1695093e3SVarun Sethi /* 2695093e3SVarun Sethi * This program is free software; you can redistribute it and/or modify 3695093e3SVarun Sethi * it under the terms of the GNU General Public License, version 2, as 4695093e3SVarun Sethi * published by the Free Software Foundation. 5695093e3SVarun Sethi * 6695093e3SVarun Sethi * This program is distributed in the hope that it will be useful, 7695093e3SVarun Sethi * but WITHOUT ANY WARRANTY; without even the implied warranty of 8695093e3SVarun Sethi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9695093e3SVarun Sethi * GNU General Public License for more details. 10695093e3SVarun Sethi * 11695093e3SVarun Sethi * You should have received a copy of the GNU General Public License 12695093e3SVarun Sethi * along with this program; if not, write to the Free Software 13695093e3SVarun Sethi * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14695093e3SVarun Sethi * 15695093e3SVarun Sethi * Copyright (C) 2013 Freescale Semiconductor, Inc. 16695093e3SVarun Sethi * Author: Varun Sethi <varun.sethi@freescale.com> 17695093e3SVarun Sethi * 18695093e3SVarun Sethi */ 19695093e3SVarun Sethi 20695093e3SVarun Sethi #define pr_fmt(fmt) "fsl-pamu-domain: %s: " fmt, __func__ 21695093e3SVarun Sethi 22695093e3SVarun Sethi #include "fsl_pamu_domain.h" 23695093e3SVarun Sethi 24cd70d465SEmil Medve #include <sysdev/fsl_pci.h> 25cd70d465SEmil Medve 26695093e3SVarun Sethi /* 27695093e3SVarun Sethi * Global spinlock that needs to be held while 28695093e3SVarun Sethi * configuring PAMU. 29695093e3SVarun Sethi */ 30695093e3SVarun Sethi static DEFINE_SPINLOCK(iommu_lock); 31695093e3SVarun Sethi 32695093e3SVarun Sethi static struct kmem_cache *fsl_pamu_domain_cache; 33695093e3SVarun Sethi static struct kmem_cache *iommu_devinfo_cache; 34695093e3SVarun Sethi static DEFINE_SPINLOCK(device_domain_lock); 35695093e3SVarun Sethi 36695093e3SVarun Sethi static int __init iommu_init_mempool(void) 37695093e3SVarun Sethi { 38695093e3SVarun Sethi fsl_pamu_domain_cache = kmem_cache_create("fsl_pamu_domain", 39695093e3SVarun Sethi sizeof(struct fsl_dma_domain), 40695093e3SVarun Sethi 0, 41695093e3SVarun Sethi SLAB_HWCACHE_ALIGN, 42695093e3SVarun Sethi NULL); 43695093e3SVarun Sethi if (!fsl_pamu_domain_cache) { 44695093e3SVarun Sethi pr_debug("Couldn't create fsl iommu_domain cache\n"); 45695093e3SVarun Sethi return -ENOMEM; 46695093e3SVarun Sethi } 47695093e3SVarun Sethi 48695093e3SVarun Sethi iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", 49695093e3SVarun Sethi sizeof(struct device_domain_info), 50695093e3SVarun Sethi 0, 51695093e3SVarun Sethi SLAB_HWCACHE_ALIGN, 52695093e3SVarun Sethi NULL); 53695093e3SVarun Sethi if (!iommu_devinfo_cache) { 54695093e3SVarun Sethi pr_debug("Couldn't create devinfo cache\n"); 55695093e3SVarun Sethi kmem_cache_destroy(fsl_pamu_domain_cache); 56695093e3SVarun Sethi return -ENOMEM; 57695093e3SVarun Sethi } 58695093e3SVarun Sethi 59695093e3SVarun Sethi return 0; 60695093e3SVarun Sethi } 61695093e3SVarun Sethi 62695093e3SVarun Sethi static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, dma_addr_t iova) 63695093e3SVarun Sethi { 64695093e3SVarun Sethi u32 win_cnt = dma_domain->win_cnt; 65cd70d465SEmil Medve struct dma_window *win_ptr = &dma_domain->win_arr[0]; 66695093e3SVarun Sethi struct iommu_domain_geometry *geom; 67695093e3SVarun Sethi 68695093e3SVarun Sethi geom = &dma_domain->iommu_domain->geometry; 69695093e3SVarun Sethi 70695093e3SVarun Sethi if (!win_cnt || !dma_domain->geom_size) { 71695093e3SVarun Sethi pr_debug("Number of windows/geometry not configured for the domain\n"); 72695093e3SVarun Sethi return 0; 73695093e3SVarun Sethi } 74695093e3SVarun Sethi 75695093e3SVarun Sethi if (win_cnt > 1) { 76695093e3SVarun Sethi u64 subwin_size; 77695093e3SVarun Sethi dma_addr_t subwin_iova; 78695093e3SVarun Sethi u32 wnd; 79695093e3SVarun Sethi 80695093e3SVarun Sethi subwin_size = dma_domain->geom_size >> ilog2(win_cnt); 81695093e3SVarun Sethi subwin_iova = iova & ~(subwin_size - 1); 82695093e3SVarun Sethi wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size); 83695093e3SVarun Sethi win_ptr = &dma_domain->win_arr[wnd]; 84695093e3SVarun Sethi } 85695093e3SVarun Sethi 86695093e3SVarun Sethi if (win_ptr->valid) 87cd70d465SEmil Medve return win_ptr->paddr + (iova & (win_ptr->size - 1)); 88695093e3SVarun Sethi 89695093e3SVarun Sethi return 0; 90695093e3SVarun Sethi } 91695093e3SVarun Sethi 92695093e3SVarun Sethi static int map_subwins(int liodn, struct fsl_dma_domain *dma_domain) 93695093e3SVarun Sethi { 94cd70d465SEmil Medve struct dma_window *sub_win_ptr = &dma_domain->win_arr[0]; 95695093e3SVarun Sethi int i, ret; 96695093e3SVarun Sethi unsigned long rpn, flags; 97695093e3SVarun Sethi 98695093e3SVarun Sethi for (i = 0; i < dma_domain->win_cnt; i++) { 99695093e3SVarun Sethi if (sub_win_ptr[i].valid) { 100cd70d465SEmil Medve rpn = sub_win_ptr[i].paddr >> PAMU_PAGE_SHIFT; 101695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 102695093e3SVarun Sethi ret = pamu_config_spaace(liodn, dma_domain->win_cnt, i, 103695093e3SVarun Sethi sub_win_ptr[i].size, 104695093e3SVarun Sethi ~(u32)0, 105695093e3SVarun Sethi rpn, 106695093e3SVarun Sethi dma_domain->snoop_id, 107695093e3SVarun Sethi dma_domain->stash_id, 108695093e3SVarun Sethi (i > 0) ? 1 : 0, 109695093e3SVarun Sethi sub_win_ptr[i].prot); 110695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 111695093e3SVarun Sethi if (ret) { 112cd70d465SEmil Medve pr_debug("SPAACE configuration failed for liodn %d\n", 113695093e3SVarun Sethi liodn); 114695093e3SVarun Sethi return ret; 115695093e3SVarun Sethi } 116695093e3SVarun Sethi } 117695093e3SVarun Sethi } 118695093e3SVarun Sethi 119695093e3SVarun Sethi return ret; 120695093e3SVarun Sethi } 121695093e3SVarun Sethi 122695093e3SVarun Sethi static int map_win(int liodn, struct fsl_dma_domain *dma_domain) 123695093e3SVarun Sethi { 124695093e3SVarun Sethi int ret; 125695093e3SVarun Sethi struct dma_window *wnd = &dma_domain->win_arr[0]; 126695093e3SVarun Sethi phys_addr_t wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; 127695093e3SVarun Sethi unsigned long flags; 128695093e3SVarun Sethi 129695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 130695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, wnd_addr, 131695093e3SVarun Sethi wnd->size, 132695093e3SVarun Sethi ~(u32)0, 133695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 