diff options
Diffstat (limited to 'arch/ia64/sn/pci/tioce_provider.c')
| -rw-r--r-- | arch/ia64/sn/pci/tioce_provider.c | 1062 |
1 files changed, 0 insertions, 1062 deletions
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c deleted file mode 100644 index 3bd9abc35485..000000000000 --- a/arch/ia64/sn/pci/tioce_provider.c +++ /dev/null @@ -1,1062 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2003-2006 Silicon Graphics, Inc. All Rights Reserved. - */ - -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/slab.h> -#include <linux/pci.h> -#include <asm/sn/sn_sal.h> -#include <asm/sn/addrs.h> -#include <asm/sn/io.h> -#include <asm/sn/pcidev.h> -#include <asm/sn/pcibus_provider_defs.h> -#include <asm/sn/tioce_provider.h> - -/* - * 1/26/2006 - * - * WAR for SGI PV 944642. For revA TIOCE, need to use the following recipe - * (taken from the above PV) before and after accessing tioce internal MMR's - * to avoid tioce lockups. - * - * The recipe as taken from the PV: - * - * if(mmr address < 0x45000) { - * if(mmr address == 0 or 0x80) - * mmr wrt or read address 0xc0 - * else if(mmr address == 0x148 or 0x200) - * mmr wrt or read address 0x28 - * else - * mmr wrt or read address 0x158 - * - * do desired mmr access (rd or wrt) - * - * if(mmr address == 0x100) - * mmr wrt or read address 0x38 - * mmr wrt or read address 0xb050 - * } else - * do desired mmr access - * - * According to hw, we can use reads instead of writes to the above address - * - * Note this WAR can only to be used for accessing internal MMR's in the - * TIOCE Coretalk Address Range 0x0 - 0x07ff_ffff. This includes the - * "Local CE Registers and Memories" and "PCI Compatible Config Space" address - * spaces from table 2-1 of the "CE Programmer's Reference Overview" document. - * - * All registers defined in struct tioce will meet that criteria. - */ - -static inline void -tioce_mmr_war_pre(struct tioce_kernel *kern, void __iomem *mmr_addr) -{ - u64 mmr_base; - u64 mmr_offset; - - if (kern->ce_common->ce_rev != TIOCE_REV_A) - return; - - mmr_base = kern->ce_common->ce_pcibus.bs_base; - mmr_offset = (unsigned long)mmr_addr - mmr_base; - - if (mmr_offset < 0x45000) { - u64 mmr_war_offset; - - if (mmr_offset == 0 || mmr_offset == 0x80) - mmr_war_offset = 0xc0; - else if (mmr_offset == 0x148 || mmr_offset == 0x200) - mmr_war_offset = 0x28; - else - mmr_war_offset = 0x158; - - readq_relaxed((void __iomem *)(mmr_base + mmr_war_offset)); - } -} - -static inline void -tioce_mmr_war_post(struct tioce_kernel *kern, void __iomem *mmr_addr) -{ - u64 mmr_base; - u64 mmr_offset; - - if (kern->ce_common->ce_rev != TIOCE_REV_A) - return; - - mmr_base = kern->ce_common->ce_pcibus.bs_base; - mmr_offset = (unsigned long)mmr_addr - mmr_base; - - if (mmr_offset < 0x45000) { - if (mmr_offset == 0x100) - readq_relaxed((void __iomem *)(mmr_base + 0x38)); - readq_relaxed((void __iomem *)(mmr_base + 0xb050)); - } -} - -/* load mmr contents into a variable */ -#define tioce_mmr_load(kern, mmrp, varp) do {\ - tioce_mmr_war_pre(kern, mmrp); \ - *(varp) = readq_relaxed(mmrp); \ - tioce_mmr_war_post(kern, mmrp); \ -} while (0) - -/* store variable contents into mmr */ -#define tioce_mmr_store(kern, mmrp, varp) do {\ - tioce_mmr_war_pre(kern, mmrp); \ - writeq(*varp, mmrp); \ - tioce_mmr_war_post(kern, mmrp); \ -} while (0) - -/* store immediate value into mmr */ -#define tioce_mmr_storei(kern, mmrp, val) do {\ - tioce_mmr_war_pre(kern, mmrp); \ - writeq(val, mmrp); \ - tioce_mmr_war_post(kern, mmrp); \ -} while (0) - -/* set bits (immediate value) into mmr */ -#define tioce_mmr_seti(kern, mmrp, bits) do {\ - u64 tmp; \ - tioce_mmr_load(kern, mmrp, &tmp); \ - tmp |= (bits); \ - tioce_mmr_store(kern, mmrp, &tmp); \ -} while (0) - -/* clear bits (immediate