diff options
| -rw-r--r-- | arch/powerpc/sysdev/fsl_pci.h | 5 | ||||
| -rw-r--r-- | drivers/iommu/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/iommu/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu.c | 1309 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu.h | 410 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu_domain.c | 1172 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu_domain.h | 85 |
7 files changed, 2992 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.h b/arch/powerpc/sysdev/fsl_pci.h index 72b5625..1e01291 100644 --- a/arch/powerpc/sysdev/fsl_pci.h +++ b/arch/powerpc/sysdev/fsl_pci.h @@ -16,6 +16,11 @@ struct platform_device; + +/* FSL PCI controller BRR1 register */ +#define PCI_FSL_BRR1 0xbf8 +#define PCI_FSL_BRR1_VER 0xffff + #define PCIE_LTSSM 0x0404 /* PCIE Link Training and Status */ #define PCIE_LTSSM_L0 0x16 /* L0 state */ #define PCIE_IP_REV_2_2 0x02080202 /* PCIE IP block version Rev2.2 */ diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 820d85c..fe302e3 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -17,6 +17,16 @@ config OF_IOMMU def_bool y depends on OF +config FSL_PAMU + bool "Freescale IOMMU support" + depends on PPC_E500MC + select IOMMU_API + select GENERIC_ALLOCATOR + help + Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. + PAMU can authorize memory access, remap the memory address, and remap I/O + transaction types. + # MSM IOMMU support config MSM_IOMMU bool "MSM IOMMU Support" diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index bbe7041..14c1f47 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o obj-$(CONFIG_SHMOBILE_IOMMU) += shmobile-iommu.o obj-$(CONFIG_SHMOBILE_IPMMU) += shmobile-ipmmu.o +obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c new file mode 100644 index 0000000..a831fee --- /dev/null +++ b/drivers/iommu/fsl_pamu.c @@ -0,0 +1,1309 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#define pr_fmt(fmt) "fsl-pamu: %s: " fmt, __func__ + +#include <linux/init.h> +#include <linux/iommu.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/of_platform.h> +#include <linux/bootmem.h> +#include <linux/genalloc.h> +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/fsl_guts.h> + +#include "fsl_pamu.h" + +/* define indexes for each operation mapping scenario */ +#define OMI_QMAN 0x00 +#define OMI_FMAN 0x01 +#define OMI_QMAN_PRIV 0x02 +#define OMI_CAAM 0x03 + +#define make64(high, low) (((u64)(high) << 32) | (low)) + +struct pamu_isr_data { + void __iomem *pamu_reg_base; /* Base address of PAMU regs*/ + unsigned int count; /* The number of PAMUs */ +}; + +static struct paace *ppaact; +static struct paace *spaact; +static struct ome *omt; + +/* + * Table for matching compatible strings, for device tree + * guts node, for QorIQ SOCs. + * "fsl,qoriq-device-config-2.0" corresponds to T4 & B4 + * SOCs. For the older SOCs "fsl,qoriq-device-config-1.0" + * string would be used. +*/ +static const struct of_device_id guts_device_ids[] = { + { .compatible = "fsl,qoriq-device-config-1.0", }, + { .compatible = "fsl,qoriq-device-config-2.0", }, + {} +}; + + +/* + * Table for matching compatible strings, for device tree + * L3 cache controller node. + * "fsl,t4240-l3-cache-controller" corresponds to T4, + * "fsl,b4860-l3-cache-controller" corresponds to B4 & + * "fsl,p4080-l3-cache-controller" corresponds to other, + * SOCs. +*/ +static const struct of_device_id l3_device_ids[] = { + { .compatible = "fsl,t4240-l3-cache-controller", }, + { .compatible = "fsl,b4860-l3-cache-controller", }, + { .compatible = "fsl,p4080-l3-cache-controller", }, + {} +}; + +/* maximum subwindows permitted per liodn */ +static u32 max_subwindow_count; + +/* Pool for fspi allocation */ +struct gen_pool *spaace_pool; + +/** + * pamu_get_max_subwin_cnt() - Return the maximum supported + * subwindow count per liodn. + * + */ +u32 pamu_get_max_subwin_cnt() +{ + return max_subwindow_count; +} + +/** + * pamu_get_ppaace() - Return the primary PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns the ppace pointer upon success else return + * null. + */ +static struct paace *pamu_get_ppaace(int liodn) +{ + if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) { + pr_debug("PPAACT doesn't exist\n"); + return NULL; + } + + return &ppaact[liodn]; +} + +/** + * pamu_enable_liodn() - Set valid bit of PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_enable_liodn(int liodn) +{ + struct paace *ppaace; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid primary paace entry\n"); + return -ENOENT; + } + + if (!get_bf(ppaace->addr_bitfields, PPAACE_AF_WSE)) { + pr_debug("liodn %d not configured\n", liodn); + return -EINVAL; + } + + /* Ensure that all other stores to the ppaace complete first */ + mb(); + + set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID); + mb(); + + return 0; +} + +/** + * pamu_disable_liodn() - Clears valid bit of PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_disable_liodn(int liodn) +{ + struct paace *ppaace; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid primary paace entry\n"); + return -ENOENT; + } + + set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_INVALID); + mb(); + + return 0; +} + +/* Derive the window size encoding for a particular PAACE entry */ +static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size) +{ + /* Bug if not a power of 2 */ + BUG_ON(!is_power_of_2(addrspace_size)); + + /* window size is 2^(WSE+1) bytes */ + return __ffs(addrspace_size) - 1; +} + +/* Derive the PAACE window count encoding for the subwindow count */ +static unsigned int map_subwindow_cnt_to_wce(u32 subwindow_cnt) +{ + /* window count is 2^(WCE+1) bytes */ + return __ffs(subwindow_cnt) - 1; +} + +/* + * Set the PAACE type as primary and set the coherency required domain + * attribute + */ +static void pamu_init_ppaace(struct paace *ppaace) +{ + set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY); + + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + PAACE_M_COHERENCE_REQ); +} + +/* + * Set the PAACE type as secondary and set the coherency required domain + * attribute. + */ +static void pamu_init_spaace(struct paace *spaace) +{ + set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY); + set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + PAACE_M_COHERENCE_REQ); +} + +/* + * Return the spaace (corresponding to the secondary window index) + * for a particular ppaace. + */ +static struct paace *pamu_get_spaace(struct paace *paace, u32 wnum) +{ + u32 subwin_cnt; + struct paace *spaace = NULL; + + subwin_cnt = 1UL << (get_bf(paace->impl_attr, PAACE_IA_WCE) + 1); + + if (wnum < subwin_cnt) + spaace = &spaact[paace->fspi + wnum]; + else + pr_debug("secondary paace out of bounds\n"); + + return spaace; +} + +/** + * pamu_get_fspi_and_allocate() - Allocates fspi index and reserves subwindows + * required for primary PAACE in the secondary + * PAACE table. + * @subwin_cnt: Number of subwindows to be reserved. + * + * A PPAACE entry may have a number of associated subwindows. A subwindow + * corresponds to a SPAACE entry in the SPAACT table. Each PAACE entry stores + * the index (fspi) of the first SPAACE entry in the SPAACT table. This + * function returns the index of the first SPAACE entry. The remaining + * SPAACE entries are reserved contiguously from that index. + * + * Returns a valid fspi index in the range of 0 - SPAACE_NUMBER_ENTRIES on success. + * If no SPAACE entry is available or the allocator can not reserve the required + * number of contiguous entries function returns ULONG_MAX indicating a failure. + * +*/ +static unsigned long pamu_get_fspi_and_allocate(u32 subwin_cnt) +{ + unsigned long spaace_addr; + + spaace_addr = gen_pool_alloc(spaace_pool, subwin_cnt * sizeof(struct paace)); + if (!spaace_addr) + return ULONG_MAX; + + return (spaace_addr - (unsigned long)spaact) / (sizeof(struct paace)); +} + +/* Release the subwindows reserved for a particular LIODN */ +void pamu_free_subwins(int liodn) +{ + struct paace *ppaace; + u32 subwin_cnt, size; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid liodn entry\n"); + return; + } + + if (get_bf(ppaace->addr_bitfields, PPAACE_AF_MW)) { + subwin_cnt = 1UL << (get_bf(ppaace->impl_attr, PAACE_IA_WCE) + 1); + size = (subwin_cnt - 1) * sizeof(struct paace); + gen_pool_free(spaace_pool, (unsigned long)&spaact[ppaace->fspi], size); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0); + } +} + +/* + * Function used for updating stash destination for the coressponding + * LIODN. + */ +int pamu_update_paace_stash(int liodn, u32 subwin, u32 value) +{ + struct paace *paace; + + paace = pamu_get_ppaace(liodn); + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + if (subwin) { + paace = pamu_get_spaace(paace, subwin - 1); + if (!paace) { + return -ENOENT; + } + } + set_bf(paace->impl_attr, PAACE_IA_CID, value); + + mb(); + + return 0; +} + +/* Disable a subwindow corresponding to the LIODN */ +int pamu_disable_spaace(int liodn, u32 subwin) +{ + struct paace *paace; + + paace = pamu_get_ppaace(liodn); + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + if (subwin) { + paace = pamu_get_spaace(paace, subwin - 1); + if (!paace) { + return -ENOENT; + } + set_bf(paace->addr_bitfields, PAACE_AF_V, + PAACE_V_INVALID); + } else { + set_bf(paace->addr_bitfields, PAACE_AF_AP, + PAACE_AP_PERMS_DENIED); + } + + mb(); + + return 0; +} + + +/** + * pamu_config_paace() - Sets up PPAACE entry for specified liodn + * + * @liodn: Logical IO device number + * @win_addr: starting address of DSA window + * @win-size: size of DSA window + * @omi: Operation mapping index -- if ~omi == 0 then omi not defined + * @rpn: real (true physical) page number + * @stashid: cache stash