64dfSOhad Ben-Cohen { 608400e64dfSOhad Ben-Cohen struct rproc_mem_entry *carveout, *mapping; 609b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 610400e64dfSOhad Ben-Cohen dma_addr_t dma; 611400e64dfSOhad Ben-Cohen void *va; 612400e64dfSOhad Ben-Cohen int ret; 613400e64dfSOhad Ben-Cohen 614fd2c15ecSOhad Ben-Cohen if (sizeof(*rsc) > avail) { 615b5ab5e24SOhad Ben-Cohen dev_err(dev, "carveout rsc is truncated\n"); 616fd2c15ecSOhad Ben-Cohen return -EINVAL; 617fd2c15ecSOhad Ben-Cohen } 618fd2c15ecSOhad Ben-Cohen 619fd2c15ecSOhad Ben-Cohen /* make sure reserved bytes are zeroes */ 620fd2c15ecSOhad Ben-Cohen if (rsc->reserved) { 621fd2c15ecSOhad Ben-Cohen dev_err(dev, "carveout rsc has non zero reserved bytes\n"); 622fd2c15ecSOhad Ben-Cohen return -EINVAL; 623fd2c15ecSOhad Ben-Cohen } 624fd2c15ecSOhad Ben-Cohen 6259d7814a9SAnna, Suman dev_dbg(dev, "carveout rsc: name: %s, da 0x%x, pa 0x%x, len 0x%x, flags 0x%x\n", 62635386166SLee Jones rsc->name, rsc->da, rsc->pa, rsc->len, rsc->flags); 627fd2c15ecSOhad Ben-Cohen 628400e64dfSOhad Ben-Cohen carveout = kzalloc(sizeof(*carveout), GFP_KERNEL); 629172e6ab1SSuman Anna if (!carveout) 6307168d914SDan Carpenter return -ENOMEM; 631400e64dfSOhad Ben-Cohen 632b5ab5e24SOhad Ben-Cohen va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL); 633400e64dfSOhad Ben-Cohen if (!va) { 6349c219b23SLee Jones dev_err(dev->parent, 6359c219b23SLee Jones "failed to allocate dma memory: len 0x%x\n", rsc->len); 636400e64dfSOhad Ben-Cohen ret = -ENOMEM; 637400e64dfSOhad Ben-Cohen goto free_carv; 638400e64dfSOhad Ben-Cohen } 639400e64dfSOhad Ben-Cohen 640b605ed8bSAnna, Suman dev_dbg(dev, "carveout va %p, dma %pad, len 0x%x\n", 641b605ed8bSAnna, Suman va, &dma, rsc->len); 642400e64dfSOhad Ben-Cohen 643400e64dfSOhad Ben-Cohen /* 644400e64dfSOhad Ben-Cohen * Ok, this is non-standard. 645400e64dfSOhad Ben-Cohen * 646400e64dfSOhad Ben-Cohen * Sometimes we can't rely on the generic iommu-based DMA API 647400e64dfSOhad Ben-Cohen * to dynamically allocate the device address and then set the IOMMU 648400e64dfSOhad Ben-Cohen * tables accordingly, because some remote processors might 649400e64dfSOhad Ben-Cohen * _require_ us to use hard coded device addresses that their 650400e64dfSOhad Ben-Cohen * firmware was compiled with. 651400e64dfSOhad Ben-Cohen * 652400e64dfSOhad Ben-Cohen * In this case, we must use the IOMMU API directly and map 653400e64dfSOhad Ben-Cohen * the memory to the device address as expected by the remote 654400e64dfSOhad Ben-Cohen * processor. 655400e64dfSOhad Ben-Cohen * 656400e64dfSOhad Ben-Cohen * Obviously such remote processor devices should not be configured 657400e64dfSOhad Ben-Cohen * to use the iommu-based DMA API: we expect 'dma' to contain the 658400e64dfSOhad Ben-Cohen * physical address in this case. 659400e64dfSOhad Ben-Cohen */ 660400e64dfSOhad Ben-Cohen if (rproc->domain) { 6617168d914SDan Carpenter mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 6627168d914SDan Carpenter if (!mapping) { 6637168d914SDan Carpenter ret = -ENOMEM; 6647168d914SDan Carpenter goto dma_free; 6657168d914SDan Carpenter } 6667168d914SDan Carpenter 667400e64dfSOhad Ben-Cohen ret = iommu_map(rproc->domain, rsc->da, dma, rsc->len, 668400e64dfSOhad Ben-Cohen rsc->flags); 669400e64dfSOhad Ben-Cohen if (ret) { 670400e64dfSOhad Ben-Cohen dev_err(dev, "iommu_map failed: %d\n", ret); 6717168d914SDan Carpenter goto free_mapping; 672400e64dfSOhad Ben-Cohen } 673400e64dfSOhad Ben-Cohen 674400e64dfSOhad Ben-Cohen /* 675400e64dfSOhad Ben-Cohen * We'll need this info later when we'll want to unmap 676400e64dfSOhad Ben-Cohen * everything (e.g. on shutdown). 677400e64dfSOhad Ben-Cohen * 678400e64dfSOhad Ben-Cohen * We can't trust the remote processor not to change the 679400e64dfSOhad Ben-Cohen * resource table, so we must maintain this info independently. 680400e64dfSOhad Ben-Cohen */ 681400e64dfSOhad Ben-Cohen mapping->da = rsc->da; 682400e64dfSOhad Ben-Cohen mapping->len = rsc->len; 683400e64dfSOhad Ben-Cohen list_add_tail(&mapping->node, &rproc->mappings); 684400e64dfSOhad Ben-Cohen 685b605ed8bSAnna, Suman dev_dbg(dev, "carveout mapped 0x%x to %pad\n", 686b605ed8bSAnna, Suman rsc->da, &dma); 6870e49b72cSOhad Ben-Cohen } 688400e64dfSOhad Ben-Cohen 689400e64dfSOhad Ben-Cohen /* 690400e64dfSOhad Ben-Cohen * Some remote processors might need to know the pa 691400e64dfSOhad Ben-Cohen * even though they are behind an IOMMU. E.g., OMAP4's 692400e64dfSOhad Ben-Cohen * remote M3 processor needs this so it can control 693400e64dfSOhad Ben-Cohen * on-chip hardware accelerators that are not behind 694400e64dfSOhad Ben-Cohen * the IOMMU, and therefor must know the pa. 695400e64dfSOhad Ben-Cohen * 696400e64dfSOhad Ben-Cohen * Generally we don't want to expose physical addresses 697400e64dfSOhad Ben-Cohen * if we don't have to (remote processors are generally 698400e64dfSOhad Ben-Cohen * _not_ trusted), so we might want to do this only for 699400e64dfSOhad Ben-Cohen * remote processor that _must_ have this (e.g. OMAP4's 700400e64dfSOhad Ben-Cohen * dual M3 subsystem). 7010e49b72cSOhad Ben-Cohen * 7020e49b72cSOhad Ben-Cohen * Non-IOMMU processors might also want to have this info. 7030e49b72cSOhad Ben-Cohen * In this case, the device address and the physical address 7040e49b72cSOhad Ben-Cohen * are the same. 705400e64dfSOhad Ben-Cohen */ 706400e64dfSOhad Ben-Cohen rsc->pa = dma; 707400e64dfSOhad Ben-Cohen 708400e64dfSOhad Ben-Cohen carveout->va = va; 709400e64dfSOhad Ben-Cohen carveout->len = rsc->len; 710400e64dfSOhad Ben-Cohen carveout->dma = dma; 711400e64dfSOhad Ben-Cohen carveout->da = rsc->da; 712400e64dfSOhad Ben-Cohen 713400e64dfSOhad Ben-Cohen list_add_tail(&carveout->node, &rproc->carveouts); 714400e64dfSOhad Ben-Cohen 715400e64dfSOhad Ben-Cohen return 0; 716400e64dfSOhad Ben-Cohen 7177168d914SDan Carpenter free_mapping: 7187168d914SDan Carpenter kfree(mapping); 719400e64dfSOhad Ben-Cohen dma_free: 720b5ab5e24SOhad Ben-Cohen dma_free_coherent(dev->parent, rsc->len, va, dma); 721400e64dfSOhad Ben-Cohen free_carv: 722400e64dfSOhad Ben-Cohen kfree(carveout); 723400e64dfSOhad Ben-Cohen return ret; 724400e64dfSOhad Ben-Cohen } 725400e64dfSOhad Ben-Cohen 726e12bc14bSOhad Ben-Cohen /* 727e12bc14bSOhad Ben-Cohen * A lookup table for resource handlers. The indices are defined in 728e12bc14bSOhad Ben-Cohen * enum fw_resource_type. 729e12bc14bSOhad Ben-Cohen */ 730232fcdbbSSjur Brændeland static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = { 731fd2c15ecSOhad Ben-Cohen [RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout, 732fd2c15ecSOhad Ben-Cohen [RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem, 733fd2c15ecSOhad Ben-Cohen [RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace, 734232fcdbbSSjur Brændeland [RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev, 735232fcdbbSSjur Brændeland }; 736232fcdbbSSjur Brændeland 737400e64dfSOhad Ben-Cohen /* handle firmware resource entries before booting the remote processor */ 738a4b24c75SBjorn Andersson static int rproc_handle_resources(struct rproc *rproc, 739232fcdbbSSjur Brændeland rproc_handle_resource_t handlers[RSC_LAST]) 740400e64dfSOhad Ben-Cohen { 741b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 742e12bc14bSOhad Ben-Cohen rproc_handle_resource_t handler; 743fd2c15ecSOhad Ben-Cohen int ret = 0, i; 744400e64dfSOhad Ben-Cohen 745d4bb86f2SBjorn Andersson if (!rproc->table_ptr) 746d4bb86f2SBjorn Andersson return 0; 747d4bb86f2SBjorn Andersson 748a2b950acSOhad Ben-Cohen for (i = 0; i < rproc->table_ptr->num; i++) { 