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 363ff2dcc0SJoerg Roedel struct iommu_device pamu_iommu; /* IOMMU core code handle */ 373ff2dcc0SJoerg Roedel 388d4bfe40SJoerg Roedel static struct fsl_dma_domain *to_fsl_dma_domain(struct iommu_domain *dom) 398d4bfe40SJoerg Roedel { 408d4bfe40SJoerg Roedel return container_of(dom, struct fsl_dma_domain, iommu_domain); 418d4bfe40SJoerg Roedel } 428d4bfe40SJoerg Roedel 43695093e3SVarun Sethi static int __init iommu_init_mempool(void) 44695093e3SVarun Sethi { 45695093e3SVarun Sethi fsl_pamu_domain_cache = kmem_cache_create("fsl_pamu_domain", 46695093e3SVarun Sethi sizeof(struct fsl_dma_domain), 47695093e3SVarun Sethi 0, 48695093e3SVarun Sethi SLAB_HWCACHE_ALIGN, 49695093e3SVarun Sethi NULL); 50695093e3SVarun Sethi if (!fsl_pamu_domain_cache) { 51695093e3SVarun Sethi pr_debug("Couldn't create fsl iommu_domain cache\n"); 52695093e3SVarun Sethi return -ENOMEM; 53695093e3SVarun Sethi } 54695093e3SVarun Sethi 55695093e3SVarun Sethi iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", 56695093e3SVarun Sethi sizeof(struct device_domain_info), 57695093e3SVarun Sethi 0, 58695093e3SVarun Sethi SLAB_HWCACHE_ALIGN, 59695093e3SVarun Sethi NULL); 60695093e3SVarun Sethi if (!iommu_devinfo_cache) { 61695093e3SVarun Sethi pr_debug("Couldn't create devinfo cache\n"); 62695093e3SVarun Sethi kmem_cache_destroy(fsl_pamu_domain_cache); 63695093e3SVarun Sethi return -ENOMEM; 64695093e3SVarun Sethi } 65695093e3SVarun Sethi 66695093e3SVarun Sethi return 0; 67695093e3SVarun Sethi } 68695093e3SVarun Sethi 69695093e3SVarun Sethi static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, dma_addr_t iova) 70695093e3SVarun Sethi { 71695093e3SVarun Sethi u32 win_cnt = dma_domain->win_cnt; 72cd70d465SEmil Medve struct dma_window *win_ptr = &dma_domain->win_arr[0]; 73695093e3SVarun Sethi struct iommu_domain_geometry *geom; 74695093e3SVarun Sethi 758d4bfe40SJoerg Roedel geom = &dma_domain->iommu_domain.geometry; 76695093e3SVarun Sethi 77695093e3SVarun Sethi if (!win_cnt || !dma_domain->geom_size) { 78695093e3SVarun Sethi pr_debug("Number of windows/geometry not configured for the domain\n"); 79695093e3SVarun Sethi return 0; 80695093e3SVarun Sethi } 81695093e3SVarun Sethi 82695093e3SVarun Sethi if (win_cnt > 1) { 83695093e3SVarun Sethi u64 subwin_size; 84695093e3SVarun Sethi dma_addr_t subwin_iova; 85695093e3SVarun Sethi u32 wnd; 86695093e3SVarun Sethi 87695093e3SVarun Sethi subwin_size = dma_domain->geom_size >> ilog2(win_cnt); 88695093e3SVarun Sethi subwin_iova = iova & ~(subwin_size - 1); 89695093e3SVarun Sethi wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size); 90695093e3SVarun Sethi win_ptr = &dma_domain->win_arr[wnd]; 91695093e3SVarun Sethi } 92695093e3SVarun Sethi 93695093e3SVarun Sethi if (win_ptr->valid) 94cd70d465SEmil Medve return win_ptr->paddr + (iova & (win_ptr->size - 1)); 95695093e3SVarun Sethi 96695093e3SVarun Sethi return 0; 97695093e3SVarun Sethi } 98695093e3SVarun Sethi 99695093e3SVarun Sethi static int map_subwins(int liodn, struct fsl_dma_domain *dma_domain) 100695093e3SVarun Sethi { 101cd70d465SEmil Medve struct dma_window *sub_win_ptr = &dma_domain->win_arr[0]; 102695093e3SVarun Sethi int i, ret; 103695093e3SVarun Sethi unsigned long rpn, flags; 104695093e3SVarun Sethi 105695093e3SVarun Sethi for (i = 0; i < dma_domain->win_cnt; i++) { 106695093e3SVarun Sethi if (sub_win_ptr[i].valid) { 107cd70d465SEmil Medve rpn = sub_win_ptr[i].paddr >> PAMU_PAGE_SHIFT; 108695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 109695093e3SVarun Sethi ret = pamu_config_spaace(liodn, dma_domain->win_cnt, i, 110695093e3SVarun Sethi sub_win_ptr[i].size, 111695093e3SVarun Sethi ~(u32)0, 112695093e3SVarun Sethi rpn, 113695093e3SVarun Sethi dma_domain->snoop_id, 114695093e3SVarun Sethi dma_domain->stash_id, 115695093e3SVarun Sethi (i > 0) ? 1 : 0, 116695093e3SVarun Sethi sub_win_ptr[i].prot); 117695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 118695093e3SVarun Sethi if (ret) { 119cd70d465SEmil Medve pr_debug("SPAACE configuration failed for liodn %d\n", 120695093e3SVarun Sethi liodn); 121695093e3SVarun Sethi return ret; 122695093e3SVarun Sethi } 123695093e3SVarun Sethi } 124695093e3SVarun Sethi } 125695093e3SVarun Sethi 126695093e3SVarun Sethi return ret; 127695093e3SVarun Sethi } 128695093e3SVarun Sethi 129695093e3SVarun Sethi static int map_win(int liodn, struct fsl_dma_domain *dma_domain) 130695093e3SVarun Sethi { 131695093e3SVarun Sethi int ret; 132695093e3SVarun Sethi struct dma_window *wnd = &dma_domain->win_arr[0]; 1338d4bfe40SJoerg Roedel phys_addr_t wnd_addr = dma_domain->iommu_domain.geometry.aperture_start; 134695093e3SVarun Sethi unsigned long flags; 135695093e3SVarun Sethi 136695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 137695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, wnd_addr, 138695093e3SVarun Sethi wnd->size, 139695093e3SVarun Sethi ~(u32)0, 140695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 141695093e3SVarun Sethi dma_domain->snoop_id, dma_domain->stash_id, 142695093e3SVarun Sethi 0, wnd->prot); 143695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 144695093e3SVarun Sethi if (ret) 145cd70d465SEmil Medve pr_debug("PAACE configuration failed for liodn %d\n", liodn); 146695093e3SVarun Sethi 147695093e3SVarun Sethi return ret; 148695093e3SVarun Sethi } 149695093e3SVarun Sethi 150695093e3SVarun Sethi /* Map the DMA window corresponding to the LIODN */ 151695093e3SVarun Sethi static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain) 152695093e3SVarun Sethi { 153695093e3SVarun Sethi if (dma_domain->win_cnt > 1) 154695093e3SVarun Sethi return map_subwins(liodn, dma_domain); 155695093e3SVarun Sethi else 156695093e3SVarun Sethi return map_win(liodn, dma_domain); 157695093e3SVarun Sethi } 158695093e3SVarun Sethi 159695093e3SVarun Sethi /* Update window/subwindow mapping for the LIODN */ 160695093e3SVarun Sethi static int update_liodn(int liodn, struct fsl_dma_domain *dma_domain, u32 wnd_nr) 161695093e3SVarun Sethi { 162695093e3SVarun Sethi int ret; 163695093e3SVarun Sethi struct dma_window *wnd = &dma_domain->win_arr[wnd_nr]; 164695093e3SVarun Sethi unsigned long flags; 165695093e3SVarun Sethi 166695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 167695093e3SVarun Sethi if (dma_domain->win_cnt > 1) { 168695093e3SVarun Sethi ret = pamu_config_spaace(liodn, dma_domain->win_cnt, wnd_nr, 169695093e3SVarun Sethi wnd->size, 170695093e3SVarun Sethi ~(u32)0, 171695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 172695093e3SVarun Sethi dma_domain->snoop_id, 173695093e3SVarun Sethi dma_domain->stash_id, 174695093e3SVarun Sethi (wnd_nr > 0) ? 