2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 * Copyright (C) 2013 Freescale Semiconductor, Inc.
19 #define pr_fmt(fmt) "fsl-pamu: %s: " fmt, __func__
21 #include <linux/init.h>
22 #include <linux/iommu.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/types.h>
27 #include <linux/interrupt.h>
28 #include <linux/device.h>
29 #include <linux/of_platform.h>
30 #include <linux/bootmem.h>
31 #include <linux/genalloc.h>
33 #include <asm/bitops.h>
34 #include <asm/fsl_guts.h>
38 /* define indexes for each operation mapping scenario */
41 #define OMI_QMAN_PRIV 0x02
44 #define make64(high, low) (((u64)(high) << 32) | (low))
46 struct pamu_isr_data {
47 void __iomem *pamu_reg_base; /* Base address of PAMU regs*/
48 unsigned int count; /* The number of PAMUs */
51 static struct paace *ppaact;
52 static struct paace *spaact;
53 static struct ome *omt;
56 * Table for matching compatible strings, for device tree
57 * guts node, for QorIQ SOCs.
58 * "fsl,qoriq-device-config-2.0" corresponds to T4 & B4
59 * SOCs. For the older SOCs "fsl,qoriq-device-config-1.0"
60 * string would be used.
62 static const struct of_device_id guts_device_ids[] = {
63 { .compatible = "fsl,qoriq-device-config-1.0", },
64 { .compatible = "fsl,qoriq-device-config-2.0", },
70 * Table for matching compatible strings, for device tree
71 * L3 cache controller node.
72 * "fsl,t4240-l3-cache-controller" corresponds to T4,
73 * "fsl,b4860-l3-cache-controller" corresponds to B4 &
74 * "fsl,p4080-l3-cache-controller" corresponds to other,
77 static const struct of_device_id l3_device_ids[] = {
78 { .compatible = "fsl,t4240-l3-cache-controller", },
79 { .compatible = "fsl,b4860-l3-cache-controller", },
80 { .compatible = "fsl,p4080-l3-cache-controller", },
84 /* maximum subwindows permitted per liodn */
85 static u32 max_subwindow_count;
87 /* Pool for fspi allocation */
88 struct gen_pool *spaace_pool;
91 * pamu_get_max_subwin_cnt() - Return the maximum supported
92 * subwindow count per liodn.
95 u32 pamu_get_max_subwin_cnt(void)
97 return max_subwindow_count;
101 * pamu_get_ppaace() - Return the primary PACCE
102 * @liodn: liodn PAACT index for desired PAACE
104 * Returns the ppace pointer upon success else return
107 static struct paace *pamu_get_ppaace(int liodn)
109 if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) {
110 pr_debug("PPAACT doesn't exist\n");
114 return &ppaact[liodn];
118 * pamu_enable_liodn() - Set valid bit of PACCE
119 * @liodn: liodn PAACT index for desired PAACE
121 * Returns 0 upon success else error code < 0 returned
123 int pamu_enable_liodn(int liodn)
125 struct paace *ppaace;
127 ppaace = pamu_get_ppaace(liodn);
129 pr_debug("Invalid primary paace entry\n");
133 if (!get_bf(ppaace->addr_bitfields, PPAACE_AF_WSE)) {
134 pr_debug("liodn %d not configured\n", liodn);
138 /* Ensure that all other stores to the ppaace complete first */
141 set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID);
148 * pamu_disable_liodn() - Clears valid bit of PACCE
149 * @liodn: liodn PAACT index for desired PAACE
151 * Returns 0 upon success else error code < 0 returned
153 int pamu_disable_liodn(int liodn)
155 struct paace *ppaace;
157 ppaace = pamu_get_ppaace(liodn);
159 pr_debug("Invalid primary paace entry\n");
163 set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_INVALID);
169 /* Derive the window size encoding for a particular PAACE entry */
170 static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size)
172 /* Bug if not a power of 2 */
173 BUG_ON((addrspace_size & (addrspace_size - 1)));
175 /* window size is 2^(WSE+1) bytes */
176 return fls64(addrspace_size) - 2;
179 /* Derive the PAACE window count encoding for the subwindow count */
180 static unsigned int map_subwindow_cnt_to_wce(u32 subwindow_cnt)
182 /* window count is 2^(WCE+1) bytes */
183 return __ffs(subwindow_cnt) - 1;
187 * Set the PAACE type as primary and set the coherency required domain
190 static void pamu_init_ppaace(struct paace *ppaace)
192 set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
194 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
195 PAACE_M_COHERENCE_REQ);
199 * Set the PAACE type as secondary and set the coherency required domain
202 static void pamu_init_spaace(struct paace *spaace)
204 set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY);
205 set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
206 PAACE_M_COHERENCE_REQ);
210 * Return the spaace (corresponding to the secondary window index)
211 * for a particular ppaace.