id for associated cpu -- if ~stashid == 0 then + * stashid not defined + * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then + * snoopid not defined + * @subwin_cnt: number of sub-windows + * @prot: window permissions + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size, + u32 omi, unsigned long rpn, u32 snoopid, u32 stashid, + u32 subwin_cnt, int prot) +{ + struct paace *ppaace; + unsigned long fspi; + + if (!is_power_of_2(win_size) || win_size < PAMU_PAGE_SIZE) { + pr_debug("window size too small or not a power of two %llx\n", win_size); + return -EINVAL; + } + + if (win_addr & (win_size - 1)) { + pr_debug("window address is not aligned with window size\n"); + return -EINVAL; + } + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + return -ENOENT; + } + + /* window size is 2^(WSE+1) bytes */ + set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, + map_addrspace_size_to_wse(win_size)); + + pamu_init_ppaace(ppaace); + + ppaace->wbah = win_addr >> (PAMU_PAGE_SHIFT + 20); + set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, + (win_addr >> PAMU_PAGE_SHIFT)); + + /* set up operation mapping if it's configured */ + if (omi < OME_NUMBER_ENTRIES) { + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = omi; + } else if (~omi != 0) { + pr_debug("bad operation mapping index: %d\n", omi); + return -EINVAL; + } + + /* configure stash id */ + if (~stashid != 0) + set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid); + + /* configure snoop id */ + if (~snoopid != 0) + ppaace->domain_attr.to_host.snpid = snoopid; + + if (subwin_cnt) { + /* The first entry is in the primary PAACE instead */ + fspi = pamu_get_fspi_and_allocate(subwin_cnt - 1); + if (fspi == ULONG_MAX) { + pr_debug("spaace indexes exhausted\n"); + return -EINVAL; + } + + /* window count is 2^(WCE+1) bytes */ + set_bf(ppaace->impl_attr, PAACE_IA_WCE, + map_subwindow_cnt_to_wce(subwin_cnt)); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1); + ppaace->fspi = fspi; + } else { + set_bf(ppaace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE); + ppaace->twbah = rpn >> 20; + set_bf(ppaace->win_bitfields, PAACE_WIN_TWBAL, rpn); + set_bf(ppaace->addr_bitfields, PAACE_AF_AP, prot); + set_bf(ppaace->impl_attr, PAACE_IA_WCE, 0); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0); + } + mb(); + + return 0; +} + +/** + * pamu_config_spaace() - Sets up SPAACE entry for specified subwindow + * + * @liodn: Logical IO device number + * @subwin_cnt: number of sub-windows associated with dma-window + * @subwin: subwindow index + * @subwin_size: size of subwindow + * @omi: Operation mapping index + * @rpn: real (true physical) page number + * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then + * snoopid not defined + * @stashid: cache stash id for associated cpu + * @enable: enable/disable subwindow after reconfiguration + * @prot: sub window permissions + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_config_spaace(int liodn, u32 subwin_cnt, u32 subwin, + phys_addr_t subwin_size, u32 omi, unsigned long rpn, + u32 snoopid, u32 stashid, int enable, int prot) +{ + struct paace *paace; + + + /* setup sub-windows */ + if (!subwin_cnt) { + pr_debug("Invalid subwindow count\n"); + return -EINVAL; + } + + paace = pamu_get_ppaace(liodn); + if (subwin > 0 && subwin < subwin_cnt && paace) { + paace = pamu_get_spaace(paace, subwin - 1); + + if (paace && !(paace->addr_bitfields & PAACE_V_VALID)) { + pamu_init_spaace(paace); + set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn); + } + } + + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + + if (!is_power_of_2(subwin_size) || subwin_size < PAMU_PAGE_SIZE) { + pr_debug("subwindow size out of range, or not a power of 2\n"); + return -EINVAL; + } + + if (rpn == ULONG_MAX) { + pr_debug("real page number out of range\n"); + return -EINVAL; + } + + /* window size is 2^(WSE+1) bytes */ + set_bf(paace->win_bitfields, PAACE_WIN_SWSE, + map_addrspace_size_to_wse(subwin_size)); + + set_bf(paace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE); + paace->twbah = rpn >> 20; + set_bf(paace->win_bitfields, PAACE_WIN_TWBAL, rpn); + set_bf(paace->addr_bitfields, PAACE_AF_AP, prot); + + /* configure snoop id */ + if (~snoopid != 0) + paace->domain_attr.to_host.snpid = snoopid; + + /* set up operation mapping if it's configured */ + if (omi < OME_NUMBER_ENTRIES) { + set_bf(paace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + paace->op_encode.index_ot.omi = omi; + } else if (~omi != 0) { + pr_debug("bad operation mapping index: %d\n", omi); + return -EINVAL; + } + + if (~stashid != 0) + set_bf(paace->impl_attr, PAACE_IA_CID, stashid); + + smp_wmb(); + + if (enable) + set_bf(paace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID); + + mb(); + + return 0; +} + +/** +* get_ome_index() - Returns the index in the operation mapping table +* for device. +* @*omi_index: pointer for storing the index value +* +*/ +void get_ome_index(u32 *omi_index, struct device *dev) +{ + if (of_device_is_compatible(dev->of_node, "fsl,qman-portal")) + *omi_index = OMI_QMAN; + if (of_device_is_compatible(dev->of_node, "fsl,qman")) + *omi_index = OMI_QMAN_PRIV; +} + +/** + * get_stash_id - Returns stash destination id corresponding to a + * cache type and vcpu. + * @stash_dest_hint: L1, L2 or L3 + * @vcpu: vpcu target for a particular cache type. + * + * Returs stash on success or ~(u32)0 on failure. + * + */ +u32 get_stash_id(u32 stash_dest_hint, u32 vcpu) +{ + const u32 *prop; + struct device_node *node; + u32 cache_level; + int len, found = 0; + int i; + + /* Fastpath, exit early if L3/CPC cache is target for stashing */ + if (stash_dest_hint == PAMU_ATTR_CACHE_L3) { + node = of_find_matching_node(NULL, l3_device_ids); + if (node) { + prop = of_get_property(node, "cache-stash-id", 0); + if (!prop) { + pr_debug("missing cache-stash-id at %s\n", node->full_name); + of_node_put(node); + return ~(u32)0; + } + of_node_put(node); + return be32_to_cpup(prop); + } + return ~(u32)0; + } + + for_each_node_by_type(node, "cpu") { + prop = of_get_property(node, "reg", &len); + for (i = 0; i < len / sizeof(u32); i++) { + if (be32_to_cpup(&prop[i]) == vcpu) { + found = 1; + goto found_cpu_node; + } + } + } +found_cpu_node: + + /* find the hwnode that represents the cache */ + for (cache_level = PAMU_ATTR_CACHE_L1; (cache_level < PAMU_ATTR_CACHE_L3) && found; cache_level++) { + if (stash_dest_hint == cache_level) { + prop = of_get_property(node, "cache-stash-id", 0); + if (!prop) { + pr_debug("missing cache-stash-id at %s\n", node->full_name); + of_node_put(node); + return ~(u32)0; + } + of_node_put(node); + return be32_to_cpup(prop); + } + + prop = of_get_property(node, "next-level-cache", 0); + if (!prop) { + pr_debug("can't find next-level-cache at %s\n", + node->full_name); + of_node_put(node); + return ~(u32)0; /* can't traverse any further */ + } + of_node_put(node); + + /* advance to next node in cache hierarchy */ + node = of_find_node_by_phandle(*prop); + if (!node) { + pr_debug("Invalid node for cache hierarchy %s\n", + node->full_name); + return ~(u32)0; + } + } + + pr_debug("stash dest not found for %d on vcpu %d\n", + stash_dest_hint, vcpu); + return ~(u32)0; +} + +/* Identify if the PAACT table entry belongs to QMAN, BMAN or QMAN Portal */ +#define QMAN_PAACE 1 +#define QMAN_PORTAL_PAACE 2 +#define BMAN_PAACE 3 + +/** + * Setup operation mapping and stash destinations for QMAN and QMAN portal. + * Memory accesses to QMAN and BMAN private memory need not be coherent, so + * clear the PAACE entry coherency attribute for them. + */ +static void setup_qbman_paace(struct paace *ppaace, int paace_type) +{ + switch (paace_type) { + case QMAN_PAACE: + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = OMI_QMAN_PRIV; + /* setup QMAN Private data stashing for the L3 cache */ + set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0)); + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + 0); + break; + case QMAN_PORTAL_PAACE: + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = OMI_QMAN; + /*Set DQRR and Frame stashing for the L3 cache */ + set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0)); + break; + case BMAN_PAACE: + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + 0); + break; + } +} + +/** + * Setup the operation mapping table for various devices. This is a static + * table where each table index corresponds to a particular device. PAMU uses + * this table to translate device transaction to appropriate corenet + * transaction. + */ +static void __init setup_omt(struct ome *omt) +{ + struct ome *ome; + + /* Configure OMI_QMAN */ + ome = &omt[OMI_QMAN]; + + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ; + ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSAO; + + ome->moe[IOE_DIRECT0_IDX] = EOE_VALID | EOE_LDEC; + ome->moe[IOE_DIRECT1_IDX] = EOE_VALID | EOE_LDECPE; + + /* Configure OMI_FMAN */ + ome = &omt[OMI_FMAN]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + + /* Configure OMI_QMAN private */ + ome = &omt[OMI_QMAN_PRIV]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA; + ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSA; + + /* Configure OMI_CAAM */ + ome = &omt[OMI_CAAM]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; +} + +/* + * Get the maximum number of PAACT table entries + * and subwindows supported by PAMU + */ +static void get_pamu_cap_values(unsigned long pamu_reg_base) +{ + u32 pc_val; + + pc_val = in_be32((u32 *)(pamu_reg_base + PAMU_PC3)); + /* Maximum number of subwindows per liodn */ + max_subwindow_count = 1 << (1 + PAMU_PC3_MWCE(pc_val)); +} + +/* Setup PAMU registers pointing to PAACT, SPAACT and OMT */ +int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size, + phys_addr_t