Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/highmem.h> |
| 15 | #include <linux/io.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/dma-mapping.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/scatterlist.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/blkdev.h> |
| 22 | |
| 23 | #include <linux/mmc/mmc.h> |
| 24 | #include <linux/mmc/host.h> |
| 25 | #include <linux/mmc/card.h> |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 26 | #include <linux/pm_runtime.h> |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 27 | #include <linux/workqueue.h> |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 28 | |
| 29 | #include "cmdq_hci.h" |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 30 | #include "sdhci.h" |
| 31 | #include "sdhci-msm.h" |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 32 | |
| 33 | #define DCMD_SLOT 31 |
| 34 | #define NUM_SLOTS 32 |
| 35 | |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 36 | /* 1 sec */ |
| 37 | #define HALT_TIMEOUT_MS 1000 |
| 38 | |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 39 | static int cmdq_halt_poll(struct mmc_host *mmc); |
Ritesh Harjani | 6217c04 | 2015-10-01 20:34:42 +0530 | [diff] [blame] | 40 | static int cmdq_halt(struct mmc_host *mmc, bool halt); |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 41 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 42 | #ifdef CONFIG_PM_RUNTIME |
| 43 | static int cmdq_runtime_pm_get(struct cmdq_host *host) |
| 44 | { |
| 45 | return pm_runtime_get_sync(host->mmc->parent); |
| 46 | } |
| 47 | static int cmdq_runtime_pm_put(struct cmdq_host *host) |
| 48 | { |
| 49 | pm_runtime_mark_last_busy(host->mmc->parent); |
| 50 | return pm_runtime_put_autosuspend(host->mmc->parent); |
| 51 | } |
| 52 | #else |
| 53 | static inline int cmdq_runtime_pm_get(struct cmdq_host *host) |
| 54 | { |
| 55 | return 0; |
| 56 | } |
| 57 | static inline int cmdq_runtime_pm_put(struct cmdq_host *host) |
| 58 | { |
| 59 | return 0; |
| 60 | } |
| 61 | #endif |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 62 | static inline struct mmc_request *get_req_by_tag(struct cmdq_host *cq_host, |
| 63 | unsigned int tag) |
| 64 | { |
| 65 | return cq_host->mrq_slot[tag]; |
| 66 | } |
| 67 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 68 | static inline u8 *get_desc(struct cmdq_host *cq_host, u8 tag) |
| 69 | { |
| 70 | return cq_host->desc_base + (tag * cq_host->slot_sz); |
| 71 | } |
| 72 | |
| 73 | static inline u8 *get_link_desc(struct cmdq_host *cq_host, u8 tag) |
| 74 | { |
| 75 | u8 *desc = get_desc(cq_host, tag); |
| 76 | |
| 77 | return desc + cq_host->task_desc_len; |
| 78 | } |
| 79 | |
| 80 | static inline dma_addr_t get_trans_desc_dma(struct cmdq_host *cq_host, u8 tag) |
| 81 | { |
| 82 | return cq_host->trans_desc_dma_base + |
| 83 | (cq_host->mmc->max_segs * tag * |
| 84 | cq_host->trans_desc_len); |
| 85 | } |
| 86 | |
| 87 | static inline u8 *get_trans_desc(struct cmdq_host *cq_host, u8 tag) |
| 88 | { |
| 89 | return cq_host->trans_desc_base + |
| 90 | (cq_host->trans_desc_len * cq_host->mmc->max_segs * tag); |
| 91 | } |
| 92 | |
| 93 | static void setup_trans_desc(struct cmdq_host *cq_host, u8 tag) |
| 94 | { |
| 95 | u8 *link_temp; |
| 96 | dma_addr_t trans_temp; |
| 97 | |
| 98 | link_temp = get_link_desc(cq_host, tag); |
| 99 | trans_temp = get_trans_desc_dma(cq_host, tag); |
| 100 | |
| 101 | memset(link_temp, 0, cq_host->link_desc_len); |
| 102 | if (cq_host->link_desc_len > 8) |
| 103 | *(link_temp + 8) = 0; |
| 104 | |
| 105 | if (tag == DCMD_SLOT) { |
| 106 | *link_temp = VALID(0) | ACT(0) | END(1); |
| 107 | return; |
| 108 | } |
| 109 | |
| 110 | *link_temp = VALID(1) | ACT(0x6) | END(0); |
| 111 | |
| 112 | if (cq_host->dma64) { |
| 113 | __le64 *data_addr = (__le64 __force *)(link_temp + 4); |
| 114 | data_addr[0] = cpu_to_le64(trans_temp); |
| 115 | } else { |
| 116 | __le32 *data_addr = (__le32 __force *)(link_temp + 4); |
| 117 | data_addr[0] = cpu_to_le32(trans_temp); |
| 118 | } |
| 119 | } |
| 120 | |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 121 | static void cmdq_set_halt_irq(struct cmdq_host *cq_host, bool enable) |
| 122 | { |
| 123 | u32 ier; |
| 124 | |
| 125 | ier = cmdq_readl(cq_host, CQISTE); |
| 126 | if (enable) { |
| 127 | cmdq_writel(cq_host, ier | HALT, CQISTE); |
| 128 | cmdq_writel(cq_host, ier | HALT, CQISGE); |
| 129 | } else { |
| 130 | cmdq_writel(cq_host, ier & ~HALT, CQISTE); |
| 131 | cmdq_writel(cq_host, ier & ~HALT, CQISGE); |
| 132 | } |
| 133 | } |
| 134 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 135 | static void cmdq_clear_set_irqs(struct cmdq_host *cq_host, u32 clear, u32 set) |
| 136 | { |
| 137 | u32 ier; |
| 138 | |
| 139 | ier = cmdq_readl(cq_host, CQISTE); |
| 140 | ier &= ~clear; |
| 141 | ier |= set; |
| 142 | cmdq_writel(cq_host, ier, CQISTE); |
| 143 | cmdq_writel(cq_host, ier, CQISGE); |
| 144 | /* ensure the writes are done */ |
| 145 | mb(); |
| 146 | } |
| 147 | |
| 148 | |
| 149 | #define DRV_NAME "cmdq-host" |
| 150 | |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 151 | static void cmdq_dump_task_history(struct cmdq_host *cq_host) |
| 152 | { |
| 153 | int i; |
| 154 | |
| 155 | if (likely(!cq_host->mmc->cmdq_thist_enabled)) |
| 156 | return; |
| 157 | |
| 158 | if (!cq_host->thist) { |
| 159 | pr_err("%s: %s: CMDQ task history buffer not allocated\n", |
| 160 | mmc_hostname(cq_host->mmc), __func__); |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | pr_err("---- Circular Task History ----\n"); |
| 165 | pr_err(DRV_NAME ": Last entry index: %d", cq_host->thist_idx - 1); |
| 166 | |
| 167 | for (i = 0; i < cq_host->num_slots; i++) { |
| 168 | pr_err(DRV_NAME ": [%02d]%s Task: 0x%08x | Args: 0x%08x\n", i, |
| 169 | (cq_host->thist[i].is_dcmd) ? "DCMD" : "DATA", |
| 170 | lower_32_bits(cq_host->thist[i].task), |
| 171 | upper_32_bits(cq_host->thist[i].task)); |
| 172 | } |
| 173 | pr_err("-------------------------\n"); |
| 174 | } |
| 175 | |