134695093e3SVarun Sethi dma_domain->snoop_id, dma_domain->stash_id, 135695093e3SVarun Sethi 0, wnd->prot); 136695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 137695093e3SVarun Sethi if (ret) 138cd70d465SEmil Medve pr_debug("PAACE configuration failed for liodn %d\n", liodn); 139695093e3SVarun Sethi 140695093e3SVarun Sethi return ret; 141695093e3SVarun Sethi } 142695093e3SVarun Sethi 143695093e3SVarun Sethi /* Map the DMA window corresponding to the LIODN */ 144695093e3SVarun Sethi static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain) 145695093e3SVarun Sethi { 146695093e3SVarun Sethi if (dma_domain->win_cnt > 1) 147695093e3SVarun Sethi return map_subwins(liodn, dma_domain); 148695093e3SVarun Sethi else 149695093e3SVarun Sethi return map_win(liodn, dma_domain); 150695093e3SVarun Sethi } 151695093e3SVarun Sethi 152695093e3SVarun Sethi /* Update window/subwindow mapping for the LIODN */ 153695093e3SVarun Sethi static int update_liodn(int liodn, struct fsl_dma_domain *dma_domain, u32 wnd_nr) 154695093e3SVarun Sethi { 155695093e3SVarun Sethi int ret; 156695093e3SVarun Sethi struct dma_window *wnd = &dma_domain->win_arr[wnd_nr]; 157695093e3SVarun Sethi unsigned long flags; 158695093e3SVarun Sethi 159695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 160695093e3SVarun Sethi if (dma_domain->win_cnt > 1) { 161695093e3SVarun Sethi ret = pamu_config_spaace(liodn, dma_domain->win_cnt, wnd_nr, 162695093e3SVarun Sethi wnd->size, 163695093e3SVarun Sethi ~(u32)0, 164695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 165695093e3SVarun Sethi dma_domain->snoop_id, 166695093e3SVarun Sethi dma_domain->stash_id, 167695093e3SVarun Sethi (wnd_nr > 0) ? 1 : 0, 168695093e3SVarun Sethi wnd->prot); 169695093e3SVarun Sethi if (ret) 170cd70d465SEmil Medve pr_debug("Subwindow reconfiguration failed for liodn %d\n", 171cd70d465SEmil Medve liodn); 172695093e3SVarun Sethi } else { 173695093e3SVarun Sethi phys_addr_t wnd_addr; 174695093e3SVarun Sethi 175695093e3SVarun Sethi wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; 176695093e3SVarun Sethi 177695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, wnd_addr, 178695093e3SVarun Sethi wnd->size, 179695093e3SVarun Sethi ~(u32)0, 180695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 181695093e3SVarun Sethi dma_domain->snoop_id, dma_domain->stash_id, 182695093e3SVarun Sethi 0, wnd->prot); 183695093e3SVarun Sethi if (ret) 184cd70d465SEmil Medve pr_debug("Window reconfiguration failed for liodn %d\n", 185cd70d465SEmil Medve liodn); 186695093e3SVarun Sethi } 187695093e3SVarun Sethi 188695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 189695093e3SVarun Sethi 190695093e3SVarun Sethi return ret; 191695093e3SVarun Sethi } 192695093e3SVarun Sethi 193695093e3SVarun Sethi static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, 194695093e3SVarun Sethi u32 val) 195695093e3SVarun Sethi { 196695093e3SVarun Sethi int ret = 0, i; 197695093e3SVarun Sethi unsigned long flags; 198695093e3SVarun Sethi 199695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 200695093e3SVarun Sethi if (!dma_domain->win_arr) { 201cd70d465SEmil Medve pr_debug("Windows not configured, stash destination update failed for liodn %d\n", 202cd70d465SEmil Medve liodn); 203695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 204695093e3SVarun Sethi return -EINVAL; 205695093e3SVarun Sethi } 206695093e3SVarun Sethi 207695093e3SVarun Sethi for (i = 0; i < dma_domain->win_cnt; i++) { 208695093e3SVarun Sethi ret = pamu_update_paace_stash(liodn, i, val); 209695093e3SVarun Sethi if (ret) { 210cd70d465SEmil Medve pr_debug("Failed to update SPAACE %d field for liodn %d\n ", 211cd70d465SEmil Medve i, liodn); 212695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 213695093e3SVarun Sethi return ret; 214695093e3SVarun Sethi } 215695093e3SVarun Sethi } 216695093e3SVarun Sethi 217695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 218695093e3SVarun Sethi 219695093e3SVarun Sethi return ret; 220695093e3SVarun Sethi } 221695093e3SVarun Sethi 222695093e3SVarun Sethi /* Set the geometry parameters for a LIODN */ 223695093e3SVarun Sethi static int pamu_set_liodn(int liodn, struct device *dev, 224695093e3SVarun Sethi struct fsl_dma_domain *dma_domain, 225695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr, 226695093e3SVarun Sethi u32 win_cnt) 227695093e3SVarun Sethi { 228695093e3SVarun Sethi phys_addr_t window_addr, window_size; 229695093e3SVarun Sethi phys_addr_t subwin_size; 230695093e3SVarun Sethi int ret = 0, i; 231695093e3SVarun Sethi u32 omi_index = ~(u32)0; 232695093e3SVarun Sethi unsigned long flags; 233695093e3SVarun Sethi 234695093e3SVarun Sethi /* 235695093e3SVarun Sethi * Configure the omi_index at the geometry setup time. 236695093e3SVarun Sethi * This is a static value which depends on the type of 237695093e3SVarun Sethi * device and would not change thereafter. 238695093e3SVarun Sethi */ 239695093e3SVarun Sethi get_ome_index(&omi_index, dev); 240695093e3SVarun Sethi 241695093e3SVarun Sethi window_addr = geom_attr->aperture_start; 242695093e3SVarun Sethi window_size = dma_domain->geom_size; 243695093e3SVarun Sethi 244695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 245695093e3SVarun Sethi ret = pamu_disable_liodn(liodn); 246695093e3SVarun Sethi if (!ret) 247695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index, 248695093e3SVarun Sethi 0, dma_domain->snoop_id, 249695093e3SVarun Sethi dma_domain->stash_id, win_cnt, 0); 250695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 251695093e3SVarun Sethi if (ret) { 252cd70d465SEmil Medve pr_debug("PAACE configuration failed for liodn %d, win_cnt =%d\n", 253cd70d465SEmil Medve liodn, win_cnt); 254695093e3SVarun Sethi return ret; 255695093e3SVarun Sethi } 256695093e3SVarun Sethi 257695093e3SVarun Sethi if (win_cnt > 1) { 258695093e3SVarun Sethi subwin_size = window_size >> ilog2(win_cnt); 259695093e3SVarun Sethi for (i = 0; i < win_cnt; i++) { 260695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 261695093e3SVarun Sethi ret = pamu_disable_spaace(liodn, i); 262695093e3SVarun Sethi if (!ret) 263695093e3SVarun Sethi ret = pamu_config_spaace(liodn, win_cnt, i, 264695093e3SVarun Sethi subwin_size, omi_index, 265695093e3SVarun Sethi 0, dma_domain->snoop_id, 266695093e3SVarun Sethi dma_domain->stash_id, 267695093e3SVarun Sethi 0, 0); 268695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 