ppaact_phys, phys_addr_t spaact_phys, + phys_addr_t omt_phys) +{ + u32 *pc; + struct pamu_mmap_regs *pamu_regs; + + pc = (u32 *) (pamu_reg_base + PAMU_PC); + pamu_regs = (struct pamu_mmap_regs *) + (pamu_reg_base + PAMU_MMAP_REGS_BASE); + + /* set up pointers to corenet control blocks */ + + out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys)); + out_be32(&pamu_regs->ppbal, lower_32_bits(ppaact_phys)); + ppaact_phys = ppaact_phys + PAACT_SIZE; + out_be32(&pamu_regs->pplah, upper_32_bits(ppaact_phys)); + out_be32(&pamu_regs->pplal, lower_32_bits(ppaact_phys)); + + out_be32(&pamu_regs->spbah, upper_32_bits(spaact_phys)); + out_be32(&pamu_regs->spbal, lower_32_bits(spaact_phys)); + spaact_phys = spaact_phys + SPAACT_SIZE; + out_be32(&pamu_regs->splah, upper_32_bits(spaact_phys)); + out_be32(&pamu_regs->splal, lower_32_bits(spaact_phys)); + + out_be32(&pamu_regs->obah, upper_32_bits(omt_phys)); + out_be32(&pamu_regs->obal, lower_32_bits(omt_phys)); + omt_phys = omt_phys + OMT_SIZE; + out_be32(&pamu_regs->olah, upper_32_bits(omt_phys)); + out_be32(&pamu_regs->olal, lower_32_bits(omt_phys)); + + /* + * set PAMU enable bit, + * allow ppaact & omt to be cached + * & enable PAMU access violation interrupts. + */ + + out_be32((u32 *)(pamu_reg_base + PAMU_PICS), + PAMU_ACCESS_VIOLATION_ENABLE); + out_be32(pc, PAMU_PC_PE | PAMU_PC_OCE | PAMU_PC_SPCC | PAMU_PC_PPCC); + return 0; +} + +/* Enable all device LIODNS */ +static void __init setup_liodns(void) +{ + int i, len; + struct paace *ppaace; + struct device_node *node = NULL; + const u32 *prop; + + for_each_node_with_property(node, "fsl,liodn") { + prop = of_get_property(node, "fsl,liodn", &len); + for (i = 0; i < len / sizeof(u32); i++) { + int liodn; + + liodn = be32_to_cpup(&prop[i]); + if (liodn >= PAACE_NUMBER_ENTRIES) { + pr_debug("Invalid LIODN value %d\n", liodn); + continue; + } + ppaace = pamu_get_ppaace(liodn); + pamu_init_ppaace(ppaace); + /* window size is 2^(WSE+1) bytes */ + set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35); + ppaace->wbah = 0; + set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0); + set_bf(ppaace->impl_attr, PAACE_IA_ATM, + PAACE_ATM_NO_XLATE); + set_bf(ppaace->addr_bitfields, PAACE_AF_AP, + PAACE_AP_PERMS_ALL); + if (of_device_is_compatible(node, "fsl,qman-portal")) + setup_qbman_paace(ppaace, QMAN_PORTAL_PAACE); + if (of_device_is_compatible(node, "fsl,qman")) + setup_qbman_paace(ppaace, QMAN_PAACE); + if (of_device_is_compatible(node, "fsl,bman")) + setup_qbman_paace(ppaace, BMAN_PAACE); + mb(); + pamu_enable_liodn(liodn); + } + } +} + +irqreturn_t pamu_av_isr(int irq, void *arg) +{ + struct pamu_isr_data *data = arg; + phys_addr_t phys; + unsigned int i, j, ret; + + pr_emerg("fsl-pamu: access violation interrupt\n"); + + for (i = 0; i < data->count; i++) { + void __iomem *p = data->pamu_reg_base + i * PAMU_OFFSET; + u32 pics = in_be32(p + PAMU_PICS); + + if (pics & PAMU_ACCESS_VIOLATION_STAT) { + u32 avs1 = in_be32(p + PAMU_AVS1); + struct paace *paace; + + pr_emerg("POES1=%08x\n", in_be32(p + PAMU_POES1)); + pr_emerg("POES2=%08x\n", in_be32(p + PAMU_POES2)); + pr_emerg("AVS1=%08x\n", avs1); + pr_emerg("AVS2=%08x\n", in_be32(p + PAMU_AVS2)); + pr_emerg("AVA=%016llx\n", make64(in_be32(p + PAMU_AVAH), + in_be32(p + PAMU_AVAL))); + pr_emerg("UDAD=%08x\n", in_be32(p + PAMU_UDAD)); + pr_emerg("POEA=%016llx\n", make64(in_be32(p + PAMU_POEAH), + in_be32(p + PAMU_POEAL))); + + phys = make64(in_be32(p + PAMU_POEAH), + in_be32(p + PAMU_POEAL)); + + /* Assume that POEA points to a PAACE */ + if (phys) { + u32 *paace = phys_to_virt(phys); + + /* Only the first four words are relevant */ + for (j = 0; j < 4; j++) + pr_emerg("PAACE[%u]=%08x\n", j, in_be32(paace + j)); + } + + /* clear access violation condition */ + out_be32((p + PAMU_AVS1), avs1 & PAMU_AV_MASK); + paace = pamu_get_ppaace(avs1 >> PAMU_AVS1_LIODN_SHIFT); + BUG_ON(!paace); + /* check if we got a violation for a disabled LIODN */ + if (!get_bf(paace->addr_bitfields, PAACE_AF_V)) { + /* + * As per hardware erratum A-003638, access + * violation can be reported for a disabled + * LIODN. If we hit that condition, disable + * access violation reporting. + */ + pics &= ~PAMU_ACCESS_VIOLATION_ENABLE; + } else { + /* Disable the LIODN */ + ret = pamu_disable_liodn(avs1 >> PAMU_AVS1_LIODN_SHIFT); + BUG_ON(ret); + pr_emerg("Disabling liodn %x\n", avs1 >> PAMU_AVS1_LIODN_SHIFT); + } + out_be32((p + PAMU_PICS), pics); + } + } + + + return IRQ_HANDLED; +} + +#define LAWAR_EN 0x80000000 +#define LAWAR_TARGET_MASK 0x0FF00000 +#define LAWAR_TARGET_SHIFT 20 +#define LAWAR_SIZE_MASK 0x0000003F +#define LAWAR_CSDID_MASK 0x000FF000 +#define LAWAR_CSDID_SHIFT 12 + +#define LAW_SIZE_4K 0xb + +struct ccsr_law { + u32 lawbarh; /* LAWn base address high */ + u32 lawbarl; /* LAWn base address low */ + u32 lawar; /* LAWn attributes */ + u32 reserved; +}; + +/* + * Create a coherence subdomain for a given memory block. + */ +static int __init create_csd(phys_addr_t phys, size_t size, u32 csd_port_id) +{ + struct device_node *np; + const __be32 *iprop; + void __iomem *lac = NULL; /* Local Access Control registers */ + struct ccsr_law __iomem *law; + void __iomem *ccm = NULL; + u32 __iomem *csdids; + unsigned int i, num_laws, num_csds; + u32 law_target = 0; + u32 csd_id = 0; + int ret = 0; + + np = of_find_compatible_node(NULL, NULL, "fsl,corenet-law"); + if (!np) + return -ENODEV; + + iprop = of_get_property(np, "fsl,num-laws", NULL); + if (!iprop) { + ret = -ENODEV; + goto error; + } + + num_laws = be32_to_cpup(iprop); + if (!num_laws) { + ret = -ENODEV; + goto error; + } + + lac = of_iomap(np, 0); + if (!lac) { + ret = -ENODEV; + goto error; + } + + /* LAW registers are at offset 0xC00 */ + law = lac + 0xC00; + + of_node_put(np); + + np = of_find_compatible_node(NULL, NULL, "fsl,corenet-cf"); + if (!np) { + ret = -ENODEV; + goto error; + } + + iprop = of_get_property(np, "fsl,ccf-num-csdids", NULL); + if (!iprop) { + ret = -ENODEV; + goto error; + } + + num_csds = be32_to_cpup(iprop); + if (!num_csds) { + ret = -ENODEV; + goto error; + } + + ccm = of_iomap(np, 0); + if (!ccm) { + ret = -ENOMEM; + goto error; + } + + /* The undocumented CSDID registers are at offset 0x600 */ + csdids = ccm + 0x600; + + of_node_put(np); + np = NULL; + + /* Find an unused coherence subdomain ID */ + for (csd_id = 0; csd_id < num_csds; csd_id++) { + if (!csdids[csd_id]) + break; + } + + /* Store the Port ID in the (undocumented) proper CIDMRxx register */ + csdids[csd_id] = csd_port_id; + + /* Find the DDR LAW that maps to our buffer. */ + for (i = 0; i < num_laws; i++) { + if (law[i].lawar & LAWAR_EN) { + phys_addr_t law_start, law_end; + + law_start = make64(law[i].lawbarh, law[i].lawbarl); + law_end = law_start + + (2ULL << (law[i].lawar & LAWAR_SIZE_MASK)); + + if (law_start <= phys && phys < law_end) { + law_target = law[i].lawar & LAWAR_TARGET_MASK; + break; + } + } + } + + if (i == 0 || i == num_laws) { + /* This should never happen*/ + ret = -ENOENT; + goto error; + } + + /* Find a free LAW entry */ + while (law[--i].lawar & LAWAR_EN) { + if (i == 0) { + /* No higher priority LAW slots available */ + ret = -ENOENT; + goto error; + } + } + + law[i].lawbarh = upper_32_bits(phys); + law[i].lawbarl = lower_32_bits(phys); + wmb(); + law[i].lawar = LAWAR_EN | law_target | (csd_id << LAWAR_CSDID_SHIFT) | + (LAW_SIZE_4K + get_order(size)); + wmb(); + +error: + if (ccm) + iounmap(ccm); + + if (lac) + iounmap(lac); + + if (np) + of_node_put(np); + + return ret; +} + +/* + * Table of SVRs and the corresponding PORT_ID values. Port ID corresponds to a + * bit map of snoopers for a given range of memory mapped by a LAW. + * + * All future CoreNet-enabled SOCs will have this erratum(A-004510) fixed, so this + * table should never need to be updated. SVRs are guaranteed to be unique, so + * there is no worry that a future SOC will inadvertently have one of these + * values. + */ +static const struct { + u32 svr; + u32 port_id; +} port_id_map[] = { + {0x82100010, 0xFF000000}, /* P2040 1.0 */ + {0x82100011, 0xFF000000}, /* P2040 1.1 */ + {0x82100110, 0xFF000000}, /* P2041 1.0 */ + {0x82100111, 0xFF000000}, /* P2041 1.1 */ + {0x82110310, 0xFF000000}, /* P3041 1.0 */ + {0x82110311, 0xFF000000}, /* P3041 1.1 */ + {0x82010020, 0xFFF80000}, /* P4040 2.0 */ + {0x82000020, 0xFFF80000}, /* P4080 2.0 */ + {0x82210010, 0xFC000000}, /* P5010 1.0 */ + {0x82210020, 0xFC000000}, /* P5010 2.0 */ + {0x82200010, 0xFC000000}, /* P5020 1.0 */ + {0x82050010, 0xFF800000}, /* P5021 1.0 */ + {0x82040010, 0xFF800000}, /* P5040 1.0 */ +}; + +#define SVR_SECURITY 0x80000 /* The Security (E) bit */ + +static int __init fsl_pamu_probe(struct platform_device *pdev) +{ + void __iomem *pamu_regs = NULL; + struct ccsr_guts __iomem *guts_regs = NULL; + u32 pamubypenr, pamu_counter; + unsigned long pamu_reg_off; + unsigned long pamu_reg_base; + struct pamu_isr_data *data = NULL; + struct device_node *guts_node; + u64 size; + struct page *p; + int ret = 0; + int irq; + phys_addr_t ppaact_phys; + phys_addr_t spaact_phys; + phys_addr_t omt_phys; + size_t mem_size = 0; + unsigned int order = 0; + u32 csd_port_id = 0; + unsigned i; + /* + * enumerate all PAMUs and allocate and setup PAMU tables + * for each of them, + * NOTE : All PAMUs share the same LIODN tables. + */ + + pamu_regs = of_iomap(pdev->dev.of_node, 0); + if (!pamu_regs) { + dev_err(&pdev->dev, "ioremap of PAMU node failed\n"); + return -ENOMEM; + } + of_get_address(pdev->dev.of_node, 0, &size, NULL); + + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (irq == NO_IRQ) { + dev_warn(&pdev->dev, "no interrupts listed in PAMU node\n"); + goto error; + } + + data = kzalloc(sizeof(struct