213 static struct paace *pamu_get_spaace(struct paace *paace, u32 wnum)
216 struct paace *spaace = NULL;
218 subwin_cnt = 1UL << (get_bf(paace->impl_attr, PAACE_IA_WCE) + 1);
220 if (wnum < subwin_cnt)
221 spaace = &spaact[paace->fspi + wnum];
223 pr_debug("secondary paace out of bounds\n");
229 * pamu_get_fspi_and_allocate() - Allocates fspi index and reserves subwindows
230 * required for primary PAACE in the secondary
232 * @subwin_cnt: Number of subwindows to be reserved.
234 * A PPAACE entry may have a number of associated subwindows. A subwindow
235 * corresponds to a SPAACE entry in the SPAACT table. Each PAACE entry stores
236 * the index (fspi) of the first SPAACE entry in the SPAACT table. This
237 * function returns the index of the first SPAACE entry. The remaining
238 * SPAACE entries are reserved contiguously from that index.
240 * Returns a valid fspi index in the range of 0 - SPAACE_NUMBER_ENTRIES on success.
241 * If no SPAACE entry is available or the allocator can not reserve the required
242 * number of contiguous entries function returns ULONG_MAX indicating a failure.
245 static unsigned long pamu_get_fspi_and_allocate(u32 subwin_cnt)
247 unsigned long spaace_addr;
249 spaace_addr = gen_pool_alloc(spaace_pool, subwin_cnt * sizeof(struct paace));
253 return (spaace_addr - (unsigned long)spaact) / (sizeof(struct paace));
256 /* Release the subwindows reserved for a particular LIODN */
257 void pamu_free_subwins(int liodn)
259 struct paace *ppaace;
260 u32 subwin_cnt, size;
262 ppaace = pamu_get_ppaace(liodn);
264 pr_debug("Invalid liodn entry\n");
268 if (get_bf(ppaace->addr_bitfields, PPAACE_AF_MW)) {
269 subwin_cnt = 1UL << (get_bf(ppaace->impl_attr, PAACE_IA_WCE) + 1);
270 size = (subwin_cnt - 1) * sizeof(struct paace);
271 gen_pool_free(spaace_pool, (unsigned long)&spaact[ppaace->fspi], size);
272 set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0);
277 * Function used for updating stash destination for the coressponding
280 int pamu_update_paace_stash(int liodn, u32 subwin, u32 value)
284 paace = pamu_get_ppaace(liodn);
286 pr_debug("Invalid liodn entry\n");
290 paace = pamu_get_spaace(paace, subwin - 1);
295 set_bf(paace->impl_attr, PAACE_IA_CID, value);
302 /* Disable a subwindow corresponding to the LIODN */
303 int pamu_disable_spaace(int liodn, u32 subwin)
307 paace = pamu_get_ppaace(liodn);
309 pr_debug("Invalid liodn entry\n");
313 paace = pamu_get_spaace(paace, subwin - 1);
317 set_bf(paace->addr_bitfields, PAACE_AF_V,
320 set_bf(paace->addr_bitfields, PAACE_AF_AP,
321 PAACE_AP_PERMS_DENIED);
331 * pamu_config_paace() - Sets up PPAACE entry for specified liodn
333 * @liodn: Logical IO device number
334 * @win_addr: starting address of DSA window
335 * @win-size: size of DSA window
336 * @omi: Operation mapping index -- if ~omi == 0 then omi not defined
337 * @rpn: real (true physical) page number
338 * @stashid: cache stash id for associated cpu -- if ~stashid == 0 then
339 * stashid not defined
340 * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then
341 * snoopid not defined
342 * @subwin_cnt: number of sub-windows
343 * @prot: window permissions
345 * Returns 0 upon success else error code < 0 returned
347 int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size,
348 u32 omi, unsigned long rpn, u32 snoopid, u32 stashid,
349 u32 subwin_cnt, int prot)
351 struct paace *ppaace;
354 if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE) {
355 pr_debug("window size too small or not a power of two %llx\n", win_size);
359 if (win_addr & (win_size - 1)) {
360 pr_debug("window address is not aligned with window size\n");
364 ppaace = pamu_get_ppaace(liodn);
369 /* window size is 2^(WSE+1) bytes */
370 set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
371 map_addrspace_size_to_wse(win_size));
373 pamu_init_ppaace(ppaace);
375 ppaace->wbah = win_addr >> (PAMU_PAGE_SHIFT + 20);
376 set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL,
