When running IOMMU enabled the user is actually
interacting with IO addresses - not physical
addresses. The value in the DPDK memseg array is
the correct one in this case, and should be used
at a higher priority than attempting to look up
the address in /proc/self/pagemap (i.e. what
rte_mem_virt2phy() does).
Further, rte_mem_virt2phy() will always fail when
running as an unprivileged user, but scanning
the memory segments will work.
Change-Id: I576e685111b7f9f848337134b7b89a3cf7c85402
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/375208
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
There was already handling for a NULL map pointer pointer, but the inner
pointer wasn't checked. Treat pointer to NULL as a no-op as well to
simplify calling code.
Change-Id: I0a213233c021957ab2f4b6c1dd304034ca98b868
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/367433
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ziye Yang <optimistyzy@gmail.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
SPDK_COUNTOF works like sizeof, except it returns the number of elements
in an array instead of the number of bytes.
Change-Id: I38ff4dd3485ed9b630cc5660ff84851d0031911f
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This will allow returning a different default value per mem map.
Change-Id: I94d3de197acfb2e6ad40092ab0588ba4e951af80
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Add a top-level structure that can be reused for other kinds of memory
address translations.
Change-Id: I046f98b76b4e98087d90095d6e9dea5cd6ab7898
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Make sure the compiler arranges the fast path as the fallthrough case by
annotating the checks in spdk_vtophys().
Change-Id: If0fc3149297131894b5c7a94bff31bf8ee40326e
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Now that all DPDK memory is registered at startup, spdk_vtophys() never
needs to add new translations to the vtophys map. This means that any
lookup that fails to find an allocated map_1gb will always return
SPDK_VTOPHYS_ERROR rather than trying to allocate it and then failing
the lookup anyway.
Change-Id: I7e6f7af183199651f5808a17810a17970b0e3331
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
vtophys_get_paddr() and vtophys_get_dpdk_paddr() are doing similar
things; combine them into one function that works for all DPDK
memory addresses.
Part of the vtophys test is temporarily disabled until the next commit,
which will register all DPDK memory at startup and stop lookiing up
addresses at runtime.
Change-Id: I91312837aa1e6170bacaf3b0d2adbdc4391d3afa
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This just moves the lookup of the physical address up one level - now
_spdk_vtophys_register_one() is only responsible for filling out the
mapping table, not looking up the translation.
Change-Id: I9fd5b85da623e403fda0563b6bdebd4aaaf42864
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Rather than storing the page frame number, just store the full physical
address of each 2 MB page. This simplifies the lookup code and makes
the map generic (values are inserted and retrieved without any
modification) for future uses.
Change-Id: Ib1081513a0682f6b8b908f3401c00d87b00f484c
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Split the ref_count field of the bottom level of the vtophys map tree to
a separate array so that the pfn_2mb field can be expanded to a full 64
bits again. This doesn't change behavior for the current use as a page
frame number; it is setup work for storing an arbitrary 64-bit pointer
value in the bottom level.
Change-Id: I0bc44df3edc9df4a479229d69c2f3884d43a340d
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
These APIs can be used to register/unregister regions
of pinned, huge page memory that are separate from
huge page memory allocated by the default DPDK
allocations. These APIs will be used by an upcoming
SPDK vhost-scsi target to enable SPDK to target
NVMe DMA operations directly to VM memory that has
been allocated by QEMU using pinned huge pages.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I649a4adeeb758b29bd29cd42c8872eed3d5d6ce9