pamu_isr_data), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, "PAMU isr data memory allocation failed\n"); + ret = -ENOMEM; + goto error; + } + data->pamu_reg_base = pamu_regs; + data->count = size / PAMU_OFFSET; + + /* The ISR needs access to the regs, so we won't iounmap them */ + ret = request_irq(irq, pamu_av_isr, 0, "pamu", data); + if (ret < 0) { + dev_err(&pdev->dev, "error %i installing ISR for irq %i\n", + ret, irq); + goto error; + } + + guts_node = of_find_matching_node(NULL, guts_device_ids); + if (!guts_node) { + dev_err(&pdev->dev, "could not find GUTS node %s\n", + pdev->dev.of_node->full_name); + ret = -ENODEV; + goto error; + } + + guts_regs = of_iomap(guts_node, 0); + of_node_put(guts_node); + if (!guts_regs) { + dev_err(&pdev->dev, "ioremap of GUTS node failed\n"); + ret = -ENODEV; + goto error; + } + + /* read in the PAMU capability registers */ + get_pamu_cap_values((unsigned long)pamu_regs); + /* + * To simplify the allocation of a coherency domain, we allocate the + * PAACT and the OMT in the same memory buffer. Unfortunately, this + * wastes more memory compared to allocating the buffers separately. + */ + /* Determine how much memory we need */ + mem_size = (PAGE_SIZE << get_order(PAACT_SIZE)) + + (PAGE_SIZE << get_order(SPAACT_SIZE)) + + (PAGE_SIZE << get_order(OMT_SIZE)); + order = get_order(mem_size); + + p = alloc_pages(GFP_KERNEL | __GFP_ZERO, order); + if (!p) { + dev_err(&pdev->dev, "unable to allocate PAACT/SPAACT/OMT block\n"); + ret = -ENOMEM; + goto error; + } + + ppaact = page_address(p); + ppaact_phys = page_to_phys(p); + + /* Make sure the memory is naturally aligned */ + if (ppaact_phys & ((PAGE_SIZE << order) - 1)) { + dev_err(&pdev->dev, "PAACT/OMT block is unaligned\n"); + ret = -ENOMEM; + goto error; + } + + spaact = (void *)ppaact + (PAGE_SIZE << get_order(PAACT_SIZE)); + omt = (void *)spaact + (PAGE_SIZE << get_order(SPAACT_SIZE)); + + dev_dbg(&pdev->dev, "ppaact virt=%p phys=0x%llx\n", ppaact, + (unsigned long long) ppaact_phys); + + /* Check to see if we need to implement the work-around on this SOC */ + + /* Determine the Port ID for our coherence subdomain */ + for (i = 0; i < ARRAY_SIZE(port_id_map); i++) { + if (port_id_map[i].svr == (mfspr(SPRN_SVR) & ~SVR_SECURITY)) { + csd_port_id = port_id_map[i].port_id; + dev_dbg(&pdev->dev, "found matching SVR %08x\n", + port_id_map[i].svr); + break; + } + } + + if (csd_port_id) { + dev_dbg(&pdev->dev, "creating coherency subdomain at address " + "0x%llx, size %zu, port id 0x%08x", ppaact_phys, + mem_size, csd_port_id); + + ret = create_csd(ppaact_phys, mem_size, csd_port_id); + if (ret) { + dev_err(&pdev->dev, "could not create coherence " + "subdomain\n"); + return ret; + } + } + + spaact_phys = virt_to_phys(spaact); + omt_phys = virt_to_phys(omt); + + spaace_pool = gen_pool_create(ilog2(sizeof(struct paace)), -1); + if (!spaace_pool) { + ret = -ENOMEM; + dev_err(&pdev->dev, "PAMU : failed to allocate spaace gen pool\n"); + goto error; + } + + ret = gen_pool_add(spaace_pool, (unsigned long)spaact, SPAACT_SIZE, -1); + if (ret) + goto error_genpool; + + pamubypenr = in_be32(&guts_regs->pamubypenr); + + for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size; + pamu_reg_off += PAMU_OFFSET, pamu_counter >>= 1) { + + pamu_reg_base = (unsigned long) pamu_regs + pamu_reg_off; + setup_one_pamu(pamu_reg_base, pamu_reg_off, ppaact_phys, + spaact_phys, omt_phys); + /* Disable PAMU bypass for this PAMU */ + pamubypenr &= ~pamu_counter; + } + + setup_omt(omt); + + /* Enable all relevant PAMU(s) */ + out_be32(&guts_regs->pamubypenr, pamubypenr); + + iounmap(guts_regs); + + /* Enable DMA for the LIODNs in the device tree*/ + + setup_liodns(); + + return 0; + +error_genpool: + gen_pool_destroy(spaace_pool); + +error: + if (irq != NO_IRQ) + free_irq(irq, data); + + if (data) { + memset(data, 0, sizeof(struct pamu_isr_data)); + kfree(data); + } + + if (pamu_regs) + iounmap(pamu_regs); + + if (guts_regs) + iounmap(guts_regs); + + if (ppaact) + free_pages((unsigned long)ppaact, order); + + ppaact = NULL; + + return ret; +} + +static const struct of_device_id fsl_of_pamu_ids[] = { + { + .compatible = "fsl,p4080-pamu", + }, + { + .compatible = "fsl,pamu", + }, + {}, +}; + +static struct platform_driver fsl_of_pamu_driver = { + .driver = { + .name = "fsl-of-pamu", + .owner = THIS_MODULE, + }, + .probe = fsl_pamu_probe, +}; + +static __init int fsl_pamu_init(void) +{ + struct platform_device *pdev = NULL; + struct device_node *np; + int ret; + + /* + * The normal OF process calls the probe function at some + * indeterminate later time, after most drivers have loaded. This is + * too late for us, because PAMU clients (like the Qman driver) + * depend on PAMU being initialized early. + * + * So instead, we "manually" call our probe function by creating the + * platform devices ourselves. + */ + + /* + * We assume that there is only one PAMU node in the device tree. A + * single PAMU node represents all of the PAMU devices in the SOC + * already. Everything else already makes that assumption, and the + * binding for the PAMU nodes doesn't allow for any parent-child + * relationships anyway. In other words, support for more than one + * PAMU node would require significant changes to a lot of code. + */ + + np = of_find_compatible_node(NULL, NULL, "fsl,pamu"); + if (!np) { + pr_err("fsl-pamu: could not find a PAMU node\n"); + return -ENODEV; + } + + ret = platform_driver_register(&fsl_of_pamu_driver); + if (ret) { + pr_err("fsl-pamu: could not register driver (err=%i)\n", ret); + goto error_driver_register; + } + + pdev = platform_device_alloc("fsl-of-pamu", 0); + if (!pdev) { + pr_err("fsl-pamu: could not allocate device %s\n", + np->full_name); + ret = -ENOMEM; + goto error_device_alloc; + } + pdev->dev.of_node = of_node_get(np); + + ret = pamu_domain_init(); + if (ret) + goto error_device_add; + + ret = platform_device_add(pdev); + if (ret) { + pr_err("fsl-pamu: could not add device %s (err=%i)\n", + np->full_name, ret); + goto error_device_add; + } + + return 0; + +error_device_add: + of_node_put(pdev->dev.of_node); + pdev->dev.of_node = NULL; + + platform_device_put(pdev); + +error_device_alloc: + platform_driver_unregister(&fsl_of_pamu_driver); + +error_driver_register: + of_node_put(np); + + return ret; +} +arch_initcall(fsl_pamu_init); diff --git a/drivers/iommu/fsl_pamu.h b/drivers/iommu/fsl_pamu.h new file mode 100644 index 0000000..8fc1a12 --- /dev/null +++ b/drivers/iommu/fsl_pamu.h @@ -0,0 +1,410 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#ifndef __FSL_PAMU_H +#define __FSL_PAMU_H + +#include <asm/fsl_pamu_stash.h> + +/* Bit Field macros + * v = bit field variable; m = mask, m##_SHIFT = shift, x = value to load + */ +#define set_bf(v, m, x) (v = ((v) & ~(m)) | (((x) << (m##_SHIFT)) & (m))) +#define get_bf(v, m) (((v) & (m)) >> (m##_SHIFT)) + +/* PAMU CCSR space */ +#define PAMU_PGC 0x00000000 /* Allows all peripheral accesses */ +#define PAMU_PE 0x40000000 /* enable PAMU */ + +/* PAMU_OFFSET to the next pamu space in ccsr */ +#define PAMU_OFFSET 0x1000 + +#define PAMU_MMAP_REGS_BASE 0 + +struct pamu_mmap_regs { + u32 ppbah; + u32 ppbal; + u32 pplah; + u32 pplal; + u32 spbah; + u32 spbal; + u32 splah; + u32 splal; + u32 obah; + u32 obal; + u32 olah; + u32 olal; +}; + +/* PAMU Error Registers */ +#define PAMU_POES1 0x0040 +#define PAMU_POES2 0x0044 +#define PAMU_POEAH 0x0048 +#define PAMU_POEAL 0x004C +#define PAMU_AVS1 0x0050 +#define PAMU_AVS1_AV 0x1 +#define PAMU_AVS1_OTV 0x6 +#define PAMU_AVS1_APV 0x78 +#define PAMU_AVS1_WAV 0x380 +#define PAMU_AVS1_LAV 0x1c00 +#define PAMU_AVS1_GCV 0x2000 +#define PAMU_AVS1_PDV 0x4000 +#define PAMU_AV_MASK (PAMU_AVS1_AV | PAMU_AVS1_OTV | PAMU_AVS1_APV | PAMU_AVS1_WAV \ + | PAMU_AVS1_LAV | PAMU_AVS1_GCV | PAMU_AVS1_PDV) +#define PAMU_AVS1_LIODN_SHIFT 16 +#define PAMU_LAV_LIODN_NOT_IN_PPAACT 0x400 + +#define PAMU_AVS2 0x0054 +#define PAMU_AVAH 0x0058 +#define PAMU_AVAL 0x005C +#define PAMU_EECTL 0x0060 +#define PAMU_EEDIS 0x0064 +#define PAMU_EEINTEN 0x0068 +#define PAMU_EEDET 0x006C +#define PAMU_EEATTR 0x0070 +#define PAMU_EEAHI 0x0074 +#define PAMU_EEALO 0x0078 +#define PAMU_EEDHI 0X007C +#define PAMU_EEDLO 0x0080 +#define PAMU_EECC 0x0084 +#define PAMU_UDAD 0x0090 + +/* PAMU Revision Registers */ +#define PAMU_PR1 0x0BF8 +#define PAMU_PR2 0x0BFC + +/* PAMU version mask */ +#define PAMU_PR1_MASK 0xffff + +/* PAMU Capabilities Registers */ +#define PAMU_PC1 0x0C00 +#define PAMU_PC2 0x0C04 +#define PAMU_PC3 0x0C08 +#define PAMU_PC4 0x0C0C + +/* PAMU Control Register */ +#define PAMU_PC 0x0C10 + +/* PAMU control defs */ +#define PAMU_CONTROL 0x0C10 +#define PAMU_PC_PGC 0x80000000 /* PAMU gate closed bit */ +#define PAMU_PC_PE 0x40000000 /* PAMU enable bit */ +#define PAMU_PC_SPCC 0x00000010 /* sPAACE cache enable */ +#define PAMU_PC_PPCC 0x00000001 /* pPAACE cache enable */ +#define PAMU_PC_OCE 0x00001000 /* OMT cache enable */ + +#define PAMU_PFA1 0x0C14 +#define PAMU_PFA2 0x0C18 + +#define PAMU_PC2_MLIODN(X) ((X) >> 16) +#define PAMU_PC3_MWCE(X) (((X) >> 21) & 0xf) + +/* PAMU Interrupt control and Status Register */ +#define PAMU_PICS 0x0C1C +#define PAMU_ACCESS_VIOLATION_STAT 0x8 +#define PAMU_ACCESS_VIOLATION_ENABLE 0x4 + +/* PAMU Debug Registers */ +#define PAMU_PD1 0x0F00 +#define PAMU_PD2 0x0F04 +#define PAMU_PD3 0x0F08 +#define PAMU_PD4 0x0F0C + +#define PAACE_AP_PERMS_DENIED 0x0 +#define PAACE_AP_PERMS_QUERY 0x1 +#define PAACE_AP_PERMS_UPDATE 0x2 +#define PAACE_AP_PERMS_ALL 0x3 + +#define PAACE_DD_TO_HOST 0x0 +#define PAACE_DD_TO_IO 0x1 +#define PAACE_PT_PRIMARY 0x0 +#define PAACE_PT_SECONDARY 0x1 +#define PAACE_V_INVALID 0x0 +#define PAACE_V_VALID 0x1 +#define PAACE_MW_SUBWINDOWS 0x1 + +#define PAACE_WSE_4K 0xB +#define PAACE_WSE_8K 0xC +#define PAACE_WSE_16K 0xD +#define PAACE_WSE_32K 0xE +#define PAACE_WSE_64K 0xF +#define PAACE_WSE_128K 0x10 +#define PAACE_WSE_256K 0x11 +#define PAACE_WSE_512K 0x12 +#define PAACE_WSE_1M 0x13 +#define PAACE_WSE_2M 0x14 +#define PAACE_WSE_4M 0x15 +#define PAACE_WSE_8M 0x16 +#define PAACE_WSE_16M 0x17 +#define PAACE_WSE_32M 0x18 +#define PAACE_WSE_64M 0x19 +#define PAACE_WSE_128M 0x1A +#define PAACE_WSE_256M 0x1B +#define PAACE_WSE_512M 0x1C +#define PAACE_WSE_1G 0x1D +#define PAACE_WSE_2G 0x1E +#define PAACE_WSE_4G 0x1F + +#define PAACE_DID_PCI_EXPRESS_1 0x00 +#define PAACE_DID_PCI_EXPRESS_2 0x01 +#define PAACE_DID_PCI_EXPRESS_3 0x02 +#define PAACE_DID_PCI_EXPRESS_4 0x03 +#define PAACE_DID_LOCAL_BUS 0x04 +#define PAACE_DID_SRIO 0x0C +#define PAACE_DID_MEM_1 0x10 +#define PAACE_DID_MEM_2 0x11 +#define PAACE_DID_MEM_3 0x12 +#define PAACE_DID_MEM_4 0x13 +#define PAACE_DID_MEM_1_2 0x14 +#define PAACE_DID_MEM_3_4 0x15 +#define PAACE_DID_MEM_1_4 0x16 +#define PAACE_DID_BM_SW_PORTAL 0x18 +#define PAACE_DID_PAMU 0x1C +#define PAACE_DID_CAAM 0x21 +#define PAACE_DID_QM_SW_PORTAL 0x3C +#define PAACE_DID_CORE0_INST 0x80 +#define PAACE_DID_CORE0_DATA 0x81 +#define PAACE_DID_CORE1_INST 0x82 +#define PAACE_DID_CORE1_DATA 0x83 +#define PAACE_DID_CORE2_INST 0x84 +#define PAACE_DID_CORE2_DATA 0x85 +#define PAACE_DID_CORE3_INST 0x86 +#define PAACE_DID_CORE3_DATA 0x87 +#define PAACE_DID_CORE4_INST 0x88 +#define PAACE_DID_CORE4_DATA 0x89 +#define PAACE_DID_CORE5_INST 0x8A +#define PAACE_DID_CORE5_DATA 0x8B +#define PAACE_DID_CORE6_INST 0x8C +#define PAACE_DID_CORE6_DATA 0x8D +#define PAACE_DID_CORE7_INST 0x8E +#define PAACE_DID_CORE7_DATA 0x8F +#define PAACE_DID_BROADCAST 0xFF + +#define PAACE_ATM_NO_XLATE 0x00 +#define PAACE_ATM_WINDOW_XLATE 0x01 +#define PAACE_ATM_PAGE_XLATE 0x02 +#define PAACE_ATM_WIN_PG_XLATE \ + (PAACE_ATM_WINDOW_XLATE | PAACE_ATM_PAGE_XLATE) +#define PAACE_OTM_NO_XLATE 0x00 +#define PAACE_OTM_IMMEDIATE 0x01 +#define PAACE_OTM_INDEXED 0x02 +#define PAACE_OTM_RESERVED 0x03 + +#define PAACE_M_COHERENCE_REQ 0x01 + +#define PAACE_PID_0 0x0 +#define PAACE_PID_1 0x1 +#define PAACE_PID_2 0x2 +#define PAACE_PID_3 0x3 +#define PAACE_PID_4 0x4 +#define PAACE_PID_5 0x5 +#define PAACE_PID_6 0x6 +#define PAACE_PID_7 0x7 + +#define PAACE_TCEF_FORMAT0_8B 0x00 +#define PAACE_TCEF_FORMAT1_RSVD 0x01 +/* + * Hard coded value for the PAACT size to accomodate + * maximum LIODN value generated by u-boot. + */ +#define PAACE_NUMBER_ENTRIES 0x500 +/* Hard coded value for the SPAACT size */ +#define SPAACE_NUMBER_ENTRIES 0x800 + +#define OME_NUMBER_ENTRIES 16 + +/* PAACE Bit Field Defines */ +#define PPAACE_AF_WBAL 0xfffff000 +#define PPAACE_AF_WBAL_SHIFT 12 +#define PPAACE_AF_WSE 0x00000fc0 +#define PPAACE_AF_WSE_SHIFT 6 +#define PPAACE_AF_MW 0x00000020 +#define PPAACE_AF_MW_SHIFT 5 + +#define SPAACE_AF_LIODN 0xffff0000 +#define SPAACE_AF_LIODN_SHIFT 16 + +#define PAACE_AF_AP 0x00000018 +#define PAACE_AF_AP_SHIFT 3 +#define PAACE_AF_DD 0x00000004 +#define PAACE_AF_DD_SHIFT 2 +#define PAACE_AF_PT 0x00000002 +#define PAACE_AF_PT_SHIFT 1 +#define PAACE_AF_V 0x00000001 +#define PAACE_AF_V_SHIFT 0 + +#define PAACE_DA_HOST_CR 0x80 +#define PAACE_DA_HOST_CR_SHIFT 7 + +#define PAACE_IA_CID 0x00FF0000 +#define PAACE_IA_CID_SHIFT 16 +#define PAACE_IA_WCE 0x000000F0 +#define PAACE_IA_WCE_SHIFT 4 +#define PAACE_IA_ATM 0x0000000C +#define PAACE_IA_ATM_SHIFT 2 +#define PAACE_IA_OTM 0x00000003 +#define PAACE_IA_OTM_SHIFT 0 + +#define PAACE_WIN_TWBAL 0xfffff000 +#define PAACE_WIN_TWBAL_SHIFT 12 +#define PAACE_WIN_SWSE 0x00000fc0 +#define PAACE_WIN_SWSE_SHIFT 6 + +/* PAMU Data Structures */ +/* primary / secondary paact structure */ +struct paace { + /* PAACE Offset 0x00 */ + u32 wbah; /* only valid for Primary PAACE */ + u32 addr_bitfields; /* See P/S PAACE_AF_* */ + + /* PAACE Offset 0x08 */ + /* Interpretation of first 32 bits dependent on DD above */ + union { + struct { + /* Destination ID, see PAACE_DID_* defines */ + u8 did; + /* Partition ID */ + u8 pid; + /* Snoop ID */ + u8 snpid; + /* coherency_required : 1 reserved : 7 */ + u8 coherency_required; /* See PAACE_DA_* */ + } to_host; + struct { + /* Destination ID, see PAACE_DID_* defines */ + u8 did; + u8 reserved1; + u16 reserved2; + } to_io; + } domain_attr; + + /* Implementation attributes + window count + address & operation translation modes */ + u32 impl_attr; /* See PAACE_IA_* */ + + /* PAACE Offset 0x10 */ + /* Translated window base address */ + u32 twbah; + u32 win_bitfields; /* See PAACE_WIN_* */ + + /* PAACE Offset 0x18 */ + /* first secondary paace entry */ + u32 fspi; /* only valid for Primary PAACE */ + union { + struct { + u8 ioea; + u8 moea; + u8 ioeb; + u8 moeb; + } immed_ot; + struct { + u16 reserved; + u16 omi; + } index_ot; + } op_encode; + + /* PAACE Offsets 0x20-0x38 */ + u32 reserved[8]; /* not currently implemented */ +}; + +/* OME : Operation mapping entry + * MOE : Mapped Operation Encodings + * The operation mapping table is table containing operation mapping entries (OME). + * The index of a particular OME is programmed in the PAACE entry for translation + * in bound I/O operations corresponding to an LIODN. The OMT is used for translation + * specifically in case of the indexed translation mode. Each OME contains a 128 + * byte mapped operation encoding (MOE), where each byte represents an MOE. + */ +#define NUM_MOE 128 +struct ome { + u8 moe[NUM_MOE]; +} __attribute__((packed)); + +#define PAACT_SIZE (sizeof(struct paace) * PAACE_NUMBER_ENTRIES) +#define SPAACT_SIZE (sizeof(struct paace) * SPAACE_NUMBER_ENTRIES) +#define OMT_SIZE (sizeof(struct ome) * OME_NUMBER_ENTRIES) + +#define PAMU_PAGE_SHIFT 12 +#define PAMU_PAGE_SIZE 4096ULL + +#define IOE_READ 0x00 +#define IOE_READ_IDX 0x00 +#define IOE_WRITE 0x81 +#define IOE_WRITE_IDX 0x01 +#define IOE_EREAD0 0x82 /* Enhanced read type 0 */ +#define IOE_EREAD0_IDX 0x02 /* Enhanced read type 0 */ +#define IOE_EWRITE0 0x83 /* Enhanced write type 0 */ +#define IOE_EWRITE0_IDX 0x03 /* Enhanced write type 0 */ +#define IOE_DIRECT0 0x84 /* Directive type 0 */ +#define IOE_DIRECT0_IDX 0x04 /* Directive type 0 */ +#define IOE_EREAD1 0x85 /* Enhanced read type 1 */ +#define IOE_EREAD1_IDX 0x05 /* Enhanced read type 1 */ +#define IOE_EWRITE1 0x86 /* Enhanced write type 1 */ +#define IOE_EWRITE1_IDX 0x06 /* Enhanced write type 1 */ +#define IOE_DIRECT1 0x87 /* Directive type 1 */ +#define IOE_DIRECT1_IDX 0x07 /* Directive type 1 */ +#define IOE_RAC 0x8c /* Read with Atomic clear */ +#define IOE_RAC_IDX 0x0c /* Read with Atomic clear */ +#define IOE_RAS 0x8d /* Read with Atomic set */ +#define IOE_RAS_IDX 0x0d /* Read with Atomic set */ +#define IOE_RAD 0x8e /* Read with Atomic decrement */ +#define IOE_RAD_IDX 0x0e /* Read with Atomic decrement */ +#define IOE_RAI 0x8f /* Read with Atomic increment */ +#define IOE_RAI_IDX 0x0f /* Read with Atomic increment */ + +#define EOE_READ 0x00 +#define EOE_WRITE 0x01 +#define EOE_RAC 0x0c /* Read with Atomic clear */ +#define EOE_RAS 0x0d /* Read with Atomic set */ +#define EOE_RAD 0x0e /* Read with Atomic decrement */ +#define EOE_RAI 0x0f /* Read with Atomic increment */ +#define EOE_LDEC 0x10 /* Load external cache */ +#define EOE_LDECL 0x11 /* Load external cache with stash lock */ +#define EOE_LDECPE 0x12 /* Load external cache with preferred exclusive */ +#define EOE_LDECPEL 0x13 /* Load external cache with preferred exclusive and lock */ +#define EOE_LDECFE 0x14 /* Load external cache with forced exclusive */ +#define EOE_LDECFEL 0x15 /* Load external cache with forced exclusive and lock */ +#define EOE_RSA 0x16 /* Read with stash allocate */ +#define EOE_RSAU 0x17 /* Read with stash allocate and unlock */ +#define EOE_READI 0x18 /* Read with invalidate */ +#define EOE_RWNITC 0x19 /* Read with no intention to cache */ +#define EOE_WCI 0x1a /* Write cache inhibited */ +#define EOE_WWSA 0x1b /* Write with stash allocate */ +#define EOE_WWSAL 0x1c /* Write with stash allocate and lock */ +#define EOE_WWSAO 0x1d /* Write with stash allocate only */ +#define EOE_WWSAOL 0x1e /* Write with stash allocate only and lock */ +#define EOE_VALID 0x80 + +/* Function prototypes */ +int pamu_domain_init(void); +int pamu_enable_liodn(int liodn); +int pamu_disable_liodn(int liodn); +void pamu_free_subwins(int liodn); +int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size, + u32 omi, unsigned long rpn, u32 snoopid, uint32_t stashid, + u32 subwin_cnt, int prot); +int pamu_config_spaace(int liodn, u32 subwin_cnt, u32 subwin_addr, + phys_addr_t subwin_size, u32 omi, unsigned long rpn, + uint32_t snoopid, u32 stashid, int enable, int prot); + +u32 get_stash_id(u32 stash_dest_hint, u32 vcpu); +void get_ome_index(u32 *omi_index, struct device *dev); +int pamu_update_paace_stash(int liodn, u32 subwin, u32 value); +int pamu_disable_spaace(int liodn, u32 subwin); +u32 pamu_get_max_subwin_cnt(void); + +#endif /* __FSL_PAMU_H */ diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c new file mode 100644 index 0000000..14d803a --- /dev/null +++ b/drivers/iommu/fsl_pamu_domain.c @@ -0,0 +1,1172 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * Author: Varun Sethi <varun.sethi@freescale.com> + * + */ + +#define pr_fmt(fmt) "fsl-pamu-domain: %s: " fmt, __func__ + +#include <linux/init.h> +#include <linux/iommu.h> +#include <linux/notifier.