Hi Haowen, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on jejb-scsi/for-next] [also build test WARNING on mkp-scsi/for-next v5.18 next-20220527] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Haowen-Bai/scsi-hpsa-Fix-pointer-dereferenced-before-checking/20220530-162826 base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: arm-randconfig-r002-20220530 (https://download.01.org/0day-ci/archive/20220531/202205310427.9CgPG9aD-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0776c48f9b7e69fa447bee57c7c0985caa856be9) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/intel-lab-lkp/linux/commit/9a3105487f3b609149219bdb8adcb2b4f0108c74 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Haowen-Bai/scsi-hpsa-Fix-pointer-dereferenced-before-checking/20220530-162826 git checkout 9a3105487f3b609149219bdb8adcb2b4f0108c74 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/scsi/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/scsi/hpsa.c:5108:35: warning: variable 'map' is uninitialized when used here [-Wuninitialized] struct raid_map_disk_data *dd = &map->data[0]; ^~~ drivers/scsi/hpsa.c:5107:27: note: initialize the variable 'map' to silence this warning struct raid_map_data *map; ^ = NULL drivers/scsi/hpsa.c:9485:16: warning: variable 'transMethod' set but not used [-Wunused-but-set-variable] unsigned long transMethod = CFGTBL_Trans_Performant | ^ 2 warnings generated. vim +/map +5108 drivers/scsi/hpsa.c 6b80b18fe51540 Scott Teel 2014-02-18 5098 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5099 /* 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5100 * Attempt to perform offload RAID mapping for a logical volume I/O. 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5101 */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5102 static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5103 struct CommandList *c) 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5104 { 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5105 struct scsi_cmnd *cmd = c->scsi_cmd; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5106 struct hpsa_scsi_dev_t *dev = cmd->device->hostdata; 9a3105487f3b60 Haowen Bai 2022-05-30 5107 struct raid_map_data *map; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 @5108 struct raid_map_disk_data *dd = &map->data[0]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5109 int is_write = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5110 u32 map_index; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5111 u64 first_block, last_block; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5112 u32 block_cnt; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5113 u32 blocks_per_row; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5114 u64 first_row, last_row; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5115 u32 first_row_offset, last_row_offset; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5116 u32 first_column, last_column; 6b80b18fe51540 Scott Teel 2014-02-18 5117 u64 r0_first_row, r0_last_row; 6b80b18fe51540 Scott Teel 2014-02-18 5118 u32 r5or6_blocks_per_row; 6b80b18fe51540 Scott Teel 2014-02-18 5119 u64 r5or6_first_row, r5or6_last_row; 6b80b18fe51540 Scott Teel 2014-02-18 5120 u32 r5or6_first_row_offset, r5or6_last_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5121 u32 r5or6_first_column, r5or6_last_column; 6b80b18fe51540 Scott Teel 2014-02-18 5122 u32 total_disks_per_row; 6b80b18fe51540 Scott Teel 2014-02-18 5123 u32 stripesize; 6b80b18fe51540 Scott Teel 2014-02-18 5124 u32 first_group, last_group, current_group; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5125 u32 map_row; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5126 u32 disk_handle; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5127 u64 disk_block; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5128 u32 disk_block_cnt; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5129 u8 cdb[16]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5130 u8 cdb_len; 2b08b3e9d9dad9 Don Brace 2015-01-23 5131 u16 