269695093e3SVarun Sethi if (ret) { 270cd70d465SEmil Medve pr_debug("SPAACE configuration failed for liodn %d\n", 271cd70d465SEmil Medve liodn); 272695093e3SVarun Sethi return ret; 273695093e3SVarun Sethi } 274695093e3SVarun Sethi } 275695093e3SVarun Sethi } 276695093e3SVarun Sethi 277695093e3SVarun Sethi return ret; 278695093e3SVarun Sethi } 279695093e3SVarun Sethi 280695093e3SVarun Sethi static int check_size(u64 size, dma_addr_t iova) 281695093e3SVarun Sethi { 282695093e3SVarun Sethi /* 283695093e3SVarun Sethi * Size must be a power of two and at least be equal 284695093e3SVarun Sethi * to PAMU page size. 285695093e3SVarun Sethi */ 286d033f48fSVarun Sethi if ((size & (size - 1)) || size < PAMU_PAGE_SIZE) { 287cd70d465SEmil Medve pr_debug("Size too small or not a power of two\n"); 288695093e3SVarun Sethi return -EINVAL; 289695093e3SVarun Sethi } 290695093e3SVarun Sethi 291695093e3SVarun Sethi /* iova must be page size aligned */ 292695093e3SVarun Sethi if (iova & (size - 1)) { 293cd70d465SEmil Medve pr_debug("Address is not aligned with window size\n"); 294695093e3SVarun Sethi return -EINVAL; 295695093e3SVarun Sethi } 296695093e3SVarun Sethi 297695093e3SVarun Sethi return 0; 298695093e3SVarun Sethi } 299695093e3SVarun Sethi 300695093e3SVarun Sethi static struct fsl_dma_domain *iommu_alloc_dma_domain(void) 301695093e3SVarun Sethi { 302695093e3SVarun Sethi struct fsl_dma_domain *domain; 303695093e3SVarun Sethi 304695093e3SVarun Sethi domain = kmem_cache_zalloc(fsl_pamu_domain_cache, GFP_KERNEL); 305695093e3SVarun Sethi if (!domain) 306695093e3SVarun Sethi return NULL; 307695093e3SVarun Sethi 308695093e3SVarun Sethi domain->stash_id = ~(u32)0; 309695093e3SVarun Sethi domain->snoop_id = ~(u32)0; 310695093e3SVarun Sethi domain->win_cnt = pamu_get_max_subwin_cnt(); 311695093e3SVarun Sethi domain->geom_size = 0; 312695093e3SVarun Sethi 313695093e3SVarun Sethi INIT_LIST_HEAD(&domain->devices); 314695093e3SVarun Sethi 315695093e3SVarun Sethi spin_lock_init(&domain->domain_lock); 316695093e3SVarun Sethi 317695093e3SVarun Sethi return domain; 318695093e3SVarun Sethi } 319695093e3SVarun Sethi 320695093e3SVarun Sethi static void remove_device_ref(struct device_domain_info *info, u32 win_cnt) 321695093e3SVarun Sethi { 322695093e3SVarun Sethi unsigned long flags; 323695093e3SVarun Sethi 324695093e3SVarun Sethi list_del(&info->link); 325695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 326695093e3SVarun Sethi if (win_cnt > 1) 327695093e3SVarun Sethi pamu_free_subwins(info->liodn); 328695093e3SVarun Sethi pamu_disable_liodn(info->liodn); 329695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 330695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 331695093e3SVarun Sethi info->dev->archdata.iommu_domain = NULL; 332695093e3SVarun Sethi kmem_cache_free(iommu_devinfo_cache, info); 333695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 334695093e3SVarun Sethi } 335695093e3SVarun Sethi 336695093e3SVarun Sethi static void detach_device(struct device *dev, struct fsl_dma_domain *dma_domain) 337695093e3SVarun Sethi { 338695093e3SVarun Sethi struct device_domain_info *info, *tmp; 339695093e3SVarun Sethi unsigned long flags; 340695093e3SVarun Sethi 341695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 342695093e3SVarun Sethi /* Remove the device from the domain device list */ 343695093e3SVarun Sethi list_for_each_entry_safe(info, tmp, &dma_domain->devices, link) { 344695093e3SVarun Sethi if (!dev || (info->dev == dev)) 345695093e3SVarun Sethi remove_device_ref(info, dma_domain->win_cnt); 346695093e3SVarun Sethi } 347695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 348695093e3SVarun Sethi } 349695093e3SVarun Sethi 350695093e3SVarun Sethi static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct device *dev) 351695093e3SVarun Sethi { 352695093e3SVarun Sethi struct device_domain_info *info, *old_domain_info; 353695093e3SVarun Sethi unsigned long flags; 354695093e3SVarun Sethi 355695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 356695093e3SVarun Sethi /* 357695093e3SVarun Sethi * Check here if the device is already attached to domain or not. 358695093e3SVarun Sethi * If the device is already attached to a domain detach it. 359695093e3SVarun Sethi */ 36075f0e461SVarun Sethi old_domain_info = dev->archdata.iommu_domain; 361695093e3SVarun Sethi if (old_domain_info && old_domain_info->domain != dma_domain) { 362695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 363695093e3SVarun Sethi detach_device(dev, old_domain_info->domain); 364695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 365695093e3SVarun Sethi } 366695093e3SVarun Sethi 367695093e3SVarun Sethi info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_ATOMIC); 368695093e3SVarun Sethi 369695093e3SVarun Sethi info->dev = dev; 370695093e3SVarun Sethi info->liodn = liodn; 371695093e3SVarun Sethi info->domain = dma_domain; 372695093e3SVarun Sethi 373695093e3SVarun Sethi list_add(&info->link, &dma_domain->devices); 374695093e3SVarun Sethi /* 375695093e3SVarun Sethi * In case of devices with multiple LIODNs just store 376695093e3SVarun Sethi * the info for the first LIODN as all 377695093e3SVarun Sethi * LIODNs share the same domain 378695093e3SVarun Sethi */ 37975f0e461SVarun Sethi if (!dev->archdata.iommu_domain) 380695093e3SVarun Sethi dev->archdata.iommu_domain = info; 381695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 382695093e3SVarun Sethi } 383695093e3SVarun Sethi 384695093e3SVarun Sethi static phys_addr_t fsl_pamu_iova_to_phys(struct iommu_domain *domain, 385695093e3SVarun Sethi dma_addr_t iova) 386695093e3SVarun Sethi { 387695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 388695093e3SVarun Sethi 389cd70d465SEmil Medve if (iova < domain->geometry.aperture_start || 390cd70d465SEmil Medve iova > domain->geometry.aperture_end) 391695093e3SVarun Sethi return 0; 392695093e3SVarun Sethi 393695093e3SVarun Sethi return get_phys_addr(dma_domain, iova); 394695093e3SVarun Sethi } 395695093e3SVarun Sethi 396b7eb6785SJoerg Roedel static bool fsl_pamu_capable(enum iommu_cap cap) 397695093e3SVarun Sethi { 398695093e3SVarun Sethi return cap == IOMMU_CAP_CACHE_COHERENCY; 399695093e3SVarun Sethi } 400695093e3SVarun Sethi 401695093e3SVarun Sethi static void fsl_pamu_domain_destroy(struct iommu_domain *domain) 402695093e3SVarun Sethi { 403695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 