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/of_platform.h> +#include <linux/bootmem.h> +#include <linux/err.h> +#include <asm/io.h> +#include <asm/bitops.h> + +#include <asm/pci-bridge.h> +#include <sysdev/fsl_pci.h> + +#include "fsl_pamu_domain.h" +#include "pci.h" + +/* + * Global spinlock that needs to be held while + * configuring PAMU. + */ +static DEFINE_SPINLOCK(iommu_lock); + +static struct kmem_cache *fsl_pamu_domain_cache; +static struct kmem_cache *iommu_devinfo_cache; +static DEFINE_SPINLOCK(device_domain_lock); + +static int __init iommu_init_mempool(void) +{ + + fsl_pamu_domain_cache = kmem_cache_create("fsl_pamu_domain", + sizeof(struct fsl_dma_domain), + 0, + SLAB_HWCACHE_ALIGN, + + NULL); + if (!fsl_pamu_domain_cache) { + pr_debug("Couldn't create fsl iommu_domain cache\n"); + return -ENOMEM; + } + + iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", + sizeof(struct device_domain_info), + 0, + SLAB_HWCACHE_ALIGN, + NULL); + if (!iommu_devinfo_cache) { + pr_debug("Couldn't create devinfo cache\n"); + kmem_cache_destroy(fsl_pamu_domain_cache); + return -ENOMEM; + } + + return 0; +} + +static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, dma_addr_t iova) +{ + u32 win_cnt = dma_domain->win_cnt; + struct dma_window *win_ptr = + &dma_domain->win_arr[0]; + struct iommu_domain_geometry *geom; + + geom = &dma_domain->iommu_domain->geometry; + + if (!win_cnt || !dma_domain->geom_size) { + pr_debug("Number of windows/geometry not configured for the domain\n"); + return 0; + } + + if (win_cnt > 1) { + u64 subwin_size; + dma_addr_t subwin_iova; + u32 wnd; + + subwin_size = dma_domain->geom_size >> ilog2(win_cnt); + subwin_iova = iova & ~(subwin_size - 1); + wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size); + win_ptr = &dma_domain->win_arr[wnd]; + } + + if (win_ptr->valid) + return (win_ptr->paddr + (iova & (win_ptr->size - 1))); + + return 0; +} + +static int map_subwins(int liodn, struct fsl_dma_domain *dma_domain) +{ + struct dma_window *sub_win_ptr = + &dma_domain->win_arr[0]; + int i, ret; + unsigned long rpn, flags; + + for (i = 0; i < dma_domain->win_cnt; i++) { + if (sub_win_ptr[i].valid) { + rpn = sub_win_ptr[i].paddr >> + PAMU_PAGE_SHIFT; + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_config_spaace(liodn, dma_domain->win_cnt, i, + sub_win_ptr[i].size, + ~(u32)0, + rpn, + dma_domain->snoop_id, + dma_domain->stash_id, + (i > 0) ? 1 : 0, + sub_win_ptr[i].prot); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU SPAACE configuration failed for liodn %d\n", + liodn); + return ret; + } + } + } + + return ret; +} + +static int map_win(int liodn, struct fsl_dma_domain *dma_domain) +{ + int ret; + struct dma_window *wnd = &dma_domain->win_arr[0]; + phys_addr_t wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_config_ppaace(liodn, wnd_addr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, dma_domain->stash_id, + 0, wnd->prot); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) + pr_debug("PAMU PAACE configuration failed for liodn %d\n", + liodn); + + return ret; +} + +/* Map the DMA window corresponding to the LIODN */ +static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain) +{ + if (dma_domain->win_cnt > 1) + return map_subwins(liodn, dma_domain); + else + return map_win(liodn, dma_domain); + +} + +/* Update window/subwindow mapping for the LIODN */ +static int update_liodn(int liodn, struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + int ret; + struct dma_window *wnd = &dma_domain->win_arr[wnd_nr]; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + if (dma_domain->win_cnt > 1) { + ret = pamu_config_spaace(liodn, dma_domain->win_cnt, wnd_nr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, + dma_domain->stash_id, + (wnd_nr > 0) ? 1 : 0, + wnd->prot); + if (ret) + pr_debug("Subwindow reconfiguration failed for liodn %d\n", liodn); + } else { + phys_addr_t wnd_addr; + + wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; + + ret = pamu_config_ppaace(liodn, wnd_addr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, dma_domain->stash_id, + 0, wnd->prot); + if (ret) + pr_debug("Window reconfiguration failed for liodn %d\n", liodn); + } + + spin_unlock_irqrestore(&iommu_lock, flags); + + return ret; +} + +static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, + u32 val) +{ + int ret = 0, i; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Windows not configured, stash destination update failed for liodn %d\n", liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + return -EINVAL; + } + + for (i = 0; i < dma_domain->win_cnt; i++) { + ret = pamu_update_paace_stash(liodn, i, val); + if (ret) { + pr_debug("Failed to update SPAACE %d field for liodn %d\n ", i, liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + return ret; + } + } + + spin_unlock_irqrestore(&iommu_lock, flags); + + return ret; +} + +/* Set the geometry parameters for a LIODN */ +static int pamu_set_liodn(int liodn, struct device *dev, + struct fsl_dma_domain *dma_domain, + struct iommu_domain_geometry *geom_attr, + u32 win_cnt) +{ + phys_addr_t window_addr, window_size; + phys_addr_t subwin_size; + int ret = 0, i; + u32 omi_index = ~(u32)0; + unsigned long flags; + + /* + * Configure the omi_index at the geometry setup time. + * This is a static value which depends on the type of + * device and would not change thereafter. + */ + get_ome_index(&omi_index, dev); + + window_addr = geom_attr->aperture_start; + window_size = dma_domain->geom_size; + + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_disable_liodn(liodn); + if (!ret) + ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index, + 0, dma_domain->snoop_id, + dma_domain->stash_id, win_cnt, 0); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU PAACE configuration failed for liodn %d, win_cnt =%d\n", liodn, win_cnt); + return ret; + } + + if (win_cnt > 1) { + subwin_size = window_size >> ilog2(win_cnt); + for (i = 0; i < win_cnt; i++) { + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_disable_spaace(liodn, i); + if (!ret) + ret = pamu_config_spaace(liodn, win_cnt, i, + subwin_size, omi_index, + 0, dma_domain->snoop_id, + dma_domain->stash_id, + 0, 0); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU SPAACE configuration failed for liodn %d\n", liodn); + return ret; + } + } + } + + return ret; +} + +static int check_size(u64 size, dma_addr_t iova) +{ + /* + * Size must be a power of two and at least be equal + * to PAMU page size. + */ + if (!is_power_of_2(size) || size < PAMU_PAGE_SIZE) { + pr_debug("%s: size too small or not a power of two\n", __func__); + return -EINVAL; + } + + /* iova must be page size aligned*/ + if (iova & (size - 1)) { + pr_debug("%s: address is not aligned with window size\n", __func__); + return -EINVAL; + } + + return 0; +} + +static struct fsl_dma_domain *iommu_alloc_dma_domain(void) +{ + struct fsl_dma_domain *domain; + + domain = kmem_cache_zalloc(fsl_pamu_domain_cache, GFP_KERNEL); + if (!domain) + return NULL; + + domain->stash_id = ~(u32)0; + domain->snoop_id = ~(u32)0; + domain->win_cnt = pamu_get_max_subwin_cnt(); + domain->geom_size = 0; + + INIT_LIST_HEAD(&domain->devices); + + spin_lock_init(&domain->domain_lock); + + return domain; +} + +static inline struct device_domain_info *find_domain(struct device *dev) +{ + return dev->archdata.iommu_domain; +} + +static void remove_device_ref(struct device_domain_info *info, u32 win_cnt) +{ + unsigned long flags; + + list_del(&info->link); + spin_lock_irqsave(&iommu_lock, flags); + if (win_cnt > 1) + pamu_free_subwins(info->liodn); + pamu_disable_liodn(info->liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + spin_lock_irqsave(&device_domain_lock, flags); + info->dev->archdata.iommu_domain = NULL; + kmem_cache_free(iommu_devinfo_cache, info); + spin_unlock_irqrestore(&device_domain_lock, flags); +} + +static void detach_device(struct device *dev, struct fsl_dma_domain *dma_domain) +{ + struct device_domain_info *info, *tmp; + unsigned long flags; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + /* Remove the device from the domain device list */ + list_for_each_entry_safe(info, tmp, &dma_domain->devices, link) { + if (!dev || (info->dev == dev)) + remove_device_ref(info, dma_domain->win_cnt); + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); +} + +static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct device *dev) +{ + struct device_domain_info *info, *old_domain_info; + unsigned long flags; + + spin_lock_irqsave(&device_domain_lock, flags); + /* + * Check here if the device is already attached to domain or not. + * If the device is already attached to a domain detach it. + */ + old_domain_info = find_domain(dev); + if (old_domain_info && old_domain_info->domain != dma_domain) { + spin_unlock_irqrestore(&device_domain_lock, flags); + detach_device(dev, old_domain_info->domain); + spin_lock_irqsave(&device_domain_lock, flags); + } + + info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_ATOMIC); + + info->dev = dev; + info->liodn = liodn; + info->domain = dma_domain; + + list_add(&info->link, &dma_domain->devices); + /* + * In case of devices with multiple LIODNs just store + * the info for the first LIODN as all + * LIODNs share the same domain + */ + if (!old_domain_info) + dev->archdata.iommu_domain = info; + spin_unlock_irqrestore(&device_domain_lock, flags); + +} + +static phys_addr_t fsl_pamu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + if ((iova < domain->geometry.aperture_start) || + iova > (domain->geometry.aperture_end)) + return 0; + + return get_phys_addr(dma_domain, iova); +} + +static int fsl_pamu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return cap == IOMMU_CAP_CACHE_COHERENCY; +} + +static void fsl_pamu_domain_destroy(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + domain->priv = NULL; + + /* remove all the devices from the device list */ + detach_device(NULL, dma_domain); + + dma_domain->enabled = 0; + dma_domain->mapped = 0; + + kmem_cache_free(fsl_pamu_domain_cache, dma_domain); +} + +static int