strip_size; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5132 #if BITS_PER_LONG == 32 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5133 u64 tmpdiv; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5134 #endif 6b80b18fe51540 Scott Teel 2014-02-18 5135 int offload_to_mirror; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5136 45e596cd6ead1c Don Brace 2016-09-09 5137 if (!dev) 45e596cd6ead1c Don Brace 2016-09-09 5138 return -1; 45e596cd6ead1c Don Brace 2016-09-09 5139 9a3105487f3b60 Haowen Bai 2022-05-30 5140 map = &dev->raid_map; 9a3105487f3b60 Haowen Bai 2022-05-30 5141 c5dfd106414f3e Don Brace 2019-05-07 5142 if (dev->in_reset) c5dfd106414f3e Don Brace 2019-05-07 5143 return -1; c5dfd106414f3e Don Brace 2019-05-07 5144 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5145 /* check for valid opcode, get LBA and block count */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5146 switch (cmd->cmnd[0]) { 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5147 case WRITE_6: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5148 is_write = 1; df561f6688fef7 Gustavo A. R. Silva 2020-08-23 5149 fallthrough; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5150 case READ_6: abbada7175999f Mahesh Rajashekhara 2016-09-16 5151 first_block = (((cmd->cmnd[1] & 0x1F) << 16) | abbada7175999f Mahesh Rajashekhara 2016-09-16 5152 (cmd->cmnd[2] << 8) | abbada7175999f Mahesh Rajashekhara 2016-09-16 5153 cmd->cmnd[3]); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5154 block_cnt = cmd->cmnd[4]; 3fa89a04e064e5 Stephen M. Cameron 2014-07-03 5155 if (block_cnt == 0) 3fa89a04e064e5 Stephen M. Cameron 2014-07-03 5156 block_cnt = 256; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5157 break; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5158 case WRITE_10: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5159 is_write = 1; df561f6688fef7 Gustavo A. R. Silva 2020-08-23 5160 fallthrough; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5161 case READ_10: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5162 first_block = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5163 (((u64) cmd->cmnd[2]) << 24) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5164 (((u64) cmd->cmnd[3]) << 16) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5165 (((u64) cmd->cmnd[4]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5166 cmd->cmnd[5]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5167 block_cnt = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5168 (((u32) cmd->cmnd[7]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5169 cmd->cmnd[8]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5170 break; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5171 case WRITE_12: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5172 is_write = 1; df561f6688fef7 Gustavo A. R. Silva 2020-08-23 5173 fallthrough; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5174 case READ_12: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5175 first_block = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5176 (((u64) cmd->cmnd[2]) << 24) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5177 (((u64) cmd->cmnd[3]) << 16) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5178 (((u64) cmd->cmnd[4]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5179 cmd->cmnd[5]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5180 block_cnt = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5181 (((u32) cmd->cmnd[6]) << 24) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5182 (((u32) cmd->cmnd[7]) << 16) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5183 (((u32) cmd->cmnd[8]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5184 cmd->cmnd[9]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5185 break; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5186 case WRITE_16: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5187 is_write = 1; df561f6688fef7 Gustavo A. R. Silva 2020-08-23 5188 fallthrough; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5189 