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390 lines
10 KiB
390 lines
10 KiB
/* Copyright 2008 - 2016 Freescale Semiconductor, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the name of Freescale Semiconductor nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* ALTERNATIVELY, this software may be distributed under the terms of the |
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* GNU General Public License ("GPL") as published by the Free Software |
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* Foundation, either version 2 of that License or (at your option) any |
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* later version. |
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* |
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* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "qman_priv.h" |
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struct qman_portal *qman_dma_portal; |
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EXPORT_SYMBOL(qman_dma_portal); |
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/* Enable portal interupts (as opposed to polling mode) */ |
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#define CONFIG_FSL_DPA_PIRQ_SLOW 1 |
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#define CONFIG_FSL_DPA_PIRQ_FAST 1 |
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static struct cpumask portal_cpus; |
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static int __qman_portals_probed; |
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/* protect qman global registers and global data shared among portals */ |
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static DEFINE_SPINLOCK(qman_lock); |
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static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu) |
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{ |
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#ifdef CONFIG_FSL_PAMU |
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struct device *dev = pcfg->dev; |
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int window_count = 1; |
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struct iommu_domain_geometry geom_attr; |
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struct pamu_stash_attribute stash_attr; |
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int ret; |
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pcfg->iommu_domain = iommu_domain_alloc(&platform_bus_type); |
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if (!pcfg->iommu_domain) { |
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dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__); |
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goto no_iommu; |
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} |
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geom_attr.aperture_start = 0; |
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geom_attr.aperture_end = |
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((dma_addr_t)1 << min(8 * sizeof(dma_addr_t), (size_t)36)) - 1; |
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geom_attr.force_aperture = true; |
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ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_GEOMETRY, |
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&geom_attr); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, |
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ret); |
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goto out_domain_free; |
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} |
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ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_WINDOWS, |
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&window_count); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, |
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ret); |
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goto out_domain_free; |
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} |
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stash_attr.cpu = cpu; |
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stash_attr.cache = PAMU_ATTR_CACHE_L1; |
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ret = iommu_domain_set_attr(pcfg->iommu_domain, |
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DOMAIN_ATTR_FSL_PAMU_STASH, |
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&stash_attr); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_domain_set_attr() = %d", |
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__func__, ret); |
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goto out_domain_free; |
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} |
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ret = iommu_domain_window_enable(pcfg->iommu_domain, 0, 0, 1ULL << 36, |
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IOMMU_READ | IOMMU_WRITE); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_domain_window_enable() = %d", |
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__func__, ret); |
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goto out_domain_free; |
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} |
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ret = iommu_attach_device(pcfg->iommu_domain, dev); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_device_attach() = %d", __func__, |
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ret); |
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goto out_domain_free; |
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} |
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ret = iommu_domain_set_attr(pcfg->iommu_domain, |
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DOMAIN_ATTR_FSL_PAMU_ENABLE, |
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&window_count); |
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if (ret < 0) { |
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dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, |
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ret); |
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goto out_detach_device; |
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} |
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no_iommu: |
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#endif |
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qman_set_sdest(pcfg->channel, cpu); |
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return; |
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#ifdef CONFIG_FSL_PAMU |
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out_detach_device: |
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iommu_detach_device(pcfg->iommu_domain, NULL); |
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out_domain_free: |
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iommu_domain_free(pcfg->iommu_domain); |
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pcfg->iommu_domain = NULL; |
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#endif |
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} |
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static struct qman_portal *init_pcfg(struct qm_portal_config *pcfg) |
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{ |
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struct qman_portal *p; |
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u32 irq_sources = 0; |
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/* We need the same LIODN offset for all portals */ |
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qman_liodn_fixup(pcfg->channel); |
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pcfg->iommu_domain = NULL; |
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portal_set_cpu(pcfg, pcfg->cpu); |
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p = qman_create_affine_portal(pcfg, NULL); |
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if (!p) { |
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dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n", |
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__func__, pcfg->cpu); |
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return NULL; |