749a2b950acSOhad Ben-Cohen int offset = rproc->table_ptr->offset[i]; 750a2b950acSOhad Ben-Cohen struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset; 751a4b24c75SBjorn Andersson int avail = rproc->table_sz - offset - sizeof(*hdr); 752fd2c15ecSOhad Ben-Cohen void *rsc = (void *)hdr + sizeof(*hdr); 753400e64dfSOhad Ben-Cohen 754fd2c15ecSOhad Ben-Cohen /* make sure table isn't truncated */ 755fd2c15ecSOhad Ben-Cohen if (avail < 0) { 756fd2c15ecSOhad Ben-Cohen dev_err(dev, "rsc table is truncated\n"); 757fd2c15ecSOhad Ben-Cohen return -EINVAL; 758fd2c15ecSOhad Ben-Cohen } 759fd2c15ecSOhad Ben-Cohen 760fd2c15ecSOhad Ben-Cohen dev_dbg(dev, "rsc: type %d\n", hdr->type); 761fd2c15ecSOhad Ben-Cohen 762fd2c15ecSOhad Ben-Cohen if (hdr->type >= RSC_LAST) { 763fd2c15ecSOhad Ben-Cohen dev_warn(dev, "unsupported resource %d\n", hdr->type); 764e12bc14bSOhad Ben-Cohen continue; 765400e64dfSOhad Ben-Cohen } 766400e64dfSOhad Ben-Cohen 767232fcdbbSSjur Brændeland handler = handlers[hdr->type]; 768e12bc14bSOhad Ben-Cohen if (!handler) 769e12bc14bSOhad Ben-Cohen continue; 770e12bc14bSOhad Ben-Cohen 771a2b950acSOhad Ben-Cohen ret = handler(rproc, rsc, offset + sizeof(*hdr), avail); 7727a186941SOhad Ben-Cohen if (ret) 773400e64dfSOhad Ben-Cohen break; 774400e64dfSOhad Ben-Cohen } 775400e64dfSOhad Ben-Cohen 776400e64dfSOhad Ben-Cohen return ret; 777400e64dfSOhad Ben-Cohen } 778400e64dfSOhad Ben-Cohen 779618fcff3SBjorn Andersson static int rproc_start_subdevices(struct rproc *rproc) 7807bdc9650SBjorn Andersson { 7817bdc9650SBjorn Andersson struct rproc_subdev *subdev; 7827bdc9650SBjorn Andersson int ret; 7837bdc9650SBjorn Andersson 7847bdc9650SBjorn Andersson list_for_each_entry(subdev, &rproc->subdevs, node) { 785be37b1e0SBjorn Andersson if (subdev->start) { 786618fcff3SBjorn Andersson ret = subdev->start(subdev); 7877bdc9650SBjorn Andersson if (ret) 7887bdc9650SBjorn Andersson goto unroll_registration; 7897bdc9650SBjorn Andersson } 790be37b1e0SBjorn Andersson } 7917bdc9650SBjorn Andersson 7927bdc9650SBjorn Andersson return 0; 7937bdc9650SBjorn Andersson 7947bdc9650SBjorn Andersson unroll_registration: 795be37b1e0SBjorn Andersson list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) { 796be37b1e0SBjorn Andersson if (subdev->stop) 797618fcff3SBjorn Andersson subdev->stop(subdev, true); 798be37b1e0SBjorn Andersson } 7997bdc9650SBjorn Andersson 8007bdc9650SBjorn Andersson return ret; 8017bdc9650SBjorn Andersson } 8027bdc9650SBjorn Andersson 803618fcff3SBjorn Andersson static void rproc_stop_subdevices(struct rproc *rproc, bool crashed) 8047bdc9650SBjorn Andersson { 8057bdc9650SBjorn Andersson struct rproc_subdev *subdev; 8067bdc9650SBjorn Andersson 807be37b1e0SBjorn Andersson list_for_each_entry_reverse(subdev, &rproc->subdevs, node) { 808be37b1e0SBjorn Andersson if (subdev->stop) 809618fcff3SBjorn Andersson subdev->stop(subdev, crashed); 8107bdc9650SBjorn Andersson } 811be37b1e0SBjorn Andersson } 8127bdc9650SBjorn Andersson 813400e64dfSOhad Ben-Cohen /** 8142666ca91SSarangdhar Joshi * rproc_coredump_cleanup() - clean up dump_segments list 8152666ca91SSarangdhar Joshi * @rproc: the remote processor handle 8162666ca91SSarangdhar Joshi */ 8172666ca91SSarangdhar Joshi static void rproc_coredump_cleanup(struct rproc *rproc) 8182666ca91SSarangdhar Joshi { 8192666ca91SSarangdhar Joshi struct rproc_dump_segment *entry, *tmp; 8202666ca91SSarangdhar Joshi 8212666ca91SSarangdhar Joshi list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) { 8222666ca91SSarangdhar Joshi list_del(&entry->node); 8232666ca91SSarangdhar Joshi kfree(entry); 8242666ca91SSarangdhar Joshi } 8252666ca91SSarangdhar Joshi } 8262666ca91SSarangdhar Joshi 8272666ca91SSarangdhar Joshi /** 828400e64dfSOhad Ben-Cohen * rproc_resource_cleanup() - clean up and free all acquired resources 829400e64dfSOhad Ben-Cohen * @rproc: rproc handle 830400e64dfSOhad Ben-Cohen * 831400e64dfSOhad Ben-Cohen * This function will free all resources acquired for @rproc, and it 8327a186941SOhad Ben-Cohen * is called whenever @rproc either shuts down or fails to boot. 833400e64dfSOhad Ben-Cohen */ 834400e64dfSOhad Ben-Cohen static void rproc_resource_cleanup(struct rproc *rproc) 835400e64dfSOhad Ben-Cohen { 836400e64dfSOhad Ben-Cohen struct rproc_mem_entry *entry, *tmp; 837d81fb32fSBjorn Andersson struct rproc_vdev *rvdev, *rvtmp; 838b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 839400e64dfSOhad Ben-Cohen 840400e64dfSOhad Ben-Cohen /* clean up debugfs trace entries */ 841400e64dfSOhad Ben-Cohen list_for_each_entry_safe(entry, tmp, &rproc->traces, node) { 842400e64dfSOhad Ben-Cohen rproc_remove_trace_file(entry->priv); 843400e64dfSOhad Ben-Cohen rproc->num_traces--; 844400e64dfSOhad Ben-Cohen list_del(&entry->node); 845400e64dfSOhad Ben-Cohen kfree(entry); 846400e64dfSOhad Ben-Cohen } 847400e64dfSOhad Ben-Cohen 848400e64dfSOhad Ben-Cohen /* clean up iommu mapping entries */ 849400e64dfSOhad Ben-Cohen list_for_each_entry_safe(entry, tmp, &rproc->mappings, node) { 850400e64dfSOhad Ben-Cohen size_t unmapped; 851400e64dfSOhad Ben-Cohen 852400e64dfSOhad Ben-Cohen unmapped = iommu_unmap(rproc->domain, entry->da, entry->len); 853400e64dfSOhad Ben-Cohen if (unmapped != entry->len) { 854400e64dfSOhad Ben-Cohen /* nothing much to do besides complaining */ 855e981f6d4SSjur Brændeland dev_err(dev, "failed to unmap %u/%zu\n", entry->len, 856400e64dfSOhad Ben-Cohen unmapped); 857400e64dfSOhad Ben-Cohen } 858400e64dfSOhad Ben-Cohen 859400e64dfSOhad Ben-Cohen list_del(&entry->node); 860400e64dfSOhad Ben-Cohen kfree(entry); 861400e64dfSOhad Ben-Cohen } 862b6356a01SSuman Anna 863b6356a01SSuman Anna /* clean up carveout allocations */ 864b6356a01SSuman Anna list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { 865172e6ab1SSuman Anna dma_free_coherent(dev->parent, entry->len, entry->va, 866172e6ab1SSuman Anna entry->dma); 867b6356a01SSuman Anna list_del(&entry->node); 868b6356a01SSuman Anna kfree(entry); 869b6356a01SSuman Anna } 870d81fb32fSBjorn Andersson 871d81fb32fSBjorn Andersson /* clean up remote vdev entries */ 872f5bcb353SBjorn Andersson list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node) 8732b45cef5SBjorn Andersson kref_put(&rvdev->refcount, rproc_vdev_release); 8742666ca91SSarangdhar Joshi 8752666ca91SSarangdhar Joshi rproc_coredump_cleanup(rproc); 8762b45cef5SBjorn Andersson } 877400e64dfSOhad Ben-Cohen 8781efa30d0SSarangdhar Joshi static int rproc_start(struct rproc *rproc, const struct firmware *fw) 8791efa30d0SSarangdhar Joshi { 880a4b24c75SBjorn Andersson struct resource_table *loaded_table; 8811efa30d0SSarangdhar Joshi struct device *dev = &rproc->dev; 882a4b24c75SBjorn Andersson int ret; 8831efa30d0SSarangdhar Joshi 8841efa30d0SSarangdhar Joshi /* load the ELF segments to memory */ 8851efa30d0SSarangdhar Joshi ret = rproc_load_segments(rproc, fw); 8861efa30d0SSarangdhar Joshi if (ret) { 8871efa30d0SSarangdhar Joshi dev_err(dev, "Failed to load program segments: %d\n", ret); 8881efa30d0SSarangdhar Joshi return ret; 8891efa30d0SSarangdhar Joshi } 8901efa30d0SSarangdhar Joshi 8911efa30d0SSarangdhar Joshi /* 8921efa30d0SSarangdhar Joshi * The starting device has been given the rproc->cached_table as the 8931efa30d0SSarangdhar Joshi * resource table. The address of the vring along with the other 8941efa30d0SSarangdhar Joshi * allocated resources (carveouts etc) is stored in cached_table. 8951efa30d0SSarangdhar Joshi * In order to pass this information to the remote device we must copy 8961efa30d0SSarangdhar Joshi * this information to device memory. We also update the table_ptr so 8971efa30d0SSarangdhar Joshi * that any subsequent changes will be applied to the loaded version. 