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-rw-r--r--drivers/misc/cxl/context.c82
-rw-r--r--drivers/misc/cxl/file.c14
-rw-r--r--drivers/misc/mei/hw-me.c12
-rw-r--r--drivers/misc/vmw_vmci/vmci_queue_pair.c16
4 files changed, 91 insertions, 33 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 51fd6b524371..d1b55fe62817 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -100,6 +100,46 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master,
return 0;
}
+static int cxl_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct cxl_context *ctx = vma->vm_file->private_data;
+ unsigned long address = (unsigned long)vmf->virtual_address;
+ u64 area, offset;
+
+ offset = vmf->pgoff << PAGE_SHIFT;
+
+ pr_devel("%s: pe: %i address: 0x%lx offset: 0x%llx\n",
+ __func__, ctx->pe, address, offset);
+
+ if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
+ area = ctx->afu->psn_phys;
+ if (offset > ctx->afu->adapter->ps_size)
+ return VM_FAULT_SIGBUS;
+ } else {
+ area = ctx->psn_phys;
+ if (offset > ctx->psn_size)
+ return VM_FAULT_SIGBUS;
+ }
+
+ mutex_lock(&ctx->status_mutex);
+
+ if (ctx->status != STARTED) {
+ mutex_unlock(&ctx->status_mutex);
+ pr_devel("%s: Context not started, failing problem state access\n", __func__);
+ return VM_FAULT_SIGBUS;
+ }
+
+ vm_insert_pfn(vma, address, (area + offset) >> PAGE_SHIFT);
+
+ mutex_unlock(&ctx->status_mutex);
+
+ return VM_FAULT_NOPAGE;
+}
+
+static const struct vm_operations_struct cxl_mmap_vmops = {
+ .fault = cxl_mmap_fault,
+};
+
/*
* Map a per-context mmio space into the given vma.
*/
@@ -108,26 +148,25 @@ int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma)
u64 len = vma->vm_end - vma->vm_start;
len = min(len, ctx->psn_size);
- if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- return vm_iomap_memory(vma, ctx->afu->psn_phys, ctx->afu->adapter->ps_size);
- }
+ if (ctx->afu->current_mode != CXL_MODE_DEDICATED) {
+ /* make sure there is a valid per process space for this AFU */
+ if ((ctx->master && !ctx->afu->psa) || (!ctx->afu->pp_psa)) {
+ pr_devel("AFU doesn't support mmio space\n");
+ return -EINVAL;
+ }
- /* make sure there is a valid per process space for this AFU */
- if ((ctx->master && !ctx->afu->psa) || (!ctx->afu->pp_psa)) {
- pr_devel("AFU doesn't support mmio space\n");
- return -EINVAL;
+ /* Can't mmap until the AFU is enabled */
+ if (!ctx->afu->enabled)
+ return -EBUSY;
}
- /* Can't mmap until the AFU is enabled */
- if (!ctx->afu->enabled)
- return -EBUSY;
-
pr_devel("%s: mmio physical: %llx pe: %i master:%i\n", __func__,
ctx->psn_phys, ctx->pe , ctx->master);
+ vma->vm_flags |= VM_IO | VM_PFNMAP;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- return vm_iomap_memory(vma, ctx->psn_phys, len);
+ vma->vm_ops = &cxl_mmap_vmops;
+ return 0;
}
/*
@@ -150,12 +189,6 @@ static void __detach_context(struct cxl_context *ctx)
afu_release_irqs(ctx);
flush_work(&ctx->fault_work); /* Only needed for dedicated process */
wake_up_all(&ctx->wq);
-
- /* Release Problem State Area mapping */
- mutex_lock(&ctx->mapping_lock);
- if (ctx->mapping)
- unmap_mapping_range(ctx->mapping, 0, 0, 1);
- mutex_unlock(&ctx->mapping_lock);
}
/*
@@ -184,6 +217,17 @@ void cxl_context_detach_all(struct cxl_afu *afu)
* created and torn down after the IDR removed
*/
__detach_context(ctx);
+
+ /*
+ * We are force detaching - remove any active PSA mappings so
+ * userspace cannot interfere with the card if it comes back.