1 : 0, 175695093e3SVarun Sethi wnd->prot); 176695093e3SVarun Sethi if (ret) 177cd70d465SEmil Medve pr_debug("Subwindow reconfiguration failed for liodn %d\n", 178cd70d465SEmil Medve liodn); 179695093e3SVarun Sethi } else { 180695093e3SVarun Sethi phys_addr_t wnd_addr; 181695093e3SVarun Sethi 1828d4bfe40SJoerg Roedel wnd_addr = dma_domain->iommu_domain.geometry.aperture_start; 183695093e3SVarun Sethi 184695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, wnd_addr, 185695093e3SVarun Sethi wnd->size, 186695093e3SVarun Sethi ~(u32)0, 187695093e3SVarun Sethi wnd->paddr >> PAMU_PAGE_SHIFT, 188695093e3SVarun Sethi dma_domain->snoop_id, dma_domain->stash_id, 189695093e3SVarun Sethi 0, wnd->prot); 190695093e3SVarun Sethi if (ret) 191cd70d465SEmil Medve pr_debug("Window reconfiguration failed for liodn %d\n", 192cd70d465SEmil Medve liodn); 193695093e3SVarun Sethi } 194695093e3SVarun Sethi 195695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 196695093e3SVarun Sethi 197695093e3SVarun Sethi return ret; 198695093e3SVarun Sethi } 199695093e3SVarun Sethi 200695093e3SVarun Sethi static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, 201695093e3SVarun Sethi u32 val) 202695093e3SVarun Sethi { 203695093e3SVarun Sethi int ret = 0, i; 204695093e3SVarun Sethi unsigned long flags; 205695093e3SVarun Sethi 206695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 207695093e3SVarun Sethi if (!dma_domain->win_arr) { 208cd70d465SEmil Medve pr_debug("Windows not configured, stash destination update failed for liodn %d\n", 209cd70d465SEmil Medve liodn); 210695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 211695093e3SVarun Sethi return -EINVAL; 212695093e3SVarun Sethi } 213695093e3SVarun Sethi 214695093e3SVarun Sethi for (i = 0; i < dma_domain->win_cnt; i++) { 215695093e3SVarun Sethi ret = pamu_update_paace_stash(liodn, i, val); 216695093e3SVarun Sethi if (ret) { 217cd70d465SEmil Medve pr_debug("Failed to update SPAACE %d field for liodn %d\n ", 218cd70d465SEmil Medve i, liodn); 219695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 220695093e3SVarun Sethi return ret; 221695093e3SVarun Sethi } 222695093e3SVarun Sethi } 223695093e3SVarun Sethi 224695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 225695093e3SVarun Sethi 226695093e3SVarun Sethi return ret; 227695093e3SVarun Sethi } 228695093e3SVarun Sethi 229695093e3SVarun Sethi /* Set the geometry parameters for a LIODN */ 230695093e3SVarun Sethi static int pamu_set_liodn(int liodn, struct device *dev, 231695093e3SVarun Sethi struct fsl_dma_domain *dma_domain, 232695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr, 233695093e3SVarun Sethi u32 win_cnt) 234695093e3SVarun Sethi { 235695093e3SVarun Sethi phys_addr_t window_addr, window_size; 236695093e3SVarun Sethi phys_addr_t subwin_size; 237695093e3SVarun Sethi int ret = 0, i; 238695093e3SVarun Sethi u32 omi_index = ~(u32)0; 239695093e3SVarun Sethi unsigned long flags; 240695093e3SVarun Sethi 241695093e3SVarun Sethi /* 242695093e3SVarun Sethi * Configure the omi_index at the geometry setup time. 243695093e3SVarun Sethi * This is a static value which depends on the type of 244695093e3SVarun Sethi * device and would not change thereafter. 245695093e3SVarun Sethi */ 246695093e3SVarun Sethi get_ome_index(&omi_index, dev); 247695093e3SVarun Sethi 248695093e3SVarun Sethi window_addr = geom_attr->aperture_start; 249695093e3SVarun Sethi window_size = dma_domain->geom_size; 250695093e3SVarun Sethi 251695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 252695093e3SVarun Sethi ret = pamu_disable_liodn(liodn); 253695093e3SVarun Sethi if (!ret) 254695093e3SVarun Sethi ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index, 255695093e3SVarun Sethi 0, dma_domain->snoop_id, 256695093e3SVarun Sethi dma_domain->stash_id, win_cnt, 0); 257695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 258695093e3SVarun Sethi if (ret) { 259cd70d465SEmil Medve pr_debug("PAACE configuration failed for liodn %d, win_cnt =%d\n", 260cd70d465SEmil Medve liodn, win_cnt); 261695093e3SVarun Sethi return ret; 262695093e3SVarun Sethi } 263695093e3SVarun Sethi 264695093e3SVarun Sethi if (win_cnt > 1) { 265695093e3SVarun Sethi subwin_size = window_size >> ilog2(win_cnt); 266695093e3SVarun Sethi for (i = 0; i < win_cnt; i++) { 267695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 268695093e3SVarun Sethi ret = pamu_disable_spaace(liodn, i); 269695093e3SVarun Sethi if (!ret) 270695093e3SVarun Sethi ret = pamu_config_spaace(liodn, win_cnt, i, 271695093e3SVarun Sethi subwin_size, omi_index, 272695093e3SVarun Sethi 0, dma_domain->snoop_id, 273695093e3SVarun Sethi dma_domain->stash_id, 274695093e3SVarun Sethi 0, 0); 275695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 276695093e3SVarun Sethi if (ret) { 277cd70d465SEmil Medve pr_debug("SPAACE configuration failed for liodn %d\n", 278cd70d465SEmil Medve liodn); 279695093e3SVarun Sethi return ret; 280695093e3SVarun Sethi } 281695093e3SVarun Sethi } 282695093e3SVarun Sethi } 283695093e3SVarun Sethi 284695093e3SVarun Sethi return ret; 285695093e3SVarun Sethi } 286695093e3SVarun Sethi 287695093e3SVarun Sethi static int check_size(u64 size, dma_addr_t iova) 288695093e3SVarun Sethi { 289695093e3SVarun Sethi /* 290695093e3SVarun Sethi * Size must be a power of two and at least be equal 291695093e3SVarun Sethi * to PAMU page size. 292695093e3SVarun Sethi */ 293d033f48fSVarun Sethi if ((size & (size - 1)) || size < PAMU_PAGE_SIZE) { 294cd70d465SEmil Medve pr_debug("Size too small or not a power of two\n"); 295695093e3SVarun Sethi return -EINVAL; 296695093e3SVarun Sethi } 297695093e3SVarun Sethi 298695093e3SVarun Sethi /* iova must be page size aligned */ 299695093e3SVarun Sethi if (iova & (size - 1)) { 300cd70d465SEmil Medve pr_debug("Address is not aligned with window size\n"); 301695093e3SVarun Sethi