#include <rte_memcpy.h>
#include <rte_vfio.h>
-#include "eal_private.h"
#include "eal_filesystem.h"
#include "private.h"
extern struct rte_pci_bus rte_pci_bus;
static int
-pci_get_kernel_driver_by_path(const char *filename, char *dri_name)
+pci_get_kernel_driver_by_path(const char *filename, char *dri_name,
+ size_t len)
{
int count;
char path[PATH_MAX];
name = strrchr(path, '/');
if (name) {
- strncpy(dri_name, name + 1, strlen(name + 1) + 1);
+ strlcpy(dri_name, name + 1, len);
return 0;
}
}
}
-void *
-pci_find_max_end_va(void)
+static int
+find_max_end_va(const struct rte_memseg_list *msl, void *arg)
{
- const struct rte_memseg *seg = rte_eal_get_physmem_layout();
- const struct rte_memseg *last = seg;
- unsigned i = 0;
+ size_t sz = msl->memseg_arr.len * msl->page_sz;
+ void *end_va = RTE_PTR_ADD(msl->base_va, sz);
+ void **max_va = arg;
- for (i = 0; i < RTE_MAX_MEMSEG; i++, seg++) {
- if (seg->addr == NULL)
- break;
+ if (*max_va < end_va)
+ *max_va = end_va;
+ return 0;
+}
- if (seg->addr > last->addr)
- last = seg;
+void *
+pci_find_max_end_va(void)
+{
+ void *va = NULL;
- }
- return RTE_PTR_ADD(last->addr, last->len);
+ rte_memseg_list_walk(find_max_end_va, &va);
+ return va;
}
+
/* parse one line of the "resource" sysfs file (note that the 'line'
* string is modified)
*/
/* parse driver */
snprintf(filename, sizeof(filename), "%s/driver", dirname);
- ret = pci_get_kernel_driver_by_path(filename, driver);
+ ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver));
if (ret < 0) {
RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
free(dev);
return 0;
}
+#if defined(RTE_ARCH_X86)
+static bool
+pci_one_device_iommu_support_va(struct rte_pci_device *dev)
+{
+#define VTD_CAP_MGAW_SHIFT 16
+#define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT)
+#define X86_VA_WIDTH 47 /* From Documentation/x86/x86_64/mm.txt */
+ struct rte_pci_addr *addr = &dev->addr;
+ char filename[PATH_MAX];
+ FILE *fp;
+ uint64_t mgaw, vtd_cap_reg = 0;
+
+ snprintf(filename, sizeof(filename),
+ "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap",
+ rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,
+ addr->function);
+ if (access(filename, F_OK) == -1) {
+ /* We don't have an Intel IOMMU, assume VA supported*/
+ return true;
+ }
+
+ /* We have an intel IOMMU */
+ fp = fopen(filename, "r");
+ if (fp == NULL) {
+ RTE_LOG(ERR, EAL, "%s(): can't open %s\n", __func__, filename);
+ return false;
+ }
+
+ if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) {
+ RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename);
+ fclose(fp);
+ return false;
+ }
+
+ fclose(fp);
+
+ mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;
+ if (mgaw < X86_VA_WIDTH)
+ return false;
+
+ return true;
+}
+#elif defined(RTE_ARCH_PPC_64)
+static bool
+pci_one_device_iommu_support_va(__rte_unused struct rte_pci_device *dev)
+{
+ return false;
+}
+#else
+static bool
+pci_one_device_iommu_support_va(__rte_unused struct rte_pci_device *dev)
+{
+ return true;
+}
+#endif
+
+/*
+ * All devices IOMMUs support VA as IOVA
+ */
+static bool
+pci_devices_iommu_support_va(void)
+{
+ struct rte_pci_device *dev = NULL;
+ struct rte_pci_driver *drv = NULL;
+
+ FOREACH_DRIVER_ON_PCIBUS(drv) {
+ FOREACH_DEVICE_ON_PCIBUS(dev) {
+ if (!rte_pci_match(drv, dev))
+ continue;
+ if (!pci_one_device_iommu_support_va(dev))
+ return false;
+ }
+ }
+ return true;
+}
+
/*
* Get iommu class of PCI devices on the bus.
*/
bool is_vfio_noiommu_enabled = true;
bool has_iova_va;
bool is_bound_uio;
- bool spapr_iommu =
-#if defined(RTE_ARCH_PPC_64)
- true;
-#else
- false;
-#endif
+ bool iommu_no_va;
is_bound = pci_one_device_is_bound();
if (!is_bound)
has_iova_va = pci_one_device_has_iova_va();
is_bound_uio = pci_one_device_bound_uio();
+ iommu_no_va = !pci_devices_iommu_support_va();
#ifdef VFIO_PRESENT
is_vfio_noiommu_enabled = rte_vfio_noiommu_is_enabled() == true ?
true : false;
#endif
if (has_iova_va && !is_bound_uio && !is_vfio_noiommu_enabled &&
- !spapr_iommu)
+ !iommu_no_va)
return RTE_IOVA_VA;
if (has_iova_va) {
RTE_LOG(WARNING, EAL, "vfio-noiommu mode configured\n");
if (is_bound_uio)
RTE_LOG(WARNING, EAL, "few device bound to UIO\n");
- if (spapr_iommu)
- RTE_LOG(WARNING, EAL, "sPAPR IOMMU does not support IOVA as VA\n");
+ if (iommu_no_va)
+ RTE_LOG(WARNING, EAL, "IOMMU does not support IOVA as VA\n");
}
return RTE_IOVA_PA;
if (!found)
return -1;
- dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
p->base = start;
RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start);
git.droids-corp.org / dpdk.git / blobdiff