diff options
| -rw-r--r-- | drivers/iommu/fsl_pamu.c | 264 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu.h | 10 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu_domain.c | 275 | ||||
| -rw-r--r-- | drivers/iommu/fsl_pamu_domain.h | 16 | ||||
| -rw-r--r-- | drivers/soc/fsl/qbman/qman_portal.c | 7 | ||||
| -rw-r--r-- | include/linux/iommu.h | 1 |
6 files changed, 60 insertions, 513 deletions
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index b9a974d97831..3e1647cd5ad4 100644 --- a/drivers/iommu/fsl_pamu.c +++ b/drivers/iommu/fsl_pamu.c @@ -63,19 +63,6 @@ static const struct of_device_id l3_device_ids[] = { /* maximum subwindows permitted per liodn */ static u32 max_subwindow_count; -/* Pool for fspi allocation */ -static struct gen_pool *spaace_pool; - -/** - * pamu_get_max_subwin_cnt() - Return the maximum supported - * subwindow count per liodn. - * - */ -u32 pamu_get_max_subwin_cnt(void) -{ - return max_subwindow_count; -} - /** * pamu_get_ppaace() - Return the primary PACCE * @liodn: liodn PAACT index for desired PAACE @@ -155,13 +142,6 @@ static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size) return fls64(addrspace_size) - 2; } -/* 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 @@ -175,88 +155,10 @@ static void pamu_init_ppaace(struct paace *ppaace) } /* - * 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) +int pamu_update_paace_stash(int liodn, u32 value) { struct paace *paace; @@ -265,11 +167,6 @@ int pamu_update_paace_stash(int liodn, u32 subwin, u32 value) 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(); @@ -277,31 +174,6 @@ int pamu_update_paace_stash(int liodn, u32 subwin, u32 value) 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 * @@ -314,17 +186,15 @@ int pamu_disable_spaace(int liodn, u32 subwin) * 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) + int prot) { struct paace *ppaace; - unsigned long fspi; if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE) { pr_debug("window size too small or not a power of two %pa\n", @@ -368,116 +238,12 @@ int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size, 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 ((subwin_size & (subwin_size - 1)) || 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); - + 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; @@ -1129,17 +895,6 @@ static int fsl_pamu_probe(struct platform_device *pdev) 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(dev, "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; @@ -1167,9 +922,6 @@ static int fsl_pamu_probe(struct platform_device *pdev) return 0; -error_genpool: - gen_pool_destroy(spaace_pool); - error: if (irq != NO_IRQ) free_irq(irq, data); diff --git a/drivers/iommu/fsl_pamu.h b/drivers/iommu/fsl_pamu.h index e1496ba96160..04fd843d718d 100644 --- a/drivers/iommu/fsl_pamu.h +++ b/drivers/iommu/fsl_pamu.h @@ -383,18 +383,12 @@ struct ome { 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); + 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); +int pamu_update_paace_stash(int liodn, u32 value); #endif /* __FSL_PAMU_H */ diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c index a4da5597755d..e6bdd38fc184 100644 --- a/drivers/iommu/fsl_pamu_domain.c +++ b/drivers/iommu/fsl_pamu_domain.c @@ -56,65 +56,19 @@ static int __init iommu_init_mempool(void) 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) { - 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 = (geom->aperture_end + 1) >> 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("SPAACE configuration failed for liodn %d\n", - liodn); - return ret; - } - } - } - - return ret; -} - -static int map_win(int liodn, struct fsl_dma_domain *dma_domain) +/* Map the DMA window corresponding to the LIODN */ +static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain) { int ret; struct dma_window *wnd = &dma_domain->win_arr[0]; @@ -127,7 +81,7 @@ static int map_win(int liodn, struct fsl_dma_domain *dma_domain) ~(u32)0, wnd->paddr >> PAMU_PAGE_SHIFT, dma_domain->snoop_id, dma_domain->stash_id, - 0, wnd->prot); + wnd->prot); spin_unlock_irqrestore(&iommu_lock, flags); if (ret) pr_debug("PAACE configuration failed for liodn %d\n", liodn); @@ -135,50 +89,27 @@ static int map_win(int liodn, struct fsl_dma_domain *dma_domain) 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]; + phys_addr_t wnd_addr; 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; + 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); - } + ret = pamu_config_ppaace(liodn, wnd_addr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, dma_domain->stash_id, + wnd->prot); + if (ret) + pr_debug("Window reconfiguration failed for liodn %d\n", + liodn); spin_unlock_irqrestore(&iommu_lock, flags); @@ -192,21 +123,12 @@ static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, 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); + ret = pamu_update_paace_stash(liodn, val); + if (ret) { + pr_debug("Failed to update SPAACE %d field for liodn %d\n ", + i, 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; - } + return ret; } spin_unlock_irqrestore(&iommu_lock, flags); @@ -217,14 +139,12 @@ static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, /* 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) + struct