8981efa30d0SSarangdhar Joshi */ 8991efa30d0SSarangdhar Joshi loaded_table = rproc_find_loaded_rsc_table(rproc, fw); 9001efa30d0SSarangdhar Joshi if (loaded_table) { 901a4b24c75SBjorn Andersson memcpy(loaded_table, rproc->cached_table, rproc->table_sz); 9021efa30d0SSarangdhar Joshi rproc->table_ptr = loaded_table; 9031efa30d0SSarangdhar Joshi } 9041efa30d0SSarangdhar Joshi 9051efa30d0SSarangdhar Joshi /* power up the remote processor */ 9061efa30d0SSarangdhar Joshi ret = rproc->ops->start(rproc); 9071efa30d0SSarangdhar Joshi if (ret) { 9081efa30d0SSarangdhar Joshi dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret); 9091efa30d0SSarangdhar Joshi return ret; 9101efa30d0SSarangdhar Joshi } 9111efa30d0SSarangdhar Joshi 912618fcff3SBjorn Andersson /* Start any subdevices for the remote processor */ 913618fcff3SBjorn Andersson ret = rproc_start_subdevices(rproc); 9141efa30d0SSarangdhar Joshi if (ret) { 9151efa30d0SSarangdhar Joshi dev_err(dev, "failed to probe subdevices for %s: %d\n", 9161efa30d0SSarangdhar Joshi rproc->name, ret); 9171efa30d0SSarangdhar Joshi rproc->ops->stop(rproc); 9181efa30d0SSarangdhar Joshi return ret; 9191efa30d0SSarangdhar Joshi } 9201efa30d0SSarangdhar Joshi 9211efa30d0SSarangdhar Joshi rproc->state = RPROC_RUNNING; 9221efa30d0SSarangdhar Joshi 9231efa30d0SSarangdhar Joshi dev_info(dev, "remote processor %s is now up\n", rproc->name); 9241efa30d0SSarangdhar Joshi 9251efa30d0SSarangdhar Joshi return 0; 9261efa30d0SSarangdhar Joshi } 9271efa30d0SSarangdhar Joshi 928400e64dfSOhad Ben-Cohen /* 929400e64dfSOhad Ben-Cohen * take a firmware and boot a remote processor with it. 930400e64dfSOhad Ben-Cohen */ 931400e64dfSOhad Ben-Cohen static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) 932400e64dfSOhad Ben-Cohen { 933b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 934400e64dfSOhad Ben-Cohen const char *name = rproc->firmware; 93558b64090SBjorn Andersson int ret; 936400e64dfSOhad Ben-Cohen 937400e64dfSOhad Ben-Cohen ret = rproc_fw_sanity_check(rproc, fw); 938400e64dfSOhad Ben-Cohen if (ret) 939400e64dfSOhad Ben-Cohen return ret; 940400e64dfSOhad Ben-Cohen 941e981f6d4SSjur Brændeland dev_info(dev, "Booting fw image %s, size %zd\n", name, fw->size); 942400e64dfSOhad Ben-Cohen 943400e64dfSOhad Ben-Cohen /* 944400e64dfSOhad Ben-Cohen * if enabling an IOMMU isn't relevant for this rproc, this is 945400e64dfSOhad Ben-Cohen * just a nop 946400e64dfSOhad Ben-Cohen */ 947400e64dfSOhad Ben-Cohen ret = rproc_enable_iommu(rproc); 948400e64dfSOhad Ben-Cohen if (ret) { 949400e64dfSOhad Ben-Cohen dev_err(dev, "can't enable iommu: %d\n", ret); 950400e64dfSOhad Ben-Cohen return ret; 951400e64dfSOhad Ben-Cohen } 952400e64dfSOhad Ben-Cohen 9533e5f9eb5SSjur Brændeland rproc->bootaddr = rproc_get_boot_addr(rproc, fw); 954400e64dfSOhad Ben-Cohen 955c1d35c1aSBjorn Andersson /* Load resource table, core dump segment list etc from the firmware */ 956c1d35c1aSBjorn Andersson ret = rproc_parse_fw(rproc, fw); 95758b64090SBjorn Andersson if (ret) 95858b64090SBjorn Andersson goto disable_iommu; 959a0c10687SBjorn Andersson 960b35d7afcSBjorn Andersson /* reset max_notifyid */ 961b35d7afcSBjorn Andersson rproc->max_notifyid = -1; 962b35d7afcSBjorn Andersson 963400e64dfSOhad Ben-Cohen /* handle fw resources which are required to boot rproc */ 964a4b24c75SBjorn Andersson ret = rproc_handle_resources(rproc, rproc_loading_handlers); 965400e64dfSOhad Ben-Cohen if (ret) { 966400e64dfSOhad Ben-Cohen dev_err(dev, "Failed to process resources: %d\n", ret); 967229b85a6SBjorn Andersson goto clean_up_resources; 968400e64dfSOhad Ben-Cohen } 969400e64dfSOhad Ben-Cohen 9701efa30d0SSarangdhar Joshi ret = rproc_start(rproc, fw); 9711efa30d0SSarangdhar Joshi if (ret) 972229b85a6SBjorn Andersson goto clean_up_resources; 973400e64dfSOhad Ben-Cohen 974400e64dfSOhad Ben-Cohen return 0; 975400e64dfSOhad Ben-Cohen 976229b85a6SBjorn Andersson clean_up_resources: 977229b85a6SBjorn Andersson rproc_resource_cleanup(rproc); 978a0c10687SBjorn Andersson kfree(rproc->cached_table); 979a0c10687SBjorn Andersson rproc->cached_table = NULL; 980988d204cSBjorn Andersson rproc->table_ptr = NULL; 98158b64090SBjorn Andersson disable_iommu: 982400e64dfSOhad Ben-Cohen rproc_disable_iommu(rproc); 983400e64dfSOhad Ben-Cohen return ret; 984400e64dfSOhad Ben-Cohen } 985400e64dfSOhad Ben-Cohen 986400e64dfSOhad Ben-Cohen /* 9875e6533f7SSarangdhar Joshi * take a firmware and boot it up. 988400e64dfSOhad Ben-Cohen * 989400e64dfSOhad Ben-Cohen * Note: this function is called asynchronously upon registration of the 990400e64dfSOhad Ben-Cohen * remote processor (so we must wait until it completes before we try 991400e64dfSOhad Ben-Cohen * to unregister the device. one other option is just to use kref here, 992400e64dfSOhad Ben-Cohen * that might be cleaner). 993400e64dfSOhad Ben-Cohen */ 9945e6533f7SSarangdhar Joshi static void rproc_auto_boot_callback(const struct firmware *fw, void *context) 995400e64dfSOhad Ben-Cohen { 996400e64dfSOhad Ben-Cohen struct rproc *rproc = context; 997a2b950acSOhad Ben-Cohen 9982bfc311aSBjorn Andersson rproc_boot(rproc); 999ddf71187SBjorn Andersson 1000400e64dfSOhad Ben-Cohen release_firmware(fw); 1001400e64dfSOhad Ben-Cohen } 1002400e64dfSOhad Ben-Cohen 10035e6533f7SSarangdhar Joshi static int rproc_trigger_auto_boot(struct rproc *rproc) 100470b85ef8SFernando Guzman Lugo { 100570b85ef8SFernando Guzman Lugo int ret; 100670b85ef8SFernando Guzman Lugo 100770b85ef8SFernando Guzman Lugo /* 100870b85ef8SFernando Guzman Lugo * We're initiating an asynchronous firmware loading, so we can 100970b85ef8SFernando Guzman Lugo * be built-in kernel code, without hanging the boot process. 101070b85ef8SFernando Guzman Lugo */ 101170b85ef8SFernando Guzman Lugo ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG, 101270b85ef8SFernando Guzman Lugo rproc->firmware, &rproc->dev, GFP_KERNEL, 10135e6533f7SSarangdhar Joshi rproc, rproc_auto_boot_callback); 10142099c77dSSarangdhar Joshi if (ret < 0) 101570b85ef8SFernando Guzman Lugo dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret); 101670b85ef8SFernando Guzman Lugo 101770b85ef8SFernando Guzman Lugo return ret; 101870b85ef8SFernando Guzman Lugo } 101970b85ef8SFernando Guzman Lugo 1020880f5b38SBjorn Andersson static int rproc_stop(struct rproc *rproc, bool crashed) 10211efa30d0SSarangdhar Joshi { 10221efa30d0SSarangdhar Joshi struct device *dev = &rproc->dev; 10231efa30d0SSarangdhar Joshi int ret; 10241efa30d0SSarangdhar Joshi 1025618fcff3SBjorn Andersson /* Stop any subdevices for the remote processor */ 1026618fcff3SBjorn Andersson rproc_stop_subdevices(rproc, crashed); 10271efa30d0SSarangdhar Joshi 10280a8b81cbSBjorn Andersson /* the installed resource table is no longer accessible */ 10290a8b81cbSBjorn Andersson rproc->table_ptr = rproc->cached_table; 10300a8b81cbSBjorn Andersson 10311efa30d0SSarangdhar Joshi /* power off the remote processor */ 10321efa30d0SSarangdhar Joshi ret = rproc->ops->stop(rproc); 10331efa30d0SSarangdhar Joshi if (ret) { 10341efa30d0SSarangdhar Joshi dev_err(dev, "can't stop rproc: %d\n", ret); 10351efa30d0SSarangdhar Joshi return ret; 10361efa30d0SSarangdhar Joshi } 10371efa30d0SSarangdhar Joshi 10381efa30d0SSarangdhar Joshi rproc->state = RPROC_OFFLINE; 10391efa30d0SSarangdhar Joshi 10401efa30d0SSarangdhar Joshi dev_info(dev, "stopped remote processor %s\n", rproc->name); 10411efa30d0SSarangdhar Joshi 10421efa30d0SSarangdhar Joshi return 0; 10431efa30d0SSarangdhar Joshi } 10441efa30d0SSarangdhar Joshi 104570b85ef8SFernando Guzman Lugo /** 10462666ca91SSarangdhar Joshi * rproc_coredump_add_segment() - add segment of device memory to coredump 10472666ca91SSarangdhar Joshi * @rproc: handle of a remote processor 10482666ca91SSarangdhar Joshi * @da: device address 10492666ca91SSarangdhar Joshi * @size: size of segment 10502666ca91SSarangdhar Joshi * 10512666ca91SSarangdhar Joshi * Add device memory to the list of segments to be included in a coredump for 10522666ca91SSarangdhar Joshi * the remoteproc. 