Ritesh Harjani | 6217c04 | 2015-10-01 20:34:42 +0530 | [diff] [blame] | 176 | static void cmdq_dump_adma_mem(struct cmdq_host *cq_host) |
| 177 | { |
| 178 | struct mmc_host *mmc = cq_host->mmc; |
| 179 | dma_addr_t desc_dma; |
| 180 | int tag = 0; |
| 181 | unsigned long data_active_reqs = |
| 182 | mmc->cmdq_ctx.data_active_reqs; |
| 183 | unsigned long desc_size = |
| 184 | (cq_host->mmc->max_segs * cq_host->trans_desc_len); |
| 185 | |
| 186 | for_each_set_bit(tag, &data_active_reqs, cq_host->num_slots) { |
| 187 | desc_dma = get_trans_desc_dma(cq_host, tag); |
| 188 | pr_err("%s: %s: tag = %d, trans_dma(phys) = %pad, trans_desc(virt) = 0x%p\n", |
| 189 | mmc_hostname(mmc), __func__, tag, |
| 190 | &desc_dma, get_trans_desc(cq_host, tag)); |
| 191 | print_hex_dump(KERN_ERR, "cmdq-adma:", DUMP_PREFIX_ADDRESS, |
| 192 | 32, 8, get_trans_desc(cq_host, tag), |
| 193 | (desc_size), false); |
| 194 | } |
| 195 | } |
| 196 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 197 | static void cmdq_dumpregs(struct cmdq_host *cq_host) |
| 198 | { |
| 199 | struct mmc_host *mmc = cq_host->mmc; |
| 200 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 201 | pr_err(DRV_NAME ": ========== REGISTER DUMP (%s)==========\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 202 | mmc_hostname(mmc)); |
| 203 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 204 | pr_err(DRV_NAME ": Caps: 0x%08x | Version: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 205 | cmdq_readl(cq_host, CQCAP), |
| 206 | cmdq_readl(cq_host, CQVER)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 207 | pr_err(DRV_NAME ": Queing config: 0x%08x | Queue Ctrl: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 208 | cmdq_readl(cq_host, CQCFG), |
| 209 | cmdq_readl(cq_host, CQCTL)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 210 | pr_err(DRV_NAME ": Int stat: 0x%08x | Int enab: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 211 | cmdq_readl(cq_host, CQIS), |
| 212 | cmdq_readl(cq_host, CQISTE)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 213 | pr_err(DRV_NAME ": Int sig: 0x%08x | Int Coal: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 214 | cmdq_readl(cq_host, CQISGE), |
| 215 | cmdq_readl(cq_host, CQIC)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 216 | pr_err(DRV_NAME ": TDL base: 0x%08x | TDL up32: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 217 | cmdq_readl(cq_host, CQTDLBA), |
| 218 | cmdq_readl(cq_host, CQTDLBAU)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 219 | pr_err(DRV_NAME ": Doorbell: 0x%08x | Comp Notif: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 220 | cmdq_readl(cq_host, CQTDBR), |
| 221 | cmdq_readl(cq_host, CQTCN)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 222 | pr_err(DRV_NAME ": Dev queue: 0x%08x | Dev Pend: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 223 | cmdq_readl(cq_host, CQDQS), |
| 224 | cmdq_readl(cq_host, CQDPT)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 225 | pr_err(DRV_NAME ": Task clr: 0x%08x | Send stat 1: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 226 | cmdq_readl(cq_host, CQTCLR), |
| 227 | cmdq_readl(cq_host, CQSSC1)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 228 | pr_err(DRV_NAME ": Send stat 2: 0x%08x | DCMD resp: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 229 | cmdq_readl(cq_host, CQSSC2), |
| 230 | cmdq_readl(cq_host, CQCRDCT)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 231 | pr_err(DRV_NAME ": Resp err mask: 0x%08x | Task err: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 232 | cmdq_readl(cq_host, CQRMEM), |
| 233 | cmdq_readl(cq_host, CQTERRI)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 234 | pr_err(DRV_NAME ": Resp idx 0x%08x | Resp arg: 0x%08x\n", |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 235 | cmdq_readl(cq_host, CQCRI), |
| 236 | cmdq_readl(cq_host, CQCRA)); |
Asutosh Das | c0ed9c4 | 2015-05-29 15:39:37 +0530 | [diff] [blame] | 237 | pr_err(DRV_NAME": Vendor cfg 0x%08x\n", |
| 238 | cmdq_readl(cq_host, CQ_VENDOR_CFG)); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 239 | pr_err(DRV_NAME ": ===========================================\n"); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 240 | |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 241 | cmdq_dump_task_history(cq_host); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 242 | if (cq_host->ops->dump_vendor_regs) |
| 243 | cq_host->ops->dump_vendor_regs(mmc); |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * The allocated descriptor table for task, link & transfer descritors |
| 248 | * looks like: |
| 249 | * |----------| |
| 250 | * |task desc | |->|----------| |
| 251 | * |----------| | |trans desc| |
| 252 | * |link desc-|->| |----------| |
| 253 | * |----------| . |
| 254 | * . . |
| 255 | * no. of slots max-segs |
| 256 | * . |----------| |
| 257 | * |----------| |
| 258 | * The idea here is to create the [task+trans] table and mark & point the |
| 259 | * link desc to the transfer desc table on a per slot basis. |
| 260 | */ |
| 261 | static int cmdq_host_alloc_tdl(struct cmdq_host *cq_host) |
| 262 | { |
| 263 | |
| 264 | size_t desc_size; |
| 265 | size_t data_size; |
| 266 | int i = 0; |
| 267 | |
| 268 | /* task descriptor can be 64/128 bit irrespective of arch */ |
| 269 | if (cq_host->caps & CMDQ_TASK_DESC_SZ_128) { |
| 270 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQCFG) | |
| 271 | CQ_TASK_DESC_SZ, CQCFG); |
| 272 | cq_host->task_desc_len = 16; |
| 273 | } else { |
| 274 | cq_host->task_desc_len = 8; |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * 96 bits length of transfer desc instead of 128 bits which means |
| 279 | * ADMA would expect next valid descriptor at the 96th bit |
| 280 | * or 128th bit |
| 281 | */ |
| 282 | if (cq_host->dma64) { |
| 283 | if (cq_host->quirks & CMDQ_QUIRK_SHORT_TXFR_DESC_SZ) |
| 284 | cq_host->trans_desc_len = 12; |
| 285 | else |
| 286 | cq_host->trans_desc_len = 16; |
| 287 | cq_host->link_desc_len = 16; |
