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-rw-r--r--drivers/misc/fastrpc.c2482
1 files changed, 2482 insertions, 0 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
new file mode 100644
index 0000000000..1c6c62a7f7
--- /dev/null
+++ b/drivers/misc/fastrpc.c
@@ -0,0 +1,2482 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
+// Copyright (c) 2018, Linaro Limited
+
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/dma-buf.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma-resv.h>
+#include <linux/idr.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/sort.h>
+#include <linux/of_platform.h>
+#include <linux/rpmsg.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/firmware/qcom/qcom_scm.h>
+#include <uapi/misc/fastrpc.h>
+#include <linux/of_reserved_mem.h>
+
+#define ADSP_DOMAIN_ID (0)
+#define MDSP_DOMAIN_ID (1)
+#define SDSP_DOMAIN_ID (2)
+#define CDSP_DOMAIN_ID (3)
+#define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/
+#define FASTRPC_MAX_SESSIONS 14
+#define FASTRPC_MAX_VMIDS 16
+#define FASTRPC_ALIGN 128
+#define FASTRPC_MAX_FDLIST 16
+#define FASTRPC_MAX_CRCLIST 64
+#define FASTRPC_PHYS(p) ((p) & 0xffffffff)
+#define FASTRPC_CTX_MAX (256)
+#define FASTRPC_INIT_HANDLE 1
+#define FASTRPC_DSP_UTILITIES_HANDLE 2
+#define FASTRPC_CTXID_MASK (0xFF0)
+#define INIT_FILELEN_MAX (2 * 1024 * 1024)
+#define INIT_FILE_NAMELEN_MAX (128)
+#define FASTRPC_DEVICE_NAME "fastrpc"
+
+/* Add memory to static PD pool, protection thru XPU */
+#define ADSP_MMAP_HEAP_ADDR 4
+/* MAP static DMA buffer on DSP User PD */
+#define ADSP_MMAP_DMA_BUFFER 6
+/* Add memory to static PD pool protection thru hypervisor */
+#define ADSP_MMAP_REMOTE_HEAP_ADDR 8
+/* Add memory to userPD pool, for user heap */
+#define ADSP_MMAP_ADD_PAGES 0x1000
+/* Add memory to userPD pool, for LLC heap */
+#define ADSP_MMAP_ADD_PAGES_LLC 0x3000,
+
+#define DSP_UNSUPPORTED_API (0x80000414)
+/* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */
+#define FASTRPC_MAX_DSP_ATTRIBUTES (256)
+#define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES)
+
+/* Retrives number of input buffers from the scalars parameter */
+#define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
+
+/* Retrives number of output buffers from the scalars parameter */
+#define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff)
+
+/* Retrives number of input handles from the scalars parameter */
+#define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f)
+
+/* Retrives number of output handles from the scalars parameter */
+#define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f)
+
+#define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \
+ REMOTE_SCALARS_OUTBUFS(sc) + \
+ REMOTE_SCALARS_INHANDLES(sc)+ \
+ REMOTE_SCALARS_OUTHANDLES(sc))
+#define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \
+ (((attr & 0x07) << 29) | \
+ ((method & 0x1f) << 24) | \
+ ((in & 0xff) << 16) | \
+ ((out & 0xff) << 8) | \
+ ((oin & 0x0f) << 4) | \
+ (oout & 0x0f))
+
+#define FASTRPC_SCALARS(method, in, out) \
+ FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
+
+#define FASTRPC_CREATE_PROCESS_NARGS 6
+#define FASTRPC_CREATE_STATIC_PROCESS_NARGS 3
+/* Remote Method id table */
+#define FASTRPC_RMID_INIT_ATTACH 0
+#define FASTRPC_RMID_INIT_RELEASE 1
+#define FASTRPC_RMID_INIT_MMAP 4
+#define FASTRPC_RMID_INIT_MUNMAP 5
+#define FASTRPC_RMID_INIT_CREATE 6
+#define FASTRPC_RMID_INIT_CREATE_ATTR 7
+#define FASTRPC_RMID_INIT_CREATE_STATIC 8
+#define FASTRPC_RMID_INIT_MEM_MAP 10
+#define FASTRPC_RMID_INIT_MEM_UNMAP 11
+
+/* Protection Domain(PD) ids */
+#define ROOT_PD (0)
+#define USER_PD (1)
+#define SENSORS_PD (2)
+
+#define miscdev_to_fdevice(d) container_of(d, struct fastrpc_device, miscdev)
+
+static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp",
+ "sdsp", "cdsp"};
+struct fastrpc_phy_page {
+ u64 addr; /* physical address */
+ u64 size; /* size of contiguous region */
+};
+
+struct fastrpc_invoke_buf {
+ u32 num; /* number of contiguous regions */
+ u32 pgidx; /* index to start of contiguous region */
+};
+
+struct fastrpc_remote_dmahandle {
+ s32 fd; /* dma handle fd */
+ u32 offset; /* dma handle offset */
+ u32 len; /* dma handle length */
+};
+
+struct fastrpc_remote_buf {
+ u64 pv; /* buffer pointer */
+ u64 len; /* length of buffer */
+};
+
+union fastrpc_remote_arg {
+ struct fastrpc_remote_buf buf;
+ struct fastrpc_remote_dmahandle dma;
+};
+
+struct fastrpc_mmap_rsp_msg {
+ u64 vaddr;
+};
+
+struct fastrpc_mmap_req_msg {
+ s32 pgid;
+ u32 flags;
+ u64 vaddr;
+ s32 num;
+};
+
+struct fastrpc_mem_map_req_msg {
+ s32 pgid;
+ s32 fd;
+ s32 offset;
+ u32 flags;
+ u64 vaddrin;
+ s32 num;
+ s32 data_len;
+};
+
+struct fastrpc_munmap_req_msg {
+ s32 pgid;
+ u64 vaddr;
+ u64 size;
+};
+
+struct fastrpc_mem_unmap_req_msg {
+ s32 pgid;
+ s32 fd;
+ u64 vaddrin;
+ u64 len;
+};
+
+struct fastrpc_msg {
+ int pid; /* process group id */
+ int tid; /* thread id */
+ u64 ctx; /* invoke caller context */
+ u32 handle; /* handle to invoke */
+ u32 sc; /* scalars structure describing the data */
+ u64 addr; /* physical address */
+ u64 size; /* size of contiguous region */
+};
+
+struct fastrpc_invoke_rsp {
+ u64 ctx; /* invoke caller context */
+ int retval; /* invoke return value */
+};
+
+struct fastrpc_buf_overlap {
+ u64 start;
+ u64 end;
+ int raix;
+ u64 mstart;
+ u64 mend;
+ u64 offset;
+};
+
+struct fastrpc_buf {
+ struct fastrpc_user *fl;
+ struct dma_buf *dmabuf;
+ struct device *dev;
+ void *virt;
+ u64 phys;
+ u64 size;
+ /* Lock for dma buf attachments */
+ struct mutex lock;
+ struct list_head attachments;
+ /* mmap support */
+ struct list_head node; /* list of user requested mmaps */
+ uintptr_t raddr;
+};
+
+struct fastrpc_dma_buf_attachment {
+ struct device *dev;
+ struct sg_table sgt;
+ struct list_head node;
+};
+
+struct fastrpc_map {
+ struct list_head node;
+ struct fastrpc_user *fl;
+ int fd;
+ struct dma_buf *buf;
+ struct sg_table *table;
+ struct dma_buf_attachment *attach;
+ u64 phys;
+ u64 size;
+ void *va;
+ u64 len;
+ u64 raddr;
+ u32 attr;
+ struct kref refcount;
+};
+
+struct fastrpc_invoke_ctx {
+ int nscalars;
+ int nbufs;
+ int retval;
+ int pid;
+ int tgid;
+ u32 sc;
+ u32 *crc;
+ u64 ctxid;
+ u64 msg_sz;
+ struct kref refcount;
+ struct list_head node; /* list of ctxs */
+ struct completion work;
+ struct work_struct put_work;
+ struct fastrpc_msg msg;
+ struct fastrpc_user *fl;
+ union fastrpc_remote_arg *rpra;
+ struct fastrpc_map **maps;
+ struct fastrpc_buf *buf;
+ struct fastrpc_invoke_args *args;
+ struct fastrpc_buf_overlap *olaps;
+ struct fastrpc_channel_ctx *cctx;
+};
+
+struct fastrpc_session_ctx {
+ struct device *dev;
+ int sid;
+ bool used;
+ bool valid;
+};
+
+struct fastrpc_channel_ctx {
+ int domain_id;
+ int sesscount;
+ int vmcount;
+ u64 perms;
+ struct qcom_scm_vmperm vmperms[FASTRPC_MAX_VMIDS];
+ struct rpmsg_device *rpdev;
+ struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS];
+ spinlock_t lock;
+ struct idr ctx_idr;
+ struct list_head users;
+ struct kref refcount;
+ /* Flag if dsp attributes are cached */
+ bool valid_attributes;
+ u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES];
+ struct fastrpc_device *secure_fdevice;
+ struct fastrpc_device *fdevice;
+ struct fastrpc_buf *remote_heap;
+ struct list_head invoke_interrupted_mmaps;
+ bool secure;
+ bool unsigned_support;
+ u64 dma_mask;
+};
+
+struct fastrpc_device {
+ struct fastrpc_channel_ctx *cctx;
+ struct miscdevice miscdev;
+ bool secure;
+};
+
+struct fastrpc_user {
+ struct list_head user;
+ struct list_head maps;
+ struct list_head pending;
+ struct list_head mmaps;
+
+ struct fastrpc_channel_ctx *cctx;
+ struct fastrpc_session_ctx *sctx;
+ struct fastrpc_buf *init_mem;
+
+ int tgid;
+ int pd;
+ bool is_secure_dev;
