s390/pci: performance statistics and debug infrastructure
Add support for reading the PCI function measurement block counters
provided by the hypervisor. Add two s390 debug features, one for
critical errors and one for tracing and provide wrappers to log data.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index c64b4b2..6138468 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -291,8 +291,10 @@
if (direction == DMA_NONE || direction == DMA_TO_DEVICE)
flags |= ZPCI_TABLE_PROTECTED;
- if (!dma_update_trans(zdev, pa, dma_addr, size, flags))
+ if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) {
+ atomic64_add(nr_pages, (atomic64_t *) &zdev->fmb->mapped_pages);
return dma_addr + offset;
+ }
out_free:
dma_free_iommu(zdev, iommu_page_index, nr_pages);
@@ -315,6 +317,7 @@
ZPCI_TABLE_PROTECTED | ZPCI_PTE_INVALID))
dev_err(dev, "Failed to unmap addr: %Lx\n", dma_addr);
+ atomic64_add(npages, (atomic64_t *) &zdev->fmb->unmapped_pages);
iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
dma_free_iommu(zdev, iommu_page_index, npages);
}
@@ -323,6 +326,7 @@
dma_addr_t *dma_handle, gfp_t flag,
struct dma_attrs *attrs)
{
+ struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
struct page *page;
unsigned long pa;
dma_addr_t map;
@@ -331,6 +335,8 @@
page = alloc_pages(flag, get_order(size));
if (!page)
return NULL;
+
+ atomic64_add(size / PAGE_SIZE, (atomic64_t *) &zdev->fmb->allocated_pages);
pa = page_to_phys(page);
memset((void *) pa, 0, size);