diff options
Diffstat (limited to 'linux/drivers/soc/fsl/qbman/bman_ccsr.c')
| -rw-r--r-- | linux/drivers/soc/fsl/qbman/bman_ccsr.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/linux/drivers/soc/fsl/qbman/bman_ccsr.c b/linux/drivers/soc/fsl/qbman/bman_ccsr.c new file mode 100644 index 00000000..1df1d9c8 --- /dev/null +++ b/linux/drivers/soc/fsl/qbman/bman_ccsr.c @@ -0,0 +1,392 @@ +#include <machine/rtems-bsd-kernel-space.h> + +#include <rtems/bsd/local/opt_dpaa.h> + +/* Copyright (c) 2009 - 2016 Freescale Semiconductor, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Freescale Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "bman_priv.h" + +u16 bman_ip_rev; +EXPORT_SYMBOL(bman_ip_rev); + +/* Register offsets */ +#define REG_FBPR_FPC 0x0800 +#define REG_ECSR 0x0a00 +#define REG_ECIR 0x0a04 +#define REG_EADR 0x0a08 +#define REG_EDATA(n) (0x0a10 + ((n) * 0x04)) +#define REG_SBEC(n) (0x0a80 + ((n) * 0x04)) +#define REG_IP_REV_1 0x0bf8 +#define REG_IP_REV_2 0x0bfc +#define REG_FBPR_BARE 0x0c00 +#define REG_FBPR_BAR 0x0c04 +#define REG_FBPR_AR 0x0c10 +#define REG_SRCIDR 0x0d04 +#define REG_LIODNR 0x0d08 +#define REG_ERR_ISR 0x0e00 +#define REG_ERR_IER 0x0e04 +#define REG_ERR_ISDR 0x0e08 + +/* Used by all error interrupt registers except 'inhibit' */ +#define BM_EIRQ_IVCI 0x00000010 /* Invalid Command Verb */ +#define BM_EIRQ_FLWI 0x00000008 /* FBPR Low Watermark */ +#define BM_EIRQ_MBEI 0x00000004 /* Multi-bit ECC Error */ +#define BM_EIRQ_SBEI 0x00000002 /* Single-bit ECC Error */ +#define BM_EIRQ_BSCN 0x00000001 /* pool State Change Notification */ + +struct bman_hwerr_txt { + u32 mask; + const char *txt; +}; + +static const struct bman_hwerr_txt bman_hwerr_txts[] = { + { BM_EIRQ_IVCI, "Invalid Command Verb" }, + { BM_EIRQ_FLWI, "FBPR Low Watermark" }, + { BM_EIRQ_MBEI, "Multi-bit ECC Error" }, + { BM_EIRQ_SBEI, "Single-bit ECC Error" }, + { BM_EIRQ_BSCN, "Pool State Change Notification" }, +}; + +/* Only trigger low water mark interrupt once only */ +#define BMAN_ERRS_TO_DISABLE BM_EIRQ_FLWI + +/* Pointer to the start of the BMan's CCSR space */ +static u32 __iomem *bm_ccsr_start; + +static inline u32 bm_ccsr_in(u32 offset) +{ + return ioread32be(bm_ccsr_start + offset/4); +} +static inline void bm_ccsr_out(u32 offset, u32 val) +{ + iowrite32be(val, bm_ccsr_start + offset/4); +} + +static void bm_get_version(u16 *id, u8 *major, u8 *minor) +{ + u32 v = bm_ccsr_in(REG_IP_REV_1); + *id = (v >> 16); + *major = (v >> 8) & 0xff; + *minor = v & 0xff; +} + +/* signal transactions for FBPRs with higher priority */ +#define FBPR_AR_RPRIO_HI BIT(30) + +static void bm_set_memory(u64 ba, u32 size) +{ + u32 exp = ilog2(size); + /* choke if size isn't within range */ + DPAA_ASSERT(size >= 4096 && size <= 1024*1024*1024 && + is_power_of_2(size)); + /* choke if '[e]ba' has lower-alignment than 'size' */ + DPAA_ASSERT(!(ba & (size - 1))); + bm_ccsr_out(REG_FBPR_BARE, upper_32_bits(ba)); + bm_ccsr_out(REG_FBPR_BAR, lower_32_bits(ba)); + bm_ccsr_out(REG_FBPR_AR, exp - 1); +} + +/* + * Location and size of BMan private memory + * + * Ideally we would use the DMA API to turn rmem->base into a DMA address + * (especially if iommu translations ever get involved). Unfortunately, the + * DMA API currently does not allow mapping anything that is not backed with + * a struct page. + */ +#ifndef __rtems__ +static dma_addr_t fbpr_a; +static size_t fbpr_sz; + +static int bman_fbpr(struct reserved_mem *rmem) +{ + fbpr_a = rmem->base; + fbpr_sz = rmem->size; + + WARN_ON(!