404695093e3SVarun Sethi 405695093e3SVarun Sethi domain->priv = NULL; 406695093e3SVarun Sethi 407695093e3SVarun Sethi /* remove all the devices from the device list */ 408695093e3SVarun Sethi detach_device(NULL, dma_domain); 409695093e3SVarun Sethi 410695093e3SVarun Sethi dma_domain->enabled = 0; 411695093e3SVarun Sethi dma_domain->mapped = 0; 412695093e3SVarun Sethi 413695093e3SVarun Sethi kmem_cache_free(fsl_pamu_domain_cache, dma_domain); 414695093e3SVarun Sethi } 415695093e3SVarun Sethi 416695093e3SVarun Sethi static int fsl_pamu_domain_init(struct iommu_domain *domain) 417695093e3SVarun Sethi { 418695093e3SVarun Sethi struct fsl_dma_domain *dma_domain; 419695093e3SVarun Sethi 420695093e3SVarun Sethi dma_domain = iommu_alloc_dma_domain(); 421695093e3SVarun Sethi if (!dma_domain) { 422695093e3SVarun Sethi pr_debug("dma_domain allocation failed\n"); 423695093e3SVarun Sethi return -ENOMEM; 424695093e3SVarun Sethi } 425695093e3SVarun Sethi domain->priv = dma_domain; 426695093e3SVarun Sethi dma_domain->iommu_domain = domain; 427695093e3SVarun Sethi /* defaul geometry 64 GB i.e. maximum system address */ 428695093e3SVarun Sethi domain->geometry.aperture_start = 0; 429695093e3SVarun Sethi domain->geometry.aperture_end = (1ULL << 36) - 1; 430695093e3SVarun Sethi domain->geometry.force_aperture = true; 431695093e3SVarun Sethi 432695093e3SVarun Sethi return 0; 433695093e3SVarun Sethi } 434695093e3SVarun Sethi 435695093e3SVarun Sethi /* Configure geometry settings for all LIODNs associated with domain */ 436695093e3SVarun Sethi static int pamu_set_domain_geometry(struct fsl_dma_domain *dma_domain, 437695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr, 438695093e3SVarun Sethi u32 win_cnt) 439695093e3SVarun Sethi { 440695093e3SVarun Sethi struct device_domain_info *info; 441695093e3SVarun Sethi int ret = 0; 442695093e3SVarun Sethi 443695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 444695093e3SVarun Sethi ret = pamu_set_liodn(info->liodn, info->dev, dma_domain, 445695093e3SVarun Sethi geom_attr, win_cnt); 446695093e3SVarun Sethi if (ret) 447695093e3SVarun Sethi break; 448695093e3SVarun Sethi } 449695093e3SVarun Sethi 450695093e3SVarun Sethi return ret; 451695093e3SVarun Sethi } 452695093e3SVarun Sethi 453695093e3SVarun Sethi /* Update stash destination for all LIODNs associated with the domain */ 454695093e3SVarun Sethi static int update_domain_stash(struct fsl_dma_domain *dma_domain, u32 val) 455695093e3SVarun Sethi { 456695093e3SVarun Sethi struct device_domain_info *info; 457695093e3SVarun Sethi int ret = 0; 458695093e3SVarun Sethi 459695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 460695093e3SVarun Sethi ret = update_liodn_stash(info->liodn, dma_domain, val); 461695093e3SVarun Sethi if (ret) 462695093e3SVarun Sethi break; 463695093e3SVarun Sethi } 464695093e3SVarun Sethi 465695093e3SVarun Sethi return ret; 466695093e3SVarun Sethi } 467695093e3SVarun Sethi 468695093e3SVarun Sethi /* Update domain mappings for all LIODNs associated with the domain */ 469695093e3SVarun Sethi static int update_domain_mapping(struct fsl_dma_domain *dma_domain, u32 wnd_nr) 470695093e3SVarun Sethi { 471695093e3SVarun Sethi struct device_domain_info *info; 472695093e3SVarun Sethi int ret = 0; 473695093e3SVarun Sethi 474695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 475695093e3SVarun Sethi ret = update_liodn(info->liodn, dma_domain, wnd_nr); 476695093e3SVarun Sethi if (ret) 477695093e3SVarun Sethi break; 478695093e3SVarun Sethi } 479695093e3SVarun Sethi return ret; 480695093e3SVarun Sethi } 481695093e3SVarun Sethi 482695093e3SVarun Sethi static int disable_domain_win(struct fsl_dma_domain *dma_domain, u32 wnd_nr) 483695093e3SVarun Sethi { 484695093e3SVarun Sethi struct device_domain_info *info; 485695093e3SVarun Sethi int ret = 0; 486695093e3SVarun Sethi 487695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 488695093e3SVarun Sethi if (dma_domain->win_cnt == 1 && dma_domain->enabled) { 489695093e3SVarun Sethi ret = pamu_disable_liodn(info->liodn); 490695093e3SVarun Sethi if (!ret) 491695093e3SVarun Sethi dma_domain->enabled = 0; 492695093e3SVarun Sethi } else { 493695093e3SVarun Sethi ret = pamu_disable_spaace(info->liodn, wnd_nr); 494695093e3SVarun Sethi } 495695093e3SVarun Sethi } 496695093e3SVarun Sethi 497695093e3SVarun Sethi return ret; 498695093e3SVarun Sethi } 499695093e3SVarun Sethi 500695093e3SVarun Sethi static void fsl_pamu_window_disable(struct iommu_domain *domain, u32 wnd_nr) 501695093e3SVarun Sethi { 502695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 503695093e3SVarun Sethi unsigned long flags; 504695093e3SVarun Sethi int ret; 505695093e3SVarun Sethi 506695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 507695093e3SVarun Sethi if (!dma_domain->win_arr) { 508695093e3SVarun Sethi pr_debug("Number of windows not configured\n"); 509695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 510695093e3SVarun Sethi return; 511695093e3SVarun Sethi } 512695093e3SVarun Sethi 513695093e3SVarun Sethi if (wnd_nr >= dma_domain->win_cnt) { 514695093e3SVarun Sethi pr_debug("Invalid window index\n"); 515695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 516695093e3SVarun Sethi return; 517695093e3SVarun Sethi } 518695093e3SVarun Sethi 519695093e3SVarun Sethi if (dma_domain->win_arr[wnd_nr].valid) { 520695093e3SVarun Sethi ret = disable_domain_win(dma_domain, wnd_nr); 521695093e3SVarun Sethi if (!ret) { 522695093e3SVarun Sethi dma_domain->win_arr[wnd_nr].valid = 0; 523695093e3SVarun Sethi dma_domain->mapped--; 524695093e3SVarun Sethi } 525695093e3SVarun Sethi } 526695093e3SVarun Sethi 527695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 528695093e3SVarun Sethi } 529695093e3SVarun Sethi 530695093e3SVarun Sethi static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr, 531695093e3SVarun Sethi phys_addr_t paddr, u64 size, int prot) 532695093e3SVarun Sethi { 533695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 534695093e3SVarun Sethi struct dma_window *wnd; 535695093e3SVarun Sethi int pamu_prot = 0; 536695093e3SVarun Sethi int ret; 537695093e3SVarun Sethi unsigned long flags; 538695093e3SVarun Sethi u64 win_size; 539695093e3SVarun Sethi 540695093e3SVarun Sethi if (prot & IOMMU_READ) 541695093e3SVarun Sethi pamu_prot |= PAACE_AP_PERMS_QUERY; 542695093e3SVarun Sethi if (prot & IOMMU_WRITE) 543695093e3SVarun Sethi pamu_prot |= PAACE_AP_PERMS_UPDATE; 