+ /* Lock for lists */
+ spinlock_t lock;
+ /* lock for allocations */
+ struct mutex mutex;
+};
+
+static void fastrpc_free_map(struct kref *ref)
+{
+ struct fastrpc_map *map;
+
+ map = container_of(ref, struct fastrpc_map, refcount);
+
+ if (map->table) {
+ if (map->attr & FASTRPC_ATTR_SECUREMAP) {
+ struct qcom_scm_vmperm perm;
+ int vmid = map->fl->cctx->vmperms[0].vmid;
+ u64 src_perms = BIT(QCOM_SCM_VMID_HLOS) | BIT(vmid);
+ int err = 0;
+
+ perm.vmid = QCOM_SCM_VMID_HLOS;
+ perm.perm = QCOM_SCM_PERM_RWX;
+ err = qcom_scm_assign_mem(map->phys, map->size,
+ &src_perms, &perm, 1);
+ if (err) {
+ dev_err(map->fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
+ map->phys, map->size, err);
+ return;
+ }
+ }
+ dma_buf_unmap_attachment_unlocked(map->attach, map->table,
+ DMA_BIDIRECTIONAL);
+ dma_buf_detach(map->buf, map->attach);
+ dma_buf_put(map->buf);
+ }
+
+ if (map->fl) {
+ spin_lock(&map->fl->lock);
+ list_del(&map->node);
+ spin_unlock(&map->fl->lock);
+ map->fl = NULL;
+ }
+
+ kfree(map);
+}
+
+static void fastrpc_map_put(struct fastrpc_map *map)
+{
+ if (map)
+ kref_put(&map->refcount, fastrpc_free_map);
+}
+
+static int fastrpc_map_get(struct fastrpc_map *map)
+{
+ if (!map)
+ return -ENOENT;
+
+ return kref_get_unless_zero(&map->refcount) ? 0 : -ENOENT;
+}
+
+
+static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd,
+ struct fastrpc_map **ppmap, bool take_ref)
+{
+ struct fastrpc_session_ctx *sess = fl->sctx;
+ struct fastrpc_map *map = NULL;
+ int ret = -ENOENT;
+
+ spin_lock(&fl->lock);
+ list_for_each_entry(map, &fl->maps, node) {
+ if (map->fd != fd)
+ continue;
+
+ if (take_ref) {
+ ret = fastrpc_map_get(map);
+ if (ret) {
+ dev_dbg(sess->dev, "%s: Failed to get map fd=%d ret=%d\n",
+ __func__, fd, ret);
+ break;
+ }
+ }
+
+ *ppmap = map;
+ ret = 0;
+ break;
+ }
+ spin_unlock(&fl->lock);
+
+ return ret;
+}
+
+static void fastrpc_buf_free(struct fastrpc_buf *buf)
+{
+ dma_free_coherent(buf->dev, buf->size, buf->virt,
+ FASTRPC_PHYS(buf->phys));
+ kfree(buf);
+}
+
+static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
+ u64 size, struct fastrpc_buf **obuf)
+{
+ struct fastrpc_buf *buf;
+
+ buf = kzalloc(sizeof(*buf), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&buf->attachments);
+ INIT_LIST_HEAD(&buf->node);
+ mutex_init(&buf->lock);
+
+ buf->fl = fl;
+ buf->virt = NULL;
+ buf->phys = 0;
+ buf->size = size;
+ buf->dev = dev;
+ buf->raddr = 0;
+
+ buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys,
+ GFP_KERNEL);
+ if (!buf->virt) {
+ mutex_destroy(&buf->lock);
+ kfree(buf);
+ return -ENOMEM;
+ }
+
+ *obuf = buf;
+
+ return 0;
+}
+
+static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
+ u64 size, struct fastrpc_buf **obuf)
+{
+ int ret;
+ struct fastrpc_buf *buf;
+
+ ret = __fastrpc_buf_alloc(fl, dev, size, obuf);
+ if (ret)
+ return ret;
+
+ buf = *obuf;
+
+ if (fl->sctx && fl->sctx->sid)
+ buf->phys += ((u64)fl->sctx->sid << 32);
+
+ return 0;
+}
+
+static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev,
+ u64 size, struct fastrpc_buf **obuf)
+{
+ struct device *rdev = &fl->cctx->rpdev->dev;
+
+ return __fastrpc_buf_alloc(fl, rdev, size, obuf);
+}
+
+static void fastrpc_channel_ctx_free(struct kref *ref)
+{
+ struct fastrpc_channel_ctx *cctx;
+
+ cctx = container_of(ref, struct fastrpc_channel_ctx, refcount);
+
+ kfree(cctx);
+}
+
+static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx)
+{
+ kref_get(&cctx->refcount);
+}
+
+static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx)
+{
+ kref_put(&cctx->refcount, fastrpc_channel_ctx_free);
+}
+
+static void fastrpc_context_free(struct kref *ref)
+{
+ struct fastrpc_invoke_ctx *ctx;
+ struct fastrpc_channel_ctx *cctx;
+ unsigned long flags;
+ int i;
+
+ ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount);
+ cctx = ctx->cctx;
+
+ for (i = 0; i < ctx->nbufs; i++)
+ fastrpc_map_put(ctx->maps[i]);
+
+ if (ctx->buf)
+ fastrpc_buf_free(ctx->buf);
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ kfree(ctx->maps);
+ kfree(ctx->olaps);
+ kfree(ctx);
+
+ fastrpc_channel_ctx_put(cctx);
+}
+
+static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
+{
+ kref_get(&ctx->refcount);
+}
+
+static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
+{
+ kref_put(&ctx->refcount, fastrpc_context_free);
+}
+
+static void fastrpc_context_put_wq(struct work_struct *work)
+{
+ struct fastrpc_invoke_ctx *ctx =
+ container_of(work, struct fastrpc_invoke_ctx, put_work);
+
+ fastrpc_context_put(ctx);
+}
+
+#define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1)
+static int olaps_cmp(const void *a, const void *b)
+{
+ struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a;
+ struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b;
+ /* sort with lowest starting buffer first */
+ int st = CMP(pa->start, pb->start);
+ /* sort with highest ending buffer first */
+ int ed = CMP(pb->end, pa->end);
+
+ return st == 0 ? ed : st;
+}
+
+static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx)
+{
+ u64 max_end = 0;
+ int i;
+
+ for (i = 0; i < ctx->nbufs; ++i) {
+ ctx->olaps[i].start = ctx->args[i].ptr;
+ ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length;
+ ctx->olaps[i].raix = i;
+ }
+
+ sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL);
+
+ for (i = 0; i < ctx->nbufs; ++i) {
+ /* Falling inside previous range */
+ if (ctx->olaps[i].start < max_end) {
+ ctx->olaps[i].mstart = max_end;
+ ctx->olaps[i].mend = ctx->olaps[i].end;
+ ctx->olaps[i].offset = max_end - ctx->olaps[i].start;
+
+ if (ctx->olaps[i].end > max_end) {
+ max_end = ctx->olaps[i].end;
+ } else {
+ ctx->olaps[i].mend = 0;
+ ctx->olaps[i].mstart = 0;
+ }
+
+ } else {
+ ctx->olaps[i].mend = ctx->olaps[i].end;
+ ctx->olaps[i].mstart = ctx->olaps[i].start;
+ ctx->olaps[i].offset = 0;
+ max_end = ctx->olaps[i].end;
+ }
+ }
+}
+
+static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
+ struct fastrpc_user *user, u32 kernel, u32 sc,
+ struct fastrpc_invoke_args *args)
+{
+ struct fastrpc_channel_ctx *cctx = user->cctx;
+ struct fastrpc_invoke_ctx *ctx = NULL;
+ unsigned long flags;
+ int ret;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&ctx->node);
+ ctx->fl = user;
+ ctx->nscalars = REMOTE_SCALARS_LENGTH(sc);
+ ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) +
+ REMOTE_SCALARS_OUTBUFS(sc);
+
+ if (ctx->nscalars) {
+ ctx->maps = kcalloc(ctx->nscalars,
+ sizeof(*ctx->maps), GFP_KERNEL);
+ if (!ctx->maps) {
+ kfree(ctx);
+ return ERR_PTR(-ENOMEM);
+ }
+ ctx->olaps = kcalloc(ctx->nscalars,
+ sizeof(*ctx->olaps), GFP_KERNEL);
+ if (!ctx->olaps) {
+ kfree(ctx->maps);
+ kfree(ctx);
+ return ERR_PTR(-ENOMEM);
+ }
+ ctx->args = args;
+ fastrpc_get_buff_overlaps(ctx);
+ }
+
+ /* Released in fastrpc_context_put() */
+ fastrpc_channel_ctx_get(cctx);
+
+ ctx->sc = sc;
+ ctx->retval = -1;
+ ctx->pid = current->pid;
+ ctx->tgid = user->tgid;
+ ctx->cctx = cctx;
+ init_completion(&ctx->work);
+ INIT_WORK(&ctx->put_work, fastrpc_context_put_wq);
+
+ spin_lock(&user->lock);
+ list_add_tail(&ctx->node, &user->pending);
+ spin_unlock(&user->lock);
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1,
+ FASTRPC_CTX_MAX, GFP_ATOMIC);
+ if (ret < 0) {
+ spin_unlock_irqrestore(&cctx->lock, flags);
+ goto err_idr;
+ }
+ ctx->ctxid = ret << 4;
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ kref_init(&ctx->refcount);
+
+ return ctx;
+err_idr:
+ spin_lock(&user->lock);
+ list_del(&ctx->node);
+ spin_unlock(&user->lock);
+ fastrpc_channel_ctx_put(cctx);
+ kfree(ctx->maps);
+ kfree(ctx->olaps);
+ kfree(ctx);
+
+ return ERR_PTR(ret);
+}
+
+static struct sg_table *
+fastrpc_map_dma_buf(struct dma_buf_attachment *attachment,
+ enum dma_data_direction dir)
+{
+ struct fastrpc_dma_buf_attachment *a = attachment->priv;
+ struct sg_table *table;
+ int ret;
+