377 (win_addr >> PAMU_PAGE_SHIFT));
379 /* set up operation mapping if it's configured */
380 if (omi < OME_NUMBER_ENTRIES) {
381 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
382 ppaace->op_encode.index_ot.omi = omi;
383 } else if (~omi != 0) {
384 pr_debug("bad operation mapping index: %d\n", omi);
388 /* configure stash id */
390 set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);
392 /* configure snoop id */
394 ppaace->domain_attr.to_host.snpid = snoopid;
397 /* The first entry is in the primary PAACE instead */
398 fspi = pamu_get_fspi_and_allocate(subwin_cnt - 1);
399 if (fspi == ULONG_MAX) {
400 pr_debug("spaace indexes exhausted\n");
404 /* window count is 2^(WCE+1) bytes */
405 set_bf(ppaace->impl_attr, PAACE_IA_WCE,
406 map_subwindow_cnt_to_wce(subwin_cnt));
407 set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1);
410 set_bf(ppaace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE);
411 ppaace->twbah = rpn >> 20;
412 set_bf(ppaace->win_bitfields, PAACE_WIN_TWBAL, rpn);
413 set_bf(ppaace->addr_bitfields, PAACE_AF_AP, prot);
414 set_bf(ppaace->impl_attr, PAACE_IA_WCE, 0);
415 set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0);
423 * pamu_config_spaace() - Sets up SPAACE entry for specified subwindow
425 * @liodn: Logical IO device number
426 * @subwin_cnt: number of sub-windows associated with dma-window
427 * @subwin: subwindow index
428 * @subwin_size: size of subwindow
429 * @omi: Operation mapping index
430 * @rpn: real (true physical) page number
431 * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then
432 * snoopid not defined
433 * @stashid: cache stash id for associated cpu
434 * @enable: enable/disable subwindow after reconfiguration
435 * @prot: sub window permissions
437 * Returns 0 upon success else error code < 0 returned
439 int pamu_config_spaace(int liodn, u32 subwin_cnt, u32 subwin,
440 phys_addr_t subwin_size, u32 omi, unsigned long rpn,
441 u32 snoopid, u32 stashid, int enable, int prot)
446 /* setup sub-windows */
448 pr_debug("Invalid subwindow count\n");
452 paace = pamu_get_ppaace(liodn);
453 if (subwin > 0 && subwin < subwin_cnt && paace) {
454 paace = pamu_get_spaace(paace, subwin - 1);
456 if (paace && !(paace->addr_bitfields & PAACE_V_VALID)) {
457 pamu_init_spaace(paace);
458 set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn);
463 pr_debug("Invalid liodn entry\n");
467 if ((subwin_size & (subwin_size - 1)) || subwin_size < PAMU_PAGE_SIZE) {
468 pr_debug("subwindow size out of range, or not a power of 2\n");
472 if (rpn == ULONG_MAX) {
473 pr_debug("real page number out of range\n");
477 /* window size is 2^(WSE+1) bytes */
478 set_bf(paace->win_bitfields, PAACE_WIN_SWSE,
479 map_addrspace_size_to_wse(subwin_size));
481 set_bf(paace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE);
482 paace->twbah = rpn >> 20;
483 set_bf(paace->win_bitfields, PAACE_WIN_TWBAL, rpn);
484 set_bf(paace->addr_bitfields, PAACE_AF_AP, prot);
486 /* configure snoop id */
488 paace->domain_attr.to_host.snpid = snoopid;
490 /* set up operation mapping if it's configured */
491 if (omi < OME_NUMBER_ENTRIES) {
492 set_bf(paace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
493 paace->op_encode.index_ot.omi = omi;
494 } else if (~omi != 0) {
495 pr_debug("bad operation mapping index: %d\n", omi);
500 set_bf(paace->impl_attr, PAACE_IA_CID, stashid);
505 set_bf(paace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID);
513 * get_ome_index() - Returns the index in the operation mapping table
515 * @*omi_index: pointer for storing the index value
518 void get_ome_index(u32 *omi_index, struct device *dev)
520 if (of_device_is_compatible(dev->of_node, "fsl,qman-portal"))
521 *omi_index = OMI_QMAN;
522 if (of_device_is_compatible(dev->of_node, "fsl,qman"))
523 *omi_index = OMI_QMAN_PRIV;
527 * get_stash_id - Returns stash destination id corresponding to a
528 * cache type and vcpu.