value) into mmr */ -#define tioce_mmr_clri(kern, mmrp, bits) do { \ - u64 tmp; \ - tioce_mmr_load(kern, mmrp, &tmp); \ - tmp &= ~(bits); \ - tioce_mmr_store(kern, mmrp, &tmp); \ -} while (0) - -/** - * Bus address ranges for the 5 flavors of TIOCE DMA - */ - -#define TIOCE_D64_MIN 0x8000000000000000UL -#define TIOCE_D64_MAX 0xffffffffffffffffUL -#define TIOCE_D64_ADDR(a) ((a) >= TIOCE_D64_MIN) - -#define TIOCE_D32_MIN 0x0000000080000000UL -#define TIOCE_D32_MAX 0x00000000ffffffffUL -#define TIOCE_D32_ADDR(a) ((a) >= TIOCE_D32_MIN && (a) <= TIOCE_D32_MAX) - -#define TIOCE_M32_MIN 0x0000000000000000UL -#define TIOCE_M32_MAX 0x000000007fffffffUL -#define TIOCE_M32_ADDR(a) ((a) >= TIOCE_M32_MIN && (a) <= TIOCE_M32_MAX) - -#define TIOCE_M40_MIN 0x0000004000000000UL -#define TIOCE_M40_MAX 0x0000007fffffffffUL -#define TIOCE_M40_ADDR(a) ((a) >= TIOCE_M40_MIN && (a) <= TIOCE_M40_MAX) - -#define TIOCE_M40S_MIN 0x0000008000000000UL -#define TIOCE_M40S_MAX 0x000000ffffffffffUL -#define TIOCE_M40S_ADDR(a) ((a) >= TIOCE_M40S_MIN && (a) <= TIOCE_M40S_MAX) - -/* - * ATE manipulation macros. - */ - -#define ATE_PAGESHIFT(ps) (__ffs(ps)) -#define ATE_PAGEMASK(ps) ((ps)-1) - -#define ATE_PAGE(x, ps) ((x) >> ATE_PAGESHIFT(ps)) -#define ATE_NPAGES(start, len, pagesize) \ - (ATE_PAGE((start)+(len)-1, pagesize) - ATE_PAGE(start, pagesize) + 1) - -#define ATE_VALID(ate) ((ate) & (1UL << 63)) -#define ATE_MAKE(addr, ps, msi) \ - (((addr) & ~ATE_PAGEMASK(ps)) | (1UL << 63) | ((msi)?(1UL << 62):0)) - -/* - * Flavors of ate-based mapping supported by tioce_alloc_map() - */ - -#define TIOCE_ATE_M32 1 -#define TIOCE_ATE_M40 2 -#define TIOCE_ATE_M40S 3 - -#define KB(x) ((u64)(x) << 10) -#define MB(x) ((u64)(x) << 20) -#define GB(x) ((u64)(x) << 30) - -/** - * tioce_dma_d64 - create a DMA mapping using 64-bit direct mode - * @ct_addr: system coretalk address - * - * Map @ct_addr into 64-bit CE bus space. No device context is necessary - * and no CE mapping are consumed. - * - * Bits 53:0 come from the coretalk address. The remaining bits are set as - * follows: - * - * 63 - must be 1 to indicate d64 mode to CE hardware - * 62 - barrier bit ... controlled with tioce_dma_barrier() - * 61 - msi bit ... specified through dma_flags - * 60:54 - reserved, MBZ - */ -static u64 -tioce_dma_d64(unsigned long ct_addr, int dma_flags) -{ - u64 bus_addr; - - bus_addr = ct_addr | (1UL << 63); - if (dma_flags & SN_DMA_MSI) - bus_addr |= (1UL << 61); - - return bus_addr; -} - -/** - * pcidev_to_tioce - return misc ce related pointers given a pci_dev - * @pci_dev: pci device context - * @base: ptr to store struct tioce_mmr * for the CE holding this device - * @kernel: ptr to store struct tioce_kernel * for the CE holding this device - * @port: ptr to store the CE port number that this device is on - * - * Return pointers to various CE-related structures for the CE upstream of - * @pci_dev. - */ -static inline void -pcidev_to_tioce(struct pci_dev *pdev, struct tioce __iomem **base, - struct tioce_kernel **kernel, int *port) -{ - struct pcidev_info *pcidev_info; - struct tioce_common *ce_common; - struct tioce_kernel *ce_kernel; - - pcidev_info = SN_PCIDEV_INFO(pdev); - ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info; - ce_kernel = (struct tioce_kernel *)ce_common->ce_kernel_private; - - if (base) - *base = (struct tioce __iomem *)ce_common->ce_pcibus.bs_base; - if (kernel) - *kernel = ce_kernel; - - /* - * we use port as a zero-based value internally, even though the - * documentation is 1-based. - */ - if (port) - *port = - (pdev->bus->number < ce_kernel->ce_port1_secondary) ? 