From 26e55c428d43b95dfc90275182f282c7e01e2bca Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Fri, 24 Jun 2016 18:55:54 +0200 Subject: [PATCH 25/33] nvdimm acpi: abstract the operations for root & nvdimm devices RH-Author: Stefan Hajnoczi Message-id: <1466794559-27963-18-git-send-email-stefanha@redhat.com> Patchwork-id: 70784 O-Subject: [RHEV-7.3 qemu-kvm-rhev PATCH v2 17/22] nvdimm acpi: abstract the operations for root & nvdimm devices Bugzilla: 1270345 RH-Acked-by: Paolo Bonzini RH-Acked-by: Igor Mammedov RH-Acked-by: Michael S. Tsirkin From: Xiao Guangrong It separates the operations between root device and nvdimm devices in order to introducing label functions support for nvdimm device Signed-off-by: Xiao Guangrong Reviewed-by: Stefan Hajnoczi Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 189f4d56356f0301c9e61c7d35ec8c03c69e7133) Signed-off-by: Stefan Hajnoczi Signed-off-by: Miroslav Rezanina --- hw/acpi/nvdimm.c | 74 ++++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 56 insertions(+), 18 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index b01f2c6..07c95c1 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -406,6 +406,55 @@ struct NvdimmDsmFuncNoPayloadOut { } QEMU_PACKED; typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut; +static void +nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr) +{ + NvdimmDsmFunc0Out func0 = { + .len = cpu_to_le32(sizeof(func0)), + .supported_func = cpu_to_le32(supported_func), + }; + cpu_physical_memory_write(dsm_mem_addr, &func0, sizeof(func0)); +} + +static void +nvdimm_dsm_no_payload(uint32_t func_ret_status, hwaddr dsm_mem_addr) +{ + NvdimmDsmFuncNoPayloadOut out = { + .len = cpu_to_le32(sizeof(out)), + .func_ret_status = cpu_to_le32(func_ret_status), + }; + cpu_physical_memory_write(dsm_mem_addr, &out, sizeof(out)); +} + +static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr) +{ + /* + * function 0 is called to inquire which functions are supported by + * OSPM + */ + if (!in->function) { + nvdimm_dsm_function0(0 /* No function supported other than + function 0 */, dsm_mem_addr); + return; + } + + /* No function except function 0 is supported yet. */ + nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); +} + +static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr) +{ + /* See the comments in nvdimm_dsm_root(). */ + if (!in->function) { + nvdimm_dsm_function0(0 /* No function supported other than + function 0 */, dsm_mem_addr); + return; + } + + /* No function except function 0 is supported yet. */ + nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); +} + static uint64_t nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size) { @@ -436,26 +485,15 @@ nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) nvdimm_debug("Revision %#x Handler %#x Function %#x.\n", in->revision, in->handle, in->function); - /* - * function 0 is called to inquire which functions are supported by - * OSPM - */ - if (in->function == 0) { - NvdimmDsmFunc0Out func0 = { - .len = cpu_to_le32(sizeof(func0)), - /* No function supported other than function 0 */ - .supported_func = cpu_to_le32(0), - }; - cpu_physical_memory_write(dsm_mem_addr, &func0, sizeof func0); - } else { - /* No function except function 0 is supported yet. */ - NvdimmDsmFuncNoPayloadOut out = { - .len = cpu_to_le32(sizeof(out)), - .func_ret_status = cpu_to_le32(1) /* Not Supported */, - }; - cpu_physical_memory_write(dsm_mem_addr, &out, sizeof(out)); + /* Handle 0 is reserved for NVDIMM Root Device. */ + if (!in->handle) { + nvdimm_dsm_root(in, dsm_mem_addr); + goto exit; } + nvdimm_dsm_device(in, dsm_mem_addr); + +exit: g_free(in); } -- 1.8.3.1