#define DB_ADDR_SHIFT(addr) ((addr) << DB_PWM_ADDR_OFFSET_SHIFT)
+enum {
+ QEDR_USER_MMAP_IO_WC = 0,
+};
+
static inline int qedr_ib_copy_to_udata(struct ib_udata *udata, void *src,
size_t len)
{
return 0;
}
-static int qedr_add_mmap(struct qedr_ucontext *uctx, u64 phy_addr,
- unsigned long len)
-{
- struct qedr_mm *mm;
-
- mm = kzalloc(sizeof(*mm), GFP_KERNEL);
- if (!mm)
- return -ENOMEM;
-
- mm->key.phy_addr = phy_addr;
- /* This function might be called with a length which is not a multiple
- * of PAGE_SIZE, while the mapping is PAGE_SIZE grained and the kernel
- * forces this granularity by increasing the requested size if needed.
- * When qedr_mmap is called, it will search the list with the updated
- * length as a key. To prevent search failures, the length is rounded up
- * in advance to PAGE_SIZE.
- */
- mm->key.len = roundup(len, PAGE_SIZE);
- INIT_LIST_HEAD(&mm->entry);
-
- mutex_lock(&uctx->mm_list_lock);
- list_add(&mm->entry, &uctx->mm_head);
- mutex_unlock(&uctx->mm_list_lock);
-
- DP_DEBUG(uctx->dev, QEDR_MSG_MISC,
- "added (addr=0x%llx,len=0x%lx) for ctx=%p\n",
- (unsigned long long)mm->key.phy_addr,
- (unsigned long)mm->key.len, uctx);
-
- return 0;
-}
-
-static bool qedr_search_mmap(struct qedr_ucontext *uctx, u64 phy_addr,
- unsigned long len)
-{
- bool found = false;
- struct qedr_mm *mm;
-
- mutex_lock(&uctx->mm_list_lock);
- list_for_each_entry(mm, &uctx->mm_head, entry) {
- if (len != mm->key.len || phy_addr != mm->key.phy_addr)
- continue;
-
- found = true;
- break;
- }
- mutex_unlock(&uctx->mm_list_lock);
- DP_DEBUG(uctx->dev, QEDR_MSG_MISC,
- "searched for (addr=0x%llx,len=0x%lx) for ctx=%p, result=%d\n",
- mm->key.phy_addr, mm->key.len, uctx, found);
-
- return found;
-}
-
int qedr_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
{
struct ib_device *ibdev = uctx->device;
struct qedr_alloc_ucontext_resp uresp = {};
struct qedr_dev *dev = get_qedr_dev(ibdev);
struct qed_rdma_add_user_out_params oparams;
+ struct qedr_user_mmap_entry *entry;
if (!udata)
return -EFAULT;
ctx->dpi_addr = oparams.dpi_addr;
ctx->dpi_phys_addr = oparams.dpi_phys_addr;
ctx->dpi_size = oparams.dpi_size;
- INIT_LIST_HEAD(&ctx->mm_head);
- mutex_init(&ctx->mm_list_lock);
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+ entry->io_address = ctx->dpi_phys_addr;
+ entry->length = ctx->dpi_size;
+ entry->mmap_flag = QEDR_USER_MMAP_IO_WC;
+ entry->dpi = ctx->dpi;
+ entry->dev = dev;
+ rc = rdma_user_mmap_entry_insert(uctx, &entry->rdma_entry,
+ ctx->dpi_size);
+ if (rc) {
+ kfree(entry);
+ goto err;
+ }
+ ctx->db_mmap_entry = &entry->rdma_entry;
uresp.dpm_enabled = dev->user_dpm_enabled;
uresp.wids_enabled = 1;
uresp.wid_count = oparams.wid_count;
- uresp.db_pa = ctx->dpi_phys_addr;
+ uresp.db_pa = rdma_user_mmap_get_offset(ctx->db_mmap_entry);
uresp.db_size = ctx->dpi_size;
uresp.max_send_wr = dev->attr.max_sqe;
uresp.max_recv_wr = dev->attr.max_rqe;
rc = qedr_ib_copy_to_udata(udata, &uresp, sizeof(uresp));
if (rc)
- return rc;
+ goto err;
ctx->dev = dev;
- rc = qedr_add_mmap(ctx, ctx->dpi_phys_addr, ctx->dpi_size);
- if (rc)
- return rc;
-
DP_DEBUG(dev, QEDR_MSG_INIT, "Allocating user context %p\n",
&ctx->ibucontext);
return 0;
+
+err:
+ if (!ctx->db_mmap_entry)
+ dev->ops->rdma_remove_user(dev->rdma_ctx, ctx->dpi);
+ else
+ rdma_user_mmap_entry_remove(ctx->db_mmap_entry);
+
+ return rc;
}
void qedr_dealloc_ucontext(struct ib_ucontext *ibctx)
{
struct qedr_ucontext *uctx = get_qedr_ucontext(ibctx);
- struct qedr_mm *mm, *tmp;
DP_DEBUG(uctx->dev, QEDR_MSG_INIT, "Deallocating user context %p\n",