fsl_pamu_domain_init(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain; + + dma_domain = iommu_alloc_dma_domain(); + if (!dma_domain) { + pr_debug("dma_domain allocation failed\n"); + return -ENOMEM; + } + domain->priv = dma_domain; + dma_domain->iommu_domain = domain; + /* defaul geometry 64 GB i.e. maximum system address */ + domain->geometry.aperture_start = 0; + domain->geometry.aperture_end = (1ULL << 36) - 1; + domain->geometry.force_aperture = true; + + return 0; +} + +/* Configure geometry settings for all LIODNs associated with domain */ +static int pamu_set_domain_geometry(struct fsl_dma_domain *dma_domain, + struct iommu_domain_geometry *geom_attr, + u32 win_cnt) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = pamu_set_liodn(info->liodn, info->dev, dma_domain, + geom_attr, win_cnt); + if (ret) + break; + } + + return ret; +} + +/* Update stash destination for all LIODNs associated with the domain */ +static int update_domain_stash(struct fsl_dma_domain *dma_domain, u32 val) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = update_liodn_stash(info->liodn, dma_domain, val); + if (ret) + break; + } + + return ret; +} + +/* Update domain mappings for all LIODNs associated with the domain */ +static int update_domain_mapping(struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = update_liodn(info->liodn, dma_domain, wnd_nr); + if (ret) + break; + } + return ret; +} + +static int disable_domain_win(struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + if (dma_domain->win_cnt == 1 && dma_domain->enabled) { + ret = pamu_disable_liodn(info->liodn); + if (!ret) + dma_domain->enabled = 0; + } else { + ret = pamu_disable_spaace(info->liodn, wnd_nr); + } + } + + return ret; +} + +static void fsl_pamu_window_disable(struct iommu_domain *domain, u32 wnd_nr) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Number of windows not configured\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return; + } + + if (wnd_nr >= dma_domain->win_cnt) { + pr_debug("Invalid window index\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return; + } + + if (dma_domain->win_arr[wnd_nr].valid) { + ret = disable_domain_win(dma_domain, wnd_nr); + if (!ret) { + dma_domain->win_arr[wnd_nr].valid = 0; + dma_domain->mapped--; + } + } + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + +} + +static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr, + phys_addr_t paddr, u64 size, int prot) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + struct dma_window *wnd; + int pamu_prot = 0; + int ret; + unsigned long flags; + u64 win_size; + + if (prot & IOMMU_READ) + pamu_prot |= PAACE_AP_PERMS_QUERY; + if (prot & IOMMU_WRITE) + pamu_prot |= PAACE_AP_PERMS_UPDATE; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Number of windows not configured\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENODEV; + } + + if (wnd_nr >= dma_domain->win_cnt) { + pr_debug("Invalid window index\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt); + if (size > win_size) { + pr_debug("Invalid window size \n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + if (dma_domain->win_cnt == 1) { + if (dma_domain->enabled) { + pr_debug("Disable the window before updating the mapping\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + ret = check_size(size, domain->geometry.aperture_start); + if (ret) { + pr_debug("Aperture start not aligned to the size\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + } + + wnd = &dma_domain->win_arr[wnd_nr]; + if (!wnd->valid) { + wnd->paddr = paddr; + wnd->size = size; + wnd->prot = pamu_prot; + + ret = update_domain_mapping(dma_domain, wnd_nr); + if (!ret) { + wnd->valid = 1; + dma_domain->mapped++; + } + } else { + pr_debug("Disable the window before updating the mapping\n"); + ret = -EBUSY; + } + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +/* + * Attach the LIODN to the DMA domain and configure the geometry + * and window mappings. + */ +static int handle_attach_device(struct fsl_dma_domain *dma_domain, + struct device *dev, const u32 *liodn, + int num) +{ + unsigned long flags; + struct iommu_domain *domain = dma_domain->iommu_domain; + int ret = 0; + int i; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + for (i = 0; i < num; i++) { + + /* Ensure that LIODN value is valid */ + if (liodn[i] >= PAACE_NUMBER_ENTRIES) { + pr_debug("Invalid liodn %d, attach device failed for %s\n", + liodn[i], dev->of_node->full_name); + ret = -EINVAL; + break; + } + + attach_device(dma_domain, liodn[i], dev); + /* + * Check if geometry has already been configured + * for the domain. If yes, set the geometry for + * the LIODN. + */ + if (dma_domain->win_arr) { + u32 win_cnt = dma_domain->win_cnt > 1 ? dma_domain->win_cnt : 0; + ret = pamu_set_liodn(liodn[i], dev, dma_domain, + &domain->geometry, + win_cnt); + if (ret) + break; + if (dma_domain->mapped) { + /* + * Create window/subwindow mapping for + * the LIODN. + */ + ret = map_liodn(liodn[i], dma_domain); + if (ret) + break; + } + } + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +static int fsl_pamu_attach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + const u32 *liodn; + u32 liodn_cnt; + int len, ret = 0; + struct pci_dev *pdev = NULL; + struct pci_controller *pci_ctl; + + /* + * Use LIODN of the PCI controller while attaching a + * PCI device. + */ + if (dev->bus == &pci_bus_type) { + pdev = to_pci_dev(dev); + pci_ctl = pci_bus_to_host(pdev->bus); + /* + * make dev point to pci controller device + * so we can get the LIODN programmed by + * u-boot. + */ + dev = pci_ctl->parent; + } + + liodn = of_get_property(dev->of_node, "fsl,liodn", &len); + if (liodn) { + liodn_cnt = len / sizeof(u32); + ret = handle_attach_device(dma_domain, dev, + liodn, liodn_cnt); + } else { + pr_debug("missing fsl,liodn property at %s\n", + dev->of_node->full_name); + ret = -EINVAL; + } + + return ret; +} + +static void fsl_pamu_detach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + const u32 *prop; + int len; + struct pci_dev *pdev = NULL; + struct pci_controller *pci_ctl; + + /* + * Use LIODN of the PCI controller while detaching a + * PCI device. + */ + if (dev->bus == &pci_bus_type) { + pdev = to_pci_dev(dev); + pci_ctl = pci_bus_to_host(pdev->bus); + /* + * make dev point to pci controller device + * so we can get the LIODN programmed by + * u-boot. + */ + dev = pci_ctl->parent; + } + + prop = of_get_property(dev->of_node, "fsl,liodn", &len); + if (prop) + detach_device(dev, dma_domain); + else + pr_debug("missing fsl,liodn property at %s\n", + dev->of_node->full_name); +} + +static int configure_domain_geometry(struct iommu_domain *domain, void *data) +{ + struct iommu_domain_geometry *geom_attr = data; + struct fsl_dma_domain *dma_domain = domain->priv; + dma_addr_t geom_size; + unsigned long flags; + + geom_size = geom_attr->aperture_end - geom_attr->aperture_start + 1; + /* + * Sanity check the geometry size. Also, we do not support + * DMA outside of the geometry. + */ + if (check_size(geom_size, geom_attr->aperture_start) || + !geom_attr->force_aperture) { + pr_debug("Invalid PAMU geometry attributes\n"); + return -EINVAL; + } + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (dma_domain->enabled) { + pr_debug("Can't set geometry attributes as domain is active\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + /* Copy the domain geometry information */ + memcpy(&domain->geometry, geom_attr, + sizeof(struct iommu_domain_geometry)); + dma_domain->geom_size = geom_size; + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return 0; +} + +/* Set the domain stash attribute */ +static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void *data) +{ + struct pamu_stash_attribute *stash_attr = data; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + + memcpy(&dma_domain->dma_stash, stash_attr, + sizeof(struct pamu_stash_attribute)); + + dma_domain->stash_id = get_stash_id(stash_attr->cache, + stash_attr->cpu); + if (dma_domain->stash_id == ~(u32)0) { + pr_debug("Invalid stash attributes\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + ret = update_domain_stash(dma_domain, dma_domain->stash_id); + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +/* Configure domain dma state i.e. enable/disable DMA*/ +static int configure_domain_dma_state(struct fsl_dma_domain *dma_domain, bool enable) +{ + struct device_domain_info *info; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + + if (enable && !dma_domain->mapped) { + pr_debug("Can't enable DMA domain without valid mapping\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENODEV; + } + + dma_domain->enabled = enable; + list_for_each_entry(info, &dma_domain->devices, + link) { + ret = (enable) ? pamu_enable_liodn(info->liodn) : + pamu_disable_liodn(info->liodn); + if (ret) + pr_debug("Unable to set dma state for liodn %d", + info->liodn); + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return 0; +} + +static int fsl_pamu_set_domain_attr(struct iommu_domain *domain, + enum iommu_attr attr_type, void *data) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + int ret = 0; + + + switch (attr_type) { + case DOMAIN_ATTR_GEOMETRY: + ret = configure_domain_geometry(domain, data); + break; + case DOMAIN_ATTR_FSL_PAMU_STASH: + ret = configure_domain_stash(dma_domain, data); + break; + case DOMAIN_ATTR_FSL_PAMU_ENABLE: + ret = configure_domain_dma_state(dma_domain, *(int *)data); + break; + default: + pr_debug("Unsupported attribute type\n"); + ret = -EINVAL; + break; + }; + + return ret; +} + +static int fsl_pamu_get_domain_attr(struct iommu_domain *domain, + enum iommu_attr attr_type, void *data) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + int ret = 0; + + + switch (attr_type) { + case