tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: a29fc03bd0ddaf7388cf31604ef5bd9807585109 commit: f94773e30426af02371bc80aa047d1144f7b4291 [3075/3075] ub:ubus: Add UBUS resource space basic functions config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251103/202511031846.WZN8QTuN-lkp@i...) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251103/202511031846.WZN8QTuN-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511031846.WZN8QTuN-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/ub/ubus/resource.c:98:5: warning: no previous prototype for function 'ub_assign_resource' [-Wmissing-prototypes] 98 | int ub_assign_resource(struct ub_entity *uent, int idx) | ^ drivers/ub/ubus/resource.c:98:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 98 | int ub_assign_resource(struct ub_entity *uent, int idx) | ^ | static drivers/ub/ubus/resource.c:124:6: warning: no previous prototype for function 'ub_release_resource' [-Wmissing-prototypes] 124 | void ub_release_resource(struct ub_entity *uent, int idx) | ^ drivers/ub/ubus/resource.c:124:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 124 | void ub_release_resource(struct ub_entity *uent, int idx) | ^ | static drivers/ub/ubus/resource.c:293:5: warning: no previous prototype for function 'ub_entity_alloc_mmio_idx' [-Wmissing-prototypes] 293 | int ub_entity_alloc_mmio_idx(struct ub_entity *dev, int idx) | ^ drivers/ub/ubus/resource.c:293:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 293 | int ub_entity_alloc_mmio_idx(struct ub_entity *dev, int idx) | ^ | static 3 warnings generated.