529 * @stash_dest_hint: L1, L2 or L3
530 * @vcpu: vpcu target for a particular cache type.
532 * Returs stash on success or ~(u32)0 on failure.
535 u32 get_stash_id(u32 stash_dest_hint, u32 vcpu)
538 struct device_node *node;
543 /* Fastpath, exit early if L3/CPC cache is target for stashing */
544 if (stash_dest_hint == PAMU_ATTR_CACHE_L3) {
545 node = of_find_matching_node(NULL, l3_device_ids);
547 prop = of_get_property(node, "cache-stash-id", 0);
549 pr_debug("missing cache-stash-id at %s\n", node->full_name);
554 return be32_to_cpup(prop);
559 for_each_node_by_type(node, "cpu") {
560 prop = of_get_property(node, "reg", &len);
561 for (i = 0; i < len / sizeof(u32); i++) {
562 if (be32_to_cpup(&prop[i]) == vcpu) {
570 /* find the hwnode that represents the cache */
571 for (cache_level = PAMU_ATTR_CACHE_L1; (cache_level < PAMU_ATTR_CACHE_L3) && found; cache_level++) {
572 if (stash_dest_hint == cache_level) {
573 prop = of_get_property(node, "cache-stash-id", 0);
575 pr_debug("missing cache-stash-id at %s\n", node->full_name);
580 return be32_to_cpup(prop);
583 prop = of_get_property(node, "next-level-cache", 0);
585 pr_debug("can't find next-level-cache at %s\n",
588 return ~(u32)0; /* can't traverse any further */
592 /* advance to next node in cache hierarchy */
593 node = of_find_node_by_phandle(*prop);
595 pr_debug("Invalid node for cache hierarchy\n");
600 pr_debug("stash dest not found for %d on vcpu %d\n",
601 stash_dest_hint, vcpu);
605 /* Identify if the PAACT table entry belongs to QMAN, BMAN or QMAN Portal */
607 #define QMAN_PORTAL_PAACE 2
611 * Setup operation mapping and stash destinations for QMAN and QMAN portal.
612 * Memory accesses to QMAN and BMAN private memory need not be coherent, so
613 * clear the PAACE entry coherency attribute for them.
615 static void setup_qbman_paace(struct paace *ppaace, int paace_type)
617 switch (paace_type) {
619 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
620 ppaace->op_encode.index_ot.omi = OMI_QMAN_PRIV;
621 /* setup QMAN Private data stashing for the L3 cache */
622 set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0));
623 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
626 case QMAN_PORTAL_PAACE:
627 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
628 ppaace->op_encode.index_ot.omi = OMI_QMAN;
629 /*Set DQRR and Frame stashing for the L3 cache */
630 set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0));
633 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
640 * Setup the operation mapping table for various devices. This is a static
641 * table where each table index corresponds to a particular device. PAMU uses
642 * this table to translate device transaction to appropriate corenet
645 static void __init setup_omt(struct ome *omt)
649 /* Configure OMI_QMAN */
650 ome = &omt[OMI_QMAN];
652 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
653 ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
654 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
655 ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSAO;
657 ome->moe[IOE_DIRECT0_IDX] = EOE_VALID | EOE_LDEC;
658 ome->moe[IOE_DIRECT1_IDX] = EOE_VALID | EOE_LDECPE;
660 /* Configure OMI_FMAN */
661 ome = &omt[OMI_FMAN];
662 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
663 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
665 /* Configure OMI_QMAN private */
666 ome = &omt[OMI_QMAN_PRIV];
667 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
668 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
669 ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
670 ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSA;
672 /* Configure OMI_CAAM */
673 ome = &omt[OMI_CAAM];
674 ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
675 ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
679 * Get the maximum number of PAACT table entries
680 * and subwindows supported by PAMU
682 static void get_pamu_cap_values(unsigned long pamu_reg_base)
686 pc_val = in_be32((u32 *)(pamu_reg_base + PAMU_PC3));
687 /* Maximum number of subwindows per liodn */
688 max_subwindow_count = 1 << (1 + PAMU_PC3_MWCE(pc_val));