0 : 1; -} - -/** - * tioce_alloc_map - Given a coretalk address, map it to pcie bus address - * space using one of the various ATE-based address modes. - * @ce_kern: tioce context - * @type: map mode to use - * @port: 0-based port that the requesting device is downstream of - * @ct_addr: the coretalk address to map - * @len: number of bytes to map - * - * Given the addressing type, set up various parameters that define the - * ATE pool to use. Search for a contiguous block of entries to cover the - * length, and if enough resources exist, fill in the ATEs and construct a - * tioce_dmamap struct to track the mapping. - */ -static u64 -tioce_alloc_map(struct tioce_kernel *ce_kern, int type, int port, - u64 ct_addr, int len, int dma_flags) -{ - int i; - int j; - int first; - int last; - int entries; - int nates; - u64 pagesize; - int msi_capable, msi_wanted; - u64 *ate_shadow; - u64 __iomem *ate_reg; - u64 addr; - struct tioce __iomem *ce_mmr; - u64 bus_base; - struct tioce_dmamap *map; - - ce_mmr = (struct tioce __iomem *)ce_kern->ce_common->ce_pcibus.bs_base; - - switch (type) { - case TIOCE_ATE_M32: - /* - * The first 64 entries of the ate3240 pool are dedicated to - * super-page (TIOCE_ATE_M40S) mode. - */ - first = 64; - entries = TIOCE_NUM_M3240_ATES - 64; - ate_shadow = ce_kern->ce_ate3240_shadow; - ate_reg = ce_mmr->ce_ure_ate3240; - pagesize = ce_kern->ce_ate3240_pagesize; - bus_base = TIOCE_M32_MIN; - msi_capable = 1; - break; - case TIOCE_ATE_M40: - first = 0; - entries = TIOCE_NUM_M40_ATES; - ate_shadow = ce_kern->ce_ate40_shadow; - ate_reg = ce_mmr->ce_ure_ate40; - pagesize = MB(64); - bus_base = TIOCE_M40_MIN; - msi_capable = 0; - break; - case TIOCE_ATE_M40S: - /* - * ate3240 entries 0-31 are dedicated to port1 super-page - * mappings. ate3240 entries 32-63 are dedicated to port2. - */ - first = port * 32; - entries = 32; - ate_shadow = ce_kern->ce_ate3240_shadow; - ate_reg = ce_mmr->ce_ure_ate3240; - pagesize = GB(16); - bus_base = TIOCE_M40S_MIN; - msi_capable = 0; - break; - default: - return 0; - } - - msi_wanted = dma_flags & SN_DMA_MSI; - if (msi_wanted && !msi_capable) - return 0; - - nates = ATE_NPAGES(ct_addr, len, pagesize); - if (nates > entries) - return 0; - - last = first + entries - nates; - for (i = first; i <= last; i++) { - if (ATE_VALID(ate_shadow[i])) - continue; - - for (j = i; j < i + nates; j++) - if (ATE_VALID(ate_shadow[j])) - break; - - if (j >= i + nates) - break; - } - - if (i > last) - return 0; - - map = kzalloc(sizeof(struct tioce_dmamap), GFP_ATOMIC); - if (!map) - return 0; - - addr = ct_addr; - for (j = 0; j < nates; j++) { - u64 ate; - - ate = ATE_MAKE(addr, pagesize, msi_wanted); - ate_shadow[i + j] = ate; - tioce_mmr_storei(ce_kern, &ate_reg[i + j], ate); - addr += pagesize; - } - - map->refcnt = 1; - map->nbytes = nates * pagesize; - map->ct_start = ct_addr & ~ATE_PAGEMASK(pagesize); - map->pci_start = bus_base + (i * pagesize); - map->ate_hw = &ate_reg[i]; - map->ate_shadow = &ate_shadow[i]; - map->ate_count = nates; - - list_add(&map->ce_dmamap_list, &ce_kern->ce_dmamap_list); - - return (map->pci_start + (ct_addr - map->ct_start)); -} - -/** - * tioce_dma_d32 - create a DMA mapping using 32-bit direct mode - * @pdev: linux pci_dev representing the function - * @paddr: system physical address - * - * Map @paddr into 32-bit bus space of the CE associated with @pcidev_info. - */ -static u64 -tioce_dma_d32(struct pci_dev *pdev, u64 ct_addr, int dma_flags) -{ - int dma_ok; - int port; - struct tioce __iomem *ce_mmr; - struct tioce_kernel *ce_kern; - u64 ct_upper; - u64 ct_lower; - dma_addr_t bus_addr; - - if (dma_flags & SN_DMA_MSI) - return 0; - - ct_upper = ct_addr & ~0x3fffffffUL; - ct_lower = ct_addr & 0x3fffffffUL; - - pcidev_to_tioce(pdev, &ce_mmr, &ce_kern, &port); - - if (ce_kern->ce_port[port].dirmap_refcnt == 0) { - u64 tmp; - - ce_kern->ce_port[port].dirmap_shadow = ct_upper; - tioce_mmr_storei(ce_kern, &ce_mmr->ce_ure_dir_map[port], - ct_upper); - tmp = ce_mmr->ce_ure_dir_map[port]; - dma_ok = 1; - } else - dma_ok = (ce_kern->ce_port[port].dirmap_shadow == ct_upper); - - if (dma_ok) { - ce_kern->ce_port[port].dirmap_refcnt++; - bus_addr = TIOCE_D32_MIN + ct_lower; - } else - bus_addr = 0; - - return bus_addr; -} - -/** - * tioce_dma_barrier - swizzle a TIOCE bus address to include or exclude - * the barrier bit. - * @bus_addr: bus address to swizzle - * - * Given a TIOCE bus address, set the appropriate bit to indicate barrier - * attributes. - */ -static u64 -tioce_dma_barrier(u64 bus_addr, int on) -{ - u64 barrier_bit; - - /* barrier not supported in M40/M40S mode */ - if (TIOCE_M40_ADDR(bus_addr) || TIOCE_M40S_ADDR(bus_addr)) - return bus_addr; - - if (TIOCE_D64_ADDR(bus_addr)) - barrier_bit = (1UL << 62); - else /* must be m32 or d32 */ - barrier_bit = (1UL << 30); - - return (on) ? (bus_addr | barrier_bit) : (bus_addr & ~barrier_bit); -} - -/** - * tioce_dma_unmap - release CE mapping resources - * @pdev: linux pci_dev representing the function - * @bus_addr: bus address returned by an earlier tioce_dma_map - * @dir: mapping direction (unused) - * - * Locate mapping resources associated with @bus_addr and release them. - * For mappings created using the direct modes there are no resources - * to release. - */ -void -tioce_dma_unmap(struct pci_dev *pdev, dma_addr_t bus_addr, int dir) -{ - int i; - int port; - struct tioce_kernel *ce_kern; - struct tioce __iomem *ce_mmr; - unsigned long flags; - - bus_addr = tioce_dma_barrier(bus_addr, 0); - pcidev_to_tioce(pdev, &ce_mmr, &ce_kern, &port); - - /* nothing to do for D64 */ - - if (TIOCE_D64_ADDR(bus_addr)) - return; - - spin_lock_irqsave(&ce_kern->ce_lock, flags); - - if (TIOCE_D32_ADDR(bus_addr)) { - if (--ce_kern->ce_port[port].dirmap_refcnt == 0) { - ce_kern->ce_port[port].dirmap_shadow = 0; - tioce_mmr_storei(ce_kern, &ce_mmr->ce_ure_dir_map[port], - 0); - } - } else { - struct tioce_dmamap *map; - - list_for_each_entry(map, &ce_kern->ce_dmamap_list, - ce_dmamap_list) { - u64 last; - - last = map->pci_start + map->nbytes - 1; - if (bus_addr >= map->pci_start && bus_addr <= last) - break; - } - - if (&map->ce_dmamap_list == &ce_kern->ce_dmamap_list) { - printk(KERN_WARNING - "%s: %s - no map found for bus_addr 0x%llx\n", - __func__, pci_name(pdev), bus_addr); - } else if (--map->refcnt == 0) { - for (i = 0; i < map->ate_count; i++) { - map->ate_shadow[i] = 0; - tioce_mmr_storei(ce_kern, &map->ate_hw[i], 0); - } - - list_del(&map->ce_dmamap_list); - kfree(map); - } - } - - spin_unlock_irqrestore(&ce_kern->ce_lock, flags); -} - -/** - * tioce_do_dma_map - map pages for PCI DMA - * @pdev: linux pci_dev representing the function - * @paddr: host physical address to map - * @byte_count: bytes to map - * - * This is the main wrapper for mapping host physical pages to CE PCI space. - * The mapping mode used is based on the device's dma_mask. - */ -static u64 -tioce_do_dma_map(struct pci_dev *pdev, u64 paddr, size_t byte_count, - int barrier, int dma_flags) -{ - unsigned long flags; - u64 ct_addr; - u64 mapaddr = 0; - struct tioce_kernel *ce_kern; - struct tioce_dmamap *map; - int port; - u64 dma_mask; - - dma_mask = (barrier) ? pdev->dev.coherent_dma_mask : pdev->dma_mask; - - /* cards must be able to address at least 31 bits */ - if (dma_mask < 0x7fffffffUL) - return 0; - - if (SN_DMA_ADDRTYPE(dma_flags) == SN_DMA_ADDR_PHYS) - ct_addr = PHYS_TO_TIODMA(paddr); - else - ct_addr = paddr; - - /* - * If the device can generate 64 bit addresses, create a D64 map. - */ - if (dma_mask == ~0UL) { - mapaddr = tioce_dma_d64(ct_addr, dma_flags); - if (mapaddr) - goto dma_map_done; - } - - pcidev_to_tioce(pdev, NULL, &ce_kern, &port); - - spin_lock_irqsave(&ce_kern->ce_lock, flags); - - /* - * D64 