return -EINVAL; 302695093e3SVarun Sethi } 303695093e3SVarun Sethi 304695093e3SVarun Sethi return 0; 305695093e3SVarun Sethi } 306695093e3SVarun Sethi 307695093e3SVarun Sethi static struct fsl_dma_domain *iommu_alloc_dma_domain(void) 308695093e3SVarun Sethi { 309695093e3SVarun Sethi struct fsl_dma_domain *domain; 310695093e3SVarun Sethi 311695093e3SVarun Sethi domain = kmem_cache_zalloc(fsl_pamu_domain_cache, GFP_KERNEL); 312695093e3SVarun Sethi if (!domain) 313695093e3SVarun Sethi return NULL; 314695093e3SVarun Sethi 315695093e3SVarun Sethi domain->stash_id = ~(u32)0; 316695093e3SVarun Sethi domain->snoop_id = ~(u32)0; 317695093e3SVarun Sethi domain->win_cnt = pamu_get_max_subwin_cnt(); 318695093e3SVarun Sethi domain->geom_size = 0; 319695093e3SVarun Sethi 320695093e3SVarun Sethi INIT_LIST_HEAD(&domain->devices); 321695093e3SVarun Sethi 322695093e3SVarun Sethi spin_lock_init(&domain->domain_lock); 323695093e3SVarun Sethi 324695093e3SVarun Sethi return domain; 325695093e3SVarun Sethi } 326695093e3SVarun Sethi 327695093e3SVarun Sethi static void remove_device_ref(struct device_domain_info *info, u32 win_cnt) 328695093e3SVarun Sethi { 329695093e3SVarun Sethi unsigned long flags; 330695093e3SVarun Sethi 331695093e3SVarun Sethi list_del(&info->link); 332695093e3SVarun Sethi spin_lock_irqsave(&iommu_lock, flags); 333695093e3SVarun Sethi if (win_cnt > 1) 334695093e3SVarun Sethi pamu_free_subwins(info->liodn); 335695093e3SVarun Sethi pamu_disable_liodn(info->liodn); 336695093e3SVarun Sethi spin_unlock_irqrestore(&iommu_lock, flags); 337695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 338695093e3SVarun Sethi info->dev->archdata.iommu_domain = NULL; 339695093e3SVarun Sethi kmem_cache_free(iommu_devinfo_cache, info); 340695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 341695093e3SVarun Sethi } 342695093e3SVarun Sethi 343695093e3SVarun Sethi static void detach_device(struct device *dev, struct fsl_dma_domain *dma_domain) 344695093e3SVarun Sethi { 345695093e3SVarun Sethi struct device_domain_info *info, *tmp; 346695093e3SVarun Sethi unsigned long flags; 347695093e3SVarun Sethi 348695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 349695093e3SVarun Sethi /* Remove the device from the domain device list */ 350695093e3SVarun Sethi list_for_each_entry_safe(info, tmp, &dma_domain->devices, link) { 351695093e3SVarun Sethi if (!dev || (info->dev == dev)) 352695093e3SVarun Sethi remove_device_ref(info, dma_domain->win_cnt); 353695093e3SVarun Sethi } 354695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 355695093e3SVarun Sethi } 356695093e3SVarun Sethi 357695093e3SVarun Sethi static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct device *dev) 358695093e3SVarun Sethi { 359695093e3SVarun Sethi struct device_domain_info *info, *old_domain_info; 360695093e3SVarun Sethi unsigned long flags; 361695093e3SVarun Sethi 362695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 363695093e3SVarun Sethi /* 364695093e3SVarun Sethi * Check here if the device is already attached to domain or not. 365695093e3SVarun Sethi * If the device is already attached to a domain detach it. 366695093e3SVarun Sethi */ 36775f0e461SVarun Sethi old_domain_info = dev->archdata.iommu_domain; 368695093e3SVarun Sethi if (old_domain_info && old_domain_info->domain != dma_domain) { 369695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 370695093e3SVarun Sethi detach_device(dev, old_domain_info->domain); 371695093e3SVarun Sethi spin_lock_irqsave(&device_domain_lock, flags); 372695093e3SVarun Sethi } 373695093e3SVarun Sethi 374695093e3SVarun Sethi info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_ATOMIC); 375695093e3SVarun Sethi 376695093e3SVarun Sethi info->dev = dev; 377695093e3SVarun Sethi info->liodn = liodn; 378695093e3SVarun Sethi info->domain = dma_domain; 379695093e3SVarun Sethi 380695093e3SVarun Sethi list_add(&info->link, &dma_domain->devices); 381695093e3SVarun Sethi /* 382695093e3SVarun Sethi * In case of devices with multiple LIODNs just store 383695093e3SVarun Sethi * the info for the first LIODN as all 384695093e3SVarun Sethi * LIODNs share the same domain 385695093e3SVarun Sethi */ 38675f0e461SVarun Sethi if (!dev->archdata.iommu_domain) 387695093e3SVarun Sethi dev->archdata.iommu_domain = info; 388695093e3SVarun Sethi spin_unlock_irqrestore(&device_domain_lock, flags); 389695093e3SVarun Sethi } 390695093e3SVarun Sethi 391695093e3SVarun Sethi static phys_addr_t fsl_pamu_iova_to_phys(struct iommu_domain *domain, 392695093e3SVarun Sethi dma_addr_t iova) 393695093e3SVarun Sethi { 3948d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 395695093e3SVarun Sethi 396cd70d465SEmil Medve if (iova < domain->geometry.aperture_start || 397cd70d465SEmil Medve iova > domain->geometry.aperture_end) 398695093e3SVarun Sethi return 0; 399695093e3SVarun Sethi 400695093e3SVarun Sethi return get_phys_addr(dma_domain, iova); 401695093e3SVarun Sethi } 402695093e3SVarun Sethi 403b7eb6785SJoerg Roedel static bool fsl_pamu_capable(enum iommu_cap cap) 404695093e3SVarun Sethi { 405695093e3SVarun Sethi return cap == IOMMU_CAP_CACHE_COHERENCY; 406695093e3SVarun Sethi } 407695093e3SVarun Sethi 4088d4bfe40SJoerg Roedel static void fsl_pamu_domain_free(struct iommu_domain *domain) 409695093e3SVarun Sethi { 4108d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 411695093e3SVarun Sethi 412695093e3SVarun Sethi /* remove all the devices from the device list */ 413695093e3SVarun Sethi detach_device(NULL, dma_domain); 414695093e3SVarun Sethi 415695093e3SVarun Sethi dma_domain->enabled = 0; 416695093e3SVarun Sethi dma_domain->mapped = 0; 417695093e3SVarun Sethi 418695093e3SVarun Sethi kmem_cache_free(fsl_pamu_domain_cache, dma_domain); 419695093e3SVarun Sethi } 420695093e3SVarun Sethi 4218d4bfe40SJoerg Roedel static struct iommu_domain *fsl_pamu_domain_alloc(unsigned type) 422695093e3SVarun Sethi { 423695093e3SVarun Sethi struct fsl_dma_domain *dma_domain; 424695093e3SVarun Sethi 4258d4bfe40SJoerg Roedel if (type != IOMMU_DOMAIN_UNMANAGED) 4268d4bfe40SJoerg Roedel return NULL; 4278d4bfe40SJoerg Roedel 428695093e3SVarun Sethi dma_domain = iommu_alloc_dma_domain(); 429695093e3SVarun Sethi if (!dma_domain) { 430695093e3SVarun Sethi pr_debug("dma_domain allocation