| 288 | } else { |
| 289 | cq_host->trans_desc_len = 8; |
| 290 | cq_host->link_desc_len = 8; |
| 291 | } |
| 292 | |
| 293 | /* total size of a slot: 1 task & 1 transfer (link) */ |
| 294 | cq_host->slot_sz = cq_host->task_desc_len + cq_host->link_desc_len; |
| 295 | |
| 296 | desc_size = cq_host->slot_sz * cq_host->num_slots; |
| 297 | |
| 298 | data_size = cq_host->trans_desc_len * cq_host->mmc->max_segs * |
| 299 | (cq_host->num_slots - 1); |
| 300 | |
| 301 | pr_info("%s: desc_size: %d data_sz: %d slot-sz: %d\n", __func__, |
| 302 | (int)desc_size, (int)data_size, cq_host->slot_sz); |
| 303 | |
| 304 | /* |
| 305 | * allocate a dma-mapped chunk of memory for the descriptors |
| 306 | * allocate a dma-mapped chunk of memory for link descriptors |
| 307 | * setup each link-desc memory offset per slot-number to |
| 308 | * the descriptor table. |
| 309 | */ |
| 310 | cq_host->desc_base = dmam_alloc_coherent(mmc_dev(cq_host->mmc), |
| 311 | desc_size, |
| 312 | &cq_host->desc_dma_base, |
| 313 | GFP_KERNEL); |
| 314 | cq_host->trans_desc_base = dmam_alloc_coherent(mmc_dev(cq_host->mmc), |
| 315 | data_size, |
| 316 | &cq_host->trans_desc_dma_base, |
| 317 | GFP_KERNEL); |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 318 | cq_host->thist = devm_kzalloc(mmc_dev(cq_host->mmc), |
| 319 | (sizeof(*cq_host->thist) * |
| 320 | cq_host->num_slots), |
| 321 | GFP_KERNEL); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 322 | if (!cq_host->desc_base || !cq_host->trans_desc_base) |
| 323 | return -ENOMEM; |
| 324 | |
| 325 | pr_info("desc-base: 0x%p trans-base: 0x%p\n desc_dma 0x%llx trans_dma: 0x%llx\n", |
| 326 | cq_host->desc_base, cq_host->trans_desc_base, |
| 327 | (unsigned long long)cq_host->desc_dma_base, |
| 328 | (unsigned long long) cq_host->trans_desc_dma_base); |
| 329 | |
| 330 | for (; i < (cq_host->num_slots); i++) |
| 331 | setup_trans_desc(cq_host, i); |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | static int cmdq_enable(struct mmc_host *mmc) |
| 337 | { |
| 338 | int err = 0; |
| 339 | u32 cqcfg; |
| 340 | bool dcmd_enable; |
| 341 | struct cmdq_host *cq_host = mmc_cmdq_private(mmc); |
| 342 | |
| 343 | if (!cq_host || !mmc->card || !mmc_card_cmdq(mmc->card)) { |
| 344 | err = -EINVAL; |
| 345 | goto out; |
| 346 | } |
| 347 | |
| 348 | if (cq_host->enabled) |
| 349 | goto out; |
| 350 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 351 | cmdq_runtime_pm_get(cq_host); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 352 | cqcfg = cmdq_readl(cq_host, CQCFG); |
| 353 | if (cqcfg & 0x1) { |
| 354 | pr_info("%s: %s: cq_host is already enabled\n", |
| 355 | mmc_hostname(mmc), __func__); |
| 356 | WARN_ON(1); |
Venkat Gopalakrishnan | 632b13b | 2015-08-24 14:36:59 -0700 | [diff] [blame] | 357 | goto pm_ref_count; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | if (cq_host->quirks & CMDQ_QUIRK_NO_DCMD) |
| 361 | dcmd_enable = false; |
| 362 | else |
| 363 | dcmd_enable = true; |
| 364 | |
| 365 | cqcfg = ((cq_host->caps & CMDQ_TASK_DESC_SZ_128 ? CQ_TASK_DESC_SZ : 0) | |
| 366 | (dcmd_enable ? CQ_DCMD : 0)); |
| 367 | |
| 368 | cmdq_writel(cq_host, cqcfg, CQCFG); |
| 369 | /* enable CQ_HOST */ |
| 370 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQCFG) | CQ_ENABLE, |
| 371 | CQCFG); |
| 372 | |
| 373 | if (!cq_host->desc_base || |
| 374 | !cq_host->trans_desc_base) { |
| 375 | err = cmdq_host_alloc_tdl(cq_host); |
| 376 | if (err) |
Venkat Gopalakrishnan | 632b13b | 2015-08-24 14:36:59 -0700 | [diff] [blame] | 377 | goto pm_ref_count; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Konstantin Dorfman | 14c902d | 2015-06-11 11:33:23 +0300 | [diff] [blame] | 380 | cmdq_writel(cq_host, lower_32_bits(cq_host->desc_dma_base), CQTDLBA); |
| 381 | cmdq_writel(cq_host, upper_32_bits(cq_host->desc_dma_base), CQTDLBAU); |
| 382 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 383 | /* |
| 384 | * disable all vendor interrupts |
| 385 | * enable CMDQ interrupts |
| 386 | * enable the vendor error interrupts |
| 387 | */ |
| 388 | if (cq_host->ops->clear_set_irqs) |
| 389 | cq_host->ops->clear_set_irqs(mmc, true); |
| 390 | |
| 391 | cmdq_clear_set_irqs(cq_host, 0x0, CQ_INT_ALL); |
| 392 | |
| 393 | /* cq_host would use this rca to address the card */ |
| 394 | cmdq_writel(cq_host, mmc->card->rca, CQSSC2); |
| 395 | |
| 396 | /* send QSR at lesser intervals than the default */ |
Asutosh Das | 5b81f13 | 2015-10-06 09:53:33 +0530 | [diff] [blame] | 397 | cmdq_writel(cq_host, SEND_QSR_INTERVAL, CQSSC1); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 398 | |
Dov Levenglick | 2b67830 | 2015-07-01 14:24:20 +0300 | [diff] [blame] | 399 | /* enable bkops exception indication */ |
Dov Levenglick | aea348b | 2015-07-20 11:59:52 +0300 | [diff] [blame] | 400 | if (mmc_card_configured_manual_bkops(mmc->card) && |
| 401 | !mmc_card_configured_auto_bkops(mmc->card)) |
Dov Levenglick | 2b67830 | 2015-07-01 14:24:20 +0300 | [diff] [blame] | 402 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQRMEM) | CQ_EXCEPTION, |
| 403 | CQRMEM); |
| 404 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 405 | /* ensure the writes are done before enabling CQE */ |
| 406 | mb(); |
| 407 | |
| 408 | cq_host->enabled = true; |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 409 | mmc_host_clr_cq_disable(mmc); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 410 | |
| 411 | if (cq_host->ops->set_block_size) |
| 412 | cq_host->ops->set_block_size(cq_host->mmc); |
| 413 | |
| 414 | if (cq_host->ops->set_data_timeout) |
| 415 | cq_host->ops->set_data_timeout(mmc, 0xf); |
| 416 | |
| 417 | if (cq_host->ops->clear_set_dumpregs) |
| 418 | cq_host->ops->clear_set_dumpregs(mmc, 1); |
| 419 | |
Ritesh Harjani | 6b2ea57 | 2015-07-15 13:23:05 +0530 | [diff] [blame] | 420 | if (cq_host->ops->enhanced_strobe_mask) |
| 421 | cq_host->ops->enhanced_strobe_mask(mmc, true); |
Venkat Gopalakrishnan | 632b13b | 2015-08-24 14:36:59 -0700 | [diff] [blame] | 422 | |
| 423 | pm_ref_count: |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 424 | cmdq_runtime_pm_put(cq_host); |
Venkat Gopalakrishnan | 632b13b | 2015-08-24 14:36:59 -0700 | [diff] [blame] | 425 | out: |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 426 | return err; |
| 427 | } |
| 428 | |
| 429 | static void cmdq_disable(struct mmc_host *mmc, bool soft) |
| 430 | { |
| 431 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
| 432 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 433 | cmdq_runtime_pm_get(cq_host); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 434 | if (soft) { |
| 435 | cmdq_writel(cq_host, cmdq_readl( |
| 436 | cq_host, CQCFG) & ~(CQ_ENABLE), |
| 437 | CQCFG); |
| 438 | } |
Ritesh Harjani | 6b2ea57 | 2015-07-15 13:23:05 +0530 | [diff] [blame] | 439 | if (cq_host->ops->enhanced_strobe_mask) |
| 440 | cq_host->ops->enhanced_strobe_mask(mmc, false); |
| 441 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 442 | cmdq_runtime_pm_put(cq_host); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 443 | cq_host->enabled = false; |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 444 | mmc_host_set_cq_disable(mmc); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 447 | static void cmdq_reset(struct mmc_host *mmc, bool soft) |
| 448 | { |
| 449 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
| 450 | unsigned int cqcfg; |
| 451 | unsigned int tdlba; |
| 452 | unsigned int tdlbau; |
| 453 | unsigned int rca; |
| 454 | int ret; |
| 455 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 456 | cmdq_runtime_pm_get(cq_host); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 457 | cqcfg = cmdq_readl(cq_host, CQCFG); |
| 458 | tdlba = cmdq_readl(cq_host, CQTDLBA); |
| 459 | tdlbau = cmdq_readl(cq_host, CQTDLBAU); |
| 460 | rca = cmdq_readl(cq_host, CQSSC2); |
| 461 | |
| 462 | cmdq_disable(mmc, true); |
| 463 | |
| 464 | if (cq_host->ops->reset) { |
| 465 | ret = cq_host->ops->reset(mmc); |
| 466 | if (ret) { |
| 467 | pr_crit("%s: reset CMDQ controller: failed\n", |
| 468 | mmc_hostname(mmc)); |
| 469 | BUG(); |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | cmdq_writel(cq_host, tdlba, CQTDLBA); |
| 474 | cmdq_writel(cq_host, tdlbau, CQTDLBAU); |
| 475 | |
| 476 | if (cq_host->ops->clear_set_irqs) |
| 477 | cq_host->ops->clear_set_irqs(mmc, true); |
| 478 | |
| 479 | cmdq_clear_set_irqs(cq_host, 0x0, CQ_INT_ALL); |
| 480 | |
| 481 | /* cq_host would use this rca to address the card */ |
| 482 | cmdq_writel(cq_host, rca, CQSSC2); |
| 483 | |
| 484 | /* ensure the writes are done before enabling CQE */ |
| 485 | mb(); |
| 486 | |
| 487 | cmdq_writel(cq_host, cqcfg, CQCFG); |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 488 | cmdq_runtime_pm_put(cq_host); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 489 | cq_host->enabled = true; |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 490 | mmc_host_clr_cq_disable(mmc); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 491 | } |
| 492 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 493 | static void cmdq_prep_task_desc(struct mmc_request *mrq, |
| 494 | u64 *data, bool intr, bool qbr) |
| 495 | { |
| 496 | struct mmc_cmdq_req *cmdq_req = mrq->cmdq_req; |
| 497 | u32 req_flags = cmdq_req->cmdq_req_flags; |
| 498 | |
| 499 | pr_debug("%s: %s: data-tag: 0x%08x - dir: %d - prio: %d - cnt: 0x%08x - addr: 0x%llx\n", |
| 500 | mmc_hostname(mrq->host), __func__, |
| 501 | !!(req_flags & DAT_TAG), !!(req_flags & DIR), |
| 502 | !!(req_flags & PRIO), cmdq_req->data.blocks, |
| 503 | (u64)mrq->cmdq_req->blk_addr); |
| 504 | |
| 505 | *data = VALID(1) | |
| 506 | END(1) | |
| 507 | INT(intr) | |
| 508 | ACT(0x5) | |
| 509 | FORCED_PROG(!!(req_flags & FORCED_PRG)) | |
| 510 | CONTEXT(mrq->cmdq_req->ctx_id) | |
| 511 | DATA_TAG(!!(req_flags & DAT_TAG)) | |
| 512 | DATA_DIR(!!(req_flags & DIR)) | |
| 513 | PRIORITY(!!(req_flags & PRIO)) | |
| 514 | QBAR(qbr) | |
| 515 | REL_WRITE(!!(req_flags & REL_WR)) | |
| 516 | BLK_COUNT(mrq->cmdq_req->data.blocks) | |
| 517 | BLK_ADDR((u64)mrq->cmdq_req->blk_addr); |
| 518 | } |
| 519 | |
| 520 | static int cmdq_dma_map(struct mmc_host *host, struct mmc_request *mrq) |
| 521 | { |
| 522 | int sg_count; |
| 523 | struct mmc_data *data = mrq->data; |
| 524 | |
| 525 | if (!data) |
| 526 | return -EINVAL; |
| 527 | |
| 528 | sg_count = dma_map_sg(mmc_dev(host), data->sg, |
| 529 | data->sg_len, |
| 530 | (data->flags & MMC_DATA_WRITE) ? |
| 531 | DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 532 | if (!sg_count) { |
| 533 | pr_err("%s: sg-len: %d\n", __func__, data->sg_len); |
| 534 | return -ENOMEM; |
| 535 | } |
| 536 | |
| 537 | return sg_count; |
| 538 | } |
| 539 | |
Sahitya Tummala | 78a68e5 | 2015-09-30 15:55:41 +0530 | [diff] [blame] | 540 | static void cmdq_set_tran_desc(u8 *desc, dma_addr_t addr, int len, |
| 541 | bool end, bool is_dma64) |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 542 | { |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 543 | __le32 *attr = (__le32 __force *)desc; |
| 544 | |
| 545 | *attr = (VALID(1) | |
| 546 | END(end ? 1 : 0) | |
| 547 | INT(0) | |
| 548 | ACT(0x4) | |
| 549 | DAT_LENGTH(len)); |
| 550 | |
Sahitya Tummala | 78a68e5 | 2015-09-30 15:55:41 +0530 | [diff] [blame] | 551 | if (is_dma64) { |
| 552 | __le64 *dataddr = (__le64 __force *)(desc + 4); |
| 553 | |
| 554 | dataddr[0] = cpu_to_le64(addr); |
| 555 | } else { |
| 556 | __le32 *dataddr = (__le32 __force *)(desc + 4); |
| 557 | |
| 558 | dataddr[0] = cpu_to_le32(addr); |
| 559 | } |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | static int cmdq_prep_tran_desc(struct mmc_request *mrq, |
| 563 | struct cmdq_host *cq_host, int tag) |
| 564 | { |
| 565 | struct mmc_data *data = mrq->data; |
| 566 | int i, sg_count, len; |
| 567 | bool end = false; |
| 568 | dma_addr_t addr; |
| 569 | u8 *desc; |
| 570 | struct scatterlist *sg; |
| 571 | |
| 572 | sg_count = cmdq_dma_map(mrq->host, mrq); |
| 573 | if (sg_count < 0) { |
| 574 | pr_err("%s: %s: unable to map sg lists, %d\n", |
| 575 | mmc_hostname(mrq->host), __func__, sg_count); |
| 576 | return sg_count; |
| 577 | } |
| 578 | |
| 579 | desc = get_trans_desc(cq_host, tag); |
| 580 | memset(desc, 0, cq_host->trans_desc_len * cq_host->mmc->max_segs); |
| 581 | |
| 582 | for_each_sg(data->sg, sg, sg_count, i) { |
| 583 | addr = sg_dma_address(sg); |
| 584 | len = sg_dma_len(sg); |
| 585 | |
| 586 | if ((i+1) == sg_count) |
| 587 | end = true; |
Sahitya Tummala | 78a68e5 | 2015-09-30 15:55:41 +0530 | [diff] [blame] | 588 | cmdq_set_tran_desc(desc, addr, len, end, cq_host->dma64); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 589 | desc += cq_host->trans_desc_len; |
| 590 | } |
| 591 | |
| 592 | pr_debug("%s: req: 0x%p tag: %d calc_trans_des: 0x%p sg-cnt: %d\n", |
| 593 | __func__, mrq->req, tag, desc, sg_count); |
| 594 | |
| 595 | return 0; |
| 596 | } |
| 597 | |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 598 | static void cmdq_log_task_desc_history(struct cmdq_host *cq_host, u64 task, |
| 599 | bool is_dcmd) |
| 600 | { |
| 601 | if (likely(!cq_host->mmc->cmdq_thist_enabled)) |
| 602 | return; |
| 603 | |
| 604 | if (!cq_host->thist) { |
| 605 | pr_err("%s: %s: CMDQ task history buffer not allocated\n", |
| 606 | mmc_hostname(cq_host->mmc), __func__); |
| 607 | return; |
| 608 | } |
| 609 | |
| 610 | if (cq_host->thist_idx >= cq_host->num_slots) |
| 611 | cq_host->thist_idx = 0; |
| 612 | |
| 613 | cq_host->thist[cq_host->thist_idx].is_dcmd = is_dcmd; |
| 614 | memcpy(&cq_host->thist[cq_host->thist_idx++].task, |
| 615 | &task, cq_host->task_desc_len); |
| 616 | } |
| 617 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 618 | static void cmdq_prep_dcmd_desc(struct mmc_host *mmc, |
| 619 | struct mmc_request *mrq) |
| 620 | { |
| 621 | u64 *task_desc = NULL; |
| 622 | u64 data = 0; |
| 623 | u8 resp_type; |
| 624 | u8 *desc; |
| 625 | __le64 *dataddr; |
| 626 | struct cmdq_host *cq_host = mmc_cmdq_private(mmc); |
| 627 | u8 timing; |
| 628 | |
| 629 | if (!(mrq->cmd->flags & MMC_RSP_PRESENT)) { |
| 630 | resp_type = 0x0; |
| 631 | timing = 0x1; |
| 632 | } else { |
Sahitya Tummala | 72bd840 | 2015-05-29 13:27:38 +0530 | [diff] [blame] | 633 | if (mrq->cmd->flags & MMC_RSP_BUSY) { |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 634 | resp_type = 0x3; |
| 635 | timing = 0x0; |
| 636 | } else { |
| 637 | resp_type = 0x2; |
| 638 | timing = 0x1; |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | task_desc = (__le64 __force *)get_desc(cq_host, cq_host->dcmd_slot); |
| 643 | memset(task_desc, 0, cq_host->task_desc_len); |
| 644 | data |= (VALID(1) | |
| 645 | END(1) | |
| 646 | INT(1) | |
| 647 | QBAR(1) | |
| 648 | ACT(0x5) | |
| 649 | CMD_INDEX(mrq->cmd->opcode) | |
| 650 | CMD_TIMING(timing) | RESP_TYPE(resp_type)); |
| 651 | *task_desc |= data; |
| 652 | desc = (u8 *)task_desc; |
| 653 | pr_debug("cmdq: dcmd: cmd: %d timing: %d resp: %d\n", |
| 654 | mrq->cmd->opcode, timing, resp_type); |
| 655 | dataddr = (__le64 __force *)(desc + 4); |
| 656 | dataddr[0] = cpu_to_le64((u64)mrq->cmd->arg); |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 657 | cmdq_log_task_desc_history(cq_host, *task_desc, true); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 658 | } |
| 659 | |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 660 | static void cmdq_pm_qos_vote(struct sdhci_host *host, struct mmc_request *mrq) |
| 661 | { |
| 662 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 663 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 664 | |
| 665 | sdhci_msm_pm_qos_cpu_vote(host, |
| 666 | msm_host->pdata->pm_qos_data.cmdq_latency, mrq->req->cpu); |
| 667 | } |
| 668 | |
| 669 | static void cmdq_pm_qos_unvote(struct sdhci_host *host, struct mmc_request *mrq) |
| 670 | { |
| 671 | /* use async as we're inside an atomic context (soft-irq) */ |
| 672 | sdhci_msm_pm_qos_cpu_unvote(host, mrq->req->cpu, true); |
| 673 | } |
| 674 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 675 | static int cmdq_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 676 | { |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 677 | int err = 0; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 678 | u64 data = 0; |
| 679 | u64 *task_desc = NULL; |
| 680 | u32 tag = mrq->cmdq_req->tag; |
| 681 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 682 | struct sdhci_host *host = mmc_priv(mmc); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 683 | |
| 684 | if (!cq_host->enabled) { |
| 685 | pr_err("%s: CMDQ host not enabled yet !!!\n", |
| 686 | mmc_hostname(mmc)); |
| 687 | err = -EINVAL; |
| 688 | goto out; |
| 689 | } |
| 690 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 691 | cmdq_runtime_pm_get(cq_host); |
| 692 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 693 | if (mrq->cmdq_req->cmdq_req_flags & DCMD) { |
| 694 | cmdq_prep_dcmd_desc(mmc, mrq); |
| 695 | cq_host->mrq_slot[DCMD_SLOT] = mrq; |
Venkat Gopalakrishnan | f1329ce | 2015-08-10 14:55:23 -0700 | [diff] [blame] | 696 | /* DCMD's are always issued on a fixed slot */ |
| 697 | tag = DCMD_SLOT; |
| 698 | goto ring_doorbell; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | task_desc = (__le64 __force *)get_desc(cq_host, tag); |
| 702 | |
| 703 | cmdq_prep_task_desc(mrq, &data, 1, |
| 704 | (mrq->cmdq_req->cmdq_req_flags & QBR)); |
| 705 | *task_desc = cpu_to_le64(data); |
Venkat Gopalakrishnan | e77c64d | 2015-09-28 18:53:18 -0700 | [diff] [blame] | 706 | cmdq_log_task_desc_history(cq_host, *task_desc, false); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 707 | |
| 708 | err = cmdq_prep_tran_desc(mrq, cq_host, tag); |
| 709 | if (err) { |
| 710 | pr_err("%s: %s: failed to setup tx desc: %d\n", |
| 711 | mmc_hostname(mmc), __func__, err); |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 712 | goto out; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 713 | } |
| 714 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 715 | cq_host->mrq_slot[tag] = mrq; |
| 716 | if (cq_host->ops->set_tranfer_params) |
| 717 | cq_host->ops->set_tranfer_params(mmc); |
| 718 | |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 719 | /* PM QoS */ |
| 720 | sdhci_msm_pm_qos_irq_vote(host); |
| 721 | cmdq_pm_qos_vote(host, mrq); |
Venkat Gopalakrishnan | f1329ce | 2015-08-10 14:55:23 -0700 | [diff] [blame] | 722 | ring_doorbell: |
| 723 | /* Ensure the task descriptor list is flushed before ringing doorbell */ |
| 724 | wmb(); |
Venkat Gopalakrishnan | 7d53e83 | 2015-10-01 14:34:10 -0700 | [diff] [blame] | 725 | if (cmdq_readl(cq_host, CQTDBR) & (1 << tag)) { |
| 726 | cmdq_dumpregs(cq_host); |
| 727 | BUG_ON(1); |
| 728 | } |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 729 | cmdq_writel(cq_host, 1 << tag, CQTDBR); |
Venkat Gopalakrishnan | f1329ce | 2015-08-10 14:55:23 -0700 | [diff] [blame] | 730 | /* Commit the doorbell write immediately */ |
| 731 | wmb(); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 732 | |
| 733 | out: |
| 734 | return err; |
| 735 | } |
| 736 | |
| 737 | static void cmdq_finish_data(struct mmc_host *mmc, unsigned int tag) |
| 738 | { |
| 739 | struct mmc_request *mrq; |
| 740 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
| 741 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 742 | mrq = get_req_by_tag(cq_host, tag); |
Sahitya Tummala | 9549d56 | 2015-05-29 15:41:18 +0530 | [diff] [blame] | 743 | if (tag == cq_host->dcmd_slot) |
| 744 | mrq->cmd->resp[0] = cmdq_readl(cq_host, CQCRDCT); |
| 745 | |
Asutosh Das | c0ed9c4 | 2015-05-29 15:39:37 +0530 | [diff] [blame] | 746 | if (mrq->cmdq_req->cmdq_req_flags & DCMD) |
| 747 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQ_VENDOR_CFG) | |
Sahitya Tummala | b9ed561 | 2015-10-05 16:20:10 +0530 | [diff] [blame] | 748 | CMDQ_SEND_STATUS_TRIGGER, CQ_VENDOR_CFG); |
Konstantin Dorfman | 27af9a9 | 2015-08-02 17:06:18 +0300 | [diff] [blame] | 749 | |
| 750 | cmdq_runtime_pm_put(cq_host); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 751 | mrq->done(mrq); |
| 752 | } |
| 753 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 754 | irqreturn_t cmdq_irq(struct mmc_host *mmc, int err) |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 755 | { |
| 756 | u32 status; |
| 757 | unsigned long tag = 0, comp_status; |
| 758 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 759 | unsigned long err_info = 0; |
| 760 | struct mmc_request *mrq; |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 761 | int ret; |
Ritesh Harjani | 6217c04 | 2015-10-01 20:34:42 +0530 | [diff] [blame] | 762 | u32 dbr_set = 0; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 763 | |
| 764 | status = cmdq_readl(cq_host, CQIS); |
| 765 | cmdq_writel(cq_host, status, CQIS); |
| 766 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 767 | if (!status && !err) |
| 768 | return IRQ_NONE; |
| 769 | |
| 770 | if (err || (status & CQIS_RED)) { |
| 771 | err_info = cmdq_readl(cq_host, CQTERRI); |
| 772 | pr_err("%s: err: %d status: 0x%08x task-err-info (0x%08lx)\n", |
| 773 | mmc_hostname(mmc), err, status, err_info); |
| 774 | |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 775 | /* |
| 776 | * Need to halt CQE in case of error in interrupt context itself |
| 777 | * otherwise CQE may proceed with sending CMD to device even if |
| 778 | * CQE/card is in error state. |
| 779 | * CMDQ error handling will make sure that it is unhalted after |
| 780 | * handling all the errors. |
| 781 | */ |
| 782 | ret = cmdq_halt_poll(mmc); |
| 783 | if (ret) |
| 784 | pr_err("%s: %s: halt failed ret=%d\n", |
| 785 | mmc_hostname(mmc), __func__, ret); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 786 | cmdq_dumpregs(cq_host); |
| 787 | |
Ritesh Harjani | 6217c04 | 2015-10-01 20:34:42 +0530 | [diff] [blame] | 788 | if (!err_info) { |
| 789 | /* |
| 790 | * It may so happen sometimes for few errors(like ADMA) |
| 791 | * that HW cannot give CQTERRI info. |
| 792 | * Thus below is a HW WA for recovering from such |
| 793 | * scenario. |
| 794 | * - To halt/disable CQE and do reset_all. |
| 795 | * Since there is no way to know which tag would |
| 796 | * have caused such error, so check for any first |
| 797 | * bit set in doorbell and proceed with an error. |
| 798 | */ |
| 799 | dbr_set = cmdq_readl(cq_host, CQTDBR); |
| 800 | if (!dbr_set) { |
| 801 | pr_err("%s: spurious/force error interrupt\n", |
| 802 | mmc_hostname(mmc)); |
| 803 | cmdq_halt(mmc, false); |
| 804 | mmc_host_clr_halt(mmc); |
| 805 | return IRQ_HANDLED; |
| 806 | } |
| 807 | |
| 808 | tag = ffs(dbr_set) - 1; |
| 809 | pr_err("%s: error tag selected: tag = %lu\n", |
| 810 | mmc_hostname(mmc), tag); |
| 811 | mrq = get_req_by_tag(cq_host, tag); |
| 812 | if (mrq->data) |
| 813 | mrq->data->error = err; |
| 814 | else |
| 815 | mrq->cmd->error = err; |
| 816 | /* |
| 817 | * Get ADMA descriptor memory in case of ADMA |
| 818 | * error for debug. |
| 819 | */ |
| 820 | if (err == -EIO) |
| 821 | cmdq_dump_adma_mem(cq_host); |
| 822 | goto skip_cqterri; |
| 823 | } |
| 824 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 825 | if (err_info & CQ_RMEFV) { |
| 826 | tag = GET_CMD_ERR_TAG(err_info); |
| 827 | pr_err("%s: CMD err tag: %lu\n", __func__, tag); |
| 828 | |
| 829 | mrq = get_req_by_tag(cq_host, tag); |
| 830 | /* CMD44/45/46/47 will not have a valid cmd */ |
| 831 | if (mrq->cmd) |
| 832 | mrq->cmd->error = err; |
| 833 | else |
| 834 | mrq->data->error = err; |
| 835 | } else { |
| 836 | tag = GET_DAT_ERR_TAG(err_info); |
| 837 | pr_err("%s: Dat err tag: %lu\n", __func__, tag); |
| 838 | mrq = get_req_by_tag(cq_host, tag); |
| 839 | mrq->data->error = err; |
| 840 | } |
| 841 | |
Ritesh Harjani | 6217c04 | 2015-10-01 20:34:42 +0530 | [diff] [blame] | 842 | skip_cqterri: |
| 843 | /* |
| 844 | * If CQE halt fails then, disable CQE |
| 845 | * from processing any further requests |
| 846 | */ |
| 847 | if (ret) |
| 848 | cmdq_disable(mmc, true); |
| 849 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 850 | /* |
