Merge branch 'for-4.7/dsm' into libnvdimm-for-next

[cascardo/linux.git] / drivers / nvdimm / bus.c

diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index dcaefe2..04c2c3f 100644 (file)
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -443,6 +443,12 @@ static const struct nd_cmd_desc __nd_cmd_dimm_descs[] = {
                .out_num = 3,
                .out_sizes = { 4, 4, UINT_MAX, },
        },
+       [ND_CMD_CALL] = {
+               .in_num = 2,
+               .in_sizes = { sizeof(struct nd_cmd_pkg), UINT_MAX, },
+               .out_num = 1,
+               .out_sizes = { UINT_MAX, },
+       },
 };
 
 const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd)
@@ -477,6 +483,12 @@ static const struct nd_cmd_desc __nd_cmd_bus_descs[] = {
                .out_num = 3,
                .out_sizes = { 4, 4, 8, },
        },
+       [ND_CMD_CALL] = {
+               .in_num = 2,
+               .in_sizes = { sizeof(struct nd_cmd_pkg), UINT_MAX, },
+               .out_num = 1,
+               .out_sizes = { UINT_MAX, },
+       },
 };
 
 const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd)
@@ -504,6 +516,10 @@ u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
                struct nd_cmd_vendor_hdr *hdr = buf;
 
                return hdr->in_length;
+       } else if (cmd == ND_CMD_CALL) {
+               struct nd_cmd_pkg *pkg = buf;
+
+               return pkg->nd_size_in;
        }
 
        return UINT_MAX;
@@ -526,6 +542,12 @@ u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
                return out_field[1];
        else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 2)
                return out_field[1] - 8;
+       else if (cmd == ND_CMD_CALL) {
+               struct nd_cmd_pkg *pkg = (struct nd_cmd_pkg *) in_field;
+
+               return pkg->nd_size_out;
+       }
+
 
        return UINT_MAX;
 }
@@ -592,25 +614,31 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
        unsigned int cmd = _IOC_NR(ioctl_cmd);
        void __user *p = (void __user *) arg;
        struct device *dev = &nvdimm_bus->dev;
+       struct nd_cmd_pkg pkg;
        const char *cmd_name, *dimm_name;
-       unsigned long dsm_mask;
+       unsigned long cmd_mask;
        void *buf;
        int rc, i;
 
        if (nvdimm) {
                desc = nd_cmd_dimm_desc(cmd);
                cmd_name = nvdimm_cmd_name(cmd);
-               dsm_mask = nvdimm->dsm_mask ? *(nvdimm->dsm_mask) : 0;
+               cmd_mask = nvdimm->cmd_mask;
                dimm_name = dev_name(&nvdimm->dev);
        } else {
                desc = nd_cmd_bus_desc(cmd);
                cmd_name = nvdimm_bus_cmd_name(cmd);
-               dsm_mask = nd_desc->dsm_mask;
+               cmd_mask = nd_desc->cmd_mask;
                dimm_name = "bus";
        }
 
+       if (cmd == ND_CMD_CALL) {
+               if (copy_from_user(&pkg, p, sizeof(pkg)))
+                       return -EFAULT;
+       }
+
        if (!desc || (desc->out_num + desc->in_num == 0) ||
-                       !test_bit(cmd, &dsm_mask))
+                       !test_bit(cmd, &cmd_mask))
                return -ENOTTY;
 
        /* fail write commands (when read-only) */
@@ -620,6 +648,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
                case ND_CMD_SET_CONFIG_DATA:
                case ND_CMD_ARS_START:
                case ND_CMD_CLEAR_ERROR:
+               case ND_CMD_CALL:
                        dev_dbg(&nvdimm_bus->dev, "'%s' command while read-only.\n",
                                        nvdimm ? nvdimm_cmd_name(cmd)
                                        : nvdimm_bus_cmd_name(cmd));
@@ -647,6 +676,16 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
                in_len += in_size;
        }
 
+       if (cmd == ND_CMD_CALL) {
+               dev_dbg(dev, "%s:%s, idx: %llu, in: %zu, out: %zu, len %zu\n",
+                               __func__, dimm_name, pkg.nd_command,
+                               in_len, out_len, buf_len);
+
+               for (i = 0; i < ARRAY_SIZE(pkg.nd_reserved2); i++)
+                       if (pkg.nd_reserved2[i])
+                               return -EINVAL;
+       }
+
        /* process an output envelope */
        for (i = 0; i < desc->out_num; i++) {
                u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i,