10532666ca91SSarangdhar Joshi * 10542666ca91SSarangdhar Joshi * Return: 0 on success, negative errno on error. 10552666ca91SSarangdhar Joshi */ 10562666ca91SSarangdhar Joshi int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size) 10572666ca91SSarangdhar Joshi { 10582666ca91SSarangdhar Joshi struct rproc_dump_segment *segment; 10592666ca91SSarangdhar Joshi 10602666ca91SSarangdhar Joshi segment = kzalloc(sizeof(*segment), GFP_KERNEL); 10612666ca91SSarangdhar Joshi if (!segment) 10622666ca91SSarangdhar Joshi return -ENOMEM; 10632666ca91SSarangdhar Joshi 10642666ca91SSarangdhar Joshi segment->da = da; 10652666ca91SSarangdhar Joshi segment->size = size; 10662666ca91SSarangdhar Joshi 10672666ca91SSarangdhar Joshi list_add_tail(&segment->node, &rproc->dump_segments); 10682666ca91SSarangdhar Joshi 10692666ca91SSarangdhar Joshi return 0; 10702666ca91SSarangdhar Joshi } 10712666ca91SSarangdhar Joshi EXPORT_SYMBOL(rproc_coredump_add_segment); 10722666ca91SSarangdhar Joshi 10732666ca91SSarangdhar Joshi /** 10742666ca91SSarangdhar Joshi * rproc_coredump() - perform coredump 10752666ca91SSarangdhar Joshi * @rproc: rproc handle 10762666ca91SSarangdhar Joshi * 10772666ca91SSarangdhar Joshi * This function will generate an ELF header for the registered segments 10782666ca91SSarangdhar Joshi * and create a devcoredump device associated with rproc. 10792666ca91SSarangdhar Joshi */ 10802666ca91SSarangdhar Joshi static void rproc_coredump(struct rproc *rproc) 10812666ca91SSarangdhar Joshi { 10822666ca91SSarangdhar Joshi struct rproc_dump_segment *segment; 10832666ca91SSarangdhar Joshi struct elf32_phdr *phdr; 10842666ca91SSarangdhar Joshi struct elf32_hdr *ehdr; 10852666ca91SSarangdhar Joshi size_t data_size; 10862666ca91SSarangdhar Joshi size_t offset; 10872666ca91SSarangdhar Joshi void *data; 10882666ca91SSarangdhar Joshi void *ptr; 10892666ca91SSarangdhar Joshi int phnum = 0; 10902666ca91SSarangdhar Joshi 10912666ca91SSarangdhar Joshi if (list_empty(&rproc->dump_segments)) 10922666ca91SSarangdhar Joshi return; 10932666ca91SSarangdhar Joshi 10942666ca91SSarangdhar Joshi data_size = sizeof(*ehdr); 10952666ca91SSarangdhar Joshi list_for_each_entry(segment, &rproc->dump_segments, node) { 10962666ca91SSarangdhar Joshi data_size += sizeof(*phdr) + segment->size; 10972666ca91SSarangdhar Joshi 10982666ca91SSarangdhar Joshi phnum++; 10992666ca91SSarangdhar Joshi } 11002666ca91SSarangdhar Joshi 11012666ca91SSarangdhar Joshi data = vmalloc(data_size); 11022666ca91SSarangdhar Joshi if (!data) 11032666ca91SSarangdhar Joshi return; 11042666ca91SSarangdhar Joshi 11052666ca91SSarangdhar Joshi ehdr = data; 11062666ca91SSarangdhar Joshi 11072666ca91SSarangdhar Joshi memset(ehdr, 0, sizeof(*ehdr)); 11082666ca91SSarangdhar Joshi memcpy(ehdr->e_ident, ELFMAG, SELFMAG); 11092666ca91SSarangdhar Joshi ehdr->e_ident[EI_CLASS] = ELFCLASS32; 11102666ca91SSarangdhar Joshi ehdr->e_ident[EI_DATA] = ELFDATA2LSB; 11112666ca91SSarangdhar Joshi ehdr->e_ident[EI_VERSION] = EV_CURRENT; 11122666ca91SSarangdhar Joshi ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; 11132666ca91SSarangdhar Joshi ehdr->e_type = ET_CORE; 11142666ca91SSarangdhar Joshi ehdr->e_machine = EM_NONE; 11152666ca91SSarangdhar Joshi ehdr->e_version = EV_CURRENT; 11162666ca91SSarangdhar Joshi ehdr->e_entry = rproc->bootaddr; 11172666ca91SSarangdhar Joshi ehdr->e_phoff = sizeof(*ehdr); 11182666ca91SSarangdhar Joshi ehdr->e_ehsize = sizeof(*ehdr); 11192666ca91SSarangdhar Joshi ehdr->e_phentsize = sizeof(*phdr); 11202666ca91SSarangdhar Joshi ehdr->e_phnum = phnum; 11212666ca91SSarangdhar Joshi 11222666ca91SSarangdhar Joshi phdr = data + ehdr->e_phoff; 11232666ca91SSarangdhar Joshi offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum; 11242666ca91SSarangdhar Joshi list_for_each_entry(segment, &rproc->dump_segments, node) { 11252666ca91SSarangdhar Joshi memset(phdr, 0, sizeof(*phdr)); 11262666ca91SSarangdhar Joshi phdr->p_type = PT_LOAD; 11272666ca91SSarangdhar Joshi phdr->p_offset = offset; 11282666ca91SSarangdhar Joshi phdr->p_vaddr = segment->da; 11292666ca91SSarangdhar Joshi phdr->p_paddr = segment->da; 11302666ca91SSarangdhar Joshi phdr->p_filesz = segment->size; 11312666ca91SSarangdhar Joshi phdr->p_memsz = segment->size; 11322666ca91SSarangdhar Joshi phdr->p_flags = PF_R | PF_W | PF_X; 11332666ca91SSarangdhar Joshi phdr->p_align = 0; 11342666ca91SSarangdhar Joshi 11352666ca91SSarangdhar Joshi ptr = rproc_da_to_va(rproc, segment->da, segment->size); 11362666ca91SSarangdhar Joshi if (!ptr) { 11372666ca91SSarangdhar Joshi dev_err(&rproc->dev, 11382666ca91SSarangdhar Joshi "invalid coredump segment (%pad, %zu)\n", 11392666ca91SSarangdhar Joshi &segment->da, segment->size); 11402666ca91SSarangdhar Joshi memset(data + offset, 0xff, segment->size); 11412666ca91SSarangdhar Joshi } else { 11422666ca91SSarangdhar Joshi memcpy(data + offset, ptr, segment->size); 11432666ca91SSarangdhar Joshi } 11442666ca91SSarangdhar Joshi 11452666ca91SSarangdhar Joshi offset += phdr->p_filesz; 11462666ca91SSarangdhar Joshi phdr++; 11472666ca91SSarangdhar Joshi } 11482666ca91SSarangdhar Joshi 11492666ca91SSarangdhar Joshi dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL); 11502666ca91SSarangdhar Joshi } 11512666ca91SSarangdhar Joshi 11522666ca91SSarangdhar Joshi /** 115370b85ef8SFernando Guzman Lugo * rproc_trigger_recovery() - recover a remoteproc 115470b85ef8SFernando Guzman Lugo * @rproc: the remote processor 115570b85ef8SFernando Guzman Lugo * 115656324d7aSAnna, Suman * The recovery is done by resetting all the virtio devices, that way all the 115770b85ef8SFernando Guzman Lugo * rpmsg drivers will be reseted along with the remote processor making the 115870b85ef8SFernando Guzman Lugo * remoteproc functional again. 115970b85ef8SFernando Guzman Lugo * 116070b85ef8SFernando Guzman Lugo * This function can sleep, so it cannot be called from atomic context. 