+ table = &a->sgt;
+
+ ret = dma_map_sgtable(attachment->dev, table, dir, 0);
+ if (ret)
+ table = ERR_PTR(ret);
+ return table;
+}
+
+static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach,
+ struct sg_table *table,
+ enum dma_data_direction dir)
+{
+ dma_unmap_sgtable(attach->dev, table, dir, 0);
+}
+
+static void fastrpc_release(struct dma_buf *dmabuf)
+{
+ struct fastrpc_buf *buffer = dmabuf->priv;
+
+ fastrpc_buf_free(buffer);
+}
+
+static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf,
+ struct dma_buf_attachment *attachment)
+{
+ struct fastrpc_dma_buf_attachment *a;
+ struct fastrpc_buf *buffer = dmabuf->priv;
+ int ret;
+
+ a = kzalloc(sizeof(*a), GFP_KERNEL);
+ if (!a)
+ return -ENOMEM;
+
+ ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt,
+ FASTRPC_PHYS(buffer->phys), buffer->size);
+ if (ret < 0) {
+ dev_err(buffer->dev, "failed to get scatterlist from DMA API\n");
+ kfree(a);
+ return -EINVAL;
+ }
+
+ a->dev = attachment->dev;
+ INIT_LIST_HEAD(&a->node);
+ attachment->priv = a;
+
+ mutex_lock(&buffer->lock);
+ list_add(&a->node, &buffer->attachments);
+ mutex_unlock(&buffer->lock);
+
+ return 0;
+}
+
+static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
+ struct dma_buf_attachment *attachment)
+{
+ struct fastrpc_dma_buf_attachment *a = attachment->priv;
+ struct fastrpc_buf *buffer = dmabuf->priv;
+
+ mutex_lock(&buffer->lock);
+ list_del(&a->node);
+ mutex_unlock(&buffer->lock);
+ sg_free_table(&a->sgt);
+ kfree(a);
+}
+
+static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
+{
+ struct fastrpc_buf *buf = dmabuf->priv;
+
+ iosys_map_set_vaddr(map, buf->virt);
+
+ return 0;
+}
+
+static int fastrpc_mmap(struct dma_buf *dmabuf,
+ struct vm_area_struct *vma)
+{
+ struct fastrpc_buf *buf = dmabuf->priv;
+ size_t size = vma->vm_end - vma->vm_start;
+
+ dma_resv_assert_held(dmabuf->resv);
+
+ return dma_mmap_coherent(buf->dev, vma, buf->virt,
+ FASTRPC_PHYS(buf->phys), size);
+}
+
+static const struct dma_buf_ops fastrpc_dma_buf_ops = {
+ .attach = fastrpc_dma_buf_attach,
+ .detach = fastrpc_dma_buf_detatch,
+ .map_dma_buf = fastrpc_map_dma_buf,
+ .unmap_dma_buf = fastrpc_unmap_dma_buf,
+ .mmap = fastrpc_mmap,
+ .vmap = fastrpc_vmap,
+ .release = fastrpc_release,
+};
+
+static int fastrpc_map_create(struct fastrpc_user *fl, int fd,
+ u64 len, u32 attr, struct fastrpc_map **ppmap)
+{
+ struct fastrpc_session_ctx *sess = fl->sctx;
+ struct fastrpc_map *map = NULL;
+ struct sg_table *table;
+ int err = 0;
+
+ if (!fastrpc_map_lookup(fl, fd, ppmap, true))
+ return 0;
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&map->node);
+ kref_init(&map->refcount);
+
+ map->fl = fl;
+ map->fd = fd;
+ map->buf = dma_buf_get(fd);
+ if (IS_ERR(map->buf)) {
+ err = PTR_ERR(map->buf);
+ goto get_err;
+ }
+
+ map->attach = dma_buf_attach(map->buf, sess->dev);
+ if (IS_ERR(map->attach)) {
+ dev_err(sess->dev, "Failed to attach dmabuf\n");
+ err = PTR_ERR(map->attach);
+ goto attach_err;
+ }
+
+ table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL);
+ if (IS_ERR(table)) {
+ err = PTR_ERR(table);
+ goto map_err;
+ }
+ map->table = table;
+
+ if (attr & FASTRPC_ATTR_SECUREMAP) {
+ map->phys = sg_phys(map->table->sgl);
+ } else {
+ map->phys = sg_dma_address(map->table->sgl);
+ map->phys += ((u64)fl->sctx->sid << 32);
+ }
+ map->size = len;
+ map->va = sg_virt(map->table->sgl);
+ map->len = len;
+
+ if (attr & FASTRPC_ATTR_SECUREMAP) {
+ /*
+ * If subsystem VMIDs are defined in DTSI, then do
+ * hyp_assign from HLOS to those VM(s)
+ */
+ u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
+ struct qcom_scm_vmperm dst_perms[2] = {0};
+
+ dst_perms[0].vmid = QCOM_SCM_VMID_HLOS;
+ dst_perms[0].perm = QCOM_SCM_PERM_RW;
+ dst_perms[1].vmid = fl->cctx->vmperms[0].vmid;
+ dst_perms[1].perm = QCOM_SCM_PERM_RWX;
+ map->attr = attr;
+ err = qcom_scm_assign_mem(map->phys, (u64)map->size, &src_perms, dst_perms, 2);
+ if (err) {
+ dev_err(sess->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d",
+ map->phys, map->size, err);
+ goto map_err;
+ }
+ }
+ spin_lock(&fl->lock);
+ list_add_tail(&map->node, &fl->maps);
+ spin_unlock(&fl->lock);
+ *ppmap = map;
+
+ return 0;
+
+map_err:
+ dma_buf_detach(map->buf, map->attach);
+attach_err:
+ dma_buf_put(map->buf);
+get_err:
+ fastrpc_map_put(map);
+
+ return err;
+}
+
+/*
+ * Fastrpc payload buffer with metadata looks like:
+ *
+ * >>>>>> START of METADATA <<<<<<<<<
+ * +---------------------------------+
+ * | Arguments |
+ * | type:(union fastrpc_remote_arg)|
+ * | (0 - N) |
+ * +---------------------------------+
+ * | Invoke Buffer list |
+ * | type:(struct fastrpc_invoke_buf)|
+ * | (0 - N) |
+ * +---------------------------------+
+ * | Page info list |
+ * | type:(struct fastrpc_phy_page) |
+ * | (0 - N) |
+ * +---------------------------------+
+ * | Optional info |
+ * |(can be specific to SoC/Firmware)|
+ * +---------------------------------+
+ * >>>>>>>> END of METADATA <<<<<<<<<
+ * +---------------------------------+
+ * | Inline ARGS |
+ * | (0-N) |
+ * +---------------------------------+
+ */
+
+static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx)
+{
+ int size = 0;
+
+ size = (sizeof(struct fastrpc_remote_buf) +
+ sizeof(struct fastrpc_invoke_buf) +
+ sizeof(struct fastrpc_phy_page)) * ctx->nscalars +
+ sizeof(u64) * FASTRPC_MAX_FDLIST +
+ sizeof(u32) * FASTRPC_MAX_CRCLIST;
+
+ return size;
+}
+
+static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen)
+{
+ u64 size = 0;
+ int oix;
+
+ size = ALIGN(metalen, FASTRPC_ALIGN);
+ for (oix = 0; oix < ctx->nbufs; oix++) {
+ int i = ctx->olaps[oix].raix;
+
+ if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) {
+
+ if (ctx->olaps[oix].offset == 0)
+ size = ALIGN(size, FASTRPC_ALIGN);
+
+ size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart);
+ }
+ }
+
+ return size;
+}
+
+static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx)
+{
+ struct device *dev = ctx->fl->sctx->dev;
+ int i, err;
+
+ for (i = 0; i < ctx->nscalars; ++i) {
+
+ if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 ||
+ ctx->args[i].length == 0)
+ continue;
+
+ err = fastrpc_map_create(ctx->fl, ctx->args[i].fd,
+ ctx->args[i].length, ctx->args[i].attr, &ctx->maps[i]);
+ if (err) {
+ dev_err(dev, "Error Creating map %d\n", err);
+ return -EINVAL;
+ }
+
+ }
+ return 0;
+}
+
+static struct fastrpc_invoke_buf *fastrpc_invoke_buf_start(union fastrpc_remote_arg *pra, int len)
+{
+ return (struct fastrpc_invoke_buf *)(&pra[len]);
+}
+
+static struct fastrpc_phy_page *fastrpc_phy_page_start(struct fastrpc_invoke_buf *buf, int len)
+{
+ return (struct fastrpc_phy_page *)(&buf[len]);
+}
+
+static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
+{
+ struct device *dev = ctx->fl->sctx->dev;
+ union fastrpc_remote_arg *rpra;
+ struct fastrpc_invoke_buf *list;
+ struct fastrpc_phy_page *pages;
+ int inbufs, i, oix, err = 0;
+ u64 len, rlen, pkt_size;
+ u64 pg_start, pg_end;
+ uintptr_t args;
+ int metalen;
+
+ inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
+ metalen = fastrpc_get_meta_size(ctx);
+ pkt_size = fastrpc_get_payload_size(ctx, metalen);
+
+ err = fastrpc_create_maps(ctx);
+ if (err)
+ return err;
+
+ ctx->msg_sz = pkt_size;
+
+ err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
+ if (err)
+ return err;
+
+ memset(ctx->buf->virt, 0, pkt_size);
+ rpra = ctx->buf->virt;
+ list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
+ pages = fastrpc_phy_page_start(list, ctx->nscalars);
+ args = (uintptr_t)ctx->buf->virt + metalen;
+ rlen = pkt_size - metalen;
+ ctx->rpra = rpra;
+
+ for (oix = 0; oix < ctx->nbufs; ++oix) {
+ int mlen;
+
+ i = ctx->olaps[oix].raix;
+ len = ctx->args[i].length;
+
+ rpra[i].buf.pv = 0;
+ rpra[i].buf.len = len;
+ list[i].num = len ? 1 : 0;
+ list[i].pgidx = i;
+
+ if (!len)
