^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/semaphore.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <asm/rtas.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "cxl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "hcalls.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define DOWNLOAD_IMAGE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define VALIDATE_IMAGE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct ai_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) u16 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) u8 reserved0[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) u16 vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u16 device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) u16 subsystem_vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) u16 subsystem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u64 image_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u64 image_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u8 reserved1[96];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static struct semaphore sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static unsigned long *buffer[CXL_AI_MAX_ENTRIES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static struct sg_list *le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static u64 continue_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static unsigned int transfer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct update_props_workarea {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) __be32 phandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) __be32 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) __be64 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) __be32 nprops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct update_nodes_workarea {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) __be32 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) __be64 unit_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) __be32 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define DEVICE_SCOPE 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define NODE_ACTION_MASK 0xff000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define NODE_COUNT_MASK 0x00ffffff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define OPCODE_DELETE 0x01000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define OPCODE_UPDATE 0x02000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define OPCODE_ADD 0x03000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int rcall(int token, char *buf, s32 scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) spin_lock(&rtas_data_buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) memcpy(rtas_data_buf, buf, RTAS_DATA_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) rc = rtas_call(token, 2, 1, NULL, rtas_data_buf, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) memcpy(buf, rtas_data_buf, RTAS_DATA_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) spin_unlock(&rtas_data_buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int update_property(struct device_node *dn, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u32 vd, char *value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct property *new_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u32 *val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!new_prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) new_prop->name = kstrdup(name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!new_prop->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) kfree(new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) new_prop->length = vd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!new_prop->value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) kfree(new_prop->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kfree(new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) memcpy(new_prop->value, value, vd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) val = (u32 *)new_prop->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) rc = cxl_update_properties(dn, new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) pr_devel("%pOFn: update property (%s, length: %i, value: %#x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dn, name, vd, be32_to_cpu(*val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) kfree(new_prop->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) kfree(new_prop->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) kfree(new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int update_node(__be32 phandle, s32 scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct update_props_workarea *upwa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct device_node *dn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int i, rc, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) char *prop_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) u32 nprops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u32 vd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) token = rtas_token("ibm,update-properties");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (token == RTAS_UNKNOWN_SERVICE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) dn = of_find_node_by_phandle(be32_to_cpu(phandle));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!dn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) upwa = (struct update_props_workarea *)&buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) upwa->phandle = phandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) rc = rcall(token, buf, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) prop_data = buf + sizeof(*upwa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) nprops = be32_to_cpu(upwa->nprops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (*prop_data == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) prop_data++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) vd = be32_to_cpu(*(__be32 *)prop_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) prop_data += vd + sizeof(vd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) nprops--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) for (i = 0; i < nprops; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) char *prop_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) prop_name = prop_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) prop_data += strlen(prop_name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) vd = be32_to_cpu(*(__be32 *)prop_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) prop_data += sizeof(vd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if ((vd != 0x00000000) && (vd != 0x80000000)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = update_property(dn, prop_name, vd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) prop_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) pr_err("cxl: Could not update property %s - %i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) prop_name, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) prop_data += vd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) } while (rc == 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) of_node_put(dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static int update_devicetree(struct cxl *adapter, s32 scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct update_nodes_workarea *unwa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) u32 action, node_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int token, rc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) __be32 *data, phandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) token = rtas_token("ibm,update-nodes");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (token == RTAS_UNKNOWN_SERVICE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) unwa = (struct update_nodes_workarea *)&buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) unwa->unit_address = cpu_to_be64(adapter->guest->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) rc = rcall(token, buf, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (rc && rc != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) data = (__be32 *)buf + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) while (be32_to_cpu(*data) & NODE_ACTION_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) action = be32_to_cpu(*data) & NODE_ACTION_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) node_count = be32_to_cpu(*data) & NODE_COUNT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) pr_devel("device reconfiguration - action: %#x, nodes: %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) action, node_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) data++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) for (i = 0; i < node_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) phandle = *data++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) switch (action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) case OPCODE_DELETE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* nothing to do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case OPCODE_UPDATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) update_node(phandle, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) case OPCODE_ADD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* nothing to do, just move pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) data++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) } while (rc == 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int handle_image(struct cxl *adapter, int operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) long (*fct)(u64, u64, u64, u64 *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct cxl_adapter_image *ai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) size_t mod, s_copy, len_chunk = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct ai_header *header = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) unsigned int entries = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void *dest, *from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int rc = 0, need_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /* base adapter image header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) need_header = (ai->flags & CXL_AI_NEED_HEADER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (need_header) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) header = kzalloc(sizeof(struct ai_header), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) header->version = cpu_to_be16(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) header->vendor = cpu_to_be16(adapter->guest->vendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) header->device = cpu_to_be16(adapter->guest->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) header->subsystem_vendor = cpu_to_be16(adapter->guest->subsystem_vendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) header->subsystem = cpu_to_be16(adapter->guest->subsystem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) header->image_offset = cpu_to_be64(CXL_AI_HEADER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) header->image_length = cpu_to_be64(ai->len_image);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* number of entries in the list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) len_chunk = ai->len_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (need_header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) len_chunk += CXL_AI_HEADER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) entries = len_chunk / CXL_AI_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) mod = len_chunk % CXL_AI_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) entries++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (entries > CXL_AI_MAX_ENTRIES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* < -- MAX_CHUNK_SIZE = 4096 * 256 = 1048576 bytes -->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * chunk 0 ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * | header | data |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * chunk 1 ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * | data |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * ....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * chunk n ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * | data |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * ----------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) from = (void *) ai->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) for (i = 0; i < entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) dest = buffer[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) s_copy = CXL_AI_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if ((need_header) && (i == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* add adapter image header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) memcpy(buffer[i], header, sizeof(struct ai_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) s_copy = CXL_AI_BUFFER_SIZE - CXL_AI_HEADER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dest += CXL_AI_HEADER_SIZE; /* image offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if ((i == (entries - 1)) && mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) s_copy = mod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) /* copy data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (copy_from_user(dest, from, s_copy))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /* fill in the list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) le[i].phys_addr = cpu_to_be64(virt_to_phys(buffer[i]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) le[i].len = cpu_to_be64(CXL_AI_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if ((i == (entries - 1)) && mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) le[i].len = cpu_to_be64(mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) from += s_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) pr_devel("%s (op: %i, need header: %i, entries: %i, token: %#llx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) __func__, operation, need_header, entries, continue_token);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * download/validate the adapter image to the coherent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * platform facility
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) rc = fct(adapter->guest->handle, virt_to_phys(le), entries,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) &continue_token);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (rc == 0) /* success of download/validation operation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) continue_token = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) kfree(header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static int transfer_image(struct cxl *adapter, int operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct cxl_adapter_image *ai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) int afu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) switch (operation) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) case DOWNLOAD_IMAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) rc = handle_image(adapter, operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) &cxl_h_download_adapter_image, ai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) pr_devel("resetting adapter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) cxl_h_reset_adapter(adapter->guest->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) case VALIDATE_IMAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) rc = handle_image(adapter, operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) &cxl_h_validate_adapter_image, ai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) pr_devel("resetting adapter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) cxl_h_reset_adapter(adapter->guest->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) pr_devel("remove current afu\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) for (afu = 0; afu < adapter->slices; afu++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) cxl_guest_remove_afu(adapter->afu[afu]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) pr_devel("resetting adapter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) cxl_h_reset_adapter(adapter->guest->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /* The entire image has now been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) * downloaded and the validation has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * been successfully performed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * After that, the partition should call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * ibm,update-nodes and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * ibm,update-properties to receive the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * current configuration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) rc = update_devicetree(adapter, DEVICE_SCOPE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) transfer = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static long ioctl_transfer_image(struct cxl *adapter, int operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct cxl_adapter_image __user *uai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) struct cxl_adapter_image ai;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) pr_devel("%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (copy_from_user(&ai, uai, sizeof(struct cxl_adapter_image)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * Make sure reserved fields and bits are set to 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (ai.reserved1 || ai.reserved2 || ai.reserved3 || ai.reserved4 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) (ai.flags & ~CXL_AI_ALL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return transfer_image(adapter, operation, &ai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static int device_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int adapter_num = CXL_DEVT_ADAPTER(inode->i_rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct cxl *adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) int rc = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) pr_devel("in %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) BUG_ON(sizeof(struct ai_header) != CXL_AI_HEADER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /* Allows one process to open the device by using a semaphore */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (down_interruptible(&sem) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (!(adapter = get_cxl_adapter(adapter_num))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) goto err_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) file->private_data = adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) continue_token = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) transfer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) for (i = 0; i < CXL_AI_MAX_ENTRIES; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) buffer[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* aligned buffer containing list entries which describes up to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * 1 megabyte of data (256 entries of 4096 bytes each)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * Logical real address of buffer 0 - Buffer 0 length in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * Logical real address of buffer 1 - Buffer 1 length in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * Logical real address of buffer 2 - Buffer 2 length in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * ....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * ....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * Logical real address of buffer N - Buffer N length in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) le = (struct sg_list *)get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (!le) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) for (i = 0; i < CXL_AI_MAX_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) buffer[i] = (unsigned long *)get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (!buffer[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) goto err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) err1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) for (i = 0; i < CXL_AI_MAX_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (buffer[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) free_page((unsigned long) buffer[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (le)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) free_page((unsigned long) le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) put_device(&adapter->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) err_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) up(&sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) static long device_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct cxl *adapter = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) pr_devel("in %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (cmd == CXL_IOCTL_DOWNLOAD_IMAGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return ioctl_transfer_image(adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) DOWNLOAD_IMAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) (struct cxl_adapter_image __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) else if (cmd == CXL_IOCTL_VALIDATE_IMAGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return ioctl_transfer_image(adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) VALIDATE_IMAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) (struct cxl_adapter_image __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static int device_close(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct cxl *adapter = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) pr_devel("in %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) for (i = 0; i < CXL_AI_MAX_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (buffer[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) free_page((unsigned long) buffer[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (le)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) free_page((unsigned long) le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) up(&sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) put_device(&adapter->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) continue_token = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /* reload the module */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (transfer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) cxl_guest_reload_module(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) pr_devel("resetting adapter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) cxl_h_reset_adapter(adapter->guest->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) transfer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) static const struct file_operations fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) .open = device_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) .unlocked_ioctl = device_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) .compat_ioctl = compat_ptr_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) .release = device_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) void cxl_guest_remove_chardev(struct cxl *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) cdev_del(&adapter->guest->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) int cxl_guest_add_chardev(struct cxl *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) dev_t devt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) devt = MKDEV(MAJOR(cxl_get_dev()), CXL_CARD_MINOR(adapter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) cdev_init(&adapter->guest->cdev, &fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if ((rc = cdev_add(&adapter->guest->cdev, devt, 1))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) dev_err(&adapter->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) "Unable to add chardev on adapter (card%i): %i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) adapter->adapter_num, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) adapter->dev.devt = devt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) sema_init(&sem, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags