1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * PX mmu initialization and configuration 30 */ 31 #include <sys/types.h> 32 #include <sys/kmem.h> 33 #include <sys/async.h> 34 #include <sys/sysmacros.h> 35 #include <sys/sunddi.h> 36 #include <sys/ddi_impldefs.h> 37 #include <sys/vmem.h> 38 #include <sys/machsystm.h> /* lddphys() */ 39 #include <sys/iommutsb.h> 40 #include "px_obj.h" 41 42 int 43 px_mmu_attach(px_t *px_p) 44 { 45 dev_info_t *dip = px_p->px_dip; 46 px_mmu_t *mmu_p; 47 uint32_t tsb_i = 0; 48 char map_name[32]; 49 px_dvma_range_prop_t *dvma_prop; 50 int dvma_prop_len; 51 uint32_t cache_size, tsb_entries; 52 53 /* 54 * Allocate mmu state structure and link it to the 55 * px state structure. 56 */ 57 mmu_p = kmem_zalloc(sizeof (px_mmu_t), KM_SLEEP); 58 if (mmu_p == NULL) 59 return (DDI_FAILURE); 60 61 px_p->px_mmu_p = mmu_p; 62 mmu_p->mmu_px_p = px_p; 63 mmu_p->mmu_inst = ddi_get_instance(dip); 64 65 /* 66 * Check for "virtual-dma" property that specifies 67 * the DVMA range. 68 */ 69 if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 70 "virtual-dma", (caddr_t)&dvma_prop, &dvma_prop_len) != 71 DDI_PROP_SUCCESS) { 72 73 DBG(DBG_ATTACH, dip, "Getting virtual-dma failed\n"); 74 75 kmem_free(mmu_p, sizeof (px_mmu_t)); 76 px_p->px_mmu_p = NULL; 77 78 return (DDI_FAILURE); 79 } 80 81 mmu_p->mmu_dvma_base = dvma_prop->dvma_base; 82 mmu_p->mmu_dvma_end = dvma_prop->dvma_base + 83 (dvma_prop->dvma_len - 1); 84 tsb_entries = MMU_BTOP(dvma_prop->dvma_len); 85 86 kmem_free(dvma_prop, dvma_prop_len); 87 88 /* 89 * Setup base and bounds for DVMA and bypass mappings. 90 */ 91 mmu_p->mmu_dvma_cache_locks = 92 kmem_zalloc(px_dvma_page_cache_entries, KM_SLEEP); 93 94 mmu_p->dvma_base_pg = MMU_BTOP(mmu_p->mmu_dvma_base); 95 mmu_p->mmu_dvma_reserve = tsb_entries >> 1; 96 mmu_p->dvma_end_pg = MMU_BTOP(mmu_p->mmu_dvma_end); 97 98 /* 99 * Create a virtual memory map for dvma address space. 100 * Reserve 'size' bytes of low dvma space for fast track cache. 101 */ 102 (void) snprintf(map_name, sizeof (map_name), "%s%d_dvma", 103 ddi_driver_name(dip), ddi_get_instance(dip)); 104 105 cache_size = MMU_PTOB(px_dvma_page_cache_entries * 106 px_dvma_page_cache_clustsz); 107 mmu_p->mmu_dvma_fast_end = mmu_p->mmu_dvma_base + 108 cache_size - 1; 109 110 mmu_p->mmu_dvma_map = vmem_create(map_name, 111 (void *)(mmu_p->mmu_dvma_fast_end + 1), 112 MMU_PTOB(tsb_entries) - cache_size, MMU_PAGE_SIZE, 113 NULL, NULL, NULL, MMU_PAGE_SIZE, VM_SLEEP); 114 115 mutex_init(&mmu_p->dvma_debug_lock, NULL, MUTEX_DRIVER, NULL); 116 117 for (tsb_i = 0; tsb_i < tsb_entries; tsb_i++) { 118 r_addr_t ra = 0; 119 io_attributes_t attr; 120 caddr_t va; 121 122 if (px_lib_iommu_getmap(px_p->px_dip, PCI_TSBID(0, tsb_i), 123 &attr, &ra) != DDI_SUCCESS) 124 continue; 125 126 va = (caddr_t)(MMU_PTOB(mmu_p->dvma_base_pg + tsb_i)); 127 128 if (va <= (caddr_t)mmu_p->mmu_dvma_fast_end) { 129 uint32_t cache_i; 130 131 /* 132 * the va is within the *fast* dvma range; therefore, 133 * lock its fast dvma page cache cluster in order to 134 * both preserve the TTE and prevent the use of this 135 * fast dvma page cache cluster by px_dvma_map_fast(). 