vim +/ub_assign_resource +98 drivers/ub/ubus/resource.c 97

98 int ub_assign_resource(struct ub_entity *uent, int idx) 99 { 100 struct resource *res = &uent->zone[idx].res; 101 resource_size_t size; 102 resource_size_t page_size = PAGE_SIZE; 103 /* decoder mapped address unit 1M */ 104 resource_size_t align = page_size > SZ_1M ? page_size : SZ_1M; 105 int ret; 106 107 res->name = ub_name(uent); 108 res->flags |= IORESOURCE_UNSET | IORESOURCE_SIZEALIGN; 109 size = uent->zone[idx].region.size; 110 ret = _ub_assign_resource(uent, idx, size, align); 111 if (ret < 0) { 112 ub_err(uent, "RESOURCE %d: failed to assign, size=%#llx\n", 113 idx, size); 114 return ret; 115 } 116 117 res->flags &= ~IORESOURCE_UNSET; 118 res->flags &= ~IORESOURCE_STARTALIGN; 119 ub_info(uent, "RESOURCE %d: assigned %pR\n", idx, res); 120 121 return 0; 122 } 123 124 void ub_release_resource(struct ub_entity *uent, int idx) 125 { 126 int ret; 127 128 if (uent->zone[idx].res.parent) { 129 ret = release_resource(&uent->zone[idx].res); 130 if (ret) 131 ub_err(uent, "resource release failed, ret=%d.\n", ret); 132 } 133 } 134 135 static void __iomem *ub_iomap_range(struct ub_entity *uent, int res_id, 136 unsigned long offset, unsigned long maxlen, 137 bool is_wc) 138 { 139 resource_size_t start = ub_resource_start(uent, res_id); 140 resource_size_t len = ub_resource_len(uent, res_id); 141 unsigned long flags = ub_resource_flags(uent, res_id); 142 143 if (len <= offset || !start) 144 return NULL; 145 len -= offset; 146 start += offset; 147 if (maxlen && len > maxlen) 148 len = maxlen; 149 if (!(flags & IORESOURCE_MEM)) 150 return NULL; 151 152 if (is_wc) 153 return ioremap_wc(start, len); 154 else 155 return ioremap(start, len); 156 } 157 158 void __iomem *ub_iomap(struct ub_entity *uent, int res_id, unsigned long maxlen) 159 { 160 if (res_id >= MAX_UB_RES_NUM || !uent) 161 return NULL; 162 163 return ub_iomap_range(uent, res_id, 0, maxlen, false); 164 } 165 EXPORT_SYMBOL_GPL(ub_iomap); 166 167 void __iomem *ub_iomap_wc(struct ub_entity *uent, int res_id, unsigned long maxlen) 168 { 169 if (res_id >= MAX_UB_RES_NUM || !uent) 170 return NULL; 171 172 return ub_iomap_range(uent, res_id, 0, maxlen, true); 173 } 174 EXPORT_SYMBOL_GPL(ub_iomap_wc); 175 176 void ub_iounmap(void __iomem *addr) 177 { 178 iounmap(addr); 179 } 180 EXPORT_SYMBOL_GPL(ub_iounmap); 181 182 static int ub_read_ubba_reg(struct ub_entity *uent, size_t pg_size, int idx) 183 { 184 u32 addr_l_reg[MAX_UB_RES_NUM] = { UB_ERS0_UBBA_L, UB_ERS1_UBBA_L, 185 UB_ERS2_UBBA_L }; 186 u32 addr_h_reg[MAX_UB_RES_NUM] = { UB_ERS0_UBBA_H, UB_ERS1_UBBA_H, 187 UB_ERS2_UBBA_H }; 188 u32 ss_reg[MAX_UB_RES_NUM] = { UB_ERS0_SS, UB_ERS1_SS, UB_ERS2_SS }; 189 u32 hpa_l = 0, hpa_h = 0, size = 0; 190 int ret; 191 192 ret = ub_cfg_read_dword(uent, addr_l_reg[idx], &hpa_l); 193 ret |= ub_cfg_read_dword(uent, addr_h_reg[idx], &hpa_h); 194 ret |= ub_cfg_read_dword(uent, ss_reg[idx], &size); 195 if (ret) { 196 ub_err(uent, "read reg failed when request HPA resource\n"); 197 return -EINVAL; 198 } else if (size == 0) { 199 ub_err(uent, "size is 0 when request HPA resource\n"); 200 return -EINVAL; 201 } 202 203 uent->zone[idx].res.start = ubba_gen(hpa_h, hpa_l); 204 uent->zone[idx].res.end = 205 uent->zone[idx].res.start + ((u64)size * pg_size - 1); 206 207 uent->zone[idx].res.flags = IORESOURCE_MEM; 208 uent->zone[idx].res.name = ub_name(uent); 209 uent->zone[idx].ubba_used = 1; 210 211 ub_info(uent, "mmio idx %d, %pR\n", idx, &uent->zone[idx].res); 212 return 0; 213 } 214 215 static int ub_read_sa_reg(struct ub_entity *uent, size_t pg_size, int idx) 216 { 217 u32 sa_l_reg[MAX_UB_RES_NUM] = { UB_ERS0_SA_L, UB_ERS1_SA_L, 218 UB_ERS2_SA_L }; 219 u32 sa_h_reg[MAX_UB_RES_NUM] = { UB_ERS0_SA_H, UB_ERS1_SA_H, 220 UB_ERS2_SA_H }; 221 u32 ss_reg[MAX_UB_RES_NUM] = { UB_ERS0_SS, UB_ERS1_SS, UB_ERS2_SS }; 222 u32 sa_l = 0, sa_h = 0, size = 0; 223 int ret; 224 225 ret = ub_cfg_read_dword(uent, sa_l_reg[idx], &sa_l); 226 ret |= ub_cfg_read_dword(uent, sa_h_reg[idx], &sa_h); 227 ret |= ub_cfg_read_dword(uent, ss_reg[idx], &size); 228 if (ret) { 229 ub_err(uent, "read reg failed when request SA resource\n"); 230 return -EINVAL; 231 } else if (size == 0) { 232 ub_err(uent, "size is 0 when request SA resource\n"); 233 return -EINVAL; 234 } 235 236 /* Shift left 32 bits to get upper-bit address */ 237 uent->zone[idx].region.start = ((u64)sa_h << 32) | sa_l; 238 uent->zone[idx].region.size = size * pg_size; 239 uent->zone[idx].res.flags = IORESOURCE_MEM; 240 uent->zone[idx].sa_used = 1; 241 242 return 0; 243 } 244 245 static int ub_entity_read_mmio_idx(struct ub_entity *uent, int idx) 246 { 247 struct ub_entity *pue; 248 size_t pg_size = 0; 249 250 /* ue to its mue, mue to Entity0, Entity0 use itself */ 251 pue = uent->pue; 252 if (pue->entity_idx) /* to ensure Entity0 uent */ 253 pue = pue->pue; 254 255 (void)ub_cfg_read_byte(uent, UB_SYS_PGS, (u8 *)&pg_size); 256 if ((u8)pg_size & UB_SYS_PGS_SIZE) 257 pg_size = SZ_64K; 258 else 259 pg_size = SZ_4K; 260 261 if (pue->zone[idx].ubba_used) 262 return ub_read_ubba_reg(uent, pg_size, idx); 263 264 if (pue->zone[idx].sa_used) 265 return ub_read_sa_reg(uent, pg_size, idx); 266 267 return -EPERM; 268 } 269 270 int ub_insert_resource(struct ub_entity *dev, int idx) 271 { 272 struct resource *res, *root = NULL; 273 int ret; 274 275 if (idx >= MAX_UB_RES_NUM) 276 return -EINVAL; 277 278 res = &dev->zone[idx].res; 279 if (!(res->flags & IORESOURCE_MEM)) 280 return -EINVAL; 281 282 root = &iomem_resource; 283 284 ret = insert_resource(root, res); 285 if (ret) { 286 ub_warn(dev, "failed to claim uent resource %pR\n", res); 287 return -ENOMEM; 288 } 289 290 return 0; 291 } 292 293 int ub_entity_alloc_mmio_idx(struct ub_entity *dev, int idx) 294 { 295 if (is_ibus_controller(dev) || is_idev(dev)) 296 return ub_insert_resource(dev, idx); 297 return ub_assign_resource(dev, idx); 298 } 299

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