Loading Documentation/devicetree/bindings/platform/msm/ipa.txt +4 −0 Original line number Diff line number Diff line Loading @@ -122,6 +122,10 @@ Optional properties: controller phandle and "clk_ipa_clk" as macro for "iface_clk" - clock-names: This property shall contain the clock input names used by driver in same order as the clocks property.This should be "iface_clk" - emulator-bar0-offset: Specifies the offset, within PCIe BAR0, where IPA/GSI programmable registers reside. This property is used only with the IPA/GSI emulation system, which is connected to and communicated with via PCIe. IPA SMMU sub nodes Loading drivers/platform/msm/Kconfig +6 −0 Original line number Diff line number Diff line Loading @@ -166,4 +166,10 @@ config SEEMP_CORE a log and rates the actions according to whether a typical user would use the tools. config IPA_EMULATION bool "IPA on X86 Linux (IPA emulation support)" depends on X86 && IPA3 help This option is used only when building the X86 version of the IPA/GSI driver. Never set this when building for ARM. endmenu drivers/platform/msm/gsi/Makefile +2 −0 Original line number Diff line number Diff line gsidbg-$(CONFIG_DEBUG_FS) += gsi_dbg.o obj-$(CONFIG_GSI) += gsi.o gsidbg.o obj-$(CONFIG_IPA_EMULATION) += gsi_emulation.o drivers/platform/msm/gsi/gsi.c +150 −9 Original line number Diff line number Diff line Loading @@ -20,6 +20,7 @@ #include <linux/delay.h> #include "gsi.h" #include "gsi_reg.h" #include "gsi_emulation.h" #define GSI_CMD_TIMEOUT (5*HZ) #define GSI_STOP_CMD_TIMEOUT_MS 50 Loading @@ -42,6 +43,13 @@ static const struct of_device_id msm_gsi_match[] = { { }, }; #if defined(CONFIG_IPA_EMULATION) static bool running_emulation = true; #else static bool running_emulation; #endif struct gsi_ctx *gsi_ctx; static void __gsi_config_type_irq(int ee, uint32_t mask, uint32_t val) Loading Loading @@ -624,7 +632,7 @@ static void gsi_handle_irq(void) if (!type) break; GSIDBG_LOW("type %x\n", type); GSIDBG_LOW("type 0x%x\n", type); if (type & GSI_EE_n_CNTXT_TYPE_IRQ_CH_CTRL_BMSK) gsi_handle_ch_ctrl(ee); Loading Loading @@ -859,17 +867,57 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) GSIERR("bad irq specified %u\n", props->irq); return -GSI_STATUS_INVALID_PARAMS; } /* * On a real UE, there are two separate interrupt * vectors that get directed toward the GSI/IPA * drivers. They are handled by gsi_isr() and * (ipa_isr() or ipa3_isr()) respectively. In the * emulation environment, this is not the case; * instead, interrupt vectors are routed to the * emualation hardware's interrupt controller, which * in turn, forwards a single interrupt to the GSI/IPA * driver. When the new interrupt vector is received, * the driver needs to probe the interrupt * controller's registers so see if one, the other, or * both interrupts have occurred. Given the above, we * now need to handle both situations, namely: the * emulator's and the real UE. */ if (running_emulation) { /* * New scheme involving the emulator's * interrupt controller. */ res = devm_request_threaded_irq( gsi_ctx->dev, props->irq, /* top half handler to follow */ emulator_hard_irq_isr, /* threaded bottom half handler to follow */ emulator_soft_irq_isr, IRQF_SHARED, "emulator_intcntrlr", gsi_ctx); } else { /* * Traditional scheme used on the real UE. */ res = devm_request_irq(gsi_ctx->dev, props->irq, gsi_isr, props->req_clk_cb ? IRQF_TRIGGER_RISING : IRQF_TRIGGER_HIGH, "gsi", gsi_ctx); } if (res) { GSIERR("failed to register isr for %u\n", props->irq); GSIERR( "failed to register isr for %u\n", props->irq); return -GSI_STATUS_ERROR; } GSIDBG( "succeeded to register isr for %u\n", props->irq); res = enable_irq_wake(props->irq); if (res) Loading @@ -889,6 +937,41 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) return -GSI_STATUS_RES_ALLOC_FAILURE; } GSIDBG("GSI base(%pa) mapped to (%pK) with len (0x%lx)\n", &(props->phys_addr), gsi_ctx->base, props->size); if (running_emulation) { GSIDBG("GSI SW ver register value 0x%x\n", gsi_readl(gsi_ctx->base + GSI_EE_n_GSI_SW_VERSION_OFFS(0))); gsi_ctx->intcntrlr_mem_size = props->emulator_intcntrlr_size; gsi_ctx->intcntrlr_base = devm_ioremap_nocache( gsi_ctx->dev, props->emulator_intcntrlr_addr, props->emulator_intcntrlr_size); if (!gsi_ctx->intcntrlr_base) { GSIERR( "failed to remap emulator's interrupt controller HW\n"); devm_iounmap(gsi_ctx->dev, gsi_ctx->base); devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); return -GSI_STATUS_RES_ALLOC_FAILURE; } GSIDBG( "Emulator's interrupt controller base(%pa) mapped to (%pK) with len (0x%lx)\n", &(props->emulator_intcntrlr_addr), gsi_ctx->intcntrlr_base, props->emulator_intcntrlr_size); gsi_ctx->intcntrlr_gsi_isr = gsi_isr; gsi_ctx->intcntrlr_client_isr = props->emulator_intcntrlr_client_isr; } gsi_ctx->per = *props; gsi_ctx->per_registered = true; mutex_init(&gsi_ctx->mlock); Loading @@ -896,11 +979,21 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) atomic_set(&gsi_ctx->num_evt_ring, 0); gsi_ctx->max_ch = gsi_get_max_channels(gsi_ctx->per.ver); if (gsi_ctx->max_ch == 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("failed to get max channels\n"); return -GSI_STATUS_ERROR; } gsi_ctx->max_ev = gsi_get_max_event_rings(gsi_ctx->per.ver); if (gsi_ctx->max_ev == 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("failed to get max event rings\n"); return -GSI_STATUS_ERROR; } Loading @@ -913,7 +1006,9 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) if (props->mhi_er_id_limits_valid && props->mhi_er_id_limits[0] > (gsi_ctx->max_ev - 1)) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); gsi_ctx->base = NULL; if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("MHI event ring start id %u is beyond max %u\n", props->mhi_er_id_limits[0], gsi_ctx->max_ev); Loading Loading @@ -954,6 +1049,22 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) gsi_writel(0, gsi_ctx->base + GSI_EE_n_ERROR_LOG_OFFS(gsi_ctx->per.ee)); if (running_emulation) { /* * Set up the emulator's interrupt controller... */ res = setup_emulator_cntrlr( gsi_ctx->intcntrlr_base, gsi_ctx->intcntrlr_mem_size); if (res != 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("setup_emulator_cntrlr() failed\n"); return res; } } *dev_hdl = (uintptr_t)gsi_ctx; return GSI_STATUS_SUCCESS; Loading Loading @@ -3103,7 +3214,8 @@ static void gsi_configure_ieps(void *base, enum gsi_ver ver) static void gsi_configure_bck_prs_matrix(void *base) { void __iomem *gsi_base = base; void __iomem *gsi_base = (void __iomem *) base; /* * For now, these are default values. In the future, GSI FW image will * produce optimized back-pressure values based on the FW image. Loading Loading @@ -3372,16 +3484,45 @@ static struct platform_driver msm_gsi_driver = { }, }; static struct