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nvdimm acpi: support Get Namespace Label Data function 

Function 5 is used to get Namespace Label Data

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>
This commit is contained in:
Xiao Guangrong 2016-06-07 20:22:07 +08:00 committed by Michael S. Tsirkin
parent 5797dcdc7a
commit 2b9e57fc7f
1 changed files with 82 additions and 1 deletions
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83
hw/acpi/nvdimm.c
View File

@ -440,6 +440,14 @@ struct NvdimmFuncGetLabelSizeOut {
typedef struct NvdimmFuncGetLabelSizeOut NvdimmFuncGetLabelSizeOut;
QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelSizeOut) > 4096);
struct NvdimmFuncGetLabelDataIn {
uint32_t offset; /* the offset in the namespace label data area. */
uint32_t length; /* the size of data is to be read via the function. */
} QEMU_PACKED;
typedef struct NvdimmFuncGetLabelDataIn NvdimmFuncGetLabelDataIn;
QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelDataIn) +
offsetof(NvdimmDsmIn, arg3) > 4096);
struct NvdimmFuncGetLabelDataOut {
/* the size of buffer filled by QEMU. */
uint32_t len;
@ -447,6 +455,7 @@ struct NvdimmFuncGetLabelDataOut {
uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */
} QEMU_PACKED;
typedef struct NvdimmFuncGetLabelDataOut NvdimmFuncGetLabelDataOut;
QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelDataOut) > 4096);
struct NvdimmFuncSetLabelDataIn {
uint32_t offset; /* the offset in the namespace label data area. */
@ -542,6 +551,71 @@ static void nvdimm_dsm_label_size(NVDIMMDevice *nvdimm, hwaddr dsm_mem_addr)
sizeof(label_size_out));
}
static uint32_t nvdimm_rw_label_data_check(NVDIMMDevice *nvdimm,
uint32_t offset, uint32_t length)
{
uint32_t ret = 3 /* Invalid Input Parameters */;
if (offset + length < offset) {
nvdimm_debug("offset %#x + length %#x is overflow.\n", offset,
length);
return ret;
}
if (nvdimm->label_size < offset + length) {
nvdimm_debug("position %#x is beyond label data (len = %" PRIx64 ").\n",
offset + length, nvdimm->label_size);
return ret;
}
if (length > nvdimm_get_max_xfer_label_size()) {
nvdimm_debug("length (%#x) is larger than max_xfer (%#x).\n",
length, nvdimm_get_max_xfer_label_size());
return ret;
}
return 0 /* Success */;
}
/*
* DSM Spec Rev1 4.5 Get Namespace Label Data (Function Index 5).
*/
static void nvdimm_dsm_get_label_data(NVDIMMDevice *nvdimm, NvdimmDsmIn *in,
hwaddr dsm_mem_addr)
{
NVDIMMClass *nvc = NVDIMM_GET_CLASS(nvdimm);
NvdimmFuncGetLabelDataIn *get_label_data;
NvdimmFuncGetLabelDataOut *get_label_data_out;
uint32_t status;
int size;
get_label_data = (NvdimmFuncGetLabelDataIn *)in->arg3;
le32_to_cpus(&get_label_data->offset);
le32_to_cpus(&get_label_data->length);
nvdimm_debug("Read Label Data: offset %#x length %#x.\n",
get_label_data->offset, get_label_data->length);
status = nvdimm_rw_label_data_check(nvdimm, get_label_data->offset,
get_label_data->length);
if (status != 0 /* Success */) {
nvdimm_dsm_no_payload(status, dsm_mem_addr);
return;
}
size = sizeof(*get_label_data_out) + get_label_data->length;
assert(size <= 4096);
get_label_data_out = g_malloc(size);
get_label_data_out->len = cpu_to_le32(size);
get_label_data_out->func_ret_status = cpu_to_le32(0 /* Success */);
nvc->read_label_data(nvdimm, get_label_data_out->out_buf,
get_label_data->length, get_label_data->offset);
cpu_physical_memory_write(dsm_mem_addr, get_label_data_out, size);
g_free(get_label_data_out);
}
static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
{
NVDIMMDevice *nvdimm = nvdimm_get_device_by_handle(in->handle);
@ -554,7 +628,8 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
supported_func |= 0x1 /* Bit 0 indicates whether there is
support for any functions other
than function 0. */ |
1 << 4 /* Get Namespace Label Size */;
1 << 4 /* Get Namespace Label Size */ |
1 << 5 /* Get Namespace Label Data */;
}
nvdimm_dsm_function0(supported_func, dsm_mem_addr);
return;
@ -574,6 +649,12 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
return;
}
break;
case 5 /* Get Namespace Label Data */:
if (nvdimm->label_size) {
nvdimm_dsm_get_label_data(nvdimm, in, dsm_mem_addr);
return;
}
break;
}
nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);