iommu_domain_geometry *geom_attr) { phys_addr_t window_addr, window_size; - phys_addr_t subwin_size; - int ret = 0, i; u32 omi_index = ~(u32)0; unsigned long flags; + int ret; /* * Configure the omi_index at the geometry setup time. @@ -241,34 +161,14 @@ static int pamu_set_liodn(int liodn, struct device *dev, 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); + dma_domain->stash_id, 0); spin_unlock_irqrestore(&iommu_lock, flags); if (ret) { - pr_debug("PAACE configuration failed for liodn %d, win_cnt =%d\n", - liodn, win_cnt); + pr_debug("PAACE configuration failed for liodn %d\n", + liodn); 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("SPAACE configuration failed for liodn %d\n", - liodn); - return ret; - } - } - } - return ret; } @@ -292,14 +192,12 @@ static int check_size(u64 size, dma_addr_t iova) return 0; } -static void remove_device_ref(struct device_domain_info *info, u32 win_cnt) +static void remove_device_ref(struct device_domain_info *info) { 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); @@ -317,7 +215,7 @@ static void detach_device(struct device *dev, struct fsl_dma_domain *dma_domain) /* 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); + remove_device_ref(info); } spin_unlock_irqrestore(&dma_domain->domain_lock, flags); } @@ -399,7 +297,6 @@ static struct iommu_domain *fsl_pamu_domain_alloc(unsigned type) dma_domain->stash_id = ~(u32)0; dma_domain->snoop_id = ~(u32)0; - dma_domain->win_cnt = pamu_get_max_subwin_cnt(); INIT_LIST_HEAD(&dma_domain->devices); spin_lock_init(&dma_domain->domain_lock); @@ -411,24 +308,6 @@ static struct iommu_domain *fsl_pamu_domain_alloc(unsigned type) return &dma_domain->iommu_domain; } -/* 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) { @@ -475,39 +354,30 @@ static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr, 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) { + if (wnd_nr > 0) { pr_debug("Invalid window index\n"); spin_unlock_irqrestore(&dma_domain->domain_lock, flags); return -EINVAL; } - win_size = (domain->geometry.aperture_end + 1) >> - ilog2(dma_domain->win_cnt); + win_size = (domain->geometry.aperture_end + 1) >> ilog2(1); 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; - } + 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; - } + 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]; @@ -560,22 +430,18 @@ static int handle_attach_device(struct fsl_dma_domain *dma_domain, * 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); + ret = pamu_set_liodn(liodn[i], dev, dma_domain, + &domain->geometry); + if (ret) + break; + if (dma_domain->mapped) { + /* + * Create window/subwindow mapping for + * the LIODN. + */ + ret = map_liodn(liodn[i], dma_domain); 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); @@ -706,48 +572,6 @@ static int configure_domain_dma_state(struct fsl_dma_domain *dma_domain, bool en return 0; } -static int fsl_pamu_set_windows(struct iommu_domain *domain, u32 w_count) -{ - struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain); - 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 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) { - kfree(dma_domain->win_arr); - dma_domain->win_arr = kcalloc(w_count, - sizeof(*dma_domain->win_arr), - 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 int fsl_pamu_set_domain_attr(struct iommu_domain *domain, enum iommu_attr attr_type, void *data) { @@ -761,9 +585,6 @@ static int fsl_pamu_set_domain_attr(struct iommu_domain *domain, case DOMAIN_ATTR_FSL_PAMU_ENABLE: ret = configure_domain_dma_state(dma_domain, *(int *)data); break; - case DOMAIN_ATTR_WINDOWS: - ret = fsl_pamu_set_windows(domain, *(u32 *)data); - break; default: pr_debug("Unsupported attribute type\n"); ret = -EINVAL; diff --git a/drivers/iommu/fsl_pamu_domain.h b/drivers/iommu/fsl_pamu_domain.h index 53d359d66fe5..d3523ee9999d 100644 --- a/drivers/iommu/fsl_pamu_domain.h +++ b/drivers/iommu/fsl_pamu_domain.h @@ -18,22 +18,10 @@ struct dma_window { struct fsl_dma_domain { /* - * 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. + * windows for a domain. */ - struct dma_window *win_arr; + struct dma_window win_arr[1]; /* list of devices associated with the domain */ struct list_head devices; /* dma_domain states: diff --git a/drivers/soc/fsl/qbman/qman_portal.c b/drivers/soc/fsl/qbman/qman_portal.c index c958e6310d30..3d56ec4b373b 100644 --- a/drivers/soc/fsl/qbman/qman_portal.c +++ b/drivers/soc/fsl/qbman/qman_portal.c @@ -55,13 +55,6 @@ static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu) dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__); goto no_iommu; } - ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_WINDOWS, - &window_count); - if (ret < 0) { - dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, - ret); - goto out_domain_free; - } stash_attr.cpu = cpu; stash_attr.cache = PAMU_ATTR_CACHE_L1; ret = iommu_domain_set_attr(pcfg->iommu_domain, diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 95ce205347a9..761aa8b69936 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -109,7 +109,6 @@ enum iommu_cap { enum iommu_attr { DOMAIN_ATTR_GEOMETRY, DOMAIN_ATTR_PAGING, - DOMAIN_ATTR_WINDOWS, DOMAIN_ATTR_FSL_PAMU_STASH, DOMAIN_ATTR_FSL_PAMU_ENABLE, DOMAIN_ATTR_NESTING, /* two stages of translation */ |