didn't work ... See if we have an existing map that covers - * this address range. Must account for devices dma_mask here since - * an existing map might have been done in a mode using more pci - * address bits than this device can support. - */ - list_for_each_entry(map, &ce_kern->ce_dmamap_list, ce_dmamap_list) { - u64 last; - - last = map->ct_start + map->nbytes - 1; - if (ct_addr >= map->ct_start && - ct_addr + byte_count - 1 <= last && - map->pci_start <= dma_mask) { - map->refcnt++; - mapaddr = map->pci_start + (ct_addr - map->ct_start); - break; - } - } - - /* - * If we don't have a map yet, and the card can generate 40 - * bit addresses, try the M40/M40S modes. Note these modes do not - * support a barrier bit, so if we need a consistent map these - * won't work. - */ - if (!mapaddr && !barrier && dma_mask >= 0xffffffffffUL) { - /* - * We have two options for 40-bit mappings: 16GB "super" ATEs - * and 64MB "regular" ATEs. We'll try both if needed for a - * given mapping but which one we try first depends on the - * size. For requests >64MB, prefer to use a super page with - * regular as the fallback. Otherwise, try in the reverse order. - */ - - if (byte_count > MB(64)) { - mapaddr = tioce_alloc_map(ce_kern, TIOCE_ATE_M40S, - port, ct_addr, byte_count, - dma_flags); - if (!mapaddr) - mapaddr = - tioce_alloc_map(ce_kern, TIOCE_ATE_M40, -1, - ct_addr, byte_count, - dma_flags); - } else { - mapaddr = tioce_alloc_map(ce_kern, TIOCE_ATE_M40, -1, - ct_addr, byte_count, - dma_flags); - if (!mapaddr) - mapaddr = - tioce_alloc_map(ce_kern, TIOCE_ATE_M40S, - port, ct_addr, byte_count, - dma_flags); - } - } - - /* - * 32-bit direct is the next mode to try - */ - if (!mapaddr && dma_mask >= 0xffffffffUL) - mapaddr = tioce_dma_d32(pdev, ct_addr, dma_flags); - - /* - * Last resort, try 32-bit ATE-based map. - */ - if (!mapaddr) - mapaddr = - tioce_alloc_map(ce_kern, TIOCE_ATE_M32, -1, ct_addr, - byte_count, dma_flags); - - spin_unlock_irqrestore(&ce_kern->ce_lock, flags); - -dma_map_done: - if (mapaddr && barrier) - mapaddr = tioce_dma_barrier(mapaddr, 1); - - return mapaddr; -} - -/** - * tioce_dma - standard pci dma map interface - * @pdev: pci device requesting the map - * @paddr: system physical address to map into pci space - * @byte_count: # bytes to map - * - * Simply call tioce_do_dma_map() to create a map with the barrier bit clear - * in the address. - */ -static u64 -tioce_dma(struct pci_dev *pdev, unsigned long paddr, size_t byte_count, int dma_flags) -{ - return tioce_do_dma_map(pdev, paddr, byte_count, 0, dma_flags); -} - -/** - * tioce_dma_consistent - consistent pci dma map interface - * @pdev: pci device requesting the map - * @paddr: system physical address to map into pci space - * @byte_count: # bytes to map - * - * Simply call tioce_do_dma_map() to create a map with the barrier bit set - * in the address. - */ -static u64 -tioce_dma_consistent(struct pci_dev *pdev, unsigned long paddr, size_t byte_count, int dma_flags) -{ - return tioce_do_dma_map(pdev, paddr, byte_count, 1, dma_flags); -} - -/** - * tioce_error_intr_handler - SGI TIO CE error interrupt handler - * @irq: unused - * @arg: pointer to tioce_common struct for the given CE - * - * Handle a CE error interrupt. Simply a wrapper around a SAL call which - * defers processing to the SGI prom. - */ -static irqreturn_t -tioce_error_intr_handler(int irq, void *arg) -{ - struct tioce_common *soft = arg; - struct ia64_sal_retval ret_stuff; - ret_stuff.status = 0; - ret_stuff.v0 = 0; - - SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_ERROR_INTERRUPT, - soft->ce_pcibus.bs_persist_segment, - soft->ce_pcibus.bs_persist_busnum, 0, 0, 0, 0, 0); - - if (ret_stuff.v0) - panic("tioce_error_intr_handler: Fatal TIOCE error"); - - return IRQ_HANDLED; -} - -/** - * tioce_reserve_m32 - reserve M32 ATEs for the indicated address range - * @tioce_kernel: TIOCE context to reserve ATEs for - * @base: starting bus address to reserve - * @limit: last bus address to reserve - * - * If base/limit falls within the range of bus space mapped through the - * M32 space, reserve the resources corresponding to the range. - */ -static void -tioce_reserve_m32(struct tioce_kernel *ce_kern, u64 base, u64 limit) -{ - int ate_index, last_ate, ps; - struct tioce __iomem *ce_mmr; - - ce_mmr = (struct tioce __iomem *)ce_kern->ce_common->ce_pcibus.bs_base; - ps = ce_kern->ce_ate3240_pagesize; - ate_index = ATE_PAGE(base, ps); - last_ate = ate_index + ATE_NPAGES(base, limit-base+1, ps) - 1; - - if (ate_index < 64) - ate_index = 64; - - if (last_ate >= TIOCE_NUM_M3240_ATES) - last_ate = TIOCE_NUM_M3240_ATES - 1; - - while (ate_index <= last_ate) { - u64 ate; - - ate = ATE_MAKE(0xdeadbeef, ps, 0); - ce_kern->ce_ate3240_shadow[ate_index] = ate; - tioce_mmr_storei(ce_kern, &ce_mmr->ce_ure_ate3240[ate_index], - ate); - ate_index++; - } -} - -/** - * tioce_kern_init - init kernel structures related to a given TIOCE - * @tioce_common: ptr to a cached tioce_common struct that originated in prom - */ -static struct tioce_kernel * -tioce_kern_init(struct tioce_common *tioce_common) -{ - int i; - int ps; - int dev; - u32 tmp; - unsigned int seg, bus; - struct tioce __iomem *tioce_mmr; - struct tioce_kernel *tioce_kern; - - tioce_kern = kzalloc(sizeof(struct tioce_kernel), GFP_KERNEL); - if (!tioce_kern) { - return NULL; - } - - tioce_kern->ce_common = tioce_common; - spin_lock_init(&tioce_kern->ce_lock); - INIT_LIST_HEAD(&tioce_kern->ce_dmamap_list); - tioce_common->ce_kernel_private = (u64) tioce_kern; - - /* - * Determine the secondary bus number of the port2 logical PPB. - * This is used to decide whether a given pci device resides on - * port1 or port2. Note: We don't have enough plumbing set up - * here to use pci_read_config_xxx() so use raw_pci_read(). - */ - - seg = tioce_common->ce_pcibus.bs_persist_segment; - bus = tioce_common->ce_pcibus.bs_persist_busnum; - - raw_pci_read(seg, bus, PCI_DEVFN(2, 0), PCI_SECONDARY_BUS, 1,&tmp); - tioce_kern->ce_port1_secondary = (u8) tmp; - - /* - * Set PMU pagesize to the largest size available, and zero out - * the ATEs. - */ - - tioce_mmr = (struct tioce __iomem *)tioce_common->ce_pcibus.bs_base; - tioce_mmr_clri(tioce_kern, &tioce_mmr->ce_ure_page_map, - CE_URE_PAGESIZE_MASK); - tioce_mmr_seti(tioce_kern, &tioce_mmr->ce_ure_page_map, - CE_URE_256K_PAGESIZE); - ps = tioce_kern->ce_ate3240_pagesize = KB(256); - - for (i = 0; i < TIOCE_NUM_M40_ATES; i++) { - tioce_kern->ce_ate40_shadow[i] = 0; - tioce_mmr_storei(tioce_kern, &tioce_mmr->ce_ure_ate40[i], 0); - } - - for (i = 0; i < TIOCE_NUM_M3240_ATES; i++) { - tioce_kern->ce_ate3240_shadow[i] = 0; - tioce_mmr_storei(tioce_kern, &tioce_mmr->ce_ure_ate3240[i], 0); - } - - /* - * Reserve ATEs corresponding to reserved address ranges. These - * include: - * - * Memory space covered by each PPB mem base/limit register - * Memory space covered by each PPB prefetch base/limit register - * - * These bus ranges are for pio (downstream) traffic only, and so - * cannot be used for DMA. - */ - - for (dev = 1; dev <= 2; dev++) { - u64 base, limit; - - /* mem base/limit */ - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_MEMORY_BASE, 2, &tmp); - base = (u64)tmp << 16; - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_MEMORY_LIMIT, 2, &tmp); - limit = (u64)tmp << 16; - limit |= 0xfffffUL; - - if (base < limit) - tioce_reserve_m32(tioce_kern, base, limit); - - /* - * prefetch mem base/limit. The tioce ppb's