/* 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(…); /* Register offsets */ #define REG_FBPR_FPC … #define REG_ECSR … #define REG_ECIR … #define REG_EADR … #define REG_EDATA(n) … #define REG_SBEC(n) … #define REG_IP_REV_1 … #define REG_IP_REV_2 … #define REG_FBPR_BARE … #define REG_FBPR_BAR … #define REG_FBPR_AR … #define REG_SRCIDR … #define REG_LIODNR … #define REG_ERR_ISR … #define REG_ERR_IER … #define REG_ERR_ISDR … /* Used by all error interrupt registers except 'inhibit' */ #define BM_EIRQ_IVCI … #define BM_EIRQ_FLWI … #define BM_EIRQ_MBEI … #define BM_EIRQ_SBEI … #define BM_EIRQ_BSCN … struct bman_hwerr_txt { … }; static const struct bman_hwerr_txt bman_hwerr_txts[] = …; /* Only trigger low water mark interrupt once only */ #define BMAN_ERRS_TO_DISABLE … /* Pointer to the start of the BMan's CCSR space */ static u32 __iomem *bm_ccsr_start; static inline u32 bm_ccsr_in(u32 offset) { … } static inline void bm_ccsr_out(u32 offset, u32 val) { … } static void bm_get_version(u16 *id, u8 *major, u8 *minor) { … } /* signal transactions for FBPRs with higher priority */ #define FBPR_AR_RPRIO_HI … /* Track if probe has occurred and if cleanup is required */ static int __bman_probed; static int __bman_requires_cleanup; static int bm_set_memory(u64 ba, u32 size) { … } /* * 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. */ static dma_addr_t fbpr_a; static size_t fbpr_sz; static irqreturn_t bman_isr(int irq, void *ptr) { … } int bman_is_probed(void) { … } EXPORT_SYMBOL_GPL(…); int bman_requires_cleanup(void) { … } void bman_done_cleanup(void) { … } 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; struct resource *res; u16 id, bm_pool_cnt; u8 major, minor; __bman_probed = -1; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n", node); 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; } ret = qbman_init_private_mem(dev, 0, "fsl,bman-fbpr", &fbpr_a, &fbpr_sz); if (ret) { dev_err(dev, "qbman_init_private_mem() failed 0x%x\n", ret); return -ENODEV; } dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz); bm_set_memory(fbpr_a, fbpr_sz); err_irq = platform_get_irq(pdev, 0); if (err_irq <= 0) { dev_info(dev, "Can't get %pOF IRQ\n", node); 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 '%pOF'\n", ret, node); 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; } __bman_probed = 1; return 0; }; static const struct of_device_id fsl_bman_ids[] = …; static struct platform_driver fsl_bman_driver = …; builtin_platform_driver(…) …;
Codebase Browser
linux