(fbpr_a && fbpr_sz)); + + return 0; +} +RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr); +#else /* __rtems__ */ +static DPAA_NOCACHENOLOAD_ALIGNED_REGION(fbpr, 16777216); +#define fbpr_a ((uintptr_t)&fbpr[0]) +#define fbpr_sz sizeof(fbpr) +#endif /* __rtems__ */ + +static irqreturn_t bman_isr(int irq, void *ptr) +{ + u32 isr_val, ier_val, ecsr_val, isr_mask, i; + struct device *dev = ptr; + + ier_val = bm_ccsr_in(REG_ERR_IER); + isr_val = bm_ccsr_in(REG_ERR_ISR); + ecsr_val = bm_ccsr_in(REG_ECSR); + isr_mask = isr_val & ier_val; + + if (!isr_mask) + return IRQ_NONE; + + for (i = 0; i < ARRAY_SIZE(bman_hwerr_txts); i++) { + if (bman_hwerr_txts[i].mask & isr_mask) { +#ifndef __rtems__ + dev_err_ratelimited(dev, "ErrInt: %s\n", + bman_hwerr_txts[i].txt); +#endif /* __rtems__ */ + if (bman_hwerr_txts[i].mask & ecsr_val) { + /* Re-arm error capture registers */ + bm_ccsr_out(REG_ECSR, ecsr_val); + } + if (bman_hwerr_txts[i].mask & BMAN_ERRS_TO_DISABLE) { + dev_dbg(dev, "Disabling error 0x%x\n", + bman_hwerr_txts[i].mask); + ier_val &= ~bman_hwerr_txts[i].mask; + bm_ccsr_out(REG_ERR_IER, ier_val); + } + } + } + bm_ccsr_out(REG_ERR_ISR, isr_val); + + return IRQ_HANDLED; +} + +static int fsl_bman_probe(struct platform_device *pdev) +{ + int ret, err_irq; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; +#ifdef __rtems__ + struct resource res_storage; +#endif /* __rtems__ */ + struct resource *res; + u16 id, bm_pool_cnt; + u8 major, minor; + +#ifndef __rtems__ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); +#else /* __rtems__ */ + res = platform_get_resource(&res_storage, pdev, IORESOURCE_MEM, 0); +#endif /* __rtems__ */ + if (!res) { + dev_err(dev, "Can't get %s property 'IORESOURCE_MEM'\n", + node->full_name); + return -ENXIO; + } + bm_ccsr_start = devm_ioremap(dev, res->start, resource_size(res)); + if (!bm_ccsr_start) + return -ENXIO; + + bm_get_version(&id, &major, &minor); + if (major == 1 && minor == 0) { + bman_ip_rev = BMAN_REV10; + bm_pool_cnt = BM_POOL_MAX; + } else if (major == 2 && minor == 0) { + bman_ip_rev = BMAN_REV20; + bm_pool_cnt = 8; + } else if (major == 2 && minor == 1) { + bman_ip_rev = BMAN_REV21; + bm_pool_cnt = BM_POOL_MAX; + } else { + dev_err(dev, "Unknown Bman version:%04x,%02x,%02x\n", + id, major, minor); + return -ENODEV; + } + + bm_set_memory(fbpr_a, fbpr_sz); + + err_irq = platform_get_irq(pdev, 0); + if (err_irq <= 0) { + dev_info(dev, "Can't get %s IRQ\n", node->full_name); + return -ENODEV; + } + ret = devm_request_irq(dev, err_irq, bman_isr, IRQF_SHARED, "bman-err", + dev); + if (ret) { + dev_err(dev, "devm_request_irq() failed %d for '%s'\n", + ret, node->full_name); + return ret; + } + /* Disable Buffer Pool State Change */ + bm_ccsr_out(REG_ERR_ISDR, BM_EIRQ_BSCN); + /* + * Write-to-clear any stale bits, (eg. starvation being asserted prior + * to resource allocation during driver init). + */ + bm_ccsr_out(REG_ERR_ISR, 0xffffffff); + /* Enable Error Interrupts */ + bm_ccsr_out(REG_ERR_IER, 0xffffffff); + + bm_bpalloc = devm_gen_pool_create(dev, 0, -1, "bman-bpalloc"); + if (IS_ERR(bm_bpalloc)) { + ret = PTR_ERR(bm_bpalloc); + dev_err(dev, "bman-bpalloc pool init failed (%d)\n", ret); + return ret; + } + + /* seed BMan resource pool */ + ret = gen_pool_add(bm_bpalloc, DPAA_GENALLOC_OFF, bm_pool_cnt, -1); + if (ret) { + dev_err(dev, "Failed to seed BPID range [%d..