case READ_16: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5190 first_block = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5191 (((u64) cmd->cmnd[2]) << 56) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5192 (((u64) cmd->cmnd[3]) << 48) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5193 (((u64) cmd->cmnd[4]) << 40) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5194 (((u64) cmd->cmnd[5]) << 32) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5195 (((u64) cmd->cmnd[6]) << 24) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5196 (((u64) cmd->cmnd[7]) << 16) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5197 (((u64) cmd->cmnd[8]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5198 cmd->cmnd[9]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5199 block_cnt = 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5200 (((u32) cmd->cmnd[10]) << 24) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5201 (((u32) cmd->cmnd[11]) << 16) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5202 (((u32) cmd->cmnd[12]) << 8) | 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5203 cmd->cmnd[13]; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5204 break; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5205 default: 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5206 return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5207 } 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5208 last_block = first_block + block_cnt - 1; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5209 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5210 /* check for write to non-RAID-0 */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5211 if (is_write && dev->raid_level != 0) 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5212 return IO_ACCEL_INELIGIBLE; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5213 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5214 /* check for invalid block or wraparound */ 2b08b3e9d9dad9 Don Brace 2015-01-23 5215 if (last_block >= le64_to_cpu(map->volume_blk_cnt) || 2b08b3e9d9dad9 Don Brace 2015-01-23 5216 last_block < first_block) 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5217 return IO_ACCEL_INELIGIBLE; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5218 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5219 /* calculate stripe information for the request */ 2b08b3e9d9dad9 Don Brace 2015-01-23 5220 blocks_per_row = le16_to_cpu(map->data_disks_per_row) * 2b08b3e9d9dad9 Don Brace 2015-01-23 5221 le16_to_cpu(map->strip_size); 2b08b3e9d9dad9 Don Brace 2015-01-23 5222 strip_size = le16_to_cpu(map->strip_size); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5223 #if BITS_PER_LONG == 32 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5224 tmpdiv = first_block; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5225 (void) do_div(tmpdiv, blocks_per_row); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5226 first_row = tmpdiv; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5227 tmpdiv = last_block; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5228 (void) do_div(tmpdiv, blocks_per_row); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5229 last_row = tmpdiv; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5230 first_row_offset = (u32) (first_block - (first_row * blocks_per_row)); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5231 last_row_offset = (u32) (last_block - (last_row * blocks_per_row)); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5232 tmpdiv = first_row_offset; 2b08b3e9d9dad9 Don Brace 2015-01-23 5233 (void) do_div(tmpdiv, strip_size); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5234 first_column = tmpdiv; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5235 tmpdiv = last_row_offset; 2b08b3e9d9dad9 Don Brace 2015-01-23 5236 (void) do_div(tmpdiv, strip_size); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5237 last_column = tmpdiv; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5238 #else 