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nvdimm acpi: support Get Namespace Label Size function

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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>
This commit is contained in:
Xiao Guangrong 2016-06-07 20:22:06 +08:00 committed by Michael S. Tsirkin
parent d15fc53f8d
commit 5797dcdc7a
1 changed files with 127 additions and 3 deletions
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130
hw/acpi/nvdimm.c
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@ -216,6 +216,26 @@ static uint32_t nvdimm_slot_to_dcr_index(int slot)
return nvdimm_slot_to_spa_index(slot) + 1;
}
static NVDIMMDevice *nvdimm_get_device_by_handle(uint32_t handle)
{
NVDIMMDevice *nvdimm = NULL;
GSList *list, *device_list = nvdimm_get_plugged_device_list();
for (list = device_list; list; list = list->next) {
NVDIMMDevice *nvd = list->data;
int slot = object_property_get_int(OBJECT(nvd), PC_DIMM_SLOT_PROP,
NULL);
if (nvdimm_slot_to_handle(slot) == handle) {
nvdimm = nvd;
break;
}
}
g_slist_free(device_list);
return nvdimm;
}
/* ACPI 6.0: 5.2.25.1 System Physical Address Range Structure */
static void
nvdimm_build_structure_spa(GArray *structures, DeviceState *dev)
@ -406,6 +426,35 @@ struct NvdimmDsmFuncNoPayloadOut {
} QEMU_PACKED;
typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut;
struct NvdimmFuncGetLabelSizeOut {
/* the size of buffer filled by QEMU. */
uint32_t len;
uint32_t func_ret_status; /* return status code. */
uint32_t label_size; /* the size of label data area. */
/*
* Maximum size of the namespace label data length supported by
* the platform in Get/Set Namespace Label Data functions.
*/
uint32_t max_xfer;
} QEMU_PACKED;
typedef struct NvdimmFuncGetLabelSizeOut NvdimmFuncGetLabelSizeOut;
QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelSizeOut) > 4096);
struct NvdimmFuncGetLabelDataOut {
/* the size of buffer filled by QEMU. */
uint32_t len;
uint32_t func_ret_status; /* return status code. */
uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */
} QEMU_PACKED;
typedef struct NvdimmFuncGetLabelDataOut NvdimmFuncGetLabelDataOut;
struct NvdimmFuncSetLabelDataIn {
uint32_t offset; /* the offset in the namespace label data area. */
uint32_t length; /* the size of data is to be written via the function. */
uint8_t in_buf[0]; /* the data written to label data area. */
} QEMU_PACKED;
typedef struct NvdimmFuncSetLabelDataIn NvdimmFuncSetLabelDataIn;
static void
nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr)
{
@ -442,16 +491,91 @@ static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
}
/*
* the max transfer size is the max size transferred by both a
* 'Get Namespace Label Data' function and a 'Set Namespace Label Data'
* function.
*/
static uint32_t nvdimm_get_max_xfer_label_size(void)
{
uint32_t max_get_size, max_set_size, dsm_memory_size = 4096;
/*
* the max data ACPI can read one time which is transferred by
* the response of 'Get Namespace Label Data' function.
*/
max_get_size = dsm_memory_size - sizeof(NvdimmFuncGetLabelDataOut);
/*
* the max data ACPI can write one time which is transferred by
* 'Set Namespace Label Data' function.
*/
max_set_size = dsm_memory_size - offsetof(NvdimmDsmIn, arg3) -
sizeof(NvdimmFuncSetLabelDataIn);
return MIN(max_get_size, max_set_size);
}
/*
* DSM Spec Rev1 4.4 Get Namespace Label Size (Function Index 4).
*
* It gets the size of Namespace Label data area and the max data size
* that Get/Set Namespace Label Data functions can transfer.
*/
static void nvdimm_dsm_label_size(NVDIMMDevice *nvdimm, hwaddr dsm_mem_addr)
{
NvdimmFuncGetLabelSizeOut label_size_out = {
.len = cpu_to_le32(sizeof(label_size_out)),
};
uint32_t label_size, mxfer;
label_size = nvdimm->label_size;
mxfer = nvdimm_get_max_xfer_label_size();
nvdimm_debug("label_size %#x, max_xfer %#x.\n", label_size, mxfer);
label_size_out.func_ret_status = cpu_to_le32(0 /* Success */);
label_size_out.label_size = cpu_to_le32(label_size);
label_size_out.max_xfer = cpu_to_le32(mxfer);
cpu_physical_memory_write(dsm_mem_addr, &label_size_out,
sizeof(label_size_out));
}
static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr)
{
NVDIMMDevice *nvdimm = nvdimm_get_device_by_handle(in->handle);
/* See the comments in nvdimm_dsm_root(). */
if (!in->function) {
nvdimm_dsm_function0(0 /* No function supported other than
function 0 */, dsm_mem_addr);
uint32_t supported_func = 0;
if (nvdimm && nvdimm->label_size) {
supported_func |= 0x1 /* Bit 0 indicates whether there is
support for any functions other
than function 0. */ |
1 << 4 /* Get Namespace Label Size */;
}
nvdimm_dsm_function0(supported_func, dsm_mem_addr);
return;
}
/* No function except function 0 is supported yet. */
if (!nvdimm) {
nvdimm_dsm_no_payload(2 /* Non-Existing Memory Device */,
dsm_mem_addr);
return;
}
/* Encode DSM function according to DSM Spec Rev1. */
switch (in->function) {
case 4 /* Get Namespace Label Size */:
if (nvdimm->label_size) {
nvdimm_dsm_label_size(nvdimm, dsm_mem_addr);
return;
}
break;
}
nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr);
}