116170b85ef8SFernando Guzman Lugo */ 116270b85ef8SFernando Guzman Lugo int rproc_trigger_recovery(struct rproc *rproc) 116370b85ef8SFernando Guzman Lugo { 11647e83cab8SSarangdhar Joshi const struct firmware *firmware_p; 11657e83cab8SSarangdhar Joshi struct device *dev = &rproc->dev; 11667e83cab8SSarangdhar Joshi int ret; 11677e83cab8SSarangdhar Joshi 11687e83cab8SSarangdhar Joshi dev_err(dev, "recovering %s\n", rproc->name); 116970b85ef8SFernando Guzman Lugo 11707e83cab8SSarangdhar Joshi ret = mutex_lock_interruptible(&rproc->lock); 11717e83cab8SSarangdhar Joshi if (ret) 11727e83cab8SSarangdhar Joshi return ret; 11737e83cab8SSarangdhar Joshi 1174fcd58037SArnaud Pouliquen ret = rproc_stop(rproc, true); 11757e83cab8SSarangdhar Joshi if (ret) 11767e83cab8SSarangdhar Joshi goto unlock_mutex; 1177ddf71187SBjorn Andersson 11782666ca91SSarangdhar Joshi /* generate coredump */ 11792666ca91SSarangdhar Joshi rproc_coredump(rproc); 11802666ca91SSarangdhar Joshi 11817e83cab8SSarangdhar Joshi /* load firmware */ 11827e83cab8SSarangdhar Joshi ret = request_firmware(&firmware_p, rproc->firmware, dev); 11837e83cab8SSarangdhar Joshi if (ret < 0) { 11847e83cab8SSarangdhar Joshi dev_err(dev, "request_firmware failed: %d\n", ret); 11857e83cab8SSarangdhar Joshi goto unlock_mutex; 11867e83cab8SSarangdhar Joshi } 1187ddf71187SBjorn Andersson 11887e83cab8SSarangdhar Joshi /* boot the remote processor up again */ 11897e83cab8SSarangdhar Joshi ret = rproc_start(rproc, firmware_p); 11907e83cab8SSarangdhar Joshi 11917e83cab8SSarangdhar Joshi release_firmware(firmware_p); 11927e83cab8SSarangdhar Joshi 11937e83cab8SSarangdhar Joshi unlock_mutex: 11947e83cab8SSarangdhar Joshi mutex_unlock(&rproc->lock); 11957e83cab8SSarangdhar Joshi return ret; 119670b85ef8SFernando Guzman Lugo } 119770b85ef8SFernando Guzman Lugo 1198400e64dfSOhad Ben-Cohen /** 11998afd519cSFernando Guzman Lugo * rproc_crash_handler_work() - handle a crash 12008afd519cSFernando Guzman Lugo * 12018afd519cSFernando Guzman Lugo * This function needs to handle everything related to a crash, like cpu 12028afd519cSFernando Guzman Lugo * registers and stack dump, information to help to debug the fatal error, etc. 12038afd519cSFernando Guzman Lugo */ 12048afd519cSFernando Guzman Lugo static void rproc_crash_handler_work(struct work_struct *work) 12058afd519cSFernando Guzman Lugo { 12068afd519cSFernando Guzman Lugo struct rproc *rproc = container_of(work, struct rproc, crash_handler); 12078afd519cSFernando Guzman Lugo struct device *dev = &rproc->dev; 12088afd519cSFernando Guzman Lugo 12098afd519cSFernando Guzman Lugo dev_dbg(dev, "enter %s\n", __func__); 12108afd519cSFernando Guzman Lugo 12118afd519cSFernando Guzman Lugo mutex_lock(&rproc->lock); 12128afd519cSFernando Guzman Lugo 12138afd519cSFernando Guzman Lugo if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) { 12148afd519cSFernando Guzman Lugo /* handle only the first crash detected */ 12158afd519cSFernando Guzman Lugo mutex_unlock(&rproc->lock); 12168afd519cSFernando Guzman Lugo return; 12178afd519cSFernando Guzman Lugo } 12188afd519cSFernando Guzman Lugo 12198afd519cSFernando Guzman Lugo rproc->state = RPROC_CRASHED; 12208afd519cSFernando Guzman Lugo dev_err(dev, "handling crash #%u in %s\n", ++rproc->crash_cnt, 12218afd519cSFernando Guzman Lugo rproc->name); 12228afd519cSFernando Guzman Lugo 12238afd519cSFernando Guzman Lugo mutex_unlock(&rproc->lock); 12248afd519cSFernando Guzman Lugo 12252e37abb8SFernando Guzman Lugo if (!rproc->recovery_disabled) 122670b85ef8SFernando Guzman Lugo rproc_trigger_recovery(rproc); 12278afd519cSFernando Guzman Lugo } 12288afd519cSFernando Guzman Lugo 12298afd519cSFernando Guzman Lugo /** 12301b0ef906SSuman Anna * rproc_boot() - boot a remote processor 1231400e64dfSOhad Ben-Cohen * @rproc: handle of a remote processor 1232400e64dfSOhad Ben-Cohen * 1233400e64dfSOhad Ben-Cohen * Boot a remote processor (i.e. load its firmware, power it on, ...). 1234400e64dfSOhad Ben-Cohen * 1235400e64dfSOhad Ben-Cohen * If the remote processor is already powered on, this function immediately 1236400e64dfSOhad Ben-Cohen * returns (successfully). 1237400e64dfSOhad Ben-Cohen * 1238400e64dfSOhad Ben-Cohen * Returns 0 on success, and an appropriate error value otherwise. 1239400e64dfSOhad Ben-Cohen */ 12401b0ef906SSuman Anna int rproc_boot(struct rproc *rproc) 1241400e64dfSOhad Ben-Cohen { 1242400e64dfSOhad Ben-Cohen const struct firmware *firmware_p; 1243400e64dfSOhad Ben-Cohen struct device *dev; 1244400e64dfSOhad Ben-Cohen int ret; 1245400e64dfSOhad Ben-Cohen 1246400e64dfSOhad Ben-Cohen if (!rproc) { 1247400e64dfSOhad Ben-Cohen pr_err("invalid rproc handle\n"); 1248400e64dfSOhad Ben-Cohen return -EINVAL; 1249400e64dfSOhad Ben-Cohen } 1250400e64dfSOhad Ben-Cohen 1251b5ab5e24SOhad Ben-Cohen dev = &rproc->dev; 1252400e64dfSOhad Ben-Cohen 1253400e64dfSOhad Ben-Cohen ret = mutex_lock_interruptible(&rproc->lock); 1254400e64dfSOhad Ben-Cohen if (ret) { 1255400e64dfSOhad Ben-Cohen dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); 1256400e64dfSOhad Ben-Cohen return ret; 1257400e64dfSOhad Ben-Cohen } 1258400e64dfSOhad Ben-Cohen 12592099c77dSSarangdhar Joshi if (rproc->state == RPROC_DELETED) { 12602099c77dSSarangdhar Joshi ret = -ENODEV; 12612099c77dSSarangdhar Joshi dev_err(dev, "can't boot deleted rproc %s\n", rproc->name); 12622099c77dSSarangdhar Joshi goto unlock_mutex; 12632099c77dSSarangdhar Joshi } 12642099c77dSSarangdhar Joshi 1265400e64dfSOhad Ben-Cohen /* skip the boot process if rproc is already powered up */ 1266400e64dfSOhad Ben-Cohen if (atomic_inc_return(&rproc->power) > 1) { 1267400e64dfSOhad Ben-Cohen ret = 0; 1268400e64dfSOhad Ben-Cohen goto unlock_mutex; 1269400e64dfSOhad Ben-Cohen } 1270400e64dfSOhad Ben-Cohen 1271400e64dfSOhad Ben-Cohen dev_info(dev, "powering up %s\n", rproc->name); 1272400e64dfSOhad Ben-Cohen 1273400e64dfSOhad Ben-Cohen /* load firmware */ 1274400e64dfSOhad Ben-Cohen ret = request_firmware(&firmware_p, rproc->firmware, dev); 1275400e64dfSOhad Ben-Cohen if (ret < 0) { 1276400e64dfSOhad Ben-Cohen dev_err(dev, "request_firmware failed: %d\n", ret); 1277400e64dfSOhad Ben-Cohen goto downref_rproc; 1278400e64dfSOhad Ben-Cohen } 1279400e64dfSOhad Ben-Cohen 1280400e64dfSOhad Ben-Cohen ret = rproc_fw_boot(rproc, firmware_p); 1281400e64dfSOhad Ben-Cohen 1282400e64dfSOhad Ben-Cohen release_firmware(firmware_p); 1283400e64dfSOhad Ben-Cohen 1284400e64dfSOhad Ben-Cohen downref_rproc: 1285fbb6aacbSBjorn Andersson if (ret) 1286400e64dfSOhad Ben-Cohen atomic_dec(&rproc->power); 1287400e64dfSOhad Ben-Cohen unlock_mutex: 1288400e64dfSOhad Ben-Cohen mutex_unlock(&rproc->lock); 1289400e64dfSOhad Ben-Cohen return ret; 1290400e64dfSOhad Ben-Cohen } 1291400e64dfSOhad Ben-Cohen EXPORT_SYMBOL(rproc_boot); 1292400e64dfSOhad Ben-Cohen 1293400e64dfSOhad Ben-Cohen /** 1294400e64dfSOhad Ben-Cohen * rproc_shutdown() - power off the remote processor 1295400e64dfSOhad Ben-Cohen * @rproc: the remote processor 1296400e64dfSOhad Ben-Cohen * 1297400e64dfSOhad Ben-Cohen * Power off a remote processor (previously booted with rproc_boot()). 1298400e64dfSOhad Ben-Cohen * 1299400e64dfSOhad Ben-Cohen * In case @rproc is still being used by an additional user(s), then 1300400e64dfSOhad Ben-Cohen * this function will just decrement the power refcount and exit, 1301400e64dfSOhad Ben-Cohen * without really powering off the device. 1302400e64dfSOhad Ben-Cohen * 1303400e64dfSOhad Ben-Cohen * Every call to rproc_boot() must (eventually) be accompanied by a call 1304400e64dfSOhad Ben-Cohen * to rproc_shutdown(). Calling rproc_shutdown() redundantly is a bug. 1305400e64dfSOhad Ben-Cohen * 1306400e64dfSOhad Ben-Cohen * Notes: 1307400e64dfSOhad Ben-Cohen * - we're not decrementing the rproc's refcount, only the power refcount. 1308400e64dfSOhad Ben-Cohen * which means that the @rproc handle stays valid even after rproc_shutdown() 1309400e64dfSOhad Ben-Cohen * returns, and users can still use it with a subsequent rproc_boot(), if 1310400e64dfSOhad Ben-Cohen * needed. 