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} |
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/* Determine what should be interrupt-vs-poll driven */ |
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#ifdef CONFIG_FSL_DPA_PIRQ_SLOW |
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irq_sources |= QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI | |
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QM_PIRQ_CSCI; |
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#endif |
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#ifdef CONFIG_FSL_DPA_PIRQ_FAST |
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irq_sources |= QM_PIRQ_DQRI; |
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#endif |
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qman_p_irqsource_add(p, irq_sources); |
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spin_lock(&qman_lock); |
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if (cpumask_equal(&portal_cpus, cpu_possible_mask)) { |
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/* all assigned portals are initialized now */ |
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qman_init_cgr_all(); |
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} |
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if (!qman_dma_portal) |
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qman_dma_portal = p; |
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spin_unlock(&qman_lock); |
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dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu); |
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return p; |
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} |
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static void qman_portal_update_sdest(const struct qm_portal_config *pcfg, |
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unsigned int cpu) |
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{ |
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#ifdef CONFIG_FSL_PAMU /* TODO */ |
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struct pamu_stash_attribute stash_attr; |
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int ret; |
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if (pcfg->iommu_domain) { |
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stash_attr.cpu = cpu; |
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stash_attr.cache = PAMU_ATTR_CACHE_L1; |
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ret = iommu_domain_set_attr(pcfg->iommu_domain, |
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DOMAIN_ATTR_FSL_PAMU_STASH, &stash_attr); |
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if (ret < 0) { |
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dev_err(pcfg->dev, |
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"Failed to update pamu stash setting\n"); |
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return; |
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} |
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} |
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#endif |
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qman_set_sdest(pcfg->channel, cpu); |
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} |
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static int qman_offline_cpu(unsigned int cpu) |
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{ |
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struct qman_portal *p; |
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const struct qm_portal_config *pcfg; |
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p = affine_portals[cpu]; |
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if (p) { |
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pcfg = qman_get_qm_portal_config(p); |
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if (pcfg) { |
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/* select any other online CPU */ |
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cpu = cpumask_any_but(cpu_online_mask, cpu); |
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irq_set_affinity(pcfg->irq, cpumask_of(cpu)); |
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qman_portal_update_sdest(pcfg, cpu); |
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} |
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} |
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return 0; |
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} |
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static int qman_online_cpu(unsigned int cpu) |
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{ |
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struct qman_portal *p; |
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const struct qm_portal_config *pcfg; |
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p = affine_portals[cpu]; |
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if (p) { |
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pcfg = qman_get_qm_portal_config(p); |
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if (pcfg) { |
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irq_set_affinity(pcfg->irq, cpumask_of(cpu)); |
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qman_portal_update_sdest(pcfg, cpu); |
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} |
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} |
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return 0; |
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} |
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int qman_portals_probed(void) |
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{ |
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return __qman_portals_probed; |
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} |
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EXPORT_SYMBOL_GPL(qman_portals_probed); |
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static int qman_portal_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct device_node *node = dev->of_node; |
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struct qm_portal_config *pcfg; |
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struct resource *addr_phys[2]; |
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int irq, cpu, err, i; |
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u32 val; |
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err = qman_is_probed(); |
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if (!err) |
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return -EPROBE_DEFER; |
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if (err < 0) { |
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dev_err(&pdev->dev, "failing probe due to qman probe error\n"); |
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return -ENODEV; |
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} |
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pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL); |
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if (!pcfg) { |
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__qman_portals_probed = -1; |
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return -ENOMEM; |
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} |
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pcfg->dev = dev; |
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addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM, |
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DPAA_PORTAL_CE); |
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if (!addr_phys[0]) { |
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dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node); |
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goto err_ioremap1; |
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} |
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addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM, |
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DPAA_PORTAL_CI); |
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if (!addr_phys[1]) { |
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dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node); |