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5239 first_row = first_block / blocks_per_row; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5240 last_row = last_block / blocks_per_row; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5241 first_row_offset = (u32) (first_block - (first_row * blocks_per_row)); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5242 last_row_offset = (u32) (last_block - (last_row * blocks_per_row)); 2b08b3e9d9dad9 Don Brace 2015-01-23 5243 first_column = first_row_offset / strip_size; 2b08b3e9d9dad9 Don Brace 2015-01-23 5244 last_column = last_row_offset / strip_size; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5245 #endif 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5246 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5247 /* if this isn't a single row/column then give to the controller */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5248 if ((first_row != last_row) || (first_column != last_column)) 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5249 return IO_ACCEL_INELIGIBLE; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5250 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5251 /* proceeding with driver mapping */ 2b08b3e9d9dad9 Don Brace 2015-01-23 5252 total_disks_per_row = le16_to_cpu(map->data_disks_per_row) + 2b08b3e9d9dad9 Don Brace 2015-01-23 5253 le16_to_cpu(map->metadata_disks_per_row); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5254 map_row = ((u32)(first_row >> map->parity_rotation_shift)) % 2b08b3e9d9dad9 Don Brace 2015-01-23 5255 le16_to_cpu(map->row_cnt); 6b80b18fe51540 Scott Teel 2014-02-18 5256 map_index = (map_row * total_disks_per_row) + first_column; 6b80b18fe51540 Scott Teel 2014-02-18 5257 6b80b18fe51540 Scott Teel 2014-02-18 5258 switch (dev->raid_level) { 6b80b18fe51540 Scott Teel 2014-02-18 5259 case HPSA_RAID_0: 6b80b18fe51540 Scott Teel 2014-02-18 5260 break; /* nothing special to do */ 6b80b18fe51540 Scott Teel 2014-02-18 5261 case HPSA_RAID_1: 6b80b18fe51540 Scott Teel 2014-02-18 5262 /* Handles load balance across RAID 1 members. 6b80b18fe51540 Scott Teel 2014-02-18 5263 * (2-drive R1 and R10 with even # of drives.) 6b80b18fe51540 Scott Teel 2014-02-18 5264 * Appropriate for SSDs, not optimal for HDDs 3e16e83a62edac Don Brace 2020-03-20 5265 * Ensure we have the correct raid_map. 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5266 */ 3e16e83a62edac Don Brace 2020-03-20 5267 if (le16_to_cpu(map->layout_map_count) != 2) { 3e16e83a62edac Don Brace 2020-03-20 5268 hpsa_turn_off_ioaccel_for_device(dev); 3e16e83a62edac Don Brace 2020-03-20 5269 return IO_ACCEL_INELIGIBLE; 3e16e83a62edac Don Brace 2020-03-20 5270 } 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5271 if (dev->offload_to_mirror) 2b08b3e9d9dad9 Don Brace 2015-01-23 5272 map_index += le16_to_cpu(map->data_disks_per_row); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5273 dev->offload_to_mirror = !dev->offload_to_mirror; 6b80b18fe51540 Scott Teel 2014-02-18 5274 break; 6b80b18fe51540 Scott Teel 2014-02-18 5275 case HPSA_RAID_ADM: 6b80b18fe51540 Scott Teel 2014-02-18 5276 /* Handles N-way mirrors (R1-ADM) 6b80b18fe51540 Scott Teel 2014-02-18 5277 * and R10 with # of drives divisible by 3.) 3e16e83a62edac Don Brace 2020-03-20 5278 * Ensure we have the correct raid_map. 6b80b18fe51540 Scott Teel 2014-02-18 5279 */ 3e16e83a62edac Don Brace 2020-03-20 5280 if (le16_to_cpu(map->layout_map_count) != 3) { 3e16e83a62edac Don Brace 2020-03-20 5281 hpsa_turn_off_ioaccel_for_device(dev); 3e16e83a62edac Don Brace 2020-03-20 5282 return IO_ACCEL_INELIGIBLE; 3e16e83a62edac Don Brace 2020-03-20 5283 } 6b80b18fe51540 Scott Teel 2014-02-18 5284 6b80b18fe51540 Scott Teel 2014-02-18 5285 offload_to_mirror = dev->offload_to_mirror; 6b80b18fe51540 Scott Teel 2014-02-18 5286 raid_map_helper(map, offload_to_mirror, 6b80b18fe51540 Scott Teel 2014-02-18 5287 &map_index, ¤t_group); 6b80b18fe51540 Scott Teel 2014-02-18 5288 /* set mirror group to use next time */ 6b80b18fe51540 Scott Teel 2014-02-18 5289 offload_to_mirror = 2b08b3e9d9dad9 Don Brace 2015-01-23 5290 (offload_to_mirror >= 2b08b3e9d9dad9 Don Brace 2015-01-23 5291 le16_to_cpu(map->layout_map_count) - 1) 6b80b18fe51540 Scott Teel 2014-02-18 5292 ? 