failed\n"); 4318d4bfe40SJoerg Roedel return NULL; 432695093e3SVarun Sethi } 433695093e3SVarun Sethi /* defaul geometry 64 GB i.e. maximum system address */ 4348d4bfe40SJoerg Roedel dma_domain->iommu_domain. geometry.aperture_start = 0; 4358d4bfe40SJoerg Roedel dma_domain->iommu_domain.geometry.aperture_end = (1ULL << 36) - 1; 4368d4bfe40SJoerg Roedel dma_domain->iommu_domain.geometry.force_aperture = true; 437695093e3SVarun Sethi 4388d4bfe40SJoerg Roedel return &dma_domain->iommu_domain; 439695093e3SVarun Sethi } 440695093e3SVarun Sethi 441695093e3SVarun Sethi /* Configure geometry settings for all LIODNs associated with domain */ 442695093e3SVarun Sethi static int pamu_set_domain_geometry(struct fsl_dma_domain *dma_domain, 443695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr, 444695093e3SVarun Sethi u32 win_cnt) 445695093e3SVarun Sethi { 446695093e3SVarun Sethi struct device_domain_info *info; 447695093e3SVarun Sethi int ret = 0; 448695093e3SVarun Sethi 449695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 450695093e3SVarun Sethi ret = pamu_set_liodn(info->liodn, info->dev, dma_domain, 451695093e3SVarun Sethi geom_attr, win_cnt); 452695093e3SVarun Sethi if (ret) 453695093e3SVarun Sethi break; 454695093e3SVarun Sethi } 455695093e3SVarun Sethi 456695093e3SVarun Sethi return ret; 457695093e3SVarun Sethi } 458695093e3SVarun Sethi 459695093e3SVarun Sethi /* Update stash destination for all LIODNs associated with the domain */ 460695093e3SVarun Sethi static int update_domain_stash(struct fsl_dma_domain *dma_domain, u32 val) 461695093e3SVarun Sethi { 462695093e3SVarun Sethi struct device_domain_info *info; 463695093e3SVarun Sethi int ret = 0; 464695093e3SVarun Sethi 465695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 466695093e3SVarun Sethi ret = update_liodn_stash(info->liodn, dma_domain, val); 467695093e3SVarun Sethi if (ret) 468695093e3SVarun Sethi break; 469695093e3SVarun Sethi } 470695093e3SVarun Sethi 471695093e3SVarun Sethi return ret; 472695093e3SVarun Sethi } 473695093e3SVarun Sethi 474695093e3SVarun Sethi /* Update domain mappings for all LIODNs associated with the domain */ 475695093e3SVarun Sethi static int update_domain_mapping(struct fsl_dma_domain *dma_domain, u32 wnd_nr) 476695093e3SVarun Sethi { 477695093e3SVarun Sethi struct device_domain_info *info; 478695093e3SVarun Sethi int ret = 0; 479695093e3SVarun Sethi 480695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 481695093e3SVarun Sethi ret = update_liodn(info->liodn, dma_domain, wnd_nr); 482695093e3SVarun Sethi if (ret) 483695093e3SVarun Sethi break; 484695093e3SVarun Sethi } 485695093e3SVarun Sethi return ret; 486695093e3SVarun Sethi } 487695093e3SVarun Sethi 488695093e3SVarun Sethi static int disable_domain_win(struct fsl_dma_domain *dma_domain, u32 wnd_nr) 489695093e3SVarun Sethi { 490695093e3SVarun Sethi struct device_domain_info *info; 491695093e3SVarun Sethi int ret = 0; 492695093e3SVarun Sethi 493695093e3SVarun Sethi list_for_each_entry(info, &dma_domain->devices, link) { 494695093e3SVarun Sethi if (dma_domain->win_cnt == 1 && dma_domain->enabled) { 495695093e3SVarun Sethi ret = pamu_disable_liodn(info->liodn); 496695093e3SVarun Sethi if (!ret) 497695093e3SVarun Sethi dma_domain->enabled = 0; 498695093e3SVarun Sethi } else { 499695093e3SVarun Sethi ret = pamu_disable_spaace(info->liodn, wnd_nr); 500695093e3SVarun Sethi } 501695093e3SVarun Sethi } 502695093e3SVarun Sethi 503695093e3SVarun Sethi return ret; 504695093e3SVarun Sethi } 505695093e3SVarun Sethi 506695093e3SVarun Sethi static void fsl_pamu_window_disable(struct iommu_domain *domain, u32 wnd_nr) 507695093e3SVarun Sethi { 5088d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 509695093e3SVarun Sethi unsigned long flags; 510695093e3SVarun Sethi int ret; 511695093e3SVarun Sethi 512695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 513695093e3SVarun Sethi if (!dma_domain->win_arr) { 514695093e3SVarun Sethi pr_debug("Number of windows not configured\n"); 515695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 516695093e3SVarun Sethi return; 517695093e3SVarun Sethi } 518695093e3SVarun Sethi 519695093e3SVarun Sethi if (wnd_nr >= dma_domain->win_cnt) { 520695093e3SVarun Sethi pr_debug("Invalid window index\n"); 521695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 522695093e3SVarun Sethi return; 523695093e3SVarun Sethi } 524695093e3SVarun Sethi 525695093e3SVarun Sethi if (dma_domain->win_arr[wnd_nr].valid) { 526695093e3SVarun Sethi ret = disable_domain_win(dma_domain, wnd_nr); 527695093e3SVarun Sethi if (!ret) { 528695093e3SVarun Sethi dma_domain->win_arr[wnd_nr].valid = 0; 529695093e3SVarun Sethi dma_domain->mapped--; 530695093e3SVarun Sethi } 531695093e3SVarun Sethi } 532695093e3SVarun Sethi 533695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 534695093e3SVarun Sethi } 535695093e3SVarun Sethi 536695093e3SVarun Sethi static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr, 537695093e3SVarun Sethi phys_addr_t paddr, u64 size, int prot) 538695093e3SVarun Sethi { 5398d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 540695093e3SVarun Sethi struct dma_window *wnd; 541695093e3SVarun Sethi int pamu_prot = 0; 542695093e3SVarun Sethi int ret; 543695093e3SVarun Sethi unsigned long flags; 544695093e3SVarun Sethi u64 win_size; 545695093e3SVarun Sethi 546695093e3SVarun Sethi if (prot & IOMMU_READ) 547695093e3SVarun Sethi pamu_prot |= PAACE_AP_PERMS_QUERY; 548695093e3SVarun Sethi if (prot & IOMMU_WRITE) 549695093e3SVarun Sethi pamu_prot |= PAACE_AP_PERMS_UPDATE; 550695093e3SVarun Sethi 551695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 552695093e3SVarun Sethi if (!dma_domain->win_arr) { 553695093e3SVarun Sethi pr_debug("Number of windows not configured\n"); 554695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 555695093e3SVarun Sethi return -ENODEV; 556695093e3SVarun Sethi } 557695093e3SVarun Sethi 558695093e3SVarun Sethi if (wnd_nr >= dma_domain->win_cnt) { 559695093e3SVarun Sethi pr_debug("Invalid window index\n"); 560695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 561695093e3SVarun Sethi return -EINVAL; 562695093e3SVarun Sethi } 563695093e3SVarun Sethi 564695093e3SVarun Sethi win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt); 