1311400e64dfSOhad Ben-Cohen */ 1312400e64dfSOhad Ben-Cohen void rproc_shutdown(struct rproc *rproc) 1313400e64dfSOhad Ben-Cohen { 1314b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 1315400e64dfSOhad Ben-Cohen int ret; 1316400e64dfSOhad Ben-Cohen 1317400e64dfSOhad Ben-Cohen ret = mutex_lock_interruptible(&rproc->lock); 1318400e64dfSOhad Ben-Cohen if (ret) { 1319400e64dfSOhad Ben-Cohen dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret); 1320400e64dfSOhad Ben-Cohen return; 1321400e64dfSOhad Ben-Cohen } 1322400e64dfSOhad Ben-Cohen 1323400e64dfSOhad Ben-Cohen /* if the remote proc is still needed, bail out */ 1324400e64dfSOhad Ben-Cohen if (!atomic_dec_and_test(&rproc->power)) 1325400e64dfSOhad Ben-Cohen goto out; 1326400e64dfSOhad Ben-Cohen 1327fcd58037SArnaud Pouliquen ret = rproc_stop(rproc, false); 1328400e64dfSOhad Ben-Cohen if (ret) { 1329400e64dfSOhad Ben-Cohen atomic_inc(&rproc->power); 1330400e64dfSOhad Ben-Cohen goto out; 1331400e64dfSOhad Ben-Cohen } 1332400e64dfSOhad Ben-Cohen 1333400e64dfSOhad Ben-Cohen /* clean up all acquired resources */ 1334400e64dfSOhad Ben-Cohen rproc_resource_cleanup(rproc); 1335400e64dfSOhad Ben-Cohen 1336400e64dfSOhad Ben-Cohen rproc_disable_iommu(rproc); 1337400e64dfSOhad Ben-Cohen 1338988d204cSBjorn Andersson /* Free the copy of the resource table */ 1339a0c10687SBjorn Andersson kfree(rproc->cached_table); 1340a0c10687SBjorn Andersson rproc->cached_table = NULL; 1341988d204cSBjorn Andersson rproc->table_ptr = NULL; 1342400e64dfSOhad Ben-Cohen out: 1343400e64dfSOhad Ben-Cohen mutex_unlock(&rproc->lock); 1344400e64dfSOhad Ben-Cohen } 1345400e64dfSOhad Ben-Cohen EXPORT_SYMBOL(rproc_shutdown); 1346400e64dfSOhad Ben-Cohen 1347400e64dfSOhad Ben-Cohen /** 1348fec47d86SDave Gerlach * rproc_get_by_phandle() - find a remote processor by phandle 1349fec47d86SDave Gerlach * @phandle: phandle to the rproc 1350fec47d86SDave Gerlach * 1351fec47d86SDave Gerlach * Finds an rproc handle using the remote processor's phandle, and then 1352fec47d86SDave Gerlach * return a handle to the rproc. 1353fec47d86SDave Gerlach * 1354fec47d86SDave Gerlach * This function increments the remote processor's refcount, so always 1355fec47d86SDave Gerlach * use rproc_put() to decrement it back once rproc isn't needed anymore. 1356fec47d86SDave Gerlach * 1357fec47d86SDave Gerlach * Returns the rproc handle on success, and NULL on failure. 1358fec47d86SDave Gerlach */ 13598de3dbd0SOhad Ben-Cohen #ifdef CONFIG_OF 1360fec47d86SDave Gerlach struct rproc *rproc_get_by_phandle(phandle phandle) 1361fec47d86SDave Gerlach { 1362fec47d86SDave Gerlach struct rproc *rproc = NULL, *r; 1363fec47d86SDave Gerlach struct device_node *np; 1364fec47d86SDave Gerlach 1365fec47d86SDave Gerlach np = of_find_node_by_phandle(phandle); 1366fec47d86SDave Gerlach if (!np) 1367fec47d86SDave Gerlach return NULL; 1368fec47d86SDave Gerlach 1369fec47d86SDave Gerlach mutex_lock(&rproc_list_mutex); 1370fec47d86SDave Gerlach list_for_each_entry(r, &rproc_list, node) { 1371fec47d86SDave Gerlach if (r->dev.parent && r->dev.parent->of_node == np) { 1372fbb6aacbSBjorn Andersson /* prevent underlying implementation from being removed */ 1373fbb6aacbSBjorn Andersson if (!try_module_get(r->dev.parent->driver->owner)) { 1374fbb6aacbSBjorn Andersson dev_err(&r->dev, "can't get owner\n"); 1375fbb6aacbSBjorn Andersson break; 1376fbb6aacbSBjorn Andersson } 1377fbb6aacbSBjorn Andersson 1378fec47d86SDave Gerlach rproc = r; 1379fec47d86SDave Gerlach get_device(&rproc->dev); 1380fec47d86SDave Gerlach break; 1381fec47d86SDave Gerlach } 1382fec47d86SDave Gerlach } 1383fec47d86SDave Gerlach mutex_unlock(&rproc_list_mutex); 1384fec47d86SDave Gerlach 1385fec47d86SDave Gerlach of_node_put(np); 1386fec47d86SDave Gerlach 1387fec47d86SDave Gerlach return rproc; 1388fec47d86SDave Gerlach } 13898de3dbd0SOhad Ben-Cohen #else 13908de3dbd0SOhad Ben-Cohen struct rproc *rproc_get_by_phandle(phandle phandle) 13918de3dbd0SOhad Ben-Cohen { 13928de3dbd0SOhad Ben-Cohen return NULL; 13938de3dbd0SOhad Ben-Cohen } 13948de3dbd0SOhad Ben-Cohen #endif 1395fec47d86SDave Gerlach EXPORT_SYMBOL(rproc_get_by_phandle); 1396fec47d86SDave Gerlach 1397fec47d86SDave Gerlach /** 1398160e7c84SOhad Ben-Cohen * rproc_add() - register a remote processor 1399400e64dfSOhad Ben-Cohen * @rproc: the remote processor handle to register 1400400e64dfSOhad Ben-Cohen * 1401400e64dfSOhad Ben-Cohen * Registers @rproc with the remoteproc framework, after it has been 1402400e64dfSOhad Ben-Cohen * allocated with rproc_alloc(). 1403400e64dfSOhad Ben-Cohen * 1404400e64dfSOhad Ben-Cohen * This is called by the platform-specific rproc implementation, whenever 1405400e64dfSOhad Ben-Cohen * a new remote processor device is probed. 1406400e64dfSOhad Ben-Cohen * 1407400e64dfSOhad Ben-Cohen * Returns 0 on success and an appropriate error code otherwise. 1408400e64dfSOhad Ben-Cohen * 1409400e64dfSOhad Ben-Cohen * Note: this function initiates an asynchronous firmware loading 1410400e64dfSOhad Ben-Cohen * context, which will look for virtio devices supported by the rproc's 1411400e64dfSOhad Ben-Cohen * firmware. 1412400e64dfSOhad Ben-Cohen * 1413400e64dfSOhad Ben-Cohen * If found, those virtio devices will be created and added, so as a result 14147a186941SOhad Ben-Cohen * of registering this remote processor, additional virtio drivers might be 1415400e64dfSOhad Ben-Cohen * probed. 1416400e64dfSOhad Ben-Cohen */ 1417160e7c84SOhad Ben-Cohen int rproc_add(struct rproc *rproc) 1418400e64dfSOhad Ben-Cohen { 1419b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 142070b85ef8SFernando Guzman Lugo int ret; 1421400e64dfSOhad Ben-Cohen 1422b5ab5e24SOhad Ben-Cohen ret = device_add(dev); 1423b5ab5e24SOhad Ben-Cohen if (ret < 0) 1424b5ab5e24SOhad Ben-Cohen return ret; 1425400e64dfSOhad Ben-Cohen 1426b5ab5e24SOhad Ben-Cohen dev_info(dev, "%s is available\n", rproc->name); 1427400e64dfSOhad Ben-Cohen 1428400e64dfSOhad Ben-Cohen /* create debugfs entries */ 1429400e64dfSOhad Ben-Cohen rproc_create_debug_dir(rproc); 14307a20c64dSSarangdhar Joshi 14317a20c64dSSarangdhar Joshi /* if rproc is marked always-on, request it to boot */ 14327a20c64dSSarangdhar Joshi if (rproc->auto_boot) { 14335e6533f7SSarangdhar Joshi ret = rproc_trigger_auto_boot(rproc); 1434d2e12e66SDave Gerlach if (ret < 0) 1435d2e12e66SDave Gerlach return ret; 14367a20c64dSSarangdhar Joshi } 1437400e64dfSOhad Ben-Cohen 1438d2e12e66SDave Gerlach /* expose to rproc_get_by_phandle users */ 1439d2e12e66SDave Gerlach mutex_lock(&rproc_list_mutex); 1440d2e12e66SDave Gerlach list_add(&rproc->node, &rproc_list); 1441d2e12e66SDave Gerlach mutex_unlock(&rproc_list_mutex); 1442d2e12e66SDave Gerlach 1443d2e12e66SDave Gerlach return 0; 1444400e64dfSOhad Ben-Cohen } 1445160e7c84SOhad Ben-Cohen EXPORT_SYMBOL(rproc_add); 1446400e64dfSOhad Ben-Cohen 1447400e64dfSOhad Ben-Cohen /** 1448b5ab5e24SOhad Ben-Cohen * rproc_type_release() - release a remote processor instance 1449b5ab5e24SOhad Ben-Cohen * @dev: the rproc's device 1450b5ab5e24SOhad Ben-Cohen * 1451b5ab5e24SOhad Ben-Cohen * This function should _never_ be called directly. 1452b5ab5e24SOhad Ben-Cohen * 1453b5ab5e24SOhad Ben-Cohen * It will be called by the driver core when no one holds a valid pointer 1454b5ab5e24SOhad Ben-Cohen * to @dev anymore. 1455b5ab5e24SOhad Ben-Cohen */ 1456b5ab5e24SOhad Ben-Cohen static void rproc_type_release(struct device *dev) 1457b5ab5e24SOhad Ben-Cohen { 1458b5ab5e24SOhad Ben-Cohen struct rproc *rproc = container_of(dev, struct rproc, dev); 1459b5ab5e24SOhad Ben-Cohen 14607183a2a7SOhad Ben-Cohen dev_info(&rproc->dev, "releasing %s\n", rproc->name); 14617183a2a7SOhad Ben-Cohen 1462b5ab5e24SOhad Ben-Cohen idr_destroy(&rproc->notifyids); 1463b5ab5e24SOhad Ben-Cohen 1464b5ab5e24SOhad Ben-Cohen if (rproc->index >= 0) 1465b5ab5e24SOhad Ben-Cohen ida_simple_remove(&rproc_dev_index, rproc->index); 1466b5ab5e24SOhad Ben-Cohen 14670f57dc6aSMatt Redfearn kfree(rproc->firmware); 1468fb98e2bdSBjorn Andersson kfree(rproc->ops); 1469b5ab5e24SOhad Ben-Cohen kfree(rproc); 1470b5ab5e24SOhad Ben-Cohen } 1471b5ab5e24SOhad Ben-Cohen 1472c42ca04dSBhumika Goyal static const struct device_type rproc_type = { 1473b5ab5e24SOhad Ben-Cohen .name = "remoteproc", 1474b5ab5e24SOhad Ben-Cohen .release = rproc_type_release, 1475b5ab5e24SOhad Ben-Cohen }; 1476400e64dfSOhad Ben-Cohen 1477400e64dfSOhad Ben-Cohen /** 1478400e64dfSOhad Ben-Cohen * rproc_alloc() - allocate a remote processor handle 1479400e64dfSOhad Ben-Cohen * @dev: the underlying device 1480400e64dfSOhad Ben-Cohen * @name: name of this remote processor 1481400e64dfSOhad Ben-Cohen * @ops: platform-specific handlers (mainly start/stop) 14828b4aec9aSRobert Tivy * @firmware: name of firmware file to load, can be NULL 1483400e64dfSOhad Ben-Cohen * @len: length of private data needed by the rproc driver (in bytes) 1484400e64dfSOhad Ben-Cohen * 1485400e64dfSOhad Ben-Cohen * Allocates a new remote processor handle, but does not register 14868b4aec9aSRobert Tivy * it yet. if @firmware is NULL, a default name is used. 1487400e64dfSOhad Ben-Cohen * 1488400e64dfSOhad Ben-Cohen * This function should be used by rproc implementations during initialization 1489400e64dfSOhad Ben-Cohen * of the remote processor. 1490400e64dfSOhad Ben-Cohen * 1491400e64dfSOhad Ben-Cohen * After creating an rproc handle using this function, and when ready, 1492160e7c84SOhad Ben-Cohen * implementations should then call rproc_add() to complete 1493400e64dfSOhad Ben-Cohen * the registration of the remote processor. 1494400e64dfSOhad Ben-Cohen * 1495400e64dfSOhad Ben-Cohen * On success the new rproc is returned, and on failure, NULL. 1496400e64dfSOhad Ben-Cohen * 1497400e64dfSOhad Ben-Cohen * Note: _never_ directly deallocate @rproc, even if it was not registered 1498433c0e04SBjorn Andersson * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free(). 1499400e64dfSOhad Ben-Cohen */ 1500400e64dfSOhad Ben-Cohen struct rproc *rproc_alloc(struct device *dev, const char *name, 1501400e64dfSOhad Ben-Cohen const struct rproc_ops *ops, 1502400e64dfSOhad Ben-Cohen const char *firmware, int len) 1503400e64dfSOhad Ben-Cohen { 1504400e64dfSOhad Ben-Cohen struct rproc *rproc; 15058b4aec9aSRobert Tivy char *p, *template = "rproc-%s-fw"; 15060f57dc6aSMatt Redfearn int name_len; 1507400e64dfSOhad Ben-Cohen 1508400e64dfSOhad Ben-Cohen if (!dev || !name || !ops) 1509400e64dfSOhad Ben-Cohen return NULL; 1510400e64dfSOhad Ben-Cohen 15110f57dc6aSMatt Redfearn if (!firmware) { 15128b4aec9aSRobert Tivy /* 15138b4aec9aSRobert Tivy * If the caller didn't pass in a firmware name then 15140f57dc6aSMatt Redfearn * construct a default name. 15158b4aec9aSRobert Tivy */ 15168b4aec9aSRobert Tivy name_len = strlen(name) + strlen(template) - 2 + 1; 15170f57dc6aSMatt Redfearn p = kmalloc(name_len, GFP_KERNEL); 15180f57dc6aSMatt Redfearn if (!p) 1519400e64dfSOhad Ben-Cohen return NULL; 15208b4aec9aSRobert Tivy snprintf(p, name_len, template, name); 15218b4aec9aSRobert Tivy } else { 15220f57dc6aSMatt Redfearn p = kstrdup(firmware, GFP_KERNEL); 15230f57dc6aSMatt Redfearn if (!p) 15240f57dc6aSMatt Redfearn return NULL; 15250f57dc6aSMatt Redfearn } 15260f57dc6aSMatt Redfearn 15270f57dc6aSMatt Redfearn rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL); 15280f57dc6aSMatt Redfearn if (!rproc) { 15290f57dc6aSMatt Redfearn kfree(p); 15300f57dc6aSMatt Redfearn return NULL; 15318b4aec9aSRobert Tivy } 15328b4aec9aSRobert Tivy 1533fb98e2bdSBjorn Andersson rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL); 1534fb98e2bdSBjorn Andersson if (!rproc->ops) { 1535fb98e2bdSBjorn Andersson kfree(p); 1536fb98e2bdSBjorn Andersson kfree(rproc); 1537fb98e2bdSBjorn Andersson return NULL; 1538fb98e2bdSBjorn Andersson } 1539fb98e2bdSBjorn Andersson 15408b4aec9aSRobert Tivy rproc->firmware = p; 1541400e64dfSOhad Ben-Cohen rproc->name = name; 1542400e64dfSOhad Ben-Cohen rproc->priv = &rproc[1]; 1543ddf71187SBjorn Andersson rproc->auto_boot = true; 1544400e64dfSOhad Ben-Cohen 1545b5ab5e24SOhad Ben-Cohen device_initialize(&rproc->dev); 1546b5ab5e24SOhad Ben-Cohen rproc->dev.parent = dev; 1547b5ab5e24SOhad Ben-Cohen rproc->dev.type = &rproc_type; 15482aefbef0SMatt Redfearn rproc->dev.class = &rproc_class; 15497c89717fSBjorn Andersson rproc->dev.driver_data = rproc; 1550b5ab5e24SOhad Ben-Cohen 1551b5ab5e24SOhad Ben-Cohen /* Assign a unique device index and name */ 1552b5ab5e24SOhad Ben-Cohen rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL); 1553b5ab5e24SOhad Ben-Cohen if (rproc->index < 0) { 1554b5ab5e24SOhad Ben-Cohen dev_err(dev, "ida_simple_get failed: %d\n", rproc->index); 1555b5ab5e24SOhad Ben-Cohen put_device(&rproc->dev); 1556b5ab5e24SOhad Ben-Cohen return NULL; 1557b5ab5e24SOhad Ben-Cohen } 1558b5ab5e24SOhad Ben-Cohen 1559b5ab5e24SOhad Ben-Cohen dev_set_name(&rproc->dev, "remoteproc%d", rproc->index); 1560b5ab5e24SOhad Ben-Cohen 1561400e64dfSOhad Ben-Cohen atomic_set(&rproc->power, 0); 1562400e64dfSOhad Ben-Cohen 15630f21f9ccSBjorn Andersson /* Default to ELF loader if no load function is specified */ 15640f21f9ccSBjorn Andersson if (!rproc->ops->load) { 15650f21f9ccSBjorn Andersson rproc->ops->load = rproc_elf_load_segments; 1566c1d35c1aSBjorn Andersson rproc->ops->parse_fw = rproc_elf_load_rsc_table; 15670f21f9ccSBjorn Andersson rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table; 15680f21f9ccSBjorn Andersson rproc->ops->sanity_check = rproc_elf_sanity_check; 15690f21f9ccSBjorn Andersson rproc->ops->get_boot_addr = rproc_elf_get_boot_addr; 15700f21f9ccSBjorn Andersson } 1571400e64dfSOhad Ben-Cohen 1572400e64dfSOhad Ben-Cohen mutex_init(&rproc->lock); 1573400e64dfSOhad Ben-Cohen 15747a186941SOhad Ben-Cohen idr_init(&rproc->notifyids); 15757a186941SOhad Ben-Cohen 1576400e64dfSOhad Ben-Cohen INIT_LIST_HEAD(&rproc->carveouts); 1577400e64dfSOhad Ben-Cohen INIT_LIST_HEAD(&rproc->mappings); 1578400e64dfSOhad Ben-Cohen INIT_LIST_HEAD(&rproc->traces); 15797a186941SOhad Ben-Cohen INIT_LIST_HEAD(&rproc->rvdevs); 15807bdc9650SBjorn Andersson INIT_LIST_HEAD(&rproc->subdevs); 15812666ca91SSarangdhar Joshi INIT_LIST_HEAD(&rproc->dump_segments); 1582400e64dfSOhad Ben-Cohen 15838afd519cSFernando Guzman Lugo INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work); 15848afd519cSFernando Guzman Lugo 1585400e64dfSOhad Ben-Cohen rproc->state = RPROC_OFFLINE; 1586400e64dfSOhad Ben-Cohen 1587400e64dfSOhad Ben-Cohen return rproc; 1588400e64dfSOhad Ben-Cohen } 1589400e64dfSOhad Ben-Cohen EXPORT_SYMBOL(rproc_alloc); 1590400e64dfSOhad Ben-Cohen 1591400e64dfSOhad Ben-Cohen /** 1592433c0e04SBjorn Andersson * rproc_free() - unroll rproc_alloc() 1593433c0e04SBjorn Andersson * @rproc: the remote processor handle 1594433c0e04SBjorn Andersson * 1595433c0e04SBjorn Andersson * This function decrements the rproc dev refcount. 1596433c0e04SBjorn Andersson * 1597433c0e04SBjorn Andersson * If no one holds any reference to rproc anymore, then its refcount would 1598433c0e04SBjorn Andersson * now drop to zero, and it would be freed. 1599433c0e04SBjorn Andersson */ 1600433c0e04SBjorn Andersson void rproc_free(struct rproc *rproc) 1601433c0e04SBjorn Andersson { 1602433c0e04SBjorn Andersson put_device(&rproc->dev); 1603433c0e04SBjorn Andersson } 1604433c0e04SBjorn Andersson EXPORT_SYMBOL(rproc_free); 1605433c0e04SBjorn Andersson 1606433c0e04SBjorn Andersson /** 1607433c0e04SBjorn Andersson * rproc_put() - release rproc reference 1608400e64dfSOhad Ben-Cohen * @rproc: the remote processor handle 1609400e64dfSOhad Ben-Cohen * 1610c6b5a276SOhad Ben-Cohen * This function decrements the rproc dev refcount. 1611400e64dfSOhad Ben-Cohen * 1612c6b5a276SOhad Ben-Cohen * If no one holds any reference to rproc anymore, then its refcount would 1613c6b5a276SOhad Ben-Cohen * now drop to zero, and it would be freed. 