have 64-bit - * decoders, so read the upper portions w/o checking the - * attributes. - */ - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_PREF_MEMORY_BASE, 2, &tmp); - base = ((u64)tmp & PCI_PREF_RANGE_MASK) << 16; - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_PREF_BASE_UPPER32, 4, &tmp); - base |= (u64)tmp << 32; - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_PREF_MEMORY_LIMIT, 2, &tmp); - - limit = ((u64)tmp & PCI_PREF_RANGE_MASK) << 16; - limit |= 0xfffffUL; - - raw_pci_read(seg, bus, PCI_DEVFN(dev, 0), - PCI_PREF_LIMIT_UPPER32, 4, &tmp); - limit |= (u64)tmp << 32; - - if ((base < limit) && TIOCE_M32_ADDR(base)) - tioce_reserve_m32(tioce_kern, base, limit); - } - - return tioce_kern; -} - -/** - * tioce_force_interrupt - implement altix force_interrupt() backend for CE - * @sn_irq_info: sn asic irq that we need an interrupt generated for - * - * Given an sn_irq_info struct, set the proper bit in ce_adm_force_int to - * force a secondary interrupt to be generated. This is to work around an - * asic issue where there is a small window of opportunity for a legacy device - * interrupt to be lost. - */ -static void -tioce_force_interrupt(struct sn_irq_info *sn_irq_info) -{ - struct pcidev_info *pcidev_info; - struct tioce_common *ce_common; - struct tioce_kernel *ce_kern; - struct tioce __iomem *ce_mmr; - u64 force_int_val; - - if (!sn_irq_info->irq_bridge) - return; - - if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_TIOCE) - return; - - pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; - if (!pcidev_info) - return; - - ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info; - ce_mmr = (struct tioce __iomem *)ce_common->ce_pcibus.bs_base; - ce_kern = (struct tioce_kernel *)ce_common->ce_kernel_private; - - /* - * TIOCE Rev A workaround (PV 945826), force an interrupt by writing - * the TIO_INTx register directly (1/26/2006) - */ - if (ce_common->ce_rev == TIOCE_REV_A) { - u64 int_bit_mask = (1ULL << sn_irq_info->irq_int_bit); - u64 status; - - tioce_mmr_load(ce_kern, &ce_mmr->ce_adm_int_status, &status); - if (status & int_bit_mask) { - u64 force_irq = (1 << 8) | sn_irq_info->irq_irq; - u64 ctalk = sn_irq_info->irq_xtalkaddr; - u64 nasid, offset; - - nasid = (ctalk & CTALK_NASID_MASK) >> CTALK_NASID_SHFT; - offset = (ctalk & CTALK_NODE_OFFSET); - HUB_S(TIO_IOSPACE_ADDR(nasid, offset), force_irq); - } - - return; - } - - /* - * irq_int_bit is originally set up by prom, and holds the interrupt - * bit shift (not mask) as defined by the bit definitions in the - * ce_adm_int mmr. These shifts are not the same for the - * ce_adm_force_int register, so do an explicit mapping here to make - * things clearer. - */ - - switch (sn_irq_info->irq_int_bit) { - case CE_ADM_INT_PCIE_PORT1_DEV_A_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_A_SHFT; - break; - case CE_ADM_INT_PCIE_PORT1_DEV_B_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_B_SHFT; - break; - case CE_ADM_INT_PCIE_PORT1_DEV_C_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_C_SHFT; - break; - case CE_ADM_INT_PCIE_PORT1_DEV_D_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_D_SHFT; - break; - case CE_ADM_INT_PCIE_PORT2_DEV_A_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_A_SHFT; - break; - case CE_ADM_INT_PCIE_PORT2_DEV_B_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_B_SHFT; - break; - case CE_ADM_INT_PCIE_PORT2_DEV_C_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_C_SHFT; - break; - case CE_ADM_INT_PCIE_PORT2_DEV_D_SHFT: - force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_D_SHFT; - break; - default: - return; - } - tioce_mmr_storei(ce_kern, &ce_mmr->ce_adm_force_int, force_int_val); -} - -/** - * tioce_target_interrupt - implement set_irq_affinity