+ continue;
+
+ if (ctx->maps[i]) {
+ struct vm_area_struct *vma = NULL;
+
+ rpra[i].buf.pv = (u64) ctx->args[i].ptr;
+ pages[i].addr = ctx->maps[i]->phys;
+
+ mmap_read_lock(current->mm);
+ vma = find_vma(current->mm, ctx->args[i].ptr);
+ if (vma)
+ pages[i].addr += ctx->args[i].ptr -
+ vma->vm_start;
+ mmap_read_unlock(current->mm);
+
+ pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT;
+ pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >>
+ PAGE_SHIFT;
+ pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
+
+ } else {
+
+ if (ctx->olaps[oix].offset == 0) {
+ rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
+ args = ALIGN(args, FASTRPC_ALIGN);
+ }
+
+ mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart;
+
+ if (rlen < mlen)
+ goto bail;
+
+ rpra[i].buf.pv = args - ctx->olaps[oix].offset;
+ pages[i].addr = ctx->buf->phys -
+ ctx->olaps[oix].offset +
+ (pkt_size - rlen);
+ pages[i].addr = pages[i].addr & PAGE_MASK;
+
+ pg_start = (args & PAGE_MASK) >> PAGE_SHIFT;
+ pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT;
+ pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
+ args = args + mlen;
+ rlen -= mlen;
+ }
+
+ if (i < inbufs && !ctx->maps[i]) {
+ void *dst = (void *)(uintptr_t)rpra[i].buf.pv;
+ void *src = (void *)(uintptr_t)ctx->args[i].ptr;
+
+ if (!kernel) {
+ if (copy_from_user(dst, (void __user *)src,
+ len)) {
+ err = -EFAULT;
+ goto bail;
+ }
+ } else {
+ memcpy(dst, src, len);
+ }
+ }
+ }
+
+ for (i = ctx->nbufs; i < ctx->nscalars; ++i) {
+ list[i].num = ctx->args[i].length ? 1 : 0;
+ list[i].pgidx = i;
+ if (ctx->maps[i]) {
+ pages[i].addr = ctx->maps[i]->phys;
+ pages[i].size = ctx->maps[i]->size;
+ }
+ rpra[i].dma.fd = ctx->args[i].fd;
+ rpra[i].dma.len = ctx->args[i].length;
+ rpra[i].dma.offset = (u64) ctx->args[i].ptr;
+ }
+
+bail:
+ if (err)
+ dev_err(dev, "Error: get invoke args failed:%d\n", err);
+
+ return err;
+}
+
+static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
+ u32 kernel)
+{
+ union fastrpc_remote_arg *rpra = ctx->rpra;
+ struct fastrpc_user *fl = ctx->fl;
+ struct fastrpc_map *mmap = NULL;
+ struct fastrpc_invoke_buf *list;
+ struct fastrpc_phy_page *pages;
+ u64 *fdlist;
+ int i, inbufs, outbufs, handles;
+
+ inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
+ outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc);
+ handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc);
+ list = fastrpc_invoke_buf_start(rpra, ctx->nscalars);
+ pages = fastrpc_phy_page_start(list, ctx->nscalars);
+ fdlist = (uint64_t *)(pages + inbufs + outbufs + handles);
+
+ for (i = inbufs; i < ctx->nbufs; ++i) {
+ if (!ctx->maps[i]) {
+ void *src = (void *)(uintptr_t)rpra[i].buf.pv;
+ void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
+ u64 len = rpra[i].buf.len;
+
+ if (!kernel) {
+ if (copy_to_user((void __user *)dst, src, len))
+ return -EFAULT;
+ } else {
+ memcpy(dst, src, len);
+ }
+ }
+ }
+
+ /* Clean up fdlist which is updated by DSP */
+ for (i = 0; i < FASTRPC_MAX_FDLIST; i++) {
+ if (!fdlist[i])
+ break;
+ if (!fastrpc_map_lookup(fl, (int)fdlist[i], &mmap, false))
+ fastrpc_map_put(mmap);
+ }
+
+ return 0;
+}
+
+static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
+ struct fastrpc_invoke_ctx *ctx,
+ u32 kernel, uint32_t handle)
+{
+ struct fastrpc_channel_ctx *cctx;
+ struct fastrpc_user *fl = ctx->fl;
+ struct fastrpc_msg *msg = &ctx->msg;
+ int ret;
+
+ cctx = fl->cctx;
+ msg->pid = fl->tgid;
+ msg->tid = current->pid;
+
+ if (kernel)
+ msg->pid = 0;
+
+ msg->ctx = ctx->ctxid | fl->pd;
+ msg->handle = handle;
+ msg->sc = ctx->sc;
+ msg->addr = ctx->buf ? ctx->buf->phys : 0;
+ msg->size = roundup(ctx->msg_sz, PAGE_SIZE);
+ fastrpc_context_get(ctx);
+
+ ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
+
+ if (ret)
+ fastrpc_context_put(ctx);
+
+ return ret;
+
+}
+
+static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel,
+ u32 handle, u32 sc,
+ struct fastrpc_invoke_args *args)
+{
+ struct fastrpc_invoke_ctx *ctx = NULL;
+ struct fastrpc_buf *buf, *b;
+
+ int err = 0;
+
+ if (!fl->sctx)
+ return -EINVAL;
+
+ if (!fl->cctx->rpdev)
+ return -EPIPE;
+
+ if (handle == FASTRPC_INIT_HANDLE && !kernel) {
+ dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle);
+ return -EPERM;
+ }
+
+ ctx = fastrpc_context_alloc(fl, kernel, sc, args);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ err = fastrpc_get_args(kernel, ctx);
+ if (err)
+ goto bail;
+
+ /* make sure that all CPU memory writes are seen by DSP */
+ dma_wmb();
+ /* Send invoke buffer to remote dsp */
+ err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
+ if (err)
+ goto bail;
+
+ if (kernel) {
+ if (!wait_for_completion_timeout(&ctx->work, 10 * HZ))
+ err = -ETIMEDOUT;
+ } else {
+ err = wait_for_completion_interruptible(&ctx->work);
+ }
+
+ if (err)
+ goto bail;
+
+ /* make sure that all memory writes by DSP are seen by CPU */
+ dma_rmb();
+ /* populate all the output buffers with results */
+ err = fastrpc_put_args(ctx, kernel);
+ if (err)
+ goto bail;
+
+ /* Check the response from remote dsp */
+ err = ctx->retval;
+ if (err)
+ goto bail;
+
+bail:
+ if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
+ /* We are done with this compute context */
+ spin_lock(&fl->lock);
+ list_del(&ctx->node);
+ spin_unlock(&fl->lock);
+ fastrpc_context_put(ctx);
+ }
+
+ if (err == -ERESTARTSYS) {
+ list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
+ list_del(&buf->node);
+ list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps);
+ }
+ }
+
+ if (err)
+ dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);
+
+ return err;
+}
+
+static bool is_session_rejected(struct fastrpc_user *fl, bool unsigned_pd_request)
+{
+ /* Check if the device node is non-secure and channel is secure*/
+ if (!fl->is_secure_dev && fl->cctx->secure) {
+ /*
+ * Allow untrusted applications to offload only to Unsigned PD when
+ * channel is configured as secure and block untrusted apps on channel
+ * that does not support unsigned PD offload
+ */
+ if (!fl->cctx->unsigned_support || !unsigned_pd_request) {
+ dev_err(&fl->cctx->rpdev->dev, "Error: Untrusted application trying to offload to signed PD");
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
+ char __user *argp)
+{
+ struct fastrpc_init_create_static init;
+ struct fastrpc_invoke_args *args;
+ struct fastrpc_phy_page pages[1];
+ char *name;
+ int err;
+ struct {
+ int pgid;
+ u32 namelen;
+ u32 pageslen;
+ } inbuf;
+ u32 sc;
+
+ args = kcalloc(FASTRPC_CREATE_STATIC_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
+ if (!args)
+ return -ENOMEM;
+
+ if (copy_from_user(&init, argp, sizeof(init))) {
+ err = -EFAULT;
+ goto err;
+ }
+
+ if (init.namelen > INIT_FILE_NAMELEN_MAX) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ name = kzalloc(init.namelen, GFP_KERNEL);
+ if (!name) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) {
+ err = -EFAULT;
+ goto err_name;
+ }
+
+ if (!fl->cctx->remote_heap) {
+ err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen,
+ &fl->cctx->remote_heap);
+ if (err)
+ goto err_name;
+
+ /* Map if we have any heap VMIDs associated with this ADSP Static Process. */
+ if (fl->cctx->vmcount) {
+ err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
+ (u64)fl->cctx->remote_heap->size,
+ &fl->cctx->perms,
+ fl->cctx->vmperms, fl->cctx->vmcount);
+ if (err) {
+ dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d",
+ fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
+ goto err_map;
+ }
+ }
+ }
+
+ inbuf.pgid = fl->tgid;
+ inbuf.namelen = init.namelen;
+ inbuf.pageslen = 0;
+ fl->pd = USER_PD;
+
+ args[0].ptr = (u64)(uintptr_t)&inbuf;
+ args[0].length = sizeof(inbuf);
+ args[0].fd = -1;
+
+ args[1].ptr = (u64)(uintptr_t)name;
+ args[1].length = inbuf.namelen;
+ args[1].fd = -1;
+