691 /* Setup PAMU registers pointing to PAACT, SPAACT and OMT */
692 int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size,
693 phys_addr_t ppaact_phys, phys_addr_t spaact_phys,
694 phys_addr_t omt_phys)
697 struct pamu_mmap_regs *pamu_regs;
699 pc = (u32 *) (pamu_reg_base + PAMU_PC);
700 pamu_regs = (struct pamu_mmap_regs *)
701 (pamu_reg_base + PAMU_MMAP_REGS_BASE);
703 /* set up pointers to corenet control blocks */
705 out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys));
706 out_be32(&pamu_regs->ppbal, lower_32_bits(ppaact_phys));
707 ppaact_phys = ppaact_phys + PAACT_SIZE;
708 out_be32(&pamu_regs->pplah, upper_32_bits(ppaact_phys));
709 out_be32(&pamu_regs->pplal, lower_32_bits(ppaact_phys));
711 out_be32(&pamu_regs->spbah, upper_32_bits(spaact_phys));
712 out_be32(&pamu_regs->spbal, lower_32_bits(spaact_phys));
713 spaact_phys = spaact_phys + SPAACT_SIZE;
714 out_be32(&pamu_regs->splah, upper_32_bits(spaact_phys));
715 out_be32(&pamu_regs->splal, lower_32_bits(spaact_phys));
717 out_be32(&pamu_regs->obah, upper_32_bits(omt_phys));
718 out_be32(&pamu_regs->obal, lower_32_bits(omt_phys));
719 omt_phys = omt_phys + OMT_SIZE;
720 out_be32(&pamu_regs->olah, upper_32_bits(omt_phys));
721 out_be32(&pamu_regs->olal, lower_32_bits(omt_phys));
724 * set PAMU enable bit,
725 * allow ppaact & omt to be cached
726 * & enable PAMU access violation interrupts.
729 out_be32((u32 *)(pamu_reg_base + PAMU_PICS),
730 PAMU_ACCESS_VIOLATION_ENABLE);
731 out_be32(pc, PAMU_PC_PE | PAMU_PC_OCE | PAMU_PC_SPCC | PAMU_PC_PPCC);
735 /* Enable all device LIODNS */
736 static void __init setup_liodns(void)
739 struct paace *ppaace;
740 struct device_node *node = NULL;
743 for_each_node_with_property(node, "fsl,liodn") {
744 prop = of_get_property(node, "fsl,liodn", &len);
745 for (i = 0; i < len / sizeof(u32); i++) {
748 liodn = be32_to_cpup(&prop[i]);
749 if (liodn >= PAACE_NUMBER_ENTRIES) {
750 pr_debug("Invalid LIODN value %d\n", liodn);
753 ppaace = pamu_get_ppaace(liodn);
754 pamu_init_ppaace(ppaace);
755 /* window size is 2^(WSE+1) bytes */
756 set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35);
758 set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0);
759 set_bf(ppaace->impl_attr, PAACE_IA_ATM,
761 set_bf(ppaace->addr_bitfields, PAACE_AF_AP,
763 if (of_device_is_compatible(node, "fsl,qman-portal"))
764 setup_qbman_paace(ppaace, QMAN_PORTAL_PAACE);
765 if (of_device_is_compatible(node, "fsl,qman"))
766 setup_qbman_paace(ppaace, QMAN_PAACE);
767 if (of_device_is_compatible(node, "fsl,bman"))
768 setup_qbman_paace(ppaace, BMAN_PAACE);
770 pamu_enable_liodn(liodn);
775 irqreturn_t pamu_av_isr(int irq, void *arg)
777 struct pamu_isr_data *data = arg;
779 unsigned int i, j, ret;
781 pr_emerg("access violation interrupt\n");
783 for (i = 0; i < data->count; i++) {
784 void __iomem *p = data->pamu_reg_base + i * PAMU_OFFSET;
785 u32 pics = in_be32(p + PAMU_PICS);
787 if (pics & PAMU_ACCESS_VIOLATION_STAT) {
788 u32 avs1 = in_be32(p + PAMU_AVS1);
791 pr_emerg("POES1=%08x\n", in_be32(p + PAMU_POES1));
792 pr_emerg("POES2=%08x\n", in_be32(p + PAMU_POES2));
793 pr_emerg("AVS1=%08x\n", avs1);
794 pr_emerg("AVS2=%08x\n", in_be32(p + PAMU_AVS2));
795 pr_emerg("AVA=%016llx\n", make64(in_be32(p + PAMU_AVAH),
796 in_be32(p + PAMU_AVAL)));
797 pr_emerg("UDAD=%08x\n", in_be32(p + PAMU_UDAD));
798 pr_emerg("POEA=%016llx\n", make64(in_be32(p + PAMU_POEAH),
799 in_be32(p + PAMU_POEAL)));
801 phys = make64(in_be32(p + PAMU_POEAH),
802 in_be32(p + PAMU_POEAL));
804 /* Assume that POEA points to a PAACE */
806 u32 *paace = phys_to_virt(phys);
808 /* Only the first four words are relevant */
809 for (j = 0; j < 4; j++)
810 pr_emerg("PAACE[%u]=%08x\n", j, in_be32(paace + j));
813 /* clear access violation condition */
814 out_be32((p + PAMU_AVS1), avs1 & PAMU_AV_MASK);
815 paace = pamu_get_ppaace(avs1 >> PAMU_AVS1_LIODN_SHIFT);
817 /* check if we got a violation for a disabled LIODN */
818 if (!get_bf(paace->addr_bitfields, PAACE_AF_V)) {
820 * As per hardware erratum A-003638, access
821 * violation can be reported for a disabled
822 * LIODN. If we hit that condition, disable
823 * access violation reporting.