DOMAIN_ATTR_FSL_PAMU_STASH: + memcpy((struct pamu_stash_attribute *) data, &dma_domain->dma_stash, + sizeof(struct pamu_stash_attribute)); + break; + case DOMAIN_ATTR_FSL_PAMU_ENABLE: + *(int *)data = dma_domain->enabled; + break; + case DOMAIN_ATTR_FSL_PAMUV1: + *(int *)data = DOMAIN_ATTR_FSL_PAMUV1; + break; + default: + pr_debug("Unsupported attribute type\n"); + ret = -EINVAL; + break; + }; + + return ret; +} + +#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) + +static struct iommu_group *get_device_iommu_group(struct device *dev) +{ + struct iommu_group *group; + + group = iommu_group_get(dev); + if (!group) + group = iommu_group_alloc(); + + return group; +} + +static bool check_pci_ctl_endpt_part(struct pci_controller *pci_ctl) +{ + u32 version; + + /* Check the PCI controller version number by readding BRR1 register */ + version = in_be32(pci_ctl->cfg_addr + (PCI_FSL_BRR1 >> 2)); + version &= PCI_FSL_BRR1_VER; + /* If PCI controller version is >= 0x204 we can partition endpoints*/ + if (version >= 0x204) + return 1; + + return 0; +} + +/* Get iommu group information from peer devices or devices on the parent bus */ +static struct iommu_group *get_shared_pci_device_group(struct pci_dev *pdev) +{ + struct pci_dev *tmp; + struct iommu_group *group; + struct pci_bus *bus = pdev->bus; + + /* + * Traverese the pci bus device list to get + * the shared iommu group. + */ + while (bus) { + list_for_each_entry(tmp, &bus->devices, bus_list) { + if (tmp == pdev) + continue; + group = iommu_group_get(&tmp->dev); + if (group) + return group; + } + + bus = bus->parent; + } + + return NULL; +} + +static struct iommu_group *get_pci_device_group(struct pci_dev *pdev) +{ + struct pci_controller *pci_ctl; + bool pci_endpt_partioning; + struct iommu_group *group = NULL; + struct pci_dev *bridge, *dma_pdev = NULL; + + pci_ctl = pci_bus_to_host(pdev->bus); + pci_endpt_partioning = check_pci_ctl_endpt_part(pci_ctl); + /* We can partition PCIe devices so assign device group to the device */ + if (pci_endpt_partioning) { + bridge = pci_find_upstream_pcie_bridge(pdev); + if (bridge) { + if (pci_is_pcie(bridge)) + dma_pdev = pci_get_domain_bus_and_slot( + pci_domain_nr(pdev->bus), + bridge->subordinate->number, 0); + if (!dma_pdev) + dma_pdev = pci_dev_get(bridge); + } else + dma_pdev = pci_dev_get(pdev); + + /* Account for quirked devices */ + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); + + /* + * If it's a multifunction device that does not support our + * required ACS flags, add to the same group as lowest numbered + * function that also does not suport the required ACS flags. + */ + if (dma_pdev->multifunction && + !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) { + u8 i, slot = PCI_SLOT(dma_pdev->devfn); + + for (i = 0; i < 8; i++) { + struct pci_dev *tmp; + + tmp = pci_get_slot(dma_pdev->bus, PCI_DEVFN(slot, i)); + if (!tmp) + continue; + + if (!pci_acs_enabled(tmp, REQ_ACS_FLAGS)) { + swap_pci_ref(&dma_pdev, tmp); + break; + } + pci_dev_put(tmp); + } + } + + /* + * Devices on the root bus go through the iommu. If that's not us, + * find the next upstream device and test ACS up to the root bus. + * Finding the next device may require skipping virtual buses. + */ + while (!pci_is_root_bus(dma_pdev->bus)) { + struct pci_bus *bus = dma_pdev->bus; + + while (!bus->self) { + if (!pci_is_root_bus(bus)) + bus = bus->parent; + else + goto root_bus; + } + + if (pci_acs_path_enabled(bus->self, NULL, REQ_ACS_FLAGS)) + break; + + swap_pci_ref(&dma_pdev, pci_dev_get(bus->self)); + } + +root_bus: + group = get_device_iommu_group(&dma_pdev->dev); + pci_dev_put(dma_pdev); + /* + * PCIe controller is not a paritionable entity + * free the controller device iommu_group. + */ + if (pci_ctl->parent->iommu_group) + iommu_group_remove_device(pci_ctl->parent); + } else { + /* + * All devices connected to the controller will share the + * PCI controllers device group. If this is the first + * device to be probed for the pci controller, copy the + * device group information from the PCI controller device + * node and remove the PCI controller iommu group. + * For subsequent devices, the iommu group information can + * be obtained from sibling devices (i.e. from the bus_devices + * link list). + */ + if (pci_ctl->parent->iommu_group) { + group = get_device_iommu_group(pci_ctl->parent); + iommu_group_remove_device(pci_ctl->parent); + } else + group = get_shared_pci_device_group(pdev); + } + + return group; +} + +static int fsl_pamu_add_device(struct device *dev) +{ + struct iommu_group *group = NULL; + struct pci_dev *pdev; + const u32 *prop; + int ret, len; + + /* + * For platform devices we allocate a separate group for + * each of the devices. + */ + if (dev->bus == &pci_bus_type) { + pdev = to_pci_dev(dev); + /* Don't create device groups for virtual PCI bridges */ + if (pdev->subordinate) + return 0; + + group = get_pci_device_group(pdev); + + } else { + prop = of_get_property(dev->of_node, "fsl,liodn", &len); + if (prop) + group = get_device_iommu_group(dev); + } + + if (!group || IS_ERR(group)) + return PTR_ERR(group); + + ret = iommu_group_add_device(group, dev); + + iommu_group_put(group); + return ret; +} + +static void fsl_pamu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + +static int fsl_pamu_set_windows(struct iommu_domain *domain, u32 w_count) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + /* Ensure domain is inactive i.e. DMA should be disabled for the domain */ + if (dma_domain->enabled) { + pr_debug("Can't set geometry attributes as domain is active\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + /* Ensure that the geometry has been set for the domain */ + if (!dma_domain->geom_size) { + pr_debug("Please configure geometry before setting the number of windows\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + /* + * Ensure we have valid window count i.e. it should be less than + * maximum permissible limit and should be a power of two. + */ + if (w_count > pamu_get_max_subwin_cnt() || !is_power_of_2(w_count)) { + pr_debug("Invalid window count\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + ret = pamu_set_domain_geometry(dma_domain, &domain->geometry, + ((w_count > 1) ? w_count : 0)); + if (!ret) { + if (dma_domain->win_arr) + kfree(dma_domain->win_arr); + dma_domain->win_arr = kzalloc(sizeof(struct dma_window) * + w_count, GFP_ATOMIC); + if (!dma_domain->win_arr) { + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENOMEM; + } + dma_domain->win_cnt = w_count; + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +static u32 fsl_pamu_get_windows(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + return dma_domain->win_cnt; +} + +static struct iommu_ops fsl_pamu_ops = { + .domain_init = fsl_pamu_domain_init, + .domain_destroy = fsl_pamu_domain_destroy, + .attach_dev = fsl_pamu_attach_device, + .detach_dev = fsl_pamu_detach_device, + .domain_window_enable = fsl_pamu_window_enable, + .domain_window_disable = fsl_pamu_window_disable, + .domain_get_windows = fsl_pamu_get_windows, + .domain_set_windows = fsl_pamu_set_windows, + .iova_to_phys = fsl_pamu_iova_to_phys, + .domain_has_cap = fsl_pamu_domain_has_cap, + .domain_set_attr = fsl_pamu_set_domain_attr, + .domain_get_attr = fsl_pamu_get_domain_attr, + .add_device = fsl_pamu_add_device, + .remove_device = fsl_pamu_remove_device, +}; + +int pamu_domain_init() +{ + int ret = 0; + + ret = iommu_init_mempool(); + if (ret) + return ret; + + bus_set_iommu(&platform_bus_type, &fsl_pamu_ops); + bus_set_iommu(&pci_bus_type, &fsl_pamu_ops); + + return ret; +} diff --git a/drivers/iommu/fsl_pamu_domain.h b/drivers/iommu/fsl_pamu_domain.h new file mode 100644 index 0000000..c90293f --- /dev/null +++ b/drivers/iommu/fsl_pamu_domain.h @@ -0,0 +1,85 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#ifndef __FSL_PAMU_DOMAIN_H +#define __FSL_PAMU_DOMAIN_H + +#include "fsl_pamu.h" + +struct dma_window { + phys_addr_t paddr; + u64 size; + int valid; + int prot; +}; + +struct fsl_dma_domain { + /* + * Indicates the geometry size for the domain. + * This would be set when the geometry is + * configured for the domain. + */ + dma_addr_t geom_size; + /* + * Number of windows assocaited with this domain. + * During domain initialization, it is set to the + * the maximum number of subwindows allowed for a LIODN. + * Minimum value for this is 1 indicating a single PAMU + * window, without any sub windows. Value can be set/ + * queried by set_attr/get_attr API for DOMAIN_ATTR_WINDOWS. + * Value can only be set once the geometry has been configured. + */ + u32 win_cnt; + /* + * win_arr contains information of the configured + * windows for a domain. This is allocated only + * when the number of windows for the domain are + * set. + */ + struct dma_window *win_arr; + /* list of devices associated with the domain */ + struct list_head devices; + /* dma_domain states: + * mapped - A particular mapping has been created + * within the configured geometry. + * enabled - DMA has been enabled for the given + * domain. This translates to setting of the + * valid bit for the primary PAACE in the PAMU + * PAACT table. Domain geometry should be set and + * it must have a valid mapping before DMA can be + * enabled for it. + * + */ + int mapped; + int enabled; + /* stash_id obtained from the stash attribute details */ + u32 stash_id; + struct pamu_stash_attribute dma_stash; + u32 snoop_id; + struct iommu_domain *iommu_domain; + spinlock_t domain_lock; +}; + +/* domain-device relationship */ +struct device_domain_info { + struct list_head link; /* link to domain siblings */ + struct device *dev; + u32 liodn; + struct fsl_dma_domain *domain; /* pointer to domain */ +}; +#endif /* __FSL_PAMU_DOMAIN_H */ |