1614400e64dfSOhad Ben-Cohen */ 1615160e7c84SOhad Ben-Cohen void rproc_put(struct rproc *rproc) 1616400e64dfSOhad Ben-Cohen { 1617fbb6aacbSBjorn Andersson module_put(rproc->dev.parent->driver->owner); 1618b5ab5e24SOhad Ben-Cohen put_device(&rproc->dev); 1619400e64dfSOhad Ben-Cohen } 1620160e7c84SOhad Ben-Cohen EXPORT_SYMBOL(rproc_put); 1621400e64dfSOhad Ben-Cohen 1622400e64dfSOhad Ben-Cohen /** 1623160e7c84SOhad Ben-Cohen * rproc_del() - unregister a remote processor 1624400e64dfSOhad Ben-Cohen * @rproc: rproc handle to unregister 1625400e64dfSOhad Ben-Cohen * 1626400e64dfSOhad Ben-Cohen * This function should be called when the platform specific rproc 1627400e64dfSOhad Ben-Cohen * implementation decides to remove the rproc device. it should 1628160e7c84SOhad Ben-Cohen * _only_ be called if a previous invocation of rproc_add() 1629400e64dfSOhad Ben-Cohen * has completed successfully. 1630400e64dfSOhad Ben-Cohen * 1631160e7c84SOhad Ben-Cohen * After rproc_del() returns, @rproc isn't freed yet, because 1632c6b5a276SOhad Ben-Cohen * of the outstanding reference created by rproc_alloc. To decrement that 1633433c0e04SBjorn Andersson * one last refcount, one still needs to call rproc_free(). 1634400e64dfSOhad Ben-Cohen * 1635400e64dfSOhad Ben-Cohen * Returns 0 on success and -EINVAL if @rproc isn't valid. 1636400e64dfSOhad Ben-Cohen */ 1637160e7c84SOhad Ben-Cohen int rproc_del(struct rproc *rproc) 1638400e64dfSOhad Ben-Cohen { 1639400e64dfSOhad Ben-Cohen if (!rproc) 1640400e64dfSOhad Ben-Cohen return -EINVAL; 1641400e64dfSOhad Ben-Cohen 1642ddf71187SBjorn Andersson /* if rproc is marked always-on, rproc_add() booted it */ 1643ddf71187SBjorn Andersson /* TODO: make sure this works with rproc->power > 1 */ 1644ddf71187SBjorn Andersson if (rproc->auto_boot) 1645ddf71187SBjorn Andersson rproc_shutdown(rproc); 1646ddf71187SBjorn Andersson 16472099c77dSSarangdhar Joshi mutex_lock(&rproc->lock); 16482099c77dSSarangdhar Joshi rproc->state = RPROC_DELETED; 16492099c77dSSarangdhar Joshi mutex_unlock(&rproc->lock); 16502099c77dSSarangdhar Joshi 1651b003d45bSSarangdhar Joshi rproc_delete_debug_dir(rproc); 1652b003d45bSSarangdhar Joshi 1653fec47d86SDave Gerlach /* the rproc is downref'ed as soon as it's removed from the klist */ 1654fec47d86SDave Gerlach mutex_lock(&rproc_list_mutex); 1655fec47d86SDave Gerlach list_del(&rproc->node); 1656fec47d86SDave Gerlach mutex_unlock(&rproc_list_mutex); 1657fec47d86SDave Gerlach 1658b5ab5e24SOhad Ben-Cohen device_del(&rproc->dev); 1659400e64dfSOhad Ben-Cohen 1660400e64dfSOhad Ben-Cohen return 0; 1661400e64dfSOhad Ben-Cohen } 1662160e7c84SOhad Ben-Cohen EXPORT_SYMBOL(rproc_del); 1663400e64dfSOhad Ben-Cohen 16648afd519cSFernando Guzman Lugo /** 16657bdc9650SBjorn Andersson * rproc_add_subdev() - add a subdevice to a remoteproc 16667bdc9650SBjorn Andersson * @rproc: rproc handle to add the subdevice to 16677bdc9650SBjorn Andersson * @subdev: subdev handle to register 16684902676fSBjorn Andersson * 16694902676fSBjorn Andersson * Caller is responsible for populating optional subdevice function pointers. 16707bdc9650SBjorn Andersson */ 16714902676fSBjorn Andersson void rproc_add_subdev(struct rproc *rproc, struct rproc_subdev *subdev) 16727bdc9650SBjorn Andersson { 16737bdc9650SBjorn Andersson list_add_tail(&subdev->node, &rproc->subdevs); 16747bdc9650SBjorn Andersson } 16757bdc9650SBjorn Andersson EXPORT_SYMBOL(rproc_add_subdev); 16767bdc9650SBjorn Andersson 16777bdc9650SBjorn Andersson /** 16787bdc9650SBjorn Andersson * rproc_remove_subdev() - remove a subdevice from a remoteproc 16797bdc9650SBjorn Andersson * @rproc: rproc handle to remove the subdevice from 16807bdc9650SBjorn Andersson * @subdev: subdev handle, previously registered with rproc_add_subdev() 16817bdc9650SBjorn Andersson */ 16827bdc9650SBjorn Andersson void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev) 16837bdc9650SBjorn Andersson { 16847bdc9650SBjorn Andersson list_del(&subdev->node); 16857bdc9650SBjorn Andersson } 16867bdc9650SBjorn Andersson EXPORT_SYMBOL(rproc_remove_subdev); 16877bdc9650SBjorn Andersson 16887bdc9650SBjorn Andersson /** 16897c89717fSBjorn Andersson * rproc_get_by_child() - acquire rproc handle of @dev's ancestor 16907c89717fSBjorn Andersson * @dev: child device to find ancestor of 16917c89717fSBjorn Andersson * 16927c89717fSBjorn Andersson * Returns the ancestor rproc instance, or NULL if not found. 16937c89717fSBjorn Andersson */ 16947c89717fSBjorn Andersson struct rproc *rproc_get_by_child(struct device *dev) 16957c89717fSBjorn Andersson { 16967c89717fSBjorn Andersson for (dev = dev->parent; dev; dev = dev->parent) { 16977c89717fSBjorn Andersson if (dev->type == &rproc_type) 16987c89717fSBjorn Andersson return dev->driver_data; 16997c89717fSBjorn Andersson } 17007c89717fSBjorn Andersson 17017c89717fSBjorn Andersson return NULL; 17027c89717fSBjorn Andersson } 17037c89717fSBjorn Andersson EXPORT_SYMBOL(rproc_get_by_child); 17047c89717fSBjorn Andersson 17057c89717fSBjorn Andersson /** 17068afd519cSFernando Guzman Lugo * rproc_report_crash() - rproc crash reporter function 17078afd519cSFernando Guzman Lugo * @rproc: remote processor 17088afd519cSFernando Guzman Lugo * @type: crash type 17098afd519cSFernando Guzman Lugo * 17108afd519cSFernando Guzman Lugo * This function must be called every time a crash is detected by the low-level 17118afd519cSFernando Guzman Lugo * drivers implementing a specific remoteproc. This should not be called from a 17128afd519cSFernando Guzman Lugo * non-remoteproc driver. 17138afd519cSFernando Guzman Lugo * 17148afd519cSFernando Guzman Lugo * This function can be called from atomic/interrupt context. 17158afd519cSFernando Guzman Lugo */ 17168afd519cSFernando Guzman Lugo void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type) 17178afd519cSFernando Guzman Lugo { 17188afd519cSFernando Guzman Lugo if (!rproc) { 17198afd519cSFernando Guzman Lugo pr_err("NULL rproc pointer\n"); 17208afd519cSFernando Guzman Lugo return; 17218afd519cSFernando Guzman Lugo } 17228afd519cSFernando Guzman Lugo 17238afd519cSFernando Guzman Lugo dev_err(&rproc->dev, "crash detected in %s: type %s\n", 17248afd519cSFernando Guzman Lugo rproc->name, rproc_crash_to_string(type)); 17258afd519cSFernando Guzman Lugo 17268afd519cSFernando Guzman Lugo /* create a new task to handle the error */ 17278afd519cSFernando Guzman Lugo schedule_work(&rproc->crash_handler); 17288afd519cSFernando Guzman Lugo } 17298afd519cSFernando Guzman Lugo EXPORT_SYMBOL(rproc_report_crash); 17308afd519cSFernando Guzman Lugo 1731400e64dfSOhad Ben-Cohen static int __init remoteproc_init(void) 1732400e64dfSOhad Ben-Cohen { 17332aefbef0SMatt Redfearn rproc_init_sysfs(); 1734400e64dfSOhad Ben-Cohen rproc_init_debugfs(); 1735b5ab5e24SOhad Ben-Cohen 1736400e64dfSOhad Ben-Cohen return 0; 1737400e64dfSOhad Ben-Cohen } 1738400e64dfSOhad Ben-Cohen module_init(remoteproc_init); 1739400e64dfSOhad Ben-Cohen 1740400e64dfSOhad Ben-Cohen static void __exit remoteproc_exit(void) 1741400e64dfSOhad Ben-Cohen { 1742f42f79afSSuman Anna ida_destroy(&rproc_dev_index); 1743f42f79afSSuman Anna 1744400e64dfSOhad Ben-Cohen rproc_exit_debugfs(); 17452aefbef0SMatt Redfearn rproc_exit_sysfs(); 1746400e64dfSOhad Ben-Cohen } 1747400e64dfSOhad Ben-Cohen module_exit(remoteproc_exit); 1748400e64dfSOhad Ben-Cohen 1749400e64dfSOhad Ben-Cohen MODULE_LICENSE("GPL v2"); 1750400e64dfSOhad Ben-Cohen MODULE_DESCRIPTION("Generic Remote Processor Framework"); 1751