for tioce resident - * functions. Note: only applies to line interrupts, not MSI's. - * - * @sn_irq_info: SN IRQ context - * - * Given an sn_irq_info, set the associated CE device's interrupt destination - * register. Since the interrupt destination registers are on a per-ce-slot - * basis, this will retarget line interrupts for all functions downstream of - * the slot. - */ -static void -tioce_target_interrupt(struct sn_irq_info *sn_irq_info) -{ - struct pcidev_info *pcidev_info; - struct tioce_common *ce_common; - struct tioce_kernel *ce_kern; - struct tioce __iomem *ce_mmr; - int bit; - u64 vector; - - pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; - if (!pcidev_info) - return; - - ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info; - ce_mmr = (struct tioce __iomem *)ce_common->ce_pcibus.bs_base; - ce_kern = (struct tioce_kernel *)ce_common->ce_kernel_private; - - bit = sn_irq_info->irq_int_bit; - - tioce_mmr_seti(ce_kern, &ce_mmr->ce_adm_int_mask, (1UL << bit)); - vector = (u64)sn_irq_info->irq_irq << INTR_VECTOR_SHFT; - vector |= sn_irq_info->irq_xtalkaddr; - tioce_mmr_storei(ce_kern, &ce_mmr->ce_adm_int_dest[bit], vector); - tioce_mmr_clri(ce_kern, &ce_mmr->ce_adm_int_mask, (1UL << bit)); - - tioce_force_interrupt(sn_irq_info); -} - -/** - * tioce_bus_fixup - perform final PCI fixup for a TIO CE bus - * @prom_bussoft: Common prom/kernel struct representing the bus - * - * Replicates the tioce_common pointed to by @prom_bussoft in kernel - * space. Allocates and initializes a kernel-only area for a given CE, - * and sets up an irq for handling CE error interrupts. - * - * On successful setup, returns the kernel version of tioce_common back to - * the caller. - */ -static void * -tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller) -{ - struct tioce_common *tioce_common; - struct tioce_kernel *tioce_kern; - struct tioce __iomem *tioce_mmr; - - /* - * Allocate kernel bus soft and copy from prom. - */ - - tioce_common = kzalloc(sizeof(struct tioce_common), GFP_KERNEL); - if (!tioce_common) - return NULL; - - memcpy(tioce_common, prom_bussoft, sizeof(struct tioce_common)); - tioce_common->ce_pcibus.bs_base = (unsigned long) - ioremap(REGION_OFFSET(tioce_common->ce_pcibus.bs_base), - sizeof(struct tioce_common)); - - tioce_kern = tioce_kern_init(tioce_common); - if (tioce_kern == NULL) { - kfree(tioce_common); - return NULL; - } - - /* - * Clear out any transient errors before registering the error - * interrupt handler. - */ - - tioce_mmr = (struct tioce __iomem *)tioce_common->ce_pcibus.bs_base; - tioce_mmr_seti(tioce_kern, &tioce_mmr->ce_adm_int_status_alias, ~0ULL); - tioce_mmr_seti(tioce_kern, &tioce_mmr->ce_adm_error_summary_alias, - ~0ULL); - tioce_mmr_seti(tioce_kern, &tioce_mmr->ce_dre_comp_err_addr, 0ULL); - - if (request_irq(SGI_PCIASIC_ERROR, - tioce_error_intr_handler, - IRQF_SHARED, "TIOCE error", (void *)tioce_common)) - printk(KERN_WARNING - "%s: Unable to get irq %d. " - "Error interrupts won't be routed for " - "TIOCE bus %04x:%02x\n", - __func__, SGI_PCIASIC_ERROR, - tioce_common->ce_pcibus.bs_persist_segment, - tioce_common->ce_pcibus.bs_persist_busnum); - - irq_set_handler(SGI_PCIASIC_ERROR, handle_level_irq); - sn_set_err_irq_affinity(SGI_PCIASIC_ERROR); - return tioce_common; -} - -static struct sn_pcibus_provider tioce_pci_interfaces = { - .dma_map = tioce_dma, - .dma_map_consistent = tioce_dma_consistent, - .dma_unmap = tioce_dma_unmap, - .bus_fixup = tioce_bus_fixup, - .force_interrupt = tioce_force_interrupt, - .target_interrupt = tioce_target_interrupt -}; - -/** - * tioce_init_provider - init SN PCI provider ops for TIO CE - */ -int -tioce_init_provider(void) -{ - sn_pci_provider[PCIIO_ASIC_TYPE_TIOCE] = &tioce_pci_interfaces; - return 0; -} |