825 pics &= ~PAMU_ACCESS_VIOLATION_ENABLE;
827 /* Disable the LIODN */
828 ret = pamu_disable_liodn(avs1 >> PAMU_AVS1_LIODN_SHIFT);
830 pr_emerg("Disabling liodn %x\n", avs1 >> PAMU_AVS1_LIODN_SHIFT);
832 out_be32((p + PAMU_PICS), pics);
840 #define LAWAR_EN 0x80000000
841 #define LAWAR_TARGET_MASK 0x0FF00000
842 #define LAWAR_TARGET_SHIFT 20
843 #define LAWAR_SIZE_MASK 0x0000003F
844 #define LAWAR_CSDID_MASK 0x000FF000
845 #define LAWAR_CSDID_SHIFT 12
847 #define LAW_SIZE_4K 0xb
850 u32 lawbarh; /* LAWn base address high */
851 u32 lawbarl; /* LAWn base address low */
852 u32 lawar; /* LAWn attributes */
857 * Create a coherence subdomain for a given memory block.
859 static int __init create_csd(phys_addr_t phys, size_t size, u32 csd_port_id)
861 struct device_node *np;
863 void __iomem *lac = NULL; /* Local Access Control registers */
864 struct ccsr_law __iomem *law;
865 void __iomem *ccm = NULL;
867 unsigned int i, num_laws, num_csds;
872 np = of_find_compatible_node(NULL, NULL, "fsl,corenet-law");
876 iprop = of_get_property(np, "fsl,num-laws", NULL);
882 num_laws = be32_to_cpup(iprop);
888 lac = of_iomap(np, 0);
894 /* LAW registers are at offset 0xC00 */
899 np = of_find_compatible_node(NULL, NULL, "fsl,corenet-cf");
905 iprop = of_get_property(np, "fsl,ccf-num-csdids", NULL);
911 num_csds = be32_to_cpup(iprop);
917 ccm = of_iomap(np, 0);
923 /* The undocumented CSDID registers are at offset 0x600 */
924 csdids = ccm + 0x600;
929 /* Find an unused coherence subdomain ID */
930 for (csd_id = 0; csd_id < num_csds; csd_id++) {
935 /* Store the Port ID in the (undocumented) proper CIDMRxx register */
936 csdids[csd_id] = csd_port_id;
938 /* Find the DDR LAW that maps to our buffer. */
939 for (i = 0; i < num_laws; i++) {
940 if (law[i].lawar & LAWAR_EN) {
941 phys_addr_t law_start, law_end;
943 law_start = make64(law[i].lawbarh, law[i].lawbarl);
944 law_end = law_start +
945 (2ULL << (law[i].lawar & LAWAR_SIZE_MASK));
947 if (law_start <= phys && phys < law_end) {
948 law_target = law[i].lawar & LAWAR_TARGET_MASK;
954 if (i == 0 || i == num_laws) {
955 /* This should never happen*/
960 /* Find a free LAW entry */
961 while (law[--i].lawar & LAWAR_EN) {
963 /* No higher priority LAW slots available */
969 law[i].lawbarh = upper_32_bits(phys);
970 law[i].lawbarl = lower_32_bits(phys);
972 law[i].lawar = LAWAR_EN | law_target | (csd_id << LAWAR_CSDID_SHIFT) |
973 (LAW_SIZE_4K + get_order(size));
990 * Table of SVRs and the corresponding PORT_ID values. Port ID corresponds to a
991 * bit map of snoopers for a given range of memory mapped by a LAW.
