Added a new remoteproc platform device for DA8XX. Contains CMA-based
reservation of physical memory block. A new kernel command-line
parameter has been added to allow boot-time specification of the
physical memory block.
diff --git a/Documentation/kernel-parameters.txt
b/Documentation/kernel-parameters.txt
index 363e348..f7ba70f3 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -44,6 +44,7 @@ parameter is applicable:
AVR32 AVR32 architecture is enabled.
AX25 Appropriate AX.25 support is enabled.
BLACKFIN Blackfin architecture is enabled.
+ CMA Contiguous Memory Area support is enabled.
DRM Direct Rendering Management support is enabled.
DYNAMIC_DEBUG Build in debug messages and enable them at runtime
EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
@@ -2634,6 +2635,11 @@ bytes respectively. Such letter suffixes can also be
entirely omitted.
Useful for devices that are detected asynchronously
(e.g. USB and MMC devices).
+ rproc_mem=nn[KMG][@address]
+ [KNL,ARM,CMA] Remoteproc physical memory block.
+ Memory area to be used by remote processor image,
+ managed by CMA.
+
rw [KNL] Mount root device read-write on boot
S [KNL] Run init in single mode
diff --git a/arch/arm/mach-davinci/devices-da8xx.c
b/arch/arm/mach-davinci/devices-da8xx.c
index fb2f51b..a455e5c 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -12,7 +12,7 @@
*/
#include <linux/init.h>
#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-contiguous.h>
#include <linux/serial_8250.h>
#include <linux/ahci_platform.h>
#include <linux/clk.h>
@@ -706,6 +706,96 @@ int __init da850_register_mmcsd1(struct davinci_mmc_config
*config)
}
#endif
+static struct resource da8xx_rproc_resources[] = {
+ { /* DSP boot address */
+ .start = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG,
+ .end = DA8XX_SYSCFG0_BASE + DA8XX_HOST1CFG_REG + 3,
+ .flags = IORESOURCE_MEM,
+ },
+ { /* DSP interrupt registers */
+ .start = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG,
+ .end = DA8XX_SYSCFG0_BASE + DA8XX_CHIPSIG_REG + 7,
+ .flags = IORESOURCE_MEM,
+ },
+ { /* dsp irq */
+ .start = IRQ_DA8XX_CHIPINT0,
+ .end = IRQ_DA8XX_CHIPINT0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device da8xx_dsp = {
+ .name = "davinci-rproc",
+ .id = 0,
+ .dev = {
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ },
+ .num_resources = ARRAY_SIZE(da8xx_rproc_resources),
+ .resource = da8xx_rproc_resources,
+};
+
+#if IS_ENABLED(CONFIG_DA8XX_REMOTEPROC)
+
+static phys_addr_t rproc_base __initdata;
+static unsigned long rproc_size __initdata;
+
+static int __init early_rproc_mem(char *p)
+{
+ char *endp;
+
+ if (p == NULL)
+ return 0;
+
+ rproc_size = memparse(p, &endp);
+ if (*endp == '@')
+ rproc_base = memparse(endp + 1, NULL);
+
+ return 0;
+}
+early_param("rproc_mem", early_rproc_mem);
+
+void __init da8xx_rproc_reserve_cma(void)
+{
+ int ret;
+
+ if (!rproc_base || !rproc_size) {
+ pr_err("%s: 'rproc_mem=nn@address' badly specified\n"
+ " 'nn' and 'address' must both be non-zero\n",
+ __func__);
+
+ return;
+ }
+
+ pr_info("%s: reserving 0x%lx @ 0x%lx...\n",
+ __func__, rproc_size, (unsigned long)rproc_base);
+
+ ret = dma_declare_contiguous(&da8xx_dsp.dev, rproc_size, rproc_base, 0);
+ if (ret)
+ pr_err("%s: dma_declare_contiguous failed %d\n", __func__, ret);
+}
+
+#else
+
+void __init da8xx_rproc_reserve_cma(void)
+{
+}
+
+#endif
+
+int __init da8xx_register_rproc(void)
+{
+ int ret;
+
+ ret = platform_device_register(&da8xx_dsp);
+ if (ret) {
+ pr_err("%s: platform_device_register: %d\n", __func__, ret);
+
+ return ret;
+ }
+
+ return 0;
+};
+
static struct resource da8xx_rtc_resources[] = {
{
.start = DA8XX_RTC_BASE,
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h
b/arch/arm/mach-davinci/include/mach/da8xx.h
index 700d311..1fcb106 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -54,6 +54,8 @@ extern unsigned int da850_max_speed;
#define DA8XX_SYSCFG0_BASE (IO_PHYS + 0x14000)
#define DA8XX_SYSCFG0_VIRT(x) (da8xx_syscfg0_base + (x))
#define DA8XX_JTAG_ID_REG 0x18
+#define DA8XX_HOST1CFG_REG 0x44
+#define DA8XX_CHIPSIG_REG 0x174
#define DA8XX_CFGCHIP0_REG 0x17c
#define DA8XX_CFGCHIP2_REG 0x184
#define DA8XX_CFGCHIP3_REG 0x188
@@ -105,6 +107,9 @@ int __init da850_register_vpif_display
int __init da850_register_vpif_capture
(struct vpif_capture_config *capture_config);
void da8xx_restart(char mode, const char *cmd);
+void da8xx_rproc_reserve_cma(void);
+int da8xx_register_rproc(void);
+
extern struct platform_device da8xx_serial_device;
extern struct emac_platform_data da8xx_emac_pdata;
--
1.7.9.4
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