+ pages[0].addr = fl->cctx->remote_heap->phys;
+ pages[0].size = fl->cctx->remote_heap->size;
+
+ args[2].ptr = (u64)(uintptr_t) pages;
+ args[2].length = sizeof(*pages);
+ args[2].fd = -1;
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_STATIC, 3, 0);
+
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
+ sc, args);
+ if (err)
+ goto err_invoke;
+
+ kfree(args);
+
+ return 0;
+err_invoke:
+ if (fl->cctx->vmcount) {
+ u64 src_perms = 0;
+ struct qcom_scm_vmperm dst_perms;
+ u32 i;
+
+ for (i = 0; i < fl->cctx->vmcount; i++)
+ src_perms |= BIT(fl->cctx->vmperms[i].vmid);
+
+ dst_perms.vmid = QCOM_SCM_VMID_HLOS;
+ dst_perms.perm = QCOM_SCM_PERM_RWX;
+ err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
+ (u64)fl->cctx->remote_heap->size,
+ &src_perms, &dst_perms, 1);
+ if (err)
+ dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
+ fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
+ }
+err_map:
+ fastrpc_buf_free(fl->cctx->remote_heap);
+err_name:
+ kfree(name);
+err:
+ kfree(args);
+
+ return err;
+}
+
+static int fastrpc_init_create_process(struct fastrpc_user *fl,
+ char __user *argp)
+{
+ struct fastrpc_init_create init;
+ struct fastrpc_invoke_args *args;
+ struct fastrpc_phy_page pages[1];
+ struct fastrpc_map *map = NULL;
+ struct fastrpc_buf *imem = NULL;
+ int memlen;
+ int err;
+ struct {
+ int pgid;
+ u32 namelen;
+ u32 filelen;
+ u32 pageslen;
+ u32 attrs;
+ u32 siglen;
+ } inbuf;
+ u32 sc;
+ bool unsigned_module = false;
+
+ args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
+ if (!args)
+ return -ENOMEM;
+
+ if (copy_from_user(&init, argp, sizeof(init))) {
+ err = -EFAULT;
+ goto err;
+ }
+
+ if (init.attrs & FASTRPC_MODE_UNSIGNED_MODULE)
+ unsigned_module = true;
+
+ if (is_session_rejected(fl, unsigned_module)) {
+ err = -ECONNREFUSED;
+ goto err;
+ }
+
+ if (init.filelen > INIT_FILELEN_MAX) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ inbuf.pgid = fl->tgid;
+ inbuf.namelen = strlen(current->comm) + 1;
+ inbuf.filelen = init.filelen;
+ inbuf.pageslen = 1;
+ inbuf.attrs = init.attrs;
+ inbuf.siglen = init.siglen;
+ fl->pd = USER_PD;
+
+ if (init.filelen && init.filefd) {
+ err = fastrpc_map_create(fl, init.filefd, init.filelen, 0, &map);
+ if (err)
+ goto err;
+ }
+
+ memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
+ 1024 * 1024);
+ err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
+ &imem);
+ if (err)
+ goto err_alloc;
+
+ fl->init_mem = imem;
+ args[0].ptr = (u64)(uintptr_t)&inbuf;
+ args[0].length = sizeof(inbuf);
+ args[0].fd = -1;
+
+ args[1].ptr = (u64)(uintptr_t)current->comm;
+ args[1].length = inbuf.namelen;
+ args[1].fd = -1;
+
+ args[2].ptr = (u64) init.file;
+ args[2].length = inbuf.filelen;
+ args[2].fd = init.filefd;
+
+ pages[0].addr = imem->phys;
+ pages[0].size = imem->size;
+
+ args[3].ptr = (u64)(uintptr_t) pages;
+ args[3].length = 1 * sizeof(*pages);
+ args[3].fd = -1;
+
+ args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
+ args[4].length = sizeof(inbuf.attrs);
+ args[4].fd = -1;
+
+ args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
+ args[5].length = sizeof(inbuf.siglen);
+ args[5].fd = -1;
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
+ if (init.attrs)
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 4, 0);
+
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
+ sc, args);
+ if (err)
+ goto err_invoke;
+
+ kfree(args);
+
+ return 0;
+
+err_invoke:
+ fl->init_mem = NULL;
+ fastrpc_buf_free(imem);
+err_alloc:
+ fastrpc_map_put(map);
+err:
+ kfree(args);
+
+ return err;
+}
+
+static struct fastrpc_session_ctx *fastrpc_session_alloc(
+ struct fastrpc_channel_ctx *cctx)
+{
+ struct fastrpc_session_ctx *session = NULL;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ for (i = 0; i < cctx->sesscount; i++) {
+ if (!cctx->session[i].used && cctx->session[i].valid) {
+ cctx->session[i].used = true;
+ session = &cctx->session[i];
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ return session;
+}
+
+static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
+ struct fastrpc_session_ctx *session)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ session->used = false;
+ spin_unlock_irqrestore(&cctx->lock, flags);
+}
+
+static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
+{
+ struct fastrpc_invoke_args args[1];
+ int tgid = 0;
+ u32 sc;
+
+ tgid = fl->tgid;
+ args[0].ptr = (u64)(uintptr_t) &tgid;
+ args[0].length = sizeof(tgid);
+ args[0].fd = -1;
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
+
+ return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
+ sc, &args[0]);
+}
+
+static int fastrpc_device_release(struct inode *inode, struct file *file)
+{
+ struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
+ struct fastrpc_channel_ctx *cctx = fl->cctx;
+ struct fastrpc_invoke_ctx *ctx, *n;
+ struct fastrpc_map *map, *m;
+ struct fastrpc_buf *buf, *b;
+ unsigned long flags;
+
+ fastrpc_release_current_dsp_process(fl);
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ list_del(&fl->user);
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ if (fl->init_mem)
+ fastrpc_buf_free(fl->init_mem);
+
+ list_for_each_entry_safe(ctx, n, &fl->pending, node) {
+ list_del(&ctx->node);
+ fastrpc_context_put(ctx);
+ }
+
+ list_for_each_entry_safe(map, m, &fl->maps, node)
+ fastrpc_map_put(map);
+
+ list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
+ list_del(&buf->node);
+ fastrpc_buf_free(buf);
+ }
+
+ fastrpc_session_free(cctx, fl->sctx);
+ fastrpc_channel_ctx_put(cctx);
+
+ mutex_destroy(&fl->mutex);
+ kfree(fl);
+ file->private_data = NULL;
+
+ return 0;
+}
+
+static int fastrpc_device_open(struct inode *inode, struct file *filp)
+{
+ struct fastrpc_channel_ctx *cctx;
+ struct fastrpc_device *fdevice;
+ struct fastrpc_user *fl = NULL;
+ unsigned long flags;
+
+ fdevice = miscdev_to_fdevice(filp->private_data);
+ cctx = fdevice->cctx;
+
+ fl = kzalloc(sizeof(*fl), GFP_KERNEL);
+ if (!fl)
+ return -ENOMEM;
+
+ /* Released in fastrpc_device_release() */
+ fastrpc_channel_ctx_get(cctx);
+
+ filp->private_data = fl;
+ spin_lock_init(&fl->lock);
+ mutex_init(&fl->mutex);
+ INIT_LIST_HEAD(&fl->pending);
+ INIT_LIST_HEAD(&fl->maps);
+ INIT_LIST_HEAD(&fl->mmaps);
+ INIT_LIST_HEAD(&fl->user);
+ fl->tgid = current->tgid;
+ fl->cctx = cctx;
+ fl->is_secure_dev = fdevice->secure;
+
+ fl->sctx = fastrpc_session_alloc(cctx);
+ if (!fl->sctx) {
+ dev_err(&cctx->rpdev->dev, "No session available\n");
+ mutex_destroy(&fl->mutex);
+ kfree(fl);
+
+ return -EBUSY;
+ }
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ list_add_tail(&fl->user, &cctx->users);
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ return 0;
+}
+
+static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_alloc_dma_buf bp;
+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+ struct fastrpc_buf *buf = NULL;
+ int err;
+
+ if (copy_from_user(&bp, argp, sizeof(bp)))
+ return -EFAULT;
+
+ err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
+ if (err)
+ return err;
+ exp_info.ops = &fastrpc_dma_buf_ops;
+ exp_info.size = bp.size;
+ exp_info.flags = O_RDWR;
+ exp_info.priv = buf;
+ buf->dmabuf = dma_buf_export(&exp_info);
+ if (IS_ERR(buf->dmabuf)) {
+ err = PTR_ERR(buf->dmabuf);
+ fastrpc_buf_free(buf);
+ return err;
+ }
+
+ bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
+ if (bp.fd < 0) {
+ dma_buf_put(buf->dmabuf);
+ return -EINVAL;
+ }
+
+ if (copy_to_user(argp, &bp, sizeof(bp))) {
+ /*
+ * The usercopy failed, but we can't do much about it, as
+ * dma_buf_fd() already called fd_install() and made the
+ * file descriptor accessible for the current process. It
+ * might already be closed and dmabuf no longer valid when
+ * we reach this point. Therefore "leak" the fd and rely on
+ * the process exit path to do any required cleanup.