0 : offload_to_mirror + 1; 6b80b18fe51540 Scott Teel 2014-02-18 5293 dev->offload_to_mirror = offload_to_mirror; 6b80b18fe51540 Scott Teel 2014-02-18 5294 /* Avoid direct use of dev->offload_to_mirror within this 6b80b18fe51540 Scott Teel 2014-02-18 5295 * function since multiple threads might simultaneously 6b80b18fe51540 Scott Teel 2014-02-18 5296 * increment it beyond the range of dev->layout_map_count -1. 6b80b18fe51540 Scott Teel 2014-02-18 5297 */ 6b80b18fe51540 Scott Teel 2014-02-18 5298 break; 6b80b18fe51540 Scott Teel 2014-02-18 5299 case HPSA_RAID_5: 6b80b18fe51540 Scott Teel 2014-02-18 5300 case HPSA_RAID_6: 2b08b3e9d9dad9 Don Brace 2015-01-23 5301 if (le16_to_cpu(map->layout_map_count) <= 1) 6b80b18fe51540 Scott Teel 2014-02-18 5302 break; 6b80b18fe51540 Scott Teel 2014-02-18 5303 6b80b18fe51540 Scott Teel 2014-02-18 5304 /* Verify first and last block are in same RAID group */ 6b80b18fe51540 Scott Teel 2014-02-18 5305 r5or6_blocks_per_row = 2b08b3e9d9dad9 Don Brace 2015-01-23 5306 le16_to_cpu(map->strip_size) * 2b08b3e9d9dad9 Don Brace 2015-01-23 5307 le16_to_cpu(map->data_disks_per_row); 3e16e83a62edac Don Brace 2020-03-20 5308 if (r5or6_blocks_per_row == 0) { 3e16e83a62edac Don Brace 2020-03-20 5309 hpsa_turn_off_ioaccel_for_device(dev); 3e16e83a62edac Don Brace 2020-03-20 5310 return IO_ACCEL_INELIGIBLE; 3e16e83a62edac Don Brace 2020-03-20 5311 } 2b08b3e9d9dad9 Don Brace 2015-01-23 5312 stripesize = r5or6_blocks_per_row * 2b08b3e9d9dad9 Don Brace 2015-01-23 5313 le16_to_cpu(map->layout_map_count); 6b80b18fe51540 Scott Teel 2014-02-18 5314 #if BITS_PER_LONG == 32 6b80b18fe51540 Scott Teel 2014-02-18 5315 tmpdiv = first_block; 6b80b18fe51540 Scott Teel 2014-02-18 5316 first_group = do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5317 tmpdiv = first_group; 6b80b18fe51540 Scott Teel 2014-02-18 5318 (void) do_div(tmpdiv, r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5319 first_group = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5320 tmpdiv = last_block; 6b80b18fe51540 Scott Teel 2014-02-18 5321 last_group = do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5322 tmpdiv = last_group; 6b80b18fe51540 Scott Teel 2014-02-18 5323 (void) do_div(tmpdiv, r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5324 last_group = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5325 #else 6b80b18fe51540 Scott Teel 2014-02-18 5326 first_group = (first_block % stripesize) / r5or6_blocks_per_row; 6b80b18fe51540 Scott Teel 2014-02-18 5327 last_group = (last_block % stripesize) / r5or6_blocks_per_row; 6b80b18fe51540 Scott Teel 2014-02-18 5328 #endif 000ff7c25a1513 Stephen M. Cameron 2014-03-13 5329 if (first_group != last_group) 6b80b18fe51540 Scott Teel 2014-02-18 5330 return IO_ACCEL_INELIGIBLE; 6b80b18fe51540 Scott Teel 2014-02-18 5331 6b80b18fe51540 Scott Teel 2014-02-18 5332 /* Verify request is in a single row of RAID 5/6 */ 6b80b18fe51540 Scott Teel 2014-02-18 5333 #if BITS_PER_LONG == 32 6b80b18fe51540 Scott Teel 2014-02-18 5334 tmpdiv = first_block; 6b80b18fe51540 Scott Teel 2014-02-18 5335 (void) do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5336 first_row = r5or6_first_row = r0_first_row = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5337 tmpdiv = last_block; 6b80b18fe51540 Scott Teel 2014-02-18 5338 (void) do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5339 r5or6_last_row = r0_last_row = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5340 #else 6b80b18fe51540 Scott Teel 2014-02-18 5341 first_row = r5or6_first_row = r0_first_row = 6b80b18fe51540 Scott Teel 2014-02-18 5342 first_block / stripesize; 6b80b18fe51540 Scott Teel 2014-02-18 5343 r5or6_last_row = r0_last_row = last_block / stripesize; 6b80b18fe51540 Scott Teel 2014-02-18 5344 #endif 6b80b18fe51540 Scott Teel 2014-02-18 5345 if (r5or6_first_row != r5or6_last_row) 6b80b18fe51540 