powerpc/cell: Remove support for IBM Cell Blades

IBM Cell Blades used the Cell processor and the "blade" server form
factor. They were sold as models QS20, QS21 & QS22 from roughly 2006 to
2012 [1]. They were used in a few supercomputers (eg. Roadrunner) that
have since been dismantled, and were not that widely used otherwise.

Until recently I still had a working QS22, which meant I was able to
keep the platform support working, but unfortunately that machine has
now died.

I'm not aware of any users. If there is a user that wants to keep the
upstream support working, we can look at bringing some of the code back
as appropriate.

See previous discussion at [2].

Remove the top-level config symbol PPC_IBM_CELL_BLADE, and then
the dependent symbols PPC_CELL_NATIVE, PPC_CELL_COMMON, CBE_RAS,
PPC_IBM_CELL_RESETBUTTON, PPC_IBM_CELL_POWERBUTTON, CBE_THERM, and
AXON_MSI. Then remove the associated C files and headers, and trim
unused header content (some is shared with PS3).

Note that PPC_CELL_COMMON sounds like it would build code shared with
PS3, but it does not. It's a relic from when code was shared between the
Blade support and QPACE support.

Most of the primary authors already have CREDITS entries, with the
exception of Christian, so add one for him.

[1]: https://www.theregister.com/2011/06/28/ibm_kills_qs22_blade
[2]: https://lore.kernel.org/linuxppc-dev/60581044-df82-40ad-b94c-56468007a93e@app.fastmail.com

Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20241218105523.416573-1-mpe@ellerman.id.au

3 files changed, 0 insertions, 354 deletions

diff --git a/arch/powerpc/include/asm/cell-pmu.h b/arch/powerpc/include/asm/cell-pmu.h
index 6a79b5d1c44f..7fbefd64b4fb 100644
--- a/arch/powerpc/include/asm/cell-pmu.h
+++ b/arch/powerpc/include/asm/cell-pmu.h
@@ -20,36 +20,9 @@
 
 /* Macros for the pm_control register. */
 #define CBE_PM_16BIT_CTR(ctr)              (1 << (24 - ((ctr) & (NR_PHYS_CTRS - 1))))
-#define CBE_PM_ENABLE_PERF_MON             0x80000000
-#define CBE_PM_STOP_AT_MAX                 0x40000000
-#define CBE_PM_TRACE_MODE_GET(pm_control)  (((pm_control) >> 28) & 0x3)
-#define CBE_PM_TRACE_MODE_SET(mode)        (((mode)  & 0x3) << 28)
-#define CBE_PM_TRACE_BUF_OVFLW(bit)        (((bit) & 0x1) << 17)
-#define CBE_PM_COUNT_MODE_SET(count)       (((count) & 0x3) << 18)
-#define CBE_PM_FREEZE_ALL_CTRS             0x00100000
-#define CBE_PM_ENABLE_EXT_TRACE            0x00008000
-#define CBE_PM_SPU_ADDR_TRACE_SET(msk)     (((msk) & 0x3) << 9)
 
 /* Macros for the trace_address register. */
-#define CBE_PM_TRACE_BUF_FULL              0x00000800
 #define CBE_PM_TRACE_BUF_EMPTY             0x00000400
-#define CBE_PM_TRACE_BUF_DATA_COUNT(ta)    ((ta) & 0x3ff)
-#define CBE_PM_TRACE_BUF_MAX_COUNT         0x400
-
-/* Macros for the pm07_control registers. */
-#define CBE_PM_CTR_INPUT_MUX(pm07_control) (((pm07_control) >> 26) & 0x3f)
-#define CBE_PM_CTR_INPUT_CONTROL           0x02000000
-#define CBE_PM_CTR_POLARITY                0x01000000
-#define CBE_PM_CTR_COUNT_CYCLES            0x00800000
-#define CBE_PM_CTR_ENABLE                  0x00400000
-#define PM07_CTR_INPUT_MUX(x)              (((x) & 0x3F) << 26)
-#define PM07_CTR_INPUT_CONTROL(x)          (((x) & 1) << 25)
-#define PM07_CTR_POLARITY(x)               (((x) & 1) << 24)
-#define PM07_CTR_COUNT_CYCLES(x)           (((x) & 1) << 23)
-#define PM07_CTR_ENABLE(x)                 (((x) & 1) << 22)
-
-/* Macros for the pm_status register. */
-#define CBE_PM_CTR_OVERFLOW_INTR(ctr)      (1 << (31 - ((ctr) & 7)))
 
 enum pm_reg_name {
 	group_control,
@@ -62,33 +35,4 @@ enum pm_reg_name {
 	pm_start_stop,
 };
 