565695093e3SVarun Sethi if (size > win_size) { 566695093e3SVarun Sethi pr_debug("Invalid window size\n"); 567695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 568695093e3SVarun Sethi return -EINVAL; 569695093e3SVarun Sethi } 570695093e3SVarun Sethi 571695093e3SVarun Sethi if (dma_domain->win_cnt == 1) { 572695093e3SVarun Sethi if (dma_domain->enabled) { 573695093e3SVarun Sethi pr_debug("Disable the window before updating the mapping\n"); 574695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 575695093e3SVarun Sethi return -EBUSY; 576695093e3SVarun Sethi } 577695093e3SVarun Sethi 578695093e3SVarun Sethi ret = check_size(size, domain->geometry.aperture_start); 579695093e3SVarun Sethi if (ret) { 580695093e3SVarun Sethi pr_debug("Aperture start not aligned to the size\n"); 581695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 582695093e3SVarun Sethi return -EINVAL; 583695093e3SVarun Sethi } 584695093e3SVarun Sethi } 585695093e3SVarun Sethi 586695093e3SVarun Sethi wnd = &dma_domain->win_arr[wnd_nr]; 587695093e3SVarun Sethi if (!wnd->valid) { 588695093e3SVarun Sethi wnd->paddr = paddr; 589695093e3SVarun Sethi wnd->size = size; 590695093e3SVarun Sethi wnd->prot = pamu_prot; 591695093e3SVarun Sethi 592695093e3SVarun Sethi ret = update_domain_mapping(dma_domain, wnd_nr); 593695093e3SVarun Sethi if (!ret) { 594695093e3SVarun Sethi wnd->valid = 1; 595695093e3SVarun Sethi dma_domain->mapped++; 596695093e3SVarun Sethi } 597695093e3SVarun Sethi } else { 598695093e3SVarun Sethi pr_debug("Disable the window before updating the mapping\n"); 599695093e3SVarun Sethi ret = -EBUSY; 600695093e3SVarun Sethi } 601695093e3SVarun Sethi 602695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 603695093e3SVarun Sethi 604695093e3SVarun Sethi return ret; 605695093e3SVarun Sethi } 606695093e3SVarun Sethi 607695093e3SVarun Sethi /* 608695093e3SVarun Sethi * Attach the LIODN to the DMA domain and configure the geometry 609695093e3SVarun Sethi * and window mappings. 610695093e3SVarun Sethi */ 611695093e3SVarun Sethi static int handle_attach_device(struct fsl_dma_domain *dma_domain, 612695093e3SVarun Sethi struct device *dev, const u32 *liodn, 613695093e3SVarun Sethi int num) 614695093e3SVarun Sethi { 615695093e3SVarun Sethi unsigned long flags; 6168d4bfe40SJoerg Roedel struct iommu_domain *domain = &dma_domain->iommu_domain; 617695093e3SVarun Sethi int ret = 0; 618695093e3SVarun Sethi int i; 619695093e3SVarun Sethi 620695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 621695093e3SVarun Sethi for (i = 0; i < num; i++) { 622695093e3SVarun Sethi /* Ensure that LIODN value is valid */ 623695093e3SVarun Sethi if (liodn[i] >= PAACE_NUMBER_ENTRIES) { 624695093e3SVarun Sethi pr_debug("Invalid liodn %d, attach device failed for %s\n", 625695093e3SVarun Sethi liodn[i], dev->of_node->full_name); 626695093e3SVarun Sethi ret = -EINVAL; 627695093e3SVarun Sethi break; 628695093e3SVarun Sethi } 629695093e3SVarun Sethi 630695093e3SVarun Sethi attach_device(dma_domain, liodn[i], dev); 631695093e3SVarun Sethi /* 632695093e3SVarun Sethi * Check if geometry has already been configured 633695093e3SVarun Sethi * for the domain. If yes, set the geometry for 634695093e3SVarun Sethi * the LIODN. 635695093e3SVarun Sethi */ 636695093e3SVarun Sethi if (dma_domain->win_arr) { 637695093e3SVarun Sethi u32 win_cnt = dma_domain->win_cnt > 1 ? dma_domain->win_cnt : 0; 638cd70d465SEmil Medve 639695093e3SVarun Sethi ret = pamu_set_liodn(liodn[i], dev, dma_domain, 640cd70d465SEmil Medve &domain->geometry, win_cnt); 641695093e3SVarun Sethi if (ret) 642695093e3SVarun Sethi break; 643695093e3SVarun Sethi if (dma_domain->mapped) { 644695093e3SVarun Sethi /* 645695093e3SVarun Sethi * Create window/subwindow mapping for 646695093e3SVarun Sethi * the LIODN. 647695093e3SVarun Sethi */ 648695093e3SVarun Sethi ret = map_liodn(liodn[i], dma_domain); 649695093e3SVarun Sethi if (ret) 650695093e3SVarun Sethi break; 651695093e3SVarun Sethi } 652695093e3SVarun Sethi } 653695093e3SVarun Sethi } 654695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 655695093e3SVarun Sethi 656695093e3SVarun Sethi return ret; 657695093e3SVarun Sethi } 658695093e3SVarun Sethi 659695093e3SVarun Sethi static int fsl_pamu_attach_device(struct iommu_domain *domain, 660695093e3SVarun Sethi struct device *dev) 661695093e3SVarun Sethi { 6628d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 663695093e3SVarun Sethi const u32 *liodn; 664695093e3SVarun Sethi u32 liodn_cnt; 665695093e3SVarun Sethi int len, ret = 0; 666695093e3SVarun Sethi struct pci_dev *pdev = NULL; 667695093e3SVarun Sethi struct pci_controller *pci_ctl; 668695093e3SVarun Sethi 669695093e3SVarun Sethi /* 670695093e3SVarun Sethi * Use LIODN of the PCI controller while attaching a 671695093e3SVarun Sethi * PCI device. 672695093e3SVarun Sethi */ 673b3eb76d1SYijing Wang if (dev_is_pci(dev)) { 674695093e3SVarun Sethi pdev = to_pci_dev(dev); 675695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 676695093e3SVarun Sethi /* 677695093e3SVarun Sethi * make dev point to pci controller device 678695093e3SVarun Sethi * so we can get the LIODN programmed by 679695093e3SVarun Sethi * u-boot. 680695093e3SVarun Sethi */ 681695093e3SVarun Sethi dev = pci_ctl->parent; 682695093e3SVarun Sethi } 683695093e3SVarun Sethi 684695093e3SVarun Sethi liodn = of_get_property(dev->of_node, "fsl,liodn", &len); 685695093e3SVarun Sethi if (liodn) { 686695093e3SVarun Sethi liodn_cnt = len / sizeof(u32); 687cd70d465SEmil Medve ret = handle_attach_device(dma_domain, dev, liodn, liodn_cnt); 688695093e3SVarun Sethi } else { 689695093e3SVarun Sethi pr_debug("missing fsl,liodn property at %s\n", 690695093e3SVarun Sethi dev->of_node->full_name); 691695093e3SVarun Sethi ret = -EINVAL; 692695093e3SVarun Sethi } 693695093e3SVarun Sethi 694695093e3SVarun Sethi return ret; 695695093e3SVarun Sethi } 696695093e3SVarun Sethi 697695093e3SVarun Sethi static void fsl_pamu_detach_device(struct iommu_domain *domain, 698695093e3SVarun Sethi struct device *dev) 699695093e3SVarun Sethi { 7008d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 701695093e3SVarun Sethi const u32 *prop; 702695093e3SVarun Sethi int len; 703695093e3SVarun Sethi struct pci_dev *pdev = NULL; 704695093e3SVarun Sethi struct pci_controller *pci_ctl; 705695093e3SVarun Sethi 706695093e3SVarun Sethi /* 707695093e3SVarun Sethi * Use LIODN of the PCI controller while detaching a 708695093e3SVarun Sethi * PCI device. 