Scott Teel 2014-02-18 5346 return IO_ACCEL_INELIGIBLE; 6b80b18fe51540 Scott Teel 2014-02-18 5347 6b80b18fe51540 Scott Teel 2014-02-18 5348 6b80b18fe51540 Scott Teel 2014-02-18 5349 /* Verify request is in a single column */ 6b80b18fe51540 Scott Teel 2014-02-18 5350 #if BITS_PER_LONG == 32 6b80b18fe51540 Scott Teel 2014-02-18 5351 tmpdiv = first_block; 6b80b18fe51540 Scott Teel 2014-02-18 5352 first_row_offset = do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5353 tmpdiv = first_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5354 first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5355 r5or6_first_row_offset = first_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5356 tmpdiv = last_block; 6b80b18fe51540 Scott Teel 2014-02-18 5357 r5or6_last_row_offset = do_div(tmpdiv, stripesize); 6b80b18fe51540 Scott Teel 2014-02-18 5358 tmpdiv = r5or6_last_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5359 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5360 tmpdiv = r5or6_first_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5361 (void) do_div(tmpdiv, map->strip_size); 6b80b18fe51540 Scott Teel 2014-02-18 5362 first_column = r5or6_first_column = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5363 tmpdiv = r5or6_last_row_offset; 6b80b18fe51540 Scott Teel 2014-02-18 5364 (void) do_div(tmpdiv, map->strip_size); 6b80b18fe51540 Scott Teel 2014-02-18 5365 r5or6_last_column = tmpdiv; 6b80b18fe51540 Scott Teel 2014-02-18 5366 #else 6b80b18fe51540 Scott Teel 2014-02-18 5367 first_row_offset = r5or6_first_row_offset = 6b80b18fe51540 Scott Teel 2014-02-18 5368 (u32)((first_block % stripesize) % 6b80b18fe51540 Scott Teel 2014-02-18 5369 r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5370 6b80b18fe51540 Scott Teel 2014-02-18 5371 r5or6_last_row_offset = 6b80b18fe51540 Scott Teel 2014-02-18 5372 (u32)((last_block % stripesize) % 6b80b18fe51540 Scott Teel 2014-02-18 5373 r5or6_blocks_per_row); 6b80b18fe51540 Scott Teel 2014-02-18 5374 6b80b18fe51540 Scott Teel 2014-02-18 5375 first_column = r5or6_first_column = 2b08b3e9d9dad9 Don Brace 2015-01-23 5376 r5or6_first_row_offset / le16_to_cpu(map->strip_size); 6b80b18fe51540 Scott Teel 2014-02-18 5377 r5or6_last_column = 2b08b3e9d9dad9 Don Brace 2015-01-23 5378 r5or6_last_row_offset / le16_to_cpu(map->strip_size); 6b80b18fe51540 Scott Teel 2014-02-18 5379 #endif 6b80b18fe51540 Scott Teel 2014-02-18 5380 if (r5or6_first_column != r5or6_last_column) 6b80b18fe51540 Scott Teel 2014-02-18 5381 return IO_ACCEL_INELIGIBLE; 6b80b18fe51540 Scott Teel 2014-02-18 5382 6b80b18fe51540 Scott Teel 2014-02-18 5383 /* Request is eligible */ 6b80b18fe51540 Scott Teel 2014-02-18 5384 map_row = ((u32)(first_row >> map->parity_rotation_shift)) % 2b08b3e9d9dad9 Don Brace 2015-01-23 5385 le16_to_cpu(map->row_cnt); 6b80b18fe51540 Scott Teel 2014-02-18 5386 6b80b18fe51540 Scott Teel 2014-02-18 5387 map_index = (first_group * 2b08b3e9d9dad9 Don Brace 2015-01-23 5388 (le16_to_cpu(map->row_cnt) * total_disks_per_row)) + 6b80b18fe51540 Scott Teel 2014-02-18 5389 (map_row * total_disks_per_row) + first_column; 6b80b18fe51540 Scott Teel 2014-02-18 5390 break; 6b80b18fe51540 Scott Teel 2014-02-18 5391 default: 6b80b18fe51540 Scott Teel 2014-02-18 5392 return IO_ACCEL_INELIGIBLE; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5393 } 6b80b18fe51540 Scott Teel 2014-02-18 5394 07543e0c05de17 Stephen Cameron 2015-01-23 5395 if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES)) 07543e0c05de17 Stephen Cameron 2015-01-23 5396 return IO_ACCEL_INELIGIBLE; 07543e0c05de17 Stephen Cameron 2015-01-23 5397 03383736348bb7 Don Brace 2015-01-23 5398 c->phys_disk = dev->phys_disk[map_index]; c3390df4751177 Don Brace 2016-02-23 5399 if (!c->phys_disk) c3390df4751177 Don Brace 2016-02-23 5400 return IO_ACCEL_INELIGIBLE; 03383736348bb7 Don Brace 2015-01-23 5401 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5402 disk_handle = dd[map_index].ioaccel_handle; 2b08b3e9d9dad9 Don Brace 2015-01-23 5403 disk_block = le64_to_cpu(map->disk_starting_blk) + 