%d] (%d)\n", + 0, bm_pool_cnt - 1, ret); + return ret; + } + + return 0; +}; + +#ifndef __rtems__ +static const struct of_device_id fsl_bman_ids[] = { + { + .compatible = "fsl,bman", + }, + {} +}; + +static struct platform_driver fsl_bman_driver = { + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = fsl_bman_ids, + .suppress_bind_attrs = true, + }, + .probe = fsl_bman_probe, +}; + +builtin_platform_driver(fsl_bman_driver); +#else /* __rtems__ */ +#include <sys/types.h> +#include <sys/kernel.h> +#include <rtems.h> +#include <bsp/fdt.h> +#include <bsp/qoriq.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +static struct bm_portal_config bman_configs[NR_CPUS]; + +u16 bman_pool_max; + +SYSINIT_REFERENCE(irqs); + +static void +bman_sysinit(void) +{ + const char *fdt = bsp_fdt_get(); + struct device_node dn; + struct platform_device ofdev = { + .dev = { + .of_node = &dn, + .base = (uintptr_t)&qoriq + } + }; + const char *name; + int cpu_count = (int)rtems_get_processor_count(); + int cpu; + int ret; + int node; + int parent; + + qoriq_reset_qman_and_bman(); + qoriq_clear_ce_portal(&qoriq_bman_portal[0][0], + sizeof(qoriq_bman_portal[0])); + qoriq_clear_ci_portal(&qoriq_bman_portal[1][0], + sizeof(qoriq_bman_portal[1])); + + memset(&dn, 0, sizeof(dn)); + + name = "fsl,bman"; + node = fdt_node_offset_by_compatible(fdt, 0, name); + if (node < 0) + panic("bman: no bman in FDT"); + + dn.full_name = name; + dn.offset = node; + ret = fsl_bman_probe(&ofdev); + if (ret != 0) + panic("bman: probe failed"); + + name = "fsl,bman-portal"; + node = fdt_node_offset_by_compatible(fdt, 0, name); + if (node < 0) + panic("bman: no portals in FDT"); + parent = fdt_parent_offset(fdt, node); + if (parent < 0) + panic("bman: no parent of portals in FDT"); + node = fdt_first_subnode(fdt, parent); + + dn.full_name = name; + dn.offset = node; + + for (cpu = 0; cpu < cpu_count; ++cpu) { + struct bm_portal_config *pcfg = &bman_configs[cpu]; + struct bman_portal *portal; + struct resource res; + + if (node < 0) + panic("bman: missing portal in FDT"); + + ret = of_address_to_resource(&dn, 0, &res); + if (ret != 0) + panic("bman: no portal CE address"); + pcfg->addr_virt[0] = (__iomem void *) + ((uintptr_t)&qoriq_bman_portal[0][0] + (uintptr_t)res.start); + BSD_ASSERT((uintptr_t)pcfg->addr_virt[0] >= + (uintptr_t)&qoriq_bman_portal[0][0]); + BSD_ASSERT((uintptr_t)pcfg->addr_virt[0] < + (uintptr_t)&qoriq_bman_portal[1][0]); + + ret = of_address_to_resource(&dn, 1, &res); + if (ret != 0) + panic("bman: no portal CI address"); + pcfg->addr_virt[1] = (__iomem void *) + ((uintptr_t)&qoriq_bman_portal[0][0] + (uintptr_t)res.start); + BSD_ASSERT((uintptr_t)pcfg->addr_virt[1] >= + (uintptr_t)&qoriq_bman_portal[1][0]); + BSD_ASSERT((uintptr_t)pcfg->addr_virt[1] < + (uintptr_t)&qoriq_bman_portal[2][0]); + + pcfg->irq = of_irq_to_resource(&dn, 0, NULL); + if (pcfg->irq == NO_IRQ) + panic("bman: no portal interrupt"); + + pcfg->cpu = cpu; + + portal = bman_create_affine_portal(pcfg); + if (portal == NULL) + panic("bman: cannot create portal"); + + bman_p_irqsource_add(portal, BM_PIRQ_RCRI); + + node = fdt_next_subnode(fdt, node); + dn.offset = node; + } +} +SYSINIT(bman, SI_SUB_CPU, SI_ORDER_FIRST, bman_sysinit, NULL); +#endif /* __rtems__ */ |