-/* Routines for reading/writing the PMU registers. */
-extern u32  cbe_read_phys_ctr(u32 cpu, u32 phys_ctr);
-extern void cbe_write_phys_ctr(u32 cpu, u32 phys_ctr, u32 val);
-extern u32  cbe_read_ctr(u32 cpu, u32 ctr);
-extern void cbe_write_ctr(u32 cpu, u32 ctr, u32 val);
-
-extern u32  cbe_read_pm07_control(u32 cpu, u32 ctr);
-extern void cbe_write_pm07_control(u32 cpu, u32 ctr, u32 val);
-extern u32  cbe_read_pm(u32 cpu, enum pm_reg_name reg);
-extern void cbe_write_pm(u32 cpu, enum pm_reg_name reg, u32 val);
-
-extern u32  cbe_get_ctr_size(u32 cpu, u32 phys_ctr);
-extern void cbe_set_ctr_size(u32 cpu, u32 phys_ctr, u32 ctr_size);
-
-extern void cbe_enable_pm(u32 cpu);
-extern void cbe_disable_pm(u32 cpu);
-
-extern void cbe_read_trace_buffer(u32 cpu, u64 *buf);
-
-extern void cbe_enable_pm_interrupts(u32 cpu, u32 thread, u32 mask);
-extern void cbe_disable_pm_interrupts(u32 cpu);
-extern u32  cbe_get_and_clear_pm_interrupts(u32 cpu);
-extern void cbe_sync_irq(int node);
-
-#define CBE_COUNT_SUPERVISOR_MODE       0
-#define CBE_COUNT_HYPERVISOR_MODE       1
-#define CBE_COUNT_PROBLEM_MODE          2
-#define CBE_COUNT_ALL_MODES             3
-
 #endif /* __ASM_CELL_PMU_H__ */
diff --git a/arch/powerpc/include/asm/cell-regs.h b/arch/powerpc/include/asm/cell-regs.h
index e1c431ef30e0..20f7339a3d4a 100644
--- a/arch/powerpc/include/asm/cell-regs.h
+++ b/arch/powerpc/include/asm/cell-regs.h
@@ -18,293 +18,6 @@
 