| 851 | * CQE detected a response error from device |
| 852 | * In most cases, this would require a reset. |
| 853 | */ |
| 854 | if (status & CQIS_RED) { |
Dov Levenglick | 2b67830 | 2015-07-01 14:24:20 +0300 | [diff] [blame] | 855 | /* |
| 856 | * will check if the RED error is due to a bkops |
| 857 | * exception once the queue is empty |
| 858 | */ |
| 859 | BUG_ON(!mmc->card); |
| 860 | if (mmc_card_configured_manual_bkops(mmc->card) && |
| 861 | !mmc_card_configured_auto_bkops(mmc->card)) |
| 862 | mmc->card->bkops.needs_check = true; |
| 863 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 864 | mrq->cmdq_req->resp_err = true; |
| 865 | pr_err("%s: Response error (0x%08x) from card !!!", |
Dov Levenglick | 2b67830 | 2015-07-01 14:24:20 +0300 | [diff] [blame] | 866 | mmc_hostname(mmc), status); |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 867 | } else { |
| 868 | mrq->cmdq_req->resp_idx = cmdq_readl(cq_host, CQCRI); |
| 869 | mrq->cmdq_req->resp_arg = cmdq_readl(cq_host, CQCRA); |
| 870 | } |
| 871 | |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 872 | cmdq_finish_data(mmc, tag); |
| 873 | } |
| 874 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 875 | if (status & CQIS_TCC) { |
Konstantin Dorfman | af1713c | 2015-10-06 13:25:45 +0300 | [diff] [blame] | 876 | /* read CQTCN and complete the request */ |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 877 | comp_status = cmdq_readl(cq_host, CQTCN); |
| 878 | if (!comp_status) |
| 879 | goto out; |
Konstantin Dorfman | af1713c | 2015-10-06 13:25:45 +0300 | [diff] [blame] | 880 | /* |
| 881 | * The CQTCN must be cleared before notifying req completion |
| 882 | * to upper layers to avoid missing completion notification |
| 883 | * of new requests with the same tag. |
| 884 | */ |
| 885 | cmdq_writel(cq_host, comp_status, CQTCN); |
| 886 | /* |
| 887 | * A write memory barrier is necessary to guarantee that CQTCN |
| 888 | * gets cleared first before next doorbell for the same tag is |
| 889 | * set but that is already achieved by the barrier present |
| 890 | * before setting doorbell, hence one is not needed here. |
| 891 | */ |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 892 | for_each_set_bit(tag, &comp_status, cq_host->num_slots) { |
| 893 | /* complete the corresponding mrq */ |
| 894 | pr_debug("%s: completing tag -> %lu\n", |
| 895 | mmc_hostname(mmc), tag); |
| 896 | cmdq_finish_data(mmc, tag); |
| 897 | } |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 898 | } |
| 899 | |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 900 | if (status & CQIS_HAC) { |
Konstantin Dorfman | fa32107 | 2015-05-31 10:10:13 +0300 | [diff] [blame] | 901 | if (cq_host->ops->post_cqe_halt) |
| 902 | cq_host->ops->post_cqe_halt(mmc); |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 903 | /* halt is completed, wakeup waiting thread */ |
| 904 | complete(&cq_host->halt_comp); |
| 905 | } |
| 906 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 907 | out: |
| 908 | return IRQ_HANDLED; |
| 909 | } |
| 910 | EXPORT_SYMBOL(cmdq_irq); |
| 911 | |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 912 | /* cmdq_halt_poll - Halting CQE using polling method. |
| 913 | * @mmc: struct mmc_host |
| 914 | * This is used mainly from interrupt context to halt |
| 915 | * CQE engine. |
| 916 | */ |
| 917 | static int cmdq_halt_poll(struct mmc_host *mmc) |
| 918 | { |
| 919 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
| 920 | int retries = 100; |
| 921 | |
| 922 | cmdq_set_halt_irq(cq_host, false); |
| 923 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQCTL) | HALT, CQCTL); |
| 924 | while (retries) { |
| 925 | if (!(cmdq_readl(cq_host, CQCTL) & HALT)) { |
| 926 | udelay(5); |
| 927 | retries--; |
| 928 | continue; |
| 929 | } else { |
| 930 | if (cq_host->ops->post_cqe_halt) |
| 931 | cq_host->ops->post_cqe_halt(mmc); |
| 932 | /* halt done: re-enable legacy interrupts */ |
| 933 | if (cq_host->ops->clear_set_irqs) |
| 934 | cq_host->ops->clear_set_irqs(mmc, |
| 935 | false); |
| 936 | mmc_host_set_halt(mmc); |
| 937 | break; |
| 938 | } |
| 939 | } |
| 940 | cmdq_set_halt_irq(cq_host, true); |
| 941 | return retries ? 0 : -ETIMEDOUT; |
| 942 | } |
| 943 | |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 944 | /* May sleep */ |
| 945 | static int cmdq_halt(struct mmc_host *mmc, bool halt) |
| 946 | { |
| 947 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 948 | u32 ret = 0; |
Ritesh Harjani | 442c60a | 2015-09-15 19:21:32 +0530 | [diff] [blame] | 949 | int retries = 3; |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 950 | |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 951 | cmdq_runtime_pm_get(cq_host); |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 952 | if (halt) { |
Ritesh Harjani | 442c60a | 2015-09-15 19:21:32 +0530 | [diff] [blame] | 953 | while (retries) { |
| 954 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQCTL) | HALT, |
| 955 | CQCTL); |
| 956 | ret = wait_for_completion_timeout(&cq_host->halt_comp, |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 957 | msecs_to_jiffies(HALT_TIMEOUT_MS)); |
Ritesh Harjani | 442c60a | 2015-09-15 19:21:32 +0530 | [diff] [blame] | 958 | if (!ret && !(cmdq_readl(cq_host, CQCTL) & HALT)) { |
| 959 | retries--; |
| 960 | continue; |
| 961 | } else { |
| 962 | /* halt done: re-enable legacy interrupts */ |
| 963 | if (cq_host->ops->clear_set_irqs) |
| 964 | cq_host->ops->clear_set_irqs(mmc, |
| 965 | false); |
| 966 | break; |
| 967 | } |
| 968 | } |
Subhash Jadavani | 6a718e1 | 2015-10-19 17:25:22 -0700 | [diff] [blame] | 969 | ret = retries ? 0 : -ETIMEDOUT; |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 970 | } else { |
Asutosh Das | 3f730d1 | 2015-07-08 11:41:35 +0530 | [diff] [blame] | 971 | if (cq_host->ops->set_data_timeout) |
| 972 | cq_host->ops->set_data_timeout(mmc, 0xf); |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 973 | if (cq_host->ops->clear_set_irqs) |
| 974 | cq_host->ops->clear_set_irqs(mmc, true); |
