nvdimm acpi: support Get Namespace Label Size function
Function 4 is used to get Namespace label size Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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130
hw/acpi/nvdimm.c
130
hw/acpi/nvdimm.c
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@ -216,6 +216,26 @@ static uint32_t nvdimm_slot_to_dcr_index(int slot)
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return nvdimm_slot_to_spa_index(slot) + 1;
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return nvdimm_slot_to_spa_index(slot) + 1;
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}
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}
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static NVDIMMDevice *nvdimm_get_device_by_handle(uint32_t handle)
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{
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NVDIMMDevice *nvdimm = NULL;
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GSList *list, *device_list = nvdimm_get_plugged_device_list();
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for (list = device_list; list; list = list->next) {
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NVDIMMDevice *nvd = list->data;
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int slot = object_property_get_int(OBJECT(nvd), PC_DIMM_SLOT_PROP,
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NULL);
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if (nvdimm_slot_to_handle(slot) == handle) {
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nvdimm = nvd;
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break;
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}
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}
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g_slist_free(device_list);
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return nvdimm;
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}
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/* ACPI 6.0: 5.2.25.1 System Physical Address Range Structure */
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/* ACPI 6.0: 5.2.25.1 System Physical Address Range Structure */
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static void
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static void
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nvdimm_build_structure_spa(GArray *structures, DeviceState *dev)
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nvdimm_build_structure_spa(GArray *structures, DeviceState *dev)
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@ -406,6 +426,35 @@ struct NvdimmDsmFuncNoPayloadOut {
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} QEMU_PACKED;
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} QEMU_PACKED;
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typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut;
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typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut;
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struct NvdimmFuncGetLabelSizeOut {
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/* the size of buffer filled by QEMU. */
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uint32_t len;
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uint32_t func_ret_status; /* return status code. */
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uint32_t label_size; /* the size of label data area. */
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/*
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* Maximum size of the namespace label data length supported by
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* the platform in Get/Set Namespace Label Data functions.
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*/
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uint32_t max_xfer;
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} QEMU_PACKED;
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typedef struct NvdimmFuncGetLabelSizeOut NvdimmFuncGetLabelSizeOut;
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QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelSizeOut) > 4096);
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struct NvdimmFuncGetLabelDataOut {
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/* the size of buffer filled by QEMU. */
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uint32_t len;
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uint32_t func_ret_status; /* return status code. */
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uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */
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} QEMU_PACKED;
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typedef struct NvdimmFuncGetLabelDataOut NvdimmFuncGetLabelDataOut;
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struct NvdimmFuncSetLabelDataIn {
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uint32_t offset; /* the offset in the namespace label data area. */
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uint32_t length; /* the size of data is to be written via the function. */
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uint8_t in_buf[0]; /* the data written to label data area. */
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} QEMU_PACKED;
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typedef struct NvdimmFuncSetLabelDataIn NvdimmFuncSetLabelDataIn;
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static void
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static void
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nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr)
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nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr)
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{
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{
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@ -442,16 +491,91 @@ static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
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nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
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nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
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}
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}
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/*
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* the max transfer size is the max size transferred by both a
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* 'Get Namespace Label Data' function and a 'Set Namespace Label Data'
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* function.
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*/
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static uint32_t nvdimm_get_max_xfer_label_size(void)
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{
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uint32_t max_get_size, max_set_size, dsm_memory_size = 4096;
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/*
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* the max data ACPI can read one time which is transferred by
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* the response of 'Get Namespace Label Data' function.
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*/
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max_get_size = dsm_memory_size - sizeof(NvdimmFuncGetLabelDataOut);
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/*
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* the max data ACPI can write one time which is transferred by
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* 'Set Namespace Label Data' function.
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*/
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max_set_size = dsm_memory_size - offsetof(NvdimmDsmIn, arg3) -
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sizeof(NvdimmFuncSetLabelDataIn);
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return MIN(max_get_size, max_set_size);
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}
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/*
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* DSM Spec Rev1 4.4 Get Namespace Label Size (Function Index 4).
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*
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* It gets the size of Namespace Label data area and the max data size
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* that Get/Set Namespace Label Data functions can transfer.
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*/
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static void nvdimm_dsm_label_size(NVDIMMDevice *nvdimm, hwaddr dsm_mem_addr)
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{
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NvdimmFuncGetLabelSizeOut label_size_out = {
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.len = cpu_to_le32(sizeof(label_size_out)),
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};
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uint32_t label_size, mxfer;
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label_size = nvdimm->label_size;
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mxfer = nvdimm_get_max_xfer_label_size();
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nvdimm_debug("label_size %#x, max_xfer %#x.\n", label_size, mxfer);
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label_size_out.func_ret_status = cpu_to_le32(0 /* Success */);
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label_size_out.label_size = cpu_to_le32(label_size);
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label_size_out.max_xfer = cpu_to_le32(mxfer);
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cpu_physical_memory_write(dsm_mem_addr, &label_size_out,
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sizeof(label_size_out));
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}
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static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
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static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
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{
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{
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NVDIMMDevice *nvdimm = nvdimm_get_device_by_handle(in->handle);
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/* See the comments in nvdimm_dsm_root(). */
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/* See the comments in nvdimm_dsm_root(). */
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if (!in->function) {
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if (!in->function) {
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nvdimm_dsm_function0(0 /* No function supported other than
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uint32_t supported_func = 0;
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function 0 */, dsm_mem_addr);
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if (nvdimm && nvdimm->label_size) {
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supported_func |= 0x1 /* Bit 0 indicates whether there is
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support for any functions other
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than function 0. */ |
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1 << 4 /* Get Namespace Label Size */;
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}
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nvdimm_dsm_function0(supported_func, dsm_mem_addr);
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return;
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return;
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}
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}
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/* No function except function 0 is supported yet. */
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if (!nvdimm) {
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nvdimm_dsm_no_payload(2 /* Non-Existing Memory Device */,
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dsm_mem_addr);
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return;
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}
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/* Encode DSM function according to DSM Spec Rev1. */
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switch (in->function) {
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case 4 /* Get Namespace Label Size */:
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if (nvdimm->label_size) {
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nvdimm_dsm_label_size(nvdimm, dsm_mem_addr);
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return;
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}
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break;
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}
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nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
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nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
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}
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}
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