+ */
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
+{
+ struct fastrpc_invoke_args args[1];
+ int tgid = fl->tgid;
+ u32 sc;
+
+ args[0].ptr = (u64)(uintptr_t) &tgid;
+ args[0].length = sizeof(tgid);
+ args[0].fd = -1;
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
+ fl->pd = pd;
+
+ return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
+ sc, &args[0]);
+}
+
+static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_invoke_args *args = NULL;
+ struct fastrpc_invoke inv;
+ u32 nscalars;
+ int err;
+
+ if (copy_from_user(&inv, argp, sizeof(inv)))
+ return -EFAULT;
+
+ /* nscalars is truncated here to max supported value */
+ nscalars = REMOTE_SCALARS_LENGTH(inv.sc);
+ if (nscalars) {
+ args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL);
+ if (!args)
+ return -ENOMEM;
+
+ if (copy_from_user(args, (void __user *)(uintptr_t)inv.args,
+ nscalars * sizeof(*args))) {
+ kfree(args);
+ return -EFAULT;
+ }
+ }
+
+ err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args);
+ kfree(args);
+
+ return err;
+}
+
+static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf,
+ uint32_t dsp_attr_buf_len)
+{
+ struct fastrpc_invoke_args args[2] = { 0 };
+
+ /* Capability filled in userspace */
+ dsp_attr_buf[0] = 0;
+
+ args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len;
+ args[0].length = sizeof(dsp_attr_buf_len);
+ args[0].fd = -1;
+ args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1];
+ args[1].length = dsp_attr_buf_len;
+ args[1].fd = -1;
+ fl->pd = USER_PD;
+
+ return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE,
+ FASTRPC_SCALARS(0, 1, 1), args);
+}
+
+static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap,
+ struct fastrpc_user *fl)
+{
+ struct fastrpc_channel_ctx *cctx = fl->cctx;
+ uint32_t attribute_id = cap->attribute_id;
+ uint32_t *dsp_attributes;
+ unsigned long flags;
+ uint32_t domain = cap->domain;
+ int err;
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ /* check if we already have queried dsp for attributes */
+ if (cctx->valid_attributes) {
+ spin_unlock_irqrestore(&cctx->lock, flags);
+ goto done;
+ }
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL);
+ if (!dsp_attributes)
+ return -ENOMEM;
+
+ err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
+ if (err == DSP_UNSUPPORTED_API) {
+ dev_info(&cctx->rpdev->dev,
+ "Warning: DSP capabilities not supported on domain: %d\n", domain);
+ kfree(dsp_attributes);
+ return -EOPNOTSUPP;
+ } else if (err) {
+ dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err);
+ kfree(dsp_attributes);
+ return err;
+ }
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
+ cctx->valid_attributes = true;
+ spin_unlock_irqrestore(&cctx->lock, flags);
+ kfree(dsp_attributes);
+done:
+ cap->capability = cctx->dsp_attributes[attribute_id];
+ return 0;
+}
+
+static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_ioctl_capability cap = {0};
+ int err = 0;
+
+ if (copy_from_user(&cap, argp, sizeof(cap)))
+ return -EFAULT;
+
+ cap.capability = 0;
+ if (cap.domain >= FASTRPC_DEV_MAX) {
+ dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n",
+ cap.domain, err);
+ return -ECHRNG;
+ }
+
+ /* Fastrpc Capablities does not support modem domain */
+ if (cap.domain == MDSP_DOMAIN_ID) {
+ dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err);
+ return -ECHRNG;
+ }
+
+ if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) {
+ dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n",
+ cap.attribute_id, err);
+ return -EOVERFLOW;
+ }
+
+ err = fastrpc_get_info_from_kernel(&cap, fl);
+ if (err)
+ return err;
+
+ if (copy_to_user(argp, &cap.capability, sizeof(cap.capability)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf)
+{
+ struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
+ struct fastrpc_munmap_req_msg req_msg;
+ struct device *dev = fl->sctx->dev;
+ int err;
+ u32 sc;
+
+ req_msg.pgid = fl->tgid;
+ req_msg.size = buf->size;
+ req_msg.vaddr = buf->raddr;
+
+ args[0].ptr = (u64) (uintptr_t) &req_msg;
+ args[0].length = sizeof(req_msg);
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
+ &args[0]);
+ if (!err) {
+ dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
+ spin_lock(&fl->lock);
+ list_del(&buf->node);
+ spin_unlock(&fl->lock);
+ fastrpc_buf_free(buf);
+ } else {
+ dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
+ }
+
+ return err;
+}
+
+static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_buf *buf = NULL, *iter, *b;
+ struct fastrpc_req_munmap req;
+ struct device *dev = fl->sctx->dev;
+
+ if (copy_from_user(&req, argp, sizeof(req)))
+ return -EFAULT;
+
+ spin_lock(&fl->lock);
+ list_for_each_entry_safe(iter, b, &fl->mmaps, node) {
+ if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) {
+ buf = iter;
+ break;
+ }
+ }
+ spin_unlock(&fl->lock);
+
+ if (!buf) {
+ dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n",
+ req.vaddrout, req.size);
+ return -EINVAL;
+ }
+
+ return fastrpc_req_munmap_impl(fl, buf);
+}
+
+static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } };
+ struct fastrpc_buf *buf = NULL;
+ struct fastrpc_mmap_req_msg req_msg;
+ struct fastrpc_mmap_rsp_msg rsp_msg;
+ struct fastrpc_phy_page pages;
+ struct fastrpc_req_mmap req;
+ struct device *dev = fl->sctx->dev;
+ int err;
+ u32 sc;
+
+ if (copy_from_user(&req, argp, sizeof(req)))
+ return -EFAULT;
+
+ if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) {
+ dev_err(dev, "flag not supported 0x%x\n", req.flags);
+
+ return -EINVAL;
+ }
+
+ if (req.vaddrin) {
+ dev_err(dev, "adding user allocated pages is not supported\n");
+ return -EINVAL;
+ }
+
+ if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR)
+ err = fastrpc_remote_heap_alloc(fl, dev, req.size, &buf);
+ else
+ err = fastrpc_buf_alloc(fl, dev, req.size, &buf);
+
+ if (err) {
+ dev_err(dev, "failed to allocate buffer\n");
+ return err;
+ }
+
+ req_msg.pgid = fl->tgid;
+ req_msg.flags = req.flags;
+ req_msg.vaddr = req.vaddrin;
+ req_msg.num = sizeof(pages);
+
+ args[0].ptr = (u64) (uintptr_t) &req_msg;
+ args[0].length = sizeof(req_msg);
+
+ pages.addr = buf->phys;
+ pages.size = buf->size;
+
+ args[1].ptr = (u64) (uintptr_t) &pages;
+ args[1].length = sizeof(pages);
+
+ args[2].ptr = (u64) (uintptr_t) &rsp_msg;
+ args[2].length = sizeof(rsp_msg);
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1);
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
+ &args[0]);
+ if (err) {
+ dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size);
+ goto err_invoke;
+ }
+
+ /* update the buffer to be able to deallocate the memory on the DSP */
+ buf->raddr = (uintptr_t) rsp_msg.vaddr;
+
+ /* let the client know the address to use */
+ req.vaddrout = rsp_msg.vaddr;
+
+ /* Add memory to static PD pool, protection thru hypervisor */
+ if (req.flags == ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) {
+ err = qcom_scm_assign_mem(buf->phys, (u64)buf->size,
