Author: mw Date: Thu Oct 31 15:38:17 2019 New Revision: 354218 URL: https://svnweb.freebsd.org/changeset/base/354218
Log: Add WC support for arm64 in the ENA driver As the pmamp_change_attr() is public on arm64 since r351131, it can be used on the arm64 to map memory range as with the write combined attribute. It requires the driver to use generic VM_MEMATTR_WRITE_COMBINING flag instead of the x86 specific PAT_WRITE_COMBINING. Differential Revision: https://reviews.freebsd.org/D21931 Submitted by: Michal Krawczyk <m...@semihalf.com> Obtained from: Semihalf Sponsored by: Amazon, Inc. Modified: head/sys/dev/ena/ena.c Modified: head/sys/dev/ena/ena.c ============================================================================== --- head/sys/dev/ena/ena.c Thu Oct 31 15:16:10 2019 (r354217) +++ head/sys/dev/ena/ena.c Thu Oct 31 15:38:17 2019 (r354218) @@ -3309,7 +3309,7 @@ ena_calc_io_queue_num(struct ena_adapter *adapter, static int ena_enable_wc(struct resource *res) { -#if defined(__i386) || defined(__amd64) +#if defined(__i386) || defined(__amd64) || defined(__aarch64__) vm_offset_t va; vm_size_t len; int rc; @@ -3317,7 +3317,7 @@ ena_enable_wc(struct resource *res) va = (vm_offset_t)rman_get_virtual(res); len = rman_get_size(res); /* Enable write combining */ - rc = pmap_change_attr(va, len, PAT_WRITE_COMBINING); + rc = pmap_change_attr(va, len, VM_MEMATTR_WRITE_COMBINING); if (unlikely(rc != 0)) { ena_trace(ENA_ALERT, "pmap_change_attr failed, %d\n", rc); return (rc); @@ -4352,14 +4352,6 @@ ena_attach(device_t pdev) set_default_llq_configurations(&llq_config); -#if defined(__arm__) || defined(__aarch64__) - /* - * Force LLQ disable, as the driver is not supporting WC enablement - * on the ARM architecture. Using LLQ without WC would affect - * performance in a negative way. - */ - ena_dev->supported_features &= ~(1 << ENA_ADMIN_LLQ); -#endif rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx.llq, &llq_config); if (unlikely(rc != 0)) { _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