2b08b3e9d9dad9 Don Brace 2015-01-23 5404 first_row * le16_to_cpu(map->strip_size) + 2b08b3e9d9dad9 Don Brace 2015-01-23 5405 (first_row_offset - first_column * 2b08b3e9d9dad9 Don Brace 2015-01-23 5406 le16_to_cpu(map->strip_size)); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5407 disk_block_cnt = block_cnt; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5408 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5409 /* handle differing logical/physical block sizes */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5410 if (map->phys_blk_shift) { 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5411 disk_block <<= map->phys_blk_shift; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5412 disk_block_cnt <<= map->phys_blk_shift; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5413 } 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5414 BUG_ON(disk_block_cnt > 0xffff); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5415 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5416 /* build the new CDB for the physical disk I/O */ 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5417 if (disk_block > 0xffffffff) { 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5418 cdb[0] = is_write ? WRITE_16 : READ_16; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5419 cdb[1] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5420 cdb[2] = (u8) (disk_block >> 56); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5421 cdb[3] = (u8) (disk_block >> 48); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5422 cdb[4] = (u8) (disk_block >> 40); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5423 cdb[5] = (u8) (disk_block >> 32); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5424 cdb[6] = (u8) (disk_block >> 24); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5425 cdb[7] = (u8) (disk_block >> 16); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5426 cdb[8] = (u8) (disk_block >> 8); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5427 cdb[9] = (u8) (disk_block); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5428 cdb[10] = (u8) (disk_block_cnt >> 24); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5429 cdb[11] = (u8) (disk_block_cnt >> 16); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5430 cdb[12] = (u8) (disk_block_cnt >> 8); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5431 cdb[13] = (u8) (disk_block_cnt); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5432 cdb[14] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5433 cdb[15] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5434 cdb_len = 16; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5435 } else { 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5436 cdb[0] = is_write ? WRITE_10 : READ_10; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5437 cdb[1] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5438 cdb[2] = (u8) (disk_block >> 24); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5439 cdb[3] = (u8) (disk_block >> 16); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5440 cdb[4] = (u8) (disk_block >> 8); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5441 cdb[5] = (u8) (disk_block); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5442 cdb[6] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5443 cdb[7] = (u8) (disk_block_cnt >> 8); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5444 cdb[8] = (u8) (disk_block_cnt); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5445 cdb[9] = 0; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5446 cdb_len = 10; 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5447 } 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5448 return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len, 03383736348bb7 Don Brace 2015-01-23 5449 dev->scsi3addr, 03383736348bb7 Don Brace 2015-01-23 5450 dev->phys_disk[map_index]); 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5451 } 283b4a9b98b192 Stephen M. Cameron 2014-02-18 5452 -- 0-DAY CI Kernel Test Service https://01.org/lkp