uctx);
- uctx->dev->ops->rdma_remove_user(uctx->dev->rdma_ctx, uctx->dpi);
-
- list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
- DP_DEBUG(uctx->dev, QEDR_MSG_MISC,
- "deleted (addr=0x%llx,len=0x%lx) for ctx=%p\n",
- mm->key.phy_addr, mm->key.len, uctx);
- list_del(&mm->entry);
- kfree(mm);
- }
+
+ rdma_user_mmap_entry_remove(uctx->db_mmap_entry);
}
-int qedr_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+void qedr_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
{
- struct qedr_ucontext *ucontext = get_qedr_ucontext(context);
- struct qedr_dev *dev = get_qedr_dev(context->device);
- unsigned long phys_addr = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long len = (vma->vm_end - vma->vm_start);
- unsigned long dpi_start;
+ struct qedr_user_mmap_entry *entry = get_qedr_mmap_entry(rdma_entry);
+ struct qedr_dev *dev = entry->dev;
- dpi_start = dev->db_phys_addr + (ucontext->dpi * ucontext->dpi_size);
+ if (entry->mmap_flag == QEDR_USER_MMAP_IO_WC)
+ dev->ops->rdma_remove_user(dev->rdma_ctx, entry->dpi);
- DP_DEBUG(dev, QEDR_MSG_INIT,
- "mmap invoked with vm_start=0x%pK, vm_end=0x%pK,vm_pgoff=0x%pK; dpi_start=0x%pK dpi_size=0x%x\n",
- (void *)vma->vm_start, (void *)vma->vm_end,
- (void *)vma->vm_pgoff, (void *)dpi_start, ucontext->dpi_size);
+ kfree(entry);
+}
- if ((vma->vm_start & (PAGE_SIZE - 1)) || (len & (PAGE_SIZE - 1))) {
- DP_ERR(dev,
- "failed mmap, addresses must be page aligned: start=0x%pK, end=0x%pK\n",
- (void *)vma->vm_start, (void *)vma->vm_end);
- return -EINVAL;
- }
+int qedr_mmap(struct ib_ucontext *ucontext, struct vm_area_struct *vma)
+{
+ struct ib_device *dev = ucontext->device;
+ size_t length = vma->vm_end - vma->vm_start;
+ struct rdma_user_mmap_entry *rdma_entry;
+ struct qedr_user_mmap_entry *entry;
+ int rc = 0;
+ u64 pfn;
- if (!qedr_search_mmap(ucontext, phys_addr, len)) {
- DP_ERR(dev, "failed mmap, vm_pgoff=0x%lx is not authorized\n",
- vma->vm_pgoff);
- return -EINVAL;
- }
+ ibdev_dbg(dev,
+ "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
+ vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
- if (phys_addr < dpi_start ||
- ((phys_addr + len) > (dpi_start + ucontext->dpi_size))) {
- DP_ERR(dev,
- "failed mmap, pages are outside of dpi; page address=0x%pK, dpi_start=0x%pK, dpi_size=0x%x\n",
- (void *)phys_addr, (void *)dpi_start,
- ucontext->dpi_size);
+ rdma_entry = rdma_user_mmap_entry_get(ucontext, vma);
+ if (!rdma_entry) {
+ ibdev_dbg(dev, "pgoff[%#lx] does not have valid entry\n",
+ vma->vm_pgoff);
return -EINVAL;
}
-
- if (vma->vm_flags & VM_READ) {
- DP_ERR(dev, "failed mmap, cannot map doorbell bar for read\n");
- return -EINVAL;
+ entry = get_qedr_mmap_entry(rdma_entry);
+ ibdev_dbg(dev,
+ "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
+ entry->io_address, length, entry->mmap_flag);
+
+ switch (entry->mmap_flag) {
+ case QEDR_USER_MMAP_IO_WC:
+ pfn = entry->io_address >> PAGE_SHIFT;
+ rc = rdma_user_mmap_io(ucontext, vma, pfn, length,
+ pgprot_writecombine(vma->vm_page_prot),
+ rdma_entry);
+ break;
+ default:
+ rc = -EINVAL;
}
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
- return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, len,
- vma->vm_page_prot);
+ if (rc)
+ ibdev_dbg(dev,
+ "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
+ entry->io_address, length, entry->mmap_flag, rc);
+
+ rdma_user_mmap_entry_put(rdma_entry);
+ return rc;
}
int qedr_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
projects / linux-2.6-block.git / commitdiff