 #include <asm/cell-pmu.h>
 
-/*
- *
- * Some HID register definitions
- *
- */
-
-/* CBE specific HID0 bits */
-#define HID0_CBE_THERM_WAKEUP	0x0000020000000000ul
-#define HID0_CBE_SYSERR_WAKEUP	0x0000008000000000ul
-#define HID0_CBE_THERM_INT_EN	0x0000000400000000ul
-#define HID0_CBE_SYSERR_INT_EN	0x0000000200000000ul
-
-#define MAX_CBE		2
-
-/*
- *
- * Pervasive unit register definitions
- *
- */
-
-union spe_reg {
-	u64 val;
-	u8 spe[8];
-};
-
-union ppe_spe_reg {
-	u64 val;
-	struct {
-		u32 ppe;
-		u32 spe;
-	};
-};
-
-
-struct cbe_pmd_regs {
-	/* Debug Bus Control */
-	u64	pad_0x0000;					/* 0x0000 */
-
-	u64	group_control;					/* 0x0008 */
-
-	u8	pad_0x0010_0x00a8 [0x00a8 - 0x0010];		/* 0x0010 */
-
-	u64	debug_bus_control;				/* 0x00a8 */
-
-	u8	pad_0x00b0_0x0100 [0x0100 - 0x00b0];		/* 0x00b0 */
-
-	u64	trace_aux_data;					/* 0x0100 */
-	u64	trace_buffer_0_63;				/* 0x0108 */
-	u64	trace_buffer_64_127;				/* 0x0110 */
-	u64	trace_address;					/* 0x0118 */
-	u64	ext_tr_timer;					/* 0x0120 */
-
-	u8	pad_0x0128_0x0400 [0x0400 - 0x0128];		/* 0x0128 */
-
-	/* Performance Monitor */
-	u64	pm_status;					/* 0x0400 */
-	u64	pm_control;					/* 0x0408 */
-	u64	pm_interval;					/* 0x0410 */
-	u64	pm_ctr[4];					/* 0x0418 */
-	u64	pm_start_stop;					/* 0x0438 */
-	u64	pm07_control[8];				/* 0x0440 */
-
-	u8	pad_0x0480_0x0800 [0x0800 - 0x0480];		/* 0x0480 */
-
-	/* Thermal Sensor Registers */
-	union	spe_reg	ts_ctsr1;				/* 0x0800 */
-	u64	ts_ctsr2;					/* 0x0808 */
-	union	spe_reg	ts_mtsr1;				/* 0x0810 */
-	u64	ts_mtsr2;					/* 0x0818 */
-	union	spe_reg	ts_itr1;				/* 0x0820 */
-	u64	ts_itr2;					/* 0x0828 */
-	u64	ts_gitr;					/* 0x0830 */
-	u64	ts_isr;						/* 0x0838 */
-	u64	ts_imr;						/* 0x0840 */
-	union	spe_reg	tm_cr1;					/* 0x0848 */
-	u64	tm_cr2;						/* 0x0850 */
-	u64	tm_simr;					/* 0x0858 */
-	union	ppe_spe_reg tm_tpr;				/* 0x0860 */
-	union	spe_reg	tm_str1;				/* 0x0868 */
-	u64	tm_str2;					/* 0x0870 */
-	union	ppe_spe_reg tm_tsr;				/* 0x0878 */
-
-	/* Power Management */
-	u64	pmcr;						/* 0x0880 */
-#define CBE_PMD_PAUSE_ZERO_CONTROL	0x10000
-	u64	pmsr;						/* 0x0888 */
-
-	/* Time Base Register */
-	u64	tbr;						/* 0x0890 */
-
-	u8	pad_0x0898_0x0c00 [0x0c00 - 0x0898];		/* 0x0898 */
-
-	/* Fault Isolation Registers */
-	u64	checkstop_fir;					/* 0x0c00 */
-	u64	recoverable_fir;				/* 0x0c08 */
-	u64	spec_att_mchk_fir;				/* 0x0c10 */
-	u32	fir_mode_reg;					/* 0x0c18 */
-	u8	pad_0x0c1c_0x0c20 [4];				/* 0x0c1c */
-#define CBE_PMD_FIR_MODE_M8		0x00800
-	u64	fir_enable_mask;				/* 0x0c20 */
-
-	u8	pad_0x0c28_0x0ca8 [0x0ca8 - 0x0c28];		/* 0x0c28 */
-	u64	ras_esc_0;					/* 0x0ca8 */
-	u8	pad_0x0cb0_0x1000 [0x1000 - 0x0cb0];		/* 0x0cb0 */
-};
-
-extern struct cbe_pmd_regs __iomem *cbe_get_pmd_regs(struct device_node *np);
-extern struct cbe_pmd_regs __iomem *cbe_get_cpu_pmd_regs(int cpu);
-
-/*
- * PMU shadow registers
- *
- * Many of the registers in the performance monitoring unit are write-only,
- * so we need to save a copy of what we write to those registers.
- *
- * The actual data counters are read/write. However, writing to the counters
- * only takes effect if the PMU is enabled. Otherwise the value is stored in
- * a hardware latch until the next time the PMU is enabled. So we save a copy
- * of the counter values if we need to read them back while the PMU is
