From 2479b06ef7d826f45175aac7a0cb1f308f0b6fad Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Fri, 24 Jun 2016 18:55:56 +0200 Subject: [PATCH 27/33] nvdimm acpi: support Get Namespace Label Size function RH-Author: Stefan Hajnoczi Message-id: <1466794559-27963-20-git-send-email-stefanha@redhat.com> Patchwork-id: 70786 O-Subject: [RHEV-7.3 qemu-kvm-rhev PATCH v2 19/22] nvdimm acpi: support Get Namespace Label Size function Bugzilla: 1270345 RH-Acked-by: Paolo Bonzini RH-Acked-by: Igor Mammedov RH-Acked-by: Michael S. Tsirkin From: Xiao Guangrong Function 4 is used to get Namespace label size Reviewed-by: Stefan Hajnoczi Signed-off-by: Xiao Guangrong Reviewed-by: Stefan Hajnoczi Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 5797dcdc7ade30e8c4080d9282cd9e51b3566e14) Signed-off-by: Stefan Hajnoczi Signed-off-by: Miroslav Rezanina --- hw/acpi/nvdimm.c | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 127 insertions(+), 3 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 8b89285..4a25d8f 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -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); } -- 1.8.3.1