709695093e3SVarun Sethi */ 710b3eb76d1SYijing Wang if (dev_is_pci(dev)) { 711695093e3SVarun Sethi pdev = to_pci_dev(dev); 712695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 713695093e3SVarun Sethi /* 714695093e3SVarun Sethi * make dev point to pci controller device 715695093e3SVarun Sethi * so we can get the LIODN programmed by 716695093e3SVarun Sethi * u-boot. 717695093e3SVarun Sethi */ 718695093e3SVarun Sethi dev = pci_ctl->parent; 719695093e3SVarun Sethi } 720695093e3SVarun Sethi 721695093e3SVarun Sethi prop = of_get_property(dev->of_node, "fsl,liodn", &len); 722695093e3SVarun Sethi if (prop) 723695093e3SVarun Sethi detach_device(dev, dma_domain); 724695093e3SVarun Sethi else 725695093e3SVarun Sethi pr_debug("missing fsl,liodn property at %s\n", 726695093e3SVarun Sethi dev->of_node->full_name); 727695093e3SVarun Sethi } 728695093e3SVarun Sethi 729695093e3SVarun Sethi static int configure_domain_geometry(struct iommu_domain *domain, void *data) 730695093e3SVarun Sethi { 731695093e3SVarun Sethi struct iommu_domain_geometry *geom_attr = data; 7328d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 733695093e3SVarun Sethi dma_addr_t geom_size; 734695093e3SVarun Sethi unsigned long flags; 735695093e3SVarun Sethi 736695093e3SVarun Sethi geom_size = geom_attr->aperture_end - geom_attr->aperture_start + 1; 737695093e3SVarun Sethi /* 738695093e3SVarun Sethi * Sanity check the geometry size. Also, we do not support 739695093e3SVarun Sethi * DMA outside of the geometry. 740695093e3SVarun Sethi */ 741695093e3SVarun Sethi if (check_size(geom_size, geom_attr->aperture_start) || 742695093e3SVarun Sethi !geom_attr->force_aperture) { 743695093e3SVarun Sethi pr_debug("Invalid PAMU geometry attributes\n"); 744695093e3SVarun Sethi return -EINVAL; 745695093e3SVarun Sethi } 746695093e3SVarun Sethi 747695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 748695093e3SVarun Sethi if (dma_domain->enabled) { 749695093e3SVarun Sethi pr_debug("Can't set geometry attributes as domain is active\n"); 750695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 751695093e3SVarun Sethi return -EBUSY; 752695093e3SVarun Sethi } 753695093e3SVarun Sethi 754695093e3SVarun Sethi /* Copy the domain geometry information */ 755695093e3SVarun Sethi memcpy(&domain->geometry, geom_attr, 756695093e3SVarun Sethi sizeof(struct iommu_domain_geometry)); 757695093e3SVarun Sethi dma_domain->geom_size = geom_size; 758695093e3SVarun Sethi 759695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 760695093e3SVarun Sethi 761695093e3SVarun Sethi return 0; 762695093e3SVarun Sethi } 763695093e3SVarun Sethi 764695093e3SVarun Sethi /* Set the domain stash attribute */ 765695093e3SVarun Sethi static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void *data) 766695093e3SVarun Sethi { 767695093e3SVarun Sethi struct pamu_stash_attribute *stash_attr = data; 768695093e3SVarun Sethi unsigned long flags; 769695093e3SVarun Sethi int ret; 770695093e3SVarun Sethi 771695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 772695093e3SVarun Sethi 773695093e3SVarun Sethi memcpy(&dma_domain->dma_stash, stash_attr, 774695093e3SVarun Sethi sizeof(struct pamu_stash_attribute)); 775695093e3SVarun Sethi 776695093e3SVarun Sethi dma_domain->stash_id = get_stash_id(stash_attr->cache, 777695093e3SVarun Sethi stash_attr->cpu); 778695093e3SVarun Sethi if (dma_domain->stash_id == ~(u32)0) { 779695093e3SVarun Sethi pr_debug("Invalid stash attributes\n"); 780695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 781695093e3SVarun Sethi return -EINVAL; 782695093e3SVarun Sethi } 783695093e3SVarun Sethi 784695093e3SVarun Sethi ret = update_domain_stash(dma_domain, dma_domain->stash_id); 785695093e3SVarun Sethi 786695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 787695093e3SVarun Sethi 788695093e3SVarun Sethi return ret; 789695093e3SVarun Sethi } 790695093e3SVarun Sethi 791695093e3SVarun Sethi /* Configure domain dma state i.e. enable/disable DMA */ 792695093e3SVarun Sethi static int configure_domain_dma_state(struct fsl_dma_domain *dma_domain, bool enable) 793695093e3SVarun Sethi { 794695093e3SVarun Sethi struct device_domain_info *info; 795695093e3SVarun Sethi unsigned long flags; 796695093e3SVarun Sethi int ret; 797695093e3SVarun Sethi 798695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 799695093e3SVarun Sethi 800695093e3SVarun Sethi if (enable && !dma_domain->mapped) { 801695093e3SVarun Sethi pr_debug("Can't enable DMA domain without valid mapping\n"); 802695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 803695093e3SVarun Sethi return -ENODEV; 804695093e3SVarun Sethi } 805695093e3SVarun Sethi 806695093e3SVarun Sethi dma_domain->enabled = enable; 807cd70d465SEmil Medve list_for_each_entry(info, &dma_domain->devices, link) { 808695093e3SVarun Sethi ret = (enable) ? pamu_enable_liodn(info->liodn) : 809695093e3SVarun Sethi pamu_disable_liodn(info->liodn); 810695093e3SVarun Sethi if (ret) 811695093e3SVarun Sethi pr_debug("Unable to set dma state for liodn %d", 812695093e3SVarun Sethi info->liodn); 813695093e3SVarun Sethi } 814695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 815695093e3SVarun Sethi 816695093e3SVarun Sethi return 0; 817695093e3SVarun Sethi } 818695093e3SVarun Sethi 819695093e3SVarun Sethi static int fsl_pamu_set_domain_attr(struct iommu_domain *domain, 820695093e3SVarun Sethi enum iommu_attr attr_type, void *data) 821695093e3SVarun Sethi { 8228d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 823695093e3SVarun Sethi int ret = 0; 824695093e3SVarun Sethi 825695093e3SVarun Sethi switch (attr_type) { 826695093e3SVarun Sethi case DOMAIN_ATTR_GEOMETRY: 827695093e3SVarun Sethi ret = configure_domain_geometry(domain, data); 828695093e3SVarun Sethi break; 829695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_STASH: 830695093e3SVarun Sethi ret = configure_domain_stash(dma_domain, data); 831695093e3SVarun Sethi break; 832695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_ENABLE: 833695093e3SVarun Sethi ret = configure_domain_dma_state(dma_domain, *(int *)data); 834695093e3SVarun Sethi break; 835695093e3SVarun Sethi default: 836695093e3SVarun Sethi pr_debug("Unsupported attribute type\n"); 837695093e3SVarun Sethi ret = -EINVAL; 838695093e3SVarun Sethi break; 839cd70d465SEmil Medve } 840695093e3SVarun Sethi 841695093e3SVarun Sethi return ret; 842695093e3SVarun Sethi } 843695093e3SVarun Sethi 844695093e3SVarun Sethi static int fsl_pamu_get_domain_attr(struct iommu_domain *domain, 845695093e3SVarun Sethi enum iommu_attr attr_type, void *data) 846695093e3SVarun Sethi { 8478d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 848695093e3SVarun Sethi int ret = 0; 849695093e3SVarun Sethi 850695093e3SVarun Sethi switch (attr_type) { 851695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_STASH: 852cd70d465SEmil Medve memcpy(data, &dma_domain->dma_stash, 853695093e3SVarun Sethi sizeof(struct pamu_stash_attribute)); 854695093e3SVarun Sethi break; 855695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMU_ENABLE: 856695093e3SVarun Sethi *(int *)data = dma_domain->enabled; 857695093e3SVarun Sethi break; 858695093e3SVarun Sethi case DOMAIN_ATTR_FSL_PAMUV1: 859695093e3SVarun Sethi *(int *)data = DOMAIN_ATTR_FSL_PAMUV1; 860695093e3SVarun Sethi break; 861695093e3SVarun Sethi default: 862695093e3SVarun Sethi pr_debug("Unsupported attribute type\n"); 863695093e3SVarun Sethi ret = -EINVAL; 864695093e3SVarun Sethi break; 865cd70d465SEmil Medve } 866695093e3SVarun Sethi 867695093e3SVarun Sethi return ret; 868695093e3SVarun Sethi } 869695093e3SVarun Sethi 870695093e3SVarun Sethi static struct iommu_group *get_device_iommu_group(struct device *dev) 871695093e3SVarun Sethi { 872695093e3SVarun Sethi struct iommu_group *group; 873695093e3SVarun Sethi 874695093e3SVarun Sethi group = iommu_group_get(dev); 875695093e3SVarun Sethi if (!group) 876695093e3SVarun Sethi group = iommu_group_alloc(); 877695093e3SVarun Sethi 878695093e3SVarun Sethi return group; 879695093e3SVarun Sethi } 880695093e3SVarun Sethi 881695093e3SVarun Sethi static bool check_pci_ctl_endpt_part(struct pci_controller *pci_ctl) 882695093e3SVarun Sethi { 883695093e3SVarun Sethi u32 version; 884695093e3SVarun Sethi 885695093e3SVarun Sethi /* Check the PCI controller version number by readding BRR1 register */ 886695093e3SVarun Sethi version = in_be32(pci_ctl->cfg_addr + (PCI_FSL_BRR1 >> 2)); 887695093e3SVarun Sethi version &= PCI_FSL_BRR1_VER; 888695093e3SVarun Sethi /* If PCI controller version is >= 0x204 we can partition endpoints */ 889cd70d465SEmil Medve return version >= 0x204; 890695093e3SVarun Sethi } 891695093e3SVarun Sethi 892695093e3SVarun Sethi /* Get iommu group information from peer devices or devices on the parent bus */ 893695093e3SVarun Sethi static struct iommu_group *get_shared_pci_device_group(struct pci_dev *pdev) 894695093e3SVarun Sethi { 895695093e3SVarun Sethi struct pci_dev *tmp; 896695093e3SVarun Sethi struct iommu_group *group; 897695093e3SVarun Sethi struct pci_bus *bus = pdev->bus; 898695093e3SVarun Sethi 899695093e3SVarun Sethi /* 900695093e3SVarun Sethi * Traverese the pci bus device list to get 901695093e3SVarun Sethi * the shared iommu group. 902695093e3SVarun Sethi */ 903695093e3SVarun Sethi while (bus) { 904695093e3SVarun Sethi list_for_each_entry(tmp, &bus->devices, bus_list) { 905695093e3SVarun Sethi if (tmp == pdev) 906695093e3SVarun Sethi continue; 907695093e3SVarun Sethi group = iommu_group_get(&tmp->dev); 908695093e3SVarun Sethi if (group) 909695093e3SVarun Sethi return group; 910695093e3SVarun Sethi } 911695093e3SVarun Sethi 912695093e3SVarun Sethi bus = bus->parent; 913695093e3SVarun Sethi } 914695093e3SVarun Sethi 915695093e3SVarun Sethi return NULL; 916695093e3SVarun Sethi } 917695093e3SVarun Sethi 918695093e3SVarun Sethi static struct iommu_group *get_pci_device_group(struct pci_dev *pdev) 919695093e3SVarun Sethi { 920695093e3SVarun Sethi struct pci_controller *pci_ctl; 921695093e3SVarun Sethi bool pci_endpt_partioning; 922695093e3SVarun Sethi struct iommu_group *group = NULL; 923695093e3SVarun Sethi 924695093e3SVarun Sethi pci_ctl = pci_bus_to_host(pdev->bus); 925695093e3SVarun Sethi pci_endpt_partioning = check_pci_ctl_endpt_part(pci_ctl); 926695093e3SVarun Sethi /* We can partition PCIe devices so assign device group to the device */ 927695093e3SVarun Sethi if (pci_endpt_partioning) { 928d5e58297SJoerg Roedel group = pci_device_group(&pdev->dev); 929695093e3SVarun Sethi 930695093e3SVarun Sethi /* 931695093e3SVarun Sethi * PCIe controller is not a paritionable entity 932695093e3SVarun Sethi * free the controller device iommu_group. 933695093e3SVarun Sethi */ 934695093e3SVarun Sethi if (pci_ctl->parent->iommu_group) 935695093e3SVarun Sethi iommu_group_remove_device(pci_ctl->parent); 936695093e3SVarun Sethi } else { 937695093e3SVarun Sethi /* 938695093e3SVarun Sethi * All devices connected to the controller will share the 939695093e3SVarun Sethi * PCI controllers device group. If this is the first 940695093e3SVarun Sethi * device to be probed for the pci controller, copy the 941695093e3SVarun Sethi * device group information from the PCI controller device 942695093e3SVarun Sethi * node and remove the PCI controller iommu group. 943695093e3SVarun Sethi * For subsequent devices, the iommu group information can 944695093e3SVarun Sethi * be obtained from sibling devices (i.e. from the bus_devices 945695093e3SVarun Sethi * link list). 946695093e3SVarun Sethi */ 947695093e3SVarun Sethi if (pci_ctl->parent->iommu_group) { 948695093e3SVarun Sethi group = get_device_iommu_group(pci_ctl->parent); 949695093e3SVarun Sethi iommu_group_remove_device(pci_ctl->parent); 950cd70d465SEmil Medve } else { 951695093e3SVarun Sethi group = get_shared_pci_device_group(pdev); 952695093e3SVarun Sethi } 953cd70d465SEmil Medve } 954695093e3SVarun Sethi 9553170447cSVarun Sethi if (!group) 9563170447cSVarun Sethi group = ERR_PTR(-ENODEV); 9573170447cSVarun Sethi 958695093e3SVarun Sethi return group; 959695093e3SVarun Sethi } 960695093e3SVarun Sethi 961d5e58297SJoerg Roedel static struct iommu_group *fsl_pamu_device_group(struct device *dev) 962695093e3SVarun Sethi { 9633170447cSVarun Sethi struct iommu_group *group = ERR_PTR(-ENODEV); 964d5e58297SJoerg Roedel int len; 965695093e3SVarun Sethi 966695093e3SVarun Sethi /* 967695093e3SVarun Sethi * For platform devices we allocate a separate group for 968695093e3SVarun Sethi * each of the devices. 