544695093e3SVarun Sethi 545695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 546695093e3SVarun Sethi if (!dma_domain->win_arr) { 547695093e3SVarun Sethi pr_debug("Number of windows not configured\n"); 548695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 549695093e3SVarun Sethi return -ENODEV; 550695093e3SVarun Sethi } 551695093e3SVarun Sethi 552695093e3SVarun Sethi if (wnd_nr >= dma_domain->win_cnt) { 553695093e3SVarun Sethi pr_debug("Invalid window index\n"); 554695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 555695093e3SVarun Sethi return -EINVAL; 556695093e3SVarun Sethi } 557695093e3SVarun Sethi 558695093e3SVarun Sethi win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt); 559695093e3SVarun Sethi if (size > win_size) { 560695093e3SVarun Sethi pr_debug("Invalid window size\n"); 561695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 562695093e3SVarun Sethi return -EINVAL; 563695093e3SVarun Sethi } 564695093e3SVarun Sethi 565695093e3SVarun Sethi if (dma_domain->win_cnt == 1) { 566695093e3SVarun Sethi if (dma_domain->enabled) { 567695093e3SVarun Sethi pr_debug("Disable the window before updating the mapping\n"); 568695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 569695093e3SVarun Sethi return -EBUSY; 570695093e3SVarun Sethi } 571695093e3SVarun Sethi 572695093e3SVarun Sethi ret = check_size(size, domain->geometry.aperture_start); 573695093e3SVarun Sethi if (ret) { 574695093e3SVarun Sethi pr_debug("Aperture start not aligned to the size\n"); 575695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 576695093e3SVarun Sethi return -EINVAL; 577695093e3SVarun Sethi } 578695093e3SVarun Sethi } 579695093e3SVarun Sethi 580695093e3SVarun Sethi wnd = &dma_domain->win_arr[wnd_nr]; 581695093e3SVarun Sethi if (!wnd->valid) { 582695093e3SVarun Sethi wnd->paddr = paddr; 583695093e3SVarun Sethi wnd->size = size; 584695093e3SVarun Sethi wnd->prot = pamu_prot; 585695093e3SVarun Sethi 586695093e3SVarun Sethi ret = update_domain_mapping(dma_domain, wnd_nr); 587695093e3SVarun Sethi if (!ret) { 588695093e3SVarun Sethi wnd->valid = 1; 589695093e3SVarun Sethi dma_domain->mapped++; 590695093e3SVarun Sethi } 591695093e3SVarun Sethi } else { 592695093e3SVarun Sethi pr_debug("Disable the window before updating the mapping\n"); 593695093e3SVarun Sethi ret = -EBUSY; 594695093e3SVarun Sethi } 595695093e3SVarun Sethi 596695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 597695093e3SVarun Sethi 598695093e3SVarun Sethi return ret; 599695093e3SVarun Sethi } 600695093e3SVarun Sethi 601695093e3SVarun Sethi /* 602695093e3SVarun Sethi * Attach the LIODN to the DMA domain and configure the geometry 603695093e3SVarun Sethi * and window mappings. 604695093e3SVarun Sethi */ 605695093e3SVarun Sethi static int handle_attach_device(struct fsl_dma_domain *dma_domain, 606695093e3SVarun Sethi struct device *dev, const u32 *liodn, 607695093e3SVarun Sethi int num) 608695093e3SVarun Sethi { 609695093e3SVarun Sethi unsigned long flags; 610695093e3SVarun Sethi struct iommu_domain *domain = dma_domain->iommu_domain; 611695093e3SVarun Sethi int ret = 0; 612695093e3SVarun Sethi int i; 613695093e3SVarun Sethi 614695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 615695093e3SVarun Sethi for (i = 0; i < num; i++) { 616695093e3SVarun Sethi /* Ensure that LIODN value is valid */ 617695093e3SVarun Sethi if (liodn[i] >= PAACE_NUMBER_ENTRIES) { 618695093e3SVarun Sethi pr_debug("Invalid liodn %d, attach device failed for %s\n", 619695093e3SVarun Sethi liodn[i], dev->of_node->full_name); 620695093e3SVarun Sethi ret = -EINVAL; 621695093e3SVarun Sethi break; 622695093e3SVarun Sethi } 623695093e3SVarun Sethi 624695093e3SVarun Sethi attach_device(dma_domain, liodn[i], dev); 625695093e3SVarun Sethi /* 626695093e3SVarun Sethi * Check if geometry has already been configured 627695093e3SVarun Sethi * for the domain. If yes, set the geometry for 628695093e3SVarun Sethi * the LIODN. 629695093e3SVarun Sethi */ 630695093e3SVarun Sethi if (dma_domain->win_arr) { 631695093e3SVarun Sethi u32 win_cnt = dma_domain->win_cnt > 1 ? dma_domain->win_cnt : 0; 632cd70d465SEmil Medve 633695093e3SVarun Sethi ret = pamu_set_liodn(liodn[i], dev, dma_domain, 634cd70d465SEmil Medve &domain->geometry, win_cnt); 635695093e3SVarun Sethi if (ret) 636695093e3SVarun Sethi break; 637695093e3SVarun Sethi if (dma_domain->mapped) { 638695093e3SVarun Sethi /* 639695093e3SVarun Sethi * Create window/subwindow mapping for 640695093e3SVarun Sethi * the LIODN. 641695093e3SVarun Sethi */ 642695093e3SVarun Sethi ret = map_liodn(liodn[i], dma_domain); 643695093e3SVarun Sethi if (ret) 644695093e3SVarun Sethi break; 645695093e3SVarun Sethi } 646695093e3SVarun Sethi } 647695093e3SVarun Sethi } 648695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 649695093e3SVarun Sethi 650695093e3SVarun Sethi return ret; 651695093e3SVarun Sethi } 652695093e3SVarun Sethi 653695093e3SVarun Sethi static int fsl_pamu_attach_device(struct iommu_domain *domain, 654695093e3SVarun Sethi struct device *dev) 655695093e3SVarun Sethi { 656695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 657695093e3SVarun Sethi const u32 *liodn; 658695093e3SVarun Sethi u32 liodn_cnt; 659695093e3SVarun Sethi int len, ret = 0; 660695093e3SVarun Sethi struct pci_dev *pdev = NULL; 661695093e3SVarun Sethi struct pci_controller *pci_ctl; 662695093e3SVarun Sethi 663695093e3SVarun Sethi /* 664695093e3SVarun Sethi * Use LIODN of the PCI controller while attaching a 665695093e3SVarun Sethi * PCI device. 666695093e3SVarun Sethi */ 667b3eb76d1SYijing Wang if (dev_is_pci(dev)) { 668695093e3SVarun Sethi pdev = to_pci_dev(dev); 669695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 670695093e3SVarun Sethi /* 671695093e3SVarun Sethi * make dev point to pci controller device 672695093e3SVarun Sethi * so we can get the LIODN programmed by 673695093e3SVarun Sethi * u-boot. 674695093e3SVarun Sethi */ 675695093e3SVarun Sethi dev = pci_ctl->parent; 676695093e3SVarun Sethi } 677695093e3SVarun Sethi 678695093e3SVarun Sethi liodn = of_get_property(dev->of_node, "fsl,liodn", &len); 679695093e3SVarun Sethi if (liodn) { 680695093e3SVarun Sethi liodn_cnt = len / sizeof(u32); 681cd70d465SEmil Medve ret = handle_attach_device(dma_domain, dev, liodn, liodn_cnt); 682695093e3SVarun Sethi } else { 683695093e3SVarun Sethi pr_debug("missing fsl,liodn property at %s\n", 684695093e3SVarun Sethi dev->of_node->full_name); 685695093e3SVarun Sethi ret = -EINVAL; 686695093e3SVarun Sethi } 687695093e3SVarun Sethi 688695093e3SVarun Sethi return ret; 689695093e3SVarun Sethi } 690695093e3SVarun Sethi 691695093e3SVarun Sethi static void fsl_pamu_detach_device(struct iommu_domain *domain, 692695093e3SVarun Sethi struct device *dev) 693695093e3SVarun Sethi { 694695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 695695093e3SVarun Sethi const u32 *prop; 696695093e3SVarun Sethi int len; 697695093e3SVarun Sethi struct pci_dev *pdev = NULL; 698695093e3SVarun Sethi struct pci_controller *pci_ctl; 699695093e3SVarun Sethi 700695093e3SVarun Sethi /* 701695093e3SVarun Sethi * Use LIODN of the PCI controller while detaching a 702695093e3SVarun Sethi * PCI device. 