136 * the lock value 0xFF comes from ldstub(). 137 */ 138 cache_i = tsb_i / px_dvma_page_cache_clustsz; 139 ASSERT(cache_i < px_dvma_page_cache_entries); 140 mmu_p->mmu_dvma_cache_locks[cache_i] = 0xFF; 141 } else { 142 (void) vmem_xalloc(mmu_p->mmu_dvma_map, MMU_PAGE_SIZE, 143 MMU_PAGE_SIZE, 0, 0, va, va + MMU_PAGE_SIZE, 144 VM_NOSLEEP | VM_BESTFIT | VM_PANIC); 145 } 146 } 147 148 return (DDI_SUCCESS); 149 } 150 151 void 152 px_mmu_detach(px_t *px_p) 153 { 154 px_mmu_t *mmu_p = px_p->px_mmu_p; 155 156 /* 157 * Free the dvma resource map. 158 */ 159 vmem_destroy(mmu_p->mmu_dvma_map); 160 161 kmem_free(mmu_p->mmu_dvma_cache_locks, 162 px_dvma_page_cache_entries); 163 164 if (PX_DVMA_DBG_ON(mmu_p)) 165 px_dvma_debug_fini(mmu_p); 166 167 mutex_destroy(&mmu_p->dvma_debug_lock); 168 169 /* 170 * Free the mmu state structure. 171 */ 172 kmem_free(mmu_p, sizeof (px_mmu_t)); 173 px_p->px_mmu_p = NULL; 174 } 175 176 int 177 px_mmu_map_pages(px_mmu_t *mmu_p, ddi_dma_impl_t *mp, px_dvma_addr_t dvma_pg, 178 size_t npages, size_t pfn_index) 179 { 180 dev_info_t *dip = mmu_p->mmu_px_p->px_dip; 181 px_dvma_addr_t pg_index = MMU_PAGE_INDEX(mmu_p, dvma_pg); 182 io_attributes_t attr = PX_GET_MP_TTE(mp->dmai_tte); 183 184 ASSERT(npages <= mp->dmai_ndvmapages); 185 DBG(DBG_MAP_WIN, dip, "px_mmu_map_pages:%x+%x=%x " 186 "npages=0x%x pfn_index=0x%x\n", (uint_t)mmu_p->dvma_base_pg, 187 (uint_t)pg_index, dvma_pg, (uint_t)npages, (uint_t)pfn_index); 188 189 if (px_lib_iommu_map(dip, PCI_TSBID(0, pg_index), npages, 190 PX_ADD_ATTR_EXTNS(attr, mp->dmai_bdf), (void *)mp, pfn_index, 191 MMU_MAP_PFN) != DDI_SUCCESS) { 192 DBG(DBG_MAP_WIN, dip, "px_mmu_map_pages: " 193 "px_lib_iommu_map failed\n"); 194 195 return (DDI_FAILURE); 196 } 197 198 if (!PX_MAP_BUFZONE(mp)) 199 goto done; 200 201 DBG(DBG_MAP_WIN, dip, "px_mmu_map_pages: redzone pg=%x\n", 202 pg_index + npages); 203 204 ASSERT(PX_HAS_REDZONE(mp)); 205 206 if (px_lib_iommu_map(dip, PCI_TSBID(0, pg_index + npages), 1, 207 PX_ADD_ATTR_EXTNS(attr, mp->dmai_bdf), (void *)mp, 208 pfn_index + npages - 1, MMU_MAP_PFN) != DDI_SUCCESS) { 209 DBG(DBG_MAP_WIN, dip, "px_mmu_map_pages: mapping " 210 "REDZONE page failed\n"); 211 212 (void) px_lib_iommu_demap(dip, PCI_TSBID(0, pg_index), npages); 213 return (DDI_FAILURE); 214 } 215 216 done: 217 if (PX_DVMA_DBG_ON(mmu_p)) 218 px_dvma_alloc_debug(mmu_p, (char *)mp->dmai_mapping, 219 mp->dmai_size, mp); 220 221 return (DDI_SUCCESS); 222 } 223 224 void 225 px_mmu_unmap_pages(px_mmu_t *mmu_p, ddi_dma_impl_t *mp, px_dvma_addr_t dvma_pg, 226 uint_t npages) 227 { 228 px_dvma_addr_t pg_index = MMU_PAGE_INDEX(mmu_p, dvma_pg); 229 230 DBG(DBG_UNMAP_WIN, mmu_p->mmu_px_p->px_dip, 231 "px_mmu_unmap_pages:%x+%x=%x npages=0x%x\n", 232 (uint_t)mmu_p->dvma_base_pg, (uint_t)pg_index, dvma_pg, 233 (uint_t)npages); 234 235 (void) px_lib_iommu_demap(mmu_p->mmu_px_p->px_dip, 236 PCI_TSBID(0, pg_index), npages); 237 