+ * Easiest way to exercise this is to unbind and rebind the
+ * driver via sysfs while it is in use.
+ */
+ mutex_lock(&ctx->mapping_lock);
+ if (ctx->mapping)
+ unmap_mapping_range(ctx->mapping, 0, 0, 1);
+ mutex_unlock(&ctx->mapping_lock);
}
mutex_unlock(&afu->contexts_lock);
}
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index e9f2f10dbb37..b15d8113877c 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -140,18 +140,20 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
pr_devel("%s: pe: %i\n", __func__, ctx->pe);
- mutex_lock(&ctx->status_mutex);
- if (ctx->status != OPENED) {
- rc = -EIO;
- goto out;
- }
-
+ /* Do this outside the status_mutex to avoid a circular dependency with
+ * the locking in cxl_mmap_fault() */
if (copy_from_user(&work, uwork,
sizeof(struct cxl_ioctl_start_work))) {
rc = -EFAULT;
goto out;
}
+ mutex_lock(&ctx->status_mutex);
+ if (ctx->status != OPENED) {
+ rc = -EIO;
+ goto out;
+ }
+
/*
* if any of the reserved fields are set or any of the unused
* flags are set it's invalid
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index ff2755062b44..06ff0a2ec960 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -234,6 +234,18 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr = mei_hcsr_read(hw);
+ /* H_RST may be found lit before reset is started,
+ * for example if preceding reset flow hasn't completed.
+ * In that case asserting H_RST will be ignored, therefore
+ * we need to clean H_RST bit to start a successful reset sequence.
+ */
+ if ((hcsr & H_RST) == H_RST) {
+ dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr);
+ hcsr &= ~H_RST;
+ mei_me_reg_write(hw, H_CSR, hcsr);
+ hcsr = mei_hcsr_read(hw);
+ }
+
hcsr |= H_RST | H_IG | H_IS;
if (intr_enable)
diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c
index 7aaaf51e1596..35f19a683822 100644
--- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
+++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
@@ -370,12 +370,12 @@ static int __qp_memcpy_to_queue(struct vmci_queue *queue,
to_copy = size - bytes_copied;
if (is_iovec) {
- struct iovec *iov = (struct iovec *)src;
+ struct msghdr *msg = (struct msghdr *)src;
int err;
/* The iovec will track bytes_copied internally. */
- err = memcpy_fromiovec((u8 *)va + page_offset,
- iov, to_copy);
+ err = memcpy_from_msg((u8 *)va + page_offset,
+ msg, to_copy);
if (err != 0) {
if (kernel_if->host)
kunmap(kernel_if->u.h.page[page_index]);
@@ -580,7 +580,7 @@ static int qp_memcpy_from_queue(void *dest,
*/
static int qp_memcpy_to_queue_iov(struct vmci_queue *queue,
u64 queue_offset,
- const void *src,
+ const void *msg,
size_t src_offset, size_t size)
{
@@ -588,7 +588,7 @@ static int qp_memcpy_to_queue_iov(struct vmci_queue *queue,
* We ignore src_offset because src is really a struct iovec * and will
* maintain offset internally.
*/
- return __qp_memcpy_to_queue(queue, queue_offset, src, size, true);
+ return __qp_memcpy_to_queue(queue, queue_offset, msg, size, true);
}
/*
@@ -3223,13 +3223,13 @@ EXPORT_SYMBOL_GPL(vmci_qpair_peek);
* of bytes enqueued or < 0 on error.
*/
ssize_t vmci_qpair_enquev(struct vmci_qp *qpair,
- void *iov,
+ struct msghdr *msg,
size_t iov_size,
int buf_type)
{
ssize_t result;
- if (!qpair || !iov)
+ if (!qpair)
return VMCI_ERROR_INVALID_ARGS;
qp_lock(qpair);
@@ -3238,7 +3238,7 @@ ssize_t vmci_qpair_enquev(struct vmci_qp *qpair,
result = qp_enqueue_locked(qpair->produce_q,
qpair->consume_q,
qpair->produce_q_size,
- iov, iov_size,
+ msg, iov_size,
qp_memcpy_to_queue_iov);
if (result == VMCI_ERROR_QUEUEPAIR_NOT_READY &&
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 18:53:25 +0000