969695093e3SVarun Sethi */ 970d5e58297SJoerg Roedel if (dev_is_pci(dev)) 971d5e58297SJoerg Roedel group = get_pci_device_group(to_pci_dev(dev)); 972d5e58297SJoerg Roedel else if (of_get_property(dev->of_node, "fsl,liodn", &len)) 973695093e3SVarun Sethi group = get_device_iommu_group(dev); 974d5e58297SJoerg Roedel 975d5e58297SJoerg Roedel return group; 976695093e3SVarun Sethi } 977695093e3SVarun Sethi 978d5e58297SJoerg Roedel static int fsl_pamu_add_device(struct device *dev) 979d5e58297SJoerg Roedel { 980d5e58297SJoerg Roedel struct iommu_group *group; 981d5e58297SJoerg Roedel 982d5e58297SJoerg Roedel group = iommu_group_get_for_dev(dev); 9833170447cSVarun Sethi if (IS_ERR(group)) 984695093e3SVarun Sethi return PTR_ERR(group); 985695093e3SVarun Sethi 986695093e3SVarun Sethi iommu_group_put(group); 987d5e58297SJoerg Roedel 98868a17f0bSJoerg Roedel iommu_device_link(&pamu_iommu, dev); 98968a17f0bSJoerg Roedel 990d5e58297SJoerg Roedel return 0; 991695093e3SVarun Sethi } 992695093e3SVarun Sethi 993695093e3SVarun Sethi static void fsl_pamu_remove_device(struct device *dev) 994695093e3SVarun Sethi { 99568a17f0bSJoerg Roedel iommu_device_unlink(&pamu_iommu, dev); 996695093e3SVarun Sethi iommu_group_remove_device(dev); 997695093e3SVarun Sethi } 998695093e3SVarun Sethi 999695093e3SVarun Sethi static int fsl_pamu_set_windows(struct iommu_domain *domain, u32 w_count) 1000695093e3SVarun Sethi { 10018d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 1002695093e3SVarun Sethi unsigned long flags; 1003695093e3SVarun Sethi int ret; 1004695093e3SVarun Sethi 1005695093e3SVarun Sethi spin_lock_irqsave(&dma_domain->domain_lock, flags); 1006695093e3SVarun Sethi /* Ensure domain is inactive i.e. DMA should be disabled for the domain */ 1007695093e3SVarun Sethi if (dma_domain->enabled) { 1008695093e3SVarun Sethi pr_debug("Can't set geometry attributes as domain is active\n"); 1009695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1010695093e3SVarun Sethi return -EBUSY; 1011695093e3SVarun Sethi } 1012695093e3SVarun Sethi 1013695093e3SVarun Sethi /* Ensure that the geometry has been set for the domain */ 1014695093e3SVarun Sethi if (!dma_domain->geom_size) { 1015695093e3SVarun Sethi pr_debug("Please configure geometry before setting the number of windows\n"); 1016695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1017695093e3SVarun Sethi return -EINVAL; 1018695093e3SVarun Sethi } 1019695093e3SVarun Sethi 1020695093e3SVarun Sethi /* 1021695093e3SVarun Sethi * Ensure we have valid window count i.e. it should be less than 1022695093e3SVarun Sethi * maximum permissible limit and should be a power of two. 1023695093e3SVarun Sethi */ 1024695093e3SVarun Sethi if (w_count > pamu_get_max_subwin_cnt() || !is_power_of_2(w_count)) { 1025695093e3SVarun Sethi pr_debug("Invalid window count\n"); 1026695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1027695093e3SVarun Sethi return -EINVAL; 1028695093e3SVarun Sethi } 1029695093e3SVarun Sethi 1030695093e3SVarun Sethi ret = pamu_set_domain_geometry(dma_domain, &domain->geometry, 1031cd70d465SEmil Medve w_count > 1 ? w_count : 0); 1032695093e3SVarun Sethi if (!ret) { 1033695093e3SVarun Sethi kfree(dma_domain->win_arr); 1034cd70d465SEmil Medve dma_domain->win_arr = kcalloc(w_count, 1035cd70d465SEmil Medve sizeof(*dma_domain->win_arr), 1036cd70d465SEmil Medve GFP_ATOMIC); 1037695093e3SVarun Sethi if (!dma_domain->win_arr) { 1038695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1039695093e3SVarun Sethi return -ENOMEM; 1040695093e3SVarun Sethi } 1041695093e3SVarun Sethi dma_domain->win_cnt = w_count; 1042695093e3SVarun Sethi } 1043695093e3SVarun Sethi spin_unlock_irqrestore(&dma_domain->domain_lock, flags); 1044695093e3SVarun Sethi 1045695093e3SVarun Sethi return ret; 1046695093e3SVarun Sethi } 1047695093e3SVarun Sethi 1048695093e3SVarun Sethi static u32 fsl_pamu_get_windows(struct iommu_domain *domain) 1049695093e3SVarun Sethi { 10508d4bfe40SJoerg Roedel struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); 1051695093e3SVarun Sethi 1052695093e3SVarun Sethi return dma_domain->win_cnt; 1053695093e3SVarun Sethi } 1054695093e3SVarun Sethi 10553ff2dcc0SJoerg Roedel static const struct iommu_ops fsl_pamu_ops = { 1056b7eb6785SJoerg Roedel .capable = fsl_pamu_capable, 10578d4bfe40SJoerg Roedel .domain_alloc = fsl_pamu_domain_alloc, 10588d4bfe40SJoerg Roedel .domain_free = fsl_pamu_domain_free, 1059695093e3SVarun Sethi .attach_dev = fsl_pamu_attach_device, 1060695093e3SVarun Sethi .detach_dev = fsl_pamu_detach_device, 1061695093e3SVarun Sethi .domain_window_enable = fsl_pamu_window_enable, 1062695093e3SVarun Sethi .domain_window_disable = fsl_pamu_window_disable, 1063695093e3SVarun Sethi .domain_get_windows = fsl_pamu_get_windows, 1064695093e3SVarun Sethi .domain_set_windows = fsl_pamu_set_windows, 1065695093e3SVarun Sethi .iova_to_phys = fsl_pamu_iova_to_phys, 1066695093e3SVarun Sethi .domain_set_attr = fsl_pamu_set_domain_attr, 1067695093e3SVarun Sethi .domain_get_attr = fsl_pamu_get_domain_attr, 1068695093e3SVarun Sethi .add_device = fsl_pamu_add_device, 1069695093e3SVarun Sethi .remove_device = fsl_pamu_remove_device, 1070d5e58297SJoerg Roedel .device_group = fsl_pamu_device_group, 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 10813ff2dcc0SJoerg Roedel ret = iommu_device_sysfs_add(&pamu_iommu, NULL, NULL, "iommu0"); 10823ff2dcc0SJoerg Roedel if (ret) 10833ff2dcc0SJoerg Roedel return ret; 10843ff2dcc0SJoerg Roedel 10853ff2dcc0SJoerg Roedel iommu_device_set_ops(&pamu_iommu, &fsl_pamu_ops); 10863ff2dcc0SJoerg Roedel 10873ff2dcc0SJoerg Roedel ret = iommu_device_register(&pamu_iommu); 10883ff2dcc0SJoerg Roedel if (ret) { 10893ff2dcc0SJoerg Roedel iommu_device_sysfs_remove(&pamu_iommu); 10903ff2dcc0SJoerg Roedel pr_err("Can't register iommu device\n"); 10913ff2dcc0SJoerg Roedel return ret; 10923ff2dcc0SJoerg Roedel } 10933ff2dcc0SJoerg Roedel 1094695093e3SVarun Sethi bus_set_iommu(&platform_bus_type, &fsl_pamu_ops); 1095695093e3SVarun Sethi bus_set_iommu(&pci_bus_type, &fsl_pamu_ops); 1096695093e3SVarun Sethi 1097695093e3SVarun Sethi return ret; 1098695093e3SVarun Sethi } 1099