703695093e3SVarun Sethi */ 704b3eb76d1SYijing Wang if (dev_is_pci(dev)) { 705695093e3SVarun Sethi pdev = to_pci_dev(dev); 706695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 707695093e3SVarun Sethi /* 708695093e3SVarun Sethi * make dev point to pci controller device 709695093e3SVarun Sethi * so we can get the LIODN programmed by 710695093e3SVarun Sethi * u-boot. 711695093e3SVarun Sethi */ 712695093e3SVarun Sethi dev = pci_ctl->parent; 713695093e3SVarun Sethi } 714695093e3SVarun Sethi 715695093e3SVarun Sethi prop = of_get_property(dev->of_node, "fsl,liodn", &len); 716695093e3SVarun Sethi if (prop) 717695093e3SVarun Sethi detach_device(dev, dma_domain); 718695093e3SVarun Sethi else 719695093e3SVarun Sethi pr_debug("missing fsl,liodn property at %s\n", 720695093e3SVarun Sethi dev->of_node->full_name); 721695093e3SVarun Sethi } 722695093e3SVarun Sethi 723695093e3SVarun Sethi static int configure_domain_geometry(struct iommu_domain *domain, void *data) 724695093e3SVarun Sethi { 725695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr = data; 726695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 727695093e3SVarun Sethi dma_addr_t geom_size; 728695093e3SVarun Sethi unsigned long flags; 729695093e3SVarun Sethi 730695093e3SVarun Sethi geom_size = geom_attr->aperture_end - geom_attr->aperture_start + 1; 731695093e3SVarun Sethi /* 732695093e3SVarun Sethi * Sanity check the geometry size. Also, we do not support 733695093e3SVarun Sethi * DMA outside of the geometry. 734695093e3SVarun Sethi */ 735695093e3SVarun Sethi if (check_size(geom_size, geom_attr->aperture_start) || 736695093e3SVarun Sethi !geom_attr->force_aperture) { 737695093e3SVarun Sethi pr_debug("Invalid PAMU geometry attributes\n"); 738695093e3SVarun Sethi return -EINVAL; 739695093e3SVarun Sethi } 740695093e3SVarun Sethi 741695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 742695093e3SVarun Sethi if (dma_domain->enabled) { 743695093e3SVarun Sethi pr_debug("Can't set geometry attributes as domain is active\n"); 744695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 745695093e3SVarun Sethi return -EBUSY; 746695093e3SVarun Sethi } 747695093e3SVarun Sethi 748695093e3SVarun Sethi /* Copy the domain geometry information */ 749695093e3SVarun Sethi memcpy(&domain->geometry, geom_attr, 750695093e3SVarun Sethi sizeof(struct iommu_domain_geometry)); 751695093e3SVarun Sethi dma_domain->geom_size = geom_size; 752695093e3SVarun Sethi 753695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 754695093e3SVarun Sethi 755695093e3SVarun Sethi return 0; 756695093e3SVarun Sethi } 757695093e3SVarun Sethi 758695093e3SVarun Sethi /* Set the domain stash attribute */ 759695093e3SVarun Sethi static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void *data) 760695093e3SVarun Sethi { 761695093e3SVarun Sethi struct pamu_stash_attribute *stash_attr = data; 762695093e3SVarun Sethi unsigned long flags; 763695093e3SVarun Sethi int ret; 764695093e3SVarun Sethi 765695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 766695093e3SVarun Sethi 767695093e3SVarun Sethi memcpy(&dma_domain->dma_stash, stash_attr, 768695093e3SVarun Sethi sizeof(struct pamu_stash_attribute)); 769695093e3SVarun Sethi 770695093e3SVarun Sethi dma_domain->stash_id = get_stash_id(stash_attr->cache, 771695093e3SVarun Sethi stash_attr->cpu); 772695093e3SVarun Sethi if (dma_domain->stash_id == ~(u32)0) { 773695093e3SVarun Sethi pr_debug("Invalid stash attributes\n"); 774695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 775695093e3SVarun Sethi return -EINVAL; 776695093e3SVarun Sethi } 777695093e3SVarun Sethi 778695093e3SVarun Sethi ret = update_domain_stash(dma_domain, dma_domain->stash_id); 779695093e3SVarun Sethi 780695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 781695093e3SVarun Sethi 782695093e3SVarun Sethi return ret; 783695093e3SVarun Sethi } 784695093e3SVarun Sethi 785695093e3SVarun Sethi /* Configure domain dma state i.e. enable/disable DMA */ 786695093e3SVarun Sethi static int configure_domain_dma_state(struct fsl_dma_domain *dma_domain, bool enable) 787695093e3SVarun Sethi { 788695093e3SVarun Sethi struct device_domain_info *info; 789695093e3SVarun Sethi unsigned long flags; 790695093e3SVarun Sethi int ret; 791695093e3SVarun Sethi 792695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 793695093e3SVarun Sethi 794695093e3SVarun Sethi if (enable && !dma_domain->mapped) { 795695093e3SVarun Sethi pr_debug("Can't enable DMA domain without valid mapping\n"); 796695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 797695093e3SVarun Sethi return -ENODEV; 798695093e3SVarun Sethi } 799695093e3SVarun Sethi 800695093e3SVarun Sethi dma_domain->enabled = enable; 801cd70d465SEmil Medve list_for_each_entry(info, &dma_domain->devices, link) { 802695093e3SVarun Sethi ret = (enable) ? pamu_enable_liodn(info->liodn) : 803695093e3SVarun Sethi pamu_disable_liodn(info->liodn); 804695093e3SVarun Sethi if (ret) 805695093e3SVarun Sethi pr_debug("Unable to set dma state for liodn %d", 806695093e3SVarun Sethi info->liodn); 807695093e3SVarun Sethi } 808695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 809695093e3SVarun Sethi 810695093e3SVarun Sethi return 0; 811695093e3SVarun Sethi } 812695093e3SVarun Sethi 813695093e3SVarun Sethi static int fsl_pamu_set_domain_attr(struct iommu_domain *domain, 814695093e3SVarun Sethi enum iommu_attr attr_type, void *data) 815695093e3SVarun Sethi { 816695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 817695093e3SVarun Sethi int ret = 0; 818695093e3SVarun Sethi 819695093e3SVarun Sethi switch (attr_type) { 820695093e3SVarun Sethi case DOMAIN_ATTR_GEOMETRY: 821695093e3SVarun