+ &fl->cctx->perms, fl->cctx->vmperms, fl->cctx->vmcount);
+ if (err) {
+ dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
+ buf->phys, buf->size, err);
+ goto err_assign;
+ }
+ }
+
+ spin_lock(&fl->lock);
+ list_add_tail(&buf->node, &fl->mmaps);
+ spin_unlock(&fl->lock);
+
+ if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
+ err = -EFAULT;
+ goto err_assign;
+ }
+
+ dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n",
+ buf->raddr, buf->size);
+
+ return 0;
+
+err_assign:
+ fastrpc_req_munmap_impl(fl, buf);
+err_invoke:
+ fastrpc_buf_free(buf);
+
+ return err;
+}
+
+static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_mem_unmap *req)
+{
+ struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
+ struct fastrpc_map *map = NULL, *iter, *m;
+ struct fastrpc_mem_unmap_req_msg req_msg = { 0 };
+ int err = 0;
+ u32 sc;
+ struct device *dev = fl->sctx->dev;
+
+ spin_lock(&fl->lock);
+ list_for_each_entry_safe(iter, m, &fl->maps, node) {
+ if ((req->fd < 0 || iter->fd == req->fd) && (iter->raddr == req->vaddr)) {
+ map = iter;
+ break;
+ }
+ }
+
+ spin_unlock(&fl->lock);
+
+ if (!map) {
+ dev_err(dev, "map not in list\n");
+ return -EINVAL;
+ }
+
+ req_msg.pgid = fl->tgid;
+ req_msg.len = map->len;
+ req_msg.vaddrin = map->raddr;
+ req_msg.fd = map->fd;
+
+ args[0].ptr = (u64) (uintptr_t) &req_msg;
+ args[0].length = sizeof(req_msg);
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_UNMAP, 1, 0);
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
+ &args[0]);
+ if (err) {
+ dev_err(dev, "unmmap\tpt fd = %d, 0x%09llx error\n", map->fd, map->raddr);
+ return err;
+ }
+ fastrpc_map_put(map);
+
+ return 0;
+}
+
+static int fastrpc_req_mem_unmap(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_mem_unmap req;
+
+ if (copy_from_user(&req, argp, sizeof(req)))
+ return -EFAULT;
+
+ return fastrpc_req_mem_unmap_impl(fl, &req);
+}
+
+static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp)
+{
+ struct fastrpc_invoke_args args[4] = { [0 ... 3] = { 0 } };
+ struct fastrpc_mem_map_req_msg req_msg = { 0 };
+ struct fastrpc_mmap_rsp_msg rsp_msg = { 0 };
+ struct fastrpc_mem_unmap req_unmap = { 0 };
+ struct fastrpc_phy_page pages = { 0 };
+ struct fastrpc_mem_map req;
+ struct device *dev = fl->sctx->dev;
+ struct fastrpc_map *map = NULL;
+ int err;
+ u32 sc;
+
+ if (copy_from_user(&req, argp, sizeof(req)))
+ return -EFAULT;
+
+ /* create SMMU mapping */
+ err = fastrpc_map_create(fl, req.fd, req.length, 0, &map);
+ if (err) {
+ dev_err(dev, "failed to map buffer, fd = %d\n", req.fd);
+ return err;
+ }
+
+ req_msg.pgid = fl->tgid;
+ req_msg.fd = req.fd;
+ req_msg.offset = req.offset;
+ req_msg.vaddrin = req.vaddrin;
+ map->va = (void *) (uintptr_t) req.vaddrin;
+ req_msg.flags = req.flags;
+ req_msg.num = sizeof(pages);
+ req_msg.data_len = 0;
+
+ args[0].ptr = (u64) (uintptr_t) &req_msg;
+ args[0].length = sizeof(req_msg);
+
+ pages.addr = map->phys;
+ pages.size = map->size;
+
+ args[1].ptr = (u64) (uintptr_t) &pages;
+ args[1].length = sizeof(pages);
+
+ args[2].ptr = (u64) (uintptr_t) &pages;
+ args[2].length = 0;
+
+ args[3].ptr = (u64) (uintptr_t) &rsp_msg;
+ args[3].length = sizeof(rsp_msg);
+
+ sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MEM_MAP, 3, 1);
+ err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc, &args[0]);
+ if (err) {
+ dev_err(dev, "mem mmap error, fd %d, vaddr %llx, size %lld\n",
+ req.fd, req.vaddrin, map->size);
+ goto err_invoke;
+ }
+
+ /* update the buffer to be able to deallocate the memory on the DSP */
+ map->raddr = rsp_msg.vaddr;
+
+ /* let the client know the address to use */
+ req.vaddrout = rsp_msg.vaddr;
+
+ if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
+ /* unmap the memory and release the buffer */
+ req_unmap.vaddr = (uintptr_t) rsp_msg.vaddr;
+ req_unmap.length = map->size;
+ fastrpc_req_mem_unmap_impl(fl, &req_unmap);
+ return -EFAULT;
+ }
+
+ return 0;
+
+err_invoke:
+ fastrpc_map_put(map);
+
+ return err;
+}
+
+static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
+ char __user *argp = (char __user *)arg;
+ int err;
+
+ switch (cmd) {
+ case FASTRPC_IOCTL_INVOKE:
+ err = fastrpc_invoke(fl, argp);
+ break;
+ case FASTRPC_IOCTL_INIT_ATTACH:
+ err = fastrpc_init_attach(fl, ROOT_PD);
+ break;
+ case FASTRPC_IOCTL_INIT_ATTACH_SNS:
+ err = fastrpc_init_attach(fl, SENSORS_PD);
+ break;
+ case FASTRPC_IOCTL_INIT_CREATE_STATIC:
+ err = fastrpc_init_create_static_process(fl, argp);
+ break;
+ case FASTRPC_IOCTL_INIT_CREATE:
+ err = fastrpc_init_create_process(fl, argp);
+ break;
+ case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
+ err = fastrpc_dmabuf_alloc(fl, argp);
+ break;
+ case FASTRPC_IOCTL_MMAP:
+ err = fastrpc_req_mmap(fl, argp);
+ break;
+ case FASTRPC_IOCTL_MUNMAP:
+ err = fastrpc_req_munmap(fl, argp);
+ break;
+ case FASTRPC_IOCTL_MEM_MAP:
+ err = fastrpc_req_mem_map(fl, argp);
+ break;
+ case FASTRPC_IOCTL_MEM_UNMAP:
+ err = fastrpc_req_mem_unmap(fl, argp);
+ break;
+ case FASTRPC_IOCTL_GET_DSP_INFO:
+ err = fastrpc_get_dsp_info(fl, argp);
+ break;
+ default:
+ err = -ENOTTY;
+ break;
+ }
+
+ return err;
+}
+
+static const struct file_operations fastrpc_fops = {
+ .open = fastrpc_device_open,
+ .release = fastrpc_device_release,
+ .unlocked_ioctl = fastrpc_device_ioctl,
+ .compat_ioctl = fastrpc_device_ioctl,
+};
+
+static int fastrpc_cb_probe(struct platform_device *pdev)
+{
+ struct fastrpc_channel_ctx *cctx;
+ struct fastrpc_session_ctx *sess;
+ struct device *dev = &pdev->dev;
+ int i, sessions = 0;
+ unsigned long flags;
+ int rc;
+
+ cctx = dev_get_drvdata(dev->parent);
+ if (!cctx)
+ return -EINVAL;
+
+ of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ if (cctx->sesscount >= FASTRPC_MAX_SESSIONS) {
+ dev_err(&pdev->dev, "too many sessions\n");
+ spin_unlock_irqrestore(&cctx->lock, flags);
+ return -ENOSPC;
+ }
+ sess = &cctx->session[cctx->sesscount++];
+ sess->used = false;
+ sess->valid = true;
+ sess->dev = dev;
+ dev_set_drvdata(dev, sess);
+
+ if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
+ dev_info(dev, "FastRPC Session ID not specified in DT\n");
+
+ if (sessions > 0) {
+ struct fastrpc_session_ctx *dup_sess;
+
+ for (i = 1; i < sessions; i++) {
+ if (cctx->sesscount >= FASTRPC_MAX_SESSIONS)
+ break;
+ dup_sess = &cctx->session[cctx->sesscount++];
+ memcpy(dup_sess, sess, sizeof(*dup_sess));
+ }
+ }
+ spin_unlock_irqrestore(&cctx->lock, flags);
+ rc = dma_set_mask(dev, DMA_BIT_MASK(32));
+ if (rc) {
+ dev_err(dev, "32-bit DMA enable failed\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static int fastrpc_cb_remove(struct platform_device *pdev)
+{
+ struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
+ struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) {
+ if (cctx->session[i].sid == sess->sid) {
+ cctx->session[i].valid = false;
+ cctx->sesscount--;
+ }
+ }
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ return 0;
+}
+