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goto err_ioremap1; |
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} |
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err = of_property_read_u32(node, "cell-index", &val); |
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if (err) { |
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dev_err(dev, "Can't get %pOF property 'cell-index'\n", node); |
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__qman_portals_probed = -1; |
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return err; |
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} |
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pcfg->channel = val; |
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pcfg->cpu = -1; |
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irq = platform_get_irq(pdev, 0); |
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if (irq <= 0) |
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goto err_ioremap1; |
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pcfg->irq = irq; |
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pcfg->addr_virt_ce = memremap(addr_phys[0]->start, |
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resource_size(addr_phys[0]), |
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QBMAN_MEMREMAP_ATTR); |
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if (!pcfg->addr_virt_ce) { |
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dev_err(dev, "memremap::CE failed\n"); |
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goto err_ioremap1; |
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} |
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pcfg->addr_virt_ci = ioremap(addr_phys[1]->start, |
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resource_size(addr_phys[1])); |
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if (!pcfg->addr_virt_ci) { |
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dev_err(dev, "ioremap::CI failed\n"); |
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goto err_ioremap2; |
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} |
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pcfg->pools = qm_get_pools_sdqcr(); |
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spin_lock(&qman_lock); |
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cpu = cpumask_next_zero(-1, &portal_cpus); |
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if (cpu >= nr_cpu_ids) { |
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__qman_portals_probed = 1; |
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/* unassigned portal, skip init */ |
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spin_unlock(&qman_lock); |
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return 0; |
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} |
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cpumask_set_cpu(cpu, &portal_cpus); |
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spin_unlock(&qman_lock); |
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pcfg->cpu = cpu; |
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if (dma_set_mask(dev, DMA_BIT_MASK(40))) { |
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dev_err(dev, "dma_set_mask() failed\n"); |
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goto err_portal_init; |
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} |
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if (!init_pcfg(pcfg)) { |
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dev_err(dev, "portal init failed\n"); |
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goto err_portal_init; |
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} |
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/* clear irq affinity if assigned cpu is offline */ |
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if (!cpu_online(cpu)) |
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qman_offline_cpu(cpu); |
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if (__qman_portals_probed == 1 && qman_requires_cleanup()) { |
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/* |
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* QMan wasn't reset prior to boot (Kexec for example) |
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* Empty all the frame queues so they are in reset state |
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*/ |
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for (i = 0; i < qm_get_fqid_maxcnt(); i++) { |
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err = qman_shutdown_fq(i); |
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if (err) { |
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dev_err(dev, "Failed to shutdown frame queue %d\n", |
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i); |
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goto err_portal_init; |
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} |
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} |
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qman_done_cleanup(); |
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} |
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return 0; |
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err_portal_init: |
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iounmap(pcfg->addr_virt_ci); |
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err_ioremap2: |
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memunmap(pcfg->addr_virt_ce); |
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err_ioremap1: |
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__qman_portals_probed = -1; |
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return -ENXIO; |
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} |
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static const struct of_device_id qman_portal_ids[] = { |
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{ |
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.compatible = "fsl,qman-portal", |
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}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, qman_portal_ids); |
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static struct platform_driver qman_portal_driver = { |
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.driver = { |
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.name = KBUILD_MODNAME, |
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.of_match_table = qman_portal_ids, |
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}, |
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.probe = qman_portal_probe, |
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}; |
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static int __init qman_portal_driver_register(struct platform_driver *drv) |
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{ |
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int ret; |
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ret = platform_driver_register(drv); |
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if (ret < 0) |
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return ret; |
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ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, |
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"soc/qman_portal:online", |
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qman_online_cpu, qman_offline_cpu); |
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if (ret < 0) { |
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pr_err("qman: failed to register hotplug callbacks.\n"); |
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platform_driver_unregister(drv); |
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return ret; |
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} |
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return 0; |
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} |
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module_driver(qman_portal_driver, |
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qman_portal_driver_register, platform_driver_unregister);
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