- * disabled. The counter_value_in_latch field is a bitmap indicating which
- * counters currently have a value waiting to be written.
- */
-
-struct cbe_pmd_shadow_regs {
-	u32 group_control;
-	u32 debug_bus_control;
-	u32 trace_address;
-	u32 ext_tr_timer;
-	u32 pm_status;
-	u32 pm_control;
-	u32 pm_interval;
-	u32 pm_start_stop;
-	u32 pm07_control[NR_CTRS];
-
-	u32 pm_ctr[NR_PHYS_CTRS];
-	u32 counter_value_in_latch;
-};
-
-extern struct cbe_pmd_shadow_regs *cbe_get_pmd_shadow_regs(struct device_node *np);
-extern struct cbe_pmd_shadow_regs *cbe_get_cpu_pmd_shadow_regs(int cpu);
-
-/*
- *
- * IIC unit register definitions
- *
- */
-
-struct cbe_iic_pending_bits {
-	u32 data;
-	u8 flags;
-	u8 class;
-	u8 source;
-	u8 prio;
-};
-
-#define CBE_IIC_IRQ_VALID	0x80
-#define CBE_IIC_IRQ_IPI		0x40
-
-struct cbe_iic_thread_regs {
-	struct cbe_iic_pending_bits pending;
-	struct cbe_iic_pending_bits pending_destr;
-	u64 generate;
-	u64 prio;
-};
-
-struct cbe_iic_regs {
-	u8	pad_0x0000_0x0400[0x0400 - 0x0000];		/* 0x0000 */
-
-	/* IIC interrupt registers */
-	struct	cbe_iic_thread_regs thread[2];			/* 0x0400 */
-
-	u64	iic_ir;						/* 0x0440 */
-#define CBE_IIC_IR_PRIO(x)      (((x) & 0xf) << 12)
-#define CBE_IIC_IR_DEST_NODE(x) (((x) & 0xf) << 4)
-#define CBE_IIC_IR_DEST_UNIT(x) ((x) & 0xf)
-#define CBE_IIC_IR_IOC_0        0x0
-#define CBE_IIC_IR_IOC_1S       0xb
-#define CBE_IIC_IR_PT_0         0xe
-#define CBE_IIC_IR_PT_1         0xf
-
-	u64	iic_is;						/* 0x0448 */
-#define CBE_IIC_IS_PMI		0x2
-
-	u8	pad_0x0450_0x0500[0x0500 - 0x0450];		/* 0x0450 */
-
-	/* IOC FIR */
-	u64	ioc_fir_reset;					/* 0x0500 */
-	u64	ioc_fir_set;					/* 0x0508 */
-	u64	ioc_checkstop_enable;				/* 0x0510 */
-	u64	ioc_fir_error_mask;				/* 0x0518 */
-	u64	ioc_syserr_enable;				/* 0x0520 */
-	u64	ioc_fir;					/* 0x0528 */
-
-	u8	pad_0x0530_0x1000[0x1000 - 0x0530];		/* 0x0530 */
-};
-
-extern struct cbe_iic_regs __iomem *cbe_get_iic_regs(struct device_node *np);
-extern struct cbe_iic_regs __iomem *cbe_get_cpu_iic_regs(int cpu);
-
-
-struct cbe_mic_tm_regs {
-	u8	pad_0x0000_0x0040[0x0040 - 0x0000];		/* 0x0000 */
-
-	u64	mic_ctl_cnfg2;					/* 0x0040 */
-#define CBE_MIC_ENABLE_AUX_TRC		0x8000000000000000LL
-#define CBE_MIC_DISABLE_PWR_SAV_2	0x0200000000000000LL
-#define CBE_MIC_DISABLE_AUX_TRC_WRAP	0x0100000000000000LL
-#define CBE_MIC_ENABLE_AUX_TRC_INT	0x0080000000000000LL
-
-	u64	pad_0x0048;					/* 0x0048 */
-
-	u64	mic_aux_trc_base;				/* 0x0050 */
-	u64	mic_aux_trc_max_addr;				/* 0x0058 */
-	u64	mic_aux_trc_cur_addr;				/* 0x0060 */
-	u64	mic_aux_trc_grf_addr;				/* 0x0068 */
-	u64	mic_aux_trc_grf_data;				/* 0x0070 */
-
-	u64	pad_0x0078;					/* 0x0078 */
-
-	u64	mic_ctl_cnfg_0;					/* 0x0080 */
-#define CBE_MIC_DISABLE_PWR_SAV_0	0x8000000000000000LL
-
-	u64	pad_0x0088;					/* 0x0088 */
-
-	u64	slow_fast_timer_0;				/* 0x0090 */
-	u64	slow_next_timer_0;				/* 0x0098 */
-
-	u8	pad_0x00a0_0x00f8[0x00f8 - 0x00a0];		/* 0x00a0 */
-	u64    	mic_df_ecc_address_0;				/* 0x00f8 */
-
-	u8	pad_0x0100_0x01b8[0x01b8 - 0x0100];		/* 0x0100 */
-	u64    	mic_df_ecc_address_1;				/* 0x01b8 */
-
-	u64	mic_ctl_cnfg_1;					/* 0x01c0 */
-#define CBE_MIC_DISABLE_PWR_SAV_1	0x8000000000000000LL
-
-	u64	pad_0x01c8;					/* 0x01c8 */
-
-	u64	slow_fast_timer_1;				/* 0x01d0 */
-	u64	slow_next_timer_1;				/* 0x01d8 */
-
-	u8	pad_0x01e0_0x0208[0x0208 - 0x01e0];		/* 0x01e0 */