| 975 | cmdq_writel(cq_host, cmdq_readl(cq_host, CQCTL) & ~HALT, |
| 976 | CQCTL); |
| 977 | } |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 978 | cmdq_runtime_pm_put(cq_host); |
| 979 | return ret; |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 980 | } |
| 981 | |
Ritesh Harjani | 121cdec | 2015-09-27 21:51:01 +0530 | [diff] [blame] | 982 | static void cmdq_post_req(struct mmc_host *mmc, int tag, int err) |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 983 | { |
Ritesh Harjani | 121cdec | 2015-09-27 21:51:01 +0530 | [diff] [blame] | 984 | struct cmdq_host *cq_host; |
| 985 | struct mmc_request *mrq; |
| 986 | struct mmc_data *data; |
| 987 | struct sdhci_host *sdhci_host = mmc_priv(mmc); |
| 988 | |
| 989 | if (WARN_ON(!mmc)) |
| 990 | return; |
| 991 | |
| 992 | cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
| 993 | mrq = get_req_by_tag(cq_host, tag); |
| 994 | data = mrq->data; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 995 | |
| 996 | if (data) { |
| 997 | data->error = err; |
Ritesh Harjani | 121cdec | 2015-09-27 21:51:01 +0530 | [diff] [blame] | 998 | dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len, |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 999 | (data->flags & MMC_DATA_READ) ? |
| 1000 | DMA_FROM_DEVICE : DMA_TO_DEVICE); |
| 1001 | if (err) |
| 1002 | data->bytes_xfered = 0; |
| 1003 | else |
| 1004 | data->bytes_xfered = blk_rq_bytes(mrq->req); |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 1005 | |
| 1006 | /* we're in atomic context (soft-irq) so unvote async. */ |
| 1007 | sdhci_msm_pm_qos_irq_unvote(sdhci_host, true); |
| 1008 | cmdq_pm_qos_unvote(sdhci_host, mrq); |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1009 | } |
| 1010 | } |
| 1011 | |
Asutosh Das | fa8836b | 2015-03-02 23:14:05 +0530 | [diff] [blame] | 1012 | static void cmdq_dumpstate(struct mmc_host *mmc) |
| 1013 | { |
| 1014 | struct cmdq_host *cq_host = (struct cmdq_host *)mmc_cmdq_private(mmc); |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 1015 | cmdq_runtime_pm_get(cq_host); |
Asutosh Das | fa8836b | 2015-03-02 23:14:05 +0530 | [diff] [blame] | 1016 | cmdq_dumpregs(cq_host); |
Konstantin Dorfman | 4d40cf2 | 2015-06-11 11:41:53 +0300 | [diff] [blame] | 1017 | cmdq_runtime_pm_put(cq_host); |
Asutosh Das | fa8836b | 2015-03-02 23:14:05 +0530 | [diff] [blame] | 1018 | } |
| 1019 | |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 1020 | static int cmdq_late_init(struct mmc_host *mmc) |
| 1021 | { |
| 1022 | struct sdhci_host *host = mmc_priv(mmc); |
| 1023 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 1024 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 1025 | |
| 1026 | /* |
| 1027 | * TODO: This should basically move to something like "sdhci-cmdq-msm" |
| 1028 | * for msm specific implementation. |
| 1029 | */ |
| 1030 | sdhci_msm_pm_qos_irq_init(host); |
| 1031 | |
| 1032 | if (msm_host->pdata->pm_qos_data.cmdq_valid) |
| 1033 | sdhci_msm_pm_qos_cpu_init(host, |
| 1034 | msm_host->pdata->pm_qos_data.cmdq_latency); |
| 1035 | return 0; |
| 1036 | } |
| 1037 | |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1038 | static const struct mmc_cmdq_host_ops cmdq_host_ops = { |
Gilad Broner | 4444599 | 2015-09-29 16:05:39 +0300 | [diff] [blame] | 1039 | .init = cmdq_late_init, |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1040 | .enable = cmdq_enable, |
| 1041 | .disable = cmdq_disable, |
| 1042 | .request = cmdq_request, |
| 1043 | .post_req = cmdq_post_req, |
Asutosh Das | aa1e1c7 | 2015-05-21 17:22:10 +0530 | [diff] [blame] | 1044 | .halt = cmdq_halt, |
Asutosh Das | 02e3086 | 2015-05-20 16:52:04 +0530 | [diff] [blame] | 1045 | .reset = cmdq_reset, |
Asutosh Das | fa8836b | 2015-03-02 23:14:05 +0530 | [diff] [blame] | 1046 | .dumpstate = cmdq_dumpstate, |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1047 | }; |
| 1048 | |
| 1049 | struct cmdq_host *cmdq_pltfm_init(struct platform_device *pdev) |
| 1050 | { |
| 1051 | struct cmdq_host *cq_host; |
| 1052 | struct resource *cmdq_memres = NULL; |
| 1053 | |
| 1054 | /* check and setup CMDQ interface */ |
| 1055 | cmdq_memres = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 1056 | "cmdq_mem"); |
| 1057 | if (!cmdq_memres) { |
| 1058 | dev_dbg(&pdev->dev, "CMDQ not supported\n"); |
| 1059 | return ERR_PTR(-EINVAL); |
| 1060 | } |
| 1061 | |
| 1062 | cq_host = kzalloc(sizeof(*cq_host), GFP_KERNEL); |
| 1063 | if (!cq_host) { |
| 1064 | dev_err(&pdev->dev, "failed to allocate memory for CMDQ\n"); |
| 1065 | return ERR_PTR(-ENOMEM); |
| 1066 | } |
| 1067 | cq_host->mmio = devm_ioremap(&pdev->dev, |
| 1068 | cmdq_memres->start, |
| 1069 | resource_size(cmdq_memres)); |
| 1070 | if (!cq_host->mmio) { |
| 1071 | dev_err(&pdev->dev, "failed to remap cmdq regs\n"); |
| 1072 | kfree(cq_host); |
| 1073 | return ERR_PTR(-EBUSY); |
| 1074 | } |
| 1075 | dev_dbg(&pdev->dev, "CMDQ ioremap: done\n"); |
| 1076 | |
| 1077 | return cq_host; |
| 1078 | } |
| 1079 | EXPORT_SYMBOL(cmdq_pltfm_init); |
| 1080 | |
| 1081 | int cmdq_init(struct cmdq_host *cq_host, struct mmc_host *mmc, |
| 1082 | bool dma64) |
| 1083 | { |
| 1084 | int err = 0; |
| 1085 | |
| 1086 | cq_host->dma64 = dma64; |
| 1087 | cq_host->mmc = mmc; |
| 1088 | cq_host->mmc->cmdq_private = cq_host; |
| 1089 | |
| 1090 | cq_host->num_slots = NUM_SLOTS; |
| 1091 | cq_host->dcmd_slot = DCMD_SLOT; |
| 1092 | |
| 1093 | mmc->cmdq_ops = &cmdq_host_ops; |
Ritesh Harjani | b0280c2 | 2015-10-27 11:51:25 +0530 | [diff] [blame] | 1094 | mmc->num_cq_slots = NUM_SLOTS; |
| 1095 | mmc->dcmd_cq_slot = DCMD_SLOT; |
Venkat Gopalakrishnan | 0225ff9 | 2015-05-29 17:25:46 -0700 | [diff] [blame] | 1096 | |
| 1097 | cq_host->mrq_slot = kzalloc(sizeof(cq_host->mrq_slot) * |
| 1098 | cq_host->num_slots, GFP_KERNEL); |
| 1099 | if (!cq_host->mrq_slot) |
| 1100 | return -ENOMEM; |
| 1101 | |
| 1102 | init_completion(&cq_host->halt_comp); |
| 1103 | return err; |
| 1104 | } |
| 1105 | EXPORT_SYMBOL(cmdq_init); |