238 if (!PX_MAP_BUFZONE(mp)) 239 return; 240 241 DBG(DBG_MAP_WIN, mmu_p->mmu_px_p->px_dip, "px_mmu_unmap_pages: " 242 "redzone pg=%x\n", pg_index + npages); 243 244 ASSERT(PX_HAS_REDZONE(mp)); 245 246 (void) px_lib_iommu_demap(mmu_p->mmu_px_p->px_dip, 247 PCI_TSBID(0, pg_index + npages), 1); 248 } 249 250 /* 251 * px_mmu_map_window - map a dvma window into the mmu 252 * used by: px_dma_win(), px_dma_ctlops() - DDI_DMA_MOVWIN, DDI_DMA_NEXTWIN 253 * return value: none 254 */ 255 /*ARGSUSED*/ 256 int 257 px_mmu_map_window(px_mmu_t *mmu_p, ddi_dma_impl_t *mp, px_window_t win_no) 258 { 259 uint32_t obj_pg0_off = mp->dmai_roffset; 260 uint32_t win_pg0_off = win_no ? 0 : obj_pg0_off; 261 size_t win_size = mp->dmai_winsize; 262 size_t pfn_index = win_size * win_no; /* temp value */ 263 size_t obj_off = win_no ? pfn_index - obj_pg0_off : 0; /* xferred sz */ 264 px_dvma_addr_t dvma_pg = MMU_BTOP(mp->dmai_mapping); 265 size_t res_size = mp->dmai_object.dmao_size - obj_off + win_pg0_off; 266 int ret = DDI_SUCCESS; 267 268 ASSERT(!(win_size & MMU_PAGE_OFFSET)); 269 if (win_no >= mp->dmai_nwin) 270 return (ret); 271 if (res_size < win_size) /* last window */ 272 win_size = res_size; /* mp->dmai_winsize unchanged */ 273 274 mp->dmai_mapping = MMU_PTOB(dvma_pg) | win_pg0_off; 275 mp->dmai_size = win_size - win_pg0_off; /* cur win xferrable size */ 276 mp->dmai_offset = obj_off; /* win offset into object */ 277 pfn_index = MMU_BTOP(pfn_index); /* index into pfnlist */ 278 ret = px_mmu_map_pages(mmu_p, mp, dvma_pg, MMU_BTOPR(win_size), 279 pfn_index); 280 281 return (ret); 282 } 283 284 /* 285 * px_mmu_unmap_window 286 * This routine is called to break down the mmu mappings to a dvma window. 287 * Non partial mappings are viewed as single window mapping. 288 * used by: px_dma_unbindhdl(), px_dma_window(), 289 * and px_dma_ctlops() - DDI_DMA_FREE, DDI_DMA_MOVWIN, DDI_DMA_NEXTWIN 290 * return value: none 291 */ 292 /*ARGSUSED*/ 293 void 294 px_mmu_unmap_window(px_mmu_t *mmu_p, ddi_dma_impl_t *mp) 295 { 296 px_dvma_addr_t dvma_pg = MMU_BTOP(mp->dmai_mapping); 297 uint_t npages = MMU_BTOP(mp->dmai_winsize); 298 299 px_mmu_unmap_pages(mmu_p, mp, dvma_pg, npages); 300 301 if (PX_DVMA_DBG_ON(mmu_p)) 302 px_dvma_free_debug(mmu_p, (char *)mp->dmai_mapping, 303 mp->dmai_size, mp); 304 } 305 306 307 #if 0 308 /* 309 * The following table is for reference only. It denotes the 310 * the TSB table size measured in number of 8 byte entries. 311 * It is represented by bits 3:0 in the MMU TSB CTRL REG. 312 */ 313 static int px_mmu_tsb_sizes[] = { 314 0x0, /* 1K */ 315 0x1, /* 2K */ 316 0x2, /* 4K */ 317 0x3, /* 8K */ 318 0x4, /* 16K */ 319 0x5, /* 32K */ 320 0x6, /* 64K */ 321 0x7, /* 128K */ 322 0x8 /* 256K */ 323 }; 324 #endif 325 326 static char *px_mmu_errsts[] = { 327 "Protection Error", "Invalid Error", "Timeout", "ECC Error(UE)" 328 }; 329 330 /*ARGSUSED*/ 331 static int 332 px_log_mmu_err(px_t *px_p) 333 { 334 /* 335 * Place holder, the correct eror bits need tobe logged. 336 */ 337 return (0); 338 } 339