platform_device *pdev; /** * Module Init. */ static int __init gsi_init(void) { pr_debug("%s\n", __func__); return platform_driver_register(&msm_gsi_driver); int ret; pr_debug("gsi_init\n"); ret = platform_driver_register(&msm_gsi_driver); if (ret < 0) goto out; if (running_emulation) { pdev = platform_device_register_simple("gsi", -1, NULL, 0); if (IS_ERR(pdev)) { ret = PTR_ERR(pdev); platform_driver_unregister(&msm_gsi_driver); goto out; } } out: return ret; } arch_initcall(gsi_init); /* * Module exit. */ static void __exit gsi_exit(void) { if (running_emulation && pdev) platform_device_unregister(pdev); platform_driver_unregister(&msm_gsi_driver); } module_exit(gsi_exit); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Generic Software Interface (GSI)"); drivers/platform/msm/gsi/gsi.h +15 −0 Original line number Diff line number Diff line Loading @@ -18,8 +18,16 @@ #include <linux/mutex.h> #include <linux/spinlock.h> #include <linux/msm_gsi.h> #include <linux/errno.h> #include <linux/ipc_logging.h> /* * The following for adding code (ie. for EMULATION) not found on x86. */ #if defined(CONFIG_IPA_EMULATION) # include "gsi_emulation_stubs.h" #endif #define GSI_CHAN_MAX 31 #define GSI_EVT_RING_MAX 24 #define GSI_NO_EVT_ERINDEX 31 Loading Loading @@ -204,6 +212,13 @@ struct gsi_ctx { struct completion gen_ee_cmd_compl; void *ipc_logbuf; void *ipc_logbuf_low; /* * The following used only on emulation systems. */ void __iomem *intcntrlr_base; u32 intcntrlr_mem_size; irq_handler_t intcntrlr_gsi_isr; irq_handler_t intcntrlr_client_isr; }; enum gsi_re_type { Loading Loading
Documentation/devicetree/bindings/platform/msm/ipa.txt +4 −0 Original line number Diff line number Diff line Loading @@ -122,6 +122,10 @@ Optional properties: controller phandle and "clk_ipa_clk" as macro for "iface_clk" - clock-names: This property shall contain the clock input names used by driver in same order as the clocks property.This should be "iface_clk" - emulator-bar0-offset: Specifies the offset, within PCIe BAR0, where IPA/GSI programmable registers reside. This property is used only with the IPA/GSI emulation system, which is connected to and communicated with via PCIe. IPA SMMU sub nodes Loading
drivers/platform/msm/Kconfig +6 −0 Original line number Diff line number Diff line Loading @@ -166,4 +166,10 @@ config SEEMP_CORE a log and rates the actions according to whether a typical user would use the tools. config IPA_EMULATION bool "IPA on X86 Linux (IPA emulation support)" depends on X86 && IPA3 help This option is used only when building the X86 version of the IPA/GSI driver. Never set this when building for ARM. endmenu
drivers/platform/msm/gsi/Makefile +2 −0 Original line number Diff line number Diff line gsidbg-$(CONFIG_DEBUG_FS) += gsi_dbg.o obj-$(CONFIG_GSI) += gsi.o gsidbg.o obj-$(CONFIG_IPA_EMULATION) += gsi_emulation.o
drivers/platform/msm/gsi/gsi.c +150 −9 Original line number Diff line number Diff line Loading @@ -20,6 +20,7 @@ #include <linux/delay.h> #include "gsi.h" #include "gsi_reg.h" #include "gsi_emulation.h" #define GSI_CMD_TIMEOUT (5*HZ) #define GSI_STOP_CMD_TIMEOUT_MS 50 Loading @@ -42,6 +43,13 @@ static const struct of_device_id msm_gsi_match[] = { { }, }; #if defined(CONFIG_IPA_EMULATION) static bool running_emulation = true; #else static bool running_emulation; #endif struct gsi_ctx *gsi_ctx; static void __gsi_config_type_irq(int ee, uint32_t mask, uint32_t val) Loading Loading @@ -624,7 +632,7 @@ static void gsi_handle_irq(void) if (!type) break; GSIDBG_LOW("type %x\n", type); GSIDBG_LOW("type 0x%x\n", type); if (type & GSI_EE_n_CNTXT_TYPE_IRQ_CH_CTRL_BMSK) gsi_handle_ch_ctrl(ee); Loading Loading @@ -859,17 +867,57 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) GSIERR("bad irq specified %u\n", props->irq); return -GSI_STATUS_INVALID_PARAMS; } /* * On a real UE, there are two separate interrupt * vectors that get directed toward the GSI/IPA * drivers. They are handled by gsi_isr() and * (ipa_isr() or ipa3_isr()) respectively. In the * emulation environment, this is not the case; * instead, interrupt vectors are routed to the * emualation hardware's interrupt controller, which * in turn, forwards a single interrupt to the GSI/IPA * driver. When the new interrupt vector is received, * the driver needs to probe the interrupt * controller's registers so see if one, the other, or * both interrupts have occurred. Given the above, we * now need to handle both situations, namely: the * emulator's and the real UE. */ if (running_emulation) { /* * New scheme involving the emulator's * interrupt controller. */ res = devm_request_threaded_irq( gsi_ctx->dev, props->irq, /* top half handler to follow */ emulator_hard_irq_isr, /* threaded bottom half handler to follow */ emulator_soft_irq_isr, IRQF_SHARED, "emulator_intcntrlr", gsi_ctx); } else { /* * Traditional scheme used on the real UE. */ res = devm_request_irq(gsi_ctx->dev, props->irq, gsi_isr, props->req_clk_cb ? IRQF_TRIGGER_RISING : IRQF_TRIGGER_HIGH, "gsi", gsi_ctx); } if (res) { GSIERR("failed to register isr for %u\n", props->irq); GSIERR( "failed to register isr for %u\n", props->irq); return -GSI_STATUS_ERROR; } GSIDBG( "succeeded to register isr for %u\n", props->irq); res = enable_irq_wake(props->irq); if (res) Loading @@ -889,6 +937,41 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) return -GSI_STATUS_RES_ALLOC_FAILURE; } GSIDBG("GSI base(%pa) mapped to (%pK) with len (0x%lx)\n", &(props->phys_addr), gsi_ctx->base, props->size); if (running_emulation) { GSIDBG("GSI SW ver register value 0x%x\n", gsi_readl(gsi_ctx->base + GSI_EE_n_GSI_SW_VERSION_OFFS(0))); gsi_ctx->intcntrlr_mem_size = props->emulator_intcntrlr_size; gsi_ctx->intcntrlr_base = devm_ioremap_nocache( gsi_ctx->dev, props->emulator_intcntrlr_addr, props->emulator_intcntrlr_size); if (!gsi_ctx->intcntrlr_base) { GSIERR( "failed to remap emulator's interrupt controller HW\n"); devm_iounmap(gsi_ctx->dev, gsi_ctx->base); devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); return -GSI_STATUS_RES_ALLOC_FAILURE; } GSIDBG( "Emulator's interrupt controller base(%pa) mapped to (%pK) with len (0x%lx)\n", &(props->emulator_intcntrlr_addr), gsi_ctx->intcntrlr_base, props->emulator_intcntrlr_size); gsi_ctx->intcntrlr_gsi_isr = gsi_isr; gsi_ctx->intcntrlr_client_isr = props->emulator_intcntrlr_client_isr; } gsi_ctx->per = *props; gsi_ctx->per_registered = true; mutex_init(&gsi_ctx->mlock); Loading @@ -896,11 +979,21 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) atomic_set(&gsi_ctx->num_evt_ring, 0); gsi_ctx->max_ch = gsi_get_max_channels(gsi_ctx->per.ver); if (gsi_ctx->max_ch == 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("failed to get max channels\n"); return -GSI_STATUS_ERROR; } gsi_ctx->max_ev = gsi_get_max_event_rings(gsi_ctx->per.ver); if (gsi_ctx->max_ev == 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("failed to get max event rings\n"); return -GSI_STATUS_ERROR; } Loading @@ -913,7 +1006,9 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) if (props->mhi_er_id_limits_valid && props->mhi_er_id_limits[0] > (gsi_ctx->max_ev - 1)) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); gsi_ctx->base = NULL; if (running_emulation) devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("MHI event ring start id %u is beyond max %u\n", props->mhi_er_id_limits[0], gsi_ctx->max_ev); Loading Loading @@ -954,6 +1049,22 @@ int gsi_register_device(struct gsi_per_props *props, unsigned long *dev_hdl) gsi_writel(0, gsi_ctx->base + GSI_EE_n_ERROR_LOG_OFFS(gsi_ctx->per.ee)); if (running_emulation) { /* * Set up the emulator's interrupt controller... */ res = setup_emulator_cntrlr( gsi_ctx->intcntrlr_base, gsi_ctx->intcntrlr_mem_size); if (res != 0) { devm_iounmap(gsi_ctx->dev, gsi_ctx->base); devm_iounmap(gsi_ctx->dev, gsi_ctx->intcntrlr_base); gsi_ctx->base = gsi_ctx->intcntrlr_base = NULL; devm_free_irq(gsi_ctx->dev, props->irq, gsi_ctx); GSIERR("setup_emulator_cntrlr() failed\n"); return res; } } *dev_hdl = (uintptr_t)gsi_ctx; return GSI_STATUS_SUCCESS; Loading Loading @@ -3103,7 +3214,8 @@ static void gsi_configure_ieps(void *base, enum gsi_ver ver) static void gsi_configure_bck_prs_matrix(void *base) { void __iomem *gsi_base = base; void __iomem *gsi_base = (void __iomem *) base; /* * For now, these are default values. In the future, GSI FW image will * produce optimized back-pressure values based on the FW image. Loading Loading @@ -3372,16 +3484,45 @@ static struct platform_driver msm_gsi_driver = { }, }; static struct platform_device *pdev; /** * Module Init. */ static int __init gsi_init(void) { pr_debug("%s\n", __func__); return platform_driver_register(&msm_gsi_driver); int ret; pr_debug("gsi_init\n"); ret = platform_driver_register(&msm_gsi_driver); if (ret < 0) goto out; if (running_emulation) { pdev = platform_device_register_simple("gsi", -1, NULL, 0); if (IS_ERR(pdev)) { ret = PTR_ERR(pdev); platform_driver_unregister(&msm_gsi_driver); goto out; } } out: return ret; } arch_initcall(gsi_init); /* * Module exit. */ static void __exit gsi_exit(void) { if (running_emulation && pdev) platform_device_unregister(pdev); platform_driver_unregister(&msm_gsi_driver); } module_exit(gsi_exit); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Generic Software Interface (GSI)");
drivers/platform/msm/gsi/gsi.h +15 −0 Original line number Diff line number Diff line Loading @@ -18,8 +18,16 @@ #include <linux/mutex.h> #include <linux/spinlock.h> #include <linux/msm_gsi.h> #include <linux/errno.h> #include <linux/ipc_logging.h> /* * The following for adding code (ie. for EMULATION) not found on x86. */ #if defined(CONFIG_IPA_EMULATION) # include "gsi_emulation_stubs.h" #endif #define GSI_CHAN_MAX 31 #define GSI_EVT_RING_MAX 24 #define GSI_NO_EVT_ERINDEX 31 Loading Loading @@ -204,6 +212,13 @@ struct gsi_ctx { struct completion gen_ee_cmd_compl; void *ipc_logbuf; void *ipc_logbuf_low; /* * The following used only on emulation systems. */ void __iomem *intcntrlr_base; u32 intcntrlr_mem_size; irq_handler_t intcntrlr_gsi_isr; irq_handler_t intcntrlr_client_isr; }; enum gsi_re_type { Loading