993 * All future CoreNet-enabled SOCs will have this erratum(A-004510) fixed, so this
994 * table should never need to be updated. SVRs are guaranteed to be unique, so
995 * there is no worry that a future SOC will inadvertently have one of these
998 static const struct {
1002 {0x82100010, 0xFF000000}, /* P2040 1.0 */
1003 {0x82100011, 0xFF000000}, /* P2040 1.1 */
1004 {0x82100110, 0xFF000000}, /* P2041 1.0 */
1005 {0x82100111, 0xFF000000}, /* P2041 1.1 */
1006 {0x82110310, 0xFF000000}, /* P3041 1.0 */
1007 {0x82110311, 0xFF000000}, /* P3041 1.1 */
1008 {0x82010020, 0xFFF80000}, /* P4040 2.0 */
1009 {0x82000020, 0xFFF80000}, /* P4080 2.0 */
1010 {0x82210010, 0xFC000000}, /* P5010 1.0 */
1011 {0x82210020, 0xFC000000}, /* P5010 2.0 */
1012 {0x82200010, 0xFC000000}, /* P5020 1.0 */
1013 {0x82050010, 0xFF800000}, /* P5021 1.0 */
1014 {0x82040010, 0xFF800000}, /* P5040 1.0 */
1017 #define SVR_SECURITY 0x80000 /* The Security (E) bit */
1019 static int __init fsl_pamu_probe(struct platform_device *pdev)
1021 void __iomem *pamu_regs = NULL;
1022 struct ccsr_guts __iomem *guts_regs = NULL;
1023 u32 pamubypenr, pamu_counter;
1024 unsigned long pamu_reg_off;
1025 unsigned long pamu_reg_base;
1026 struct pamu_isr_data *data = NULL;
1027 struct device_node *guts_node;
1032 phys_addr_t ppaact_phys;
1033 phys_addr_t spaact_phys;
1034 phys_addr_t omt_phys;
1035 size_t mem_size = 0;
1036 unsigned int order = 0;
1037 u32 csd_port_id = 0;
1040 * enumerate all PAMUs and allocate and setup PAMU tables
1042 * NOTE : All PAMUs share the same LIODN tables.
1045 pamu_regs = of_iomap(pdev->dev.of_node, 0);
1047 dev_err(&pdev->dev, "ioremap of PAMU node failed\n");
1050 of_get_address(pdev->dev.of_node, 0, &size, NULL);
1052 irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1053 if (irq == NO_IRQ) {
1054 dev_warn(&pdev->dev, "no interrupts listed in PAMU node\n");
1058 data = kzalloc(sizeof(struct pamu_isr_data), GFP_KERNEL);
1060 dev_err(&pdev->dev, "PAMU isr data memory allocation failed\n");
1064 data->pamu_reg_base = pamu_regs;
1065 data->count = size / PAMU_OFFSET;
1067 /* The ISR needs access to the regs, so we won't iounmap them */
1068 ret = request_irq(irq, pamu_av_isr, 0, "pamu", data);
1070 dev_err(&pdev->dev, "error %i installing ISR for irq %i\n",
1075 guts_node = of_find_matching_node(NULL, guts_device_ids);
1077 dev_err(&pdev->dev, "could not find GUTS node %s\n",
1078 pdev->dev.of_node->full_name);
1083 guts_regs = of_iomap(guts_node, 0);
1084 of_node_put(guts_node);
1086 dev_err(&pdev->dev, "ioremap of GUTS node failed\n");
1091 /* read in the PAMU capability registers */
1092 get_pamu_cap_values((unsigned long)pamu_regs);
1094 * To simplify the allocation of a coherency domain, we allocate the
1095 * PAACT and the OMT in the same memory buffer. Unfortunately, this
1096 * wastes more memory compared to allocating the buffers separately.
