From 3ced8d73006321bd2a0412fa0ff4b065a02e7514 Mon Sep 17 00:00:00 2001 From: Christophe Lombard Date: Thu, 22 Jun 2017 15:07:27 +0200 Subject: cxl: Export library to support IBM XSL This patch exports a in-kernel 'library' API which can be called by other drivers to help interacting with an IBM XSL on a POWER9 system. The XSL (Translation Service Layer) is a stripped down version of the PSL (Power Service Layer) used in some cards such as the Mellanox CX5. Like the PSL, it implements the CAIA architecture, but has a number of differences, mostly in it's implementation dependent registers. The XSL also uses a special DMA cxl mode, which uses a slightly different init sequence for the CAPP and PHB. Signed-off-by: Andrew Donnellan Signed-off-by: Christophe Lombard Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman --- drivers/misc/cxl/native.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'drivers/misc/cxl/native.c') diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c index 2b2f8894149d..4a82c313cf71 100644 --- a/drivers/misc/cxl/native.c +++ b/drivers/misc/cxl/native.c @@ -586,17 +586,17 @@ err: #define set_endian(sr) ((sr) &= ~(CXL_PSL_SR_An_LE)) #endif -static u64 calculate_sr(struct cxl_context *ctx) +u64 cxl_calculate_sr(bool master, bool kernel, bool real_mode, bool p9) { u64 sr = 0; set_endian(sr); - if (ctx->master) + if (master) sr |= CXL_PSL_SR_An_MP; if (mfspr(SPRN_LPCR) & LPCR_TC) sr |= CXL_PSL_SR_An_TC; - if (ctx->kernel) { - if (!ctx->real_mode) + if (kernel) { + if (!real_mode) sr |= CXL_PSL_SR_An_R; sr |= (mfmsr() & MSR_SF) | CXL_PSL_SR_An_HV; } else { @@ -608,7 +608,7 @@ static u64 calculate_sr(struct cxl_context *ctx) if (!test_tsk_thread_flag(current, TIF_32BIT)) sr |= CXL_PSL_SR_An_SF; } - if (cxl_is_power9()) { + if (p9) { if (radix_enabled()) sr |= CXL_PSL_SR_An_XLAT_ror; else @@ -617,6 +617,12 @@ static u64 calculate_sr(struct cxl_context *ctx) return sr; } +static u64 calculate_sr(struct cxl_context *ctx) +{ + return cxl_calculate_sr(ctx->master, ctx->kernel, ctx->real_mode, + cxl_is_power9()); +} + static void update_ivtes_directed(struct cxl_context *ctx) { bool need_update = (ctx->status == STARTED); -- cgit v1.2.3