+static const struct of_device_id fastrpc_match_table[] = {
+ { .compatible = "qcom,fastrpc-compute-cb", },
+ {}
+};
+
+static struct platform_driver fastrpc_cb_driver = {
+ .probe = fastrpc_cb_probe,
+ .remove = fastrpc_cb_remove,
+ .driver = {
+ .name = "qcom,fastrpc-cb",
+ .of_match_table = fastrpc_match_table,
+ .suppress_bind_attrs = true,
+ },
+};
+
+static int fastrpc_device_register(struct device *dev, struct fastrpc_channel_ctx *cctx,
+ bool is_secured, const char *domain)
+{
+ struct fastrpc_device *fdev;
+ int err;
+
+ fdev = devm_kzalloc(dev, sizeof(*fdev), GFP_KERNEL);
+ if (!fdev)
+ return -ENOMEM;
+
+ fdev->secure = is_secured;
+ fdev->cctx = cctx;
+ fdev->miscdev.minor = MISC_DYNAMIC_MINOR;
+ fdev->miscdev.fops = &fastrpc_fops;
+ fdev->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "fastrpc-%s%s",
+ domain, is_secured ? "-secure" : "");
+ if (!fdev->miscdev.name)
+ return -ENOMEM;
+
+ err = misc_register(&fdev->miscdev);
+ if (!err) {
+ if (is_secured)
+ cctx->secure_fdevice = fdev;
+ else
+ cctx->fdevice = fdev;
+ }
+
+ return err;
+}
+
+static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
+{
+ struct device *rdev = &rpdev->dev;
+ struct fastrpc_channel_ctx *data;
+ int i, err, domain_id = -1, vmcount;
+ const char *domain;
+ bool secure_dsp;
+ unsigned int vmids[FASTRPC_MAX_VMIDS];
+
+ err = of_property_read_string(rdev->of_node, "label", &domain);
+ if (err) {
+ dev_info(rdev, "FastRPC Domain not specified in DT\n");
+ return err;
+ }
+
+ for (i = 0; i <= CDSP_DOMAIN_ID; i++) {
+ if (!strcmp(domains[i], domain)) {
+ domain_id = i;
+ break;
+ }
+ }
+
+ if (domain_id < 0) {
+ dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id);
+ return -EINVAL;
+ }
+
+ if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0))
+ dev_info(rdev, "no reserved DMA memory for FASTRPC\n");
+
+ vmcount = of_property_read_variable_u32_array(rdev->of_node,
+ "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS);
+ if (vmcount < 0)
+ vmcount = 0;
+ else if (!qcom_scm_is_available())
+ return -EPROBE_DEFER;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ if (vmcount) {
+ data->vmcount = vmcount;
+ data->perms = BIT(QCOM_SCM_VMID_HLOS);
+ for (i = 0; i < data->vmcount; i++) {
+ data->vmperms[i].vmid = vmids[i];
+ data->vmperms[i].perm = QCOM_SCM_PERM_RWX;
+ }
+ }
+
+ secure_dsp = !(of_property_read_bool(rdev->of_node, "qcom,non-secure-domain"));
+ data->secure = secure_dsp;
+
+ switch (domain_id) {
+ case ADSP_DOMAIN_ID:
+ case MDSP_DOMAIN_ID:
+ case SDSP_DOMAIN_ID:
+ /* Unsigned PD offloading is only supported on CDSP*/
+ data->unsigned_support = false;
+ err = fastrpc_device_register(rdev, data, secure_dsp, domains[domain_id]);
+ if (err)
+ goto fdev_error;
+ break;
+ case CDSP_DOMAIN_ID:
+ data->unsigned_support = true;
+ /* Create both device nodes so that we can allow both Signed and Unsigned PD */
+ err = fastrpc_device_register(rdev, data, true, domains[domain_id]);
+ if (err)
+ goto fdev_error;
+
+ err = fastrpc_device_register(rdev, data, false, domains[domain_id]);
+ if (err)
+ goto fdev_error;
+ break;
+ default:
+ err = -EINVAL;
+ goto fdev_error;
+ }
+
+ kref_init(&data->refcount);
+
+ dev_set_drvdata(&rpdev->dev, data);
+ rdev->dma_mask = &data->dma_mask;
+ dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
+ INIT_LIST_HEAD(&data->users);
+ INIT_LIST_HEAD(&data->invoke_interrupted_mmaps);
+ spin_lock_init(&data->lock);
+ idr_init(&data->ctx_idr);
+ data->domain_id = domain_id;
+ data->rpdev = rpdev;
+
+ err = of_platform_populate(rdev->of_node, NULL, NULL, rdev);
+ if (err)
+ goto populate_error;
+
+ return 0;
+
+populate_error:
+ if (data->fdevice)
+ misc_deregister(&data->fdevice->miscdev);
+ if (data->secure_fdevice)
+ misc_deregister(&data->secure_fdevice->miscdev);
+
+fdev_error:
+ kfree(data);
+ return err;
+}
+
+static void fastrpc_notify_users(struct fastrpc_user *user)
+{
+ struct fastrpc_invoke_ctx *ctx;
+
+ spin_lock(&user->lock);
+ list_for_each_entry(ctx, &user->pending, node) {
+ ctx->retval = -EPIPE;
+ complete(&ctx->work);
+ }
+ spin_unlock(&user->lock);
+}
+
+static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev)
+{
+ struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
+ struct fastrpc_buf *buf, *b;
+ struct fastrpc_user *user;
+ unsigned long flags;
+
+ /* No invocations past this point */
+ spin_lock_irqsave(&cctx->lock, flags);
+ cctx->rpdev = NULL;
+ list_for_each_entry(user, &cctx->users, user)
+ fastrpc_notify_users(user);
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ if (cctx->fdevice)
+ misc_deregister(&cctx->fdevice->miscdev);
+
+ if (cctx->secure_fdevice)
+ misc_deregister(&cctx->secure_fdevice->miscdev);
+
+ list_for_each_entry_safe(buf, b, &cctx->invoke_interrupted_mmaps, node)
+ list_del(&buf->node);
+
+ if (cctx->remote_heap)
+ fastrpc_buf_free(cctx->remote_heap);
+
+ of_platform_depopulate(&rpdev->dev);
+
+ fastrpc_channel_ctx_put(cctx);
+}
+
+static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
+ int len, void *priv, u32 addr)
+{
+ struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
+ struct fastrpc_invoke_rsp *rsp = data;
+ struct fastrpc_invoke_ctx *ctx;
+ unsigned long flags;
+ unsigned long ctxid;
+
+ if (len < sizeof(*rsp))
+ return -EINVAL;
+
+ ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4);
+
+ spin_lock_irqsave(&cctx->lock, flags);
+ ctx = idr_find(&cctx->ctx_idr, ctxid);
+ spin_unlock_irqrestore(&cctx->lock, flags);
+
+ if (!ctx) {
+ dev_err(&rpdev->dev, "No context ID matches response\n");
+ return -ENOENT;
+ }
+
+ ctx->retval = rsp->retval;
+ complete(&ctx->work);
+
+ /*
+ * The DMA buffer associated with the context cannot be freed in
+ * interrupt context so schedule it through a worker thread to
+ * avoid a kernel BUG.
+ */
+ schedule_work(&ctx->put_work);
+
+ return 0;
+}
+
+static const struct of_device_id fastrpc_rpmsg_of_match[] = {
+ { .compatible = "qcom,fastrpc" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
+
+static struct rpmsg_driver fastrpc_driver = {
+ .probe = fastrpc_rpmsg_probe,
+ .remove = fastrpc_rpmsg_remove,
+ .callback = fastrpc_rpmsg_callback,
+ .drv = {
+ .name = "qcom,fastrpc",
+ .of_match_table = fastrpc_rpmsg_of_match,
+ },
+};
+
+static int fastrpc_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&fastrpc_cb_driver);
+ if (ret < 0) {
+ pr_err("fastrpc: failed to register cb driver\n");
+ return ret;
+ }
+
+ ret = register_rpmsg_driver(&fastrpc_driver);
+ if (ret < 0) {
+ pr_err("fastrpc: failed to register rpmsg driver\n");
+ platform_driver_unregister(&fastrpc_cb_driver);
+ return ret;
+ }
+
+ return 0;
+}
+module_init(fastrpc_init);
+
+static void fastrpc_exit(void)
+{
+ platform_driver_unregister(&fastrpc_cb_driver);
+ unregister_rpmsg_driver(&fastrpc_driver);
+}
+module_exit(fastrpc_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(DMA_BUF);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 03:06:32 +0000