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243 lines
6.3 KiB
243 lines
6.3 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 "bman_priv.h" |
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static struct bman_portal *affine_bportals[NR_CPUS]; |
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static struct cpumask portal_cpus; |
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static int __bman_portals_probed; |
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/* protect bman global registers and global data shared among portals */ |
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static DEFINE_SPINLOCK(bman_lock); |
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static struct bman_portal *init_pcfg(struct bm_portal_config *pcfg) |
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{ |
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struct bman_portal *p = bman_create_affine_portal(pcfg); |
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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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bman_p_irqsource_add(p, BM_PIRQ_RCRI); |
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affine_bportals[pcfg->cpu] = p; |
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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 int bman_offline_cpu(unsigned int cpu) |
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{ |
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struct bman_portal *p = affine_bportals[cpu]; |
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const struct bm_portal_config *pcfg; |
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if (!p) |
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return 0; |
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pcfg = bman_get_bm_portal_config(p); |
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if (!pcfg) |
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return 0; |
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/* use 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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return 0; |
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} |
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static int bman_online_cpu(unsigned int cpu) |
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{ |
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struct bman_portal *p = affine_bportals[cpu]; |
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const struct bm_portal_config *pcfg; |
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if (!p) |
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return 0; |
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pcfg = bman_get_bm_portal_config(p); |
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if (!pcfg) |
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return 0; |
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irq_set_affinity(pcfg->irq, cpumask_of(cpu)); |
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return 0; |
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} |
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int bman_portals_probed(void) |
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{ |
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return __bman_portals_probed; |
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} |
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EXPORT_SYMBOL_GPL(bman_portals_probed); |
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static int bman_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 bm_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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err = bman_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 bman 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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__bman_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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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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spin_lock(&bman_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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__bman_portals_probed = 1; |
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/* unassigned portal, skip init */ |
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spin_unlock(&bman_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(&bman_lock); |
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pcfg->cpu = cpu; |
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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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bman_offline_cpu(cpu); |
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if (__bman_portals_probed == 1 && bman_requires_cleanup()) { |
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/* |
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* BMan wasn't reset prior to boot (Kexec for example) |
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* Empty all the buffer pools so they are in reset state |
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*/ |
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for (i = 0; i < BM_POOL_MAX; i++) { |
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err = bm_shutdown_pool(i); |
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if (err) { |
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dev_err(dev, "Failed to shutdown bpool %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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bman_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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__bman_portals_probed = -1; |
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return -ENXIO; |
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} |
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static const struct of_device_id bman_portal_ids[] = { |
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{ |
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.compatible = "fsl,bman-portal", |
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}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, bman_portal_ids); |
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static struct platform_driver bman_portal_driver = { |
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.driver = { |
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.name = KBUILD_MODNAME, |
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.of_match_table = bman_portal_ids, |
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}, |
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.probe = bman_portal_probe, |
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}; |
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static int __init bman_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/qbman_portal:online", |
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bman_online_cpu, bman_offline_cpu); |
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if (ret < 0) { |
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pr_err("bman: 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(bman_portal_driver, |
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bman_portal_driver_register, platform_driver_unregister);
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