1098 /* Determine how much memory we need */
1099 mem_size = (PAGE_SIZE << get_order(PAACT_SIZE)) +
1100 (PAGE_SIZE << get_order(SPAACT_SIZE)) +
1101 (PAGE_SIZE << get_order(OMT_SIZE));
1102 order = get_order(mem_size);
1104 p = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
1106 dev_err(&pdev->dev, "unable to allocate PAACT/SPAACT/OMT block\n");
1111 ppaact = page_address(p);
1112 ppaact_phys = page_to_phys(p);
1114 /* Make sure the memory is naturally aligned */
1115 if (ppaact_phys & ((PAGE_SIZE << order) - 1)) {
1116 dev_err(&pdev->dev, "PAACT/OMT block is unaligned\n");
1121 spaact = (void *)ppaact + (PAGE_SIZE << get_order(PAACT_SIZE));
1122 omt = (void *)spaact + (PAGE_SIZE << get_order(SPAACT_SIZE));
1124 dev_dbg(&pdev->dev, "ppaact virt=%p phys=0x%llx\n", ppaact,
1125 (unsigned long long) ppaact_phys);
1127 /* Check to see if we need to implement the work-around on this SOC */
1129 /* Determine the Port ID for our coherence subdomain */
1130 for (i = 0; i < ARRAY_SIZE(port_id_map); i++) {
1131 if (port_id_map[i].svr == (mfspr(SPRN_SVR) & ~SVR_SECURITY)) {
1132 csd_port_id = port_id_map[i].port_id;
1133 dev_dbg(&pdev->dev, "found matching SVR %08x\n",
1134 port_id_map[i].svr);
1140 dev_dbg(&pdev->dev, "creating coherency subdomain at address "
1141 "0x%llx, size %zu, port id 0x%08x", ppaact_phys,
1142 mem_size, csd_port_id);
1144 ret = create_csd(ppaact_phys, mem_size, csd_port_id);
1146 dev_err(&pdev->dev, "could not create coherence "
1152 spaact_phys = virt_to_phys(spaact);
1153 omt_phys = virt_to_phys(omt);
1155 spaace_pool = gen_pool_create(ilog2(sizeof(struct paace)), -1);
1158 dev_err(&pdev->dev, "PAMU : failed to allocate spaace gen pool\n");
1162 ret = gen_pool_add(spaace_pool, (unsigned long)spaact, SPAACT_SIZE, -1);
1166 pamubypenr = in_be32(&guts_regs->pamubypenr);
1168 for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size;
1169 pamu_reg_off += PAMU_OFFSET, pamu_counter >>= 1) {
1171 pamu_reg_base = (unsigned long) pamu_regs + pamu_reg_off;
1172 setup_one_pamu(pamu_reg_base, pamu_reg_off, ppaact_phys,
1173 spaact_phys, omt_phys);
1174 /* Disable PAMU bypass for this PAMU */
1175 pamubypenr &= ~pamu_counter;
1180 /* Enable all relevant PAMU(s) */
1181 out_be32(&guts_regs->pamubypenr, pamubypenr);
1185 /* Enable DMA for the LIODNs in the device tree*/
1192 gen_pool_destroy(spaace_pool);
1196 free_irq(irq, data);
1199 memset(data, 0, sizeof(struct pamu_isr_data));
1210 free_pages((unsigned long)ppaact, order);
1217 static const struct of_device_id fsl_of_pamu_ids[] = {
1219 .compatible = "fsl,p4080-pamu",
1222 .compatible = "fsl,pamu",
1227 static struct platform_driver fsl_of_pamu_driver = {
1229 .name = "fsl-of-pamu",
1230 .owner = THIS_MODULE,
1232 .probe = fsl_pamu_probe,
1235 static __init int fsl_pamu_init(void)
1237 struct platform_device *pdev = NULL;
1238 struct device_node *np;
1242 * The normal OF process calls the probe function at some
1243 * indeterminate later time, after most drivers have loaded. This is
1244 * too late for us, because PAMU clients (like the Qman driver)
1245 * depend on PAMU being initialized early.
1247 * So instead, we "manually" call our probe function by creating the
1248 * platform devices ourselves.
1252 * We assume that there is only one PAMU node in the device tree. A
1253 * single PAMU node represents all of the PAMU devices in the SOC
1254 * already. Everything else already makes that assumption, and the
1255 * binding for the PAMU nodes doesn't allow for any parent-child
1256 * relationships anyway. In other words, support for more than one
1257 * PAMU node would require significant changes to a lot of code.
1260 np = of_find_compatible_node(NULL, NULL, "fsl,pamu");
1262 pr_err("could not find a PAMU node\n");
1266 ret = platform_driver_register(&fsl_of_pamu_driver);
1268 pr_err("could not register driver (err=%i)\n", ret);
1269 goto error_driver_register;
1272 pdev = platform_device_alloc("fsl-of-pamu", 0);
1274 pr_err("could not allocate device %s\n",
1277 goto error_device_alloc;
1279 pdev->dev.of_node = of_node_get(np);
1281 ret = pamu_domain_init();
1283 goto error_device_add;
1285 ret = platform_device_add(pdev);
1287 pr_err("could not add device %s (err=%i)\n",
1288 np->full_name, ret);
1289 goto error_device_add;
1295 of_node_put(pdev->dev.of_node);
1296 pdev->dev.of_node = NULL;
1298 platform_device_put(pdev);
1301 platform_driver_unregister(&fsl_of_pamu_driver);
1303 error_driver_register:
1308 arch_initcall(fsl_pamu_init);