-	u64	mic_exc;					/* 0x0208 */
-#define CBE_MIC_EXC_BLOCK_SCRUB		0x0800000000000000ULL
-#define CBE_MIC_EXC_FAST_SCRUB		0x0100000000000000ULL
-
-	u64	mic_mnt_cfg;					/* 0x0210 */
-#define CBE_MIC_MNT_CFG_CHAN_0_POP	0x0002000000000000ULL
-#define CBE_MIC_MNT_CFG_CHAN_1_POP	0x0004000000000000ULL
-
-	u64	mic_df_config;					/* 0x0218 */
-#define CBE_MIC_ECC_DISABLE_0		0x4000000000000000ULL
-#define CBE_MIC_ECC_REP_SINGLE_0	0x2000000000000000ULL
-#define CBE_MIC_ECC_DISABLE_1		0x0080000000000000ULL
-#define CBE_MIC_ECC_REP_SINGLE_1	0x0040000000000000ULL
-
-	u8	pad_0x0220_0x0230[0x0230 - 0x0220];		/* 0x0220 */
-	u64	mic_fir;					/* 0x0230 */
-#define CBE_MIC_FIR_ECC_SINGLE_0_ERR	0x0200000000000000ULL
-#define CBE_MIC_FIR_ECC_MULTI_0_ERR	0x0100000000000000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_1_ERR	0x0080000000000000ULL
-#define CBE_MIC_FIR_ECC_MULTI_1_ERR	0x0040000000000000ULL
-#define CBE_MIC_FIR_ECC_ERR_MASK	0xffff000000000000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_0_CTE	0x0000020000000000ULL
-#define CBE_MIC_FIR_ECC_MULTI_0_CTE	0x0000010000000000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_1_CTE	0x0000008000000000ULL
-#define CBE_MIC_FIR_ECC_MULTI_1_CTE	0x0000004000000000ULL
-#define CBE_MIC_FIR_ECC_CTE_MASK	0x0000ffff00000000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_0_RESET	0x0000000002000000ULL
-#define CBE_MIC_FIR_ECC_MULTI_0_RESET	0x0000000001000000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_1_RESET	0x0000000000800000ULL
-#define CBE_MIC_FIR_ECC_MULTI_1_RESET	0x0000000000400000ULL
-#define CBE_MIC_FIR_ECC_RESET_MASK	0x00000000ffff0000ULL
-#define CBE_MIC_FIR_ECC_SINGLE_0_SET	0x0000000000000200ULL
-#define CBE_MIC_FIR_ECC_MULTI_0_SET	0x0000000000000100ULL
-#define CBE_MIC_FIR_ECC_SINGLE_1_SET	0x0000000000000080ULL
-#define CBE_MIC_FIR_ECC_MULTI_1_SET	0x0000000000000040ULL
-#define CBE_MIC_FIR_ECC_SET_MASK	0x000000000000ffffULL
-	u64	mic_fir_debug;					/* 0x0238 */
-
-	u8	pad_0x0240_0x1000[0x1000 - 0x0240];		/* 0x0240 */
-};
-
-extern struct cbe_mic_tm_regs __iomem *cbe_get_mic_tm_regs(struct device_node *np);
-extern struct cbe_mic_tm_regs __iomem *cbe_get_cpu_mic_tm_regs(int cpu);
-
-
 /* Cell page table entries */
 #define CBE_IOPTE_PP_W		0x8000000000000000ul /* protection: write */
 #define CBE_IOPTE_PP_R		0x4000000000000000ul /* protection: read */
@@ -315,13 +28,4 @@ extern struct cbe_mic_tm_regs __iomem *cbe_get_cpu_mic_tm_regs(int cpu);
 #define CBE_IOPTE_H		0x0000000000000800ul /* cache hint */
 #define CBE_IOPTE_IOID_Mask	0x00000000000007fful /* ioid */
 
-/* some utility functions to deal with SMT */
-extern u32 cbe_get_hw_thread_id(int cpu);
-extern u32 cbe_cpu_to_node(int cpu);
-extern u32 cbe_node_to_cpu(int node);
-
-/* Init this module early */
-extern void cbe_regs_init(void);
-
-
 #endif /* CBE_REGS_H */
diff --git a/arch/powerpc/include/asm/spu_priv1.h b/arch/powerpc/include/asm/spu_priv1.h
index 6fee411d973d..66b111fa1cd1 100644
--- a/arch/powerpc/include/asm/spu_priv1.h
+++ b/arch/powerpc/include/asm/spu_priv1.h
@@ -215,8 +215,6 @@ spu_disable_spu (struct spu_context *ctx)
  * and only intended to be used by the platform setup code.
  */
 
-extern const struct spu_priv1_ops spu_priv1_mmio_ops;
-
 extern const struct spu_management_ops spu_management_of_ops;
 
 #endif /* __KERNEL__ */