Sethi ret = configure_domain_geometry(domain, data); 822695093e3SVarun Sethi break; 823695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_STASH: 824695093e3SVarun Sethi ret = configure_domain_stash(dma_domain, data); 825695093e3SVarun Sethi break; 826695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_ENABLE: 827695093e3SVarun Sethi ret = configure_domain_dma_state(dma_domain, *(int *)data); 828695093e3SVarun Sethi break; 829695093e3SVarun Sethi default: 830695093e3SVarun Sethi pr_debug("Unsupported attribute type\n"); 831695093e3SVarun Sethi ret = -EINVAL; 832695093e3SVarun Sethi break; 833cd70d465SEmil Medve } 834695093e3SVarun Sethi 835695093e3SVarun Sethi return ret; 836695093e3SVarun Sethi } 837695093e3SVarun Sethi 838695093e3SVarun Sethi static int fsl_pamu_get_domain_attr(struct iommu_domain *domain, 839695093e3SVarun Sethi enum iommu_attr attr_type, void *data) 840695093e3SVarun Sethi { 841695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 842695093e3SVarun Sethi int ret = 0; 843695093e3SVarun Sethi 844695093e3SVarun Sethi switch (attr_type) { 845695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_STASH: 846cd70d465SEmil Medve memcpy(data, &dma_domain->dma_stash, 847695093e3SVarun Sethi sizeof(struct pamu_stash_attribute)); 848695093e3SVarun Sethi break; 849695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_ENABLE: 850695093e3SVarun Sethi *(int *)data = dma_domain->enabled; 851695093e3SVarun Sethi break; 852695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMUV1: 853695093e3SVarun Sethi *(int *)data = DOMAIN_ATTR_FSL_PAMUV1; 854695093e3SVarun Sethi break; 855695093e3SVarun Sethi default: 856695093e3SVarun Sethi pr_debug("Unsupported attribute type\n"); 857695093e3SVarun Sethi ret = -EINVAL; 858695093e3SVarun Sethi break; 859cd70d465SEmil Medve } 860695093e3SVarun Sethi 861695093e3SVarun Sethi return ret; 862695093e3SVarun Sethi } 863695093e3SVarun Sethi 864695093e3SVarun Sethi static struct iommu_group *get_device_iommu_group(struct device *dev) 865695093e3SVarun Sethi { 866695093e3SVarun Sethi struct iommu_group *group; 867695093e3SVarun Sethi 868695093e3SVarun Sethi group = iommu_group_get(dev); 869695093e3SVarun Sethi if (!group) 870695093e3SVarun Sethi group = iommu_group_alloc(); 871695093e3SVarun Sethi 872695093e3SVarun Sethi return group; 873695093e3SVarun Sethi } 874695093e3SVarun Sethi 875695093e3SVarun Sethi static bool check_pci_ctl_endpt_part(struct pci_controller *pci_ctl) 876695093e3SVarun Sethi { 877695093e3SVarun Sethi u32 version; 878695093e3SVarun Sethi 879695093e3SVarun Sethi /* Check the PCI controller version number by readding BRR1 register */ 880695093e3SVarun Sethi version = in_be32(pci_ctl->cfg_addr + (PCI_FSL_BRR1 >> 2)); 881695093e3SVarun Sethi version &= PCI_FSL_BRR1_VER; 882695093e3SVarun Sethi /* If PCI controller version is >= 0x204 we can partition endpoints */ 883cd70d465SEmil Medve return version >= 0x204; 884695093e3SVarun Sethi } 885695093e3SVarun Sethi 886695093e3SVarun Sethi /* Get iommu group information from peer devices or devices on the parent bus */ 887695093e3SVarun Sethi static struct iommu_group *get_shared_pci_device_group(struct pci_dev *pdev) 888695093e3SVarun Sethi { 889695093e3SVarun Sethi struct pci_dev *tmp; 890695093e3SVarun Sethi struct iommu_group *group; 891695093e3SVarun Sethi struct pci_bus *bus = pdev->bus; 892695093e3SVarun Sethi 893695093e3SVarun Sethi /* 894695093e3SVarun Sethi * Traverese the pci bus device list to get 895695093e3SVarun Sethi * the shared iommu group. 896695093e3SVarun Sethi */ 897695093e3SVarun Sethi while (bus) { 898695093e3SVarun Sethi list_for_each_entry(tmp, &bus->devices, bus_list) { 899695093e3SVarun Sethi if (tmp == pdev) 900695093e3SVarun Sethi continue; 901695093e3SVarun Sethi group = iommu_group_get(&tmp->dev); 902695093e3SVarun Sethi if (group) 903695093e3SVarun Sethi return group; 904695093e3SVarun Sethi } 905695093e3SVarun Sethi 906695093e3SVarun Sethi bus = bus->parent; 907695093e3SVarun Sethi } 908695093e3SVarun Sethi 909695093e3SVarun Sethi return NULL; 910695093e3SVarun Sethi } 911695093e3SVarun Sethi 912695093e3SVarun Sethi static struct iommu_group *get_pci_device_group(struct pci_dev *pdev) 913695093e3SVarun Sethi { 914695093e3SVarun Sethi struct pci_controller *pci_ctl; 915695093e3SVarun Sethi bool pci_endpt_partioning; 916695093e3SVarun Sethi struct iommu_group *group = NULL; 917695093e3SVarun Sethi 918695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 919695093e3SVarun Sethi pci_endpt_partioning = check_pci_ctl_endpt_part(pci_ctl); 920695093e3SVarun Sethi /* We can partition PCIe devices so assign device group to the device */ 921695093e3SVarun Sethi if (pci_endpt_partioning) { 9227319ededSAlex Williamson group = iommu_group_get_for_dev(&pdev->dev); 923695093e3SVarun Sethi 924695093e3SVarun Sethi /* 925695093e3SVarun Sethi * PCIe controller is not a paritionable entity 926695093e3SVarun Sethi * free the controller device iommu_group. 927695093e3SVarun Sethi */ 928695093e3SVarun Sethi if (pci_ctl->parent->iommu_group) 929695093e3SVarun Sethi iommu_group_remove_device(pci_ctl->parent); 930695093e3SVarun Sethi } else { 931695093e3SVarun Sethi /* 932695093e3SVarun Sethi * All devices connected to the controller will share the 933695093e3SVarun Sethi * PCI controllers device group. If this is the first 934695093e3SVarun Sethi * device to be probed for the pci controller, copy the 935695093e3SVarun Sethi * device group information from the PCI controller device 936695093e3SVarun Sethi * node and remove the PCI controller iommu group. 937695093e3SVarun Sethi * For subsequent devices, the iommu group information can 938695093e3SVarun Sethi * be obtained from sibling devices (i.e. from the bus_devices 939695093e3SVarun Sethi * link list). 940695093e3SVarun Sethi */ 941695093e3SVarun Sethi if (pci_ctl->parent->iommu_group) { 942695093e3SVarun Sethi group = get_device_iommu_group(pci_ctl->parent); 943695093e3SVarun Sethi iommu_group_remove_device(pci_ctl->parent); 944cd70d465SEmil Medve } else { 945695093e3SVarun Sethi group = get_shared_pci_device_group(pdev); 946695093e3SVarun Sethi } 947cd70d465SEmil Medve } 948695093e3SVarun Sethi 9493170447cSVarun Sethi if (!group) 9503170447cSVarun Sethi group = ERR_PTR(-ENODEV); 9513170447cSVarun Sethi 952695093e3SVarun Sethi return group; 953695093e3SVarun Sethi } 954695093e3SVarun Sethi 955695093e3SVarun Sethi static int fsl_pamu_add_device(struct device *dev) 956695093e3SVarun Sethi { 9573170447cSVarun Sethi struct iommu_group *group = ERR_PTR(-ENODEV); 958695093e3SVarun Sethi struct pci_dev *pdev; 959695093e3SVarun Sethi const u32 *prop; 9605a9137a6SVarun Sethi int ret = 0, len; 961695093e3SVarun Sethi 962695093e3SVarun Sethi /* 963695093e3SVarun Sethi * For platform devices we allocate a separate group for 964695093e3SVarun Sethi * each of the devices. 