diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0447-staging-vc04_services-Use-correct-cache-line-size.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0447-staging-vc04_services-Use-correct-cache-line-size.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0447-staging-vc04_services-Use-correct-cache-line-size.patch b/target/linux/bcm27xx/patches-4.19/950-0447-staging-vc04_services-Use-correct-cache-line-size.patch new file mode 100644 index 0000000000..c6b0606087 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0447-staging-vc04_services-Use-correct-cache-line-size.patch @@ -0,0 +1,135 @@ +From 63079fbe20c954140f8eb61f858b0774890f301c Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 17 Sep 2018 09:22:21 +0100 +Subject: [PATCH] staging/vc04_services: Use correct cache line size + +Use the compatible string in the DTB to select the correct cache line +size for the SoC - 32 for BCM2835, and 64 for BCM2836 and BCM2837. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +Tested-by: Stefan Wahren <stefan.wahren@i2se.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + .../interface/vchiq_arm/vchiq_2835_arm.c | 15 ++------ + .../interface/vchiq_arm/vchiq_arm.c | 35 +++++++++++++------ + .../interface/vchiq_arm/vchiq_arm.h | 5 +++ + 3 files changed, 33 insertions(+), 22 deletions(-) + +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +@@ -117,7 +117,8 @@ free_pagelist(struct vchiq_pagelist_info + int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state) + { + struct device *dev = &pdev->dev; +- struct rpi_firmware *fw = platform_get_drvdata(pdev); ++ struct vchiq_drvdata *drvdata = platform_get_drvdata(pdev); ++ struct rpi_firmware *fw = drvdata->fw; + VCHIQ_SLOT_ZERO_T *vchiq_slot_zero; + struct resource *res; + void *slot_mem; +@@ -135,17 +136,7 @@ int vchiq_platform_init(struct platform_ + if (err < 0) + return err; + +- /* +- * The tempting L1_CACHE_BYTES macro doesn't work in the case of +- * a kernel built with bcm2835_defconfig running on a BCM2836/7 +- * processor, hence the need for a runtime check. The dcache line size +- * is encoded in one of the coprocessor registers, but there is no +- * convenient way to access it short of embedded assembler, hence +- * the use of read_cpuid_id(). The following test evaluates to true +- * on a BCM2835 showing that it is ARMv6-ish, whereas +- * cpu_architecture() will indicate that it is an ARMv7. +- */ +- g_cache_line_size = ((read_cpuid_id() & 0x7f000) == 0x7b000) ? 32 : 64; ++ g_cache_line_size = drvdata->cache_line_size; + g_fragments_size = 2 * g_cache_line_size; + + /* Allocate space for the channels in coherent memory */ +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +@@ -173,6 +173,14 @@ static struct platform_device *bcm2835_c + static struct platform_device *bcm2835_codec; + static struct platform_device *vcsm_cma; + ++static struct vchiq_drvdata bcm2835_drvdata = { ++ .cache_line_size = 32, ++}; ++ ++static struct vchiq_drvdata bcm2836_drvdata = { ++ .cache_line_size = 64, ++}; ++ + static const char *const ioctl_names[] = { + "CONNECT", + "SHUTDOWN", +@@ -3607,12 +3615,25 @@ vchiq_register_child(struct platform_dev + return new_dev; + } + ++static const struct of_device_id vchiq_of_match[] = { ++ { .compatible = "brcm,bcm2835-vchiq", .data = &bcm2835_drvdata }, ++ { .compatible = "brcm,bcm2836-vchiq", .data = &bcm2836_drvdata }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, vchiq_of_match); ++ + static int vchiq_probe(struct platform_device *pdev) + { + struct device_node *fw_node; +- struct rpi_firmware *fw; ++ const struct of_device_id *of_id; ++ struct vchiq_drvdata *drvdata; + int err; + ++ of_id = of_match_node(vchiq_of_match, pdev->dev.of_node); ++ drvdata = (struct vchiq_drvdata *)of_id->data; ++ if (!drvdata) ++ return -EINVAL; ++ + fw_node = of_find_compatible_node(NULL, NULL, + "raspberrypi,bcm2835-firmware"); + if (!fw_node) { +@@ -3620,12 +3641,12 @@ static int vchiq_probe(struct platform_d + return -ENOENT; + } + +- fw = rpi_firmware_get(fw_node); ++ drvdata->fw = rpi_firmware_get(fw_node); + of_node_put(fw_node); +- if (!fw) ++ if (!drvdata->fw) + return -EPROBE_DEFER; + +- platform_set_drvdata(pdev, fw); ++ platform_set_drvdata(pdev, drvdata); + + err = vchiq_platform_init(pdev, &g_state); + if (err != 0) +@@ -3703,12 +3724,6 @@ static int vchiq_remove(struct platform_ + return 0; + } + +-static const struct of_device_id vchiq_of_match[] = { +- { .compatible = "brcm,bcm2835-vchiq", }, +- {}, +-}; +-MODULE_DEVICE_TABLE(of, vchiq_of_match); +- + static struct platform_driver vchiq_driver = { + .driver = { + .name = "bcm2835_vchiq", +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h +@@ -123,6 +123,11 @@ typedef struct vchiq_arm_state_struct { + + } VCHIQ_ARM_STATE_T; + ++struct vchiq_drvdata { ++ const unsigned int cache_line_size; ++ struct rpi_firmware *fw; ++}; ++ + extern int vchiq_arm_log_level; + extern int vchiq_susp_log_level; + |