965695093e3SVarun Sethi */ 966b3eb76d1SYijing Wang if (dev_is_pci(dev)) { 967695093e3SVarun Sethi pdev = to_pci_dev(dev); 968695093e3SVarun Sethi /* Don't create device groups for virtual PCI bridges */ 969695093e3SVarun Sethi if (pdev->subordinate) 970695093e3SVarun Sethi return 0; 971695093e3SVarun Sethi 972695093e3SVarun Sethi group = get_pci_device_group(pdev); 973695093e3SVarun Sethi 974695093e3SVarun Sethi } else { 975695093e3SVarun Sethi prop = of_get_property(dev->of_node, "fsl,liodn", &len); 976695093e3SVarun Sethi if (prop) 977695093e3SVarun Sethi group = get_device_iommu_group(dev); 978695093e3SVarun Sethi } 979695093e3SVarun Sethi 9803170447cSVarun Sethi if (IS_ERR(group)) 981695093e3SVarun Sethi return PTR_ERR(group); 982695093e3SVarun Sethi 9835a9137a6SVarun Sethi /* 9845a9137a6SVarun Sethi * Check if device has already been added to an iommu group. 9855a9137a6SVarun Sethi * Group could have already been created for a PCI device in 9865a9137a6SVarun Sethi * the iommu_group_get_for_dev path. 9875a9137a6SVarun Sethi */ 9885a9137a6SVarun Sethi if (!dev->iommu_group) 989695093e3SVarun Sethi ret = iommu_group_add_device(group, dev); 990695093e3SVarun Sethi 991695093e3SVarun Sethi iommu_group_put(group); 992695093e3SVarun Sethi return ret; 993695093e3SVarun Sethi } 994695093e3SVarun Sethi 995695093e3SVarun Sethi static void fsl_pamu_remove_device(struct device *dev) 996695093e3SVarun Sethi { 997695093e3SVarun Sethi iommu_group_remove_device(dev); 998695093e3SVarun Sethi } 999695093e3SVarun Sethi 1000695093e3SVarun Sethi static int fsl_pamu_set_windows(struct iommu_domain *domain, u32 w_count) 1001695093e3SVarun Sethi { 1002695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 1003695093e3SVarun Sethi unsigned long flags; 1004695093e3SVarun Sethi int ret; 1005695093e3SVarun Sethi 1006695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 1007695093e3SVarun Sethi /* Ensure domain is inactive i.e. DMA should be disabled for the domain */ 1008695093e3SVarun Sethi if (dma_domain->enabled) { 1009695093e3SVarun Sethi pr_debug("Can't set geometry attributes as domain is active\n"); 1010695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1011695093e3SVarun Sethi return -EBUSY; 1012695093e3SVarun Sethi } 1013695093e3SVarun Sethi 1014695093e3SVarun Sethi /* Ensure that the geometry has been set for the domain */ 1015695093e3SVarun Sethi if (!dma_domain->geom_size) { 1016695093e3SVarun Sethi pr_debug("Please configure geometry before setting the number of windows\n"); 1017695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1018695093e3SVarun Sethi return -EINVAL; 1019695093e3SVarun Sethi } 1020695093e3SVarun Sethi 1021695093e3SVarun Sethi /* 1022695093e3SVarun Sethi * Ensure we have valid window count i.e. it should be less than 1023695093e3SVarun Sethi * maximum permissible limit and should be a power of two. 1024695093e3SVarun Sethi */ 1025695093e3SVarun Sethi if (w_count > pamu_get_max_subwin_cnt() || !is_power_of_2(w_count)) { 1026695093e3SVarun Sethi pr_debug("Invalid window count\n"); 1027695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1028695093e3SVarun Sethi return -EINVAL; 1029695093e3SVarun Sethi } 1030695093e3SVarun Sethi 1031695093e3SVarun Sethi ret = pamu_set_domain_geometry(dma_domain, &domain->geometry, 1032cd70d465SEmil Medve w_count > 1 ? w_count : 0); 1033695093e3SVarun Sethi if (!ret) { 1034695093e3SVarun Sethi kfree(dma_domain->win_arr); 1035cd70d465SEmil Medve dma_domain->win_arr = kcalloc(w_count, 1036cd70d465SEmil Medve sizeof(*dma_domain->win_arr), 1037cd70d465SEmil Medve GFP_ATOMIC); 1038695093e3SVarun Sethi if (!dma_domain->win_arr) { 1039695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1040695093e3SVarun Sethi return -ENOMEM; 1041695093e3SVarun Sethi } 1042695093e3SVarun Sethi dma_domain->win_cnt = w_count; 1043695093e3SVarun Sethi } 1044695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1045695093e3SVarun Sethi 1046695093e3SVarun Sethi return ret; 1047695093e3SVarun Sethi } 1048695093e3SVarun Sethi 1049695093e3SVarun Sethi static u32 fsl_pamu_get_windows(struct iommu_domain *domain) 1050695093e3SVarun Sethi { 1051695093e3SVarun Sethi struct fsl_dma_domain *dma_domain = domain->priv; 1052695093e3SVarun Sethi 1053695093e3SVarun Sethi return dma_domain->win_cnt; 1054695093e3SVarun Sethi } 1055695093e3SVarun Sethi 1056b22f6434SThierry Reding static const struct iommu_ops fsl_pamu_ops = { 1057b7eb6785SJoerg Roedel .capable = fsl_pamu_capable, 1058695093e3SVarun Sethi .domain_init = fsl_pamu_domain_init, 1059695093e3SVarun Sethi .domain_destroy = fsl_pamu_domain_destroy, 1060695093e3SVarun Sethi .attach_dev = fsl_pamu_attach_device, 1061695093e3SVarun Sethi .detach_dev = fsl_pamu_detach_device, 1062695093e3SVarun Sethi .domain_window_enable = fsl_pamu_window_enable, 1063695093e3SVarun Sethi .domain_window_disable = fsl_pamu_window_disable, 1064695093e3SVarun Sethi .domain_get_windows = fsl_pamu_get_windows, 1065695093e3SVarun Sethi .domain_set_windows = fsl_pamu_set_windows, 1066695093e3SVarun Sethi .iova_to_phys = fsl_pamu_iova_to_phys, 1067695093e3SVarun Sethi .domain_set_attr = fsl_pamu_set_domain_attr, 1068695093e3SVarun Sethi .domain_get_attr = fsl_pamu_get_domain_attr, 1069695093e3SVarun Sethi .add_device = fsl_pamu_add_device, 1070695093e3SVarun Sethi .remove_device = fsl_pamu_remove_device, 1071695093e3SVarun Sethi }; 1072695093e3SVarun Sethi 1073cd70d465SEmil Medve int __init pamu_domain_init(void) 1074695093e3SVarun Sethi { 1075695093e3SVarun Sethi int ret = 0; 1076695093e3SVarun Sethi 1077695093e3SVarun Sethi ret = iommu_init_mempool(); 1078695093e3SVarun Sethi if (ret) 1079695093e3SVarun Sethi return ret; 1080695093e3SVarun Sethi 1081695093e3SVarun Sethi bus_set_iommu(&platform_bus_type, &fsl_pamu_ops); 1082695093e3SVarun Sethi bus_set_iommu(&pci_bus_type, &fsl_pamu_ops); 1083695093e3SVarun Sethi 1084695093e3SVarun Sethi return ret; 1085695093e3SVarun Sethi } 1086